Converting drawable resource to Bitmap Android

Question

I am Building an Npuzzle App.
The current issue I face is bringing a drawable object into my Activity so that I can convert it to a bitmap for splitting. I have found and attempted to use this Approach:

Drawable hold = Puzzle.this.getResources().getDrawable(R.drawable.img1);
BitmapDrawable hold2 = (BitmapDrawable) hold;
Bitmap bitPhoto = hold2.getBitmap();

When I run my app I get a null pointer exception in the first line of code. Any suggestions on how to fix this problem? this is the logcat when i run the program:

 11-25 12:07:46.441    5388-5388/com.example.anthony.puzzler E/AndroidRuntime﹕ FATAL EXCEPTION: main
java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.example.anthony.puzzler/com.example.anthony.puzzler.Puzzle}: java.lang.NullPointerException
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2034)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2135)
        at android.app.ActivityThread.access$700(ActivityThread.java:143)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1241)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:137)
        at android.app.ActivityThread.main(ActivityThread.java:4950)
        at java.lang.reflect.Method.invokeNative(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:511)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1004)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:771)
        at dalvik.system.NativeStart.main(Native Method)
 Caused by: java.lang.NullPointerException
        at android.content.ContextWrapper.getResources(ContextWrapper.java:81)
        at com.example.anthony.puzzler.Puzzle.<init>(Puzzle.java:28)
        at java.lang.Class.newInstanceImpl(Native Method)
        at java.lang.Class.newInstance(Class.java:1319)
        at android.app.Instrumentation.newActivity(Instrumentation.java:1068)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2025)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2135)
            at android.app.ActivityThread.access$700(ActivityThread.java:143)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1241)
            at android.os.Handler.dispatchMessage(Handler.java:99)
            at android.os.Looper.loop(Looper.java:137)
            at android.app.ActivityThread.main(ActivityThread.java:4950)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:511)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1004)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:771)
            at dalvik.system.NativeStart.main(Native Method)

Answer 1

Why don't you just directly get the media as a bitmap?

Bitmap bm = BitmapFactory.decodeResource(getResources(), R.drawable.img1);

Should be simpler than getting a drawable and casting it.

Answer 2

Clean up your project and rebuild it to make sure the id of the drawable is the correct one.

Check if getResources() is actually returning something.

Edit: calling getResources() before super.onCreate() method returns, it causes NPE.