拿掉LOG

2.優化VideoView get/set

.idea/compiler.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="CompilerConfiguration">
-    <bytecodeTargetLevel target="16" />
+    <bytecodeTargetLevel target="17" />
   </component>
 </project>

.idea/gradle.xml

@@ -7,7 +7,7 @@
         <option name="testRunner" value="GRADLE" />
         <option name="distributionType" value="DEFAULT_WRAPPED" />
         <option name="externalProjectPath" value="$PROJECT_DIR$" />
-        <option name="gradleJvm" value="semeru-16" />
+        <option name="gradleJvm" value="jbr-17" />
         <option name="modules">
           <set>
             <option value="$PROJECT_DIR$" />

.idea/misc.xml

@@ -1,4 +1,3 @@
-<?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="DesignSurface">
     <option name="filePathToZoomLevelMap">
@@ -16,5 +15,5 @@
     </option>
   </component>
   <component name="ExternalStorageConfigurationManager" enabled="true" />
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_16_PREVIEW" project-jdk-name="11" project-jdk-type="JavaSDK" />
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_17" default="true" project-jdk-name="jbr-17" project-jdk-type="JavaSDK" />
 </project>

app/build.gradle

@@ -6,6 +6,7 @@ plugins {
 }
 
 android {
+    namespace 'com.ray650128.gstreamer_demo_app'
     ndkVersion "21.3.6528147"
     compileSdk 33
 
@@ -26,29 +27,28 @@ android {
         }
     }
     compileOptions {
-        sourceCompatibility JavaVersion.VERSION_1_8
-        targetCompatibility JavaVersion.VERSION_1_8
+        sourceCompatibility JavaVersion.VERSION_17
+        targetCompatibility JavaVersion.VERSION_17
     }
     kotlinOptions {
-        jvmTarget = '1.8'
+        jvmTarget = '17'
     }
     lint {
         abortOnError false
         checkReleaseBuilds false
     }
     viewBinding.enabled = true
-    namespace 'com.ray650128.gstreamer_demo_app'
 }
 
 dependencies {
 
-    implementation 'androidx.core:core-ktx:1.9.0'
-    implementation 'androidx.appcompat:appcompat:1.5.1'
-    implementation 'com.google.android.material:material:1.7.0'
+    implementation 'androidx.core:core-ktx:1.10.1'
+    implementation 'androidx.appcompat:appcompat:1.6.1'
+    implementation 'com.google.android.material:material:1.9.0'
     implementation 'androidx.constraintlayout:constraintlayout:2.1.4'
     implementation 'androidx.legacy:legacy-support-v4:1.0.0'
     implementation 'androidx.gridlayout:gridlayout:1.0.0'
-    implementation 'androidx.core:core-ktx:+'
+    implementation 'androidx.core:core-ktx:1.10.1'
     testImplementation 'junit:junit:4.13.2'
     androidTestImplementation 'androidx.test.ext:junit:1.1.5'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.5.1'
@@ -56,6 +56,6 @@ dependencies {
     implementation project(path: ':gstreamer_player')
 
     // Android Jetpack lib
-    implementation("androidx.fragment:fragment-ktx:1.5.5")
-    implementation("androidx.activity:activity-ktx:1.6.1")
+    implementation("androidx.fragment:fragment-ktx:1.5.7")
+    implementation("androidx.activity:activity-ktx:1.7.1")
 }

app/src/main/java/com/ray650128/gstreamer_demo_app/Constants.kt

@@ -1,5 +1,12 @@
 package com.ray650128.gstreamer_demo_app
 
 object Constants {
+    //region Split mode
+    const val SPLIT_MODE_SIXTEEN = 16
+    const val SPLIT_MODE_NINE = 9
+    const val SPLIT_MODE_FOUR = 4
+    const val SPLIT_MODE_SINGLE = 1
+    //endregion
+
     const val CONF_DELAY_BASE_MILLIS = 1000L
 }

app/src/main/java/com/ray650128/gstreamer_demo_app/DisplayUtils.kt

@@ -0,0 +1,94 @@
+package com.ray650128.gstreamer_demo_app
+
+import android.content.Context
+import android.os.Build
+import android.util.DisplayMetrics
+import android.view.WindowManager
+
+/**
+ * 螢幕參數工具類別
+ * @author Raymond Yang
+ */
+class DisplayUtils(private var context: Context) {
+    private val TAG = DisplayUtils::class.java.simpleName
+
+    /**
+     * 取得螢幕寬度
+     * @return 螢幕寬度值
+     */
+    fun getScreenWidth(): Int {
+        val windowManager = context.getSystemService(Context.WINDOW_SERVICE) as WindowManager
+
+        return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
+            val windowMetrics = windowManager.currentWindowMetrics
+            windowMetrics.bounds.width()
+        } else {
+            val metric = DisplayMetrics()
+            @Suppress("DEPRECATION")
+            windowManager.defaultDisplay.getMetrics(metric)
+            metric.widthPixels
+        }
+    }
+
+    /**
+     * 取得螢幕高度
+     * @return 螢幕高度值
+     */
+    fun getScreenHeight(): Int {
+        val windowManager = context.getSystemService(Context.WINDOW_SERVICE) as WindowManager
+
+        return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
+            val windowMetrics = windowManager.currentWindowMetrics
+            windowMetrics.bounds.height()
+        } else {
+            val metric = DisplayMetrics()
+            @Suppress("DEPRECATION")
+            windowManager.defaultDisplay.getMetrics(metric)
+            metric.heightPixels
+        }
+    }
+
+    /**
+     * 取得狀態列高度
+     * @return 狀態列高度值
+     */
+    fun getStatusBarHeight(): Int {
+        var result = 0
+        val resourceId: Int = context.resources.getIdentifier(
+            "status_bar_height",
+            "dimen",
+            "android"
+        )
+        if (resourceId > 0) {
+            result = context.resources.getDimensionPixelSize(resourceId)
+        }
+        return result
+    }
+
+    /**
+     * 取得導航列高度
+     * @return 導航列高度值
+     */
+    fun getNavigationBarHeight(): Int {
+        val resources = context.resources
+        val resourceId: Int = resources.getIdentifier("navigation_bar_height", "dimen", "android")
+        return if (resourceId > 0) {
+            resources.getDimensionPixelSize(resourceId)
+        } else 0
+    }
+
+    /**
+     * 取得視窗範圍高度
+     * @return 視窗範圍高度值
+     */
+    fun getWindowHeight(): Int {
+        val screen = getScreenHeight()
+        val statusBar = getStatusBarHeight()
+        val navBar = getNavigationBarHeight()
+        return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
+            screen - statusBar - navBar
+        } else {
+            screen
+        }
+    }
+}

