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android类似QQ换皮肤,实现思路,apk资源共享

1、首先在AndroidManifest.xml中的<manifest>中加入android:sharedUserId="共享id"----具有相同id的apk可以不受限制访问。
2、根据包名创建Context,在Activity下有提供方法createPackageContext能够依据包名创建。
3、获取共享的Apk资源。
注意:
1、Activity中的findViewById()与View中的findViewById()区别在于:
Activity需要对setContextView()后的Layout才能由findViewById()获得View。
View只需要有对象即可由findViewById()获得在View中包含id的View。
2、在资源获取方面主要获取那个apk下的资源主要是由Context决定。
 
在资源apk没安装前:


资源文件安装后:


主apk包名:com.app.share;
资源apk包名:com.app.share2;
主Activity中获取资源apk中R,并且生成Layout对id为button1的按钮设置监听。
Java代码 
public class StartAct extends Activity {   
    /** Called when the activity is first created. */   
    @Override   
    public void onCreate(Bundle savedInstanceState) {   
        super.onCreate(savedInstanceState);   
//        setContentView(R.layout.main);   
        Button btn = new Button(this);   
        btn.setText("TO SECOND");   
        btn.setOnClickListener(new OnClickListener() {   
               
            @Override   
            public void onClick(View v) {   
                // TODO Auto-generated method stub   
                Intent intent = new Intent(StartAct.this, SecontAct.class);   
                StartAct.this.startActivity(intent);   
            }   
        });   
        this.setContentView(btn);   
        try {      
            Context other = this.createPackageContext("com.app.share2", CONTEXT_IGNORE_SECURITY|CONTEXT_INCLUDE_CODE);   
            Class<?> c = other.getClassLoader().loadClass("com.app.share2.R");   
            Class<?>[] cl = c.getClasses();   
            int b =0;   
            for (int i = 0; i < cl.length; i++) {   
                Log.d("TAG", cl[i].getSimpleName());   
                Field field[] = cl[i].getFields();   
                for (int j = 0; j < field.length; j++) {   
                    Log.d("TAG", "NAME:"+field[j].getName()+"--VALUE:"+field[j].getInt(field[j].getName()));   
                    if(field[j].getName().equals("button1")) {   
                        b = field[j].getInt(field[j].getName());   
                        Log.d("TAG", "--------id");   
                    }   
                };   
            }   
            View v = LayoutInflater.from(other).inflate(R.layout.main, null);   
            Button btn1 = (Button) v.findViewById(b);   
            btn1.setOnClickListener(new OnClickListener() {   
                   
                @Override   
                public void onClick(View v) {   
                    // TODO Auto-generated method stub   
                    Log.d("TAG", "BUTTON FROM Share2");   
                    Toast.makeText(StartAct.this, "BUTTON FROM Share2", Toast.LENGTH_SHORT).show();   
                }   
            });   
            this.setContentView(v);   
        } catch (NameNotFoundException e) {   
            // TODO Auto-generated catch block   
            e.printStackTrace();   
        } catch (ClassNotFoundException e) {   
            // TODO Auto-generated catch block   
            e.printStackTrace();   
        } catch (IllegalArgumentException e) {   
            // TODO Auto-gen

补充:移动开发 , Android ,
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