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

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);
}
}

本例代码：http://download.csdn.net/detail/xiaoleiacm/9481784

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();

}

}