Android--Fragment与Activity通信

package com.example.testfragment;

import com.example.testfragment.MainFargment.BackString;

import android.app.Activity;
import android.app.Fragment;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Toast;

public class MainActivity extends Activity implements BackString{

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//静态加载
//Intent intent = new Intent(this,MainActivity2.class);
//startActivity(intent);

MainFargment fargment = new MainFargment();
//对Fragment通信传参数
Bundle bundle = new Bundle();
bundle.putString("name", "Michale");
fargment.setArguments(bundle);
//动态加载 FragmentManager管理者
FragmentManager manager = getFragmentManager();
FragmentTransaction transaction = manager.beginTransaction();
//第一个参数指定目标 动态目标容器
transaction.add(R.id.linearLayout1, fargment, "fargment");
transaction.addToBackStack(null);
transaction.commit();
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}

@Override
public Void WriteString(String code) {
// TODO 自动生成的方法存根
Toast.makeText(this, code, Toast.LENGTH_SHORT).show();
return null;
}
}

package com.example.testfragment;

import android.app.Activity;
import android.os.Bundle;

public class MainActivity2 extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO 自动生成的方法存根
super.onCreate(savedInstanceState);
setContentView(R.layout.fragment_main);
}
}

package com.example.testfragment;

import android.app.Activity;
import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.EditText;

public class MainFargment extends Fragment {
private String name = "hello michale";
public    BackString backString;
public interface BackString
{
public Void WriteString(String code);
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// TODO 自动生成的方法存根
//return super.onCreateView(inflater, container, savedInstanceState);
View view=inflater.inflate(R.layout.userfragment, container, false);
String strName = getArguments().getString("name").toString();
EditText text = (EditText) view.findViewById(R.id.editText1);
text.setText(strName);
backString.WriteString(name);
return view;
}

@Override
public void onAttach(Activity activity) {
// TODO 自动生成的方法存根
backString = (BackString) activity;
super.onAttach(activity);
}
}

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.testfragment.MainActivity" >

<LinearLayout
android:id="@+id/linearLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
</LinearLayout>

</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >

<fragment
android:id="@+id/fragment1"
android:name="com.example.testfragment.MainFargment"
android:layout_width="match_parent"
android:layout_height="match_parent"
/>

</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >

<EditText
android:id="@+id/editText1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
/>

</LinearLayout>