ActivityGroup在一年前已经被说明不用了，但是腾讯QQ，新浪微博上也不乏ActivityGroup的身影。所以，即使是过时的东西，也有学习的必要，当然项目中也是可以添加的。在网上找了一个博客，不过还是想自己理解一下其中的因原。http://www.cnblogs.com/answer1991/archive/2012/05/08/2489844.html
mainactivity.xml
<?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:layout_marginTop="0.0px" > <LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" > <LinearLayout
android:id="@+id/container"
android:layout_width="fill_parent"
android:layout_height="0.0dip"
android:orientation="horizontal"
android:layout_weight="1.0" /> <RadioGroup
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
android:gravity="center_vertical"
android:orientation="horizontal" > <Button
android:id="@+id/radio_button0"
android:layout_marginTop="2.0dip"
android:drawableTop="@android:drawable/ic_menu_call"
android:text="按钮1" /> <Button
android:id="@+id/radio_button1"
android:layout_marginTop="2.0dip"
android:drawableTop="@android:drawable/ic_menu_camera"
android:text="按钮2" /> <Button
android:id="@+id/radio_button2"
android:layout_marginTop="2.0dip"
android:drawableTop="@android:drawable/ic_menu_agenda"
android:text="按钮3" /> <Button
android:id="@+id/radio_button3"
android:layout_marginTop="2.0dip"
android:drawableTop="@android:drawable/ic_menu_delete"
android:text="按钮4" /> <Button
android:id="@+id/radio_button4"
android:layout_marginTop="2.0dip"
android:drawableTop="@android:drawable/ic_menu_help"
android:text="按钮5" />
</RadioGroup>
</LinearLayout> </LinearLayout>
其实这个layout的结构挺简单的：
功能代码：
1.定义一个生成Activity的工厂
protected void setContainerView(String activityName,
Class<?> activityClassTye) {
localActivityManager = getLocalActivityManager();
viewgroup = getContainer();
viewgroup.removeAllViews();
Activity containerActivity = localActivityManager
.getActivity(activityName);
if (containerActivity == null) {
localActivityManager.startActivity(activityName, new Intent(this,
activityClassTye).addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP));
}
viewgroup.addView(localActivityManager.getActivity(activityName)
.getWindow().getDecorView(), new LayoutParams(
LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
}
2.找到自定义id加在Activity的View
protected ViewGroup getContainer() {
return (ViewGroup) findViewById(R.id.container);
}
3.添加进入子Activity的intent事件
setContainerView(activity_id0, Activity0.class);//设置默认的activity显示
4.添加按钮事件就可以在主Activity中随意切换到子Activity中了。
效果图：