Fragment 和Activity的数据传递实例代码

package com.example.fragment;

import android.os.Bundle;

import android.support.v4.app.FragmentActivity;

import android.support.v4.app.FragmentManager;

import android.support.v4.app.FragmentTransaction;

import android.view.View;

import android.widget.EditText;

import android.widget.TextView;

public class MainActivity extends FragmentActivity {

   private Fragment01 f1;

   private EditText   etContent;

   private TextView   tv;

   @Override

   protected void onCreate(Bundle savedInstanceState) {

      super.onCreate(savedInstanceState);

      setContentView(R.layout.activity_main);

      etContent = (EditText) findViewById(R.id.et_conent);

      tv = (TextView) findViewById(R.id.tv);

      // 1. 创建fragment对象

      ragment01 f1 = new Fragment01();

      // 2. 获取fragment管理器

      FragmentManager fm = this.getSupportFragmentManager();

      // 3. 获取事务

      FragmentTransaction ft = fm.beginTransaction();

      // 4. 设置布局

      ft.replace(R.id.fl, f1);

      // 5. 提交

      ft.commit();

   }

   /**

    * 给textview设置fragment02传递过来的数据

    */

   public void setText(String text){

      tv.setText(text);

   }

   /**

    * 获取fragment01对象，调用给textview设置数据的方法

    */

   public void send(View v){

      String text = etContent.getText().toString().trim();

      f1.setText(text); //将数据传递给fragment

   }

   public void message(View v){

      // 1. 创建fragment对象

      f1 = new Fragment01();

      // 2. 获取fragment管理器

      FragmentManager fm = this.getSupportFragmentManager();

      // 3. 获取事务

      FragmentTransaction ft = fm.beginTransaction();

      // 4. 设置布局

      ft.replace(R.id.fl, f1);

      // 5. 提交

      ft.commit();

   }

}

---

package com.example.fragment;

import android.os.Bundle;

import android.support.v4.app.Fragment;

import android.view.LayoutInflater;

import android.view.View;

import android.view.View.OnClickListener;

import android.view.ViewGroup;

import android.widget.Button;

import android.widget.EditText;

/**

* 联系人

*/

public class Fragment02 extends Fragment {

   @Override

   public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {

      View view = inflater.inflate(R.layout.fragment_contacts, null);

      final EditText etContent = (EditText) view.findViewById(R.id.et_conent);

      Button btn = (Button) view.findViewById(R.id.btn);

      //设置按钮的点击事件

      btn.setOnClickListener(new OnClickListener() {

         @Override

         public void onClick(View v) {

            String text = etContent.getText().toString().trim();

            //获取f2所依附的activity的对象

            MainActivity activity = (MainActivity) getActivity();

           activity.setText(text);//将数据传递给activity中

         }

      });

      return view;

   }

}