improve

android/build.gradle

@@ -42,6 +42,6 @@ dependencies {
 
 ext {
     groupId = 'com.taobao.fleamarket'
-    artifactId = "FlutterBoost"
+    artifactId = "FlutterBoostPlugin"
 }
 

android/src/main/java/com/taobao/idlefish/flutterboost/BoostEngineProvider.java

@@ -23,36 +23,23 @@
  */
 package com.taobao.idlefish.flutterboost;
 
-import android.app.Activity;
 import android.content.Context;
-import android.os.Looper;
-import android.support.annotation.NonNull;
 
 import com.taobao.idlefish.flutterboost.interfaces.IFlutterEngineProvider;
+import com.taobao.idlefish.flutterboost.interfaces.IStateListener;
 
-import io.flutter.app.FlutterPluginRegistry;
-import io.flutter.embedding.engine.FlutterEngine;
 import io.flutter.embedding.engine.FlutterShellArgs;
-import io.flutter.embedding.engine.dart.DartExecutor;
-import io.flutter.plugin.common.BinaryMessenger;
-import io.flutter.plugin.common.PluginRegistry;
-import io.flutter.plugin.platform.PlatformViewRegistry;
 import io.flutter.view.FlutterMain;
-import io.flutter.view.FlutterNativeView;
-import io.flutter.view.FlutterView;
-import io.flutter.view.TextureRegistry;
 
 public class BoostEngineProvider implements IFlutterEngineProvider {
 
-    static final BoostEngineProvider sInstance = new BoostEngineProvider();
+    private BoostFlutterEngine mEngine = null;
 
-    private BoostEngine mEngine = null;
-
-    private BoostEngineProvider() {
+    BoostEngineProvider() {
     }
 
     @Override
-    public FlutterEngine createEngine(Context context) {
+    public BoostFlutterEngine createEngine(Context context) {
 
         Utils.assertCallOnMainThread();
 
@@ -61,35 +48,25 @@ public class BoostEngineProvider implements IFlutterEngineProvider {
             FlutterMain.ensureInitializationComplete(
                     context.getApplicationContext(), flutterShellArgs.toArray());
 
-            mEngine = new BoostEngine(context.getApplicationContext());
-            mEngine.startRun();
+            mEngine = new BoostFlutterEngine(context.getApplicationContext());
+
+            final IStateListener stateListener = FlutterBoostPlugin.sInstance.mStateListener;
+            if(stateListener != null) {
+                stateListener.onEngineCreated(mEngine);
+            }
         }
         return mEngine;
     }
 
     @Override
-    public FlutterEngine tryGetEngine() {
+    public BoostFlutterEngine tryGetEngine() {
         return mEngine;
     }
 
-    public static class BoostEngine extends FlutterEngine {
-        final Context mContext;
-
-        public BoostEngine(@NonNull Context context) {
-            super(context);
-            mContext = context;
-        }
-
-        public void startRun() {
-            if (!getDartExecutor().isExecutingDart()) {
-                getNavigationChannel().setInitialRoute("/");
-
-                DartExecutor.DartEntrypoint entryPoint = new DartExecutor.DartEntrypoint(
-                        mContext.getResources().getAssets(),
-                        FlutterMain.findAppBundlePath(mContext),
-                        "main");
-                getDartExecutor().executeDartEntrypoint(entryPoint);
-            }
+    public static void assertEngineRunning(){
+        final BoostFlutterEngine engine = FlutterBoostPlugin.singleton().engineProvider().tryGetEngine();
+        if(engine == null || !engine.isRunning()) {
+            throw new RuntimeException("engine is not running yet!");
         }
     }
 }

android/src/main/java/com/taobao/idlefish/flutterboost/BoostPluginRegistry.java → android/src/main/java/com/taobao/idlefish/flutterboost/BoostFlutterEngine.java

@@ -2,44 +2,116 @@ package com.taobao.idlefish.flutterboost;
 
 import android.app.Activity;
 import android.content.Context;
+import android.support.annotation.NonNull;
+import android.support.annotation.Nullable;
+
+import com.taobao.idlefish.flutterboost.interfaces.IContainerRecord;
+import com.taobao.idlefish.flutterboost.interfaces.IStateListener;
+
+import java.lang.ref.WeakReference;
 
 import io.flutter.app.FlutterPluginRegistry;
 import io.flutter.embedding.engine.FlutterEngine;
+import io.flutter.embedding.engine.dart.DartExecutor;
 import io.flutter.plugin.common.BinaryMessenger;
 import io.flutter.plugin.common.PluginRegistry;
 import io.flutter.plugin.platform.PlatformViewRegistry;
+import io.flutter.view.FlutterMain;
 import io.flutter.view.FlutterView;
 import io.flutter.view.TextureRegistry;
 
-public class BoostPluginRegistry extends FlutterPluginRegistry {
-    private final FlutterEngine mEngine;
-    private final Activity mActivity;
+public class BoostFlutterEngine extends FlutterEngine {
+    protected final Context mContext;
+    protected final BoostPluginRegistry mBoostPluginRegistry;
+
+    protected WeakReference<Activity> mCurrentActivityRef;
+
+    public BoostFlutterEngine(@NonNull Context context) {
+        super(context);
+        mContext = context.getApplicationContext();
+        mBoostPluginRegistry = new BoostPluginRegistry(this,context);
+    }
+
+    public void startRun(@Nullable Activity activity) {
+        mCurrentActivityRef = new WeakReference<>(activity);
+
+        if (!getDartExecutor().isExecutingDart()) {
 
