アンドロイド：java.lang.NullPointerException android.graphics.Bitmap.createScaledBitmap（Bitmap.java:490）

Question

スケーリングされたビットマップを作成しようとしていますが、いくつかのデバイス（すべてではない）でこの例外が発生します。

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

完全なスタックトレースは以下の通りです：私はBitmap.javaライン490を見たときに

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) 

は今、あそこに何のコードはありません。この問題を解決する方法がわかりません。誰かが何か提案をすることはできますか、誰かが助けることができればさらに良いでしょう。前もって感謝します ！！ Androidのドキュメントから

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

Answer 1

：

のpublic staticビットマップdecodeFile（文字列のパス名）

あなたはStringオブジェクトではなく、ウリオブジェクトとしてファイルへのパスを渡す必要があります。