Widget

1.新建一个类，继承AppWidgetProvider

2.配置manifest文件

3.复写方法

public class MyWidget extends AppWidgetProvider{
    //接收到广播时调用
    @Override
    public void onReceive(Context context, Intent intent) {
        super.onReceive(context, intent);
    }


    //每次创建都会调用
    @Override
    public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
        super.onUpdate(context, appWidgetManager, appWidgetIds);
       
    }


    //每次销毁都会调用
    @Override
    public void onDeleted(Context context, int[] appWidgetIds) {
        super.onDeleted(context, appWidgetIds);
    }




    //创建第一个widget时调用
    @Override
    public void onEnabled(Context context) {
        super.onEnabled(context);
    }


    //最后一个widget被销毁时调用
    @Override
    public void onDisabled(Context context) {
        super.onDisabled(context);
       
    }
}

4.创建xml文件

5.创建布局文件

6.获取窗口小部件管理器

AppWidgetManager mAwm = AppWidgetManager.getInstance(this)

7.

		ComponentName provider = new ComponentName(getApplicationContext(), MyWidget.class);
                RemoteViews views = new RemoteViews(getPackageName(), R.layout.process_widget);

                views.setTextViewText(R.id.process_count,text);
             
                Intent intent = new Intent();

		//自定义动作
                intent.setAction("com.example.frog.mobilsafe.ACTION_KILL");
                PendingIntent pendingIntent = PendingIntent.getBroadcast(getApplicationContext(),0,intent,PendingIntent.FLAG_UPDATE_CURRENT);

		//设置点击事件
                views.setOnClickPendingIntent(R.id.btn_clear,pendingIntent);
		//更新窗口小部件UI
                mAwm.updateAppWidget(provider, views);