Android 图片处理工具类汇总
很有用的Android图片处理工具，实现各种图片处理效果
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/*******图片加载与保存*******/
/** * 以最省内存的方式读取本地资源的图片 * * @param context * @param resId * @return */ public Bitmap readBitMap( int resId) { BitmapFactory.Options opt = new BitmapFactory.Options(); opt.inPreferredConfig = Bitmap.Config.RGB_565; opt.inPurgeable = true; opt.inInputShareable = true; // 获取资源图片 InputStream is = getResources().openRawResource(resId); return BitmapFactory.decodeStream(is, null, opt); } /** * 节省内存 * * @Description: * @param filePath * @param outWidth * @param outHeight * @return */ public static Bitmap readBitmapAutoSize( String filePath, int outWidth, int outHeight) { // outWidth和outHeight是目标图片的最大宽度和高度，用作限制 FileInputStream fs = null; BufferedInputStream bs = null; try { fs = new FileInputStream(filePath); bs = new BufferedInputStream(fs); BitmapFactory.Options options = setBitmapOption(filePath, outWidth, outHeight); return BitmapFactory.decodeStream(bs, null, options); } catch (Exception e) { e.printStackTrace(); } finally { try { bs.close(); fs.close(); } catch (Exception e) { e.printStackTrace(); } } return null; } //保存图片到本地路径 public boolean saveBitmap(Bitmap bitmap, String fileName, String path) { File file = new File(path); FileOutputStream fos = null; if (!file.exists()) { file.mkdir(); } File imageFile = new File(file, fileName); try { imageFile.createNewFile(); fos = new FileOutputStream(imageFile); bitmap.compress(CompressFormat.JPEG, 50, fos); fos.flush(); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } finally { if(fos != null) { try { fos.close(); } catch (IOException e) { e.printStackTrace(); } fos = null; } } return true; } // 从view得到bitmap public Bitmap getViewBitmap(View view) { Bitmap bitmap = null; try { int width = view.getWidth(); int height = view.getHeight(); if (width != 0 && height != 0) { bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888); Canvas canvas = new Canvas(bitmap); view.draw(canvas); } } catch (Exception e) { bitmap = null; Debug.out(e); } return bitmap; } /** * @Title: getLoacalBitmap * @Description: 加载本地图片 * @param @param url 本地路径 * @param @return * @return Bitmap * @throws */ public Bitmap getLoacalBitmap( String url) { if (url != null) { FileInputStream fis = null; try { fis = new FileInputStream(url); return BitmapFactory.decodeStream(fis); // /把流转化为Bitmap图片 } catch (FileNotFoundException e) { e.printStackTrace(); return null; } finally { StreamService.close(fis); if(fis != null) { try { fis.close(); } catch (IOException e) { e.printStackTrace(); } fis = null; } } } else { return null; } } /** * 通过URL地址获取Bitmap对象 * * @Title: getBitMapByUrl * @param @param url * @param @return * @param @throws Exception * @return Bitmap * @throws */ public Bitmap getBitMapByUrl( final String url) { URL fileUrl = null; InputStream is = null; Bitmap bitmap = null; try { fileUrl = new URL(url); HttpURLConnection conn = (HttpURLConnection) fileUrl.openConnection(); conn.setDoInput(true); conn.connect(); is = conn.getInputStream(); bitmap = BitmapFactory.decodeStream(is); } catch (Exception e) { e.printStackTrace(); } finally { try { if (null != is) { is.close(); } } catch (IOException e) { e.printStackTrace(); } is = null; } return bitmap; } /*******获取图片信息*******/ /** * @brief 从文件载入只获边框的，从返回的Options.outWidth和Options.outHight里取出即可 * @see android.graphics.BitmapFactory.Options#inJustDecodeBounds */ public Options loadJustDecodeBounds( String path) { Options opts = new Options(); opts.inJustDecodeBounds = true; loadFromFile(path, opts); return opts; } /** * @brief 读取图片方向信息 * @param path 图片路径 * @return 角度 */ public int readPhotoDegree( String path) { int degree = 0; try { ExifInterface exifInterface = new ExifInterface(path); int orientation = exifInterface.getAttributeInt(ExifInterface.TAG_ORIENTATION, ExifInterface.ORIENTATION_NORMAL); switch (orientation) { case ExifInterface.ORIENTATION_ROTATE_90: degree = 90; break; case ExifInterface.ORIENTATION_ROTATE_180: degree = 180; break; case ExifInterface.ORIENTATION_ROTATE_270: degree = 270; break; default: degree = 0; } } catch (IOException e) { e.printStackTrace(); } return degree; } /*******图片转换*******/ public static Bitmap drawableToBitmap(Drawable drawable) { Bitmap bitmap = Bitmap.createBitmap(drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight(), drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888 : Bitmap.Config.RGB_565); Canvas canvas = new Canvas(bitmap); //canvas.setBitmap(bitmap); drawable.setBounds( 0, 0, drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight()); drawable.draw(canvas); return bitmap; } private byte[] Bitmap2Bytes(Bitmap bm) { ByteArrayOutputStream baos = new ByteArrayOutputStream(); bm.compress(Bitmap.CompressFormat.PNG, 100, baos); return baos.toByteArray(); } private Bitmap Bytes2Bimap( byte[] b) { if(b.length != 0) { return BitmapFactory.decodeByteArray(b, 0, b.length); } else { return null; } } //Stream转换成Byte static byte[] streamToBytes(InputStream is) { ByteArrayOutputStream os = new ByteArrayOutputStream( 1024); byte[] buffer = new byte[ 1024]; int len; try { while ((len = is.read(buffer)) >= 0) { os.write(buffer, 0, len); } } catch (java.io.IOException e) { } return os.toByteArray(); } /** Bitmap 格式转换 * * @param src * 需要重新编码的Bitmap * * @param format * 编码后的格式（目前只支持png和jpeg这两种格式） * * @param quality * 重新生成后的bitmap的质量 * * @return * 返回重新生成后的bitmap */ private static Bitmap codec(Bitmap src, Bitmap.CompressFormat format, int quality) { ByteArrayOutputStream os = new ByteArrayOutputStream(); src.compress(format, quality, os); byte[] array = os.toByteArray(); return BitmapFactory.decodeByteArray(array, 0, array.length); } /*******图片缩放剪裁和形变*******/ /** * 放大缩小图片，不保证宽高比 * * @Title: zoomBitmap * @param @param bitmap * @param @param w * @param @param h * @return Bitmap * @throws */ public Bitmap zoomBitmap(Bitmap bitmap, int w, int h) { int width = bitmap.getWidth(); int height = bitmap.getHeight(); Matrix matrix = new Matrix(); float scaleWidht = (( float) w / width); float scaleHeight = (( float) h / height); matrix.postScale(scaleWidht, scaleHeight); Bitmap newbmp = Bitmap.createBitmap(bitmap, 0, 0, width, height, matrix, true); bitmap.recycle(); bitmap = null; return newbmp; } /** * @brief 缩放Bitmap * @param src 源Bitmap * @param dstWidth 目标宽度 * @param dstHeight 目标高度 * @param isRecycle 是否回收原图像 * @return Bitmap */ public Bitmap scaleBitmap(Bitmap src, int dstWidth, int dstHeight, boolean isRecycle) { if (src.getWidth() == dstWidth && src.getHeight() == dstHeight) { return src; } Bitmap dst = Bitmap.createScaledBitmap(src, dstWidth, dstHeight, false); if (isRecycle && dst != src) { src.recycle(); } return dst; } //放大缩小图片，生成缩略图 public Bitmap extractThumbnail(Bitmap src, int width, int height) { return ThumbnailUtils.extractThumbnail(src, width, height, ThumbnailUtils.OPTIONS_RECYCLE_INPUT); } /** * @brief 裁剪Bitmap * @param src 源Bitmap * @param x 开始x坐标 * @param y 开始y坐标 * @param width 截取宽度 * @param height 截取高度 * @param isRecycle 是否回收原图像 * @return Bitmap */ public Bitmap cropBitmap(Bitmap src, int x, int y, int width, int height, boolean isRecycle) { if (x == 0 && y == 0 && width == src.getWidth() && height == src.getHeight()) { return src; } Bitmap dst = Bitmap.createBitmap(src, x, y, width, height); if (isRecycle && dst != src) { src.recycle(); } return dst; } /*** * 图片分割 * * @param g * ：画布 * @param paint * ：画笔 * @param imgBit * ：图片 * @param x * ：X轴起点坐标 * @param y * ：Y轴起点坐标 * @param w * ：单一图片的宽度 * @param h * ：单一图片的高度 * @param line * ：第几列 * @param row * ：第几行 */ public final void cuteImage(Canvas g, Paint paint, Bitmap imgBit, int x, int y, int w, int h, int line, int row) { g.clipRect(x, y, x + w, h + y); g.drawBitmap(imgBit, x – line * w, y – row * h, paint); g.restore(); } //将一个图片切割成多个图片 //传入的参数是要切割的Bitmap对象，和横向和竖向的切割片数 public class ImageSplitter { public static List List int width = bitmap.getWidth(); int height = bitmap.getHeight(); int pieceWidth = width / 3; int pieceHeight = height / 3; for ( int i = 0; i < yPiece; i++) { for ( int j = 0; j < xPiece; j++) { ImagePiece piece = new ImagePiece(); piece.index = j + i * xPiece; int xValue = j * pieceWidth; int yValue = i * pieceHeight; piece.bitmap = Bitmap.createBitmap(bitmap, xValue, yValue, pieceWidth, pieceHeight); pieces.add(piece); } } return pieces; } } //图片翻转 Resources res = this.getContext().getResources(); img = BitmapFactory.decodeResource(res, R.drawable.slogo); Matrix matrix = new Matrix(); matrix.postRotate( 90); /*翻转90度*/ int width = img.getWidth(); int height = img.getHeight(); r_img = Bitmap.createBitmap(img, 0, 0, width, height, matrix, true); /** * @brief 旋转Bitmap，顺时针 * @param src 源Bitmap * @param degree 旋转角度 * @param isRecycle 是否回收原图像 * @return Bitmap */ public Bitmap rotateBitmap(Bitmap