關於Android TabHost切換Tab字體的顏色背景顏色改變

[java] 
最近在做一個平板電腦點餐的系統，要用到TabHost，不太好寫，寫好了分享給大家，先上圖片，默認效果： 

最近在做一個平板電腦點餐的系統，要用到TabHost，不太好寫，寫好了分享給大家，先上圖片，默認效果：

切換後效果

先是layout文件夾中的布局文件，代碼如下：

<TabHost xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@android:id/tabhost"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >

    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:orientation="vertical"
        android:background="@drawable/category_bg"
        android:padding="0dp" >

        <TabWidget
            android:id="@android:id/tabs"
            android:layout_width="wrap_content"
            android:layout_height="40dp"/>

        <FrameLayout
            android:id="@android:id/tabcontent"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:background="@drawable/context_bg"
            android:padding="0dp" />
    </LinearLayout>

</TabHost>

然後是java文件，

[java] 
package com.dzdc.activity; 
 
 
import android.app.TabActivity; 
import android.content.Intent; 
import android.graphics.Typeface; 
import android.os.Bundle; 
import android.view.KeyEvent; 
import android.view.View; 
import android.view.Window; 
import android.view.WindowManager; 
import android.widget.TabHost; 
import android.widget.TabHost.OnTabChangeListener; 
import android.widget.TextView; 
 
 
import com.dzdc.R; 
 
 
@SuppressWarnings("deprecation") 
public class IndexActivity extends TabActivity { 
    private String[] tabMenu = { "熱菜", "冷菜", "海鮮", "川菜", "酒飲", "招牌菜" }; 
    private Intent intent0, intent1, intent2, intent3, intent4, intent5; 
    private Intent[] intents = { intent0, intent1, intent2, intent3, intent4, 
            intent5 }; 
    private TabHost.TabSpec tabSpec0, tabSpec1, tabSpec2, tabSpec3, tabSpec4, 
            tabSpec5; 
    private TabHost.TabSpec[] tabSpecs = { tabSpec0, tabSpec1, tabSpec2, 
            tabSpec3, tabSpec4, tabSpec5 }; 
 
 
    private TabHost tabHost = null; 
 
 
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
        super.onCreate(savedInstanceState); 
        requestWindowFeature(Window.FEATURE_NO_TITLE);// 去掉標題欄  
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, 
                WindowManager.LayoutParams.FLAG_FULLSCREEN); 
        setContentView(R.layout.index); 
 
 
        tabHost = getTabHost(); 
 
 
        for (int i = 0; i < tabMenu.length; i++) { 
            intents[i] = new Intent(); 
            intents[i].setClass(this, IndexContentActivity.class); 
 
 
            tabSpecs[i] = tabHost.newTabSpec(tabMenu[i]); 
            tabSpecs[i].setIndicator(tabMenu[i]);// 設置文字  
            tabSpecs[i].setContent(intents[i]);// 設置該頁的內容  
 
 
            tabHost.addTab(tabSpecs[i]);// 將該頁的內容添加到Tabhost  
        } 
 
 
        tabHost.setCurrentTabByTag(tabMenu[0]); // 設置第一次打開時默認顯示的標簽，  
         
        updateTab(tabHost);//初始化Tab的顏色，和字體的顏色  
         
        tabHost.setOnTabChangedListener(new OnTabChangedListener()); // 選擇監聽器  
 
 
    } 
 
 
    class OnTabChangedListener implements OnTabChangeListener { 
 
 
        @Override 
        public void onTabChanged(String tabId) { 
            tabHost.setCurrentTabByTag(tabId); 
            System.out.println("tabid " + tabId); 
            System.out.println("curreny after: " + tabHost.getCurrentTabTag()); 
            updateTab(tabHost); 
        } 
    } 
 
 
    @Override 
    public boolean onKeyDown(int keyCode, KeyEvent event) { 
        if (keyCode == KeyEvent.KEYCODE_BACK && event.getRepeatCount() == 0) { 
            System.exit(0); 
            return false; 
        } else if (keyCode == KeyEvent.KEYCODE_MENU 
                && event.getRepeatCount() == 0) { 
            return true; // 返回true就不會彈出默認的setting菜單  
        } 
 
