android 处理图片工具

packagecom.wireme.activity;

importjava.io.ByteArrayOutputStream;
importjava.io.File;
importjava.io.FileNotFoundException;
importjava.io.FileOutputStream;
importjava.io.IOException;

importandroid.graphics.Bitmap;
importandroid.graphics.BitmapFactory;
importandroid.graphics.Canvas;
importandroid.graphics.ColorMatrix;
importandroid.graphics.ColorMatrixColorFilter;
importandroid.graphics.Paint;
importandroid.graphics.PorterDuffXfermode;
importandroid.graphics.Rect;
importandroid.graphics.RectF;
importandroid.graphics.Bitmap.Config;
importandroid.graphics.PorterDuff.Mode;
importandroid.graphics.drawable.BitmapDrawable;
importandroid.graphics.drawable.Drawable;

/* *
*处理图片的工具类.
*/
public classimageTool{
public staticfinal intLEFT= 0;
public staticfinal intRIGHT= 1;
public staticfinal intTOP= 3;
public staticfinal intBOTTOM= 4;

/* * */
/* *
*图片去色,返回灰度图片
*
*@parambmpOriginal
*传入的图片
*@return去色后的图片
*/
public staticBitmaptoGrayscale(BitmapbmpOriginal){
intwidth,height;
height=bmpOriginal.getHeight();
width=bmpOriginal.getWidth();
BitmapbmpGrayscale=Bitmap.createBitmap(width,height,
Bitmap.Config.RGB_565);
Canvasc= newCanvas(bmpGrayscale);
Paintpaint= newPaint();
ColorMatrixcm= newColorMatrix();
cm.setSaturation( 0);
ColorMatrixColorFilterf= newColorMatrixColorFilter(cm);
paint.setColorFilter(f);
c.drawBitmap(bmpOriginal, 0, 0,paint);
returnbmpGrayscale;
}

/* * */
/* *
*去色同时加圆角
*
*@parambmpOriginal
*原图
*@parampixels
*圆角弧度
*@return修改后的图片
*/
public staticBitmaptoGrayscale(BitmapbmpOriginal, intpixels){
returntoRoundCorner(toGrayscale(bmpOriginal),pixels);
}

/* * */
/* *
*把图片变成圆角
*
*@parambitmap
*需要修改的图片
*@parampixels
*圆角的弧度
*@return圆角图片
*/
public staticBitmaptoRoundCorner(Bitmapbitmap, intpixels){
Bitmapoutput=Bitmap.createBitmap(bitmap.getWidth(),bitmap
.getHeight(),Config.ARGB_8888);
Canvascanvas= newCanvas(output);
final intcolor= 0xff424242;
finalPaintpaint= newPaint();
finalRectrect= newRect( 0, 0,bitmap.getWidth(),bitmap.getHeight());
finalRectFrectF= newRectF(rect);
final floatroundPx=pixels;
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;
}

/* * */
/* *
*使圆角功能支持BitampDrawable
*
*@parambitmapDrawable
*@parampixels
*@return
*/
public staticBitmapDrawabletoRoundCorner(BitmapDrawablebitmapDrawable,
intpixels){
Bitmapbitmap=bitmapDrawable.getBitmap();
bitmapDrawable= newBitmapDrawable(toRoundCorner(bitmap,pixels));
returnbitmapDrawable;
}

/* *
*读取路径中的图片，然后将其转化为缩放后的bitmap
*
*@parampath
*/
public static voidsaveBefore(Stringpath){
BitmapFactory.Optionsoptions= newBitmapFactory.Options();
options.inJustDecodeBounds= true;
// 获取这个图片的宽和高
Bitmapbitmap=BitmapFactory.decodeFile(path,options); // 此时返回bm为空
options.inJustDecodeBounds= false;
// 计算缩放比
intbe=( int)(options.outHeight/( float) 200);
if(be<= 0)
be= 1;
options.inSampleSize= 2; // 图片长宽各缩小二分之一
// 重新读入图片，注意这次要把options.inJustDecodeBounds设为false哦
bitmap=BitmapFactory.decodeFile(path,options);
intw=bitmap.getWidth();
inth=bitmap.getHeight();
System. out.println(w+ " "+h);
// savePNG_After(bitmap,path);
saveJPGE_After(bitmap,path);
}

/* *
*保存图片为PNG
*
*@parambitmap
*@paramname
*/
public static voidsavePNG_After(Bitmapbitmap,Stringname){
Filefile= newFile(name);
try{
FileOutputStream out= newFileOutputStream(file);
if(bitmap.compress(Bitmap.CompressFormat.PNG, 100, out)){
out.flush();
out.close();
}
} catch(FileNotFoundExceptione){
e.printStackTrace();
} catch(IOExceptione){
e.printStackTrace();
}
}

