/***
Copyright (c) 2014 CommonsWare, LLC
Licensed under the Apache License, Version 2.0 (the "License"); you may not
use this file except in compliance with the License. You may obtain a copy
of the License at http://www.apache.org/licenses/LICENSE-2.0. Unless required
by applicable law or agreed to in writing, software distributed under the
License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS
OF ANY KIND, either express or implied. See the License for the specific
language governing permissions and limitations under the License.
Covered in detail in the book _The Busy Coder's Guide to Android Development_
https://commonsware.com/Android
*/
package com.commonsware.android.remoteplayback;
import android.app.Activity;
import android.net.Uri;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.view.MenuItemCompat;
import android.support.v7.app.MediaRouteActionProvider;
import android.support.v7.media.MediaControlIntent;
import android.support.v7.media.MediaItemStatus;
import android.support.v7.media.MediaRouteSelector;
import android.support.v7.media.MediaRouter;
import android.support.v7.media.MediaSessionStatus;
import android.support.v7.media.RemotePlaybackClient;
import android.support.v7.media.RemotePlaybackClient.ItemActionCallback;
import android.support.v7.media.RemotePlaybackClient.SessionActionCallback;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ScrollView;
import android.widget.TextView;
public class PlaybackFragment extends Fragment {
private MediaRouteSelector selector=null;
private MediaRouter router=null;
private TextView transcript=null;
private ScrollView scroll=null;
private RemotePlaybackClient client=null;
private boolean isPlaying=false;
private boolean isPaused=false;
private Menu menu=null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setRetainInstance(true);
setHasOptionsMenu(true);
selector=
new MediaRouteSelector.Builder()
.addControlCategory(MediaControlIntent.CATEGORY_REMOTE_PLAYBACK).build();
}
@Override
public void onAttach(Activity host) {
super.onAttach(host);
router=MediaRouter.getInstance(host);
}
@Override
public View onCreateView(LayoutInflater inflater,
ViewGroup container,
Bundle savedInstanceState) {
scroll=
(ScrollView)inflater.inflate(R.layout.activity_main, container,
false);
transcript=(TextView)scroll.findViewById(R.id.transcript);
logToTranscript("Started");
return(scroll);
}
@Override
public void onStart() {
super.onStart();
router.addCallback(selector, cb,
MediaRouter.CALLBACK_FLAG_REQUEST_DISCOVERY);
}
@Override
public void onStop() {
router.removeCallback(cb);
super.onStop();
}
@Override
public void onDestroy() {
disconnect();
super.onDestroy();
}
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
this.menu=menu;
inflater.inflate(R.menu.main, menu);
updateMenu();
MenuItem item=menu.findItem(R.id.route_provider);
MediaRouteActionProvider provider=
(MediaRouteActionProvider)MenuItemCompat.getActionProvider(item);
provider.setRouteSelector(selector);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.play:
if (isPlaying && isPaused) {
resume();
}
else {
play();
}
return(true);
case R.id.stop:
stop();
return(true);
case R.id.pause:
pause();
return(true);
}
return(super.onOptionsItemSelected(item));
}
private void updateMenu() {
if (menu != null) {
menu.findItem(R.id.stop).setVisible(client != null && isPlaying);
menu.findItem(R.id.pause).setVisible(client != null && isPlaying
&& !isPaused);
menu.findItem(R.id.play)
.setVisible(client != null && (!isPlaying || isPaused));
}
}
private void play() {
logToTranscript(getActivity().getString(R.string.play_requested));
ItemActionCallback playCB=new ItemActionCallback() {
@Override
public void onResult(Bundle data, String sessionId,
MediaSessionStatus sessionStatus,
String itemId, MediaItemStatus itemStatus) {
logToTranscript(getActivity().getString(R.string.playing));
isPlaying=true;
updateMenu();
}
@Override
public void onError(String error, int code, Bundle data) {
logToTranscript(getActivity().getString(R.string.play_error)
+ error);
}
};
client.play(Uri.parse("http://misc.commonsware.com/ed_hd_512kb.mp4"),
"video/mp4", null, 0, null, playCB);
}
private void pause() {
logToTranscript(getActivity().getString(R.string.pause_requested));
PauseCallback pauseCB=new PauseCallback();
client.pause(null, pauseCB);
transcript.postDelayed(pauseCB, 1000);
}
private void resume() {
logToTranscript(getActivity().getString(R.string.resume_requested));
ResumeCallback resumeCB=new ResumeCallback();
client.resume(null, resumeCB);
transcript.postDelayed(resumeCB, 1000);
}
private void stop() {
logToTranscript(getActivity().getString(R.string.stop_requested));
StopCallback stopCB=new StopCallback();
client.stop(null, stopCB);
transcript.postDelayed(stopCB, 1000);
}
private void logToTranscript(String msg) {
if (client != null) {
String sessionId=client.getSessionId();
if (sessionId != null) {
msg="(" + sessionId + ") " + msg;
}
}
transcript.setText(transcript.getText().toString() + msg + "\n");
scroll.fullScroll(View.FOCUS_DOWN);
}
private void connect(MediaRouter.RouteInfo route) {
client=
new RemotePlaybackClient(getActivity().getApplication(), route);
if (client.isRemotePlaybackSupported()) {
logToTranscript(getActivity().getString(R.string.connected));
if (client.isSessionManagementSupported()) {
client.startSession(null, new SessionActionCallback() {
@Override
public void onResult(Bundle data, String sessionId,
MediaSessionStatus sessionStatus) {
logToTranscript(getActivity().getString(R.string.session_started));
updateMenu();
}
@Override
public void onError(String error, int code, Bundle data) {
logToTranscript(getActivity().getString(R.string.session_failed));
}
});
}
else {
getActivity().supportInvalidateOptionsMenu();
}
}
else {
logToTranscript(getActivity().getString(R.string.remote_playback_not_supported));
client=null;
}
}
private void disconnect() {
isPlaying=false;
isPaused=false;
if (client != null) {
logToTranscript(getActivity().getString(R.string.session_ending));
EndSessionCallback endCB=new EndSessionCallback();
if (client.isSessionManagementSupported()) {
client.endSession(null, endCB);
}
transcript.postDelayed(endCB, 1000);
}
}
private MediaRouter.Callback cb=new MediaRouter.Callback() {
@Override
public void onRouteSelected(MediaRouter router,
MediaRouter.RouteInfo route) {
logToTranscript(getActivity().getString(R.string.route_selected));
connect(route);
}
@Override
public void onRouteUnselected(MediaRouter router,
MediaRouter.RouteInfo route) {
logToTranscript(getActivity().getString(R.string.route_unselected));
disconnect();
}
};
abstract class RunnableSessionActionCallback extends
SessionActionCallback implements Runnable {
abstract protected void doWork();
private boolean hasRun=false;
@Override
public void onResult(Bundle data, String sessionId,
MediaSessionStatus sessionStatus) {
transcript.removeCallbacks(this);
run();
}
@Override
public void run() {
if (!hasRun) {
hasRun=true;
doWork();
}
}
}
private class PauseCallback extends RunnableSessionActionCallback {
@Override
protected void doWork() {
isPaused=true;
updateMenu();
logToTranscript(getActivity().getString(R.string.paused));
}
}
private class ResumeCallback extends RunnableSessionActionCallback {
@Override
protected void doWork() {
isPaused=false;
updateMenu();
logToTranscript(getActivity().getString(R.string.resumed));
}
}
private class StopCallback extends RunnableSessionActionCallback {
@Override
protected void doWork() {
isPlaying=false;
isPaused=false;
updateMenu();
logToTranscript(getActivity().getString(R.string.stopped));
}
}
private class EndSessionCallback extends
RunnableSessionActionCallback {
@Override
protected void doWork() {
client.release();
client=null;
if (getActivity() != null) {
updateMenu();
logToTranscript(getActivity().getString(R.string.session_ended));
}
}
}
}