CODEWITHSUNDEEP
androidbitmaprotation
bukanamay
bukanamay

Reputation: 575

get width and height of bitmap when rotate bitmap android?

i'm learning how to rotate bitmap in android, but i have problem when get width and height of bitmap.. how to fix it ?

this my code;

// Decode with inSampleSize
            BitmapFactory.Options o2 = new BitmapFactory.Options();
            o2.inSampleSize = scale;
            bitmap = BitmapFactory.decodeFile(filePath, o2);

            int width = bitmap.getWidth();
            int height = bitmap.getHeight();

            if(degree!=0){



        Matrix matrix = new Matrix();
            matrix.postRotate(degree);
            bitmap = Bitmap.createBitmap(bitmap, 0, 0, width, height, matrix, true);

        }

i get error at int width = bitmap.getWidth(); int height = bitmap.getHeight();

this my logcat

 10-25 11:02:51.689: W/dalvikvm(22013): threadid=1: thread exiting with uncaught exception (group=0x40bd7438)
10-25 11:02:51.699: E/AndroidRuntime(22013): FATAL EXCEPTION: main
10-25 11:02:51.699: E/AndroidRuntime(22013): java.lang.NullPointerException
10-25 11:02:51.699: E/AndroidRuntime(22013):    at com.mozaik.tangsel.uploadimage.UploadActivity.decodeFile(UploadActivity.java:580)
10-25 11:02:51.699: E/AndroidRuntime(22013):    at com.mozaik.tangsel.uploadimage.UploadActivity$5.onClick(UploadActivity.java:216)
10-25 11:02:51.699: E/AndroidRuntime(22013):    at android.view.View.performClick(View.java:4084)
10-25 11:02:51.699: E/AndroidRuntime(22013):    at android.view.View$PerformClick.run(View.java:16987)
10-25 11:02:51.699: E/AndroidRuntime(22013):    at android.os.Handler.handleCallback(Handler.java:615)
10-25 11:02:51.699: E/AndroidRuntime(22013):    at android.os.Handler.dispatchMessage(Handler.java:92)
10-25 11:02:51.699: E/AndroidRuntime(22013):    at android.os.Looper.loop(Looper.java:137)
10-25 11:02:51.699: E/AndroidRuntime(22013):    at android.app.ActivityThread.main(ActivityThread.java:4794)
10-25 11:02:51.699: E/AndroidRuntime(22013):    at java.lang.reflect.Method.invokeNative(Native Method)
10-25 11:02:51.699: E/AndroidRuntime(22013):    at java.lang.reflect.Method.invoke(Method.java:511)
10-25 11:02:51.699: E/AndroidRuntime(22013):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789)
10-25 11:02:51.699: E/AndroidRuntime(22013):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:556)
10-25 11:02:51.699: E/AndroidRuntime(22013):    at dalvik.system.NativeStart.main(Native Method)

thanks, sorry for my english

Upvotes: 0

Views: 2340

Answers (2)

Amulya Khare
Amulya Khare

Reputation: 7708

The problem is that your filePath does not point to a correct file. That is, there is no image at filePath. Check the value of filePath is correct and this should get resolved.

Upvotes: 1

JRowan
JRowan

Reputation: 7114

i think you have to set your options inJustDecodeBounds before you can set insamplesize 

BitmapFactory.Options options = new BitmapFactory.Options();
                options.inJustDecodeBounds = true;
                BitmapFactory.decodeFile(selectedImagePath, options);
                int imageHeight = options.outHeight;
                int imageWidth = options.outWidth;
                String imageType = options.outMimeType;
                if(imageWidth > imageHeight){
                    options.inSampleSize = calculateInSampleSize(options,512,256);//<------the size you need if landscape
                }else{
                    options.inSampleSize = calculateInSampleSize(options,256,512);//<------the size you need if portrait
                }
                options.inJustDecodeBounds = false;
                bitmap = BitmapFactory.decodeFile(selectedImagePath,options);

Upvotes: 1

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