-    public BoostPluginRegistry(FlutterEngine engine, Activity activity) {
-        super(engine, activity);
-        mEngine = engine;
-        mActivity = activity;
+            Debuger.log("engine start running...");
+
+            getNavigationChannel().setInitialRoute("/");
+
+            DartExecutor.DartEntrypoint entryPoint = new DartExecutor.DartEntrypoint(
+                    mContext.getResources().getAssets(),
+                    FlutterMain.findAppBundlePath(mContext),
+                    "main");
+            getDartExecutor().executeDartEntrypoint(entryPoint);
+
+            final IStateListener stateListener = FlutterBoostPlugin.sInstance.mStateListener;
+            if(stateListener != null) {
+                stateListener.onEngineStarted(this);
+            }
+
+            FlutterBoostPlugin.singleton().platform().onRegisterPlugins(mBoostPluginRegistry);
+        }
     }
 
-    public PluginRegistry.Registrar registrarFor(String pluginKey) {
-        return new BoostRegistrar(mActivity,mEngine,super.registrarFor(pluginKey));
+    public BoostPluginRegistry getBoostPluginRegistry(){
+        return mBoostPluginRegistry;
     }
 
-    public static class BoostRegistrar implements PluginRegistry.Registrar {
+    public boolean isRunning(){
+        return getDartExecutor().isExecutingDart();
+    }
+
+    public class BoostPluginRegistry extends FlutterPluginRegistry {
+        private final FlutterEngine mEngine;
+
+        public BoostPluginRegistry(FlutterEngine engine, Context context) {
+            super(engine, context);
+            mEngine = engine;
+        }
+
+        public PluginRegistry.Registrar registrarFor(String pluginKey) {
+            return new BoostRegistrar(mEngine,super.registrarFor(pluginKey));
+        }
+    }
+
+    public class BoostRegistrar implements PluginRegistry.Registrar {
 
         private final PluginRegistry.Registrar mRegistrar;
         private final FlutterEngine mEngine;
-        private final Activity mActivity;
 
-        BoostRegistrar(Activity activity, FlutterEngine engine, PluginRegistry.Registrar registrar) {
+        BoostRegistrar(FlutterEngine engine, PluginRegistry.Registrar registrar) {
             mRegistrar = registrar;
             mEngine = engine;
-            mActivity = activity;
         }
 
         @Override
         public Activity activity() {
-            return mActivity;
+            Activity activity;
+            IContainerRecord record;
+
+            record = FlutterBoostPlugin.singleton().containerManager().getCurrentTopRecord();
+            if(record == null) {
+                record = FlutterBoostPlugin.singleton().containerManager().getLastGenerateRecord();
+            }
+
+            if(record == null){
+                activity = FlutterBoostPlugin.singleton().currentActivity();
+            }else{
+                activity = record.getContainer().getContextActivity();
+            }
+
+            if(activity == null && mCurrentActivityRef != null) {
+                activity = mCurrentActivityRef.get();
+            }
+
+            if(activity == null) {
+                throw new RuntimeException("current has no valid Activity yet");
+            }
+
+            return activity;
         }
 
         @Override

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

@@ -26,22 +26,30 @@ package com.taobao.idlefish.flutterboost;
 import android.app.Activity;
 import android.content.Context;
 import android.content.Intent;
+import android.graphics.Color;
 import android.os.Bundle;
+import android.support.v4.view.ViewCompat;
 import android.util.Log;
+import android.view.Gravity;
+import android.view.View;
 import android.view.ViewGroup;
 import android.widget.FrameLayout;
+import android.widget.ImageView;
+import android.widget.LinearLayout;
+import android.widget.ProgressBar;
+import android.widget.TextView;
+
+import com.taobao.idlefish.flutterboost.interfaces.IStateListener;
 
 import java.util.LinkedList;
 import java.util.List;
 
 import io.flutter.embedding.android.FlutterView;
-import io.flutter.embedding.engine.FlutterEngine;
-import io.flutter.embedding.engine.renderer.OnFirstFrameRenderedListener;
 import io.flutter.plugin.platform.PlatformPlugin;
 
 public class BoostFlutterView extends FrameLayout {
 
-    private FlutterEngine mFlutterEngine;
+    private BoostFlutterEngine mFlutterEngine;
 
     private FlutterView mFlutterView;
 
@@ -49,24 +57,35 @@ public class BoostFlutterView extends FrameLayout {
 
     private Bundle mArguments;
 
-    private BoostPluginRegistry mBoostPluginRegistry;
+    private RenderingProgressCoverCreator mRenderingProgressCoverCreator;
+
+    private View mRenderingProgressCover;
 
     private final List<OnFirstFrameRenderedListener> mFirstFrameRenderedListeners = new LinkedList<>();
 
-    private final OnFirstFrameRenderedListener mOnFirstFrameRenderedListener = new OnFirstFrameRenderedListener() {
+    private boolean mNeedSnapshotWhenDetach = true;
+
+    private ImageView mSnapshot;
+
+    private final io.flutter.embedding.engine.renderer.OnFirstFrameRenderedListener mOnFirstFrameRenderedListener =
+            new io.flutter.embedding.engine.renderer.OnFirstFrameRenderedListener() {
         @Override
         public void onFirstFrameRendered() {
+            if(mRenderingProgressCover != null && mRenderingProgressCover.getParent() != null) {
+                ((ViewGroup)mRenderingProgressCover.getParent()).removeView(mRenderingProgressCover);
+            }
             final Object[] listeners = mFirstFrameRenderedListeners.toArray();
             for (Object obj : listeners) {
-                ((OnFirstFrameRenderedListener) obj).onFirstFrameRendered();
+                ((OnFirstFrameRenderedListener) obj).onFirstFrameRendered(BoostFlutterView.this);
             }
         }
     };
 
-    public BoostFlutterView(Context context, FlutterEngine engine, Bundle args) {
+    public BoostFlutterView(Context context, BoostFlutterEngine engine, Bundle args, RenderingProgressCoverCreator creator) {
         super(context);
         mFlutterEngine = engine;
         mArguments = args;
+        mRenderingProgressCoverCreator = creator;
         init();
     }
 
