Java tutorial
//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; import android.graphics.PorterDuffXfermode; import android.graphics.Rect; import android.graphics.RectF; public class Main { public static Bitmap getRoundedCornerBitmap(Context context, Bitmap input, int dips, int w, int h, boolean squareTL, boolean squareTR, boolean squareBL, boolean squareBR) { Bitmap output = Bitmap.createBitmap(w, h, Config.ARGB_8888); Canvas canvas = new Canvas(output); final float densityMultiplier = context.getResources().getDisplayMetrics().density; final int color = 0xff424242; final Paint paint = new Paint(); final Rect rect = new Rect(0, 0, w, h); final RectF rectF = new RectF(rect); //make sure that our rounded corner is scaled appropriately final float roundPx = dips * densityMultiplier; paint.setAntiAlias(true); canvas.drawARGB(0, 0, 0, 0); paint.setColor(color); canvas.drawRoundRect(rectF, roundPx, roundPx, paint); //draw rectangles over the corners we want to be square if (squareTL) { canvas.drawRect(0, 0, w / 2, h / 2, paint); } if (squareTR) { canvas.drawRect(w / 2, 0, w, h / 2, paint); } if (squareBL) { canvas.drawRect(0, h / 2, w / 2, h, paint); } if (squareBR) { canvas.drawRect(w / 2, h / 2, w, h, paint); } paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN)); canvas.drawBitmap(input, 0, 0, paint); return output; } }