Android获取其他应用中的assets资源

  @Override
  public Context createPackageContext(String packageName, int flags)
    throws PackageManager.NameNotFoundException {
    return mBase.createPackageContext(packageName, flags);
  }

public static final int CONTEXT_INCLUDE_CODE = 0x00000001;
public static final int CONTEXT_IGNORE_SECURITY = 0x00000002;

//栗子：获取一个drawable 的id
      int identifier = bContext.getResources().getIdentifier("bg", "drawable", bContext.getPackageName());

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    Log.e("GFZY", "onCreate: ");
    try {
      Context bContext = this.createPackageContext("pers.jibai.matrixtext"
          , Context.CONTEXT_INCLUDE_CODE
              | Context.CONTEXT_IGNORE_SECURITY);
      ClassLoader loader = bContext.getClassLoader();
      Class<?> clazz = loader.loadClass("pers.jibai.matrixtext.A");
      Object a = clazz.getConstructor().newInstance();
      Method getAssetBg = clazz.getMethod("getBgMp4", Context.class);
      Log.e("GFZY", "onCreate: " + getAssetBg.getName());
      InputStream invoke = (InputStream) getAssetBg.invoke(a, bContext);
      BufferedReader reader = new BufferedReader(new InputStreamReader(invoke));
      String s = reader.readLine();
      reader.close();
      ((TextView) findViewById(R.id.t)).setText(s);
    } catch (Exception e) {
      e.printStackTrace();
      Log.e("GFZY", "onCreate: " + e.getMessage());
    }
  }

public class A {
  public void asd() {
    Log.e("GFZY", "asd:我是matrix ");
  }
  public InputStream getBgMp4(Context context) {
    try {
      return context.getAssets().open("asd");
    } catch (IOException e) {
      e.printStackTrace();
    }
    return null;
  }
}