在實現程序功能的同時，如果能讓程序界面更加美觀，有錦上添花之妙.

先說思路:

1）皮膚也就是相關的資源文件單獨放置在某個工程中,一種皮膚一個工程文件.一個工程包括N多的資源文件,多個工程間資源的關系是,文件名,資源ID等完全一樣.不同的可能是圖片資源,style等的設置不一樣.

皮膚工程在AndroidManifest.xml中配置android:sharedUserId="com.eric.skinmain".

表明允許com.eric.skinmain訪問本工程中的資源文件. com.eric.skinmain是主項目的包名

3）主項目通過 this.createPackageContext("com.eric.blackskin",Context.CONTEXT_IGNORE_SECURITY);

獲取到com.eric.blackskin對應的Context,然后通過返回的context對象就可以訪問到com.eric.blackskin中的任何資源,如同訪問自身的資源一樣.

注：記得先安裝皮膚工程對應的apk文件.

public class main extends Activity { 
        /** Called when the activity is first created. */ 
        private LinearLayout showBg; 
        private Button btn; 
        private Context green_skin_Context = null; 
        private Context black_skin_Context = null; 
        int flag = 0; 
 
        @Override 
        public void onCreate(Bundle savedInstanceState) { 
                super.onCreate(savedInstanceState); 
                setContentView(R.layout.main); 
                showBg = (LinearLayout) findViewById(R.id.linear_layout_1); 
                try { 
                        green_skin_Context = this.createPackageContext( 
                                        "com.eric.greenskin", Context.CONTEXT_IGNORE_SECURITY); 
                } catch (NameNotFoundException e) { 
                        e.printStackTrace(); 
                } 
                try { 
                        black_skin_Context = this.createPackageContext( 
                                        "com.eric.blackskin", Context.CONTEXT_IGNORE_SECURITY); 
                } catch (NameNotFoundException e) { 
                        e.printStackTrace(); 
                } 
                btn = (Button) findViewById(R.id.btn_change_skin); 
                btn.setOnClickListener(new OnClickListener() { 
                        @Override 
                        public void onClick(View v) { 
                                if (flag == 0) { 
                                        showBg.setBackgroundDrawable(green_skin_Context 
                                                        .getResources().getDrawable(R.drawable.bg)); 
                                        btn.setBackgroundDrawable(green_skin_Context 
                                                        .getResources().getDrawable(R.drawable.btn_normal)); 
                                         
                                        flag = 1; 
                                } else if (flag == 1) { 
                                        showBg.setBackgroundDrawable(black_skin_Context 
                                                        .getResources().getDrawable(R.drawable.bg)); 
                                        btn.setBackgroundDrawable(black_skin_Context 
                                                        .getResources().getDrawable(R.drawable.btn_normal)); 
                                        flag = 0; 
                                } 
                        } 
                }); 
        } 
}