Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
//License from project: Open Source License 

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;
        }

        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);

            // Create a Bitmap with the flip matrix applied to it.
            // We only want the bottom half of the image
            Bitmap reflectionImage = Bitmap.createBitmap(bitmap, 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),
                    Bitmap.Config.ARGB_8888);

            // Create a new Canvas with the bitmap that's big enough for
            // the image plus gap plus reflection
            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);
            // Create a shader that is a linear gradient that covers the
            // reflection
            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);
            // Set the Transfer mode to be porter duff and destination in
            paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_IN));
            // Draw a rectangle using the paint with our linear gradient
            canvas.drawRect(0, height, width, bitmapWithReflection.getHeight() + reflectionGap, paint);

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