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Editorial Team
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Asked: 2026-05-24T00:19:17+00:00

I need to take a photo with the camera using an activity. In my

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I need to take a photo with the camera using an activity. In my onActivityResult I am able to retrieve an uri, but I cannot get the file of this uri by using the File constructor. My intent looks like this:

   Intent cameraintent = new Intent("android.media.action.IMAGE_CAPTURE");
   File photo = new File(Environment.getExternalStorageDirectory(), "Pic.jpg");
   cameraintent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(photo));
   imageURICamera = Uri.fromFile(photo);
   startActivityForResult(cameraintent, 1);

I use the global defined “imageURICamera” in onActivityResult. I think that the problem has something to do with the Uri not having the proper attributes as the documentation for the file constructor states that:

“Constructs a new File using the path of the specified URI. uri needs to be an absolute and hierarchical Unified Resource Identifier with file scheme and non-empty path component, but with undefined authority, query or fragment components”

My onActivityResult looks like this at the moment:

 Uri u = imageURICamera;
 getContentResolver().notifyChange(u, null);
 ContentResolver cr = getContentResolver();
 Bitmap bm;
 try {
    bm = android.provider.MediaStore.Images.Media.getBitmap(cr, u);
    String path = getRealPathFromURI(u);
    File f = new File(path);

When i try to query the contentProvider for the path i get the following logcat output:

   07-25 20:04:04.310: ERROR/AndroidRuntime(16438): FATAL EXCEPTION: main
   07-25 20:04:04.310: ERROR/AndroidRuntime(16438): java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=1, result=-1, data=null} to activity {tod.dosetracker/tod.dosetracker.ImageViewerActivity}: java.lang.NullPointerException
   07-25 20:04:04.310: ERROR/AndroidRuntime(16438):     at android.app.ActivityThread.deliverResults(ActivityThread.java:2536)
   07-25 20:04:04.310: ERROR/AndroidRuntime(16438):     at android.app.ActivityThread.handleSendResult(ActivityThread.java:2578)
   07-25 20:04:04.310: ERROR/AndroidRuntime(16438):     at android.app.ActivityThread.access$2000(ActivityThread.java:117)
   07-25 20:04:04.310: ERROR/AndroidRuntime(16438):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:965)
   07-25 20:04:04.310: ERROR/AndroidRuntime(16438):     at  android.os.Handler.dispatchMessage(Handler.java:99)
   07-25 20:04:04.310: ERROR/AndroidRuntime(16438):     at       android.os.Looper.loop(Looper.java:123)
  07-25 20:04:04.310: ERROR/AndroidRuntime(16438):     at android.app.ActivityThread.main(ActivityThread.java:3691)
  07-25 20:04:04.310: ERROR/AndroidRuntime(16438):     at java.lang.reflect.Method.invokeNative(Native Method)
  07-25 20:04:04.310: ERROR/AndroidRuntime(16438):     at java.lang.reflect.Method.invoke(Method.java:507)
  07-25 20:04:04.310: ERROR/AndroidRuntime(16438):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:847)
  07-25 20:04:04.310: ERROR/AndroidRuntime(16438):     at  com.android.internal.os.ZygoteInit.main(ZygoteInit.java:605)
  07-25 20:04:04.310: ERROR/AndroidRuntime(16438):     at dalvik.system.NativeStart.main(Native Method)
  07-25 20:04:04.310: ERROR/AndroidRuntime(16438): Caused by: java.lang.NullPointerException
  07-25 20:04:04.310: ERROR/AndroidRuntime(16438):     at tod.dosetracker.ImageViewerActivity.getRealPathFromURI(ImageViewerActivity.java:315)
  07-25 20:04:04.310: ERROR/AndroidRuntime(16438):     at tod.dosetracker.ImageViewerActivity.onActivityResult(ImageViewerActivity.java:251)
  07-25 20:04:04.310: ERROR/AndroidRuntime(16438):     at  android.app.Activity.dispatchActivityResult(Activity.java:3934)
  07-25 20:04:04.310: ERROR/AndroidRuntime(16438):     at android.app.ActivityThread.deliverResults(ActivityThread.java:2532)
  07-25 20:04:04.310: ERROR/AndroidRuntime(16438):     ... 11 more
  07-25 20:04:04.315: ERROR/(2696): Dumpstate > /data/log/dumpstate_app_error
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1 Answer

  1. Editorial Team

    You already have specified this file should be saved to pic.jpg in your code

    File photo = new File(Environment.getExternalStorageDirectory(), "Pic.jpg");

    You don’t need to do anything more. You should be able to use it directly without saving in the activity result callback.

    You can improve your intent launch code with a timestamp for the image.

    SimpleDateFormat dateFormat = new SimpleDateFormat("yyyyMMdd-HHmmss");
String fileName = dateFormat.format(new Date()) + ".jpg";

// or use timestamp e.g String fileName = System.currentTimeMillis()+".jpg";

File photo = new File(Environment.getExternalStorageDirectory(), fileName);

Intent cameraintent = new Intent("android.media.action.IMAGE_CAPTURE");
cameraintent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(photo));
startActivityForResult(cameraintent, 1);
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