Why does ClassLoader.loadClass ALWAYS throw ClassNotFoundException in android?

Question

Take a look at:

    Context contxt  = createPackageContext("com.exam.provider", CONTEXT_IGNORE_SECURITY); // I know, the package must be (and IS) already installed ;-)

    ClassLoader loader = contxt.getClassLoader();
    loader.loadClass("com.exam.provider.MyGestureOverlayView"); // I'm sure this class DOES exist in "com.exam.provider"

But this code always throws java.lang.ClassNotFoundException. Also note that both android applications share the same user id via:

    <manifest
        ...
        android:sharedUserId="whatever"
        ...
    >

I am completely frustrated. Any idea?

DOn't you need the CONTEXT_INCLUDE_CODE flag? – G. Blake Meike Mar 08 '14 at 17:10 — G. Blake Meike, Mar 08 '14 at 17:10

score 3 · Accepted Answer · answered Mar 08 '14 at 17:27

3

Your code works fine, for me, if I just add the CONTEXT_INCLUDE_CODE flag in the call to createPackageContext.

answered Mar 08 '14 at 17:27

G. Blake Meike

6,615
3
24
40

I can't believe that. My only mistake was to type 'spaces' between CONTEXT_INCLUDE_CODE and CONTEXT_IGNORE_SECURITY; like this: "CONTEXT_IGNORE_SECURITY | CONTEXT_INCLUDE_CODE". It is a habit from C++ times ;-). I changed it to "CONTEXT_IGNORE_SECURITY|CONTEXT_INCLUDE_CODE" and it works like a charm. yahoooooooooooooo – Joseph_Marzbani Mar 09 '14 at 05:04

score 0 · Answer 2 · answered Mar 08 '14 at 18:11

0

Is the error at compile-time or run-time

'ClassNotFoundException' here may be because the package is not found at runtime. {after successful compilation}

answered Mar 08 '14 at 18:11

Nik theGeeK

181
12

score 0 · Answer 3 · answered Apr 11 '15 at 22:34

0

Uninstalling the app from the device or emulator first solved this problem for me.

answered Apr 11 '15 at 22:34

Ron

91
1
5

Why does ClassLoader.loadClass ALWAYS throw ClassNotFoundException in android?

3 Answers3