java - 如何将数据从 fragment 发送到 fragment ？

Question

我有 1 个布局。它包含 2 个 fragment 。此布局中有 2 个按钮。当我单击按钮 1 时，将显示 fragment 1。我要单击 TextView 显示“欢迎”的 fragment 1 内容中的按钮，然后单击主布局中的按钮 2，将显示 fragment 2， fragment 2 的 TextView 将显示 fragment 1 的 TextView 的内容。

这是我的代码。请展示并给我一些评论。如何解决这个问题 首先是mainlayout.xml

<?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" >   

<Button
    android:id="@+id/btnFragment1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="fragment1" />

<Button
    android:id="@+id/btnFragment2"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Fragment2" />

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

第一个是fragment1.xml

 <TextView
    android:id="@+id/textView1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="TextView" />

<Button
    android:id="@+id/button1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Button" />

首先是fragment1.java

 public class Fragment1 extends Fragment{

@Override
public void onActivityCreated(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onActivityCreated(savedInstanceState);
}



@Override
public void onAttach(Activity activity) {
    // TODO Auto-generated method stub
    super.onAttach(activity);
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    View view = null;
    view = inflater.inflate(R.layout.fragment1, null);
           //I will get text after I press button and using bundle for storage
             and send send to fragment
    return view;
}

@Override
public void onDestroy() {
    // TODO Auto-generated method stub
    super.onDestroy();
}

@Override
public void onDestroyView() {
    // TODO Auto-generated method stub
    super.onDestroyView();
}

@Override
public void onPause() {
    // TODO Auto-generated method stub
    super.onPause();
}

@Override
public void onResume() {
    // TODO Auto-generated method stub
    super.onResume();
}

@Override
public void onStart() {
    // TODO Auto-generated method stub
    super.onStart();
}

@Override
public void onStop() {
    // TODO Auto-generated method stub
    super.onStop();
}}

首先是fragment2.xml

 <TextView
    android:id="@+id/textView1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="TextView" />

<Button
    android:id="@+id/button1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Button" />  

首先是fragment2.java

public class Fragment2 extends Fragment{
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    return inflater.inflate(R.layout.fragment2, null);
        //In this I am going to using Bundle to get message from fragment1
}}

首先是MainActivity.java

 public class MainActivity extends FragmentActivity {

Button btnFragment1, btnFragment2;
FragmentManager fragmentManager;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    fragmentManager = getSupportFragmentManager();

    btnFragment1 = (Button) findViewById(R.id.btnFragment1);
    btnFragment1.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            FragmentTransaction transaction = fragmentManager.beginTransaction();

            transaction.replace(R.id.container, new Fragment1(), "TAG_FRAGMENT1");
            transaction.addToBackStack(null);
            transaction.commit();
        }
    });

    btnFragment2 = (Button) findViewById(R.id.btnFragment2);
    btnFragment2.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            FragmentTransaction transaction = fragmentManager.beginTransaction();

            transaction.replace(R.id.container, new Fragment2(), "TAG_FRAGMENT2");
            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;
}}

Answer 1

使用接口(interface)作为对activity的回调，然后将数据传递给fragment2

http://developer.android.com/training/basics/fragments/communicating.html

上面链接里有例子