我的 AlarmService 只关闭了 3 秒
my AlarmService go off for only 3 sec
我正在使用闹钟管理器来设置和闹钟,它会在一天中使用服务的确切时间响起
但它只 运行 媒体播放器 3 秒并终止服务,
如果我在闹钟播放 运行 时滑动应用程序,服务将终止
// 当我使用 TimePicker 而不是自己设置时间时,闹钟会立即响起 3 秒然后停止,并且在我使用 TimePicker 选择的确切时间闹钟完美运行
<manifest
<uses-permission android:name="android.permission.WAKE_LOCK" />
<service
android:name=".Service"
android:exported="false" />
服务
public class Service extends android.app.Service {
@Override
public IBinder onBind(Intent arg0) {
return null;
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
MediaPlayer mediaPlayer = MediaPlayer.create(this, R.raw.rev);
mediaPlayer.start();
return START_STICKY;
}
}
主要活动
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.YEAR, 2018);
calendar.set(Calendar.MONTH, 2);
calendar.set(Calendar.DAY_OF_MONTH, 24);
calendar.set(Calendar.HOUR_OF_DAY, 1);
calendar.set(Calendar.MINUTE, 4);
calendar.set(Calendar.SECOND, 0);
setAlarm(calendar.getTimeInMillis());
}
private void setAlarm(long time) {
Intent i = new Intent(this, Service.class);
PendingIntent pendingIntent = PendingIntent.getService(this, 0, i, 0);
AlarmManager am = (AlarmManager)getSystemService(Context.ALARM_SERVICE);
int ALARM_TYPE = AlarmManager.RTC_WAKEUP;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M)
am.setExactAndAllowWhileIdle(ALARM_TYPE, time, pendingIntent);
else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT)
am.setExact(ALARM_TYPE, time, pendingIntent);
else
am.set(ALARM_TYPE, time, pendingIntent);
Toast.makeText(this, "Alarm is set", Toast.LENGTH_SHORT).show();
}
}
您应该在 onStart()
方法中使用 startForeground(<notification id>, <notification>)
作为前台服务启动该服务。那么它的优先级会更高,被杀死的可能性也更小。参见 startForeground。
我正在使用闹钟管理器来设置和闹钟,它会在一天中使用服务的确切时间响起 但它只 运行 媒体播放器 3 秒并终止服务, 如果我在闹钟播放 运行 时滑动应用程序,服务将终止
// 当我使用 TimePicker 而不是自己设置时间时,闹钟会立即响起 3 秒然后停止,并且在我使用 TimePicker 选择的确切时间闹钟完美运行
<manifest
<uses-permission android:name="android.permission.WAKE_LOCK" />
<service
android:name=".Service"
android:exported="false" />
服务
public class Service extends android.app.Service {
@Override
public IBinder onBind(Intent arg0) {
return null;
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
MediaPlayer mediaPlayer = MediaPlayer.create(this, R.raw.rev);
mediaPlayer.start();
return START_STICKY;
}
}
主要活动
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.YEAR, 2018);
calendar.set(Calendar.MONTH, 2);
calendar.set(Calendar.DAY_OF_MONTH, 24);
calendar.set(Calendar.HOUR_OF_DAY, 1);
calendar.set(Calendar.MINUTE, 4);
calendar.set(Calendar.SECOND, 0);
setAlarm(calendar.getTimeInMillis());
}
private void setAlarm(long time) {
Intent i = new Intent(this, Service.class);
PendingIntent pendingIntent = PendingIntent.getService(this, 0, i, 0);
AlarmManager am = (AlarmManager)getSystemService(Context.ALARM_SERVICE);
int ALARM_TYPE = AlarmManager.RTC_WAKEUP;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M)
am.setExactAndAllowWhileIdle(ALARM_TYPE, time, pendingIntent);
else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT)
am.setExact(ALARM_TYPE, time, pendingIntent);
else
am.set(ALARM_TYPE, time, pendingIntent);
Toast.makeText(this, "Alarm is set", Toast.LENGTH_SHORT).show();
}
}
您应该在 onStart()
方法中使用 startForeground(<notification id>, <notification>)
作为前台服务启动该服务。那么它的优先级会更高,被杀死的可能性也更小。参见 startForeground。