fix the leak

android/build.gradle

@@ -22,7 +22,7 @@ rootProject.allprojects {
 apply plugin: 'com.android.library'
 
 android {
-    compileSdkVersion 26
+    compileSdkVersion 28
     buildToolsVersion '27.0.3'
     defaultConfig {
         minSdkVersion 16

android/src/main/java/com/idlefish/flutterboost/BoostFlutterView.java

@@ -54,7 +54,7 @@ public class BoostFlutterView extends FrameLayout {
     private BoostFlutterEngine mFlutterEngine;
 
     private XFlutterView mFlutterView;
-    private PlatformPlugin mPlatformPlugin;
+    private XPlatformPlugin mPlatformPlugin;
 
     private Bundle mArguments;
 
@@ -114,7 +114,7 @@ public class BoostFlutterView extends FrameLayout {
         if (mArguments == null) {
             mArguments = new Bundle();
         }
-        mPlatformPlugin = new PlatformPlugin((Activity) getContext(), mFlutterEngine.getPlatformChannel());
+        mPlatformPlugin = new XPlatformPlugin((Activity) getContext(), mFlutterEngine.getPlatformChannel());
 
         mFlutterView = new XFlutterView(getContext(), getRenderMode(), getTransparencyMode());
         addView(mFlutterView, new FrameLayout.LayoutParams(
@@ -295,6 +295,7 @@ public class BoostFlutterView extends FrameLayout {
 
         mFlutterView.removeOnFirstFrameRenderedListener(mOnFirstFrameRenderedListener);
         mFlutterView.release();
+        mPlatformPlugin.release();
     }
 
     //混合栈的返回和原来Flutter的返回逻辑不同

android/src/main/java/com/idlefish/flutterboost/XAndroidKeyProcessor.java

@@ -13,6 +13,7 @@ public class XAndroidKeyProcessor {
     private final KeyEventChannel keyEventChannel;
     @NonNull
     private final XTextInputPlugin textInputPlugin;
+
     private int combiningCharacter;
 
     public XAndroidKeyProcessor(@NonNull KeyEventChannel keyEventChannel, @NonNull XTextInputPlugin textInputPlugin) {
@@ -20,6 +21,7 @@ public class XAndroidKeyProcessor {
         this.textInputPlugin = textInputPlugin;
     }
 
+
     public void onKeyUp(@NonNull KeyEvent keyEvent) {
         Character complexCharacter = applyCombiningCharacterToBaseCharacter(keyEvent.getUnicodeChar());
         keyEventChannel.keyUp(

