Created
July 19, 2016 15:32
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import android.content.Context; | |
import android.content.res.Resources; | |
import android.graphics.Bitmap; | |
import android.graphics.BitmapFactory; | |
import android.graphics.Canvas; | |
import android.graphics.Color; | |
import android.graphics.LightingColorFilter; | |
import android.graphics.drawable.BitmapDrawable; | |
import android.graphics.drawable.Drawable; | |
import android.graphics.drawable.LayerDrawable; | |
public class BitmapUtils { | |
public static Bitmap applyOverlay(Context context, Bitmap sourceImage, int overlayDrawableResourceId){ | |
Bitmap bitmap = null; | |
try{ | |
int width = sourceImage.getWidth(); | |
int height = sourceImage.getHeight(); | |
Resources r = context.getResources(); | |
Drawable imageAsDrawable = new BitmapDrawable(r, sourceImage); | |
Drawable[] layers = new Drawable[2]; | |
layers[0] = imageAsDrawable; | |
layers[1] = new BitmapDrawable(r, BitmapUtils.decodeSampledBitmapFromResource(r, overlayDrawableResourceId, width, height)); | |
LayerDrawable layerDrawable = new LayerDrawable(layers); | |
bitmap = BitmapUtils.drawableToBitmap(layerDrawable); | |
}catch (Exception ex){} | |
return bitmap; | |
} | |
public static Bitmap decodeSampledBitmapFromResource(Resources res, int resId, | |
int reqWidth, int reqHeight) { | |
// First decode with inJustDecodeBounds=true to check dimensions | |
final BitmapFactory.Options options = new BitmapFactory.Options(); | |
options.inJustDecodeBounds = true; | |
BitmapFactory.decodeResource(res, resId, options); | |
// Calculate inSampleSize | |
options.inSampleSize = calculateInSampleSize(options, reqWidth, reqHeight); | |
// Decode bitmap with inSampleSize set | |
options.inJustDecodeBounds = false; | |
return BitmapFactory.decodeResource(res, resId, options); | |
} | |
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) { | |
final int halfHeight = height / 2; | |
final int halfWidth = width / 2; | |
// Calculate the largest inSampleSize value that is a power of 2 and keeps both | |
// height and width larger than the requested height and width. | |
while ((halfHeight / inSampleSize) >= reqHeight | |
&& (halfWidth / inSampleSize) >= reqWidth) { | |
inSampleSize *= 2; | |
} | |
} | |
return inSampleSize; | |
} | |
public static Bitmap drawableToBitmap (Drawable drawable) { | |
Bitmap bitmap = null; | |
if (drawable instanceof BitmapDrawable) { | |
BitmapDrawable bitmapDrawable = (BitmapDrawable) drawable; | |
if(bitmapDrawable.getBitmap() != null) { | |
return bitmapDrawable.getBitmap(); | |
} | |
} | |
if(drawable.getIntrinsicWidth() <= 0 || drawable.getIntrinsicHeight() <= 0) { | |
bitmap = Bitmap.createBitmap(1, 1, Bitmap.Config.ARGB_8888); // Single color bitmap will be created of 1x1 pixel | |
} else { | |
bitmap = Bitmap.createBitmap(drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight(), Bitmap.Config.ARGB_8888); | |
} | |
Canvas canvas = new Canvas(bitmap); | |
drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight()); | |
drawable.draw(canvas); | |
return bitmap; | |
} | |
} |
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Very good thanks!