Android Oreo+中的AlarmManager和BroadcastReceiver
创始人
2024-08-14 22:00:50
0

在Android Oreo及以上版本中,由于后台限制的加强,使用AlarmManager和BroadcastReceiver需要进行一些特殊处理。以下是解决方法的示例代码:

  1. 首先,在AndroidManifest.xml文件中添加以下权限和声明:



    ...
    
        
            
        
    
    ...

  1. 创建BroadcastReceiver类,用于接收AlarmManager触发的广播:
public class YourBroadcastReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        // 在此处处理AlarmManager触发的操作
    }
}
  1. 在你的Activity或Service中设置AlarmManager,并确保在Android Oreo及以上版本中使用setExactAndAllowWhileIdle或setAndAllowWhileIdle方法:
AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
Intent intent = new Intent(this, YourBroadcastReceiver.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, intent, 0);

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
    alarmManager.setExactAndAllowWhileIdle(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + 10000, pendingIntent);
} else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
    alarmManager.setExact(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + 10000, pendingIntent);
} else {
    alarmManager.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + 10000, pendingIntent);
}
  1. 在你的Activity或Service中注册和取消注册BroadcastReceiver:
public class YourActivity extends AppCompatActivity {
    private YourBroadcastReceiver broadcastReceiver;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        broadcastReceiver = new YourBroadcastReceiver();

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            registerReceiver(broadcastReceiver, new IntentFilter(ConnectivityManager.CONNECTIVITY_ACTION));
        } else {
            registerReceiver(broadcastReceiver, new IntentFilter("android.net.conn.CONNECTIVITY_CHANGE"));
        }
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        unregisterReceiver(broadcastReceiver);
    }
}

通过以上步骤,你应该能够在Android Oreo及以上版本中正确使用AlarmManager和BroadcastReceiver。

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