to Reflection Bitmap - Android Graphics

Android examples for Graphics:Bitmap Reflection

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Description

to Reflection Bitmap

Demo Code


//package com.java2s;

import android.graphics.Bitmap;

import android.graphics.Canvas;
import android.graphics.LinearGradient;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.PorterDuff;
import android.graphics.PorterDuffXfermode;

import android.graphics.Shader;

public class Main {

    public static Bitmap toReflectionBitmap(Bitmap bitmap) {
        if (bitmap == null) {
            return null;
        }//w  w  w  . ja v  a  2  s. c  om

        try {
            int reflectionGap = 1;
            int width = bitmap.getWidth();
            int height = bitmap.getHeight();

            // This will not scale but will flip on the Y axis
            Matrix matrix = new Matrix();
            matrix.preScale(1, -1);

            Bitmap reflectionImage = Bitmap.createBitmap(bitmap, 0,
                    height / 2, width, height / 2, matrix, false);


            Bitmap bitmapWithReflection = Bitmap.createBitmap(width,
                    (height + height / 2), Bitmap.Config.ARGB_8888);

            Canvas canvas = new Canvas(bitmapWithReflection);
            // Draw in the original image
            canvas.drawBitmap(bitmap, 0, 0, null);
            // Draw in the gap
            Paint deafaultPaint = new Paint();
            canvas.drawRect(0, height, width, height + reflectionGap,
                    deafaultPaint);
            // Draw in the reflection
            canvas.drawBitmap(reflectionImage, 0, height + reflectionGap,
                    null);

            Paint paint = new Paint();
            LinearGradient shader = new LinearGradient(0,
                    bitmap.getHeight(), 0, bitmapWithReflection.getHeight()
                            + reflectionGap, 0x70ffffff, 0x00ffffff,
                    Shader.TileMode.CLAMP);
            // Set the paint to use this shader (linear gradient)
            paint.setShader(shader);

            paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_IN));

            canvas.drawRect(0, height, width,
                    bitmapWithReflection.getHeight() + reflectionGap, paint);

            bitmap = bitmapWithReflection;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return bitmap;
    }
}

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