title: How to remove this error ? java.lang.reflect.InvocationTargetException
body: <p><strong>I added All the needed permissions</strong></p>
  
  <pre><code> PackageManager packageManager = context.getPackageManager();
      Class&lt;?&gt; [] c = new Class[2];
      c[0] = String.class;
      c[1] = IPackageDataObserver.class;
      try {
  
      Object cleardata = packageManager.getClass().getMethod("clearApplicationUserData", c);
         Object[] o = new Object[2];
         o[0] = String.valueOf("my.app.withdata");
         o[1] = new ClearApplicationDataObserver();
  
      ((Method)cleardata).invoke(packageManager, o);
    }
      catch(Exception e) {e.printStackTrace();
   }
  
  02-02 16:08:26.629: W/System.err(709): java.lang.reflect.InvocationTargetException
  02-02 16:08:26.678: W/System.err(709):  at java.lang.reflect.Method.invokeNative(Native Method)
  02-02 16:08:26.738: W/System.err(709):  at java.lang.reflect.Method.invoke(Method.java:511)
  02-02 16:08:26.738: W/System.err(709):  at f.c.v.ClearUserDataUsingInterfaceActivity.run1(ClearUserDataUsingInterfaceActivity.java:105)
  02-02 16:08:26.778: W/System.err(709):  at f.c.v.ClearUserDataUsingInterfaceActivity$1.run(ClearUserDataUsingInterfaceActivity.java:52)
  02-02 16:08:26.778: W/System.err(709):  at java.lang.Thread.run(Thread.java:856)
  02-02 16:08:26.778: W/System.err(709): Caused by: java.lang.SecurityException: Neither user 10048 nor current process has android.permission.CLEAR_APP_USER_DATA.
  02-02 16:08:26.778: W/System.err(709):  at android.os.Parcel.readException(Parcel.java:1327)
  02-02 16:08:26.778: W/System.err(709):  at android.os.Parcel.readException(Parcel.java:1281)
  02-02 16:08:26.808: W/System.err(709):  at android.content.pm.IPackageManager$Stub$Proxy.clearApplicationUserData(IPackageManager.java:2568)
  02-02 16:08:26.808: W/System.err(709):  at android.app.ApplicationPackageManager.clearApplicationUserData(ApplicationPackageManager.java:1006)
  02-02 16:08:26.808: W/System.err(709):  ... 5 more
  </code></pre>