 
        return false; 
    } 
     
    /**
     * 更新Tab標簽的顏色，和字體的顏色
     * @param tabHost
     */ 
    private void updateTab(final TabHost tabHost) { 
        for (int i = 0; i < tabHost.getTabWidget().getChildCount(); i++) { 
            View view = tabHost.getTabWidget().getChildAt(i); 
            TextView tv = (TextView) tabHost.getTabWidget().getChildAt(i).findViewById(android.R.id.title); 
            tv.setTextSize(16); 
            tv.setTypeface(Typeface.SERIF, 2); // 設置字體和風格  
            if (tabHost.getCurrentTab() == i) {//選中  
                view.setBackgroundDrawable(getResources().getDrawable(R.drawable.category_current));//選中後的背景  
                tv.setTextColor(this.getResources().getColorStateList( 
                        android.R.color.black)); 
            } else {//不選中  
                view.setBackgroundDrawable(getResources().getDrawable(R.drawable.category_bg));//非選擇的背景  
                tv.setTextColor(this.getResources().getColorStateList( 
                        android.R.color.white)); 
            } 
        } 
    } 
} 

package com.dzdc.activity;

import android.app.TabActivity;
import android.content.Intent;
import android.graphics.Typeface;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.widget.TabHost;
import android.widget.TabHost.OnTabChangeListener;
import android.widget.TextView;

import com.dzdc.R;

@SuppressWarnings("deprecation")
public class IndexActivity extends TabActivity {
 private String[] tabMenu = { "熱菜", "冷菜", "海鮮", "川菜", "酒飲", "招牌菜" };
 private Intent intent0, intent1, intent2, intent3, intent4, intent5;
 private Intent[] intents = { intent0, intent1, intent2, intent3, intent4,
   intent5 };
 private TabHost.TabSpec tabSpec0, tabSpec1, tabSpec2, tabSpec3, tabSpec4,
   tabSpec5;
 private TabHost.TabSpec[] tabSpecs = { tabSpec0, tabSpec1, tabSpec2,
   tabSpec3, tabSpec4, tabSpec5 };

 private TabHost tabHost = null;

 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  requestWindowFeature(Window.FEATURE_NO_TITLE);// 去掉標題欄
  getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
    WindowManager.LayoutParams.FLAG_FULLSCREEN);
  setContentView(R.layout.index);

  tabHost = getTabHost();

  for (int i = 0; i < tabMenu.length; i++) {
   intents[i] = new Intent();
   intents[i].setClass(this, IndexContentActivity.class);

   tabSpecs[i] = tabHost.newTabSpec(tabMenu[i]);
   tabSpecs[i].setIndicator(tabMenu[i]);// 設置文字
   tabSpecs[i].setContent(intents[i]);// 設置該頁的內容

   tabHost.addTab(tabSpecs[i]);// 將該頁的內容添加到Tabhost
  }

  tabHost.setCurrentTabByTag(tabMenu[0]); // 設置第一次打開時默認顯示的標簽，
  
  updateTab(tabHost);//初始化Tab的顏色，和字體的顏色
  
  tabHost.setOnTabChangedListener(new OnTabChangedListener()); // 選擇監聽器

 }

 class OnTabChangedListener implements OnTabChangeListener {

  @Override
  public void onTabChanged(String tabId) {
   tabHost.setCurrentTabByTag(tabId);
   System.out.println("tabid " + tabId);
   System.out.println("curreny after: " + tabHost.getCurrentTabTag());
   updateTab(tabHost);
  }
 }

 @Override
 public boolean onKeyDown(int keyCode, KeyEvent event) {
  if (keyCode == KeyEvent.KEYCODE_BACK && event.getRepeatCount() == 0) {
   System.exit(0);
   return false;
  } else if (keyCode == KeyEvent.KEYCODE_MENU
    && event.getRepeatCount() == 0) {
   return true; // 返回true就不會彈出默認的setting菜單
  }

  return false;
 }
 
 /**
     * 更新Tab標簽的顏色，和字體的顏色
     * @param tabHost
     */
    private void updateTab(final TabHost tabHost) {
        for (int i = 0; i < tabHost.getTabWidget().getChildCount(); i++) {
            View view = tabHost.getTabWidget().getChildAt(i);
            TextView tv = (TextView) tabHost.getTabWidget().getChildAt(i).findViewById(android.R.id.title);
    tv.setTextSize(16);
    tv.setTypeface(Typeface.SERIF, 2); // 設置字體和風格
            if (tabHost.getCurrentTab() == i) {//選中
                view.setBackgroundDrawable(getResources().getDrawable(R.drawable.category_current));//選中後的背景
                tv.setTextColor(this.getResources().getColorStateList(
          android.R.color.black));
            } else {//不選中
                view.setBackgroundDrawable(getResources().getDrawable(R.drawable.category_bg));//非選擇的背景
                tv.setTextColor(this.getResources().getColorStateList(
          android.R.color.white));
            }
        }
    }
}