知识体系八：解析 apk 文件

手动解析apk文件：

    String path = Environment.getExternalStorageDirectory() +"/Music/ambience.apk";
    File file =new File(path);
    PackageManager manager = getPackageManager();
    PackageInfo info = manager.getPackageArchiveInfo(path,PackageManager.GET_ACTIVITIES);
    Log.e("=====packageName=======" + info.applicationInfo.icon,"=========" + info.applicationInfo.labelRes);
    AssetManager assets =null;
    try {
        assets = AssetManager.class.newInstance();
        Method method = AssetManager.class.getMethod("addAssetPath",String.class);
        method.invoke(assets,path);
    }catch (Exception e) {
        Log.e("==packageName===","=======1====" + e);
    }
   Resources resources =new Resources(assets, getResources().getDisplayMetrics(), getResources().getConfiguration());           textView.setImageDrawable(resources.getDrawable(info.applicationInfo.icon));
    Log.e("==packageName===","=======1====" + resources.getString(info.applicationInfo.labelRes));
    String clas =null;
    for (ActivityInfo ac : info.activities){
     if ("LauncherActivity".equals(resources.getString(ac.labelRes))){
         clas = ac.name;
         break;
        }
}
Log.e("==activity===" + clas,"==LauncherActivity==");
    Intent intent =new Intent();
    intent.setComponent(new ComponentName(info.packageName,clas));
    startActivity(intent);
}