android framework中contexwrapper和contextimpl的关联过程（基于Android 5.1）

我们都知道，contexwrapper是contextimpl的代理类，那么它是在哪里把contextimpl和contextwrapper绑定在一起的呢，如下为调用过程：

LoadedApk.java:

ContextImpl appContext = ContextImpl.createAppContext(mActivityThread, this);app = mActivityThread.mInstrumentation.newApplication(cl, appClass, appContext);

Instrumentation.java:

public Application newApplication(ClassLoader cl, String className, Context context)            throws InstantiationException, IllegalAccessException,             ClassNotFoundException {        return newApplication(cl.loadClass(className), context);}

Instrumentation.java:

static public Application newApplication(Class<?> clazz, Context context)            throws InstantiationException, IllegalAccessException, ClassNotFoundException {        Application app = (Application)clazz.newInstance();        app.attach(context);        return app;}

Application.java:

/** * @hide */* package */ final void attach(Context context) {        attachBaseContext(context);//这里就是关联的地方，把ContextImpl的context实例传递进attachBaseContext里面        mLoadedApk = ContextImpl.getImpl(context).mPackageInfo;}attachBaseContext做的事情：ContextWrapper.java:protected void attachBaseContext(Context base) {        if (mBase != null) {            throw new IllegalStateException("Base context already set");        }        mBase = base;}//contextimpl的实例就传递给contextwrapper的mBase了，绑定完成。

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