ContentFragment cf = (ContentFragment) getActivity()  .getFragmentManager().findFragmentById(  R.id.content_fg);  cf.showPro(name);  

@Override
public void onAttach(Activity activity) {  super.onAttach(activity);  if (activity != null) {  cat = (Cat) activity;  }
} 

在fragment需要的地方调用 cat.play();

3 广播   封装的工具类

/*** [A brief description]* <p/>* //在任何地方发送广播* BroadcastManager.getInstance(mContext).sendBroadcast(FindOrderActivity.ACTION_RECEIVE_MESSAGE);* <p/>* //页面在oncreate中初始化广播* BroadcastManager.getInstance(mContext).addAction(ACTION_RECEIVE_MESSAGE, new BroadcastReceiver(){** @author huxinwu* @version 1.0* @Override public void onReceive(Context arg0, Intent intent) {* String command = intent.getAction();* if(!TextUtils.isEmpty(command)){* if((ACTION_RECEIVE_MESSAGE).equals(command)){* //获取json结果* String json = intent.getStringExtra("result");* //做你该做的事情* }* }* }* });* <p/>* //页面在ondestory销毁广播* BroadcastManager.getInstance(mContext).destroy(ACTION_RECEIVE_MESSAGE);* @date 2015-9-17**/
public class BroadcastManager {private Context mContext;private static BroadcastManager instance;private Map<String, BroadcastReceiver> receiverMap;/*** 构造方法** @param context*/private BroadcastManager(Context context) {this.mContext = context;receiverMap = new HashMap<String, BroadcastReceiver>();}/*** [获取BroadcastManager实例，单例模式实现]** @param context* @return*/public static BroadcastManager getInstance(Context context) {if (instance == null) {synchronized (BroadcastReceiver.class) {if (instance == null) {instance = new BroadcastManager(context);}}}return instance;}/*** 添加，定义一个匿名内部类的广播** @param*/public void addAction(String action, BroadcastReceiver receiver) {try {IntentFilter filter = new IntentFilter();filter.addAction(action);mContext.registerReceiver(receiver, filter);receiverMap.put(action, receiver);} catch (Exception e) {e.printStackTrace();}}/*** 发送广播** @param action 唯一码*/public void sendBroadcast(String action) {sendBroadcast(action, "");}/*** 发送广播** @param action 唯一码* @param obj    参数*/public void sendBroadcast(String action, Object obj) {Intent intent = new Intent();intent.setAction(action);intent.putExtra("result", new Gson().toJson(obj));mContext.sendBroadcast(intent);}/*** 发送参数为 String 的数据广播** @param action* @param s*/public void sendBroadcast(String action, String s) {Intent intent = new Intent();intent.setAction(action);intent.putExtra(AppField.result, s);mContext.sendBroadcast(intent);}  public void sendBroadcast(String action, int s) {Intent intent = new Intent();intent.setAction(action);intent.putExtra(AppField.result, s);mContext.sendBroadcast(intent);}/*** 销毁广播** @param action*/public void destroy(String action) {if (receiverMap != null) {BroadcastReceiver receiver = receiverMap.get(action);if (receiver != null) {mContext.unregisterReceiver(receiver);}}}
}