app/src/main/java/com/ray650128/gstreamer_demo_app/PreferenceUtil.kt

@@ -19,6 +19,6 @@ object PreferenceUtil {
         set(value) = sharedPreferences.edit().putBoolean(IS_FIRST_OPEN_KEY, value).apply()
 
     var lastSplitMode: Int
-        get() = sharedPreferences.getInt(LAST_SPLIT_MODE, MainViewModel.PAGE_MODE_ONE)
+        get() = sharedPreferences.getInt(LAST_SPLIT_MODE, Constants.SPLIT_MODE_SINGLE)
         set(value) = sharedPreferences.edit().putInt(LAST_SPLIT_MODE, value).apply()
 }

app/src/main/java/com/ray650128/gstreamer_demo_app/ui/HorizontalPager.java

@@ -0,0 +1,484 @@
+package com.ray650128.gstreamer_demo_app.ui;
+
+import android.content.Context;
+import android.util.AttributeSet;
+import android.util.DisplayMetrics;
+import android.view.Display;
+import android.view.MotionEvent;
+import android.view.VelocityTracker;
+import android.view.View;
+import android.view.ViewConfiguration;
+import android.view.ViewGroup;
+import android.view.WindowManager;
+import android.widget.Scroller;
+
+/**
+ * A view group that allows users to switch between multiple screens (layouts) in the same way as
+ * the Android home screen (Launcher application).
+ * <p>
+ * You can add and remove views using the normal methods {@link ViewGroup#addView(View)},
+ * {@link ViewGroup#removeView(View)} etc. You may want to listen for updates by calling
+ * {@link HorizontalPager#setOnScreenSwitchListener(OnScreenSwitchListener)} in order to perform
+ * operations once a new screen has been selected.
+ *
+ * Modifications from original version (ysamlan): Animate argument in setCurrentScreen and duration
+ * in snapToScreen; onInterceptTouchEvent handling to support nesting a vertical Scrollview inside
+ * the RealViewSwitcher; allowing snapping to a view even during an ongoing scroll; snap to
+ * next/prev view on 25% scroll change; density-independent swipe sensitivity; width-independent
+ * pager animation durations on scrolling to properly handle large screens without excessively
+ * long animations.
+ *
+ * Other modifications:
+ * (aveyD) Handle orientation changes properly and fully snap to the right position.
+ *
+ * @author Marc Reichelt, <a href="http://www.marcreichelt.de/">http://www.marcreichelt.de/</a>
+ * @version 0.1.0
+ */
+public final class HorizontalPager extends ViewGroup {
+    /*
+     * How long to animate between screens when programmatically setting with setCurrentScreen using
+     * the animate parameter
+     */
+    private static final int ANIMATION_SCREEN_SET_DURATION_MILLIS = 500;
+    // What fraction (1/x) of the screen the user must swipe to indicate a page change
+    private static final int FRACTION_OF_SCREEN_WIDTH_FOR_SWIPE = 4;
+    private static final int INVALID_SCREEN = -1;
+    /*
+     * Velocity of a swipe (in density-independent pixels per second) to force a swipe to the
+     * next/previous screen. Adjusted into mDensityAdjustedSnapVelocity on init.
+     */
+    private static final int SNAP_VELOCITY_DIP_PER_SECOND = 600;
+    // Argument to getVelocity for units to give pixels per second (1 = pixels per millisecond).
+    private static final int VELOCITY_UNIT_PIXELS_PER_SECOND = 1000;
+
+    private static final int TOUCH_STATE_REST = 0;
+    private static final int TOUCH_STATE_HORIZONTAL_SCROLLING = 1;
+    private static final int TOUCH_STATE_VERTICAL_SCROLLING = -1;
+    private int mCurrentScreen;
+    private int mDensityAdjustedSnapVelocity;
+    private boolean mFirstLayout = true;
+    private float mLastMotionX;
+    private float mLastMotionY;
+    private OnScreenSwitchListener mOnScreenSwitchListener;
+    private int mMaximumVelocity;
+    private int mNextScreen = INVALID_SCREEN;
+    private Scroller mScroller;
+    private int mTouchSlop;
+    private int mTouchState = TOUCH_STATE_REST;
+    private VelocityTracker mVelocityTracker;
+    private int mLastSeenLayoutWidth = -1;
+
+    /**
+     * Simple constructor to use when creating a view from code.
+     *
+     * @param context The Context the view is running in, through which it can
+     *        access the current theme, resources, etc.
+     */
+    public HorizontalPager(final Context context) {
+        super(context);
+        init();
+    }
+
+    /**
+     * Constructor that is called when inflating a view from XML. This is called
+     * when a view is being constructed from an XML file, supplying attributes
+     * that were specified in the XML file. This version uses a default style of
+     * 0, so the only attribute values applied are those in the Context's Theme
+     * and the given AttributeSet.
+     *
+     * <p>
+     * The method onFinishInflate() will be called after all children have been
+     * added.
+     *
+     * @param context The Context the view is running in, through which it can
+     *        access the current theme, resources, etc.
+     * @param attrs The attributes of the XML tag that is inflating the view.
+     * @see #View(Context, AttributeSet, int)
+     */
+    public HorizontalPager(final Context context, final AttributeSet attrs) {
+        super(context, attrs);
+        init();
+    }
+
+    /**
+     * Sets up the scroller and touch/fling sensitivity parameters for the pager.
+     */
+    private void init() {
+        mScroller = new Scroller(getContext());
+
+        // Calculate the density-dependent snap velocity in pixels
+        DisplayMetrics displayMetrics = new DisplayMetrics();
+        ((WindowManager) getContext().getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay()
+                .getMetrics(displayMetrics);
+        mDensityAdjustedSnapVelocity =
+                (int) (displayMetrics.density * SNAP_VELOCITY_DIP_PER_SECOND);
+
+        final ViewConfiguration configuration = ViewConfiguration.get(getContext());
+        mTouchSlop = configuration.getScaledTouchSlop();
+        mMaximumVelocity = configuration.getScaledMaximumFlingVelocity();
+    }
+
+    @Override
+    protected void onMeasure(final int widthMeasureSpec, final int heightMeasureSpec) {
+        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
+
+        final int width = MeasureSpec.getSize(widthMeasureSpec);
+        final int widthMode = MeasureSpec.getMode(widthMeasureSpec);
+        if (widthMode != MeasureSpec.EXACTLY) {
+            throw new IllegalStateException("ViewSwitcher can only be used in EXACTLY mode.");
+        }
+
+        final int heightMode = MeasureSpec.getMode(heightMeasureSpec);
+        if (heightMode != MeasureSpec.EXACTLY) {
+            throw new IllegalStateException("ViewSwitcher can only be used in EXACTLY mode.");
+        }
+
+        // The children are given the same width and height as the workspace
+        final int count = getChildCount();
+        for (int i = 0; i < count; i++) {
