插件化技术的演进之路

......
 <activity
            android:name=".stub.ActivityStub$P00$Standard00"
            android:allowTaskReparenting="true"
            android:excludeFromRecents="true"
            android:exported="false"
            android:hardwareAccelerated="true"
            android:label="@string/stub_name_activity"
            android:launchMode="standard"
            android:noHistory="true"
            android:theme="@style/DroidPluginTheme">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="com.morgoo.droidplugin.category.PROXY_STUB" />
            </intent-filter>
            <meta-data
                android:name="com.morgoo.droidplugin.ACTIVITY_STUB_INDEX"
                android:value="0" />
        </activity>
        <activity
            android:name=".stub.ActivityStub$P00$SingleInstance00"
            android:allowTaskReparenting="true"
            android:excludeFromRecents="true"
            android:exported="false"
            android:hardwareAccelerated="true"
            android:label="@string/stub_name_activity"
            android:launchMode="singleInstance"
            android:theme="@style/DroidPluginTheme">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="com.morgoo.droidplugin.category.PROXY_STUB" />
            </intent-filter>
            <meta-data
                android:name="com.morgoo.droidplugin.ACTIVITY_STUB_INDEX"
                android:value="0" />
        </activity>
......

	static MyResources getResource(MyClassLoader mcl) {
        ......
		try {
			AssetManager am = (AssetManager) AssetManager.class.newInstance();
			am.getClass().getMethod("addAssetPath", String.class).invoke(am, path.getAbsolutePath());
			Resources superRes = MyApplication.instance().getResources();
			Resources res = new Resources(am, superRes.getDisplayMetrics(), superRes.getConfiguration());
            ......
        }

    public void dispatchProxyToPlugin() {
        try {
            //开始伪装插件为实体Activity
            pluginRef.set("mBase", proxy);
            pluginRef.set("mDecor", proxyRef.get("mDecor"));
            pluginRef.set("mTitleColor", proxyRef.get("mTitleColor"));
            ......
            Instrumentation instrumentation = proxyRef.get("mInstrumentation");
            pluginRef.set("mInstrumentation", new LPluginInsrument(instrumentation));
            ......
            pluginRef.set("mUiThread", proxyRef.get("mUiThread"));
            pluginRef.set("mHandler", proxyRef.get("mHandler"));
            pluginRef.set("mInstanceTracker", proxyRef.get("mInstanceTracker"));
            ......
        } catch (ReflectException e) {
            e.printStackTrace();
        }

    }

    /****
     *
     * public ActivityResult execStartActivity( Context who, IBinder
     * contextThread, IBinder token, Activity target, Intent intent, int
     * requestCode);
     * ***/
    public InstrumentationHook(Instrumentation instrumentation, Context context) {
        this.context = context;
        this.mBase = instrumentation;
        try {
            mInstrumentationInvoke = Hack.into("android.app.Instrumentation");
            if (Build.VERSION.SDK_INT > Build.VERSION_CODES.ICE_CREAM_SANDWICH_MR1) {
                mExecStartActivity = mInstrumentationInvoke.method("execStartActivity", Context.class,
                        IBinder.class, IBinder.class, Activity.class, Intent.class, int.class, Bundle.class);
            } else {
                mExecStartActivity = mInstrumentationInvoke.method("execStartActivity", Context.class,
                        IBinder.class, IBinder.class, Activity.class, Intent.class, int.class);
            }
            ......
        } catch (HackAssertionException e) {
            e.printStackTrace();
        } catch (IllegalArgumentException e) {
            e.printStackTrace();
        }
    }

        protected boolean doReplaceIntentForStartActivityAPIHigh(Object[] args) throws RemoteException {
            int intentOfArgIndex = findFirstIntentIndexInArgs(args);
            if (args != null && args.length > 1 && intentOfArgIndex >= 0) {
                Intent intent = (Intent) args[intentOfArgIndex];
                //XXX String callingPackage = (String) args[1];
                if (!PluginPatchManager.getInstance().canStartPluginActivity(intent)) {
                    PluginPatchManager.getInstance().startPluginActivity(intent);
                    return false;
                }
                ActivityInfo activityInfo = resolveActivity(intent);
                if (activityInfo != null && isPackagePlugin(activityInfo.packageName)) {
                    ComponentName component = selectProxyActivity(intent);
                    if (component != null) {
                        Intent newIntent = new Intent();
                        try {
                            ClassLoader pluginClassLoader = PluginProcessManager.getPluginClassLoader(component.getPackageName());
                            setIntentClassLoader(newIntent, pluginClassLoader);
                        } catch (Exception e) {
                            Log.w(TAG, "Set Class Loader to new Intent fail", e);
                        }
                        newIntent.setComponent(component);
                        newIntent.putExtra(Env.EXTRA_TARGET_INTENT, intent);
                        newIntent.setFlags(intent.getFlags());


                        String callingPackage = (String) args[1];
                        if (TextUtils.equals(mHostContext.getPackageName(), callingPackage)) {
                            newIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                        args[intentOfArgIndex] = newIntent;
                        args[1] = mHostContext.getPackageName();
                    } else {
                        Log.w(TAG, "startActivity,replace selectProxyActivity fail");
                    }
                }
            }

            return true;
        }

    @Override
    public boolean handleMessage(Message msg) {
        long b = System.currentTimeMillis();
        try {
            if (!mEnable) {
                return false;
            }

            if (PluginProcessManager.isPluginProcess(mHostContext)) {
                if (!PluginManager.getInstance().isConnected()) {
                    Log.i(TAG, "handleMessage not isConnected post and wait,msg=%s", msg);
                    mOldHandle.sendMessageDelayed(Message.obtain(msg), 5);
                    return true;
                }
            }

            if (msg.what == LAUNCH_ACTIVITY) {
                return handleLaunchActivity(msg);
            }
            if (mCallback != null) {
                return mCallback.handleMessage(msg);
            } else {
                return false;
            }
        } finally {
            Log.i(TAG, "handleMessage(%s,%s) cost %s ms", msg.what, codeToString(msg.what), (System.currentTimeMillis() - b));

        }
    }