src, int degree, boolean isRecycle) { if (degree % 360 == 0) { return src; } int w = src.getWidth(); int h = src.getHeight(); Matrix matrix = new Matrix(); matrix.postRotate(degree); Bitmap dst = Bitmap.createBitmap(src, 0, 0, w, h, matrix, true); if (isRecycle && dst != src) { src.recycle(); } return dst; } /*******图片效果处理*******/ /** * 图片透明度处理 * * @param sourceImg * 原始图片 * @param number * 透明度 * @return */ public static Bitmap setAlpha(Bitmap sourceImg, int number) { int[] argb = new int[sourceImg.getWidth() * sourceImg.getHeight()]; sourceImg.getPixels(argb, 0, sourceImg.getWidth(), 0, 0, sourceImg.getWidth(), sourceImg.getHeight()); // 获得图片的ARGB值 number = number * 255 / 100; for ( int i = 0; i < argb.length; i++) { argb[i] = (number << 24) | (argb & 0×00FFFFFF); // [/i][i]修改最高2[/i][i]位的值 } sourceImg = Bitmap.createBitmap(argb, sourceImg.getWidth(), sourceImg.getHeight(), Config.ARGB_8888); return sourceImg; } public class ImgService { //亮 public final float[] LIGHT_ARR = new float[] { 1, 0, 0, 0, 100, 0, 1, 0, 0, 100, 0, 0, 1, 0, 100, 0, 0, 0, 1, 0 }; //暗 public final float[] DARK_ARR = new float[] { 0.2f, 0, 0, 0, 50.8f, 0, 0.2f, 0, 0, 50.8f, 0, 0, 0.2f, 0, 50.8f, 0, 0, 0, 1f, 0 }; //高对比 public final float[] GDB_ARR = new float[] { 5, 0, 0, 0, - 250, 0, 5, 0, 0, - 250, 0, 0, 5, 0, - 250, 0, 0, 0, 1, 0 }; //高对比 public final float[] DDB_ARR = new float[] { 0.2f, 0, 0, 0, 50, 0, 0.2f, 0, 0, 50, 0, 0, 0.2f, 0, 50, 0, 0, 0, 1, 0 }; //高饱和 public final float[] GBH_ARR = new float[] { 3f, - 1.8f, - 0.25f, 0, 50, - 0.9f, 2.1f, - 0.25f, 0, 50, - 0.9f, - 1.8f, 3.8f, 0, 50, 0, 0, 0, 1, 0 }; //低饱和 public final float[] DBH_ARR = new float[] { 0.3f, 0.6f, 0.08f, 0, 0, 0.3f, 0.6f, 0.08f, 0, 0, 0.3f, 0.6f, 0.08f, 0, 0, 0, 0, 0, 1, 0 }; //COPY public final float[] COPY_ARR = new float[] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; } /** * 为图片加滤镜特效.array参数为ImgService定义的几个滤镜矩阵.如ImgService.LIGHT_ARR * @param bmpOriginal * @param array * @return */ public Bitmap toGrayscale(Bitmap bmpOriginal, float[] array) { int width, height; height = bmpOriginal.getHeight(); width = bmpOriginal.getWidth(); Bitmap bmpGrayscale = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565); Canvas c = new Canvas(bmpGrayscale); Paint paint = new Paint(); ColorMatrix colorMatrix = new ColorMatrix(); colorMatrix.set(array); paint.setColorFilter( new ColorMatrixColorFilter(colorMatrix)); c.drawBitmap(bmpOriginal, 0, 0, paint); bmpOriginal.recycle(); bmpOriginal = null; return bmpGrayscale; } // Bitmap加水印 public Bitmap addWatermark(Bitmap src, Bitmap watermark) { if (src == null || watermark == null) { return src; } int sWid = src.getWidth(); int sHei = src.getHeight(); int wWid = watermark.getWidth(); int wHei = watermark.getHeight(); if (sWid == 0 || sHei == 0) { return null; } if (sWid < wWid || sHei < wHei) { return src; } Bitmap bitmap = Bitmap.createBitmap(sWid, sHei, Config.ARGB_8888); //Config可修改,改变内存占用 try { Canvas cv = new Canvas(bitmap); cv.drawBitmap(src, 0, 0, null); cv.drawBitmap(watermark, sWid - wWid - 5, sHei - wHei - 5, null); cv.save(Canvas.ALL_SAVE_FLAG); cv.restore(); } catch (Exception e) { bitmap = null; e.getStackTrace(); } finally { src.recycle(); src = null; watermark.recycle(); watermark = null; } return bitmap; } /** * 获得圆角图片 * * @Description: * @param bitmap * @param roundPx * @return */ public static Bitmap getRoundedCornerBitmap(Bitmap bitmap) { int w = bitmap.getWidth(); int h = bitmap.getHeight(); Bitmap output = Bitmap.createBitmap(w, h, Config.ARGB_8888); Canvas canvas = new Canvas(output); final int color = 0xff424242; final Paint paint = new Paint(); final Rect rect = new Rect( 0, 0, w, h); final RectF rectF = new RectF(rect); paint.setAntiAlias(true); canvas.drawARGB( 0, 0, 0, 0); paint.setColor(color); canvas.drawRoundRect(rectF, 10, 10, paint); // 圆角平滑度为10 paint.setXfermode( new PorterDuffXfermode(Mode.SRC_IN)); canvas.drawBitmap(bitmap, rect, rect, paint); return output; } /*** * 绘制带有边框的文字 * * @param strMsg * ：绘制内容 * @param g * ：画布 * @param paint * ：画笔 * @param setx * ：：X轴起始坐标 * @param sety * ：Y轴的起始坐标 * @param fg * ：前景色 * @param bg * ：背景色 */ public void drawText( String strMsg, Canvas g, Paint paint, int setx, int sety, int fg, int bg) { paint.setColor(bg); g.drawText(strMsg, setx + 1, sety, paint); g.drawText(strMsg, setx, sety – 1, paint); g.drawText(strMsg, setx, sety + 