E/WindowManager:android.view.WindowManager错误
我正在尝试构建一个android音乐播放器应用程序,如中所述 当我能够播放音乐时,在通知托盘中单击播放器图标时,我收到错误消息E/WindowManager:android.view.WindowManager错误,android,android-intent,android-notifications,android-music-player,Android,Android Intent,Android Notifications,Android Music Player,我正在尝试构建一个android音乐播放器应用程序,如中所述 当我能够播放音乐时,在通知托盘中单击播放器图标时,我收到错误消息 E/WindowManager: android.view.WindowLeaked: .MainActivity has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView. 从通知栏调用播放机后,调用MediaController.show()时引发错误 花了很多时间浏览各种类似
E/WindowManager: android.view.WindowLeaked: .MainActivity has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView.
从通知栏调用播放机后,调用MediaController.show()时引发错误
花了很多时间浏览各种类似的问题,但没有一个适合我的情况。非常感谢您的帮助。多谢各位
主要活动:
public class MainActivity extends Activity implements MediaPlayerControl {
//song list variables
private ArrayList<Song> songList;
private ListView songView;
//service
private MusicService musicSrv;
private Intent playIntent;
//binding
private boolean musicBound=false;
//controller
private MusicController controller;
//activity and playback pause flags
private boolean paused=false, playbackPaused=false;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//retrieve list view
songView = (ListView)findViewById(R.id.song_list);
//instantiate list
songList = new ArrayList<Song>();
//get songs from device
getSongList();
//sort alphabetically by title
Collections.sort(songList, new Comparator<Song>(){
public int compare(Song a, Song b){
return a.getTitle().compareTo(b.getTitle());
}
});
//create and set adapter
SongAdapter songAdt = new SongAdapter(this, songList);
songView.setAdapter(songAdt);
//setup controller
setController();
}
//connect to the service
private ServiceConnection musicConnection = new ServiceConnection(){
@Override
public void onServiceConnected(ComponentName name, IBinder service) {
MusicBinder binder = (MusicBinder)service;
//get service
musicSrv = binder.getService();
//pass list
musicSrv.setList(songList);
musicBound = true;
}
@Override
public void onServiceDisconnected(ComponentName name) {
musicBound = false;
}
};
//start and bind the service when the activity starts
@Override
protected void onStart() {
super.onStart();
if(playIntent==null){
playIntent = new Intent(this, MusicService.class);
bindService(playIntent, musicConnection, Context.BIND_AUTO_CREATE);
startService(playIntent);
}
}
//user song select
public void songPicked(View view){
musicSrv.setSong(Integer.parseInt(view.getTag().toString()));
musicSrv.playSong();
if(playbackPaused){
setController();
playbackPaused=false;
}
controller.show(0);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
//menu item selected
switch (item.getItemId()) {
case R.id.action_shuffle:
musicSrv.setShuffle();
break;
case R.id.action_end:
stopService(playIntent);
musicSrv=null;
System.exit(0);
break;
}
return super.onOptionsItemSelected(item);
}
//method to retrieve song info from device
public void getSongList(){
//query external audio
ContentResolver musicResolver = getContentResolver();
Uri musicUri = android.provider.MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
Cursor musicCursor = musicResolver.query(musicUri, null, null, null, null);
//iterate over results if valid
if(musicCursor!=null && musicCursor.moveToFirst()){
//get columns
int titleColumn = musicCursor.getColumnIndex
(android.provider.MediaStore.Audio.Media.TITLE);
int idColumn = musicCursor.getColumnIndex
(android.provider.MediaStore.Audio.Media._ID);
int artistColumn = musicCursor.getColumnIndex
(android.provider.MediaStore.Audio.Media.ARTIST);
//add songs to list
do {
long thisId = musicCursor.getLong(idColumn);
String thisTitle = musicCursor.getString(titleColumn);
String thisArtist = musicCursor.getString(artistColumn);
songList.add(new Song(thisId, thisTitle, thisArtist));
}
while (musicCursor.moveToNext());
