Reading an image file into bitmap from sdcard why am I getting a NullPointerException

Question

How can I read an image file into bitmap from sdcard        path   Environment getExternalStorageDirectory   getAbsolutePath       System out println  pathhhhhhhhhhhhhhhhhhhh1111111112222222      path      path   path          flower2 jpg     System out println  pathhhhhhhhhhhhhhhhhhhh111111111      path     Bitmap bitmap   BitmapFactory decodeFile  path  options        I am getting a NullPointerException for bitmap  It means that the bitmap is null  But I have an image   jpg  file stored in sdcard as  flower2 jpg   What s the problem

User · Answer

Try this code   Bitmap bitmap   null  File f   new File  path   BitmapFactory Options options   new BitmapFactory Options    options inPreferredConfig   Bitmap Config ARGB 8888  try       bitmap   BitmapFactory decodeStream new FileInputStream f   null  options     catch  FileNotFoundException e        e printStackTrace               image setImageBitmap bitmap

User · Answer

The MediaStore API is probably throwing away the alpha channel  i e  decoding to RGB565   If you have a file path  just use BitmapFactory directly  but tell it to use a format that preserves alpha   BitmapFactory Options options   new BitmapFactory Options    options inPreferredConfig   Bitmap Config ARGB 8888  Bitmap bitmap   BitmapFactory decodeFile photoPath  options   selected photo setImageBitmap bitmap     or   http   mihaifonoage blogspot com 2009 09 displaying-images-from-sd-card-in html

User · Answer

It works   Bitmap bitmap   BitmapFactory decodeFile filePath

User · Answer

I wrote the following code to convert an image from sdcard to a Base64 encoded string to send as a JSON object And it works great   String filepath     sdcard temp png   File imagefile   new File filepath   FileInputStream fis   null  try       fis   new FileInputStream imagefile         catch  FileNotFoundException e        e printStackTrace       Bitmap bm   BitmapFactory decodeStream fis   ByteArrayOutputStream baos   new ByteArrayOutputStream      bm compress Bitmap CompressFormat JPEG  100   baos       byte   b   baos toByteArray     encImage   Base64 encodeToString b  Base64 DEFAULT

[android] Reading an image file into bitmap from sdcard, why am I getting a NullPointerException?

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