+            getChildAt(i).measure(widthMeasureSpec, heightMeasureSpec);
+        }
+
+        if (mFirstLayout) {
+            scrollTo(mCurrentScreen * width, 0);
+            mFirstLayout = false;
+        }
+
+        else if (width != mLastSeenLayoutWidth) { // Width has changed
+            /*
+             * Recalculate the width and scroll to the right position to be sure we're in the right
+             * place in the event that we had a rotation that didn't result in an activity restart
+             * (code by aveyD). Without this you can end up between two pages after a rotation.
+             */
+            Display display =
+                    ((WindowManager) getContext().getSystemService(Context.WINDOW_SERVICE))
+                            .getDefaultDisplay();
+            int displayWidth = display.getWidth();
+
+            mNextScreen = Math.max(0, Math.min(getCurrentScreen(), getChildCount() - 1));
+            final int newX = mNextScreen * displayWidth;
+            final int delta = newX - getScrollX();
+
+            mScroller.startScroll(getScrollX(), 0, delta, 0, 0);
+        }
+
+        mLastSeenLayoutWidth   = width;
+    }
+
+    @Override
+    protected void onLayout(final boolean changed, final int l, final int t, final int r,
+            final int b) {
+        int childLeft = 0;
+        final int count = getChildCount();
+
+        for (int i = 0; i < count; i++) {
+            final View child = getChildAt(i);
+            if (child.getVisibility() != View.GONE) {
+                final int childWidth = child.getMeasuredWidth();
+                child.layout(childLeft, 0, childLeft + childWidth, child.getMeasuredHeight());
+                childLeft += childWidth;
+            }
+        }
+    }
+
+    @Override
+    public boolean onInterceptTouchEvent(final MotionEvent ev) {
+        /*
+         * By Yoni Samlan: Modified onInterceptTouchEvent based on standard ScrollView's
+         * onIntercept. The logic is designed to support a nested vertically scrolling view inside
+         * this one; once a scroll registers for X-wise scrolling, handle it in this view and don't
+         * let the children, but once a scroll registers for y-wise scrolling, let the children
+         * handle it exclusively.
+         */
+        final int action = ev.getAction();
+        boolean intercept = false;
+
+        switch (action) {
+            case MotionEvent.ACTION_MOVE:
+                /*
+                 * If we're in a horizontal scroll event, take it (intercept further events). But if
+                 * we're mid-vertical-scroll, don't even try; let the children deal with it. If we
+                 * haven't found a scroll event yet, check for one.
+                 */
+                if (mTouchState == TOUCH_STATE_HORIZONTAL_SCROLLING) {
+                    /*
+                     * We've already started a horizontal scroll; set intercept to true so we can
+                     * take the remainder of all touch events in onTouchEvent.
+                     */
+                    intercept = true;
+                } else if (mTouchState == TOUCH_STATE_VERTICAL_SCROLLING) {
+                    // Let children handle the events for the duration of the scroll event.
+                    intercept = false;
+                } else { // We haven't picked up a scroll event yet; check for one.
+
+                    /*
+                     * If we detected a horizontal scroll event, start stealing touch events (mark
+                     * as scrolling). Otherwise, see if we had a vertical scroll event -- if so, let
+                     * the children handle it and don't look to intercept again until the motion is
+                     * done.
+                     */
+
+                    final float x = ev.getX();
+                    final int xDiff = (int) Math.abs(x - mLastMotionX);
+                    boolean xMoved = xDiff > mTouchSlop;
+
+                    if (xMoved) {
+                        // Scroll if the user moved far enough along the X axis
+                        mTouchState = TOUCH_STATE_HORIZONTAL_SCROLLING;
+                        mLastMotionX = x;
+                    }
+
+                    final float y = ev.getY();
+                    final int yDiff = (int) Math.abs(y - mLastMotionY);
+                    boolean yMoved = yDiff > mTouchSlop;
+
+                    if (yMoved) {
+                        mTouchState = TOUCH_STATE_VERTICAL_SCROLLING;
+                    }
+                }
+
+                break;
+            case MotionEvent.ACTION_CANCEL:
+            case MotionEvent.ACTION_UP:
+                // Release the drag.
+                mTouchState = TOUCH_STATE_REST;
+                break;
+            case MotionEvent.ACTION_DOWN:
+                /*
+                 * No motion yet, but register the coordinates so we can check for intercept at the
+                 * next MOVE event.
+                 */
+                mLastMotionY = ev.getY();
+                mLastMotionX = ev.getX();
+                break;
+            default:
+                break;
+            }
+
+        return intercept;
+    }
+
+    @Override
+    public boolean onTouchEvent(final MotionEvent ev) {
+
+        if (mVelocityTracker == null) {
+            mVelocityTracker = VelocityTracker.obtain();
+        }
+        mVelocityTracker.addMovement(ev);
+
+        final int action = ev.getAction();
+        final float x = ev.getX();
+
+        switch (action) {
+            case MotionEvent.ACTION_DOWN:
+                /*
+                 * If being flinged and user touches, stop the fling. isFinished will be false if
+                 * being flinged.
+                 */
+                if (!mScroller.isFinished()) {
+                    mScroller.abortAnimation();
+                }
+
+                // Remember where the motion event started
+                mLastMotionX = x;
+
+                if (mScroller.isFinished()) {
+                    mTouchState = TOUCH_STATE_REST;
+                } else {
+                    mTouchState = TOUCH_STATE_HORIZONTAL_SCROLLING;
+                }
+
+                break;
+            case MotionEvent.ACTION_MOVE:
+                final int xDiff = (int) Math.abs(x - mLastMotionX);
+                boolean xMoved = xDiff > mTouchSlop;
+
+                if (xMoved) {
+                    // Scroll if the user moved far enough along the X axis
+                    mTouchState = TOUCH_STATE_HORIZONTAL_SCROLLING;
+                }
+
+                if (mTouchState == TOUCH_STATE_HORIZONTAL_SCROLLING) {
+                    // Scroll to follow the motion event
+                    final int deltaX = (int) (mLastMotionX - x);
+                    mLastMotionX = x;
+                    final int scrollX = getScrollX();
