根据网上资料，写了一个通用的类似模板的类MyTabActivity，实现一个图标Icon+文字Label的TabActivity，应用的类只要把Icon和Label加上去，对应每个Activity，就可以建立一个TabActivity了。
1.模板类MyTabActivity.java(可以重用)
[java]
package amao.callbye;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import android.app.Activity;
import android.app.TabActivity;
import android.content.Context;
import android.content.Intent;
import android.graphics.Color;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.util.Log;
import android.view.Gravity;
import android.view.Window;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TabHost;
import android.widget.TabHost.OnTabChangeListener;
import android.widget.TabHost.TabSpec;
import android.widget.TextView;
/**
* Abstract TabActivity with icon+text TabSpec support for each Activity
* Sub class need set "layout" and "selectDrawable"(tab selected background image) in constructor
* And implement getMyTabList() to add tab configuration
*
* @author Anderson Mao, 2012-05-01
*/
public abstract class MyTabActivity extends TabActivity {
private static String TAG_NAME = MyTabActivity.class.getSimpleName();
private TabHost tabHost;
private int tabLayout;
private int selectDrawable;
private Drawable selectBackground;
private int textColor = Color.GRAY;
private int selectTextColor = Color.LTGRAY;
private Map<String, TabView> tabViewMap = new HashMap<String, TabView>();
private String tabViewTagPrev=null;
public abstract List<MyTab> getMyTabList();
public MyTabActivity(int tabLayout, int selectDrawable){
this.tabLayout = tabLayout;
this.selectDrawable = selectDrawable;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(tabLayout);
tabHost = getTabHost(); // Get TabHost after setContentView()
//
initTabHost();
}
private void initTabHost(){
selectBackground = this.getResources().getDrawable(selectDrawable);
int index = 0;
// Create TabSpec for each MyTab. The first tab is the default
StringdefaultTag = null;
TabView defaultTabView = null;
List<MyTab> myTabList = getMyTabList();
for(MyTab myTab: myTabList){
index++;
String tag = Integer.toString(index);
TabView view = new TabView(this, myTab.icon, myTab.text);
TabSpec tabSpec = tabHost.newTabSpec(tag)
.setIndicator(view)
.setContent(new Intent(this, myTab.activity))
;
tabViewMap.put(tag, view);
tabHost.addTab(tabSpec);
if(defaultTag == null){
defaultTag = tag;
defaultTabView = view;
}
}
// Listener on tab change
tabHost.setOnTabChangedListener( new OnTabChangeListener(){
@Override
public void onTabChanged(String tabId){
Log.d(TAG_NAME,"change tab: id="+tabId+", prevId="+tabViewTagPrev);
if(tabViewTagPrev!=null){
// Reset prev tab
TabView tvPrev = tabViewMap.get(tabViewTagPrev);
if(tvPrev!=null){
tvPrev.setBackgroundDrawable(null);
tvPrev.textView.setTextColor(textColor);
}
}
// Set current selected tab
TabView tv = tabViewMap.get(tabId);
if(tv!=null){
tv.setBackgroundDrawable(selectBackground);
tv.textView.setTextColor(selectTextColor);
}
//
tabViewTagPrev = tabId;
}
});
// Set default tab
if(defaultTag != null){
defaultTabView.setBackgroundDrawable(selectBackground);
defaultTabView.textView.setTextColor(selectTextColor);
tabViewTagPrev = defaultTag;
}
}
/**
* Layout for each TabSpec
*/
private class TabView extends LinearLayout {
private ImageView imageView ;
private TextView textView;
public TabView(Context c, int icon, String text) {
super(c);
setOrientation(VERTICAL);
setGravity(Gravity.CENTER);
imageView = new ImageView(c);
imageView.setImageDrawable(this.getResources().getDrawable(icon));
imageView.setBackgroundColor(Color.TRANSPARENT);
addView(imageView);
textView = new TextView(c);
textView.setText(text);
textView.setTextColor(textColor);
textView.setGravity(Gravity.CENTER);
addView(textView);
}
}
/**
* Options for each TabSpec. Icon + Text + Activity
*/
public class MyTab{
private int icon;
private String text;
private Class<? extends Activity> activity;
public MyTab(int icon, String text, Class<? extends Activity> activity){
this.icon = icon;
this.text = text;
this.activity = activity;
}
}
}
2.实际应用类CallbyeTabActivity.java（使用MyTabActivity）
[java]
package amao.callbye;
import java.util.ArrayList;
import java.util.List;
/**
* TabActivity by configuration
* @see MyTabActivity.java
*
* @author Anderson Mao, 2012-05-01
*/
public class CallbyeTabActivity extends MyTabActivity {
public CallbyeTabActivity(){
super(R.layout.tab, R.drawable.icon_tab_select);
}
@Override
public List<MyTab> getMyTabList(){
List<MyTab> myTabList = new ArrayList<MyTab>();
//
myTabList.add(new MyTab(R.drawable.icon_home, getString(R.string.tab_home), CallbyeActivity.class) );
myTabList.add(new MyTab(R.drawable.icon_setting, getString(R.string.tab_setting), SettingActivity.class) );
myTabList.add(new MyTab(R.drawable.icon_help, getString(R.string.tab_help), HelpActivity.class) );
myTabList.add(new MyTab(R.drawable.icon_history, getString(R.string.tab_info), InfoActivity.class) );
//
return myTabList;
}
}
3.Layout (tab.xml)
[html]
<?xml version="1.0" encoding="utf-8"?>
<TabHost android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="@android:id/tabhost"
xmlns:android="http://schemas.android.com/apk/res/android"
>
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
android:padding="0dip"
>
<FrameLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="@android:id/tabcontent"
>
</FrameLayout>
<TabWidgetwww.2cto.com
android:layout_width="fill_parent"
android:layout_height="50dip"
android:id="@android:id/tabs"
android:background= "@android:color/black"
android:layout_alignBottom = "@android:id/tabcontent"
/>
</RelativeLayout>
</TabHost>
作者：andersonmao
