Android AlarmManager使用铃声启动服务

Question

I am working on Alarm Manager. I used a service to start and will ring a tone. But the service is not starting. Can anyone suggest about service, Pending Intent and identify the error in my code. The code is copied from net.

This is my AndroidScheduledActivity.java

public class AndroidScheduledActivity extends Activity {

    private PendingIntent pendingIntent;

    /** Called when the activity is first created. */

    @Override
    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        Button buttonStart = (Button) findViewById(R.id.startalarm);

        Button buttonCancel = (Button) findViewById(R.id.cancelalarm);

        buttonStart.setOnClickListener(new Button.OnClickListener() {

            @Override
            public void onClick(View arg0) {

                // TODO Auto-generated method stub

                Intent myIntent = new Intent(AndroidScheduledActivity.this,
                        MyAlarmService.class);

                pendingIntent = PendingIntent.getService(AndroidScheduledActivity.this,
                        0, myIntent, 0);

                AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);

                Calendar calendar = Calendar.getInstance();

                calendar.setTimeInMillis(System.currentTimeMillis());

                calendar.add(Calendar.SECOND, 10);

                alarmManager.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(),
                        pendingIntent);

                Toast.makeText(AndroidScheduledActivity.this, "Start Alarm",
                        Toast.LENGTH_LONG).show();
                Log.d("Alarm", "Alarm Started");

            }
        });

        buttonCancel.setOnClickListener(new Button.OnClickListener() {

            @Override
            public void onClick(View arg0) {

                // TODO Auto-generated method stub

                AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);

                alarmManager.cancel(pendingIntent);

                // Tell the user about what we did.

                Toast.makeText(AndroidScheduledActivity.this, "Cancel!",
                        Toast.LENGTH_LONG).show();

            }
        });

    }
}

And this is my MyAlarmService.java

public class MyAlarmService extends Service {

    @Override
    public void onCreate() {

        // TODO Auto-generated method stub

        Toast.makeText(this, "MyAlarmService.onCreate()", Toast.LENGTH_LONG).show();

    }

    @Override
    public IBinder onBind(Intent intent) {

        // TODO Auto-generated method stub

        Toast.makeText(this, "MyAlarmService.onBind()", Toast.LENGTH_LONG).show();

        return null;

    }

    @Override
    public void onDestroy() {

        // TODO Auto-generated method stub

        super.onDestroy();

        Toast.makeText(this, "MyAlarmService.onDestroy()", Toast.LENGTH_LONG).show();

    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {

        Log.d("AlarmService", "Alarm Starting to ring");

        Uri alert = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
        MediaPlayer mp = MediaPlayer.create(getBaseContext(), alert);
        mp.setVolume(100, 100);
        mp.start();
        mp.setOnCompletionListener(new OnCompletionListener() {

            @Override
            public void onCompletion(MediaPlayer mp) {
                mp.release();
            }
        });

        Vibrator vibrator = (Vibrator) getSystemService(VIBRATOR_SERVICE);
        vibrator.vibrate(400);

        Toast.makeText(this, "MyAlarmService.onStart()", Toast.LENGTH_LONG).show();

        return Service.START_STICKY;

    }

    @Override
    public boolean onUnbind(Intent intent) {

        // TODO Auto-generated method stub

        Toast.makeText(this, "MyAlarmService.onUnbind()", Toast.LENGTH_LONG).show();

        return super.onUnbind(intent);

    }

}

And my menifest.xml file

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.alarm_basic"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="17" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.example.alarm_basic.AndroidScheduledActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <service android:name=".MyAlarmService" />
    </application>

</manifest>

Answer 1

Also need to check wheather Ringtone is null also.

 Uri alert = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_ALARM);
 Ringtone r = RingtoneManager.getRingtone(getBaseContext(), alert);

 if(r == null){

     alert = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
     r = RingtoneManager.getRingtone(getBaseContext(), alert);

     if(r == null){  
         alert = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_RINGTONE);
         r = RingtoneManager.getRingtone(getBaseContext(), alert);               
     }
 }
if(r != null)
    r.play();

Or otherway

MediaPlayer mp = MediaPlayer.create(getBaseContext(), alert);
    if(mp !=null) {    
        mp.setVolume(100, 100);
        mp.start();
        mp.setOnCompletionListener(new OnCompletionListener() {

            @Override
            public void onCompletion(MediaPlayer mp) {
                mp.release();
            }
        });
    }

Answer 2

Intent intent = new Intent(DashboardScreen.this, ServiceClass.class);
PendingIntent pintent = PendingIntent.getService(DashboardScreen.this, 0, intent, 0);
AlarmManager alarm = (AlarmManager)getSystemService(Context.ALARM_SERVICE);
alarm.setRepeating(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), 30*1000, pintent);

Try it, and let me know what happen...

In your manifest.xml file

 <service android:enabled="true" android:name=".ServiceClass" />

Answer 3

1. Add a permission in your Manifest file

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

2. Should check vibrator is null or not.

    Vibrator vibrator = (Vibrator) getSystemService(VIBRATOR_SERVICE); if (vibrator != null) vibrator.vibrate(400);