+
+                    if (deltaX < 0) {
+                        if (scrollX > 0) {
+                            scrollBy(Math.max(-scrollX, deltaX), 0);
+                        }
+                    } else if (deltaX > 0) {
+                        final int availableToScroll =
+                                getChildAt(getChildCount() - 1).getRight() - scrollX - getWidth();
+
+                        if (availableToScroll > 0) {
+                            scrollBy(Math.min(availableToScroll, deltaX), 0);
+                        }
+                    }
+                }
+
+                break;
+
+            case MotionEvent.ACTION_UP:
+                if (mTouchState == TOUCH_STATE_HORIZONTAL_SCROLLING) {
+                    final VelocityTracker velocityTracker = mVelocityTracker;
+                    velocityTracker.computeCurrentVelocity(VELOCITY_UNIT_PIXELS_PER_SECOND,
+                            mMaximumVelocity);
+                    int velocityX = (int) velocityTracker.getXVelocity();
+
+                    if (velocityX > mDensityAdjustedSnapVelocity && mCurrentScreen > 0) {
+                        // Fling hard enough to move left
+                        snapToScreen(mCurrentScreen - 1);
+                    } else if (velocityX < -mDensityAdjustedSnapVelocity
+                            && mCurrentScreen < getChildCount() - 1) {
+                        // Fling hard enough to move right
+                        snapToScreen(mCurrentScreen + 1);
+                    } else {
+                        snapToDestination();
+                    }
+
+                    if (mVelocityTracker != null) {
+                        mVelocityTracker.recycle();
+                        mVelocityTracker = null;
+                    }
+                }
+
+                mTouchState = TOUCH_STATE_REST;
+
+                break;
+            case MotionEvent.ACTION_CANCEL:
+                mTouchState = TOUCH_STATE_REST;
+                break;
+            default:
+                break;
+        }
+
+        return true;
+    }
+
+    @Override
+    public void computeScroll() {
+        if (mScroller.computeScrollOffset()) {
+            scrollTo(mScroller.getCurrX(), mScroller.getCurrY());
+            postInvalidate();
+        } else if (mNextScreen != INVALID_SCREEN) {
+            mCurrentScreen = Math.max(0, Math.min(mNextScreen, getChildCount() - 1));
+
+            // Notify observer about screen change
+            if (mOnScreenSwitchListener != null) {
+                mOnScreenSwitchListener.onScreenSwitched(mCurrentScreen);
+            }
+
+            mNextScreen = INVALID_SCREEN;
+        }
+    }
+
+    /**
+     * Returns the index of the currently displayed screen.
+     *
+     * @return The index of the currently displayed screen.
+     */
+    public int getCurrentScreen() {
+        return mCurrentScreen;
+    }
+
+    /**
+     * Sets the current screen.
+     *
+     * @param currentScreen The new screen.
+     * @param animate True to smoothly scroll to the screen, false to snap instantly
+     */
+    public void setCurrentScreen(final int currentScreen, final boolean animate) {
+        mCurrentScreen = Math.max(0, Math.min(currentScreen, getChildCount() - 1));
+        if (animate) {
+            snapToScreen(currentScreen, ANIMATION_SCREEN_SET_DURATION_MILLIS);
+        } else {
+            scrollTo(mCurrentScreen * getWidth(), 0);
+        }
+        invalidate();
+    }
+
+    /**
+     * Sets the {@link OnScreenSwitchListener}.
+     *
+     * @param onScreenSwitchListener The listener for switch events.
+     */
+    public void setOnScreenSwitchListener(final OnScreenSwitchListener onScreenSwitchListener) {
+        mOnScreenSwitchListener = onScreenSwitchListener;
+    }
+
+    /**
+     * Snaps to the screen we think the user wants (the current screen for very small movements; the
+     * next/prev screen for bigger movements).
+     */
+    private void snapToDestination() {
+        final int screenWidth = getWidth();
+        int scrollX = getScrollX();
+        int whichScreen = mCurrentScreen;
+        int deltaX = scrollX - (screenWidth * mCurrentScreen);
+
+        // Check if they want to go to the prev. screen
+        if ((deltaX < 0) && mCurrentScreen != 0
+                && ((screenWidth / FRACTION_OF_SCREEN_WIDTH_FOR_SWIPE) < -deltaX)) {
+            whichScreen--;
+            // Check if they want to go to the next screen
+        } else if ((deltaX > 0) && (mCurrentScreen + 1 != getChildCount())
+                && ((screenWidth / FRACTION_OF_SCREEN_WIDTH_FOR_SWIPE) < deltaX)) {
+            whichScreen++;
+        }
+
+        snapToScreen(whichScreen);
+    }
+
+    /**
+     * Snap to a specific screen, animating automatically for a duration proportional to the
+     * distance left to scroll.
+     *
+     * @param whichScreen Screen to snap to
+     */
+    private void snapToScreen(final int whichScreen) {
+        snapToScreen(whichScreen, -1);
+    }
+
+    /**
+     * Snaps to a specific screen, animating for a specific amount of time to get there.
+     *
+     * @param whichScreen Screen to snap to
+     * @param duration -1 to automatically time it based on scroll distance; a positive number to
+     *            make the scroll take an exact duration.
+     */
+    private void snapToScreen(final int whichScreen, final int duration) {
+        /*
+         * Modified by Yoni Samlan: Allow new snapping even during an ongoing scroll animation. This
+         * is intended to make HorizontalPager work as expected when used in conjunction with a
+         * RadioGroup used as "tabbed" controls. Also, make the animation take a percentage of our
+         * normal animation time, depending how far they've already scrolled.
+         */
+        mNextScreen = Math.max(0, Math.min(whichScreen, getChildCount() - 1));
+        final int newX = mNextScreen * getWidth();
+        final int delta = newX - getScrollX();
+
+        if (duration < 0) {
+             // E.g. if they've scrolled 80% of the way, only animation for 20% of the duration
+            mScroller.startScroll(getScrollX(), 0, delta, 0, (int) (Math.abs(delta)
+                    / (float) getWidth() * ANIMATION_SCREEN_SET_DURATION_MILLIS));
+        } else {
+            mScroller.startScroll(getScrollX(), 0, delta, 0, duration);
+        }
+
+        invalidate();
+    }
+
+    /**
+     * Listener for the event that the HorizontalPager switches to a new view.
+     */
+    public static interface OnScreenSwitchListener {
+        /**
+         * Notifies listeners about the new screen. Runs after the animation completed.
+         *
+         * @param screen The new screen index.
+         */
+        void onScreenSwitched(int screen);
+    }
+}

