Android TabHost用法詳解

最近研究了一下Contacts源碼，仿照上面自己寫了一個TabHostTest程式，現整理如下：

main.xml布局檔案：

[html]
<?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檔案：

[html]
<?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"> 
s 
        <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類）：

[java]
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("通話記錄", 
                            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("撥號", 
                        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("通訊錄", 
                        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)); 
    } 
 
    /**
     * Sets the current tab based on the intent's request type
     *
     * @param intent Intent that contains information about which tab should be selected
     */ 
    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類：

[java]
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))); 
 
    } 
} 
如下：

 
 

 

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