How to execute a command?

Question

Java

I don't understand how to run this code

tv1=(TextView)findViewById(R.id.tv1);
    String str = ((EditText)findViewById(R.id.et1)).getText().toString();
    
    tv1.setText(str + "\n" );

Here:

public class AlarmManagerBroadcastReceiver extends BroadcastReceiver{
 
  final public static String ONE_TIME="onetime";
  
@Override
public void onReceive(Context context, Intent intent){
PowerManager pm=(PowerManager) context.getSystemService(Context.POWER_SERVICE);
PowerManager.WakeLock wl= pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK,"YOUR TAG");


//Осуществляем блокировку
wl.acquire();

  
// Как я понимаю код должен быть здесь, но он здесь подчеркивает findViewById



//Разблокируем поток.*/
wl.release();
}

  
public void SetAlarm(Context context)
{
AlarmManager am=(AlarmManager)context.getSystemService(Context.ALARM_SERVICE);
Intent intent=new Intent(context, AlarmManagerBroadcastReceiver.class);
intent.putExtra(ONE_TIME, Boolean.FALSE);//Задаем параметр интента
PendingIntent pi= PendingIntent.getBroadcast(context,0, intent,0);

  Calendar cal = Calendar.getInstance();
    cal.set(Calendar.HOUR_OF_DAY, 00);
    cal.set(Calendar.MINUTE, 03);
    cal.set(Calendar.SECOND, 10);
  
  am.set(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), pi);
}

I feel that the solution is simple, but I still do not understand how and what to where ....

Answer 1

it doesn't work that way.
by the time the alarm goes off, the activity can simply be destroyed.
get some kind of storage, change the value in it from the broadcast receiver, then signal in the activity so that it reads the value from the storage.
this is one of the options. TIMTOWTDI, for real ;)