java.lang.NullPointerException: Attempt to invoke virtual method 'boolean android.graphics.Bitmap.compress(android.graphics.Bitmap$CompressFormat, int, java.io.OutputStream)' on a null object reference

Stack Overflow | alex cz | 5 months ago
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  1. 0

    Bitmap is null reading from file

    Stack Overflow | 5 months ago | alex cz
    java.lang.NullPointerException: Attempt to invoke virtual method 'boolean android.graphics.Bitmap.compress(android.graphics.Bitmap$CompressFormat, int, java.io.OutputStream)' on a null object reference
  2. 0

    From the path of local device , get the image to set as wallpaper

    Stack Overflow | 3 months ago | beginner
    java.lang.RuntimeException: Error receiving broadcast Intent { act=WIFICHANGE flg=0x10 (has extras) } in delusions.com.myapplication.ScrollingActivity$2@4e59142
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    Root Cause Analysis

    1. java.lang.NullPointerException

      Attempt to invoke virtual method 'boolean android.graphics.Bitmap.compress(android.graphics.Bitmap$CompressFormat, int, java.io.OutputStream)' on a null object reference

      at android.app.WallpaperManager.setBitmap()
    2. Android Platform
      WallpaperManager.setBitmap
      1. android.app.WallpaperManager.setBitmap(WallpaperManager.java:956)
      1 frame
    3. coolwallpaper.alexcz.coolwallpaper
      Main$1.onClick
      1. coolwallpaper.alexcz.coolwallpaper.Main$1.onClick(Main.java:54)
      1 frame
    4. Android Platform
      ActivityThread.main
      1. android.view.View.performClick(View.java:5197)
      2. android.view.View$PerformClick.run(View.java:20926)
      3. android.os.Handler.handleCallback(Handler.java:739)
      4. android.os.Handler.dispatchMessage(Handler.java:95)
      5. android.os.Looper.loop(Looper.java:145)
      6. android.app.ActivityThread.main(ActivityThread.java:5951)
      6 frames
    5. Java RT
      Method.invoke
      1. java.lang.reflect.Method.invoke(Native Method)
      2. java.lang.reflect.Method.invoke(Method.java:372)
      2 frames
    6. Android
      ZygoteInit.main
      1. com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1400)
      2. com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1195)
      2 frames