android tabhost tab内多个activity的跳转(包括返回)

最近看一网友博客关于tabhost tab内多个activity的跳转问题，觉得很适用，所以在此分享了...

1：先看效果图：

2：先看tabhost的布局吧：main.xml

<?xml version="1.0" encoding="utf-8"?><tabhost xmlns:android="http://schemas.android.com/apk/res/android" xmlns:myapp="http://schemas.android.com/apk/res/com.javaeye.dengyin2000.android.riddles" android:id="@android:id/tabhost" android:layout_width="fill_parent" android:layout_height="fill_parent"> <linearlayout android:id="@+id/oouter" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical"> <!-- 其中如果不添加 android:layout_weight="1" 则选项卡将位于顶部--> <framelayout android:id="@android:id/tabcontent" android:layout_width="fill_parent" android:layout_height="0dip" android:layout_weight="1"> <tabwidget android:id="@android:id/tabs" android:layout_width="fill_parent" android:layout_height="wrap_content"> </tabwidget> </framelayout></linearlayout></tabhost>

3:其中有一个很重要的用于管理activity的类，AbstractActivityGroup，此类需要extends ActivityGroup,利用ActivityGroup来管理activity,在每次跳转时将此view添加到一个list中，当返回时就remove掉一个view，此类的原创是IntelliJ IDEA在此就贴下这位大神的代码咯： package com.youpeng.stackactivity;import android.app.ActivityGroup;import android.os.Build;import android.view.KeyEvent;import android.view.View;import java.util.List;/** * Created by IntelliJ IDEA. * User: EDENYIN * Date: 12/1/10 * Time: 3:10 PM * To change this template use File | Settings | File Templates. */public abstract class AbstractActivityGroup extends ActivityGroup { public List<view> viewHistory; public void replaceContentView(View view) { viewHistory.add(view); setContentView(view); } public void back() { if (!viewHistory.isEmpty()) { viewHistory.remove(viewHistory.get(viewHistory.size() - 1)); if (viewHistory.isEmpty()) { finish(); return; } setContentView(viewHistory.get(viewHistory.size() - 1)); } else { finish(); } } @Override public void onBackPressed() { back(); } @Override public boolean onKeyDown(int keyCode, KeyEvent event) { if (android.os.Build.VERSION.SDK_INT <= Build.VERSION_CODES.DONUT && keyCode == KeyEvent.KEYCODE_BACK && event.getRepeatCount() == 0) { // Take care of calling this method on earlier versions of // the platform where it doesn't exist. onBackPressed(); return true; } return super.onKeyDown(keyCode, event); }}</view>4：再来看下主activity stackActivity的代码：extend TabActivity代码如下：package com.youpeng.stackactivity;import android.app.TabActivity;import android.content.Intent;import android.os.Bundle;import android.widget.TabHost;public class StackActivity extends TabActivity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);final TabHost tabHost = getTabHost();tabHost.addTab(tabHost.newTabSpec("browse").setIndicator("Browse",getResources().getDrawable(R.drawable.ic_launcher)).setContent(new Intent(this, BrowseGroup.class)));tabHost.addTab(tabHost.newTabSpec("favorite").setIndicator("Favorite",getResources().getDrawable(R.drawable.ic_launcher)).setContent(new Intent(this, FavGroup.class)));tabHost.setCurrentTab(0);}} 5：再来看下最关键的两个类分别是BrowseGroup.class和FavGroup.class，直接上代码：package com.youpeng.stackactivity;import android.content.Intent;import android.os.Bundle;import android.view.View;import java.util.ArrayList;/** * Created by IntelliJ IDEA. * User: denny * Date: 10-12-9 * Time: PM11:00 * To change this template use File | Settings | File Templates. */public class BrowseGroup extends AbstractActivityGroup{ public static BrowseGroup BROWSE_GROUP; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); viewHistory = new ArrayList<view>(); BROWSE_GROUP = this; View decorView = getLocalActivityManager().startActivity("first", new Intent(this, First.class)).getDecorView(); replaceContentView(decorView); }} </view>package com.youpeng.stackactivity;import android.content.Intent;import android.os.Bundle;import android.view.View;import java.util.ArrayList;/** * Created by IntelliJ IDEA. * User: denny * Date: 10-12-11 * Time: PM9:28 */public class FavGroup extends AbstractActivityGroup{ public static FavGroup FAV_GROUP; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); FAV_GROUP = this; viewHistory = new ArrayList<view>(); View favListView = getLocalActivityManager().startActivity("FavoriteJokes", new Intent(this, FavoriteJokes.class).addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP)).getDecorView(); viewHistory.add(favListView); setContentView(favListView); }} </view>我们在每个tab页中有申请一个ArrayList，让每一个tab页所有的activity都添加到这个LIst中来，当需要返回时再从list中remove。6：再来看first 这个activity的跳转，代码如下： package com.youpeng.stackactivity;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;public class First extends Activity implements OnClickListener {private Button back, next;@Overrideprotected void onCreate(Bundle savedInstanceState) {// TODO Auto-generated method stubsuper.onCreate(savedInstanceState);setContentView(R.layout.first);back = (Button) findViewById(R.id.first_back);back.setOnClickListener(this);next = (Button) findViewById(R.id.first_next);next.setOnClickListener(this);}@Overridepublic void onClick(View v) {switch (v.getId()) {case R.id.first_back:BrowseGroup.BROWSE_GROUP.back();break;case R.id.first_next:Intent intent = new Intent(); intent.setClass(First.this, SecondActivity.class); View decorView = BrowseGroup.BROWSE_GROUP.getLocalActivityManager().startActivity("Category joke list", intent).getDecorView(); BrowseGroup.BROWSE_GROUP.replaceContentView(decorView);break;default:break;}}}以及second activity的代码如下：package com.youpeng.stackactivity;import android.app.Activity;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;public class SecondActivity extends Activity implements OnClickListener{private Button back, next;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.second);back = (Button) findViewById(R.id.second_back);back.setOnClickListener(this);next = (Button) findViewById(R.id.second_next);next.setOnClickListener(this);}@Overridepublic void onClick(View v) {// TODO Auto-generated method stubswitch (v.getId()) {case R.id.second_back:BrowseGroup.BROWSE_GROUP.back();break;case R.id.second_next:break;default:break;}}} 当返回时直接调用父类的back方法。

7：总结：每一个tab页都有一个List来存储activity，当每次跳转及返回进都要对该list进行操作，本质上是通过ActivityGroup来对activity进行管理。

8：工程代码地址如下：

http://download.csdn.net/detail/lzg08_08/5050003