app/src/main/java/com/ray650128/gstreamer_demo_app/ui/mainScreen/MainActivity.kt

@@ -4,9 +4,12 @@ import android.content.Context
 import android.graphics.Color
 import android.os.Bundle
 import android.util.Log
+import android.view.View
 import android.view.WindowManager
+import android.widget.FrameLayout
 import androidx.activity.viewModels
 import androidx.appcompat.app.AppCompatActivity
+import androidx.fragment.app.commit
 import androidx.viewpager2.widget.ViewPager2
 import com.ray650128.gstreamer_demo_app.Constants
 import com.ray650128.gstreamer_demo_app.R
@@ -16,24 +19,23 @@ import kotlinx.coroutines.MainScope
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.launch
 
+/**
+ * MainActivity.kt
+ * 應用程式主畫面
+ */
 class MainActivity : AppCompatActivity() {
 
     private lateinit var binding: ActivityMainBinding
 
     private val viewModel: MainViewModel by viewModels()
 
-    private val splitViewModel: SplitViewModel by viewModels()
-
     private val mContext: Context by lazy { this }
 
     private var splitMode = 1
-    private var oldSplitMode = 1
-
-    private lateinit var splitVideoViewAdapter: VideoViewAdapter
 
     private var videos: List<List<Device>>? = null
 
-    private var currentPage = 0
+    private var videoPageList: ArrayList<SplitViewFragment> = arrayListOf()
 
     override fun onCreate(savedInstanceState: Bundle?) {
         window.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON)
@@ -52,68 +54,31 @@ class MainActivity : AppCompatActivity() {
         finish()
     }
 
-    override fun onDestroy() {
-        for (i in 0 until splitVideoViewAdapter.itemCount) {
-            splitVideoViewAdapter.destroy(i)
-        }
-        super.onDestroy()
-    }
-
     private fun initContentView() = binding.apply {
         //region Content area
-        splitVideoViewAdapter = VideoViewAdapter(supportFragmentManager, lifecycle)
-
-        viewPager.apply {
-            adapter = splitVideoViewAdapter
-            offscreenPageLimit = 100
-            setPageTransformer(null)
-            registerOnPageChangeCallback(object: ViewPager2.OnPageChangeCallback() {
-                private var oldPage = 0
-                override fun onPageScrollStateChanged(state: Int) {
-                    super.onPageScrollStateChanged(state)
-                    /*if (state == ViewPager2.SCROLL_STATE_DRAGGING) {
-                        oldPage = currentPage
-                        splitVideoViewAdapter.stop(currentPage)
-                    }
-                    if (state == ViewPager2.SCROLL_STATE_IDLE && currentPage == oldPage) {
-                        splitVideoViewAdapter.play(currentPage)
-                    }*/
-                    //Log.d("Split", "oldPage: $oldPage, currentPage: $currentPage")
-                }
-                override fun onPageScrolled(
-                    position: Int,
-                    positionOffset: Float,
-                    positionOffsetPixels: Int
-                ) {
-                    super.onPageScrolled(position, positionOffset, positionOffsetPixels)
-                    //Log.d("Split", "onPageScrolled: $currentPage")
-                }
-                override fun onPageSelected(position: Int) {
-                    super.onPageSelected(position)
-                    currentPage = position
-                    splitViewModel.activePage.postValue(position)
-                    //Log.d("Split", "currentPage: $currentPage")
-                }
-            })
-        }
-
         button.setOnClickListener {
-            if (splitMode == MainViewModel.PAGE_MODE_ONE) return@setOnClickListener
-            viewModel.setSplitMode(MainViewModel.PAGE_MODE_ONE)
+            if (splitMode == Constants.SPLIT_MODE_SINGLE) return@setOnClickListener
+            viewModel.setSplitMode(Constants.SPLIT_MODE_SINGLE)
             Log.e(TAG, "+++ split style: 1")
         }
 
         button2.setOnClickListener {
-            if (splitMode == MainViewModel.PAGE_MODE_FOUR) return@setOnClickListener
-            viewModel.setSplitMode(MainViewModel.PAGE_MODE_FOUR)
+            if (splitMode == Constants.SPLIT_MODE_FOUR) return@setOnClickListener
+            viewModel.setSplitMode(Constants.SPLIT_MODE_FOUR)
             Log.e(TAG, "+++ split style: 4")
         }
 
         button3.setOnClickListener {
-            if (splitMode == MainViewModel.PAGE_MODE_NINE) return@setOnClickListener
-            viewModel.setSplitMode(MainViewModel.PAGE_MODE_NINE)
+            if (splitMode == Constants.SPLIT_MODE_NINE) return@setOnClickListener
+            viewModel.setSplitMode(Constants.SPLIT_MODE_NINE)
             Log.e(TAG, "+++ split style: 9")
         }
+
+        button4.setOnClickListener {
+            if (splitMode == Constants.SPLIT_MODE_SIXTEEN) return@setOnClickListener
+            viewModel.setSplitMode(Constants.SPLIT_MODE_SIXTEEN)
+            Log.e(TAG, "+++ split style: 16")
+        }
         //endregion
     }
 
@@ -126,19 +91,18 @@ class MainActivity : AppCompatActivity() {
         viewModel.cameraList.observe(this) { list ->
             this.videos = list
             reloadVideoViews(this.videos)
-            currentPage = 0
         }
     }
 
-    private fun reloadVideoViews(list: List<List<Device>>?) = MainScope().launch {
-        binding.viewPager.setCurrentItem(0, false)
-        for (i in 0 until splitVideoViewAdapter.itemCount) {
-            splitVideoViewAdapter.stop(i)
+    private fun reloadVideoViews(list: List<List<Device>>?) {
+        for (videoPage in videoPageList) {
+            supportFragmentManager.commit {
+                remove(videoPage)
+            }
         }
-        //delay(oldSplitMode * Constants.CONF_DELAY_BASE_MILLIS)
-        delay((oldSplitMode * 100) + Constants.CONF_DELAY_BASE_MILLIS)
-        oldSplitMode = splitMode
-        splitVideoViewAdapter.clear()
+        binding.viewPager.removeAllViews()
+        videoPageList.clear()
+
         // 如果群組內沒有裝置，則顯示底圖
         if (list.isNullOrEmpty()) {
             binding.viewPager.setBackgroundResource(R.drawable.bg_not_in_playing)
@@ -150,10 +114,16 @@ class MainActivity : AppCompatActivity() {
                     splitMode = splitMode,
                     pageData = ArrayList(list[i])
                 )
-                splitVideoViewAdapter.add(i, splitFragment)
+                videoPageList.add(i, splitFragment)
+
+                val frameLayout = FrameLayout(mContext).apply {
+                    id = View.generateViewId()
+                }
+                binding.viewPager.addView(frameLayout)
+                supportFragmentManager.commit {
+                    add(frameLayout.id, splitFragment, "$i")
+                }
             }
-            currentPage = 0
-            //binding.viewPager.currentItem = 0
         }
     }
 

app/src/main/java/com/ray650128/gstreamer_demo_app/ui/mainScreen/MainViewModel.kt