android/src/main/java/com/idlefish/flutterboost/XPlatformPlugin.java

+package com.idlefish.flutterboost;
+import android.app.Activity;
+import android.app.ActivityManager.TaskDescription;
+import android.content.ClipData;
+import android.content.ClipboardManager;
+import android.content.Context;
+import android.os.Build;
+import android.support.annotation.NonNull;
+import android.support.annotation.Nullable;
+import android.view.HapticFeedbackConstants;
+import android.view.SoundEffectConstants;
+import android.view.View;
+import android.view.Window;
+
+import java.util.List;
+
+import io.flutter.embedding.engine.systemchannels.PlatformChannel;
+import io.flutter.plugin.common.ActivityLifecycleListener;
+
+public class XPlatformPlugin implements ActivityLifecycleListener {
+    public static final int DEFAULT_SYSTEM_UI = View.SYSTEM_UI_FLAG_LAYOUT_STABLE
+            | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN;
+
+    private  Activity activity;
+    private final PlatformChannel platformChannel;
+    private PlatformChannel.SystemChromeStyle currentTheme;
+    private int mEnabledOverlays;
+
+    private final PlatformChannel.PlatformMessageHandler mPlatformMessageHandler = new PlatformChannel.PlatformMessageHandler() {
+        @Override
+        public void playSystemSound(@NonNull PlatformChannel.SoundType soundType) {
+            XPlatformPlugin.this.playSystemSound(soundType);
+        }
+
+        @Override
+        public void vibrateHapticFeedback(@NonNull PlatformChannel.HapticFeedbackType feedbackType) {
+            XPlatformPlugin.this.vibrateHapticFeedback(feedbackType);
+        }
+
+        @Override
+        public void setPreferredOrientations(int androidOrientation) {
+            setSystemChromePreferredOrientations(androidOrientation);
+        }
+
+        @Override
+        public void setApplicationSwitcherDescription(@NonNull PlatformChannel.AppSwitcherDescription description) {
+            setSystemChromeApplicationSwitcherDescription(description);
+        }
+
+        @Override
+        public void showSystemOverlays(@NonNull List<PlatformChannel.SystemUiOverlay> overlays) {
+            setSystemChromeEnabledSystemUIOverlays(overlays);
+        }
+
+        @Override
+        public void restoreSystemUiOverlays() {
+            restoreSystemChromeSystemUIOverlays();
+        }
+
+        @Override
+        public void setSystemUiOverlayStyle(@NonNull PlatformChannel.SystemChromeStyle systemUiOverlayStyle) {
+            setSystemChromeSystemUIOverlayStyle(systemUiOverlayStyle);
+        }
+
+        @Override
+        public void popSystemNavigator() {
+            XPlatformPlugin.this.popSystemNavigator();
+        }
+
+        @Override
+        public CharSequence getClipboardData(@Nullable PlatformChannel.ClipboardContentFormat format) {
+            return XPlatformPlugin.this.getClipboardData(format);
+        }
+
+        @Override
+        public void setClipboardData(@NonNull String text) {
+            XPlatformPlugin.this.setClipboardData(text);
+        }
+    };
+
+    public XPlatformPlugin(Activity activity, PlatformChannel platformChannel) {
+        this.activity = activity;
+        this.platformChannel = platformChannel;
+        this.platformChannel.setPlatformMessageHandler(mPlatformMessageHandler);
+
+        mEnabledOverlays = DEFAULT_SYSTEM_UI;
+    }
+
+    private void playSystemSound(PlatformChannel.SoundType soundType) {
+        if (soundType == PlatformChannel.SoundType.CLICK) {
+            View view = activity.getWindow().getDecorView();
+            view.playSoundEffect(SoundEffectConstants.CLICK);
+        }
+    }
+
+    private void vibrateHapticFeedback(PlatformChannel.HapticFeedbackType feedbackType) {
+        View view = activity.getWindow().getDecorView();
+        switch (feedbackType) {
+            case STANDARD:
+                view.performHapticFeedback(HapticFeedbackConstants.LONG_PRESS);
+                break;
+            case LIGHT_IMPACT:
+                view.performHapticFeedback(HapticFeedbackConstants.VIRTUAL_KEY);
+                break;
+            case MEDIUM_IMPACT:
+                view.performHapticFeedback(HapticFeedbackConstants.KEYBOARD_TAP);
+                break;
+            case HEAVY_IMPACT:
+                // HapticFeedbackConstants.CONTEXT_CLICK from API level 23.
+                view.performHapticFeedback(6);
+                break;
+            case SELECTION_CLICK:
+                view.performHapticFeedback(HapticFeedbackConstants.CLOCK_TICK);
+                break;
+        }
+    }
+
+    private void setSystemChromePreferredOrientations(int androidOrientation) {
+        activity.setRequestedOrientation(androidOrientation);
+    }
+
+    private void setSystemChromeApplicationSwitcherDescription(PlatformChannel.AppSwitcherDescription description) {
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
+            return;
+        }
+
+        // Linter refuses to believe we're only executing this code in API 28 unless we use distinct if blocks and
+        // hardcode the API 28 constant.
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.P && Build.VERSION.SDK_INT > Build.VERSION_CODES.LOLLIPOP) {
+            activity.setTaskDescription(new TaskDescription(description.label));
