Fragment切换页面

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:orientation="vertical" >        <FrameLayout         android:id="@+id/container"        android:layout_width="fill_parent"        android:layout_height="0dp"        android:layout_weight="1"/>        <LinearLayout         android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:orientation="horizontal">        <Button            android:id="@+id/a"            android:onClick="click"            android:layout_width="fill_parent"            android:layout_height="wrap_content"            android:layout_weight="1"            android:text="Fragment A"/>         <Button             android:id="@+id/b"            android:onClick="click"            android:layout_width="fill_parent"            android:layout_height="wrap_content"            android:layout_weight="1"            android:text="Fragment B"/>    </LinearLayout>    </LinearLayout>

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FragmentActivity.java

package com.zyf;import android.os.Bundle;import android.support.v4.app.Fragment;import android.support.v4.app.FragmentManager;import android.support.v4.app.FragmentTransaction;import android.view.View;import android.widget.FrameLayout;/** * fragment 使用实例 * @see http://developer.android.com/training/basics/fragments/fragment-ui.html *  * 3.0不需要继承FragmentActivity，因为3.0将比如getFragmentManager()方法已经加入到Activity中了。 *  * 3.0以前版本要通过继承FragmentActivity获得类似功能。 */public class FragmentActivity extends android.support.v4.app.FragmentActivity {        FragmentManager fragmentManager;    FrameLayout container;    FragmentA a;    FragmentB b;         @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);                setContentView(R.layout.main);                // 得到框架布局控件        container = (FrameLayout)findViewById(R.id.container);                // 返回与此活动相关的片段进行交互的FragmentManager        fragmentManager = this.getSupportFragmentManager();                // 通过begintransaction方法获取一个事物处理实例。        FragmentTransaction mFragmentTransaction = fragmentManager.beginTransaction();                a = new FragmentA();        b = new FragmentB();                /** 在这期间可以使用 add(), remove(), 以及  replace(). 最终需要改变时执行 commit()即可 */         mFragmentTransaction.add(R.id.container, a);        mFragmentTransaction.commit();    }        public void click(View view) {        switch (view.getId()) {            case R.id.a: // 按钮A                show(a);                break;            case R.id.b: // 按钮B                show(b);                break;            default:                break;        }    }    private void show(Fragment frament) {        FragmentTransaction mFragmentTransaction = getSupportFragmentManager().beginTransaction();        mFragmentTransaction.replace(R.id.container, frament);        mFragmentTransaction.addToBackStack(null);       // mFragmentTransaction.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);//设置动画效果        mFragmentTransaction.commit();    }}

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FragmentA.java

package com.zyf;import android.content.Intent;import android.os.Bundle;import android.support.v4.app.Fragment;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.Button;public class FragmentA extends Fragment {    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);    }    @Override    public View onCreateView(LayoutInflater inflater, ViewGroup container,            Bundle savedInstanceState) {                    View view = inflater.inflate(R.layout.fa, container, false);                // "AAAAAAAAAAAAA"按钮        Button btn = (Button)view.findViewById(R.id.next);        btn.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                Intent intent = new Intent(Intent.ACTION_VIEW);                startActivity(intent);            }        });        return view;    }    //    public void next(View view) {//        Intent intent = new Intent(Intent.ACTION_VIEW);//        startActivity(intent);//    }}

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FragmentB.java

package com.zyf;import android.os.Bundle;import android.support.v4.app.Fragment;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;public class FragmentB extends Fragment {    @Override    public void onCreate(Bundle savedInstanceState) {        // TODO Auto-generated method stub        super.onCreate(savedInstanceState);    }        @Override    public View onCreateView(LayoutInflater inflater, ViewGroup container,            Bundle savedInstanceState) {                    return inflater.inflate(R.layout.fb, container, false);    }    //    public void next(View view) {//        Intent intent = new Intent(Intent.ACTION_VIEW);//        startActivity(intent);//    }}

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