Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * Copyright (C) 2013 Roy Wang
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.LinearGradient;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.PorterDuffXfermode;
import android.graphics.Shader.TileMode;

public class Main {
    public static Bitmap createReflectedBitmap(Bitmap srcBitmap, float reflectHeight) {
        if (null == srcBitmap) {
            return null;
        }

        int srcWidth = srcBitmap.getWidth();
        int srcHeight = srcBitmap.getHeight();
        int reflectionWidth = srcBitmap.getWidth();
        int reflectionHeight = reflectHeight == 0 ? srcHeight / 3 : (int) (reflectHeight * srcHeight);

        if (0 == srcWidth || srcHeight == 0) {
            return null;
        }

        // The matrix
        Matrix matrix = new Matrix();
        matrix.preScale(1, -1);

        try {
            // The reflection bitmap, width is same with original's
            Bitmap reflectionBitmap = Bitmap.createBitmap(srcBitmap, 0, srcHeight - reflectionHeight,
                    reflectionWidth, reflectionHeight, matrix, false);

            if (null == reflectionBitmap) {
                return null;
            }

            Canvas canvas = new Canvas(reflectionBitmap);

            Paint paint = new Paint();
            paint.setAntiAlias(true);

            LinearGradient shader = new LinearGradient(0, 0, 0, reflectionBitmap.getHeight(), 0x70FFFFFF,
                    0x00FFFFFF, TileMode.MIRROR);
            paint.setShader(shader);

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

            // Draw the linear shader.
            canvas.drawRect(0, 0, reflectionBitmap.getWidth(), reflectionBitmap.getHeight(), paint);

            return reflectionBitmap;
        } catch (Exception e) {
            e.printStackTrace();
        }

        return null;
    }
}