高仿Android 点心桌面皮肤实现方式

不错的帖子：

android之ViewFlipper实现左右滑动动画效果
http://www.eoeandroid.com/thread-235446-1-1.html

Android TreeView 树形结构
http://www.eoeandroid.com/thread-235033-1-1.html

前段时间有空研究了一下Launcher，做了一个自己的桌面，像点心桌面那样可以切换皮肤的，所以在这里和大家分享一下应用皮肤的实现方式。我是这样实现的，主的应用是一个apk，皮肤是一个apk，在主的应用中读取已安装的apk。
先附上几张切图

先来讲解一下皮肤apk吧，下面是皮肤apk的AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"package="com.app.GreenSkinExample"android:versionCode="1"android:versionName="1.0"><application android:icon="@drawable/icon" android:label="@string/app_name"><activity android:name=".GreenSkin"android:label="@string/app_name"><intent-filter><action android:name="android.intent.action.MAIN" /><action android:name="com.app.skinexample.Theme"/><category android:name="android.intent.category.DEFAULT" /></intent-filter></activity></application><uses-sdk android:minSdkVersion="4" /></manifest>

其中<action android:name="com.app.skinexample.Theme"/>是比较重要的，我们就靠它在主应用中找到此皮肤。然后皮肤apk的res文件夹里放需要的图片、文字、颜色资源。

在主应用apk中，我们用以下代码片段来读取皮肤apk

public static final String THEME_ACTION = "com.app.skinexample.Theme" ;
public List<ResolveInfo> themes ;public void GetAllThemes(){Intent mIntent = new Intent(THEME_ACTION) ;PackageManager pm = getPackageManager() ;themes = pm.queryIntentActivities(mIntent, 0) ;}

最重要的，如何在主apk中使用皮肤apk替换原有的呢，看一下代码

public Resources themeResources = null ;
public String themePackage ;
public void ThemeLoading() 
{PackageManager pm = getPackageManager() ;try {themeResources = pm.getResourcesForApplication(themePackage) ;} catch (NameNotFoundException e) {//The saved theme was uninstalled so we save the default one
                                   }
Drawable icon = null ;int resource_id=themeResources.getIdentifier (resourceName, "drawable", themePackage);if(resource_id!=0){icon=themeResources.getDrawable(resource_id);}}

仿点心桌面皮肤实现方式程序源码：

ThemeUtil.java

public static void DisplayToast(Context context,String text){Toast toast ;toast = Toast.makeText(context ,text, Toast.LENGTH_SHORT);toast.setGravity(Gravity.CENTER, 0, 0);toast.show();}public static void loadThemeResource(Resources themeResources,String themePackage, String item_name, View item,int themeType) {Drawable d=null;if(themeResources!=null){int resource_id=themeResources.getIdentifier (item_name, "drawable", themePackage);if(resource_id!=0){d=themeResources.getDrawable(resource_id);if(themeType==ThemeAttributes.THEME_ITEM_FOREGROUND && item instanceof ImageView){Drawable tmp=((ImageView)item).getDrawable();if(tmp!=null){tmp.setCallback(null);tmp=null;}((ImageView)item).setImageDrawable(d);}else{Drawable tmp=item.getBackground();if(tmp!=null){tmp.setCallback(null);tmp=null;}item.setBackgroundDrawable(d);}}}}public static Drawable loadThemeDrawable(Resources themeResources , String resourceName , String themePackage){Drawable icon = null ;int resource_id=themeResources.getIdentifier (resourceName, "drawable", themePackage);if(resource_id!=0){icon=themeResources.getDrawable(resource_id);}return icon ;}public static int loadThemeColor(Resources themeResources , String resourceName , String themePackage){int color = 0 ;int resource_id=themeResources.getIdentifier (resourceName, "color", themePackage);if(resource_id!=0){color=themeResources.getColor(resource_id);}return color ;}