Question

我正在构建一个通知应用程序，该应用程序使用警报管理器设置多个通知，以提醒用户日常任务，当手机处于开机状态时一切正常，但是当重新启动手机时，会显示通知，但通知数据会显示丢失（例如通知内容），这些数据从我的第一次活动中保存到了意图中这是下面的代码。（我已添加权限并对清单进行了操作）请我帮忙

public class add_rreminde extends AppCompatActivity implements View.OnClickListener{

private int notificationId=1;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_add_rreminde);

    //buton ok
    findViewById(R.id.but).setOnClickListener(this);
    findViewById(R.id.cancel).setOnClickListener(this);
}
@Override
public void onClick(View view){

    EditText remide=findViewById(R.id.edit);
    DatePicker date=findViewById(R.id.date);

    Intent intent=new Intent(add_rreminde.this,AlarmReciver.class);
    intent.putExtra("notificationId",notificationId);
    intent.putExtra("todo",remide.getText().toString());
    final int _id=(int)System.currentTimeMillis();
    PendingIntent alarmIntent=PendingIntent.getBroadcast(add_rreminde.this,_id,intent,PendingIntent.FLAG_ONE_SHOT);

    AlarmManager alarm=(AlarmManager)getSystemService(ALARM_SERVICE);
    switch (view.getId()){
        case(R.id.but):
            int day=date.getDayOfMonth();
            int month=date.getMonth();
            int year=date.getYear();

            //create date
            Calendar startDate=Calendar.getInstance();
            startDate.set(Calendar.DAY_OF_MONTH,day);
            startDate.set(Calendar.MONTH,month);
            startDate.set(Calendar.YEAR,year);
            Long alarmStartDate=startDate.getTimeInMillis();

            //setAlarme
            alarm.set(AlarmManager.RTC_WAKEUP,alarmStartDate,alarmIntent);

            Toast.makeText(getApplicationContext(),"done",Toast.LENGTH_LONG).show();
            break;
        case (R.id.cancel):
            alarm.cancel(alarmIntent);
            Toast.makeText(getApplicationContext(),"canceled",Toast.LENGTH_LONG).show();
            break;
    }


}
  }

我的接收者推送通知

public class AlarmReciver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
    //get id from notification id intent
    int notification =intent.getIntExtra("notificationId",0);
    String getMessage=intent.getStringExtra("todo");

    //when notification is opened open mainActivity
    Intent mainIntent=new Intent(context,add_rreminde.class);
    PendingIntent contentIntent=PendingIntent.getActivity(context,0,mainIntent,0);

    NotificationManager mynotificationManager=(NotificationManager)context.getSystemService(Context.NOTIFICATION_SERVICE);

    //prepare notification
    Notification.Builder builder=new Notification.Builder(context);
    builder.setSmallIcon(R.drawable.assistant)
            .setContentTitle("changer oil")
            .setContentText(getMessage)
            .setWhen(System.currentTimeMillis())
            .setAutoCancel(true)
            .setContentIntent(contentIntent)
            .setPriority(Notification.PRIORITY_MAX)
            .setDefaults(Notification.DEFAULT_ALL);

    //notify
    mynotificationManager.notify(notification,builder.build());

}
}

Answer 1

默认情况下，设备关闭时所有警报将被取消。至防止这种情况的发生，您可以将应用程序设计为如果用户重新启动，则自动重新启动重复警报设备。

因此您可以添加BroadcastReceiver来接收ACTION_BOOT_COMPLETED

首先：

<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>

和：

<receiver android:name=".SampleBootReceiver"
        android:enabled="true">
    <intent-filter>
        <action android:name="android.intent.action.BOOT_COMPLETED"></action>
    </intent-filter>
</receiver>

现在您重新设置设备重启时的警报：

public class SampleBootReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        if (intent.getAction().equals("android.intent.action.BOOT_COMPLETED")) {
            // Set the alarm here.
        }
    }
}

重启手机后报警通知数据消失

1 个答案: