Here you can find the source of getRoundedCornerBitmap(Bitmap bitmap, int dp, Context context)
public static Bitmap getRoundedCornerBitmap(Bitmap bitmap, int dp, Context context)
//package com.java2s; import android.content.Context; import android.graphics.Bitmap; import android.graphics.Bitmap.Config; import android.graphics.Canvas; import android.graphics.Paint; import android.graphics.PorterDuff.Mode; import android.graphics.PorterDuffXfermode; import android.graphics.Rect; import android.graphics.RectF; public class Main { public static Bitmap getRoundedCornerBitmap(Bitmap bitmap, int dp, Context context) {/* www .j a v a2 s.com*/ Bitmap output = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Config.ARGB_8888); Canvas canvas = new Canvas(output); final int color = 0xff424242; final Paint paint = new Paint(); final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight()); final RectF rectF = new RectF(rect); final float roundPx = getPixels(dp, context); paint.setAntiAlias(true); canvas.drawARGB(0, 0, 0, 0); paint.setColor(color); canvas.drawRoundRect(rectF, roundPx, roundPx, paint); paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN)); canvas.drawBitmap(bitmap, rect, rect, paint); return output; } public static int getPixels(int dp, Context context) { final float scale = context.getResources().getDisplayMetrics().density; int px = (int) (dp * scale + 0.5f); return px; } }