@@ -19,7 +19,7 @@ class MainViewModel: ViewModel() {
                 stream1 = "/media/video1",
                 stream2 = "/media/video2",
             ),
-            Device(
+            /*Device(
                 deviceName = "192.168.0.73",
                 ip = "192.168.0.73",
                 rtspPort = "554",
@@ -27,8 +27,8 @@ class MainViewModel: ViewModel() {
                 password = "hs22601576",
                 stream1 = "/media/video1",
                 stream2 = "/media/video2",
-            ),
-            Device(
+            ),*/
+            /*Device(
                 deviceName = "192.168.0.79",
                 ip = "192.168.0.79",
                 rtspPort = "554",
@@ -36,7 +36,7 @@ class MainViewModel: ViewModel() {
                 password = "1q2w3e4r!",
                 stream1 = "/media/video1",
                 stream2 = "/media/video2",
-            ),
+            ),*/
             Device(
                 deviceName = "192.168.0.88",
                 ip = "211.23.78.226",
@@ -64,7 +64,7 @@ class MainViewModel: ViewModel() {
                 stream1 = "/v01",
                 stream2 = "/v02",
             ),
-            Device(
+            /*Device(
                 deviceName = "192.168.0.76",
                 ip = "211.23.78.226",
                 rtspPort = "8576",
@@ -72,7 +72,7 @@ class MainViewModel: ViewModel() {
                 password = "123456",
                 stream1 = "/profile1",
                 stream2 = "/profile2",
-            ),
+            ),*/
             Device(
                 deviceName = "192.168.0.82",
                 ip = "192.168.0.82",
@@ -91,7 +91,7 @@ class MainViewModel: ViewModel() {
                 stream1 = "/profile1",
                 stream2 = "/profile2",
             ),
-            Device(
+            /*Device(
                 deviceName = "192.168.0.95",
                 ip = "192.168.0.95",
                 rtspPort = "554",
@@ -99,7 +99,7 @@ class MainViewModel: ViewModel() {
                 password = "123456",
                 stream1 = "/profile1",
                 stream2 = "/profile2",
-            )
+            )*/
         )
     }
 
@@ -137,10 +137,4 @@ class MainViewModel: ViewModel() {
         }
         return tmpData
     }
-
-    companion object {
-        const val PAGE_MODE_ONE = 1
-        const val PAGE_MODE_FOUR = 4
-        const val PAGE_MODE_NINE = 9
-    }
 }

app/src/main/java/com/ray650128/gstreamer_demo_app/ui/mainScreen/SplitViewFragment.kt

@@ -6,10 +6,12 @@ import android.util.Log
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import android.widget.ImageView
 import androidx.fragment.app.Fragment
-import androidx.fragment.app.activityViewModels
 import androidx.gridlayout.widget.GridLayout
 import com.ray650128.gstreamer_demo_app.Constants
+import com.ray650128.gstreamer_demo_app.DisplayUtils
+import com.ray650128.gstreamer_demo_app.R
 import com.ray650128.gstreamer_demo_app.databinding.FragmentSplitViewBinding
 import com.ray650128.gstreamer_demo_app.dp
 import com.ray650128.gstreamer_demo_app.model.Device
@@ -22,10 +24,8 @@ import kotlin.math.sqrt
 
 class SplitViewFragment : Fragment() {
 
-    val viewModel: SplitViewModel by activityViewModels()
-
     private var mPageNum: Int = 0
-    private var splitMode = MainViewModel.PAGE_MODE_ONE
+    private var splitMode = Constants.SPLIT_MODE_SINGLE
     private var streamType = VideoView.SUB_STREAM
     private var isClickable = true
 
@@ -56,18 +56,6 @@ class SplitViewFragment : Fragment() {
         super.onViewCreated(view, savedInstanceState)
 
         initView()
-
-        /*viewModel.activePage.observe(viewLifecycleOwner) {
-            if (it == null) return@observe
-            if (it == this.mPageNum) {
-                MainScope().launch {
-                    //delay(1000)
-                    //playAll()
-                }
-            } else {
-                //stopAll()
-            }
-        }*/
     }
 
     override fun onPause() {
@@ -83,13 +71,14 @@ class SplitViewFragment : Fragment() {
     }
 
     override fun onDestroy() {
-        super.onDestroy()
         //destroyAll()
         stopAll()
         Log.d("${TAG}_$mPageNum", "onDestroy()")
+        super.onDestroy()
     }
 
     private fun initView() {
+        val displayUtil = DisplayUtils(requireContext())
         // 生成 VideoView 分割畫面
         binding.apply {
             val maxRow = sqrt(splitMode.toFloat()).toInt()
@@ -98,126 +87,138 @@ class SplitViewFragment : Fragment() {
 
             baseView.rowCount = maxRow
             baseView.columnCount = maxCol
-            Log.e("${TAG}_$mPageNum", "baseView.rowCount: ${baseView.rowCount}, baseView.columnCount: ${baseView.columnCount}")
 
-            baseView.post {
-                for (col in 0 until maxCol) {
-                    for (row in 0 until maxRow) {
-                        val videoView = VideoView(requireContext())
-                        val layoutParam = GridLayout.LayoutParams().apply {
-                            topMargin = 0.dp
-                            bottomMargin = 0.dp
-                            marginEnd = 0.dp
-                            marginStart = 0.dp
-
-                            // 調整間距
-                            when (splitMode) {
-                                MainViewModel.PAGE_MODE_FOUR -> {
-                                    when (col) {
-                                        0 -> bottomMargin = 2.dp
-                                        1 -> topMargin = 2.dp
-                                    }
-                                    when (row) {
-                                        0 -> marginEnd = 2.dp
-                                        1 -> marginStart = 2.dp
-                                    }
-                                    width = (baseView.width / maxRow) - maxRow.dp
-                                    height = (baseView.height / maxCol) - maxCol.dp
-                                }
-                                MainViewModel.PAGE_MODE_NINE -> {
-                                    if (col == 1) {
-                                        topMargin = 4.dp
-                                        bottomMargin = 4.dp
-                                    }
-                                    if (row == 1) {
-                                        marginEnd = 4.dp
-                                        marginStart = 4.dp
-                                    }
-                                    width = (baseView.width / maxRow) - maxRow.dp
-                                    height = (baseView.height / maxCol) - maxCol.dp
-                                }
-                                MainViewModel.PAGE_MODE_ONE -> {
-                                    width = (baseView.width / maxRow)
-                                    height = (baseView.height / maxCol)
-                                }
-                            }
-                        }
-                        baseView.addView(videoView, layoutParam)
-                        videoViews.add(videoView)
-                    }
+            val cellWidth: Int
+            val cellHeight: Int
+            when (splitMode) {
+                Constants.SPLIT_MODE_SINGLE -> {
+                    cellWidth = (displayUtil.getScreenWidth() / maxRow)
+                    cellHeight = (cellWidth * 0.5625).toInt()
                 }
+                else -> {
+                    cellWidth = (displayUtil.getScreenWidth() / maxRow) - maxRow.dp
+                    cellHeight = (cellWidth * 0.5625).toInt() - maxCol.dp
+                }
+            }
 
