主题：Android 皮肤apk实现换肤

运行效果:





没有安装顺序，先安装皮肤后安装主程序完全可以。
安装成功之后在程序里面找不皮肤1/2/3启动文件，因为皮肤只能在主程序中使用。在卸载里面能看到安装上的皮肤，可以卸载掉。

好了来看下主要代码:
Java代码 
package com.iaiai; 
 
import java.util.ArrayList; 
import java.util.List; 
import java.util.regex.Matcher; 
import java.util.regex.Pattern; 
 
import android.app.Activity; 
import android.content.Context; 
import android.content.pm.PackageInfo; 
import android.content.pm.PackageManager.NameNotFoundException; 
import android.os.Bundle; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.view.ViewGroup.LayoutParams; 
import android.widget.Button; 
import android.widget.LinearLayout; 
 
/**
* 
* <p>
* Title: MainActivity.java
* </p>
* <p>
* E-Mail: [e-mail]
* </p>
* <p>
* QQ: 176291935
* </p>
* <p>
* Http: iaiai.iteye.com
* </p>
* <p>
* Create time: 2011-10-18
* </p>
* 
* @author 丸子
* @version 0.0.1
*/ 
public class MainActivity extends Activity { 
 
    private ArrayList<PackageInfo> getAllSkin() { 
        ArrayList<PackageInfo> skinList = new ArrayList<PackageInfo>(); 
        List<PackageInfo> packs = getPackageManager().getInstalledPackages(0); 
        for (PackageInfo p : packs) { 
            if (isSkinPackage(p.packageName)) { 
                skinList.add(p); 
            } 
        } 
        return skinList; 
    } 
 
    private boolean isSkinPackage(String packageName) { 
        String rex = "com.iaiai\\w"; 
        Pattern pattern = Pattern.compile(rex); 
        Matcher matcher = pattern.matcher(packageName); 
        return matcher.find(); 
    } 
 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
        super.onCreate(savedInstanceState); 
        setContentView(R.layout.main); 
 
        final LinearLayout layout = (LinearLayout) findViewById(R.id.layout); 
 
        ((Button) findViewById(R.id.def)) 
                .setOnClickListener(new OnClickListener() { 
                    @Override 
                    public void onClick(View v) { 
                        layout.setBackgroundDrawable(getResources() 
                                .getDrawable(R.drawable.bg)); 
                    } 
                }); 
 
        ArrayList<PackageInfo> skinList = getAllSkin(); 
 
        for (int i = 0; i < skinList.size(); i++) { 
            try { 
                final Context friendContext = createPackageContext( 
                        skinList.get(i).packageName, 
                        Context.CONTEXT_IGNORE_SECURITY); 
 
                Button btn = new Button(this); 
                btn.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, 
                        LayoutParams.WRAP_CONTENT)); 
                btn.setText(friendContext.getText(R.string.app_name)); 
                btn.setOnClickListener(new OnClickListener() { 
                    @Override 
                    public void onClick(View v) { 
                        layout.setBackgroundDrawable(friendContext 
                                .getResources().getDrawable(R.drawable.bg)); 
                    } 
                }); 
 
                layout.addView(btn); 
            } catch (NameNotFoundException e) { 
                e.printStackTrace(); 
            } 
        } 
    } 
 
} 


其它请下载附件查看。