}
}
//set the controller up
private void setController(){
controller = new MusicController(this);
//set previous and next button listeners
controller.setPrevNextListeners(new View.OnClickListener() {
@Override
public void onClick(View v) {
playNext();
}
}, new View.OnClickListener() {
@Override
public void onClick(View v) {
playPrev();
}
});
//set and show
controller.setMediaPlayer(this);
controller.setAnchorView(findViewById(R.id.song_list));
controller.setEnabled(true);
}
private void playNext(){
musicSrv.playNext();
if(playbackPaused){
setController();
playbackPaused=false;
}
controller.show(0);
}
private void playPrev(){
musicSrv.playPrev();
if(playbackPaused){
setController();
playbackPaused=false;
}
controller.show(0);
}
@Override
protected void onResume(){
super.onResume();
if(paused){
setController();
paused=false;
}
}
@Override
protected void onDestroy() {
stopService(playIntent);
musicSrv=null;
super.onDestroy();
}
}
音乐服务:
public class MusicService extends Service implements
MediaPlayer.OnPreparedListener, MediaPlayer.OnErrorListener,
MediaPlayer.OnCompletionListener {
//media player
private MediaPlayer player;
//song list
private ArrayList<Song> songs;
//current position
private int songPosn;
//binder
private final IBinder musicBind = new MusicBinder();
//title of current song
private String songTitle="";
//notification id
private static final int NOTIFY_ID=1;
//shuffle flag and random
private boolean shuffle=false;
private Random rand;
public void onCreate(){
//create the service
super.onCreate();
//initialize position
songPosn=0;
//random
rand=new Random();
//create player
player = new MediaPlayer();
//initialize
initMusicPlayer();
}
public void initMusicPlayer(){
//set player properties
player.setWakeMode(getApplicationContext(),
PowerManager.PARTIAL_WAKE_LOCK);
player.setAudioStreamType(AudioManager.STREAM_MUSIC);
//set listeners
player.setOnPreparedListener(this);
player.setOnCompletionListener(this);
player.setOnErrorListener(this);
}
//pass song list
public void setList(ArrayList<Song> theSongs){
songs=theSongs;
}
//binder
public class MusicBinder extends Binder {
MusicService getService() {
return MusicService.this;
}
}
//activity will bind to service
@Override
public IBinder onBind(Intent intent) {
return musicBind;
}
//release resources when unbind
@Override
public boolean onUnbind(Intent intent){
player.stop();
player.release();
return false;
}
//play a song
public void playSong(){
//play
player.reset();
//get song
Song playSong = songs.get(songPosn);
//get title
songTitle=playSong.getTitle();
//get id
long currSong = playSong.getID();
//set uri
Uri trackUri = ContentUris.withAppendedId(
android.provider.MediaStore.Audio.Media.EXTERNAL_CONTENT_URI,
currSong);
//set the data source
try{
player.setDataSource(getApplicationContext(), trackUri);
}
catch(Exception e){
Log.e("MUSIC SERVICE", "Error setting data source", e);
}
player.prepareAsync();
}
//set the song
public void setSong(int songIndex){
songPosn=songIndex;
}
@Override
public void onCompletion(MediaPlayer mp) {
//check if playback has reached the end of a track
if(player.getCurrentPosition()>0){
mp.reset();
playNext();
}
}
@Override
public boolean onError(MediaPlayer mp, int what, int extra) {
Log.v("MUSIC PLAYER", "Playback Error");
mp.reset();
return false;
}
@Override
public void onPrepared(MediaPlayer mp) {
//start playback
mp.start();
//notification
Intent notIntent = new Intent(this, MainActivity.class);
notIntent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
PendingIntent pendInt = PendingIntent.getActivity(this, 0,
notIntent, PendingIntent.FLAG_UPDATE_CURRENT);
NotificationCompat.Builder builder = new NotificationCompat.Builder(this);
builder.setContentIntent(pendInt)
.setSmallIcon(R.drawable.play)
.setTicker(songTitle)
.setOngoing(true)
.setContentTitle("Playing")
