public final class BitmapUtils { public static final String TAG = "BitmapUtil"; private static int sShotScreenWidth = 480; private static int sShotScreenHeight = 720; private static int sShotScreenSize = sShotScreenWidth * sShotScreenHeight; @SuppressLint("StaticFieldLeak") private static Context mContext; @SuppressLint("StaticFieldLeak") private static Activity mActivity; public void init(Context context,Activity ac) { mContext=context; mActivity=ac; DisplayMetrics dm = new DisplayMetrics(); ac.getWindowManager().getDefaultDisplay().getMetrics(dm); //获取屏幕分辨率 sShotScreenWidth = dm.widthPixels; sShotScreenHeight = dm.heightPixels; sShotScreenSize = sShotScreenWidth * sShotScreenHeight; } /** * 图片合成 * * @param bitmap 位图1 * @param mark 位图2 * @return Bitmap */ public static Bitmap createBitmap(Bitmap bitmap, Bitmap mark) { int w = bitmap.getWidth(); int h = bitmap.getHeight(); int mW = mark.getWidth(); int mH = mark.getHeight(); Bitmap newbitmap = Bitmap.createBitmap(w, h, Config.ARGB_8888);// 创建一个长宽一样的位图 Canvas cv = new Canvas(newbitmap); cv.drawBitmap(bitmap, 0, 0, null);// 在 0，0坐标开始画入bitmap cv.drawBitmap(mark, w - mW , h - mH , null);// 在右下角画入水印mark cv.save(Canvas.ALL_SAVE_FLAG);// 保存 cv.restore();// 存储 return newbitmap; } /** * 放大缩小图片 * @param bitmap 位图 * @param w 新的宽度 * @param h 新的高度 * @return Bitmap */ public static 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); return Bitmap.createBitmap(bitmap, 0, 0, width, height, matrix, true); } /** * 旋转图片 * @param bitmap 要旋转的图片 * @param angle 旋转角度 * @return bitmap */ public static Bitmap rotate(Bitmap bitmap,int angle) { Matrix matrix = new Matrix(); matrix.postRotate(angle); return Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), matrix, true); } /** * 圆形图片 *@param source 位图 * @param strokeWidth 裁剪范围 0表示最大 * @param bl 是否需要描边 * @param bl 画笔粗细 * @param bl 颜色代码 * @return bitmap */ public static Bitmap createCircleBitmap(Bitmap source, int strokeWidth, boolean bl,int edge,int color) { int diameter = source.getWidth() < source.getHeight() ? source.getWidth() : source.getHeight(); Bitmap target = Bitmap.createBitmap(diameter, diameter, Config.ARGB_8888); Canvas canvas = new Canvas(target);//创建画布 Paint paint = new Paint(); paint.setAntiAlias(true); canvas.drawCircle(diameter / 2, diameter / 2, diameter / 2, paint);//绘制圆形 paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));//取相交裁剪 canvas.drawBitmap(source, strokeWidth, strokeWidth, paint); if(bl) { if (color == 0) color = 0xFFFEA248;//默认橘黄色 paint.setColor(color); paint.setStyle(Paint.Style.STROKE);//描边 paint.setStrokeWidth(edge); canvas.drawCircle(diameter / 2, diameter / 2, diameter / 2, paint); } return target; } /** * 圆角图片 * @param bitmap 位图 * @param rx x方向上的圆角半径 * @param ry y方向上的圆角半径 * @param bl 是否需要描边 * @param bl 画笔粗细 * @param bl 颜色代码 * @return bitmap */ public static Bitmap createCornerBitmap(Bitmap bitmap,int rx,int ry,boolean bl,int edge,int color) { Bitmap output = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Config.ARGB_8888); Canvas canvas = new Canvas(output);//创建画布 Paint paint = new Paint(); paint.setAntiAlias(true); Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight()); RectF rectF = new RectF(rect); canvas.drawRoundRect(rectF, rx, ry, paint);//绘制圆角矩形 paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));//取相交裁剪 canvas.drawBitmap(bitmap, rect, rect, paint); if(bl) { if (color == 0) color = 0xFFFEA248;//默认橘黄色 paint.setColor(color); paint.setColor(color); paint.setStyle(Paint.Style.STROKE);//描边 paint.setStrokeWidth(edge); canvas.drawRoundRect(rectF, rx, ry, paint); } return output; } /** * 按比例裁剪图片 * @param bitmap 位图 * @param wScale 裁剪宽 0~100% * @param hScale 裁剪高 0~100% * @return bitmap */ public static Bitmap cropBitmap(Bitmap bitmap, float wScale, float hScale) { int w = bitmap.getWidth(); int h = bitmap.getHeight(); int wh = (int) (w * wScale); int hw = (int) (h * hScale); int retX = (int) (w * (1 - wScale) / 2); int retY = (int) (h * (1 - hScale) / 2); return Bitmap.createBitmap(bitmap, retX, retY, wh, hw, null, false); } /** * 获得带倒影的图片方法 * @param bitmap 位图 * @param region 倒影区域 0.1~1 * @return bitmap */ public static Bitmap createReflectionBitmap(Bitmap bitmap,float region) { int