Android 重启后在接收器中获得额外的

Question

我正在开发一个提醒用户的应用程序。它运行良好，但是当我设置它并重新启动设备时 returns 收到通知时为空。我认为问题出在广播接收器上。因为无法从 intent extra 中获取任何字符串。

--在activity--

private void setAlarm() {
    Intent myIntent = new Intent(this, AlarmReceiver.class);
    String data = descripton.getText().toString();
    Bundle b = new Bundle();
    b.putString("notify_message", data);
    myIntent.putExtras(b);
    pendingIntent = PendingIntent.getBroadcast(this, 0, myIntent,
            PendingIntent.FLAG_CANCEL_CURRENT);
    AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
    alarmManager.set(AlarmManager.RTC, cal.getTimeInMillis(), pendingIntent);
}

-- 清单 --

 <receiver  android:name=".ekstra.AlarmReceiver"
            android:enabled="true"
            android:exported="true"
            android:label="StartMyServiceAtBootReceiver">
            <intent-filter>
            <action android:name="android.intent.action.BOOT_COMPLETED" />
            </intent-filter>
        </receiver>

--广播接收器--

@Override
public void onReceive(Context context, Intent intent) {
    try {
        Bundle extras = intent.getExtras();
        //Afret reboot test1 and test2 is null
        String test1 = extras.getString("notify_message");
        String test2 = intent.getStringExtra("notify_message");
        Intent newIntent = new Intent(context, RemindingService.class);
        newIntent.putExtra("messaage", message);
        context.startService(newIntent);
    } catch (Exception e) {
        Log.e("Test", "error " + e.toString());
    }
}

Answer 1

如上所述，重启后您将收不到广播。但是在这里，如果您在引导完成时调用相同的 AlarmReceiver，这是由系统广播的那么那里，下面将 return null

String test1 = extras.getString("notify_message");//test1 is null

或

String test2 = intent.getStringExtra("notify_message");//test2 is null

（两个调用是等价的）

因此，您应该根据 Receiver 是在启动后调用还是由于 Alarm 调用来执行您的逻辑。你可以在你的 AlarmReceiver 中做这样的事情：

String msg = intent.getStringExtra("notify_message");
if(msg==null){
      //means that receiver started after boot
      // write your logic here
}else{
      //means that receiver started by alarm
      //write your logic here
}

Android 重启后在接收器中获得额外的

Android get extra in receiver after reboot

android

reboot

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