Add Reflection to Bitmap - Android android.graphics

Android examples for android.graphics:Bitmap Operation

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  3. android.graphics
  4. Bitmap Operation

Description

Add Reflection to Bitmap

Demo Code

import android.graphics.Bitmap;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.LinearGradient;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.PixelFormat;
import android.graphics.PorterDuff;
import android.graphics.PorterDuffXfermode;
import android.graphics.Rect;
import android.graphics.RectF;
import android.graphics.Shader;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.ColorDrawable;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.TransitionDrawable;
import android.lemon.assist.Base64;
import android.lemon.dct.FDCT;
import android.view.View;
import android.view.View;
import android.widget.ImageView;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.net.URLConnection;

public class Main{

    public static Bitmap toReflectionBitmap(Bitmap bitmap) {
        if (bitmap == null) {
            return null;
        }/*from   w  ww.j  a  v a2 s  .co  m*/

        try {
            int reflectionGap = 1;
            int width = bitmap.getWidth();
            int height = bitmap.getHeight();
            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), Config.ARGB_8888);

            Canvas canvas = new Canvas(bitmapWithReflection);
  
            canvas.drawBitmap(bitmap, 0, 0, null);
       
            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,
                    TileMode.CLAMP);
            paint.setShader(shader);
            paint.setXfermode(new PorterDuffXfermode(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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