android.view.Window#Callback ( )源码实例Demo

@Override
public void setContentView(int layoutResId) {
    if (ActionBarSherlock.DEBUG) Log.d(TAG, "[setContentView] layoutResId: " + layoutResId);

    if (mContentParent == null) {
        installDecor();
    } else {
        mContentParent.removeAllViews();
    }
    mActivity.getLayoutInflater().inflate(layoutResId, mContentParent);

    Window.Callback callback = mActivity.getWindow().getCallback();
    if (callback != null) {
        callback.onContentChanged();
    }

    initActionBar();
}
 

@Override
public void setContentView(View view, ViewGroup.LayoutParams params) {
    if (ActionBarSherlock.DEBUG) Log.d(TAG, "[setContentView] view: " + view + ", params: " + params);

    if (mContentParent == null) {
        installDecor();
    } else {
        mContentParent.removeAllViews();
    }
    mContentParent.addView(view, params);

    Window.Callback callback = mActivity.getWindow().getCallback();
    if (callback != null) {
        callback.onContentChanged();
    }

    initActionBar();
}
 

/**
 * 通过View获取Dialog
 */
private static Dialog getDialogFromView(View v) {
    Object result = callMethod(v, "getWindow");
    if (result instanceof Window) {
        Window window = (Window) result;
        Window.Callback callback = window.getCallback();
        if (callback instanceof Dialog) {
            return (Dialog) callback;
        }
    }
    return null;
}
 

/**
 * 替换WindowCallback
 *
 * @param activity Activity
 */
public static void replaceWindowCallback(Activity activity) {
    activity.getWindow().setCallback(activity);

    Window.Callback callback = activity.getWindow().getCallback();

    WindowCallbackWorker callbackWorker = new WindowCallbackWorker();
    callbackWorker.mTarget = callback;
    callbackWorker.mActivity = activity;

    activity.getWindow().setCallback(callbackWorker);
}
 

@SuppressWarnings("WeakerAccess")  // To maintain visibility compatibility with AppCompatActivity
public ActionBar getSupportActionBar() {
  Window.Callback classicCallback = getWindow().getCallback();
  try {
    return appCompatDelegate == null ? null : appCompatDelegate.getSupportActionBar();
  } catch (IllegalStateException e) {
    // Thrown in "Classic" mode
    appCompatDelegate = null;
    AppInventorCompatActivity.classicMode = true;
    getWindow().setCallback(classicCallback);
    return null;
  }
}
 

public static void attach(@NonNull Activity activity) {
    if (activity instanceof AppCompatActivity) {
        LayoutInflaterCompat.setFactory(activity.getLayoutInflater(),
                new RobotoInflater(((AppCompatActivity) activity).getDelegate(), activity.getWindow()));
    } else {
        final Window window = activity.getWindow();
        final Window.Callback callback = window.getCallback();
        LayoutInflaterCompat.setFactory(activity.getLayoutInflater(),
                new RobotoInflater(AppCompatDelegate.create(activity, StubAppCompatCallback.INSTANCE), window));
        window.setCallback(callback);
    }
}
 

@Override
public void onActivityCreated(Activity activity, Bundle savedInstanceState) {
    Window window = activity.getWindow();
    Window.Callback callback= window.getCallback();
    window.setCallback(new MonitorCallback(activity,callback));
}
 

MonitorCallback(Activity activity, Window.Callback callback){
    this.callback = callback;
    this.activity = activity;
}
 

public WindowCallbackProxy(Activity activity, Window.Callback callback) {
    mCallback = callback;
    mActivity = activity;
}
 

public MyWindowCallback(Window.Callback localCallback, Activity activity) {
    mLocalCallback = localCallback;
    mActivity = activity;
}
 

public WindowCallbackProxy(Activity activity, Window.Callback callback) {
    mCallback = callback;
    mActivity = activity;
}
 

public static Void windowCallback(Window.Callback arg) {
  return BaseDSL.attr("windowCallback", arg);
}