android schedule task to execute at specific time daily

Question

I am wanting to change my ringtone volume at specific time each day. I used a calendar to specify the time, and I am attempting to use alarmManager to execute it. Here is what I have. (I am a noobie go easy on me)

package com.example.ringervolume.app;  import android.app.Activity; import android.app.AlarmManager; import android.app.PendingIntent; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.media.AudioManager; import android.os.Bundle; import android.support.v7.app.ActionBarActivity; import android.view.Menu; import android.view.MenuItem; import android.widget.TextView;  import java.util.Calendar;   public class MainActivity extends ActionBarActivity {       private AudioManager audio;     private PendingIntent pendingIntentam;     private PendingIntent pentdingIntentpm;     @Override     protected void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.activity_main);          TextView textViewTime = (TextView) findViewById (R.id.textTime);         audio = (AudioManager)getSystemService(Context.AUDIO_SERVICE);          //ringer volume for the am.         Calendar calendaram = Calendar.getInstance();          calendaram.set(Calendar.HOUR_OF_DAY, 21);         calendaram.set(Calendar.MINUTE, 32);         calendaram.set(Calendar.SECOND, 0);         calendaram.set(Calendar.AM_PM,Calendar.PM);            Intent myIntent = new Intent(MainActivity.this, MyReceiver.class);         pendingIntentam = PendingIntent.getBroadcast(MainActivity.this, 0,myIntent,0);         AlarmManager alarmManageram = (AlarmManager)getSystemService(ALARM_SERVICE);         alarmManageram.set(AlarmManager.RTC, calendaram.getTimeInMillis(), pendingIntentam);       }      public class MyReceiver extends BroadcastReceiver {          @Override         public void onReceive(Context context, Intent intent) {                 Intent scheduledIntent = new Intent(context, myscheduleactivity.class);             scheduledIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);             context.startActivity(scheduledIntent);          }     }      public class myscheduleactivity extends Activity {          @Override         protected void onCreate(Bundle savedInstanceState) {             super.onCreate(savedInstanceState);             audio.setRingerMode(AudioManager.RINGER_MODE_VIBRATE);         }     }        @Override     public boolean onCreateOptionsMenu(Menu menu) {          // Inflate the menu; this adds items to the action bar if it is present.         getMenuInflater().inflate(R.menu.main, menu);         return true;     }      @Override     public boolean onOptionsItemSelected(MenuItem item) {         // Handle action bar item clicks here. The action bar will         // automatically handle clicks on the Home/Up button, so long         // as you specify a parent activity in AndroidManifest.xml.         int id = item.getItemId();         if (id == R.id.action_settings) {             return true;         }         return super.onOptionsItemSelected(item);     }  } 

Answer 1

To fire alarm everyday, at 21:32

private AlarmManager alarmMgr; private PendingIntent alarmIntent; ... alarmMgr = (AlarmManager)context.getSystemService(Context.ALARM_SERVICE); Intent intent = new Intent(context, AlarmReceiver.class); alarmIntent = PendingIntent.getBroadcast(context, 0, intent, 0);  // Set the alarm to start at 21:32 PM Calendar calendar = Calendar.getInstance(); calendar.setTimeInMillis(System.currentTimeMillis()); calendar.set(Calendar.HOUR_OF_DAY, 21); calendar.set(Calendar.MINUTE, 32);  // setRepeating() lets you specify a precise custom interval--in this case, // 1 day alarmMgr.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(),         AlarmManager.INTERVAL_DAY, alarmIntent); 

In this case, AlarmReceiver is the Broadcast Receiver and it already has a context, so you can directly set the ringer mode to silent from the Broadcast Receiver without starting an activity.

@Override     public void onReceive(Context context, Intent intent) {        AudioManager am = (AudioManager)getSystemService(Context.AUDIO_SERVICE);           am.setRingerMode(AudioManager.RINGER_MODE_SILENT); }   

Please be sure to add these permissions :

<uses-permission android:name="android.permission.WRITE_SETTINGS" ></uses-permission> <uses-permission android:name="android.permission.CHANGE_CONFIGURATION" ></uses-permission> <uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" ></uses-permission>