android 類似QQ 換皮膚 實現思路 apk資源共享

  

1、首先在AndroidManifest.xml中的<manifest>中加入android:sharedUserId="共享id"----具有相同id的apk可以不受限制訪問。

2、根據包名創建Context，在Activity下有提供方法createPackageContext能夠依據包名創建。

3、獲取共享的Apk資源。

注意：

1、Activity中的findViewById()與View中的findViewById()區別在於：

Activity需要對setContextView()後的Layout才能由findViewById()獲得View。

View只需要有對象即可由findViewById()獲得在View中包含id的View。

2、在資源獲取方面主要獲取那個apk下的資源主要是由Context決定。

 

 主apk包名：com.app.share;

資源apk包名：com.app.share2;

主Activity中獲取資源apk中R,並且生成Layout對id為button1的按鈕設置監聽。

view plainpublic 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-generated catch block 

           e.printStackTrace(); 

       } catch (IllegalAccessException e) { 

           // TODO Auto-generated catch block 

           e.printStackTrace(); 

       } 

   } 

} 

資源apk包Layout view plain<?xml version="1.0" encoding="utf-8"?> 

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 

   android:orientation="vertical" 

   android:layout_width="fill_parent" 

   android:layout_height="fill_parent" 

   > 

<TextView   

   android:layout_width="fill_parent" 

   android:layout_height="wrap_content" 

   android:text="Share2" 

   /> 

<Button android:text="Button" android:id="@+id/button1" android:layout_width="wrap_content" android:layout_height="wrap_content"></Button> 

</LinearLayout>