Broadcast的使用

1.发送方：

private final static String SCROLL_TO_POSITION = "scroll_to_position";

//发送Broadcast
Intent intent = new Intent();
				
intent.putExtra("POSITION", position);
				
intent.setAction(SCROLL_TO_POSITION);
				
myContext.sendBroadcast(intent);

 2.接收方：

private final static String SCROLL_TO_POSITION = "scroll_to_position";
	
private BroadcastReceiverForListView myBroadcastReceiverForListView;	


//注册监听

@Override
	public void onCreate()
	{
		super.onCreate();
		
		
                IntentFilter intentFilter = new IntentFilter();
		
		intentFilter.addAction(SCROLL_TO_POSITION);

               myBroadcastReceiverForListView = new BroadcastReceiverForListView();

               this.registerReceiver(myBroadcastReceiverForListView, intentFilter);
        }

//取消监听
@Override
	public void onDestroy()
	{
		super.onDestroy();
		
		this.unregisterReceiver(myBroadcastReceiverForListView);
	}


//定义一个内部类实现对SCROLL_TO_POSITION消息的接收和处理
	private class BroadcastReceiverForListView extends BroadcastReceiver
	{

		@Override
		public void onReceive(Context context, Intent intent)
		{
			
			String action = intent.getAction();
			
			int position = intent.getIntExtra("POSITION", -1);
			
			if(action.equals(SCROLL_TO_POSITION) && position != -1)
			{
				System.out.println("哥接收到SCROLL_TO_POSITION通知啦！");
				
//				lvOfCallLogs.scrollTo(position, position);
				
				lvOfCallLogs.setSelection(position);
			}
			
		}
    }