.setContentText(songTitle);
Notification not = builder.build();
startForeground(NOTIFY_ID, not);
}
//playback methods
public int getPosn(){
return player.getCurrentPosition();
}
public int getDur(){
return player.getDuration();
}
public boolean isPng(){
return player.isPlaying();
}
public void pausePlayer(){
player.pause();
}
public void seek(int posn){
player.seekTo(posn);
}
public void go(){
player.start();
}
//skip to previous track
public void playPrev(){
songPosn--;
if(songPosn<0) songPosn=songs.size()-1;
playSong();
}
//skip to next
public void playNext(){
if(shuffle){
int newSong = songPosn;
while(newSong==songPosn){
newSong=rand.nextInt(songs.size());
}
songPosn=newSong;
}
else{
songPosn++;
if(songPosn>=songs.size()) songPosn=0;
}
playSong();
}
@Override
public void onDestroy() {
stopForeground(true);
}
//toggle shuffle
public void setShuffle(){
if(shuffle) shuffle=false;
else shuffle=true;
}
}
公共类MusicService扩展服务实现
MediaPlayer.OnPreparedListener,MediaPlayer.OnErrorListener,
MediaPlayer.OnCompletionListener{
//媒体播放器
私人媒体播放器;
//歌曲列表
私人雅乐歌曲;
//当前位置
私家车;
//活页夹
私有最终IBinder musicBind=新的MusicBinder();
//当前歌曲的标题
私有字符串songTitle=“”;
//通知id
私有静态final int NOTIFY_ID=1;
//随机旗和随机旗
私有布尔洗牌=false;
私有随机兰德;
public void onCreate(){
//创建服务
super.onCreate();
//初始化位置
songPosn=0;
//随机的
rand=新随机数();
//创建玩家
player=新媒体播放器();
//初始化
initMusicLayer();
}
public void initMusicPlayer(){
//设置玩家属性
player.setWakeMode(getApplicationContext(),
PowerManager.PARTIAL_WAKE_LOCK);
player.setAudioStreamType(AudioManager.STREAM_MUSIC);
//设置侦听器
player.setOnPreparedListener(此);
player.setOnCompletionListener(此);
player.setOneErrorListener(此);
}
//通过歌曲列表
公共无效集合列表(数组列表歌曲){
歌曲=歌曲;
}
//活页夹
公共类MusicBinder扩展活页夹{
MusicService getService(){
返回MusicService.this;
}
}
//活动将绑定到服务
@凌驾
公共IBinder onBind(意向){
返回音乐绑定;
}
//解除绑定时释放资源
@凌驾
公共布尔onUnbind(意图){
player.stop();
player.release();
返回false;
}
//放首歌
公开播放歌曲(){
//玩
player.reset();
//获得歌曲
Song playSong=songs.get(songPosn);
//获得头衔
songTitle=playSong.getTitle();
//取得身份证
long currSong=playSong.getID();
//设置uri
Uri trackUri=ContentUris.withAppendedId(
android.provider.MediaStore.Audio.Media.EXTERNAL\u CONTENT\u URI,
柯尔松);
//设置数据源
试试{
setDataSource(getApplicationContext(),trackUri);
}
捕获(例外e){
Log.e(“音乐服务”,“错误设置数据源”,e);
}
player.prepareAsync();
}
//设定歌曲
公共空间集松(国际歌曲索引){
songPosn=songIndex;
}
@凌驾
完成时的公共作废(MediaPlayer mp){
//检查播放是否已到达曲目的结尾
如果(player.getCurrentPosition()>0){
mp.reset();
playNext();
}
}
@凌驾
公共布尔onError(MediaPlayer mp,int what,int extra){
Log.v(“音乐播放器”,“播放错误”);
mp.reset();
返回false;
}
@凌驾
已准备好公开作废(MediaPlayer mp){
//开始播放
mp.start();
//通知
Intent notIntent=新的Intent(this,MainActivity.class);
notIntent.addFlags(Intent.FLAG\u ACTIVITY\u CLEAR\u TOP);
PendingEvent pendInt=PendingEvent.getActivity(此,0,
notIntent、PendingEvent.FLAG_UPDATE_CURRENT);
NotificationCompat.Builder=新建NotificationCompat.Builder(此);
builder.setContentIntent(pendInt)
.setSmallIcon(右可拖动播放)
.setTicker(歌曲标题)
.正在进行(正确)
.setContentTitle(“播放”)
.setContentText(歌曲标题);
Notification not=builder.build();
startForeground(通知您的ID,而不是);
}
//回放方法
public int getPosn(){
返回player.getCurrentPosition();
}
公共int getDur(){
返回player.getDuration();
}
公共布尔值isPng(){
返回player.isPlaying();
}
public void pausePlayer(){
player.pause();
}
公共无效搜索(int posn){
player.seekTo(posn);
}
公开作废go(){
player.start();
}
//跳到上一曲目
公共空间playPrev(){
松波森;
如果(songPosn=songs.size())songPosn=0;
}
播放歌曲();
}
@凌驾
公共空间{
停止前景(真);
}
//切换洗牌
公营部门{
如果(shuffle)shuffle=false;
else shuffle=true;
}
}
您的MusicController
类很可能泄漏您的主活动。请看这一行:
controller.setMediaPlayer(this);
方向改变后会发生什么?创建了一个新的活动,但是您的控制器可能仍然引用以前的活动,并且不会让垃圾收集器从堆中删除以前的活动,因此可能会导致内存泄漏
为了确保我的假设,您可以安装,这将指出泄漏的根本原因
另请参阅Android中其他类型的内存泄漏以及如何克服它们。发布相关代码。跟踪泄漏的位置MainActivity
class.@azizbekian您为什么建议这样做?日志显示,您正在引用来自MainActivity
的窗口:MainActivity已泄漏窗口
@azizbekian很抱歉响应延迟。代码张贴。请拿
controller.setMediaPlayer(this);