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);    //獲取屏幕分辨率    sShotScreenWidth = dm.widthPixels;    sShotScreenHeight = dm.heightPixels;    sShotScreenSize = sShotScreenWidth * sShotScreenHeight;  }  /**   * 圖片合成   *    * @param bitmap 位圖1   * @param mark 位圖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);// 創建一個長寬一樣的位圖    Canvas cv = new Canvas(newbitmap);    cv.drawBitmap(bitmap, 0, 0, null);// 在 0，0坐標開始畫入bitmap    cv.drawBitmap(mark, w - mW , h - mH , null);// 在右下角畫入水印mark    cv.save(Canvas.ALL_SAVE_FLAG);// 保存    cv.restore();// 存儲    return newbitmap;  }  /**   * 放大縮小圖片   * @param bitmap 位圖   * @param w 新的寬度   * @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);  }  /**   * 旋轉圖片   * @param bitmap 要旋轉的圖片   * @param angle 旋轉角度   * @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);  }  /**   * 圓形圖片   *@param source 位圖   * @param strokeWidth 裁剪范圍 0表示最大   * @param bl 是否需要描邊   * @param bl 畫筆粗細   * @param bl 顏色代碼   * @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);//創建畫布    Paint paint = new Paint();    paint.setAntiAlias(true);    canvas.drawCircle(diameter / 2, diameter / 2, diameter / 2, paint);//繪制圓形    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;//默認橘黃色      paint.setColor(color);      paint.setStyle(Paint.Style.STROKE);//描邊      paint.setStrokeWidth(edge);      canvas.drawCircle(diameter / 2, diameter / 2, diameter / 2, paint);    }    return target;  }  /**   * 圓角圖片   * @param bitmap 位圖   * @param rx x方向上的圓角半徑   * @param ry y方向上的圓角半徑   * @param bl 是否需要描邊   * @param bl 畫筆粗細   * @param bl 顏色代碼   * @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);//創建畫布    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);//繪制圓角矩形    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;//默認橘黃色      paint.setColor(color);      paint.setColor(color);      paint.setStyle(Paint.Style.STROKE);//描邊      paint.setStrokeWidth(edge);      canvas.drawRoundRect(rectF, rx, ry, paint);    }    return output;  }  /**   * 按比例裁剪圖片   * @param bitmap 位圖   * @param wScale 裁剪寬 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);  }  /**   * 獲得帶倒影的圖片方法   * @param bitmap 位圖   * @param region 倒影區域 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);//鏡像縮放    Bitmap reflectionBitmap = Bitmap.createBitmap(                         bitmap,0                        , (int)(height*(1-region))//從哪個點開始繪制                        , width                        ,(int) (height*region)//繪制多高                        , 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));//取兩層繪制交集。顯示下層。    canvas.drawRect(0, height, width, reflectionWithBitmap.getHeight() , paint);    return reflectionWithBitmap;  }  /**   * 圖片質量壓縮   * @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);  }  /**   * 高級圖片質量壓縮   *@param bitmap 位圖   * @param maxSize 壓縮后的大小，單位kb   */  public static Bitmap imageZoom(Bitmap bitmap, double maxSize) {    // 將bitmap放至數組中，意在獲得bitmap的大小（與實際讀取的原文件要大）    ByteArrayOutputStream baos = new ByteArrayOutputStream();    // 格式、質量、輸出流    bitmap.compress(Bitmap.CompressFormat.PNG, 70, baos);    byte[] b = baos.toByteArray();    // 將字節換成KB    double mid = b.length / 1024;    // 獲取bitmap大小 是允許最大大小的多少倍    double i = mid / maxSize;    // 判斷bitmap占用空間是否大于允許最大空間 如果大于則壓縮 小于則不壓縮    doRecycledIfNot(bitmap);    if (i > 1) {      // 縮放圖片 此處用到平方根 將寬帶和高度壓縮掉對應的平方根倍      // （保持寬高不變，縮放后也達到了最大占用空間的大小）      return scaleWithWH(bitmap,bitmap.getWidth() / Math.sqrt(i),              bitmap.getHeight() / Math.sqrt(i));    }    return null;  }  /***   * 圖片縮放   *@param bitmap 位圖   * @param w 新的寬度   * @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視頻流格式轉bitmap   * @param data YUV視頻流格式   * @return width 設置寬度   * @return width 設置高度   */  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參數提供    ByteArrayOutputStream baos = new ByteArrayOutputStream();    yuvimage.compressToJpeg(new Rect(0, 0, yuvimage.getWidth(), yuvimage.getHeight()), 100, baos);//    // 80--JPG圖片的質量[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;  }  /**   * 圖片路徑轉bitmap   * @param file 圖片的絕對路徑   * @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保存到指定路徑   * @param file 圖片的絕對路徑   * @param file 位圖   * @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;  }  /**   * 回收一個未被回收的Bitmap   *@param bitmap   */  public static void doRecycledIfNot(Bitmap bitmap) {    if (!bitmap.isRecycled()) {      bitmap.recycle();    }  }}