Android給應用定制皮膚

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; 
                                    } 
                            } 
                    }); 
            } 
    }