/
MainActivity.java
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/
MainActivity.java
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/*
* Copyright (C) 2017 The Android Open Source Project
*
* 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.
*/
package com.google.android.exoplayer2.castdemo;
import android.content.Context;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
import androidx.annotation.Nullable;
import androidx.appcompat.app.AlertDialog;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.graphics.ColorUtils;
import androidx.recyclerview.widget.ItemTouchHelper;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import androidx.recyclerview.widget.RecyclerView.ViewHolder;
import com.google.android.exoplayer2.C;
import com.google.android.exoplayer2.ExoPlayer;
import com.google.android.exoplayer2.MediaItem;
import com.google.android.exoplayer2.ui.StyledPlayerView;
import com.google.android.exoplayer2.util.Assertions;
import com.google.android.exoplayer2.util.Util;
import com.google.android.gms.cast.framework.CastButtonFactory;
import com.google.android.gms.cast.framework.CastContext;
import com.google.android.gms.dynamite.DynamiteModule;
/**
* An activity that plays video using {@link ExoPlayer} and supports casting using ExoPlayer's Cast
* extension.
*/
public class MainActivity extends AppCompatActivity
implements OnClickListener, PlayerManager.Listener {
private StyledPlayerView playerView;
private PlayerManager playerManager;
private RecyclerView mediaQueueList;
private MediaQueueListAdapter mediaQueueListAdapter;
private CastContext castContext;
// Activity lifecycle methods.
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Getting the cast context later than onStart can cause device discovery not to take place.
try {
castContext = CastContext.getSharedInstance(this);
} catch (RuntimeException e) {
Throwable cause = e.getCause();
while (cause != null) {
if (cause instanceof DynamiteModule.LoadingException) {
setContentView(R.layout.cast_context_error);
return;
}
cause = cause.getCause();
}
// Unknown error. We propagate it.
throw e;
}
setContentView(R.layout.main_activity);
playerView = findViewById(R.id.player_view);
playerView.requestFocus();
mediaQueueList = findViewById(R.id.sample_list);
ItemTouchHelper helper = new ItemTouchHelper(new RecyclerViewCallback());
helper.attachToRecyclerView(mediaQueueList);
mediaQueueList.setLayoutManager(new LinearLayoutManager(this));
mediaQueueList.setHasFixedSize(true);
mediaQueueListAdapter = new MediaQueueListAdapter();
findViewById(R.id.add_sample_button).setOnClickListener(this);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
super.onCreateOptionsMenu(menu);
getMenuInflater().inflate(R.menu.menu, menu);
CastButtonFactory.setUpMediaRouteButton(this, menu, R.id.media_route_menu_item);
return true;
}
@Override
public void onResume() {
super.onResume();
if (castContext == null) {
// There is no Cast context to work with. Do nothing.
return;
}
playerManager =
new PlayerManager(/* listener= */ this, this, playerView, /* context= */ castContext);
mediaQueueList.setAdapter(mediaQueueListAdapter);
}
@Override
public void onPause() {
super.onPause();
if (castContext == null) {
// Nothing to release.
return;
}
mediaQueueListAdapter.notifyItemRangeRemoved(0, mediaQueueListAdapter.getItemCount());
mediaQueueList.setAdapter(null);
playerManager.release();
playerManager = null;
}
// Activity input.
@Override
public boolean dispatchKeyEvent(KeyEvent event) {
// If the event was not handled then see if the player view can handle it.
return super.dispatchKeyEvent(event) || playerManager.dispatchKeyEvent(event);
}
@Override
public void onClick(View view) {
new AlertDialog.Builder(this)
.setTitle(R.string.add_samples)
.setView(buildSampleListView())
.setPositiveButton(android.R.string.ok, null)
.create()
.show();
}
// PlayerManager.Listener implementation.
@Override
public void onQueuePositionChanged(int previousIndex, int newIndex) {
if (previousIndex != C.INDEX_UNSET) {
mediaQueueListAdapter.notifyItemChanged(previousIndex);
}
if (newIndex != C.INDEX_UNSET) {
mediaQueueListAdapter.notifyItemChanged(newIndex);
}
}
@Override
public void onUnsupportedTrack(int trackType) {
if (trackType == C.TRACK_TYPE_AUDIO) {
showToast(R.string.error_unsupported_audio);
} else if (trackType == C.TRACK_TYPE_VIDEO) {
showToast(R.string.error_unsupported_video);
}
}
// Internal methods.
