安卓初級教程（5）：TabHost的思考

 package com.myhost;

 import android.os.Bundle;
 import android.view.LayoutInflater;
 import android.widget.TabHost;
 import android.app.TabActivity;

 public class TabhostActivity extends TabActivity {    // Extend TabActivity class

     /** Called when the activity is first created. */

     @Override

     public void onCreate(Bundle savedInstanceState) {

         super.onCreate(savedInstanceState);

        TabHost tabHost = this.getTabHost();  // The activity TabHost
         LayoutInflater.from(this).inflate(R.layout.main,tabHost.getTabContentView(), true);

         tabHost.addTab(tabHost.newTabSpec("tab1")
                 .setIndicator("tab1", getResources()
                         .getDrawable(R.drawable.chartareaup_green))
                         .setContent(R.id.linearLayout1));

         tabHost.addTab(tabHost.newTabSpec("tab2")
                 .setIndicator("tab2", getResources()
                         .getDrawable(R.drawable.home_yellow))
                         .setContent(R.id.linearLayout2));     

         tabHost.addTab(tabHost.newTabSpec("tab3")
                 .setIndicator("tab3", getResources()
                         .getDrawable(R.drawable.harddrivedownload_red))
                         .setContent(R.id.linearLayout3));    

         tabHost.addTab(tabHost.newTabSpec("tab4")
                 .setIndicator("tab4", getResources()
                         .getDrawable(R.drawable.shoppingcart_blue))
                         .setContent(R.id.linearLayout4));
     }
 }

 package net.weibo.ui;

 import android.app.TabActivity;
 import android.content.Intent;
 import android.os.Bundle;
 import android.util.Log;
 import android.widget.RadioGroup;
 import android.widget.RadioGroup.OnCheckedChangeListener;
 import android.widget.TabHost;
 import android.widget.TabHost.TabSpec;

 public class MainActivity extends TabActivity {
     /** Called when the activity is first created. */
     public TabHost mth;
     public static final String TAB_HOME="HOME";
     public static final String TAB_MSG="INFORMATION";
     public static final String TAB_ABT="ABOUT";
     public static final String TAB_SEH="SEARCH";
     public static final String TAB_MORE="MORE";

     public RadioGroup radioGroup;

     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.main);

         mth=this.getTabHost(); //mth 等於上一段第18行的寫法。

         TabSpec ts1=mth.newTabSpec(TAB_HOME).setIndicator(TAB_HOME);
         ts1.setContent(new Intent(MainActivity.this,FirstActivity.class));
         mth.addTab(ts1);

         TabSpec ts2=mth.newTabSpec(TAB_MSG).setIndicator(TAB_MSG);
         ts2.setContent(new Intent(MainActivity.this,SecondActivity.class));
         mth.addTab(ts2);

         TabSpec ts3=mth.newTabSpec(TAB_ABT).setIndicator(TAB_ABT);
         ts3.setContent(new Intent(MainActivity.this,ThirdActivity.class));
         mth.addTab(ts3);

         TabSpec ts4=mth.newTabSpec(TAB_SEH).setIndicator(TAB_SEH);
         ts4.setContent(new Intent(MainActivity.this,ForthActivity.class));
         mth.addTab(ts4);

         TabSpec ts5=mth.newTabSpec(TAB_MORE).setIndicator(TAB_MORE);
         ts5.setContent(new Intent(MainActivity.this,FifthActivity.class));
         mth.addTab(ts5);

         this.radioGroup=(RadioGroup)findViewById(R.id.main_radio);
         radioGroup.setOnCheckedChangeListener(new OnCheckedChangeListener() {

                 @Override
                 public void onCheckedChanged(RadioGroup group, int checkedId) {
                     // TODO Auto-generated method stub

                     switch(checkedId){
                         case R.id.radio_button0:

                             mth.setCurrentTabByTag(TAB_HOME);
                             break;
                         case R.id.radio_button1:

                             mth.setCurrentTabByTag(TAB_MSG);
                             break;
                         case R.id.radio_button2:
                             mth.setCurrentTabByTag(TAB_ABT);
                             break;
                         case R.id.radio_button3:

                             mth.setCurrentTabByTag(TAB_SEH);
                             break;
                         case R.id.radio_button4:

                             mth.setCurrentTabByTag(TAB_MORE);
                             break;
                     }
                 }
             });

     }
 }

以上兩種寫法熟優熟劣？