43 Android fragment 回退栈

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layout文件夹下代码

f1.xml(被加载到fragment上)

<?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" >    <TextView        android:id="@+id/textView1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="文件管理"        android:layout_marginTop="100dp"        android:layout_marginLeft="20dp"        android:textSize="25sp" /></LinearLayout>

f2.xml(被加载到fragment上)

<?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" >    <TextView        android:id="@+id/textView1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="用户管理"        android:layout_marginTop="100dp"        android:layout_marginLeft="20dp"        android:textSize="25sp" /></LinearLayout>

f3.xml(被加载到fragment上)

<?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" >    <TextView        android:id="@+id/textView1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="产品管理"        android:layout_marginTop="100dp"        android:layout_marginLeft="20dp"        android:textSize="25sp" /></LinearLayout>

f4.xml(被加载到fragment上)

<?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" >    <TextView        android:id="@+id/textView1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="资源管理"        android:layout_marginTop="100dp"        android:layout_marginLeft="20dp"        android:textSize="25sp" /></LinearLayout>

Fragment1 extends fragment 其余三个和他相同

Fragment1.java 代码

package com.example.android_fragment_backstack;import android.app.Fragment;import android.os.Bundle;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;public class Fragment1 extends Fragment {@Overridepublic void onCreate(Bundle savedInstanceState) {// TODO Auto-generated method stubsuper.onCreate(savedInstanceState);}@Overridepublic View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {// TODO Auto-generated method stubView view=inflater.inflate(R.layout.f1, null);return view;}@Overridepublic void onPause() {// TODO Auto-generated method stubsuper.onPause();}}

activity_main.xml 代码文件（主要是两个布局）

 <LinearLayout 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:orientation="horizontal"    tools:context=".MainActivity" >     <LinearLayout         android:id="@+id/left"         android:layout_weight="1"         android:layout_width="0dp"         android:layout_height="match_parent"         android:orientation="vertical"         android:background="#cccccc"          >         <Button             android:id="@+id/button1"             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:text="文件管理" />         <Button             android:id="@+id/button2"             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:text="用户管理" />         <Button             android:id="@+id/button3"             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:text="产品管理" />         <Button             android:id="@+id/button4"             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:text="资源管理" />     </LinearLayout>     <LinearLayout          android:layout_weight="3"         android:id="@+id/center"          android:background="#0fffff"         android:layout_width="0dp"         android:layout_height="match_parent"         android:orientation="vertical" >     </LinearLayout></LinearLayout>

MainActivity.java代码

package com.example.android_fragment_backstack;import android.os.Bundle;import android.app.Activity;import android.app.FragmentManager;import android.app.FragmentTransaction;import android.view.Menu;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;public class MainActivity extends Activity implements OnClickListener {private FragmentManager manager;private FragmentTransaction transaction;private Button button1,button2,button3,button4;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);button1=(Button)findViewById(R.id.button1);button2=(Button)findViewById(R.id.button2);button3=(Button)findViewById(R.id.button3);button4=(Button)findViewById(R.id.button4);button1.setOnClickListener(this);button2.setOnClickListener(this);button3.setOnClickListener(this);button4.setOnClickListener(this);manager = this.getFragmentManager();}@Overridepublic 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;}@Overridepublic void onClick(View v) {// TODO Auto-generated method stubtransaction = manager.beginTransaction();switch (v.getId()) {case R.id.button1:Fragment1 f1=new Fragment1();transaction.replace(R.id.center, f1,"fragment1");transaction.addToBackStack("fragment1");//添加到Activity管理的回退栈中break;case R.id.button2:Fragment2 f2=new Fragment2();transaction.replace(R.id.center, f2,"fragment2");transaction.addToBackStack("fragment2");//添加到Activity管理的回退栈中break;case R.id.button3:Fragment3 f3=new Fragment3();transaction.replace(R.id.center, f3,"fragment3");transaction.addToBackStack("fragment3");//添加到Activity管理的回退栈中break;case R.id.button4:Fragment4 f4=new Fragment4();transaction.replace(R.id.center, f4,"fragment4");transaction.addToBackStack("fragment4");//添加到Activity管理的回退栈中break;default:break;}transaction.commit();}}

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