Question

我不了解如何在两个片段之间传输数据。我试过这个：

public class Connection extends Fragment
{
 SendMessage sender;
 public interface SendMessage
{
 public void send(String one, String two);
}
public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState)
{
  //my data  
}
public void onActivityCreated(Bundle savedInstanceState)
{
    super.onActivityCreated(savedInstanceState);
    send = (SendMessage) getActivity();
}

private class AlarmReceiver extends BroadcastReceiver
{
    public void onReceive(final Context context, Intent intent)
    {
      if(message.equals("POS"))
      {
       sender.send(position,id);
      }
    }
  }

在第一个片段中;在MainActivity中：

public class MainActivity extends FragmentActivity implements      Connection.SendMessage
{
 protected void onCreate(Bundle savedInstanceState)
 {  
  //my code
 }

  @Override
  public void send(String one, String two) 
  {
   Map map = new Map();
   final Bundle bundle = new Bundle(); 
   bundle.putString("Position",one);
   bundle.putString("ID:",two);
   map.setArguments(bundle);
  }
}

并在Map片段中（它需要接收此数据）：

public class Map extends Fragment
{
 public View onCreateView(final LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{ 
 Bundle bundle = new Bundle();
 bundle.getArguments();

 if (bundle != null)
 {
  String pos = bundle.getString("Position");
  String id = bundle.getString("ID");
 }
  //then show this on googleMaps
 }
}

但我不明白为什么这段代码不起作用。你能帮助我吗？感谢...

Answer 1

1）请将您的类名从Map.java更改为其他任何内容。因为在java中将map导入为java.util Package。

2）

Fragment map = new Fragment ();
   final Bundle bundle = new Bundle(); 
   bundle.putString("Position",one);
   bundle.putString("ID:",two);
   map.setArguments(bundle);
map.setArguments(arguments);
getSupportFragmentManager().beginTransaction()
.replace(R.id.item_detail_container, map).commit();

并收到

 Bundle bundle = getArguments();
    if (bundle != null)
     {
      String pos = bundle.getString("Position");
      String id = bundle.getString("ID:"); (You miss : in ID)
     }

Answer 2

执行此发送片段

String cid=id.getText().toString();
Fragment fr=new friendfragment();
FragmentManager fm=getFragmentManager();
android.app.FragmentTransaction ft=fm.beginTransaction();
Bundle args = new Bundle();
args.putString("CID", cid);
fr.setArguments(args);

ft.commit();

收到片段

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
    Bundle savedInstanceState) {
String strtext = getArguments().getString("CID");    
return inflater.inflate(R.layout.fragment, container, false);
  }

Answer 3

嗯，首先。您的接收片段实际上正在访问一个空包。你这样做：

Bundle bundle = new Bundle();
bundle.getArguments();

而不是：

Bundle bundle = getArguments();

其次，两个片段之间通信的好方法是使用接口。界面使用第二个片段与活动和活动进行通信。这是谷歌的教程：

http://developer.android.com/training/basics/fragments/communicating.html

此外，您似乎没有为Map Fragment夸大任何xml布局文件，甚至在创建它之后将其与FragmentTransaction一起添加。这是一个简短而又甜蜜的教程：

http://android-er.blogspot.com/2011/12/programmatically-add-fragment.html

从片段到片段发送两个字符串

3 个答案: