Java 如果我使用android服务,为什么我的应用程序会关闭?
我想做一个简单的音频播放器。当我在没有服务的主活动中创建它时,它工作正常,正在播放音乐(如果我按下电源按钮关闭屏幕,它工作正常),并且在打开屏幕后仍然工作正常。但如果我使用这项服务在后台播放音乐,当我按下电源按钮打开屏幕时,我的应用程序就会关闭Java 如果我使用android服务,为什么我的应用程序会关闭?,java,android,shutdown,Java,Android,Shutdown,我想做一个简单的音频播放器。当我在没有服务的主活动中创建它时,它工作正常,正在播放音乐(如果我按下电源按钮关闭屏幕,它工作正常),并且在打开屏幕后仍然工作正常。但如果我使用这项服务在后台播放音乐,当我按下电源按钮打开屏幕时,我的应用程序就会关闭 public class MainActivity extends AppCompatActivity { static ArrayList<HashMap<String, Object>> listSongs = ne
public class MainActivity extends AppCompatActivity {
static ArrayList<HashMap<String, Object>> listSongs = new ArrayList<>();
Intent intent;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
listSongs = getAllMusicInfo();
intent = new Intent(this, BackgroundPlayer.class);
Button buttonStart = (Button) findViewById(R.id.startService);
buttonStart.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
startService(intent);
Toast.makeText(MainActivity.this, "It's started", Toast.LENGTH_SHORT).show();
}
});
Button buttonStop = (Button) findViewById(R.id.StopService);
buttonStop.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
stopService(intent);
Toast.makeText(MainActivity.this, "It's stopped", Toast.LENGTH_SHORT).show();
}
});
}
public class BackgroundPlayer extends Service implements MediaPlayer.OnCompletionListener {
MediaPlayer player;
@Override
public void onCreate() {
super.onCreate();
player = new MediaPlayer();
try {
player.setDataSource((String) MainActivity.listSongs.get(0).get("path"));
player.prepare();
} catch (IOException e) {
e.printStackTrace();
}
}
@Nullable
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
player.start();
return START_STICKY;
}
@Override
public void onCompletion(MediaPlayer mp) {}
}
06-05 09:58:54.206 31873-31873/com.vitaliylevashov.serviceplayer V/MediaPlayer: start
public类MainActivity扩展了AppCompatActivity{
静态ArrayList listSongs=新ArrayList();
意图;
@凌驾
创建时受保护的void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
listSongs=getAllMusicInfo();
意图=新意图(这个,BackgroundPlayer.class);
Button buttonStart=(按钮)findViewById(R.id.startService);
buttonStart.setOnClickListener(新视图.OnClickListener(){
@凌驾
公共void onClick(视图v){
startService(意向);
Toast.makeText(MainActivity.this,“它已开始”,Toast.LENGTH_SHORT.show();
}
});
Button buttonStop=(Button)findViewById(R.id.StopService);
buttonStop.setOnClickListener(新视图.OnClickListener(){
@凌驾
公共void onClick(视图v){
停止服务(意向);
Toast.makeText(MainActivity.this,“它已停止”,Toast.LENGTH_SHORT.show();
}
});
}
公共类BackgroundPlayer扩展服务实现MediaPlayer.OnCompletionListener{
媒体播放器;
@凌驾
public void onCreate(){
super.onCreate();
player=新媒体播放器();
试一试{
player.setDataSource((String)MainActivity.listSongs.get(0.get(“路径”));
player.prepare();
}捕获(IOE异常){
e、 printStackTrace();
}
}
@可空
@凌驾
公共IBinder onBind(意向){
返回null;
}
@凌驾
公共int onStartCommand(Intent Intent、int标志、int startId){
player.start();
返回开始时间;
}
@凌驾
完成时的公共无效(MediaPlayer mp){}
}
06-05 09:58:54.206 31873-31873/com.vitaliylevashov.serviceplayer V/MediaPlayer:start
06-05 09:58:54.206 31873-31885/com.vitaliylevashov.serviceplayer V/MediaPlayer:message received msg=6,ext1=0,ext2=0
06-05 09:58:54.206 31873-31885/com.vitaliylevashov.serviceplayer V/MediaPlayer:Received MEDIA_启动
06-05 09:58:54.206 31873-31885/com.vitaliylevashov.serviceplayer V/MediaPlayer:回调应用程序
06-05 09:58:54.206 31873-31885/com.vitaliylevashhov.serviceplayer V/MediaPlayer:back from callback
06-05 09:58:54.236 31873-31873/com.vitaliylevashov.serviceplayer I/MediaPlayer:不发送意图。msg.arg1=0,msg.arg2=0
06-05 09:58:54.236 31873-31873/com.vitaliylevashov.serviceplayer E/MediaPlayer:应该已经设置了字幕控制器
06-05 09:58:54.256 31873-31873/com.vitaliylevashov.serviceplayer V/MediaPlayer JNI:getCurrentPosition:192(毫秒)
06-05 09:58:54.256 31873-31873/com.vitaliylevashov.serviceplayer V/MediaPlayer JNI:isplay:1
在清单中添加服务标记,可能您还没有在清单中添加该标记
请求发布错误日志/logcat在清单中添加服务标记,可能是您尚未在清单中添加服务标记
请求发布错误日志/logcat你能发布logcat吗?你能发布logcat吗?嗨,我正在清单中添加服务标记,但它仍然不工作嗨,我正在清单中添加服务标记,但它仍然不工作