It is not a good coding practice to scale a image by specifying its height and width in pixels because on different screen sizes i.e HDPI,LDPI,MDPI etc .Hence ,it is recommended to scale a image according to the screen dimensions in the following way.
The following function is used for scaling bitmap which is a part of android.graphics.Bitmap
Bitmap.createScaledBitmap(Bitmap_image, width, height,true);
STEPS:
1.Create a image view object and associate it with its corresponding ImageView in xml file.
ImageView _imgBitmap;
_imgBitmap = (ImageView) findViewById(R.id.set_image_id);
2.Get the screen dimensions in the following way and use them to scale the bitmap.
/* code for scaling bitmap using screen dimensions to suit all screen sizes*/
/* DisplayMetrics A structure describing general information about a display, such as its size, density, and font scaling. */
DisplayMetrics displaymetrics = new DisplayMetrics();
//getting display data
getWindowManager().getDefaultDisplay().getMetrics(displaymetrics);
int height = displaymetrics.heightPixels;//screen height in pixels
int width = displaymetrics.widthPixels;//screen width in pixels
float w= (float) (width/(3.5));//scaling w.r.t screen dimensions
float h= (float)(height/(4.4));
int w1=(int)w;//casting float values to int as the createScaledBitmap takes int args
int h1=(int)h;
Bitmap scaledBmap = Bitmap.createScaledBitmap(PlayMenuActivity.photo, w1, h1,true);
/*displaying captured pic*/
if (PlayMenuActivity.photo != null) {
_imgBitmap.setImageBitmap(scaledBmap);
}
This code will help you scale image for all screen sizes.
