Created
October 31, 2012 15:24
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Android BitmapHelper
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import java.io.InputStream; | |
import android.graphics.Bitmap; | |
import android.graphics.BitmapFactory; | |
public class BitmapHelper { | |
public static int calculateInSampleSize(BitmapFactory.Options options,int reqWidth, int reqHeight) { | |
// Raw height and width of image | |
final int height = options.outHeight; | |
final int width = options.outWidth; | |
int inSampleSize = 1; | |
if (height > reqHeight || width > reqWidth) { | |
if (width > height) { | |
inSampleSize = Math.round((float) height / (float) reqHeight); | |
} else { | |
inSampleSize = Math.round((float) width / (float) reqWidth); | |
} | |
} | |
return inSampleSize; | |
} | |
public static Bitmap decodeSampledBitmapFromInputStream(InputStream is ,int reqWidth, int reqHeight) { | |
// First decode with inJustDecodeBounds=true to check dimensions | |
final BitmapFactory.Options options = new BitmapFactory.Options(); | |
options.inJustDecodeBounds = true; | |
BitmapFactory.decodeStream(is, null, options); | |
// Calculate inSampleSize | |
options.inSampleSize = calculateInSampleSize(options, reqWidth, reqHeight); | |
// Decode bitmap with inSampleSize set | |
options.inJustDecodeBounds = false; | |
return BitmapFactory.decodeStream(is, null, options); | |
} | |
} |
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