-                setAllUrl()
+            for (col in 0 until maxCol) {
+                for (row in 0 until maxRow) {
+                    val videoView = VideoView(requireContext())
+                    val layoutParam = GridLayout.LayoutParams().apply {
+                        topMargin = 0.dp
+                        bottomMargin = 0.dp
+                        marginEnd = 0.dp
+                        marginStart = 0.dp
 
-                if (isClickable) {
-                    for (position in videoViews.indices) {
-                        videoViews[position].setOnClickListener {
-                            if (position >= data.size) return@setOnClickListener
-                            if (!videoViews[position].isPlaying) {
-                                if (!videoViews[position].isLoading) {
-                                    videoViews[position].resetRetryCount()
-                                    videoViews[position].play()
+                        width = cellWidth
+                        height = cellHeight
+
+                        // 調整間距
+                        when (splitMode) {
+                            Constants.SPLIT_MODE_FOUR -> {
+                                when (col) {
+                                    0 -> bottomMargin = 2.dp
+                                    1 -> topMargin = 2.dp
+                                }
+                                when (row) {
+                                    0 -> marginEnd = 2.dp
+                                    1 -> marginStart = 2.dp
                                 }
-                                return@setOnClickListener
                             }
-                            MainScope().launch {
-                                stopAll()
-                                delay(splitMode * Constants.CONF_DELAY_BASE_MILLIS)
-                                //delay((splitMode * 100) + Constants.CONF_DELAY_BASE_MILLIS)
-                                val item = data[position]
-                                val bundle = Bundle().apply {
-                                    //putInt(MonitoringActivity.BUNDLE_DEVICE_ID, item.id)
-                                    //putInt(MonitoringActivity.BUNDLE_CHANNEL_ID, item.channelId)
-                                    putParcelable(MonitoringActivity.BUNDLE_DEVICE, item)
+                            Constants.SPLIT_MODE_NINE -> {
+                                if (col == 1) {
+                                    topMargin = 4.dp
+                                    bottomMargin = 4.dp
+                                }
+                                if (row == 1) {
+                                    marginEnd = 4.dp
+                                    marginStart = 4.dp
+                                }
+                            }
+                            Constants.SPLIT_MODE_SIXTEEN -> {
+                                if (col == 1) {
+                                    topMargin = 4.dp
+                                    bottomMargin = 2.dp
+                                }
+                                if (col == 2) {
+                                    topMargin = 2.dp
+                                    bottomMargin = 4.dp
+                                }
+                                if (row == 1) {
+                                    marginStart = 4.dp
+                                    marginEnd = 2.dp
+                                }
+                                if (row == 2) {
+                                    marginStart = 2.dp
+                                    marginEnd = 4.dp
                                 }
-                                val intent = Intent(requireContext(), MonitoringActivity::class.java)
-                                intent.putExtras(bundle)
-                                startActivity(intent)
-                                //gotoActivity(MonitoringActivity::class.java, bundle)*/
-                                //Log.d("${TAG}_$mPageNum", "check: $item")
                             }
                         }
                     }
+                    baseView.addView(videoView, layoutParam)
+                    videoViews.add(videoView)
                 }
             }
         }
+
+        if (isClickable) {
+            videoViews.forEach { videoView ->
+                videoView.setOnClickListener {
+                    if (!videoView.isPlaying) {
+                        return@setOnClickListener
+                    }
+                    stopAll()
+                    val item = videoView.data
+                    val bundle = Bundle().apply {
+                        //putInt(MonitoringActivity.BUNDLE_DEVICE_ID, item.id)
+                        //putInt(MonitoringActivity.BUNDLE_CHANNEL_ID, item.channelId)
+                        putParcelable(MonitoringActivity.BUNDLE_DEVICE, item)
+                    }
+                    val intent = Intent(requireContext(), MonitoringActivity::class.java)
+                    intent.putExtras(bundle)
+                    startActivity(intent)
+                    //gotoActivity(MonitoringActivity::class.java, bundle)*/
+                    //Log.d("${TAG}_$mPageNum", "check: $item")
+                }
+            }
+        }
+
+        setAllUrl()
     }
 
     private fun setAllUrl() {
         for (index in data.indices) {
-            videoViews[index].setData(data[index])
-            videoViews[index].setTextVisible((splitMode != MainViewModel.PAGE_MODE_NINE))
+            videoViews[index].data = data[index]
+            videoViews[index].setTextVisible(
+                (splitMode != Constants.SPLIT_MODE_NINE && splitMode != Constants.SPLIT_MODE_SIXTEEN)
+            )
         }
     }
 
-    fun playAll() = MainScope().launch(Dispatchers.Main) {
-        if (videoViews.isEmpty()) return@launch
-        delay(splitMode * Constants.CONF_DELAY_BASE_MILLIS)
-        for (index in data.indices) {
-            if (!videoViews[index].isReady) continue
-            videoViews[index].resetRetryCount()
-            videoViews[index].play()
-            //delay(300)
+    fun playAll() {
+        videoViews.forEach { videoView ->
+            if (videoView.isReady) {
+                videoView.resetRetryCount()
+                videoView.play()
+            }
         }
-    }.start()
+    }
 
-    fun stopAll() = MainScope().launch(Dispatchers.Main) {
-        if (videoViews.isEmpty()) return@launch
-        for (index in data.indices) {
-            videoViews[index].stopRetryCount()
-            if (!videoViews[index].isPlaying || videoViews[index].isLoading) continue
-            videoViews[index].stop()
-            //delay(300)
+    fun stopAll() {
+        videoViews.forEach { videoView ->
+            videoView.stopRetryCount()
+            if (videoView.isPlaying || !videoView.isLoading) {
+                videoView.pause()
+            }
         }
-    }.start()
+    }
 
