import android.support.v7.app.MediaRouteChooserDialogFragment; //导入依赖的package包/类
private void showMediaRouteDialog(MediaStateListener player, MediaRouteController controller,
        Activity activity) {

    FragmentManager fm = ((FragmentActivity) activity).getSupportFragmentManager();
    if (fm == null) {
        throw new IllegalStateException("The activity must be a subclass of FragmentActivity");
    }

    MediaRouteDialogFactory factory = new MediaRouteChooserDialogFactory(player, controller,
            activity);

    if (fm.findFragmentByTag(
            "android.support.v7.mediarouter:MediaRouteChooserDialogFragment") != null) {
        Log.w(TAG, "showDialog(): Route chooser dialog already showing!");
        return;
    }
    MediaRouteChooserDialogFragment f = factory.onCreateChooserDialogFragment();

    f.setRouteSelector(controller.buildMediaRouteSelector());
    f.show(fm, "android.support.v7.mediarouter:MediaRouteChooserDialogFragment");
}
 

import android.support.v7.app.MediaRouteChooserDialogFragment; //导入依赖的package包/类
/**
 * called after the user finishes the screen capture permissions activity
 * @param requestCode arbitrary int representing why the activity was started
 * @param resultCode int indicating success or failure
 * @param data an Intent representing screen capture permission
 */
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode != SCREEN_CAPTURE_REQUEST) {
        // this request wasn't meant for us
    } else if (resultCode != AppCompatActivity.RESULT_OK) {
        Toast.makeText(this, "Screen casting won't work without capture permission", Toast.LENGTH_LONG).show();
    } else {
        mPermissionsResultCode = resultCode;
        mPermissionsData = data;

        if (mProvider != null && mProvider.getMediaRouteButton() != null) {
            MediaRouteDialogFactory factory = mProvider.getMediaRouteButton().getDialogFactory();
            MediaRouteChooserDialogFragment chooser = factory.onCreateChooserDialogFragment();
            chooser.setRouteSelector(mSelector);
            FragmentManager fm = getSupportFragmentManager();
            chooser.show(fm, CastScreenMediaRouteButton.CHOOSER_TAG);
        } else {
            Log.e(TAG, "Null action provider or route button - " + PLEASE_REPORT_BUG);
        }
    }
}
 

import android.support.v7.app.MediaRouteChooserDialogFragment; //导入依赖的package包/类
private void showMediaRouteDialog(MediaRouteController controller, Activity activity) {

        FragmentManager fm = ((FragmentActivity) activity).getSupportFragmentManager();
        if (fm == null) {
            throw new IllegalStateException("The activity must be a subclass of FragmentActivity");
        }

        MediaRouteDialogFactory factory = new ChromeMediaRouteDialogFactory();

        if (fm.findFragmentByTag(
                "android.support.v7.mediarouter:MediaRouteChooserDialogFragment") != null) {
            Log.w(TAG, "showDialog(): Route chooser dialog already showing!");
            return;
        }
        MediaRouteChooserDialogFragment f = factory.onCreateChooserDialogFragment();

        f.setRouteSelector(controller.buildMediaRouteSelector());
        f.show(fm, "android.support.v7.mediarouter:MediaRouteChooserDialogFragment");
    }
 

import android.support.v7.app.MediaRouteChooserDialogFragment; //导入依赖的package包/类
@Override
public MediaRouteChooserDialogFragment onCreateChooserDialogFragment() {
    return new MediaRouteChooserDialogFragment() {
        final SystemVisibilitySaver mVisibilitySaver = new SystemVisibilitySaver();

        @Override
        public MediaRouteChooserDialog onCreateChooserDialog(
                Context context, Bundle savedInstanceState) {
            mVisibilitySaver.saveSystemVisibility(getActivity());
            return new MediaRouteChooserDialog(context);
        }

        @Override
        public void onStop() {
            super.onStop();
            mVisibilitySaver.restoreSystemVisibility(getActivity());
        }
    };
}
 

import android.support.v7.app.MediaRouteChooserDialogFragment; //导入依赖的package包/类
private void openCastDialog() {
    final FragmentManager fm = getSupportFragmentManager();
    MediaRouteChooserDialogFragment f = MediaRouteDialogFactory.getDefault().onCreateChooserDialogFragment();
    f.setRouteSelector(CastContext.getSharedInstance(this).getMergedSelector());
    f.show(fm, "android.support.v7.mediarouter:MediaRouteChooserDialogFragment");
}
 

import android.support.v7.app.MediaRouteChooserDialogFragment; //导入依赖的package包/类
@Override
public MediaRouteChooserDialogFragment onCreateChooserDialogFragment() {
    return new Fragment(mController, mPlayer);
}
 

import android.support.v7.app.MediaRouteChooserDialogFragment; //导入依赖的package包/类
@NonNull
@Override
public MediaRouteChooserDialogFragment onCreateChooserDialogFragment() {
	return new CustomMediaRouteChooserDialogFragment();
}
 

import android.support.v7.app.MediaRouteChooserDialogFragment; //导入依赖的package包/类
@Override
public MediaRouteChooserDialogFragment onCreateChooserDialogFragment() {
	return new CustomMediaRouteChooserDialogFragment();
}