关于安卓开发实现底部菜单栏（已过时做法，不建议使用）

将TabHost的标签放在底部

 

直接上代码

主代码：

 1 package sdut;
 2 
 3 import com.example.sdutfriends.R;
 4 
 5 import android.app.AlertDialog;
 6 import android.app.TabActivity;
 7 import android.content.DialogInterface;
 8 import android.content.Intent;
 9 import android.os.Bundle;
10 import android.view.KeyEvent;
11 import android.view.Window;
12 import android.widget.RadioGroup;
13 import android.widget.RadioGroup.OnCheckedChangeListener;
14 import android.widget.TabHost;
15 import android.widget.TabHost.TabSpec;
16 
17 public class SdutMainActivity extends TabActivity{
18     private TabHost mth;
19     private RadioGroup radioGroup;
20     @Override
21     protected void onCreate(Bundle savedInstanceState) {
22         // TODO Auto-generated method stub
23         super.onCreate(savedInstanceState);
24         //去除标题
25         requestWindowFeature(Window.FEATURE_NO_TITLE);
26         setContentView(R.layout.sdut_activity);
27         
28         //初始化底部菜单栏
29         mth = this.getTabHost();
30         
31         TabSpec str1 = mth.newTabSpec("function_1").setIndicator("功能1");
32         str1.setContent(new Intent(SdutMainActivity.this,SdutFindOldman.class));
33         mth.addTab(str1); 
34         
35         TabSpec str2 = mth.newTabSpec("function_2").setIndicator("功能2");
36         str2.setContent(new Intent(SdutMainActivity.this,SdutFindActivity.class));
37         mth.addTab(str2);
38         
39         TabSpec str3 = mth.newTabSpec("function_3").setIndicator("功能3");
40         str3.setContent(new Intent(SdutMainActivity.this,SdutFindOldman.class));
41         mth.addTab(str3);
42         
43         TabSpec str4 = mth.newTabSpec("function_4").setIndicator("功能4");
44         str4.setContent(new Intent(SdutMainActivity.this,SdutFindOldman.class));
45         mth.addTab(str4);
46         
47         TabSpec str5 = mth.newTabSpec("function_5").setIndicator("功能5");
48         str5.setContent(new Intent(SdutMainActivity.this,SdutFindOldman.class));
49         mth.addTab(str5);
50         
51         //底部菜单栏点击事件
52         radioGroup = (RadioGroup) findViewById(R.id.main_radio);
53         radioGroup.setOnCheckedChangeListener(new OnCheckedChangeListener() {
54             
55             @Override
56             public void onCheckedChanged(RadioGroup group, int checkedId) {
57                 // TODO Auto-generated method stub
58                 switch(checkedId)
59                 {
60             case R.id.radio_button0:mth.setCurrentTabByTag("function_1");break;
61             case R.id.radio_button1:mth.setCurrentTabByTag("function_2");break;
62             case R.id.radio_button2:mth.setCurrentTabByTag("function_3");break;
63             case R.id.radio_button3:mth.setCurrentTabByTag("function_4");break;
64             case R.id.radio_button4:mth.setCurrentTabByTag("function_5");break;
65 
66                 }
67             }
68         });
69     }
70     
71     //设置 返回键的 按钮响应事件
72     @Override
73     public boolean dispatchKeyEvent(KeyEvent event) {
74         // TODO Auto-generated method stub
75          if (event.getAction() == KeyEvent.ACTION_DOWN && event.getKeyCode() == KeyEvent.KEYCODE_BACK)
76           {
77            new AlertDialog.Builder(this).setCancelable(false).setTitle("温馨提示").setMessage("您确定要退出吗?").setPositiveButton("确定", new DialogInterface.OnClickListener()
78            {
79             public void onClick(DialogInterface dialog, int which)
80             {
81              finish();
82             }
83            }).setNegativeButton("取消", new DialogInterface.OnClickListener()
84            {
85             public void onClick(DialogInterface dialog, int which)
86             {
87             }
88            }).show();
89            return true;// 不知道返回true或是false有什么区别??
90           }
91 
92         return super.dispatchKeyEvent(event);
93     }
94 }

主代码