Android(安卓)几种图像特效处理的集锦

第一步:新建一个Android工程命名为ImageDemo,工程结构如下:

第二步.java文件ImageUtil.java,在里面定义一些图片处理方法<span color:#333333;"="" style="font-size: 10.5pt; ">,代码如下:

001 packagecom.android.tutor;

002 importandroid.graphics.Bitmap;

003 importandroid.graphics.Canvas;

004 importandroid.graphics.LinearGradient;

005 importandroid.graphics.Matrix;

006 importandroid.graphics.Paint;

007 importandroid.graphics.PixelFormat;

008 importandroid.graphics.PorterDuffXfermode;

009 importandroid.graphics.Rect;

010 importandroid.graphics.RectF;

011 importandroid.graphics.Bitmap.Config;

012 importandroid.graphics.PorterDuff.Mode;

013 importandroid.graphics.Shader.TileMode;

014 importandroid.graphics.drawable.Drawable;

015 publicclassImageUtil {

016

017 //放大缩小图片

018 publicstaticBitmap zoomBitmap(Bitmap bitmap,intw,inth){

019 intwidth = bitmap.getWidth();

020 intheight = bitmap.getHeight();

021 Matrix matrix = newMatrix();

022 floatscaleWidht = ((float)w / width);

023 floatscaleHeight = ((float)h / height);

024 matrix.postScale(scaleWidht, scaleHeight);

025 Bitmap newbmp = Bitmap.createBitmap(bitmap, 0, 0, width, height, matrix, true);

026 returnnewbmp;

027 }

028 //将Drawable转化为Bitmap

029 publicstaticBitmap drawableToBitmap(Drawable drawable){

030 intwidth = drawable.getIntrinsicWidth();

031 intheight = drawable.getIntrinsicHeight();

032 Bitmap bitmap = Bitmap.createBitmap(width, height,

033 drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888

034 : Bitmap.Config.RGB_565);

035 Canvas canvas = newCanvas(bitmap);

036 drawable.setBounds(0,0,width,height);

037 drawable.draw(canvas);

038 returnbitmap;

039

040 }

041

042 //获得圆角图片的方法

043 publicstaticBitmap getRoundedCornerBitmap(Bitmap bitmap,floatroundPx){

044

045 Bitmap output = Bitmap.createBitmap(bitmap.getWidth(), bitmap

046 .getHeight(), Config.ARGB_8888);

047 Canvas canvas = newCanvas(output);

048

049 finalintcolor = 0xff424242;

050 finalPaint paint = newPaint();

051 finalRect rect = newRect(0, 0, bitmap.getWidth(), bitmap.getHeight());

052 finalRectF rectF = newRectF(rect);

053

054 paint.setAntiAlias(true);

055 canvas.drawARGB(0, 0, 0, 0);

056 paint.setColor(color);

057 canvas.drawRoundRect(rectF, roundPx, roundPx, paint);

058

059 paint.setXfermode(newPorterDuffXfermode(Mode.SRC_IN));

060 canvas.drawBitmap(bitmap, rect, rect, paint);

061

062 returnoutput;

063 }

064 //获得带倒影的图片方法

065 publicstaticBitmap createReflectionImageWithOrigin(Bitmap bitmap){

066 finalintreflectionGap = 4;

067 intwidth = bitmap.getWidth();

068 intheight = bitmap.getHeight();

069

070 Matrix matrix = newMatrix();

071 matrix.preScale(1, -1);

072

073 Bitmap reflectionImage = Bitmap.createBitmap(bitmap,

074 0, height/2, width, height/2, matrix, false);

075

076 Bitmap bitmapWithReflection = Bitmap.createBitmap(width, (height + height/2), Config.ARGB_8888);

077

078 Canvas canvas = newCanvas(bitmapWithReflection);

079 canvas.drawBitmap(bitmap, 0, 0, null);

080 Paint deafalutPaint = newPaint();

081 canvas.drawRect(0, height,width,height + reflectionGap,

082 deafalutPaint);

083

084 canvas.drawBitmap(reflectionImage, 0, height + reflectionGap, null);

085

086 Paint paint = newPaint();

087 LinearGradient shader = newLinearGradient(0,

088 bitmap.getHeight(), 0, bitmapWithReflection.getHeight()

089 + reflectionGap, 0x70ffffff, 0x00ffffff, TileMode.CLAMP);

090 paint.setShader(shader);

091 // Set the Transfer mode to be porter duff and destination in

092 paint.setXfermode(newPorterDuffXfermode(Mode.DST_IN));

093 // Draw a rectangle using the paint with our linear gradient

094 canvas.drawRect(0, height, width, bitmapWithReflection.getHeight()

095 + reflectionGap, paint);

096

097 returnbitmapWithReflection;

098 }

099

100 }

第三步:修改main.xml布局文件,主要放了两个ImageView控件,代码如下:

`1`	`<!--?xml version="1.0" encoding="utf-8"?-->`

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