Android给应用定制皮肤

在实现程序功能的同时，如果能让程序界面更加美观，有锦上添花之妙.

先说思路:

1）皮肤也就是相关的资源文件单独放置在某个工程中,一种皮肤一个工程文件.一个工程包括N多的资源文件,多个工程间资源的关系是,文件名,资源ID等完全一样.不同的可能是图片资源,style等的设置不一样.

皮肤工程在AndroidManifest.xml中配置android:sharedUserId="com.eric.skinmain".

表明允许com.eric.skinmain访问本工程中的资源文件. com.eric.skinmain是主项目的包名

3）主项目通过 this.createPackageContext("com.eric.blackskin",Context.CONTEXT_IGNORE_SECURITY);

获取到com.eric.blackskin对应的Context,然后通过返回的context对象就可以访问到com.eric.blackskin中的任何资源,如同访问自身的资源一样.

注：记得先安装皮肤工程对应的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;                                       }                               }                       });               }       }