@@ -85,14 +104,63 @@ public class BoostFlutterView extends FrameLayout {
         addView(mFlutterView, new FrameLayout.LayoutParams(
                 ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));
 
+        if(mRenderingProgressCoverCreator != null) {
+            mRenderingProgressCover = mRenderingProgressCoverCreator
+                    .createRenderingProgressCover(getContext());
+        }else{
+            mRenderingProgressCover = createRenderingProgressCorver();
+        }
+
+        if(mRenderingProgressCover != null) {
+            addView(mRenderingProgressCover, new FrameLayout.LayoutParams(
+                    ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));
+        }
+
+        mSnapshot = new ImageView(getContext());
+        FrameLayout.LayoutParams params = new FrameLayout.LayoutParams(
+                ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);
+        params.gravity = Gravity.CENTER;
+        mSnapshot.setLayoutParams(params);
+
         mFlutterView.addOnFirstFrameRenderedListener(mOnFirstFrameRenderedListener);
 
-        mBoostPluginRegistry = new BoostPluginRegistry(mFlutterEngine,(Activity)getContext());
-        FlutterBoostPlugin.platform().onRegisterPlugins(mBoostPluginRegistry);
+        mFlutterEngine.startRun((Activity)getContext());
+
+        final IStateListener stateListener = FlutterBoostPlugin.sInstance.mStateListener;
+        if(stateListener != null) {
+            stateListener.onFlutterViewInited(mFlutterEngine,this);
+        }
     }
 
-    protected FlutterEngine createFlutterEngine(Context context) {
-        return BoostEngineProvider.sInstance.createEngine(context);
+    protected View createRenderingProgressCorver(){
+        FrameLayout frameLayout = new FrameLayout(getContext());
+        frameLayout.setBackgroundColor(Color.WHITE);
+
+        LinearLayout linearLayout = new LinearLayout(getContext());
+        linearLayout.setOrientation(LinearLayout.VERTICAL);
+        FrameLayout.LayoutParams layoutParams = new FrameLayout.LayoutParams(
+                ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
+        layoutParams.gravity = Gravity.CENTER;
+        frameLayout.addView(linearLayout,layoutParams);
+
+        ProgressBar progressBar = new ProgressBar(getContext());
+        LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
+                ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
+        params.gravity = Gravity.CENTER_HORIZONTAL;
+        linearLayout.addView(progressBar,params);
+
+        TextView textView = new TextView(getContext());
+        params = new LinearLayout.LayoutParams(
+                ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
+        params.gravity = Gravity.CENTER_HORIZONTAL;
+        textView.setText("Frame Rendering...");
+        linearLayout.addView(textView,params);
+
+        return frameLayout;
+    }
+
+    protected BoostFlutterEngine createFlutterEngine(Context context) {
+        return FlutterBoostPlugin.singleton().engineProvider().createEngine(context);
     }
 
     public void addFirstFrameRendered(OnFirstFrameRenderedListener listener) {
@@ -119,6 +187,11 @@ public class BoostFlutterView extends FrameLayout {
     protected void onAttachedToWindow() {
         super.onAttachedToWindow();
         mPlatformPlugin.onPostResume();
+        ViewCompat.requestApplyInsets(this);
+    }
+
+    public BoostFlutterEngine getEngine(){
+        return mFlutterEngine;
     }
 
     public void onResume() {
@@ -143,13 +216,32 @@ public class BoostFlutterView extends FrameLayout {
 
     public void onAttach() {
         Debuger.log("BoostFlutterView onAttach");
+        final IStateListener stateListener = FlutterBoostPlugin.sInstance.mStateListener;
+        if(stateListener != null) {
+            stateListener.beforeEngineAttach(mFlutterEngine,this);
+        }
         mFlutterView.attachToFlutterEngine(mFlutterEngine);
+        if(stateListener != null) {
+            stateListener.afterEngineAttached(mFlutterEngine,this);
+        }
     }
 
     public void onDetach() {
         Debuger.log("BoostFlutterView onDetach");
+
+        if(mNeedSnapshotWhenDetach) {
+            //mFlutterView.
+        }
+
         mFlutterView.removeOnFirstFrameRenderedListener(mOnFirstFrameRenderedListener);
+        final IStateListener stateListener = FlutterBoostPlugin.sInstance.mStateListener;
+        if(stateListener != null) {
+            stateListener.beforeEngineDetach(mFlutterEngine,this);
+        }
         mFlutterView.detachFromFlutterEngine();
+        if(stateListener != null) {
+            stateListener.afterEngineDetached(mFlutterEngine,this);
+        }
     }
 
     public void onDestroy() {
@@ -226,9 +318,10 @@ public class BoostFlutterView extends FrameLayout {
 
     public static class Builder {
         private Context context;
-        private FlutterEngine engine;
+        private BoostFlutterEngine engine;
         private FlutterView.RenderMode renderMode;
         private FlutterView.TransparencyMode transparencyMode;
+        private RenderingProgressCoverCreator renderingProgressCoverCreator;
 
         public Builder(Context ctx) {
             this.context = ctx;
@@ -236,7 +329,7 @@ public class BoostFlutterView extends FrameLayout {
             transparencyMode = FlutterView.TransparencyMode.transparent;
         }
 
-        public Builder flutterEngine(FlutterEngine engine) {
+        public Builder flutterEngine(BoostFlutterEngine engine) {
             this.engine = engine;
             return this;
         }
@@ -247,6 +340,10 @@ public class BoostFlutterView extends FrameLayout {
             return this;
         }
 
+        public Builder renderingProgressCoverCreator(RenderingProgressCoverCreator creator) {
+            this.renderingProgressCoverCreator = creator;
+            return this;
+        }
 
         public Builder transparencyMode(FlutterView.TransparencyMode transparencyMode) {
             this.transparencyMode = transparencyMode;
@@ -258,7 +355,15 @@ public class BoostFlutterView extends FrameLayout {
             args.putString("flutterview_render_mode", renderMode != null ? renderMode.name() : FlutterView.RenderMode.surface.name());
             args.putString("flutterview_transparency_mode", transparencyMode != null ? transparencyMode.name() : FlutterView.TransparencyMode.transparent.name());
 
