TabHost两种实现方式

第一种：继承TabActivity，从TabActivity中用getTabHost()方法获取TabHost。只要定义具体Tab内容布局就行了.

xml布局：

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent" android:layout_height="fill_parent">
<LinearLayout android:id="@+id/widget_layout_Blue"
android:layout_width="fill_parent" android:layout_height="fill_parent"
android:orientation="vertical" >
<EditText android:id="@+id/widget34" android:layout_width="fill_parent"
android:layout_height="wrap_content" android:text="EditText"
android:textSize="18sp">
</EditText>
<Button android:id="@+id/widget30" android:layout_width="wrap_content"
android:layout_height="wrap_content" android:text="Button">
</Button>
</LinearLayout>
<LinearLayout android:id="@+id/widget_layout_red"
android:layout_width="fill_parent" android:layout_height="fill_parent"
android:orientation="vertical"  >
<AnalogClock android:id="@+id/widget36"
android:layout_width="wrap_content" android:layout_height="wrap_content">
</AnalogClock>
</LinearLayout>
<LinearLayout android:id="@+id/widget_layout_green"
android:layout_width="fill_parent" android:layout_height="fill_parent"
android:orientation="vertical">
<RadioGroup android:id="@+id/widget43"
android:layout_width="166px" android:layout_height="98px"
android:orientation="vertical">
<RadioButton android:id="@+id/widget44"
android:layout_width="wrap_content" android:layout_height="wrap_content"
android:text="RadioButton">
</RadioButton>
<RadioButton android:id="@+id/widget45"
android:layout_width="wrap_content" android:layout_height="wrap_content"
android:text="RadioButton">
</RadioButton>
</RadioGroup>
</LinearLayout>
</FrameLayout>

java代码：
super.onCreate(savedInstanceState);
myTabhost=this.getTabHost();
//get Tabhost
LayoutInflater.from(this).inflate(R.layout.main, myTabhost.getTabContentView(), true);
myTabhost.setBackgroundColor(Color.argb(150, 22, 70, 150));

myTabhost
.addTab(myTabhost.newTabSpec("One")// make a new Tab
.setIndicator("A")
// set the Title and Icon
.setContent(R.id.widget_layout_Blue));
// set the layout

myTabhost
.addTab(myTabhost.newTabSpec("Two")// make a new Tab
.setIndicator("B",
getResources().getDrawable(R.drawable.mumule))
// set the Title and Icon
.setContent(R.id.widget_layout_green));
// set the layout

myTabhost
.addTab(myTabhost.newTabSpec("Three")// make a new Tab
.setIndicator("C",
getResources().getDrawable(R.drawable.notepad))
// set the Title and Icon
.setContent(R.id.widget_layout_red));

　　第二种：不用继承TabActivity，在布局文件中定义TabHost即可，但是TabWidget的id必须是
@android:id/tabs，FrameLayout的id必须是@android:id/tabcontent。TabHost的id可以自定义.

xml布局：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/hometabs"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TabHost android:id="@+id/tabhost"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<LinearLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">

<TabWidget android:id="@android:id/tabs"
android:orientation="horizontal"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
</TabWidget>

<FrameLayout android:id="@android:id/tabcontent"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<TextView android:id="@+id/view1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"/>
<TextView android:id="@+id/view2"
android:layout_width="fill_parent"
android:layout_height="fill_parent"/>
<TextView android:id="@+id/view3"
android:layout_width="fill_parent"
android:layout_height="fill_parent"/>
</FrameLayout>

</LinearLayout>
</TabHost>
</LinearLayout>

java代码：
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.hometabs);

TabHost tabHost = (TabHost) findViewById(R.id.tabhost);
tabHost.setup();
TabWidget tabWidget = tabHost.getTabWidget();

tabHost.addTab(tabHost.newTabSpec("tab1")
.setIndicator("tab1", getResources().getDrawable(R.drawable.mumule))
.setContent(R.id.view1));

tabHost.addTab(tabHost.newTabSpec("tab3")
.setIndicator("tab3")
.setContent(R.id.view3));

tabHost.addTab(tabHost.newTabSpec("tab2")
.setIndicator("tab2")
.setContent(R.id.view2));

final int tabs = tabWidget.getChildCount();
Log.i(TAG, "***tabWidget.getChildCount() : " + tabs);

final int tabWidth = 90;
final int tabHeight = 45;

for (int i = 0; i < tabs; i++) {
/*	final View view = tabWidget.getChildAt(i);
view.getLayoutParams().width = tabWidth;
view.getLayoutParams().height = tabHeight;
final TextView tv = (TextView) view.findViewById(android.R.id.title);
tv.setTextColor(this.getResources().getColorStateList(android.R.color.black));
MarginLayoutParams tvMLP = (MarginLayoutParams)tv.getLayoutParams();
tvMLP.bottomMargin = 8;*/
}
}