+        }
+        if (Build.VERSION.SDK_INT >= 28) {
+            TaskDescription taskDescription = new TaskDescription(description.label, 0, description.color);
+            activity.setTaskDescription(taskDescription);
+        }
+    }
+
+    private void setSystemChromeEnabledSystemUIOverlays(List<PlatformChannel.SystemUiOverlay> overlaysToShow) {
+        // Start by assuming we want to hide all system overlays (like an immersive game).
+        int enabledOverlays = DEFAULT_SYSTEM_UI
+            | View.SYSTEM_UI_FLAG_FULLSCREEN
+            | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
+            | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION;
+
+        if (overlaysToShow.size() == 0) {
+            enabledOverlays |= View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY;
+        }
+
+        // Re-add any desired system overlays.
+        for (int i = 0; i < overlaysToShow.size(); ++i) {
+            PlatformChannel.SystemUiOverlay overlayToShow = overlaysToShow.get(i);
+            switch (overlayToShow) {
+                case TOP_OVERLAYS:
+                    enabledOverlays &= ~View.SYSTEM_UI_FLAG_FULLSCREEN;
+                    break;
+                case BOTTOM_OVERLAYS:
+                    enabledOverlays &= ~View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION;
+                    enabledOverlays &= ~View.SYSTEM_UI_FLAG_HIDE_NAVIGATION;
+                    break;
+            }
+        }
+
+        mEnabledOverlays = enabledOverlays;
+        updateSystemUiOverlays();
+    }
+
+    private void updateSystemUiOverlays(){
+        activity.getWindow().getDecorView().setSystemUiVisibility(mEnabledOverlays);
+        if (currentTheme != null) {
+            setSystemChromeSystemUIOverlayStyle(currentTheme);
+        }
+    }
+
+    private void restoreSystemChromeSystemUIOverlays() {
+        updateSystemUiOverlays();
+    }
+
+    private void setSystemChromeSystemUIOverlayStyle(PlatformChannel.SystemChromeStyle systemChromeStyle) {
+        Window window = activity.getWindow();
+        View view = window.getDecorView();
+        int flags = view.getSystemUiVisibility();
+        // You can change the navigation bar color (including translucent colors)
+        // in Android, but you can't change the color of the navigation buttons until Android O.
+        // LIGHT vs DARK effectively isn't supported until then.
+        // Build.VERSION_CODES.O
+        if (Build.VERSION.SDK_INT >= 26) {
+            if (systemChromeStyle.systemNavigationBarIconBrightness != null) {
+                switch (systemChromeStyle.systemNavigationBarIconBrightness) {
+                    case DARK:
+                        //View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR
+                        flags |= 0x10;
+                        break;
+                    case LIGHT:
+                        flags &= ~0x10;
+                        break;
+                }
+            }
+            if (systemChromeStyle.systemNavigationBarColor != null) {
+                window.setNavigationBarColor(systemChromeStyle.systemNavigationBarColor);
+            }
+        }
+        // Build.VERSION_CODES.M
+        if (Build.VERSION.SDK_INT >= 23) {
+            if (systemChromeStyle.statusBarIconBrightness != null) {
+                switch (systemChromeStyle.statusBarIconBrightness) {
+                    case DARK:
+                        // View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR
+                        flags |= 0x2000;
+                        break;
+                    case LIGHT:
+                        flags &= ~0x2000;
+                        break;
+                }
+            }
+            if (systemChromeStyle.statusBarColor != null) {
+                window.setStatusBarColor(systemChromeStyle.statusBarColor);
+            }
+        }
+        if (systemChromeStyle.systemNavigationBarDividerColor != null) {
+            // Not availible until Android P.
+            // window.setNavigationBarDividerColor(systemNavigationBarDividerColor);
+        }
+        view.setSystemUiVisibility(flags);
+        currentTheme = systemChromeStyle;
+    }
+
+    private void popSystemNavigator() {
+        activity.finish();
+    }
+
+    private CharSequence getClipboardData(PlatformChannel.ClipboardContentFormat format) {
+        ClipboardManager clipboard = (ClipboardManager) activity.getSystemService(Context.CLIPBOARD_SERVICE);
+        ClipData clip = clipboard.getPrimaryClip();
+        if (clip == null)
+            return null;
+
+        if (format == null || format == PlatformChannel.ClipboardContentFormat.PLAIN_TEXT) {
+            return clip.getItemAt(0).coerceToText(activity);
+        }
+
+        return null;
+    }
+
+    private void setClipboardData(String text) {
+        ClipboardManager clipboard = (ClipboardManager) activity.getSystemService(Context.CLIPBOARD_SERVICE);
+        ClipData clip = ClipData.newPlainText("text label?", text);
+        clipboard.setPrimaryClip(clip);
+    }
+
+    @Override
+    public void onPostResume() {
+        updateSystemUiOverlays();
+    }
+    public void release(){
+        this.activity=null;
+    }
+}
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