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;
   }
}