1, paint); g.drawText(strMsg, setx – 1, sety, paint); paint.setColor(fg); g.drawText(strMsg, setx, sety, paint); g.restore(); } //获得带倒影的图片方法 public static Bitmap createReflectionImageWithOrigin(Bitmap bitmap) { final int reflectionGap = 4; 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 deafalutPaint = new Paint(); canvas.drawRect( 0, height, width, height + reflectionGap, deafalutPaint); canvas.drawBitmap(reflectionImage, 0, height + reflectionGap, null); Paint paint = new Paint(); LinearGradient shader = new LinearGradient( 0, bitmap.getHeight(), 0, bitmapWithReflection.getHeight() + reflectionGap, 0x70ffffff, 0x00ffffff, TileMode.CLAMP); paint.setShader(shader); // Set the Transfer mode to be porter duff and destination in paint.setXfermode( new PorterDuffXfermode(Mode.DST_IN)); // Draw a rectangle using the paint with our linear gradient canvas.drawRect( 0, height, width, bitmapWithReflection.getHeight() + reflectionGap, paint); return bitmapWithReflection; } //Android Matrix类实现镜像倒影方法 public void drawRegion(Image image_src, int x_src, int y_src, int width, int height, int transform, int x_dest, int y_dest, int anchor) { if((anchor & VCENTER) != 0) { y_dest -= height / 2; } else if((anchor & BOTTOM) != 0) { y_dest -= height; } if((anchor & RIGHT) != 0) { x_dest -= width; } else if((anchor & HCENTER) != 0) { x_dest -= width / 2; } Bitmap newMap = Bitmap.createBitmap(image_src.getBitmap(), x_src, y_src, width, height); Matrix mMatrix = new Matrix(); Matrix temp = new Matrix(); Matrix temp2 = new Matrix(); float[] mirrorY = { - 1, 0, 0, 0, 1, 0, 0, 0, 1 }; temp.setValues(mirrorY); switch(transform) { case Sprite.TRANS_NONE: break; case Sprite.TRANS_ROT90: mMatrix.setRotate( 90, width / 2, height / 2); break; case Sprite.TRANS_ROT180: mMatrix.setRotate( 180, width / 2, height / 2); break; case Sprite.TRANS_ROT270: mMatrix.setRotate( 270, width / 2, height / 2); break; case Sprite.TRANS_MIRROR: mMatrix.postConcat(temp); break; case Sprite.TRANS_MIRROR_ROT90: mMatrix.postConcat(temp); mMatrix.setRotate( 90, width / 2, height / 2); break; case Sprite.TRANS_MIRROR_ROT180: mMatrix.postConcat(temp); mMatrix.setRotate( 180, width / 2, height / 2); break; case Sprite.TRANS_MIRROR_ROT270: mMatrix.postConcat(temp); mMatrix.setRotate( 270, width / 2, height / 2); break; } mMatrix.setTranslate(x_dest, y_dest); canvas.drawBitmap(newMap, mMatrix, mPaint); } /** * 将彩色图转换为灰度图 * @param img 位图 * @return 返回转换好的位图 */ public Bitmap convertGreyImg(Bitmap img) { int width = img.getWidth(); //获取位图的宽 int height = img.getHeight(); //获取位图的高 int []pixels = new int[width * height]; //通过位图的大小创建像素点数组 img.getPixels(pixels, 0, width, 0, 0, width, height); int alpha = 0xFF << 24; for( int i = 0; i < height; i++) { for( int j = 0; j < width; j++) { int grey = pixels[width * i + j]; int red = ((grey & 0x00FF0000 ) >> 16); int green = ((grey & 0x0000FF00) >> 8); int blue = (grey & 0x000000FF); grey = ( int)(( float) red * 0. 3 + ( float)green * 0. 59 + ( float)blue * 0. 11); grey = alpha | (grey << 16) | (grey << 8) | grey; pixels[width * i + j] = grey; } } Bitmap result = Bitmap.createBitmap(width, height, Config.RGB_565); result.setPixels(pixels, 0, width, 0, 0, width, height); return result; } //压缩图片大小 public static Bitmap compressImage(Bitmap image) { ByteArrayOutputStream baos = new ByteArrayOutputStream(); image.compress(Bitmap.CompressFormat.JPEG, 100, baos); //质量压缩方法，这里100表示不压缩，把压缩后的数据存放到baos中 int options = 100; while ( baos.toByteArray().length / 1024 > 100) { //循环判断如果压缩后图片是否大于100kb,大于继续压缩 baos.reset(); //重置baos即清空baos image.compress(Bitmap.CompressFormat.JPEG, options, baos); //这里压缩options%，把压缩后的数据存放到baos中 options -= 10; //每次都减少10 } ByteArrayInputStream isBm = new ByteArrayInputStream(baos.toByteArray()); //把压缩后的数据baos存放到ByteArrayInputStream中 Bitmap bitmap = BitmapFactory.decodeStream(isBm, null, null); //把ByteArrayInputStream数据生成图片 return bitmap; } //同一张图片在两个不同的地方用到，但是两处的效果不一样。 //调用mutate()方法，可以使Drawable对象生成不同的constantstate对象，修改时就不会影响其它drawable对象的状态 //例如：通讯软件里不同用户，用同一个头像，一个要亮的，代表在线，一个要变灰，代表离线 Drawable mDrawable = context.getResources().getDrawable(R.drawable.face_icon); //Make this drawable mutable. //A mutable drawable is guaranteed to not share its state with any other drawable. mDrawable.mutate(); ColorMatrix cm = new ColorMatrix(); cm.setSaturation( 0); ColorMatrixColorFilter cf = new ColorMatrixColorFilter(cm); mDrawable.setColorFilter(cf); |
