来源: 互联网  发布时间: 2014-02-18

Tab Layout 实例

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.hyzing"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk android:minSdkVersion="8" />

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >
        <activity
            android:name=".HelloTabWidget"
            android:label="@string/app_name" android:theme="@android:style/Theme.NoTitleBar">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:name=".AlbumsActivity"
            android:label="@string/app_name" >
        </activity>
        <activity
            android:name=".ArtistsActivity"
            android:label="@string/app_name" >
        </activity>
        <activity
            android:name=".SongsActivity"
            android:label="@string/app_name" >
        </activity>
    </application>

</manifest>

 

 

package com.hyzing;

import android.app.TabActivity;
import android.content.Intent;
import android.content.res.Resources;
import android.os.Bundle;
import android.widget.TabHost;

public class HelloTabWidget extends TabActivity {

	 public void onCreate(Bundle savedInstanceState) {
		 super.onCreate(savedInstanceState); 
		    setContentView(R.layout.main); 
		 
		    Resources res = getResources(); // Resource object to get Drawables 
		    TabHost tabHost = getTabHost();  // The activity TabHost 
		    TabHost.TabSpec spec;  // Resusable TabSpec for each tab 
		    Intent intent;  // Reusable Intent for each tab 
		 try{
		    // Create an Intent to launch an Activity for the tab (to be reused) 
		    intent = new Intent().setClass(this, ArtistsActivity.class); 
		 
		    // Initialize a TabSpec for each tab and add it to the TabHost 
		    spec = tabHost.newTabSpec("artists").setIndicator("Artists", 
		                      res.getDrawable(R.drawable.ic_tab_artists)) 
		                  .setContent(intent); 
		    tabHost.addTab(spec); 
		 
		    // Do the same for the other tabs 
		    intent = new Intent().setClass(this, AlbumsActivity.class); 
		    spec = tabHost.newTabSpec("albums").setIndicator("Albums", 
		                      res.getDrawable(R.drawable.ic_tab_artists1)) 
		                  .setContent(intent); 
		    tabHost.addTab(spec); 
		 
		    intent = new Intent().setClass(this, SongsActivity.class); 
		    spec = tabHost.newTabSpec("songs").setIndicator("Songs", 
		                      res.getDrawable(R.drawable.ic_tab_artists2)) 
		                  .setContent(intent); 
		    tabHost.addTab(spec); 
		 
		    tabHost.setCurrentTab(2); 
		 }catch(Exception e){
			 e.printStackTrace();
		 }

	 }
}

 

    

    来源: 互联网  发布时间: 2014-02-18

Drawable(hdpi,ldpi,mdpi)目录的区别
drawable(hdpi,ldpi,mdpi)有什么区别？

答:主要是为了支持多分辨率的.
hdpi里面主要放高分辨率的图片,如WVGA (480×800),FWVGA (480×854)
mdpi里面主要放中等分辨率的图片,如HVGA (320×480)
ldpi里面主要放低分辨率的图片,如QVGA (240×320)
系统会根据机器的分辨率来分别到这几个文件夹里面去找对应的图片
所以在开发程序时为了兼容不同平台不同屏幕，建议各自文件夹根据需求均存放不同版本图片

    

    来源: 互联网  发布时间: 2014-02-18

为程序员量身定制的12个目标

 

ugmbbc发布于 2012-01-15 11:53:19| <script src="/counter/sid/169509.html"></script> 4308 次阅读 字体：大 小 打印预览

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