-            return new BoostFlutterView(context, engine, args);
+            return new BoostFlutterView(context, engine, args,renderingProgressCoverCreator);
         }
     }
+
+    public interface OnFirstFrameRenderedListener {
+        void onFirstFrameRendered(BoostFlutterView view);
+    }
+
+    public interface RenderingProgressCoverCreator {
+        View createRenderingProgressCover(Context context);
+    }
 }

android/src/main/java/com/taobao/idlefish/flutterboost/ContainerRecord.java

@@ -66,6 +66,7 @@ public class ContainerRecord implements IContainerRecord {
     @Override
     public void onCreate() {
         Utils.assertCallOnMainThread();
+        BoostEngineProvider.assertEngineRunning();
 
         if(mState != STATE_UNKNOW) {
             Debuger.exception("state error");

android/src/main/java/com/taobao/idlefish/flutterboost/Debuger.java

@@ -60,7 +60,7 @@ public class Debuger {
 
     public static boolean isDebug(){
         try {
-            return FlutterBoostPlugin.platform().isDebug();
+            return FlutterBoostPlugin.singleton().platform().isDebug();
         }catch (Throwable t){
             return false;
         }

android/src/main/java/com/taobao/idlefish/flutterboost/FlutterViewContainerManager.java

@@ -52,8 +52,6 @@ public class FlutterViewContainerManager implements IContainerManager {
     public IOperateSyncer generateSyncer(IFlutterViewContainer container) {
         Utils.assertCallOnMainThread();
 
-        BoostEngineProvider.sInstance.createEngine(container.getContextActivity());
-
         ContainerRecord record = new ContainerRecord(this, container);
         if (mRecordMap.put(container, record) != null) {
             Debuger.exception("container:" + container.getContainerName() + " already exists!");
@@ -64,7 +62,7 @@ public class FlutterViewContainerManager implements IContainerManager {
         return record;
     }
 
-    public void pushRecord(IContainerRecord record) {
+    void pushRecord(IContainerRecord record) {
         if(!mRecordMap.containsValue(record)) {
             Debuger.exception("invalid record!");
         }
@@ -72,13 +70,13 @@ public class FlutterViewContainerManager implements IContainerManager {
         mRecordStack.push(record);
     }
 
-    public void popRecord(IContainerRecord record) {
+    void popRecord(IContainerRecord record) {
         if(mRecordStack.peek() == record) {
             mRecordStack.pop();
         }
     }
 
-    public void removeRecord(IContainerRecord record) {
+    void removeRecord(IContainerRecord record) {
         mRecordStack.remove(record);
         mRecordMap.remove(record.getContainer());
     }

android/src/main/java/com/taobao/idlefish/flutterboost/NavigationService/NavigationService_closePage.java

@@ -25,7 +25,6 @@
  package com.taobao.idlefish.flutterboost.NavigationService;
  
  import com.taobao.idlefish.flutterboost.FlutterBoostPlugin;
- import com.taobao.idlefish.flutterboost.FlutterViewContainerManager;
 
  import java.util.ArrayList;
  import java.util.List;
@@ -39,7 +38,7 @@
  
  
         private boolean onCall(MessageResult<Boolean> result,String uniqueId,String pageName,Map params,Boolean animated){
-            FlutterBoostPlugin.containerManager().closeContainer(uniqueId,null);
+            FlutterBoostPlugin.singleton().containerManager().closeContainer(uniqueId,null);
             result.success(true);
             return true;
       }

android/src/main/java/com/taobao/idlefish/flutterboost/NavigationService/NavigationService_onFlutterPageResult.java

@@ -24,8 +24,6 @@
 
  package com.taobao.idlefish.flutterboost.NavigationService;
  
- import com.taobao.idlefish.flutterboost.FlutterBoostPlugin;
-
  import java.util.ArrayList;
  import java.util.List;
  import java.util.Map;

android/src/main/java/com/taobao/idlefish/flutterboost/NavigationService/NavigationService_onShownContainerChanged.java

@@ -24,7 +24,6 @@
 
  package com.taobao.idlefish.flutterboost.NavigationService;
  
- import com.taobao.idlefish.flutterboost.Debuger;
  import com.taobao.idlefish.flutterboost.FlutterBoostPlugin;
 
  import java.util.ArrayList;
@@ -40,7 +39,7 @@
  
         private boolean onCall(MessageResult<Boolean> result,String now,String old,Map params){
              //Add your handler code here.
-            FlutterBoostPlugin.containerManager().onShownContainerChanged(old,now);
+            FlutterBoostPlugin.singleton().containerManager().onShownContainerChanged(old,now);
            return true;
       }
  

android/src/main/java/com/taobao/idlefish/flutterboost/NavigationService/NavigationService_openPage.java

@@ -24,6 +24,8 @@
 
  package com.taobao.idlefish.flutterboost.NavigationService;
  
+ import android.content.Context;
+
  import com.taobao.idlefish.flutterboost.FlutterBoostPlugin;
 
  import java.util.ArrayList;
@@ -44,7 +46,13 @@
              requestCode = (int) params.get("requestCode");
          }
 
-         FlutterBoostPlugin.openPage(null,pageName,params,0);
+         Context ctx = FlutterBoostPlugin.singleton().currentActivity();
+
+         if (ctx == null) {
+             ctx = FlutterBoostPlugin.singleton().platform().getApplication();
+         }
+
+         FlutterBoostPlugin.singleton().platform().startActivity(ctx, pageName ,params, requestCode);
 
          if(result != null){
              result.success(true);

android/src/main/java/com/taobao/idlefish/flutterboost/NavigationService/NavigationService_pageOnStart.java

