Android TabHost组件使用方法详解

最近研究了一下Contacts源码，仿照上面自己写了一个TabHostTest程序，现整理如下：

main.xml布局文件：

<?xml version="1.0" encoding="utf-8"?> 
<TabHost xmlns:Android="Http://schemas.android.com/apk/res/android" 
 android:id="@android:id/tabhost" 
 android:layout_width="match_parent" 
 android:layout_height="match_parent"> 
 <LinearLayout 
  android:orientation="vertical" 
  android:layout_width="match_parent" 
  android:layout_height="match_parent"> 
  <TabWidget android:id="@android:id/tabs" 
   android:layout_width="match_parent" 
   android:layout_height="wrap_content" 
  /> 
  <FrameLayout android:id="@android:id/tabcontent" 
   android:layout_width="match_parent" 
   android:layout_height="0dip" 
   android:layout_weight="1" 
  /> 
 </LinearLayout> 
</TabHost> 

inner.xml文件：

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

  Main.java （主Activity类）：

package com.android.test; 
import android.app.Activity; 
import android.app.TabActivity; 
import android.content.Intent; 
import android.os.Bundle; 
import android.provider.CallLog.Calls; 
import android.provider.Contacts.Intents.UI; 
import android.view.Window; 
import android.widget.TabHost; 
public class Main extends TabActivity implements TabHost.OnTabChangeListener { 
 private static final int TAB_INDEX_DIALER = 0; 
 private static final int TAB_INDEX_CALL_LOG = 1; 
 private static final int TAB_INDEX_CONTACTS = 2; 
 private static final int TAB_INDEX_FAVORITES = 3; 
 private TabHost mTabHost; 
 @Override 
 public void onCreate(Bundle savedInstanceState) { 
  super.onCreate(savedInstanceState); 
  final Intent intent = getIntent(); 
  requestWindowFeature(Window.FEATURE_NO_TITLE); 
  setContentView(R.layout.main); 
  mTabHost = getTabHost(); 
  mTabHost.setOnTabChangedListener(this); 
  // Setup the tabs 
  setupDialerTab(); 
  setupCallLogTab(); 
  setupContactsTab(); 
  setupFavoritesTab(); 
  setCurrentTab(intent); 
 } 
 public void onTabChanged(String tabId) { 
   Activity activity = getLocalActivityManager().getActivity(tabId); 
   if (activity != null) { 
    activity.onWindowFocusChanged(true); 
   } 
 } 
  private void setupCallLogTab() { 
   // Force the class since overriding tab entries doesn't work 
   Intent intent = new Intent("com.android.phone.action.RECENT_CALLS"); 
   intent.setClass(this, Inner.class); 
   mTabHost.addTab(mTabHost.newTabSpec("call_log") 
     .setIndicator("通话记录", 
       getResources().getDrawable(R.drawable.ic_tab_unselected_recent)) 
     .setContent(intent)); 
  } 
 private void setupDialerTab() { 
  Intent intent = new Intent("com.android.phone.action.TOUCH_DIALER"); 
  intent.setClass(this, Inner.class); 
  mTabHost.addTab(mTabHost.newTabSpec("dialer") 
    .setIndicator("拨号", 
      getResources().getDrawable(R.drawable.ic_tab_unselected_dialer)) 
    .setContent(intent)); 
 } 
 private void setupContactsTab() { 
  Intent intent = new Intent(UI.LIST_DEFAULT); 
  intent.setClass(this, Main.class); 
  mTabHost.addTab(mTabHost.newTabSpec("contacts") 
    .setIndicator("通讯录", 
      getResources().getDrawable(R.drawable.ic_tab_unselected_contacts)) 
    .setContent(intent)); 
 } 
 private void setupFavoritesTab() { 
  Intent intent = new Intent(UI.LIST_STREQUENT_ACTION); 
  intent.setClass(this, Inner.class); 
  mTabHost.addTab(mTabHost.newTabSpec("favorites") 
    .setIndicator("收藏", 
      getResources().getDrawable(R.drawable.ic_tab_unselected_starred)) 
    .setContent(intent)); 
 } 
  
