create Reflected Bitmap Image - Android Graphics

Android examples for Graphics:Bitmap Reflection

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Description

create Reflected Bitmap Image

Demo Code


//package com.java2s;
import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;
import android.graphics.Canvas;

import android.graphics.LinearGradient;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.PorterDuff.Mode;
import android.graphics.PorterDuffXfermode;
import android.graphics.Shader.TileMode;

public class Main {
    public static Bitmap createReflectedImage(Bitmap originalImage) {

        final int reflectionGap = 0;

        int width = originalImage.getWidth();
        int height = originalImage.getHeight();

        // This will not scale but will flip on the Y axis
        Matrix matrix = new Matrix();
        matrix.preScale(1, -1);//from www  .  j  a v  a  2s.co  m


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

        // Create a new bitmap with same width but taller to fit reflection
        Bitmap bitmapWithReflection = Bitmap.createBitmap(width,
                (height + height / 2), Config.ARGB_8888);


        Canvas canvas = new Canvas(bitmapWithReflection);

        canvas.drawBitmap(originalImage, 0, 0, null);
        // Draw in the gap
        Paint defaultPaint = new Paint();
        canvas.drawRect(0, height, width, height + reflectionGap,
                defaultPaint);
        // Draw in the reflection
        canvas.drawBitmap(reflectionImage, 0, height + reflectionGap, null);


        Paint paint = new Paint();
        LinearGradient shader = new LinearGradient(0,
                originalImage.getHeight(), 0,
                bitmapWithReflection.getHeight() + reflectionGap,
                0x70ffffff, 0x00ffffff, TileMode.CLAMP);

        paint.setShader(shader);

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

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

        return bitmapWithReflection;
    }
}

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