Android中几种图像特效处理方法小结Word文档格式.docx

Android中几种图像特效处理方法小结Word文档格式.docx

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importandroid.graphics.Canvas;

importandroid.graphics.LinearGradient;

importandroid.graphics.Matrix;

importandroid.graphics.Paint;

importandroid.graphics.PixelFormat;

importandroid.graphics.PorterDuffXfermode;

importandroid.graphics.Rect;

importandroid.graphics.RectF;

importandroid.graphics.Bitmap.Config;

importandroid.graphics.PorterDuff.Mode;

importandroid.graphics.Shader.TileMode;

importandroid.graphics.drawable.Drawable;

publicclassImageUtil{

//放大缩小图片

publicstaticBitmapzoomBitmap（Bitmapbitmap,intw,inth）{

intwidth=bitmap.getWidth（）;

intheight=bitmap.getHeight（）;

Matrixmatrix=newMatrix（）;

floatscaleWidht=（（float）w/width）;

floatscaleHeight=（（float）h/height）;

matrix.postScale（scaleWidht,scaleHeight）;

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

returnnewbmp;

}

//将Drawable转化为Bitmap

publicstaticBitmapdrawableToBitmap（Drawabledrawable）{

intwidth=drawable.getIntrinsicWidth（）;

intheight=drawable.getIntrinsicHeight（）;

Bitmapbitmap=Bitmap.createBitmap（width,height,

drawable.getOpacity（）!

=PixelFormat.OPAQUE?

Bitmap.Config.ARGB_8888

:

Bitmap.Config.RGB_565）;

Canvascanvas=newCanvas（bitmap）;

drawable.setBounds（0,0,width,height）;

drawable.draw（canvas）;

returnbitmap;

//获得圆角图片的方法

publicstaticBitmapgetRoundedCornerBitmap（Bitmapbitmap,floatroundPx）{

Bitmapoutput=Bitmap.createBitmap（bitmap.getWidth（）,bitmap

.getHeight（）,Config.ARGB_8888）;

Canvascanvas=newCanvas（output）;

finalintcolor=0xff424242;

finalPaintpaint=newPaint（）;

finalRectrect=newRect（0,0,bitmap.getWidth（）,bitmap.getHeight（））;

finalRectFrectF=newRectF（rect）;

paint.setAntiAlias（true）;

canvas.drawARGB（0,0,0,0）;

paint.setColor（color）;

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

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

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

returnoutput;

//获得带倒影的图片方法

publicstaticBitmapcreateReflectionImageWithOrigin（Bitmapbitmap）{

finalintreflectionGap=4;

matrix.preScale（1,-1）;

BitmapreflectionImage=Bitmap.createBitmap（bitmap,

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

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

Canvascanvas=newCanvas（bitmapWithReflection）;

canvas.drawBitmap（bitmap,0,0,null）;

PaintdeafalutPaint=newPaint（）;

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

deafalutPaint）;

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

Paintpaint=newPaint（）;

LinearGradientshader=newLinearGradient（0,

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

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

paint.setShader（shader）;

//SettheTransfermodetobeporterduffanddestinationin

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

//Drawarectangleusingthepaintwithourlineargradient

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

+reflectionGap,paint）;

returnbitmapWithReflection;

packagecom.android.tutor;

importandroid.graphics.Bitmap;

importandroid.graphics.Canvas;

importandroid.graphics.LinearGradient;

importandroid.graphics.Matrix;

importandroid.graphics.Paint;

importandroid.graphics.PixelFormat;

importandroid.graphics.PorterDuffXfermode;

importandroid.graphics.Rect;

importandroid.graphics.RectF;

importandroid.graphics.Bitmap.Config;

importandroid.graphics.PorterDuff.Mode;

importandroid.graphics.Shader.TileMode;

importandroid.graphics.drawable.Drawable;

publicclassImageUtil{

Canvascanvas=newCanvas（bi