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/*******图片加载与保存*******/
/** * 以最省内存的方式读取本地资源的图片 * * @param context * @param resId * @return */ public Bitmap readBitMap( int resId) { BitmapFactory.Options opt = new BitmapFactory.Options(); opt.inPreferredConfig = Bitmap.Config.RGB_565; opt.inPurgeable = true; opt.inInputShareable = true; // 获取资源图片 InputStream is = getResources().openRawResource(resId); return BitmapFactory.decodeStream(is, null, opt); } /** * 节省内存 * * @Description: * @param filePath * @param outWidth * @param outHeight * @return */ public static Bitmap readBitmapAutoSize( String filePath, int outWidth, int outHeight) { // outWidth和outHeight是目标图片的最大宽度和高度，用作限制 FileInputStream fs = null; BufferedInputStream bs = null; try { fs = new FileInputStream(filePath); bs = new BufferedInputStream(fs); BitmapFactory.Options options = setBitmapOption(filePath, outWidth, outHeight); return BitmapFactory.decodeStream(bs, null, options); } catch (Exception e) { e.printStackTrace(); } finally { try { bs.close(); fs.close(); } catch (Exception e) { e.printStackTrace(); } } return null; } //保存图片到本地路径 public boolean saveBitmap(Bitmap bitmap, String fileName, String path) { File file = new File(path); FileOutputStream fos = null; if (!file.exists()) { file.mkdir(); } File imageFile = new File(file, fileName); try { imageFile.createNewFile(); fos = new FileOutputStream(imageFile); bitmap.compress(CompressFormat.JPEG, 50, fos); fos.flush(); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } finally { if(fos != null) { try { fos.close(); } catch (IOException e) { e.printStackTrace(); } fos = null; } } return true; } // 从view得到bitmap public Bitmap getViewBitmap(View view) { Bitmap bitmap = null; try { int width = view.getWidth(); int height = view.getHeight(); if (width != 0 && height != 0) { bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888); Canvas canvas = new Canvas(bitmap); view.draw(canvas); } } catch (Exception e) { bitmap = null; Debug.out(e); } return bitmap; } /** * @Title: getLoacalBitmap * @Description: 加载本地图片 * @param @param url 本地路径 * @param @return * @return Bitmap * @throws */ public Bitmap getLoacalBitmap( String url) { if (url != null) { FileInputStream fis = null; try { fis = new FileInputStream(url); return BitmapFactory.decodeStream(fis); // /把流转化为Bitmap图片 } catch (FileNotFoundException e) { e.printStackTrace(); return null; } finally { StreamService.close(fis); if(fis != null) { try { fis.close(); } catch (IOException e) { e.printStackTrace(); } fis = null; } } } else { return null; } } /** * 通过URL地址获取Bitmap对象 * * @Title: getBitMapByUrl * @param @param url * @param @return * @param @throws Exception * @return Bitmap * @throws */ public Bitmap getBitMapByUrl( final String url) { URL fileUrl = null; InputStream is = null; Bitmap bitmap = null; try { fileUrl = new URL(url); HttpURLConnection conn = (HttpURLConnection) fileUrl.openConnection(); conn.setDoInput(true); conn.connect(); is = conn.getInputStream(); bitmap = BitmapFactory.decodeStream(is); } catch (Exception e) { e.printStackTrace(); } finally { try { if (null != is) { is.close(); } } catch (IOException e) { e.printStackTrace(); } is = null; } return bitmap; } /*******获取图片信息*******/ /** * @brief 从文件载入只获边框的，从返回的Options.outWidth和Options.outHight里取出即可 * @see android.graphics.BitmapFactory.Options#inJustDecodeBounds */ public Options loadJustDecodeBounds( String path) { Options opts = new Options(); opts.inJustDecodeBounds = true; loadFromFile(path, opts); return opts; } /** * @brief 读取图片方向信息 * @param path 图片路径 * @return 角度 */ public int readPhotoDegree( String path) { int degree = 0; try { ExifInterface exifInterface = new ExifInterface(path); int orientation = exifInterface.getAttributeInt(ExifInterface.TAG_ORIENTATION, ExifInterface.ORIENTATION_NORMAL); switch (orientation) { case ExifInterface.ORIENTATION_ROTATE_90: degree = 90; break; case ExifInterface.ORIENTATION_ROTATE_180: degree = 180; break; case ExifInterface.ORIENTATION_ROTATE_270: degree = 270; break; default: degree = 0; } } catch (IOException e) { e.printStackTrace(); } return degree; } /*******图片转换*******/ public static Bitmap drawableToBitmap(Drawable drawable) { Bitmap bitmap = Bitmap.createBitmap(drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight(), drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888 : Bitmap.Config.RGB_565); Canvas canvas = new Canvas(bitmap); //canvas.setBitmap(bitmap); drawable.setBounds( 0, 0, drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight()); drawable.draw(canvas); return bitmap; } private byte[] Bitmap2Bytes(Bitmap bm) { ByteArrayOutputStream baos = new ByteArrayOutputStream(); bm.compress(Bitmap.CompressFormat.PNG, 100, baos); return baos.toByteArray(); } private Bitmap Bytes2Bimap( byte[] b) { if(b.length != 0) { return BitmapFactory.decodeByteArray(b, 0, b.length); } else { return null; } } //Stream转换成Byte static byte[] streamToBytes(InputStream is) { ByteArrayOutputStream os = new ByteArrayOutputStream( 1024); byte[] buffer = new byte[ 1024]; int len; try { while ((len = is.read(buffer)) >= 0) { os.write(buffer, 0, len); } } catch (java.io.IOException e) { } return os.toByteArray(); } /** Bitmap 格式转换 * * @param src * 需要重新编码的Bitmap * * @param format * 编码后的格式（目前只支持png和jpeg这两种格式） * * @param quality * 重新生成后的bitmap的质量 * * @return * 返回重新生成后的bitmap */ private static Bitmap codec(Bitmap src, Bitmap.CompressFormat format, int quality) { ByteArrayOutputStream os = new ByteArrayOutputStream(); src.compress(format, quality, os); byte[] array = os.toByteArray(); return BitmapFactory.decodeByteArray(array, 0, array.length); } /*******图片缩放剪裁和形变*******/ /** * 放大缩小图片，不保证宽高比 * * @Title: zoomBitmap * @param @param bitmap * @param @param w * @param @param h * @return Bitmap * @throws */ public Bitmap zoomBitmap(Bitmap bitmap, int w, int h) { int width = bitmap.getWidth(); int height = bitmap.getHeight(); Matrix matrix = new Matrix(); float scaleWidht = (( float) w / width); float scaleHeight = (( float) h / height); matrix.postScale(scaleWidht, scaleHeight); Bitmap newbmp = Bitmap.createBitmap(bitmap, 0, 0, width, height, matrix, true); bitmap.recycle(); bitmap = null; return newbmp; } /** * @brief 缩放Bitmap * @param src 源Bitmap * @param dstWidth 目标宽度 * @param dstHeight 目标高度 * @param isRecycle 是否回收原图像 * @return Bitmap */ public Bitmap scaleBitmap(Bitmap src, int dstWidth, int dstHeight, boolean isRecycle) { if (src.getWidth() == dstWidth && src.getHeight() == dstHeight) { return src; } Bitmap dst = Bitmap.createScaledBitmap(src, dstWidth, dstHeight, false); if (isRecycle && dst != src) { src.recycle(); } return dst; } //放大缩小图片，生成缩略图 public Bitmap extractThumbnail(Bitmap src, int width, int height) { return ThumbnailUtils.extractThumbnail(src, width, height, ThumbnailUtils.OPTIONS_RECYCLE_INPUT); } /** * @brief 裁剪Bitmap * @param src 源Bitmap * @param x 开始x坐标 * @param y 开始y坐标 * @param width 截取宽度 * @param height 截取高度 * @param isRecycle 是否回收原图像 * @return Bitmap */ public Bitmap cropBitmap(Bitmap src, int x, int y, int width, int height, boolean isRecycle) { if (x == 0 && y == 0 && width == src.getWidth() && height == src.getHeight()) { return src; } Bitmap dst = Bitmap.createBitmap(src, x, y, width, height); if (isRecycle && dst != src) { src.recycle(); } return dst; } /*** * 图片分割 * * @param g * ：画布 * @param paint * ：画笔 * @param imgBit * ：图片 * @param x * ：X轴起点坐标 * @param y * ：Y轴起点坐标 * @param w * ：单一图片的宽度 * @param h * ：单一图片的高度 * @param line * ：第几列 * @param row * ：第几行 */ public final void cuteImage(Canvas g, Paint paint, Bitmap imgBit, int x, int y, int w, int h, int line, int row) { g.clipRect(x, y, x + w, h + y); g.drawBitmap(imgBit, x – line * w, y – row * h, paint); g.restore(); } //将一个图片切割成多个图片 //传入的参数是要切割的Bitmap对象，和横向和竖向的切割片数 public class ImageSplitter { public static List List int width = bitmap.getWidth(); int height = bitmap.getHeight(); int pieceWidth = width / 3; int pieceHeight = height / 3; for ( int i = 0; i < yPiece; i++) { for ( int j = 0; j < xPiece; j++) { ImagePiece piece = new ImagePiece(); piece.index = j + i * xPiece; int xValue = j * pieceWidth; int yValue = i * pieceHeight; piece.bitmap = Bitmap.createBitmap(bitmap, xValue, yValue, pieceWidth, pieceHeight); pieces.add(piece); } } return pieces; } } //图片翻转 Resources res = this.getContext().getResources(); img = BitmapFactory.decodeResource(res, R.drawable.slogo); Matrix matrix = new Matrix(); matrix.postRotate( 90); /*翻转90度*/ int width = img.getWidth(); int height = img.getHeight(); r_img = Bitmap.createBitmap(img, 0, 0, width, height, matrix, true); /** * @brief 旋转Bitmap，顺时针 * @param src 源Bitmap * @param degree 旋转角度 * @param isRecycle 是否回收原图像 * @return Bitmap */ public Bitmap rotateBitmap(Bitmap src, int