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FragmentA启动FragmentB,做一些选择操作后，返回FragmentA，需要把FragmentB里面选择的数据传回来。有什么办法？
Fragment之间不能直接通信，必须通过Activity来完成，具体步骤。
1. 在FragmentA中定义接口通信接口，通过该接口向Activity发送数据。
public class FragmentA extends Fragment { private onButtonPressListener mListener; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View view = inflater.inflate(R.layout.fragment_linmo_select_beitie, container, false); listView.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { mListener.onOKButtonPressed(selectedBeitie); } }); return view; } @Override public void onAttach(Activity activity) { super.onAttach(activity); try { mListener = (onButtonPressListener) activity; } catch (ClassCastException e) { throw new ClassCastException(activity.toString() + " must implement onOkButtonPressed"); } } public interface onButtonPressListener { void onOKButtonPressed(LinmoBeitieItem item); } }
2. 在Activity中实现该接口，并通过该接口向FragmentB传递数据。
public class MainActivity extends Activity implements FragmentA.onButtonPressListener { @Override public void onOKButtonPressed(LinmoBeitieItem item) { FragmentB fragmentB = （FragmentB）getFragmentManager().findFragmentById(R.id.container); fragmentB.onBeitieSelected(item); } }
3. FragmentB接收到数据并处理。
public class FragmentA extends Fragment { public void onBeitieSelected(LinmoBeitieItem item) { // ... } }
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原文地址：http://www.cnblogs.com/graphics/p/5151547.html