private void showToast(int messageId) {
Toast.makeText(getApplicationContext(), messageId, Toast.LENGTH_LONG).show();
}
private View buildSampleListView() {
View dialogList = getLayoutInflater().inflate(R.layout.sample_list, null);
ListView sampleList = dialogList.findViewById(R.id.sample_list);
sampleList.setAdapter(new SampleListAdapter(this));
sampleList.setOnItemClickListener(
(parent, view, position, id) -> {
playerManager.addItem(DemoUtil.SAMPLES.get(position));
mediaQueueListAdapter.notifyItemInserted(playerManager.getMediaQueueSize() - 1);
});
return dialogList;
}
// Internal classes.
private class MediaQueueListAdapter extends RecyclerView.Adapter<QueueItemViewHolder> {
@Override
public QueueItemViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
TextView v =
(TextView)
LayoutInflater.from(parent.getContext())
.inflate(android.R.layout.simple_list_item_1, parent, false);
return new QueueItemViewHolder(v);
}
@Override
public void onBindViewHolder(QueueItemViewHolder holder, int position) {
holder.item = Assertions.checkNotNull(playerManager.getItem(position));
TextView view = holder.textView;
view.setText(holder.item.mediaMetadata.title);
// TODO: Solve coloring using the theme's ColorStateList.
view.setTextColor(
ColorUtils.setAlphaComponent(
view.getCurrentTextColor(),
position == playerManager.getCurrentItemIndex() ? 255 : 100));
}
@Override
public int getItemCount() {
return playerManager.getMediaQueueSize();
}
}
private class RecyclerViewCallback extends ItemTouchHelper.SimpleCallback {
private int draggingFromPosition;
private int draggingToPosition;
public RecyclerViewCallback() {
super(ItemTouchHelper.UP | ItemTouchHelper.DOWN, ItemTouchHelper.START | ItemTouchHelper.END);
draggingFromPosition = C.INDEX_UNSET;
draggingToPosition = C.INDEX_UNSET;
}
@Override
public boolean onMove(
RecyclerView list, RecyclerView.ViewHolder origin, RecyclerView.ViewHolder target) {
int fromPosition = origin.getBindingAdapterPosition();
int toPosition = target.getBindingAdapterPosition();
if (draggingFromPosition == C.INDEX_UNSET) {
// A drag has started, but changes to the media queue will be reflected in clearView().
draggingFromPosition = fromPosition;
}
draggingToPosition = toPosition;
mediaQueueListAdapter.notifyItemMoved(fromPosition, toPosition);
return true;
}
@Override
public void onSwiped(RecyclerView.ViewHolder viewHolder, int direction) {
int position = viewHolder.getBindingAdapterPosition();
QueueItemViewHolder queueItemHolder = (QueueItemViewHolder) viewHolder;
if (playerManager.removeItem(queueItemHolder.item)) {
mediaQueueListAdapter.notifyItemRemoved(position);
// Update whichever item took its place, in case it became the new selected item.
mediaQueueListAdapter.notifyItemChanged(position);
}
}
@Override
public void clearView(RecyclerView recyclerView, ViewHolder viewHolder) {
super.clearView(recyclerView, viewHolder);
if (draggingFromPosition != C.INDEX_UNSET) {
QueueItemViewHolder queueItemHolder = (QueueItemViewHolder) viewHolder;
// A drag has ended. We reflect the media queue change in the player.
if (!playerManager.moveItem(queueItemHolder.item, draggingToPosition)) {
// The move failed. The entire sequence of onMove calls since the drag started needs to be
// invalidated.
mediaQueueListAdapter.notifyDataSetChanged();
}
}
draggingFromPosition = C.INDEX_UNSET;
draggingToPosition = C.INDEX_UNSET;
}
}
private class QueueItemViewHolder extends RecyclerView.ViewHolder implements OnClickListener {
public final TextView textView;
public MediaItem item;
public QueueItemViewHolder(TextView textView) {
super(textView);
this.textView = textView;
textView.setOnClickListener(this);
}
@Override
public void onClick(View v) {
playerManager.selectQueueItem(getBindingAdapterPosition());
}
}
private static final class SampleListAdapter extends ArrayAdapter<MediaItem> {
public SampleListAdapter(Context context) {
super(context, android.R.layout.simple_list_item_1, DemoUtil.SAMPLES);
}
@Override
public View getView(int position, @Nullable View convertView, ViewGroup parent) {
View view = super.getView(position, convertView, parent);
((TextView) view).setText(Util.castNonNull(getItem(position)).mediaMetadata.title);
return view;
}
}
}