degree, boolean isRecycle) { if (degree % 360 == 0) { return src; } int w = src.getWidth(); int h = src.getHeight(); Matrix matrix = new Matrix(); matrix.postRotate(degree); Bitmap dst = Bitmap.createBitmap(src, 0, 0, w, h, matrix, true); if (isRecycle && dst != src) { src.recycle(); } return dst; } /*******图片效果处理*******/ /** * 图片透明度处理 * * @param sourceImg * 原始图片 * @param number * 透明度 * @return */ public static Bitmap setAlpha(Bitmap sourceImg, int number) { int[] argb = new int[sourceImg.getWidth() * sourceImg.getHeight()]; sourceImg.getPixels(argb, 0, sourceImg.getWidth(), 0, 0, sourceImg.getWidth(), sourceImg.getHeight()); // 获得图片的ARGB值 number = number * 255 / 100; for ( int i = 0; i < argb.length; i++) { argb[i] = (number << 24) | (argb & 0×00FFFFFF); // [/i][i]修改最高2[/i][i]位的值 } sourceImg = Bitmap.createBitmap(argb, sourceImg.getWidth(), sourceImg.getHeight(), Config.ARGB_8888); return sourceImg; } public class ImgService { //亮 public final float[] LIGHT_ARR = new float[] { 1, 0, 0, 0, 100, 0, 1, 0, 0, 100, 0, 0, 1, 0, 100, 0, 0, 0, 1, 0 }; //暗 public final float[] DARK_ARR = new float[] { 0.2f, 0, 0, 0, 50.8f, 0, 0.2f, 0, 0, 50.8f, 0, 0, 0.2f, 0, 50.8f, 0, 0, 0, 1f, 0 }; //高对比 public final float[] GDB_ARR = new float[] { 5, 0, 0, 0, - 250, 0, 5, 0, 0, - 250, 0, 0, 5, 0, - 250, 0, 0, 0, 1, 0 }; //高对比 public final float[] DDB_ARR = new float[] { 0.2f, 0, 0, 0, 50, 0, 0.2f, 0, 0, 50, 0, 0, 0.2f, 0, 50, 0, 0, 0, 1, 0 }; //高饱和 public final float[] GBH_ARR = new float[] { 3f, - 1.8f, - 0.25f, 0, 50, - 0.9f, 2.1f, - 0.25f, 0, 50, - 0.9f, - 1.8f, 3.8f, 0, 50, 0, 0, 0, 1, 0 }; //低饱和 public final float[] DBH_ARR = new float[] { 0.3f, 0.6f, 0.08f, 0, 0, 0.3f, 0.6f, 0.08f, 0, 0, 0.3f, 0.6f, 0.08f, 0, 0, 0, 0, 0, 1, 0 }; //COPY public final float[] COPY_ARR = new float[] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; } /** * 为图片加滤镜特效.array参数为ImgService定义的几个滤镜矩阵.如ImgService.LIGHT_ARR * @param bmpOriginal * @param array * @return */ public Bitmap toGrayscale(Bitmap bmpOriginal, float[] array) { int width, height; height = bmpOriginal.getHeight(); width = bmpOriginal.getWidth(); Bitmap bmpGrayscale = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565); Canvas c = new Canvas(bmpGrayscale); Paint paint = new Paint(); ColorMatrix colorMatrix = new ColorMatrix(); colorMatrix.set(array); paint.setColorFilter( new ColorMatrixColorFilter(colorMatrix)); c.drawBitmap(bmpOriginal, 0, 0, paint); bmpOriginal.recycle(); bmpOriginal = null; return bmpGrayscale; } // Bitmap加水印 public Bitmap addWatermark(Bitmap src, Bitmap watermark) { if (src == null || watermark == null) { return src; } int sWid = src.getWidth(); int sHei = src.getHeight(); int wWid = watermark.getWidth(); int wHei = watermark.getHeight(); if (sWid == 0 || sHei == 0) { return null; } if (sWid < wWid || sHei < wHei) { return src; } Bitmap bitmap = Bitmap.createBitmap(sWid, sHei, Config.ARGB_8888); //Config可修改,改变内存占用 try { Canvas cv = new Canvas(bitmap); cv.drawBitmap(src, 0, 0, null); cv.drawBitmap(watermark, sWid - wWid - 5, sHei - wHei - 5, null); cv.save(Canvas.ALL_SAVE_FLAG); cv.restore(); } catch (Exception e) { bitmap = null; e.getStackTrace(); } finally { src.recycle(); src = null; watermark.recycle(); watermark = null; } return bitmap; } /** * 获得圆角图片 * * @Description: * @param bitmap * @param roundPx * @return */ public static Bitmap getRoundedCornerBitmap(Bitmap bitmap) { int w = bitmap.getWidth(); int h = bitmap.getHeight(); Bitmap output = Bitmap.createBitmap(w, h, Config.ARGB_8888); Canvas canvas = new Canvas(output); final int color = 0xff424242; final Paint paint = new Paint(); final Rect rect = new Rect( 0, 0, w, h); final RectF rectF = new RectF(rect); paint.setAntiAlias(true); canvas.drawARGB( 0, 0, 0, 0); paint.setColor(color); canvas.drawRoundRect(rectF, 10, 10, paint); // 圆角平滑度为10 paint.setXfermode( new PorterDuffXfermode(Mode.SRC_IN)); canvas.drawBitmap(bitmap, rect, rect, paint); return output; } /*** * 绘制带有边框的文字 * * @param strMsg * ：绘制内容 * @param g * ：画布 * @param paint * ：画笔 * @param setx * ：：X轴起始坐标 * @param sety * ：Y轴的起始坐标 * @param fg * ：前景色 * @param bg * ：背景色 */ public void drawText( String strMsg, Canvas g, Paint paint, int setx, int sety, int fg, int bg) { paint.setColor(bg); g.drawText(strMsg, setx + 1, sety, paint); g.drawText(strMsg, setx, sety – 1, paint); g.drawText(strMsg, setx, sety + 1, paint); g.drawText(strMsg, setx – 1, sety, paint); paint.setColor(fg); g.drawText(strMsg, setx, sety, paint); g.restore(); } //获得带倒影的图片方法 public static Bitmap createReflectionImageWithOrigin(Bitmap bitmap) { final int reflectionGap = 4; 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 deafalutPaint = new Paint(); canvas.drawRect( 0, height, width, height + reflectionGap, deafalutPaint); canvas.drawBitmap(reflectionImage, 0, height + reflectionGap, null); Paint paint = new Paint(); LinearGradient shader = new LinearGradient( 0, bitmap.getHeight(), 0, bitmapWithReflection.getHeight() + reflectionGap, 0x70ffffff, 0x00ffffff, TileMode.CLAMP); paint.setShader(shader); // Set the Transfer mode to be porter duff and destination in paint.setXfermode( new PorterDuffXfermode(Mode.DST_IN)); // Draw a rectangle using the paint with our linear gradient canvas.drawRect( 0, height, width, bitmapWithReflection.getHeight() + reflectionGap, paint); return bitmapWithReflection; } //Android Matrix类实现镜像倒影方法 public void drawRegion(Image image_src, int x_src, int y_src, int width, int height, int transform, int x_dest, int y_dest, int anchor) { if((anchor & VCENTER) != 0) { y_dest -= height / 2; } else if((anchor & BOTTOM) != 0) { y_dest -= height; } if((anchor & RIGHT) != 0) { x_dest -= width; } else if((anchor & HCENTER) != 0) { x_dest -= width / 2; } Bitmap newMap = Bitmap.createBitmap(image_src.getBitmap(), x_src, y_src, width, height); Matrix mMatrix = new Matrix(); Matrix temp = new Matrix(); Matrix temp2 = new Matrix(); float[] mirrorY = { - 1, 0, 0, 0, 1, 0, 0, 0, 1 }; temp.setValues(mirrorY); switch(transform) { case Sprite.TRANS_NONE: break; case Sprite.TRANS_ROT90: mMatrix.setRotate( 90, width / 2, height / 2); break; case Sprite.TRANS_ROT180: mMatrix.setRotate( 180, width / 2, height / 2); break; case Sprite.TRANS_ROT270: mMatrix.setRotate( 270, width / 2, height / 2); break; case Sprite.TRANS_MIRROR: mMatrix.postConcat(temp); break; case Sprite.TRANS_MIRROR_ROT90: mMatrix.postConcat(temp); mMatrix.setRotate( 90, width / 2, height / 2); break; case Sprite.TRANS_MIRROR_ROT180: mMatrix.postConcat(temp); mMatrix.setRotate( 180, width / 2, height / 2); break; case Sprite.TRANS_MIRROR_ROT270: mMatrix.postConcat(temp); mMatrix.setRotate( 270, width / 2, height / 2); break; } mMatrix.setTranslate(x_dest, y_dest); canvas.drawBitmap(newMap, mMatrix, mPaint); } /** * 将彩色图转换为灰度图 * @param img 位图 * @return 返回转换好的位图 */ public Bitmap convertGreyImg(Bitmap img) { int width = img.getWidth(); //获取位图的宽 int height = img.getHeight(); //获取位图的高 int []pixels = new int[width * height]; //通过位图的大小创建像素点数组 img.getPixels(pixels, 0, width, 0, 0, width, height); int alpha = 0xFF << 24; for( int i = 0; i < height; i++) { for( int j = 0; j < width; j++) { int grey = pixels[width * i + j]; int red = ((grey & 0x00FF0000 ) >> 16); int green = ((grey & 0x0000FF00) >> 8); int blue = (grey & 0x000000FF); grey = ( int)(( float) red * 0. 3 + ( float)green * 0. 59 + ( float)blue * 0. 11); grey = alpha | (grey << 16) | (grey << 8) | grey; pixels[width * i + j] = grey; } } Bitmap result = Bitmap.createBitmap(width, height, Config.RGB_565); result.setPixels(pixels, 0, width, 0, 0, width, height); return result; } //压缩图片大小 public static Bitmap compressImage(Bitmap image) { ByteArrayOutputStream baos = new ByteArrayOutputStream(); image.compress(Bitmap.CompressFormat.JPEG, 100, baos); //质量压缩方法，这里100表示不压缩，把压缩后的数据存放到baos中 int options = 100; while ( baos.toByteArray().length / 1024 > 100) { //循环判断如果压缩后图片是否大于100kb,大于继续压缩 baos.reset(); //重置baos即清空baos image.compress(Bitmap.CompressFormat.JPEG, options, baos); //这里压缩options%，把压缩后的数据存放到baos中 options -= 10; //每次都减少10 } ByteArrayInputStream isBm = new ByteArrayInputStream(baos.toByteArray()); //把压缩后的数据baos存放到ByteArrayInputStream中 Bitmap bitmap = BitmapFactory.decodeStream(isBm, null, null); //把ByteArrayInputStream数据生成图片 return bitmap; } //同一张图片在两个不同的地方用到，但是两处的效果不一样。 //调用mutate()方法，可以使Drawable对象生成不同的constantstate对象，修改时就不会影响其它drawable对象的状态 //例如：通讯软件里不同用户，用同一个头像，一个要亮的，代表在线，一个要变灰，代表离线 Drawable mDrawable = context.getResources().getDrawable(R.drawable.face_icon); //Make this drawable mutable. //A mutable drawable is guaranteed to not share its state with any other drawable. mDrawable.mutate(); ColorMatrix cm = new ColorMatrix(); cm.setSaturation( 0); ColorMatrixColorFilter cf = new ColorMatrixColorFilter(cm); mDrawable.setColorFilter(cf); |