@@ -25,9 +25,7 @@
  package com.taobao.idlefish.flutterboost.NavigationService;
  
  import com.taobao.idlefish.flutterboost.FlutterBoostPlugin;
- import com.taobao.idlefish.flutterboost.FlutterViewContainerManager;
  import com.taobao.idlefish.flutterboost.interfaces.IContainerRecord;
- import com.taobao.idlefish.flutterboost.interfaces.IFlutterViewContainer;
 
  import java.util.ArrayList;
  import java.util.HashMap;
@@ -44,11 +42,11 @@
             Map<String,Object> pageInfo = new HashMap<>();
 
             try {
-                IContainerRecord record = FlutterBoostPlugin
+                IContainerRecord record = FlutterBoostPlugin.singleton()
                         .containerManager().getCurrentTopRecord();
 
                 if(record == null) {
-                    record = FlutterBoostPlugin.containerManager().getLastGenerateRecord();
+                    record = FlutterBoostPlugin.singleton().containerManager().getLastGenerateRecord();
                 }
 
                 pageInfo.put("name",record.getContainer().getContainerName());

android/src/main/java/com/taobao/idlefish/flutterboost/PageResultHandler.java

-/*
- * The MIT License (MIT)
- * 
- * Copyright (c) 2019 Alibaba Group
- * 
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- * 
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- * 
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
-package com.taobao.idlefish.flutterboost;
-
-import java.util.Map;
-
-public interface PageResultHandler {
-    void onResult(String key , Map resultData);
-}

android/src/main/java/com/taobao/idlefish/flutterboost/PageResultMediator.java

-/*
- * The MIT License (MIT)
- * 
- * Copyright (c) 2019 Alibaba Group
- * 
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- * 
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- * 
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
-package com.taobao.idlefish.flutterboost;
-
-import com.taobao.idlefish.flutterboost.NavigationService.NavigationService;
-
-import java.util.HashMap;
-import java.util.Map;
-
-import fleamarket.taobao.com.xservicekit.handler.MessageResult;
-
-class PageResultMediator {
-
-    private Map<String,PageResultHandler> _handlers = new HashMap<>();
-
-    void onPageResult(String key , Map resultData,Map params){
-        if(key == null) return;
-
-        if(_handlers.containsKey(key)){
-            _handlers.get(key).onResult(key,resultData);
-            _handlers.remove(key);
-        }else{
-
-            if(params == null || !params.containsKey("forward")){
-                if(params == null){
-                    params = new HashMap();
-                }
-
-                params.put("forward",1);
-                NavigationService.onNativePageResult(new MessageResult<Boolean>() {
-                    @Override
-                    public void success(Boolean var1) {
-
-                    }
-
-                    @Override
-                    public void error(String var1, String var2, Object var3) {
-
-                    }
-
-                    @Override
-                    public void notImplemented() {
-
-                    }
-                },key,key,resultData,params);
-            }else{
-                int forward = (Integer) params.get("forward");
-                params.put("forward",++forward);
-                if(forward <= 2){
-                    NavigationService.onNativePageResult(new MessageResult<Boolean>() {
-                        @Override
-                        public void success(Boolean var1) {
-
-                        }
-
-                        @Override
-                        public void error(String var1, String var2, Object var3) {
-
-                        }
-
-                        @Override
-                        public void notImplemented() {
-
-                        }
-                    },key,key,resultData,params);
-                }
-            }
-        }
-    }
-
-    void setHandler(String key, PageResultHandler handler){
-        if(key == null || handler == null) return;
-        _handlers.put(key,handler);
-    }
-
-    void removeHandler(String key){
-        if(key == null) return;;
-        _handlers.remove(key);
-    }
-
-}

android/src/main/java/com/taobao/idlefish/flutterboost/StateListener.java

+package com.taobao.idlefish.flutterboost;
+
+import com.taobao.idlefish.flutterboost.interfaces.IStateListener;
+
+public class StateListener implements IStateListener {
+    @Override
+    public void onEngineCreated(BoostFlutterEngine engine) {
+        Debuger.log(">>onEngineCreated");
+    }
+
+    @Override
+    public void onEngineStarted(BoostFlutterEngine engine) {
+        Debuger.log(">>onEngineStarted");
+    }
+
+    @Override
+    public void onFlutterViewInited(BoostFlutterEngine engine, BoostFlutterView flutterView) {
+        Debuger.log(">>onFlutterViewInited");
+    }
+
+    @Override
+    public void beforeEngineAttach(BoostFlutterEngine engine, BoostFlutterView flutterView) {
+        Debuger.log(">>beforeEngineAttach");
+    }
+
+    @Override
+    public void afterEngineAttached(BoostFlutterEngine engine, BoostFlutterView flutterView) {
+        Debuger.log(">>afterEngineAttached");
+    }
+
+    @Override
+    public void beforeEngineDetach(BoostFlutterEngine engine, BoostFlutterView flutterView) {
+        Debuger.log(">>beforeEngineDetach");
+    }
+
+    @Override
+    public void afterEngineDetached(BoostFlutterEngine engine, BoostFlutterView flutterView) {
+        Debuger.log(">>afterEngineDetached");
+    }
+}

android/src/main/java/com/taobao/idlefish/flutterboost/containers/BoostFlutterActivity.java

