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今天我遇到一个问题，就是在activity中需要动态改变fragment中的控件，以前看到过可以在activity中得到fragment实例，然后修改控件；
今天实验了一个新的办法，通过新的办法，就是通过本地广播；
1.在Fragment中编写广播接收器
public class ShouYeFragment extends Fragment {
private ListView listView;
private List<BoWen> list=new ArrayList<BoWen>();
private BoWenAdapter adapter;
private WeiBoDataBase weiBoDataBase=WeiBoDataBase.getInstance(getContext());
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
super.onCreateView(inflater, container, savedInstanceState);
View view=inflater.inflate(R.layout.shouye_view,container,false);
listView= (ListView) view.findViewById(R.id.bowen_list);
return view;
}
public List<BoWen> getBoWen(){
List<BoWen> list1=new ArrayList<BoWen>();
List<String> bPhone=weiBoDataBase.getBPhone(MainActivity.getYonghuming());
for (String bphone: bPhone){
for(BoWen boWen:weiBoDataBase.getBoWen(bphone)){
list1.add(boWen);
}
}
return list1;
}
public class ShouYeBroadCastReceiver extends BroadcastReceiver{
@Override
public void onReceive(Context context, Intent intent) {
list=getBoWen();
adapter=new BoWenAdapter(getContext(),R.layout.bowen_view,list);
listView.setAdapter(adapter);
}
}
}
在activity中注册发送本地广播
public class MainActivity extends FragmentActivity {
private ShouYeFragment shouYeFragment;
private FragmentManager manager;
private FragmentTransaction transaction;
private LocalBroadcastManager broadcastManager;
private ShouYeFragment.ShouYeBroadCastReceiver shouYeBroadCastReceiver;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main_view);
shouYeFragment=new ShouYeFragment();
manager=getSupportFragmentManager();
broadcastManager = LocalBroadcastManager.getInstance(this);
shouYeBroadCastReceiver=shouYeFragment.new ShouYeBroadCastReceiver();
IntentFilter intentFilter = new IntentFilter();
intentFilter.addAction("android.intent.action.ShouYe_BROADCAST");
broadcastManager.registerReceiver(shouYeBroadCastReceiver, intentFilter);
transaction=manager.beginTransaction();
transaction.add(R.id.zhuyaoneirong_layout,shouYeFragment);
transaction.addToBackStack(null);
transaction.commit();
init();
}
private void init(){
Intent intent1=new Intent("android.intent.action.ShouYe_BROADCAST");
broadcastManager.sendBroadcast(intent1);
}
@Override
protected void onDestroy() {
super.onDestroy();
broadcastManager.unregisterReceiver(shouYeBroadCastReceiver);
}
}
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原文地址：http://www.cnblogs.com/xujinghuan/p/5837503.html
