android 类似QQ 换皮肤 实现思路 apk资源共享
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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。
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public class StartAct extends Activity {
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/** Called when the activity is first created. */
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@Override
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public void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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// setContentView(R.layout.main);
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Button btn = new Button(this);
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btn.setText("TO SECOND");
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btn.setOnClickListener(new OnClickListener() {
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@Override
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public void onClick(View v) {
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// TODO Auto-generated method stub
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Intent intent = new Intent(StartAct.this, SecontAct.class);
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StartAct.this.startActivity(intent);
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}
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});
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this.setContentView(btn);
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try {
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Context other = this.createPackageContext("com.app.share2", CONTEXT_IGNORE_SECURITY|CONTEXT_INCLUDE_CODE);
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Class<?> c = other.getClassLoader().loadClass("com.app.share2.R");
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Class<?>[] cl = c.getClasses();
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int b =0;
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for (int i = 0; i < cl.length; i++) {
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Log.d("TAG", cl[i].getSimpleName());
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Field field[] = cl[i].getFields();
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for (int j = 0; j < field.length; j++) {
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Log.d("TAG", "NAME:"+field[j].getName()+"--VALUE:"+field[j].getInt(field[j].getName()));
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if(field[j].getName().equals("button1")) {
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b = field[j].getInt(field[j].getName());
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Log.d("TAG", "--------id");
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}
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};
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}
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View v = LayoutInflater.from(other).inflate(R.layout.main, null);
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Button btn1 = (Button) v.findViewById(b);
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btn1.setOnClickListener(new OnClickListener() {
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@Override
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public void onClick(View v) {
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// TODO Auto-generated method stub
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Log.d("TAG", "BUTTON FROM Share2");
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Toast.makeText(StartAct.this, "BUTTON FROM Share2", Toast.LENGTH_SHORT).show();
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}
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});
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this.setContentView(v);
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} catch (NameNotFoundException e) {
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// TODO Auto-generated catch block
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e.printStackTrace();
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} catch (ClassNotFoundException e) {
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// TODO Auto-generated catch block
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e.printStackTrace();
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} catch (IllegalArgumentException e) {
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// TODO Auto-generated catch block
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e.printStackTrace();
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} catch (IllegalAccessException e) {
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// TODO Auto-generated catch block
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e.printStackTrace();
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}
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}
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}
资源apk包Layout
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<?xml version="1.0" encoding="utf-8"?>
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<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
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android:orientation="vertical"
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android:layout_width="fill_parent"
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android:layout_height="fill_parent"
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>
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<TextView
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android:layout_width="fill_parent"
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android:layout_height="wrap_content"
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android:text="Share2"
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/>
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<Button android:text="Button" android:id="@+id/button1" android:layout_width="wrap_content" android:layout_height="wrap_content"></Button>
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</LinearLayout>