width = bitmap.getWidth(); int height = bitmap.getHeight(); Matrix matrix = new Matrix(); matrix.preScale(1, -1);//镜像缩放 Bitmap reflectionBitmap = Bitmap.createBitmap( bitmap,0 , (int)(height*(1-region))//从哪个点开始绘制 , width ,(int) (height*region)//绘制多高 , matrix, false); Bitmap reflectionWithBitmap = Bitmap.createBitmap(width,height+ (int) (height*region), Config.ARGB_8888); Canvas canvas = new Canvas(reflectionWithBitmap); canvas.drawBitmap(bitmap, 0, 0, null); canvas.drawBitmap(reflectionBitmap, 0, height , null); LinearGradient shader = new LinearGradient(0, bitmap.getHeight(), 0, reflectionWithBitmap.getHeight() , 0x70ffffff, 0x00ffffff, TileMode.CLAMP); Paint paint = new Paint(); paint.setShader(shader); paint.setXfermode(new PorterDuffXfermode(Mode.DST_IN));//取两层绘制交集。显示下层。 canvas.drawRect(0, height, width, reflectionWithBitmap.getHeight() , paint); return reflectionWithBitmap; } /** * 图片质量压缩 * @param bitmap * @param many 百分比 * @return */ public static Bitmap compressBitmap(Bitmap bitmap, float many){ ByteArrayOutputStream baos = new ByteArrayOutputStream(); bitmap.compress(Bitmap.CompressFormat.JPEG, (int)many*100, baos); ByteArrayInputStream isBm = new ByteArrayInputStream(baos.toByteArray()); return BitmapFactory.decodeStream(isBm, null, null); } /** * 高级图片质量压缩 *@param bitmap 位图 * @param maxSize 压缩后的大小，单位kb */ public static Bitmap imageZoom(Bitmap bitmap, double maxSize) { // 将bitmap放至数组中，意在获得bitmap的大小（与实际读取的原文件要大） ByteArrayOutputStream baos = new ByteArrayOutputStream(); // 格式、质量、输出流 bitmap.compress(Bitmap.CompressFormat.PNG, 70, baos); byte[] b = baos.toByteArray(); // 将字节换成KB double mid = b.length / 1024; // 获取bitmap大小 是允许最大大小的多少倍 double i = mid / maxSize; // 判断bitmap占用空间是否大于允许最大空间 如果大于则压缩 小于则不压缩 doRecycledIfNot(bitmap); if (i > 1) { // 缩放图片 此处用到平方根 将宽带和高度压缩掉对应的平方根倍 // （保持宽高不变，缩放后也达到了最大占用空间的大小） return scaleWithWH(bitmap,bitmap.getWidth() / Math.sqrt(i), bitmap.getHeight() / Math.sqrt(i)); } return null; } /*** * 图片缩放 *@param bitmap 位图 * @param w 新的宽度 * @param h 新的高度 * @return Bitmap */ public static Bitmap scaleWithWH(Bitmap bitmap, double w, double h) { if (w == 0 || h == 0 || bitmap == null) { return bitmap; } else { int width = bitmap.getWidth(); int height = bitmap.getHeight(); Matrix matrix = new Matrix(); float scaleWidth = (float) (w / width); float scaleHeight = (float) (h / height); matrix.postScale(scaleWidth, scaleHeight); return Bitmap.createBitmap(bitmap, 0, 0, width, height, matrix, true); } } /** * YUV视频流格式转bitmap * @param data YUV视频流格式 * @return width 设置宽度 * @return width 设置高度 */ public static Bitmap getBitmap(byte[] data, int width, int height) { Bitmap bitmap; YuvImage yuvimage = new YuvImage(data, ImageFormat.NV21, width, height, null); //data是onPreviewFrame参数提供 ByteArrayOutputStream baos = new ByteArrayOutputStream(); yuvimage.compressToJpeg(new Rect(0, 0, yuvimage.getWidth(), yuvimage.getHeight()), 100, baos);// // 80--JPG图片的质量[0-100],100最高 byte[] rawImage = baos.toByteArray(); BitmapFactory.Options options = new BitmapFactory.Options(); SoftReference<Bitmap> softRef = new SoftReference<Bitmap>(BitmapFactory.decodeByteArray(rawImage, 0, rawImage .length, options)); bitmap = softRef.get(); return bitmap; } /** * 图片路径转bitmap * @param file 图片的绝对路径 * @return bitmap */ public static Bitmap getAssetImage(String file) { Bitmap bitmap = null; AssetManager am = mActivity.getAssets(); try { InputStream is = am.open(file); bitmap = BitmapFactory.decodeStream(is); is.close(); } catch (IOException e) { e.printStackTrace(); } return bitmap; } /** * bitmap保存到指定路径 * @param file 图片的绝对路径 * @param file 位图 * @return bitmap */ public static boolean saveFile(String file, Bitmap bmp) { if(TextUtils.isEmpty(file) || bmp == null) return false; File f = new File(file); if (f.exists()) { f.delete(); }else { File p = f.getParentFile(); if(!p.exists()) { p.mkdirs(); } } try { FileOutputStream out = new FileOutputStream(f); bmp.compress(Bitmap.CompressFormat.JPEG, 100, out); out.flush(); out.close(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); return false; } return true; } /** * 回收一个未被回收的Bitmap *@param bitmap */ public static void doRecycledIfNot(Bitmap bitmap) { if (!bitmap.isRecycled()) { bitmap.recycle(); } }} 
