【风马一族_Android】通过菜单的点击，跳转到不同界面

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布局的代码：activity_main.xml

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     xmlns:tools="http://schemas.android.com/tools"
 4     android:layout_width="match_parent"
 5     android:layout_height="match_parent"
 6     tools:context="com.sowsceo.sms.MainActivity">
 7
 8     <TabHost
 9         android:id="@android:id/tabhost"
10         android:layout_width="match_parent"
11         android:layout_height="match_parent">
12
13         <LinearLayout
14             android:layout_width="match_parent"
15             android:layout_height="match_parent"
16             android:orientation="vertical">
17
18             <TabWidget
19                 android:id="@android:id/tabs"
20                 android:layout_width="match_parent"
21                 android:layout_height="wrap_content"></TabWidget>
22
23             <FrameLayout
24                 android:id="@android:id/tabcontent"
25                 android:layout_width="match_parent"
26                 android:layout_height="match_parent"></FrameLayout>
27         </LinearLayout>
28     </TabHost>
29 </RelativeLayout>

逻辑代码 ：MainActivity.java　　

 1 import android.app.TabActivity;
 2 import android.content.Intent;
 3 import android.support.v7.app.AppCompatActivity;
 4 import android.os.Bundle;
 5 import android.view.View;
 6 import android.widget.TabHost;
 7
 8 public class MainActivity extends TabActivity {
 9
10     private TabHost mTabHos;
11
12     @Override
13     protected void onCreate(Bundle savedInstanceState) {
14         super.onCreate(savedInstanceState);
15         setContentView(R.layout.activity_main);
16
17         initTabHost();
18     }
19
20     /**
21      * 初始化tabHost
22      */
23     private void initTabHost() {
24         mTabHos = (TabHost) findViewById(android.R.id.tabhost);
25
26         addTabSpec("conversation","会话",R.drawable.tab_conversation,new Intent(this,ConversationUI.class));
27         addTabSpec("folder","文件夹",R.drawable.tab_folder,new Intent(this,FolderUI.class));
28         addTabSpec("group","群组",R.drawable.tab_group,new Intent(this,GroupUI.class));
29
30     }
31
32     /**
33      * 添加一个页签
34      * @param tag  标记
35      * @param label 标题
36      * @param icon 图标
37      * @param intent 指向的activity
38      */
39     private void addTabSpec(String tag,String label,int icon,Intent intent){
40         TabHost.TabSpec newTabSpec = mTabHos.newTabSpec(tag);
41
42         newTabSpec.setIndicator(label,getResources().getDrawable(icon));
43         //设置页签的标题与图标
44
45         newTabSpec.setContent(intent);
46         //设置页签指向的显示内容问activity
47
48         mTabHos.addTab(newTabSpec);
49         //添加页签
50     }
51
52 }

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三个菜单的布局与代码

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会话布局：activity_conversation_ui.xml

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     xmlns:tools="http://schemas.android.com/tools"
 4     android:layout_width="match_parent"
 5     android:layout_height="match_parent"
 6     android:paddingBottom="@dimen/activity_vertical_margin"
 7     android:paddingLeft="@dimen/activity_horizontal_margin"
 8     android:paddingRight="@dimen/activity_horizontal_margin"
 9     android:paddingTop="@dimen/activity_vertical_margin"
10     tools:context="com.sowsceo.sms.ConversationUI">
11
12     <TextView
13         android:layout_width="match_parent"
14         android:layout_height="match_parent"
15         android:text="会话"
16         android:textSize="50sp"/>
17 </RelativeLayout>

逻辑代码：ConversationUI.java

 1 import android.app.Activity;
 2 import android.support.v7.app.AppCompatActivity;
 3 import android.os.Bundle;
 4
 5 /**
 6  * 会话
 7  */
 8 public class ConversationUI extends Activity {
 9
10     @Override
11     protected void onCreate(Bundle savedInstanceState) {
12         super.onCreate(savedInstanceState);
13         setContentView(R.layout.activity_conversation_ui);
14     }
15 }

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布局代码：activity_folder_ui.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.sowsceo.sms.FolderUI">

    <TextView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:text="文件夹"
        android:textSize="50sp" />
</RelativeLayout>

逻辑代码：FolderUI.java

 1 import android.app.Activity;
 2 import android.support.v7.app.AppCompatActivity;
 3 import android.os.Bundle;
 4
 5 /**
 6  *
 7  * 创建者：风马一族
 8  * 时间： 2016/8/9 19:06
 9  * 说明：文件夹
10  */
11
12 public class FolderUI extends Activity {
13
14     @Override
15     protected void onCreate(Bundle savedInstanceState) {
16         super.onCreate(savedInstanceState);
17         setContentView(R.layout.activity_folder_ui);
18     }
19 }

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布局代码：activity_group_ui.xml

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:tools="http://schemas.android.com/tools"android:layout_width="match_parent"android:layout_height="match_parent"android:paddingBottom="@dimen/activity_vertical_margin"android:paddingLeft="@dimen/activity_horizontal_margin"android:paddingRight="@dimen/activity_horizontal_margin"android:paddingTop="@dimen/activity_vertical_margin"tools:context="com.sowsceo.sms.FolderUI">

    <TextViewandroid:layout_width="match_parent"android:layout_height="match_parent"android:text="文件夹"android:textSize="50sp" /></RelativeLayout>

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