@@ -24,9 +24,23 @@
 package com.taobao.idlefish.flutterboost.containers;
 
 import android.app.Activity;
+import android.content.Context;
 import android.content.Intent;
+import android.graphics.Color;
+import android.graphics.drawable.ColorDrawable;
+import android.os.Build;
 import android.os.Bundle;
-
+import android.view.Gravity;
+import android.view.View;
+import android.view.ViewGroup;
+import android.view.Window;
+import android.view.WindowManager;
+import android.widget.FrameLayout;
+import android.widget.LinearLayout;
+import android.widget.ProgressBar;
+import android.widget.TextView;
+
+import com.taobao.idlefish.flutterboost.BoostFlutterEngine;
 import com.taobao.idlefish.flutterboost.BoostFlutterView;
 import com.taobao.idlefish.flutterboost.FlutterBoostPlugin;
 import com.taobao.idlefish.flutterboost.interfaces.IFlutterViewContainer;
@@ -35,25 +49,101 @@ import com.taobao.idlefish.flutterboost.interfaces.IOperateSyncer;
 import java.util.HashMap;
 
 import io.flutter.embedding.android.FlutterView;
+import io.flutter.plugin.platform.PlatformPlugin;
 
 public abstract class BoostFlutterActivity extends Activity implements IFlutterViewContainer {
 
-    private BoostFlutterView mFlutterView;
-    private IOperateSyncer mSyncer;
+    protected BoostFlutterEngine mFlutterEngine;
+    protected BoostFlutterView mFlutterView;
+    protected IOperateSyncer mSyncer;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
 
-        BoostFlutterView.Builder builder = new BoostFlutterView.Builder(this);
-        mFlutterView = builder.renderMode(FlutterView.RenderMode.texture)
-                .transparencyMode(FlutterView.TransparencyMode.opaque)
-                .build();
+        configureWindowForTransparency();
+
+        mSyncer = FlutterBoostPlugin.singleton().containerManager().generateSyncer(this);
+
+
+        mFlutterEngine = createFlutterEngine();
+        mFlutterView = createFlutterView(mFlutterEngine);
 
         setContentView(mFlutterView);
 
-        mSyncer = FlutterBoostPlugin.containerManager().generateSyncer(this);
         mSyncer.onCreate();
+
+        configureStatusBarForFullscreenFlutterExperience();
+    }
+
+    protected void configureWindowForTransparency() {
+        if (isBackgroundTransparent()) {
+            getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
+            getWindow().setFlags(
+                    WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS,
+                    WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS
+            );
+        }
+    }
+
+    protected void configureStatusBarForFullscreenFlutterExperience() {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
+            Window window = getWindow();
+            window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
+            window.setStatusBarColor(0x40000000);
+            window.getDecorView().setSystemUiVisibility(PlatformPlugin.DEFAULT_SYSTEM_UI);
+        }
+    }
+
+    protected BoostFlutterEngine createFlutterEngine(){
+        return FlutterBoostPlugin.singleton().engineProvider().createEngine(this);
+    }
+
+    protected BoostFlutterView createFlutterView(BoostFlutterEngine engine){
+        BoostFlutterView.Builder builder = new BoostFlutterView.Builder(this);
+
+        return builder.flutterEngine(engine)
+                .renderMode(FlutterView.RenderMode.texture)
+                .transparencyMode(isBackgroundTransparent() ?
+                        FlutterView.TransparencyMode.transparent :
+                        FlutterView.TransparencyMode.opaque)
+                .renderingProgressCoverCreator(new BoostFlutterView.RenderingProgressCoverCreator() {
+                    @Override
+                    public View createRenderingProgressCover(Context context) {
+                        return BoostFlutterActivity.this.createRenderingProgressCover();
+                    }
+                })
+                .build();
+    }
+
+    protected boolean isBackgroundTransparent(){
+        return false;
+    }
+
+    protected View createRenderingProgressCover(){
+        FrameLayout frameLayout = new FrameLayout(this);
+
+        LinearLayout linearLayout = new LinearLayout(this);
+        linearLayout.setOrientation(LinearLayout.VERTICAL);
+        FrameLayout.LayoutParams layoutParams = new FrameLayout.LayoutParams(
+                ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
+        layoutParams.gravity = Gravity.CENTER;
+        frameLayout.addView(linearLayout,layoutParams);
+
+        ProgressBar progressBar = new ProgressBar(this);
+        LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
+                ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
+        params.gravity = Gravity.CENTER_HORIZONTAL;
+        linearLayout.addView(progressBar,params);
+
+        TextView textView = new TextView(this);
+        params = new LinearLayout.LayoutParams(
+                ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
+        params.gravity = Gravity.CENTER_HORIZONTAL;
+        textView.setText("Frame Rendering...");
+        linearLayout.addView(textView,params);
+
+        return frameLayout;
     }
 
     @Override

android/src/main/java/com/taobao/idlefish/flutterboost/containers/BoostFlutterFragment.java

@@ -32,6 +32,7 @@ import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 
+import com.taobao.idlefish.flutterboost.BoostFlutterEngine;
 import com.taobao.idlefish.flutterboost.BoostFlutterView;
 import com.taobao.idlefish.flutterboost.FlutterBoostPlugin;
 import com.taobao.idlefish.flutterboost.interfaces.IFlutterViewContainer;
@@ -43,23 +44,36 @@ import io.flutter.embedding.android.FlutterView;
 
 abstract public class BoostFlutterFragment extends Fragment implements IFlutterViewContainer {
 
-    private BoostFlutterView mFlutterView;
-    private IOperateSyncer mSyncer;
+    protected BoostFlutterEngine mFlutterEngine;
+    protected BoostFlutterView mFlutterView;
+    protected IOperateSyncer mSyncer;
 
     @Nullable
     @Override
     public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
-        BoostFlutterView.Builder builder = new BoostFlutterView.Builder(getContextActivity());
-        mFlutterView = builder.renderMode(FlutterView.RenderMode.texture)
-                .transparencyMode(FlutterView.TransparencyMode.opaque)
-                .build();
+        mSyncer = FlutterBoostPlugin.singleton().containerManager().generateSyncer(this);
+
+        mFlutterEngine = createFlutterEngine();
+        mFlutterView = createFlutterView(mFlutterEngine);
 
