Android中圖片的特效處理

Android --- 圖片處理的方法

轉換 -  drawable To  bitmap

縮放 -  Zoom

圓角 -  Round Corner

倒影 -  Reflected

bitmapPrcess  code:

package com.learn.games;     
         
import android.graphics.Bitmap;     
import android.graphics.Canvas;     
import android.graphics.LinearGradient;     
import android.graphics.Matrix;     
import android.graphics.Paint;     
import android.graphics.PixelFormat;     
import android.graphics.PorterDuffXfermode;     
import android.graphics.Rect;     
import android.graphics.RectF;     
import android.graphics.Bitmap.Config;     
import android.graphics.PorterDuff.Mode;     
import android.graphics.Shader.TileMode;     
import android.graphics.drawable.Drawable;     

public class bitmapProcess {     

    // zoom     
    public static Bitmap zoomBitmap(Bitmap bitmap, int w, int h){     
        int width = bitmap.getWidth();     
        int height = bitmap.getHeight();     
        Matrix matrix = new Matrix();     
                 
        float scaleWidth = w/(float)width;     
        float scaleHeight = h/(float)height;     
        matrix.postScale(scaleWidth, scaleHeight);     
                 
        Bitmap bitmap2 = Bitmap.createBitmap(bitmap, 0, 0, width, height, matrix, true);     
        return bitmap2;          
    }     
             
             
    // drawable to bitmap     
    public static Bitmap drawable2Bitmap(Drawable drawable){     
        int width = drawable.getIntrinsicHeight();     
        int height = drawable.getIntrinsicHeight();     
                 
        Bitmap bitmap = Bitmap.createBitmap(width, height, drawable.getOpacity()      
                != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888 : Bitmap.Config.RGB_565);     
                 
        Canvas canvas = new Canvas(bitmap);     
        drawable.setBounds(0, 0, width, height);     
        drawable.draw(canvas);     
                 
        return bitmap;     
    }     
             
             
    // Round Corner Bitmap     
    public static Bitmap getRoundCornerBitmap(Bitmap bitmap, float roundPX){     
        int width = bitmap.getWidth();     
        int height = bitmap.getHeight();     
                 
        Bitmap bitmap2 = Bitmap.createBitmap(width, height, Config.ARGB_8888);     
        Canvas canvas = new Canvas(bitmap2);     
                 
        final int color = 0xff424242;     
        final Paint paint = new Paint();     
        final Rect rect = new Rect(0, 0, width, height);     
        final RectF rectF = new RectF(rect);     
         
        paint.setColor(color);     
        paint.setAntiAlias(true);     
        canvas.drawARGB(0, 0, 0, 0);     
        canvas.drawRoundRect(rectF, roundPX, roundPX, paint);     
                 
        paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));     
        canvas.drawBitmap(bitmap, rect, rect, paint);     
                 
        return bitmap2;     
    }     
             
    // Reflect Bitmap     
    public static Bitmap createReflectedBitmap(Bitmap bitmap){     
        final int reflectedGap = 4;     
        int width = bitmap.getWidth();     
        int height = bitmap.getHeight();     
                 
        Matrix matrix = new Matrix();     
        matrix.preScale(1, -1);     
                 
        Bitmap reflectedImage = Bitmap.createBitmap(bitmap, 0, height/2, width, height/2, matrix, false);     
        Bitmap reflectedBitmap = Bitmap.createBitmap(width, (height + height/2), Config.ARGB_8888);     
                 
        Canvas canvas = new Canvas(reflectedBitmap);     
        canvas.drawBitmap(bitmap, 0, 0, null);     
        Paint defaultPaint = new Paint();     
        canvas.drawRect(0, height, width, height + reflectedGap, defaultPaint);     
        canvas.drawBitmap(reflectedImage, 0, height + reflectedGap, null);     
                 
        Paint paint = new Paint();     
        LinearGradient shader = new LinearGradient(0, bitmap.getHeight(), 0,     
                                reflectedBitmap.getHeight() + reflectedGap, 0x70ffffff, 0x00ffffff, TileMode.CLAMP);     
        paint.setShader(shader);     
        paint.setXfermode(new PorterDuffXfermode(Mode.DST_IN));     
        canvas.drawRect(0, height, width, reflectedBitmap.getHeight() + reflectedGap, paint);     
                 
        return reflectedBitmap;     
    }     
             
}