CODEWITHSUNDEEP
android
adnan
adnan

Reputation: 13

changing the pixel color of imageview

i have to change the color of just one pixel of an selected image from gallery i used a button to change this pixel but always the application has forced to stop when i clicked the button plz help me to solve this problem :( this is my button code

public void btnClick2 (View v){
     bmp.setPixel(30,30,0xFF000000 );
}

and this is onactivityresult code 

protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// TODO Auto-generated method stub
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == SELECTED_PICTURE && resultCode == RESULT_OK && null != data)
{
    Uri selectedImage = data.getData();
    String[] filePathColumn = { MediaStore.Images.Media.DATA };

    Cursor cursor = getContentResolver().query(selectedImage,
            filePathColumn, null, null, null);
    cursor.moveToFirst();

    int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
    String picturePath = cursor.getString(columnIndex);
    cursor.close();


  bmp = BitmapFactory.decodeFile(picturePath);



  iv1.setImageBitmap(bmp);


}

}

Upvotes: 1

Views: 1171

Answers (1)

Blackbelt
Blackbelt

Reputation: 157447

it does force close because BitmapFactory.decodeFile returns an immutable Bitmap, while setPixel works only on mutable bitmaps. You can use Bitmap.copy to get a mutable version of the original bitmap.

Edit:

Bitmap tmpBmp = BitmapFactory.decodeFile(picturePath);
bmp = tmpBmp.copy(Bitmap.Config.ARGB_8888 ,true);

Upvotes: 1

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