【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

<?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.MainActivity">

    <TabHost
        android:id="@android:id/tabhost"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical">

            <TabWidget
                android:id="@android:id/tabs"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"></TabWidget>
            
            <FrameLayout
                android:id="@android:id/tabcontent"
                android:layout_width="match_parent"
                android:layout_height="match_parent"></FrameLayout>
        </LinearLayout>
    </TabHost>
</RelativeLayout>

 逻辑代码 ：MainActivity.java　　

import android.app.TabActivity;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.TabHost;

public class MainActivity extends TabActivity {

    private TabHost mTabHos;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        initTabHost();
    }

    /**
     * 初始化tabHost
     */
    private void initTabHost() {
        mTabHos = (TabHost) findViewById(android.R.id.tabhost);

        addTabSpec("conversation","会话",R.drawable.tab_conversation,new Intent(this,ConversationUI.class));
        addTabSpec("folder","文件夹",R.drawable.tab_folder,new Intent(this,FolderUI.class));
        addTabSpec("group","群组",R.drawable.tab_group,new Intent(this,GroupUI.class));

    }

    /**
     * 添加一个页签
     * @param tag  标记
     * @param label 标题
     * @param icon 图标
     * @param intent 指向的activity
     */
    private void addTabSpec(String tag,String label,int icon,Intent intent){
        TabHost.TabSpec newTabSpec = mTabHos.newTabSpec(tag);

        newTabSpec.setIndicator(label,getResources().getDrawable(icon));
        //设置页签的标题与图标

        newTabSpec.setContent(intent);
        //设置页签指向的显示内容问activity

        mTabHos.addTab(newTabSpec);
        //添加页签
    }

}

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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

<?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.ConversationUI">

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

 逻辑代码：ConversationUI.java

import android.app.Activity;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;

/**
 * 会话
 */
public class ConversationUI extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_conversation_ui);
    }
}

 -------------------------------------------

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

import android.app.Activity;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;

/**
 *
 * 创建者：风马一族
 * 时间： 2016/8/9 19:06
 * 说明：文件夹
 */

public class FolderUI extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_folder_ui);
    }
}

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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">

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

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