-        mSyncer = FlutterBoostPlugin.containerManager().generateSyncer(this);
         mSyncer.onCreate();
 
         return mFlutterView;
     }
 
+    protected BoostFlutterEngine createFlutterEngine(){
+        return FlutterBoostPlugin.singleton().engineProvider().createEngine(getContext());
+    }
+
+    protected BoostFlutterView createFlutterView(BoostFlutterEngine engine){
+        BoostFlutterView.Builder builder = new BoostFlutterView.Builder(getContextActivity());
+
+        return builder.flutterEngine(engine)
+                .renderMode(FlutterView.RenderMode.texture)
+                .transparencyMode(FlutterView.TransparencyMode.opaque)
+                .build();
+    }
+
     @Override
     public void onResume() {
         super.onResume();

android/src/main/java/com/taobao/idlefish/flutterboost/interfaces/IFlutterEngineProvider.java

@@ -25,6 +25,7 @@ package com.taobao.idlefish.flutterboost.interfaces;
 
 import android.content.Context;
 
+import com.taobao.idlefish.flutterboost.BoostFlutterEngine;
 import com.taobao.idlefish.flutterboost.BoostFlutterView;
 
 import io.flutter.embedding.engine.FlutterEngine;
@@ -38,11 +39,11 @@ public interface IFlutterEngineProvider {
      * @param context
      * @return
      */
-    FlutterEngine createEngine(Context context);
+    BoostFlutterEngine createEngine(Context context);
 
     /**
      * may return null
      * @return
      */
-    FlutterEngine tryGetEngine();
+    BoostFlutterEngine tryGetEngine();
 }

android/src/main/java/com/taobao/idlefish/flutterboost/interfaces/IPlatform.java

@@ -23,7 +23,6 @@
  */
 package com.taobao.idlefish.flutterboost.interfaces;
 
-import android.app.Activity;
 import android.app.Application;
 import android.content.Context;
 
@@ -36,6 +35,10 @@ import io.flutter.plugin.common.PluginRegistry;
  */
 public interface IPlatform {
 
+    int IMMEDIATELY = 0;          //立即启动引擎
+    int ANY_ACTIVITY_CREATED = 1; //当有任何Activity创建时,启动引擎
+    int LAZY = 2;                 //尽可能延后启动引擎(通常是首页Flutter页面加载时)
+
     /**
      * get current application
      * @return
@@ -43,16 +46,16 @@ public interface IPlatform {
     Application getApplication();
 
     /**
-     * register plugins
+     * debug or not
      * @return
      */
-    void onRegisterPlugins(PluginRegistry registry);
+    boolean isDebug();
 
     /**
-     * debug or not
+     * register plugins
      * @return
      */
-    boolean isDebug();
+    void onRegisterPlugins(PluginRegistry registry);
 
     /**
      * start a new activity from flutter page, you may need a page router with url
@@ -65,8 +68,11 @@ public interface IPlatform {
 
 
     /**
-     * settings, no use
      * @return
+     *
+     *  IMMEDIATELY           //立即
+     *  ANY_ACTIVITY_CREATED  //当有任何Activity创建的时候
+     *  LAZY                  //懒加载，尽可能延后
      */
-    Map getSettings();
+    int whenEngineStart();
 }

android/src/main/java/com/taobao/idlefish/flutterboost/interfaces/IStateListener.java

+package com.taobao.idlefish.flutterboost.interfaces;
+
+import com.taobao.idlefish.flutterboost.BoostFlutterEngine;
+import com.taobao.idlefish.flutterboost.BoostFlutterView;
+
+public interface IStateListener {
+    void onEngineCreated(BoostFlutterEngine engine);
+    void onEngineStarted(BoostFlutterEngine engine);
+    void onFlutterViewInited(BoostFlutterEngine engine, BoostFlutterView flutterView);
+    void beforeEngineAttach(BoostFlutterEngine engine, BoostFlutterView flutterView);
+    void afterEngineAttached(BoostFlutterEngine engine, BoostFlutterView flutterView);
+    void beforeEngineDetach(BoostFlutterEngine engine, BoostFlutterView flutterView);
+    void afterEngineDetached(BoostFlutterEngine engine, BoostFlutterView flutterView);
+}

example/android/app/src/main/java/com/taobao/idlefish/flutterboostexample/FlutterFragmentPageActivity.java

 package com.taobao.idlefish.flutterboostexample;
 
+import android.graphics.Color;
 import android.os.Build;
 import android.os.Bundle;
 import android.support.annotation.Nullable;
 import android.support.v7.app.ActionBar;
 import android.support.v7.app.AppCompatActivity;
+import android.view.View;
 import android.view.Window;
 import android.view.WindowManager;
 
 import io.flutter.plugin.platform.PlatformPlugin;
 
-public class FlutterFragmentPageActivity extends AppCompatActivity {
+public class FlutterFragmentPageActivity extends AppCompatActivity implements View.OnClickListener {
 
     private FlutterFragment mFragment;
 
+    private View mTab1;
+    private View mTab2;
+    private View mTab3;
+    private View mTab4;
+
     @Override
     protected void onCreate(@Nullable Bundle savedInstanceState) {
         supportRequestWindowFeature(Window.FEATURE_NO_TITLE);
@@ -32,11 +39,49 @@ public class FlutterFragmentPageActivity extends AppCompatActivity {
 
         setContentView(R.layout.flutter_fragment_page);
 
