Broadcast调用Service做的一个定时器

1.

public class AlarmActivity extends Activity implements OnClickListener {
	private Button b_call_service, b_exit_service;
	private Intent intent;
	private PendingIntent p_intent;
	
	public void onCreate(Bundle icicle) {
		super.onCreate(icicle);
		setContentView(R.layout.main);
		b_call_service = (Button) findViewById(R.id.call_alarm_service);
		b_call_service.setOnClickListener(this);
		b_exit_service = (Button) findViewById(R.id.exit);
		b_exit_service.setOnClickListener(this);
		
		intent = new Intent(this, AlarmReceiver.class);
		p_intent = PendingIntent.getBroadcast(this, 0, intent, 0);
	}

	public void onClick(View arg0) {
		if (arg0 == b_call_service) {
			setTitle("Waiting... 5s后Alarm启动");
			
			Calendar calendar = Calendar.getInstance();
			calendar.setTimeInMillis(System.currentTimeMillis());
			calendar.add(Calendar.SECOND, 5);

			AlarmManager am = (AlarmManager) getSystemService(ALARM_SERVICE);
			am.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), p_intent);
		}

		if (arg0 == b_exit_service) {
			setTitle("Alarm关闭");
			AlarmManager am = (AlarmManager) getSystemService(ALARM_SERVICE);
			am.cancel(p_intent);
		}
	}
}

public class AlarmReceiver extends BroadcastReceiver {
	
	public void onReceive(Context context, Intent i) {
		context.startService(new Intent(context, AlarmService.class));
	}
}

public class AlarmService extends Service {
	public IBinder onBind(Intent intent) {
		return null;
	}
	public void onCreate() {
		// 只在创建时执行一次
	}
	public void onStart(Intent intent, int startId) {
		// 可执行多次
		Toast.makeText(this, "hello 土豆", Toast.LENGTH_LONG).show();
	}
}

<application android:icon="@drawable/icon" android:label="@string/app_name">
	<activity android:name="AlarmActivity" android:label="@string/app_name">
		<intent-filter>
			<action android:name="android.intent.action.MAIN" />
			<category android:name="android.intent.category.LAUNCHER" />
		</intent-filter>
	</activity>
	<receiver android:name="AlarmReceiver" />
	<service android:name="AlarmService" />
</application>

 

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