Android: java.lang.NullPointerException bei android.graphics.Bitmap.createScaledBitmap (Bitmap.java:490)

Question

Ich versuche, skalierte Bitmap zu erstellen, aber auf wenigen Geräten (nicht alle) bekomme ich diese Ausnahme.

Bitmap bit = BitmapFactory.decodeFile(uri); 
Bitmap bitmap1= Bitmap.createScaledBitmap(bit, 50, 50, true); <--- This line causes null pointer 

Der komplette Stacktrace ist unten:

java.lang.NullPointerException 
    at android.graphics.Bitmap.createScaledBitmap(Bitmap.java:490) 
    at com.my.app.adapters.MyAdapter.onBindViewHolder(MyAdapter.java:101) 
    at com.my.app.adapters.MyAdapter.onBindViewHolder(MyAdapter.java:35) 
    at android.support.v7.widget.RecyclerView$Adapter.onBindViewHolder(RecyclerView.java:5217) 
    at android.support.v7.widget.RecyclerView$Adapter.bindViewHolder(RecyclerView.java:5250) 
    at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:4487) 
    at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:4363) 
    at android.support.v7.widget.LinearLayoutManager$LayoutState.next(LinearLayoutManager.java:1961) 
    at android.support.v7.widget.GridLayoutManager.layoutChunk(GridLayoutManager.java:458) 
    at android.support.v7.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1333) 
    at android.support.v7.widget.LinearLayoutManager.onLayoutChildren(LinearLayoutManager.java:562) 
    at android.support.v7.widget.GridLayoutManager.onLayoutChildren(GridLayoutManager.java:171) 
    at android.support.v7.widget.RecyclerView.dispatchLayout(RecyclerView.java:2900) 
    at android.support.v7.widget.RecyclerView.onLayout(RecyclerView.java:3071) 
    at android.view.View.layout(View.java:14143) 
    at android.view.ViewGroup.layout(ViewGroup.java:4666) 
    at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1655) 
    at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1513) 
    at android.widget.LinearLayout.onLayout(LinearLayout.java:1426) 
    at android.view.View.layout(View.java:14143) 
    at android.view.ViewGroup.layout(ViewGroup.java:4666) 
    at android.widget.FrameLayout.onLayout(FrameLayout.java:448) 
    at android.view.View.layout(View.java:14143) 
    at android.view.ViewGroup.layout(ViewGroup.java:4666) 
    at android.widget.FrameLayout.onLayout(FrameLayout.java:448) 
    at android.view.View.layout(View.java:14143) 
    at android.view.ViewGroup.layout(ViewGroup.java:4666) 
    at android.widget.FrameLayout.onLayout(FrameLayout.java:448) 
    at android.view.View.layout(View.java:14143) 
    at android.view.ViewGroup.layout(ViewGroup.java:4666) 
    at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1655) 
    at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1513) 
    at android.widget.LinearLayout.onLayout(LinearLayout.java:1426) 
    at android.view.View.layout(View.java:14143) 
    at android.view.ViewGroup.layout(ViewGroup.java:4666) 
    at android.widget.FrameLayout.onLayout(FrameLayout.java:448) 
    at android.view.View.layout(View.java:14143) 
    at android.view.ViewGroup.layout(ViewGroup.java:4666) 
    at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1655) 
    at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1513) 
    at android.widget.LinearLayout.onLayout(LinearLayout.java:1426) 
    at android.view.View.layout(View.java:14143) 
    at android.view.ViewGroup.layout(ViewGroup.java:4666) 
    at android.widget.FrameLayout.onLayout(FrameLayout.java:448) 
    at android.view.View.layout(View.java:14143) 
    at android.view.ViewGroup.layout(ViewGroup.java:4666) 
    at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2024) 
    at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1845) 
    at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1138) 
    at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:4645) 
    at android.view.Choreographer$CallbackRecord.run(Choreographer.java:725) 
    at android.view.Choreographer.doCallbacks(Choreographer.java:555) 
    at android.view.Choreographer.doFrame(Choreographer.java:525) 
    at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:711) 
    at android.os.Handler.handleCallback(Handler.java:615) 
    at android.os.Handler.dispatchMessage(Handler.java:92) 
    at android.os.Looper.loop(Looper.java:174) 
    at android.app.ActivityThread.main(ActivityThread.java:4952) 
    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:1027) 
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:794) 
    at dalvik.system.NativeStart.main(Native Method) 

Wenn ich jetzt auf Bitmap.java Linie 490 aussehen, gibt es keinen Code dort. Ich bin mir nicht sicher, wie ich dieses Problem lösen soll. Kann jemand irgendwelche Vorschläge machen, oder wird es noch besser, wenn jemand helfen kann? Danke im Voraus !!

 long bufferSize = (long)elements << shift; 
     long pixelSize = getByteCount(); 
               <-- Line 490 
     if (bufferSize < pixelSize) { 
      throw new RuntimeException("Buffer not large enough for pixels"); 
     } 

Answer 1

von Android Dokumentation:

public static Bitmap decodeFile (String pathName)

Sie den Pfad als String-Objekt in Datei passieren sollte, nicht ein Objekt Uri.