 private void setCurrentTab(Intent intent) { 
  // Dismiss menu provided by any children activities 
  Activity activity = getLocalActivityManager(). 
    getActivity(mTabHost.getCurrentTabTag()); 
  if (activity != null) { 
   activity.closeOptionsMenu(); 
  } 
  // Tell the children activities that they should ignore any possible saved 
  // state and instead reload their state from the parent's intent 
  intent.putExtra("", true); 
  // Choose the tab based on the inbound intent 
  String componentName = intent.getComponent().getClassName(); 
  if (getClass().getName().equals(componentName)) { 
   if (false) { 
    //in a call, show the dialer tab(which allows Going back to the call) 
    mTabHost.setCurrentTab(TAB_INDEX_DIALER); 
   } else if ((intent.getFlags() & Intent.FLAG_ACTIVITY_LAUNCHED_FROM_HISTORY) != 0) { 
    // launched from history (long-press home) --> nothing to change 
   } else if (true) { 
    // The dialer was explicitly requested 
    mTabHost.setCurrentTab(TAB_INDEX_DIALER); 
   } 
  } 
 } 
} 

Inner.java类：

package com.android.test; 
import android.app.TabActivity; 
import android.content.Intent; 
import android.os.Bundle; 
import android.view.Window; 
import android.widget.TabHost; 
import android.widget.TabWidget; 
import android.widget.TextView; 
public class Inner extends TabActivity implements TabHost.OnTabChangeListener { 
 private static final int TAB_INDEX_ALL = 0; 
 private static final int TAB_INDEX_MISSED = 1; 
 private static final int TAB_INDEX_OUTGOING = 2; 
 private static final int TAB_INDEX_RECEIVED = 3; 
 private TabHost mTabHost; 
 private TabWidget mTabWidget; 
 @Override 
 public void onCreate(Bundle savedInstanceState) { 
  super.onCreate(savedInstanceState); 
  requestWindowFeature(Window.FEATURE_NO_TITLE); 
  setContentView(R.layout.inner); 
  mTabHost = getTabHost(); 
  mTabHost.setOnTabChangedListener(this); 
  setupTabs(); 
  mTabWidget = mTabHost.getTabWidget(); 
  mTabWidget.setStripEnabled(false); 
  for (int i = 0; i < mTabWidget.getChildCount(); i++) { 
   TextView tv = (TextView) mTabWidget.getChildAt(i).findViewById( 
     android.R.id.title); 
   tv.setTextColor(this.getResources().getColorStateList( 
     android.R.color.white)); 
   tv.setPadding(0, 0, 0,(int) tv.getTextSize()); 
   tv.setText("Tab" + i); 
   mTabWidget.getChildAt(i).getLayoutParams().height =(int ) (3* tv.getTextSize()); 
   mTabWidget.getChildAt(i).setBackgroundResource(R.drawable.tab_bg); 
  } 
 } 
 public void onTabChanged(String tabId) { 
 } 
 private void setupTabs() { 
  mTabHost.addTab(mTabHost.newTabSpec("all").setIndicator( 
    getString(R.string.inner)).setContent( 
    new Intent(this, Other.class))); 
  mTabHost.addTab(mTabHost.newTabSpec("Missed").setIndicator( 
    getString(R.string.inner)).setContent( 
    new Intent(this, Other.class))); 
  mTabHost.addTab(mTabHost.newTabSpec("Outgoing").setIndicator( 
    getString(R.string.inner)).setContent( 
    new Intent(this, Other.class))); 
  mTabHost.addTab(mTabHost.newTabSpec("Received").setIndicator( 
    getString(R.string.inner)).setContent( 
    new Intent(this, Other.class))); 
 } 
} 

效果图如下：

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