-    fun destroyAll() /*= MainScope().launch(Dispatchers.Main)*/ {
-        if (videoViews.isEmpty()) return
-        for (index in data.indices) {
-            videoViews[index].destroy()
-            //delay(100)
+    fun destroyAll() {
+        videoViews.forEach { videoView ->
+            //videoView.destroy()
+            videoView.destroySurface()
         }
-    }//.start()
+    }
 
     companion object {
         private val TAG = SplitViewFragment::class.java.simpleName

app/src/main/java/com/ray650128/gstreamer_demo_app/ui/mainScreen/VideoView.kt

@@ -9,6 +9,7 @@ import android.util.Log
 import android.view.LayoutInflater
 import android.view.SurfaceHolder
 import android.view.SurfaceView
+import android.view.TextureView
 import androidx.constraintlayout.widget.ConstraintLayout
 import androidx.core.view.isVisible
 import com.hisharp.gstreamer_player.GstCallback
@@ -34,13 +35,35 @@ class VideoView : ConstraintLayout, GstCallback {
 
     private lateinit var view: ItemVideoViewBinding
 
-    private var data: Device? = null
+    var streamType: Int = MAIN_STREAM
+
+    var data: Device? = null
+        set(value) {
+            field = value
+            if (field == null) {
+                view.textDeviceName.isVisible = false
+                isPlaying = false
+                isLoading = false
+                return
+            }
+            this.tag = field?.deviceName
+            view.textDeviceName.text = field?.deviceName
+            view.textDeviceName.isVisible = true
+            val rtspUrl = this.data?.getStreamPath(streamType) ?: return    // 如果 null 就不指派給 Gstreamer 了
+            gstLibrary.setTag(this.data!!.deviceName)
+            gstLibrary.setRtspUrl(rtspUrl)
+            Log.d("${TAG}_$tag", "Set device to: $field, rtspUrl = $rtspUrl")
+        }
 
     var isReady: Boolean = false
 
     var isLoading: Boolean = false
         set(value) {
-            view.pbLoading.isVisible = value
+            view.pbLoading.isVisible = if (retryCount in 1..5) {
+                true
+            } else {
+                value
+            }
             field = value
         }
 
@@ -58,7 +81,7 @@ class VideoView : ConstraintLayout, GstCallback {
         }
     }
 
-    private val videoView: SurfaceView by lazy { view.videoView }
+    private val videoView: TextureView by lazy { view.videoView }
 
     private lateinit var gstLibrary: GstLibrary
 
@@ -71,32 +94,23 @@ class VideoView : ConstraintLayout, GstCallback {
         view = ItemVideoViewBinding.inflate(layoutInflater, this, true)
         view.baseView.clipToOutline = true
 
-        //videoView.holder.addCallback(this)
         gstLibrary = GstLibrary(context)
-        gstLibrary.setSurfaceHolder(videoView.holder)
+        gstLibrary.setTextureView(videoView)
         gstLibrary.setOnStatusChangeListener(this)
 
+        //videoView.holder.addCallback(this)
+        //gstLibrary.setSurfaceHolder(videoView.holder)
+
         // View 預設狀態
         view.textDeviceName.isVisible = false
         isPlaying = false
         isLoading = false
-    }
 
-    fun setData(device: Device?, streamType: Int = SUB_STREAM) {
-        if (device == null) {
-            view.textDeviceName.isVisible = false
-            isPlaying = false
-            isLoading = false
-            return
+        view.btnRetry.setOnClickListener {
+            it.isVisible = false
+            resetRetryCount()
+            play()
         }
-        this.data = device
-        this.tag = device.deviceName
-        view.textDeviceName.text = device.deviceName
-        view.textDeviceName.isVisible = true
-        val rtspUrl = this.data?.getStreamPath(streamType) ?: return    // 如果 null 就不指派給 Gstreamer 了
-        gstLibrary.setTag(this.data!!.deviceName)
-        gstLibrary.setRtspUrl(rtspUrl)
-        Log.d("${TAG}_$tag", "Set device to: $device, rtspUrl = $rtspUrl")
     }
 
     fun setTextVisible(isVisible: Boolean) {
@@ -105,15 +119,22 @@ class VideoView : ConstraintLayout, GstCallback {
 
     fun play() {
         if (data == null) return
-        videoView.postInvalidate()
-        gstLibrary.play()
+        if (this::gstLibrary.isInitialized) {
+            gstLibrary.play()
+        }
     }
 
-    fun stop() {
+    fun pause() {
         if (data == null) return
         isPlaying = false
         if (this::gstLibrary.isInitialized) {
-            gstLibrary.stop()
+            gstLibrary.pause()
+        }
+    }
+
+    fun destroySurface() {
+        if (this::gstLibrary.isInitialized) {
+            gstLibrary.releaseSurface()
         }
     }
 
@@ -169,8 +190,12 @@ class VideoView : ConstraintLayout, GstCallback {
                     if (retryCount != RETRY_OFF && retryCount in 0 until 5) {
                         mHandler.post(retryRunnable)
                         retryCount++
+                        isLoading = true
+                        view.btnRetry.isVisible = false
                     } else {
                         stopRetryCount()
+                        view.btnRetry.isVisible = true
+                        isLoading = false
                         Log.e("${TAG}_$tag", "Retry count = 5, stopped retry...")
                     }
                 }

app/src/main/java/com/ray650128/gstreamer_demo_app/ui/mainScreen/VideoViewAdapter.kt

@@ -41,11 +41,17 @@ class VideoViewAdapter(
         notifyDataSetChanged()
     }
 
-    fun stop(index: Int) {
-        stop(fragments[index])
+    fun pause() {
+        for (i in fragments.indices) {
+            pause(i)
+        }
     }
 
-    private fun stop(fragment: SplitViewFragment) {
+    fun pause(index: Int) {
+        pause(fragments[index])
+    }
+
+    private fun pause(fragment: SplitViewFragment) {
         fragment.stopAll()
     }
 
@@ -57,6 +63,12 @@ class VideoViewAdapter(
         fragment.playAll()
     }
 
+    fun destroy() {
+        for (i in fragments.indices) {
+            destroy(i)
+        }
+    }
+
     fun destroy(index: Int) {
         destroy(fragments[index])
     }

app/src/main/java/com/ray650128/gstreamer_demo_app/ui/monitoringScreen/MonitoringActivity.kt

@@ -3,7 +3,7 @@ package com.ray650128.gstreamer_demo_app.ui.monitoringScreen
 import androidx.appcompat.app.AppCompatActivity
 import android.os.Bundle
 import android.view.WindowManager
-import com.ray650128.gstreamer_demo_app.databinding.ActivityMainBinding
+import com.ray650128.gstreamer_demo_app.R
 import com.ray650128.gstreamer_demo_app.databinding.ActivityMonitoringBinding
 
 class MonitoringActivity : AppCompatActivity() {
@@ -16,8 +16,19 @@ class MonitoringActivity : AppCompatActivity() {
 
         binding = ActivityMonitoringBinding.inflate(layoutInflater)
         setContentView(binding.root)
+
+        initToolbar()
     }
 
+    private fun initToolbar() {
+        supportActionBar?.setDisplayHomeAsUpEnabled(true)
+        supportActionBar?.setHomeAsUpIndicator(R.drawable.ic_back_arrow)
+    }
+
+    override fun onSupportNavigateUp(): Boolean {
+        finish()
+        return true
+    }
 
 
     companion object {

app/src/main/res/color/color_monitor_icon.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:state_enabled="false" android:color="#9b9b9b" />
+    <item android:state_enabled="true" android:color="#FF000000" />
+</selector>