Hibernate实战_笔记18（基于注解的元数据）

浏览数：227 / 时间：2015年06月20日

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最近入了一部Neuxs 5，昨天因为开会的时候手机经常收到短信，想静音按音量键关的确是媒体音量！在通知栏里也找不到快速切换按钮。于是萌生了自己写一个桌面widget来快速切换响铃模式的想法。

首先，要创建一个widget。网上搜了一下，方法很普遍。只要实现onUpdate方法，使用pendingIntent发送广播，本地再接收广播执行切换响铃模式即可。代码如下：

public void onUpdate(Context context, AppWidgetManager appWidgetManager,
			int[] appWidgetIds) {

		Intent prevInten_ring = new Intent("RING");
		Intent prevInten_vibrate = new Intent("VIBRATE");
		Intent prevInten_silent = new Intent("SILENT");

		PendingIntent Pprevintent_ring = PendingIntent.getBroadcast(context, 0,
				prevInten_ring, 0);
		PendingIntent Pprevintent_vibrate = PendingIntent.getBroadcast(context,
				0, prevInten_vibrate, 0);
		PendingIntent Pprevintent_silent = PendingIntent.getBroadcast(context,
				0, prevInten_silent, 0);

		views = new RemoteViews(context.getPackageName(), R.layout.widget);

		AudioManager mAudioManager = (AudioManager) context
				.getSystemService(Context.AUDIO_SERVICE);

		int mode = mAudioManager.getRingerMode();

		if (mode == AudioManager.RINGER_MODE_NORMAL) {
			views.setImageViewResource(R.id.iv_ring, R.drawable.ring_green);
			views.setImageViewResource(R.id.iv_silent, R.drawable.silent_grey);
			views.setImageViewResource(R.id.iv_vibrate, R.drawable.vibrate_grey);
		}
		if (mode == AudioManager.RINGER_MODE_SILENT) {
			views.setImageViewResource(R.id.iv_ring, R.drawable.ring_grey);
			views.setImageViewResource(R.id.iv_silent, R.drawable.silent_green);
			views.setImageViewResource(R.id.iv_vibrate, R.drawable.vibrate_grey);
		}
		if (mode == AudioManager.RINGER_MODE_VIBRATE) {
			views.setImageViewResource(R.id.iv_ring, R.drawable.ring_grey);
			views.setImageViewResource(R.id.iv_silent, R.drawable.silent_grey);
			views.setImageViewResource(R.id.iv_vibrate,
					R.drawable.vibrate_green);

		}

		views.setOnClickPendingIntent(R.id.iv_ring, Pprevintent_ring);
		views.setOnClickPendingIntent(R.id.iv_silent, Pprevintent_silent);
		views.setOnClickPendingIntent(R.id.iv_vibrate, Pprevintent_vibrate);
		appWidgetManager.updateAppWidget(appWidgetIds, views);
	}

上段代码中，在设置点击事件时需要注意一定要添加

appWidgetManager.updateAppWidget(appWidgetIds, views);

方法，否则点击事件不会生效。

其次，需要实现onRevieve()方法，代码如下：

public void onReceive(Context context, Intent intent) {
		super.onReceive(context, intent);

		AudioManager mAudioManager = (AudioManager) context
				.getSystemService(Context.AUDIO_SERVICE);
		if (intent.getAction().equals("RING")) {
			mAudioManager.setRingerMode(AudioManager.RINGER_MODE_NORMAL);
			refreshUI(context, R.id.iv_ring, R.drawable.ring_green);
			refreshUI(context, R.id.iv_silent, R.drawable.silent_grey);
			refreshUI(context, R.id.iv_vibrate, R.drawable.vibrate_grey);
			Toast.makeText(context,
					context.getResources().getText(R.string.ring),
					Toast.LENGTH_SHORT).show();
		}

		if (intent.getAction().equals("VIBRATE")) {
			mAudioManager.setRingerMode(AudioManager.RINGER_MODE_VIBRATE);
			refreshUI(context, R.id.iv_ring, R.drawable.ring_grey);
			refreshUI(context, R.id.iv_silent, R.drawable.silent_grey);
			refreshUI(context, R.id.iv_vibrate, R.drawable.vibrate_green);

			Toast.makeText(context,
					context.getResources().getText(R.string.vibrate),
					Toast.LENGTH_SHORT).show();
			
			Vibrator vb = (Vibrator) context
					.getSystemService(Service.VIBRATOR_SERVICE);
			vb.vibrate(300);
		}
		if (intent.getAction().equals("SILENT")) {
			mAudioManager.setRingerMode(AudioManager.RINGER_MODE_SILENT);
			refreshUI(context, R.id.iv_ring, R.drawable.ring_grey);
			refreshUI(context, R.id.iv_silent, R.drawable.silent_green);
			refreshUI(context, R.id.iv_vibrate, R.drawable.vibrate_grey);
			
			Toast.makeText(context,
					context.getResources().getText(R.string.silent),
					Toast.LENGTH_SHORT).show();
		}
	}

这样就大工告成了。