/* *
*保存图片为JPEG
*
*@parambitmap
*@parampath
*/
public static voidsaveJPGE_After(Bitmapbitmap,Stringpath){
Filefile= newFile(path);
try{
FileOutputStream out= newFileOutputStream(file);
if(bitmap.compress(Bitmap.CompressFormat.JPEG, 100, out)){
out.flush();
out.close();
}
} catch(FileNotFoundExceptione){
e.printStackTrace();
} catch(IOExceptione){
e.printStackTrace();
}
}

/* *
*水印
*
*@parambitmap
*@return
*/
public staticBitmapcreateBitmapForWatermark(Bitmapsrc,Bitmapwatermark){
if(src== null){
return null;
}
intw=src.getWidth();
inth=src.getHeight();
intww=watermark.getWidth();
intwh=watermark.getHeight();
// createthenewblankbitmap
Bitmapnewb=Bitmap.createBitmap(w,h,Config.ARGB_8888); // 创建一个新的和SRC长度宽度一样的位图
Canvascv= newCanvas(newb);
// drawsrcinto
cv.drawBitmap(src, 0, 0, null); // 在0，0坐标开始画入src
// drawwatermarkinto
cv.drawBitmap(watermark,w-ww+ 5,h-wh+ 5, null); // 在src的右下角画入水印
// saveallclip
cv.save(Canvas.ALL_SAVE_FLAG); // 保存
// store
cv.restore(); // 存储
returnnewb;
}

/* *
*图片合成
*
*@return
*/
public staticBitmappotoMix( intdirection,Bitmap...bitmaps){
if(bitmaps.length<= 0){
return null;
}
if(bitmaps.length== 1){
returnbitmaps[ 0];
}
BitmapnewBitmap=bitmaps[ 0];
// newBitmap=createBitmapForFotoMix(bitmaps[0],bitmaps[1],direction);
for( inti= 1;i<bitmaps.length;i++){
newBitmap=createBitmapForFotoMix(newBitmap,bitmaps[i],direction);
}
returnnewBitmap;
}

private staticBitmapcreateBitmapForFotoMix(Bitmapfirst,Bitmapsecond,
intdirection){
if(first== null){
return null;
}
if(second== null){
returnfirst;
}
intfw=first.getWidth();
intfh=first.getHeight();
intsw=second.getWidth();
intsh=second.getHeight();
BitmapnewBitmap= null;
if(direction==LEFT){
newBitmap=Bitmap.createBitmap(fw+sw,fh>sh?fh:sh,
Config.ARGB_8888);
Canvascanvas= newCanvas(newBitmap);
canvas.drawBitmap(first,sw, 0, null);
canvas.drawBitmap(second, 0, 0, null);
} else if(direction==RIGHT){
newBitmap=Bitmap.createBitmap(fw+sw,fh>sh?fh:sh,
Config.ARGB_8888);
Canvascanvas= newCanvas(newBitmap);
canvas.drawBitmap(first, 0, 0, null);
canvas.drawBitmap(second,fw, 0, null);
} else if(direction==TOP){
newBitmap=Bitmap.createBitmap(sw>fw?sw:fw,fh+sh,
Config.ARGB_8888);
Canvascanvas= newCanvas(newBitmap);
canvas.drawBitmap(first, 0,sh, null);
canvas.drawBitmap(second, 0, 0, null);
} else if(direction==BOTTOM){
newBitmap=Bitmap.createBitmap(sw>fw?sw:fw,fh+sh,
Config.ARGB_8888);
Canvascanvas= newCanvas(newBitmap);
canvas.drawBitmap(first, 0, 0, null);
canvas.drawBitmap(second, 0,fh, null);
}
returnnewBitmap;
}

/* *
*将Bitmap转换成指定大小
*
*@parambitmap
*@paramwidth
*@paramheight
*@return
*/
public staticBitmapcreateBitmapBySize(Bitmapbitmap, intwidth, intheight){
returnBitmap.createScaledBitmap(bitmap,width,height, true);
}

/* *
*Drawable转Bitmap
*
*@paramdrawable
*@return
*/
public staticBitmapdrawableToBitmapByBD(Drawabledrawable){
BitmapDrawablebitmapDrawable=(BitmapDrawable)drawable;
returnbitmapDrawable.getBitmap();
}

/* *
*Bitmap转Drawable
*
*@parambitmap
*@return
*/
public staticDrawablebitmapToDrawableByBD(Bitmapbitmap){
Drawabledrawable= newBitmapDrawable(bitmap);
returndrawable;
}

/* *
*byte[]转bitmap
*
*@paramb
*@return
*/
public staticBitmapbytesToBimap( byte[]b){
if(b.length!= 0){
returnBitmapFactory.decodeByteArray(b, 0,b.length);
} else{
return null;
}
}

/* *
*bitmap转byte[]
*
*@parambm
*@return
*/
public static byte[]bitmapToBytes(Bitmapbm){
ByteArrayOutputStreambaos= newByteArrayOutputStream();
bm.compress(Bitmap.CompressFormat.PNG, 100,baos);
returnbaos.toByteArray();
}
}

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