Fragment信息交互之Fragment获取DialogFragment的返回数据

转自：http://blog.csdn.net/xiaoleiacmer/article/details/51066110

Fragment信息交互会出现使用一个Fragment点击触发DialogFragment，并将信息数据返回到开始的Fragment中的情况。这种情况无法再使用startActivityforResult，所以可以使用setTargetFragment（），以及getTargetFragment().onActivityResult（）的方式来进行收发数据。

ContentFragment是依附在ContentActivity上的Fragment,点击ContentFragment中的按钮后，会跳出DialogFragment，此时DialogFragment与ContentFragment是同一个Activity。

关键代码：
1 在ContentFragment设置目标Fragment

EvaluateDialog evaluateDialog = new EvaluateDialog();                  //设置目标Fragment                  evaluateDialog.setTargetFragment(ContentFragment.this, REUEST_CODDE);  evaluateDialog.show(getFragmentManager(), "evaluate_dialog");  

2 在DialogFragment设置返回数据：

protected void setData(String str) {      if(getTargetFragment()==null)      {          return ;      }      Intent intent = new Intent();      intent.putExtra(REQUESE, EvaluteArg[mWhich]);      //获得目标Fragment,并将数据通过onActivityResult放入到intent中进行传值      getTargetFragment().onActivityResult(ContentFragment.REUEST_CODDE, Activity.RESULT_OK, intent);  }

3 在ContentFragment对返回数据进行接收解析：

@Override      public void onActivityResult(int requestCode, int resultCode, Intent data) {          // TODO Auto-generated method stub          super.onActivityResult(requestCode, resultCode, data);          if(requestCode==REUEST_CODDE)          {              String stringExtra = data.getStringExtra(EvaluateDialog.REQUESE);              System.out.println("stringExtra :"+stringExtra);          }      }  

ContentFragment：

package com.example.fragmentdialog;  import android.app.Fragment;  import android.content.Intent;  import android.os.Bundle;  import android.view.LayoutInflater;  import android.view.View;  import android.view.View.OnClickListener;  import android.view.ViewGroup;  import android.widget.Button;  public class ContentFragment extends Fragment {      protected static final int REUEST_CODDE = 0;      @Override      public void onCreate(Bundle savedInstanceState) {          // TODO Auto-generated method stub          super.onCreate(savedInstanceState);      }      @Override      public View onCreateView(LayoutInflater inflater, ViewGroup container,              Bundle savedInstanceState) {          // TODO Auto-generated method stub          View view = inflater.inflate(R.layout.content_fragment, null);          Button btn = (Button)view.findViewById(R.id.btn_fragment);          btn.setOnClickListener(new OnClickListener() {              @Override              public void onClick(View v) {                  System.out.println("123");                  EvaluateDialog evaluateDialog = new EvaluateDialog();                  //设置目标Fragment                  evaluateDialog.setTargetFragment(ContentFragment.this, REUEST_CODDE);                  evaluateDialog.show(getFragmentManager(), "evaluate_dialog");              }          });          return view;      }      /**      * 接收返回参数      */      @Override      public void onActivityResult(int requestCode, int resultCode, Intent data) {          // TODO Auto-generated method stub          super.onActivityResult(requestCode, resultCode, data);          if(requestCode==REUEST_CODDE)          {              String stringExtra = data.getStringExtra(EvaluateDialog.REQUESE);              System.out.println("stringExtra :"+stringExtra);          }      }  }  

DialogFragment：

package com.example.fragmentdialog;  import android.app.Activity;  import android.app.AlertDialog;  import android.app.Dialog;  import android.app.DialogFragment;  import android.content.DialogInterface;  import android.content.DialogInterface.OnClickListener;  import android.content.Intent;  import android.os.Bundle;  import android.widget.TextView;  public class EvaluateDialog extends DialogFragment {      public String[] EvaluteArg = new String[] { "GOOD", "BAD", "NORMAL" };      private int mWhich;      public static final String REQUESE="RESOIBSE";      @Override      public Dialog onCreateDialog(Bundle savedInstanceState) {          AlertDialog.Builder buidler = new AlertDialog.Builder(getActivity());          // 直接设置内容模式          TextView textView = new TextView(getActivity());          buidler.setView(textView);          buidler.setItems(EvaluteArg, new OnClickListener() {              @Override              public void onClick(DialogInterface dialog, int which) {                  mWhich = which;                  System.out.println("内容 ：" + EvaluteArg[which]);                  System.out.println("当前点击项： " + which);                  setData(EvaluteArg[which]);              }          });          return buidler.create();      }      protected void setData(String str) {          if(getTargetFragment()==null)          {              return ;          }          Intent intent = new Intent();          intent.putExtra(REQUESE, EvaluteArg[mWhich]);          //获得目标Fragment,并将数据通过onActivityResult放入到intent中进行传值          getTargetFragment().onActivityResult(ContentFragment.REUEST_CODDE, Activity.RESULT_OK, intent);      }  }  

ContentActivity：

package com.example.fragmentdialog;  import android.app.Activity;  import android.app.FragmentManager;  import android.app.FragmentTransaction;  import android.os.Bundle;  import android.view.Menu;  import android.view.MenuItem;  public class ContentActivity extends Activity {      @Override      protected void onCreate(Bundle savedInstanceState) {          super.onCreate(savedInstanceState);          setContentView(R.layout.activity_main);          InitContentFragment();      }      private void InitContentFragment() {          FragmentManager fragmentManager = getFragmentManager();          FragmentTransaction transaction = fragmentManager.beginTransaction();          ContentFragment contentFragment = new ContentFragment();          transaction.replace(R.id.fl_content, contentFragment);          transaction.commit();      }  }