-        mFragment = FlutterFragment.instance("hello");
+        mTab1 = findViewById(R.id.tab1);
+        mTab2 = findViewById(R.id.tab2);
+        mTab3 = findViewById(R.id.tab3);
+        mTab4 = findViewById(R.id.tab4);
+
+        mTab1.setOnClickListener(this);
+        mTab2.setOnClickListener(this);
+        mTab3.setOnClickListener(this);
+        mTab4.setOnClickListener(this);
+
+    }
+
+    @Override
+    public void onClick(View v) {
+
+        mTab1.setBackgroundColor(Color.WHITE);
+        mTab2.setBackgroundColor(Color.WHITE);
+        mTab3.setBackgroundColor(Color.WHITE);
+        mTab4.setBackgroundColor(Color.WHITE);
+
+        if(mTab1 == v) {
+            mTab1.setBackgroundColor(Color.YELLOW);
+            mFragment = FlutterFragment.instance("tab1");
+        }else if(mTab2 == v) {
+            mTab2.setBackgroundColor(Color.YELLOW);
+            mFragment = FlutterFragment.instance("tab2");
+        }else if(mTab3 == v) {
+            mTab3.setBackgroundColor(Color.YELLOW);
+           mFragment = FlutterFragment.instance("tab3");
+        }else{
+            mTab4.setBackgroundColor(Color.YELLOW);
+            mFragment = FlutterFragment.instance("tab4");
+        }
 
         getSupportFragmentManager()
                 .beginTransaction()
                 .replace(R.id.fragment_stub,mFragment)
                 .commit();
     }
+
+    @Override
+    protected void onResume() {
+        super.onResume();
+        mTab1.performClick();
+    }
 }

example/android/app/src/main/java/com/taobao/idlefish/flutterboostexample/FlutterPageActivity.java

@@ -15,7 +15,7 @@ public class FlutterPageActivity extends BoostFlutterActivity {
      * 混合栈将会在flutter层根据这个名字，在注册的Route表中查找对应的Widget
      *
      * 在flutter层有注册函数：
-     *     FlutterBoost.singleton.registerPageBuilders({
+     *     FlutterBoostPlugin.singleton.registerPageBuilders({
      *       'first': (pageName, params, _) => FirstRouteWidget(),
      *       'second': (pageName, params, _) => SecondRouteWidget(),
      *       ...
@@ -34,7 +34,7 @@ public class FlutterPageActivity extends BoostFlutterActivity {
      * 该方法返回的参数将会传递给上层的flutter对应的Widget
      *
      * 在flutter层有注册函数：
-     *    FlutterBoost.singleton.registerPageBuilders({
+     *    FlutterBoostPlugin.singleton.registerPageBuilders({
      *       'first': (pageName, params, _) => FirstRouteWidget(),
      *       'second': (pageName, params, _) => SecondRouteWidget(),
      *        ...

example/android/app/src/main/java/com/taobao/idlefish/flutterboostexample/MainActivity.java

@@ -6,8 +6,6 @@ import android.support.v7.app.AppCompatActivity;
 import android.view.View;
 import android.widget.TextView;
 
-import com.taobao.idlefish.flutterboost.FlutterBoostPlugin;
-
 import java.lang.ref.WeakReference;
 import java.util.HashMap;
 import java.util.Map;
@@ -52,7 +50,6 @@ public class MainActivity extends AppCompatActivity implements View.OnClickListe
             PageRouter.openPageByUrl(this, PageRouter.NATIVE_PAGE_URL , params);
         } else if (v == mOpenFlutter) {
             PageRouter.openPageByUrl(this, PageRouter.FLUTTER_PAGE_URL,params);
-            FlutterBoostPlugin.onPageResult("result_id_100",new HashMap(),new HashMap());
         } else if (v == mOpenFlutterFragment) {
             PageRouter.openPageByUrl(this, PageRouter.FLUTTER_FRAGMENT_PAGE_URL,params);
         }

example/android/app/src/main/java/com/taobao/idlefish/flutterboostexample/MyApplication.java

@@ -3,9 +3,13 @@ package com.taobao.idlefish.flutterboostexample;
 import android.app.Application;
 import android.content.Context;
 
+import com.taobao.idlefish.flutterboost.BoostFlutterEngine;
+import com.taobao.idlefish.flutterboost.BoostFlutterView;
 import com.taobao.idlefish.flutterboost.Debuger;
 import com.taobao.idlefish.flutterboost.FlutterBoostPlugin;
+import com.taobao.idlefish.flutterboost.StateListener;
 import com.taobao.idlefish.flutterboost.interfaces.IPlatform;
+import com.taobao.idlefish.flutterboost.interfaces.IStateListener;
 
 import java.util.Map;
 
@@ -54,8 +58,8 @@ public class MyApplication extends FlutterApplication {
             }
 
             @Override
-            public Map getSettings() {
-                return null;
+            public int whenEngineStart() {
+                return IMMEDIATELY;
             }
         });
     }

example/android/app/src/main/res/layout/flutter_fragment_page.xml

@@ -11,4 +11,47 @@
         android:layout_weight="1"
         android:id="@+id/fragment_stub"/>
 
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="horizontal">
+
+        <TextView
+            android:layout_width="0dp"
+            android:layout_height="56dp"
+            android:text="tab1"
+            android:id="@+id/tab1"
+            android:gravity="center"
+            android:textColor="@android:color/background_dark"
+            android:layout_weight="1"/>
+
+        <TextView
+            android:layout_width="0dp"
+            android:layout_height="56dp"
+            android:text="tab2"
+            android:id="@+id/tab2"
+            android:gravity="center"
+            android:textColor="@android:color/background_dark"
+            android:layout_weight="1"/>
+
+        <TextView
+            android:layout_width="0dp"
+            android:layout_height="56dp"
+            android:text="tab3"
+            android:id="@+id/tab3"
+            android:gravity="center"
+            android:textColor="@android:color/background_dark"
+            android:layout_weight="1"/>
+
+        <TextView
+            android:layout_width="0dp"
+            android:layout_height="56dp"
+            android:text="tab4"
+            android:id="@+id/tab4"
+            android:gravity="center"
+            android:textColor="@android:color/background_dark"
+            android:layout_weight="1"/>
+
+    </LinearLayout>
+
 </LinearLayout>