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);// 建立一個長寬同樣的位圖
Canvas cv = new Canvas(newbitmap); cv.drawBitmap(bitmap, 0, 0, null);// 在 0，0座標開始畫入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 裁剪範圍 0表示最大 * @param bl 是否須要描邊 * @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);//建立畫布
Paint paint = new Paint(); paint.setAntiAlias(true); canvas.drawCircle(diameter / 2, diameter / 2, diameter / 2, paint);//繪製圓形
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 是否須要描邊 * @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);//建立畫布
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);//繪製圓角矩形
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); } /** * 得到帶倒影的圖片方法 * @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))//從哪一個點開始繪製
, width ,(int) (height*region)//繪製多高
, 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));//取兩層繪製交集。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 壓縮後的大小，單位kb */
public static Bitmap imageZoom(Bitmap bitmap, double maxSize) { // 將bitmap放至數組中，意在得到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 是容許最大大小的多少倍
double i = mid / maxSize; // 判斷bitmap佔用空間是否大於容許最大空間 若是大於則壓縮 小於則不壓縮
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，縮放後也達到了最大佔用空間的大小）
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; } /** * 圖片資源文件轉bitmap * @param file 圖片的絕對路徑 * @return bitmap */
public static Bitmap getBitmapResources(Context context,int resId){ return BitmapFactory.decodeResource(context.getResources(),resId); } /** * 將圖片路徑轉Bitmap * @Param path 圖片路徑 * @return Bitmap */
public static Bitmap getBitmapPath(String path){ return BitmapFactory.decodeFile(path); } /** * 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(); } } /** * 將圖片轉換成Base64編碼的字符串 */
public static String imageToBase64(String path){ if(TextUtils.isEmpty(path)){ return null; } InputStream is = null; byte[] data = null; String result = null; try{ is = new FileInputStream(path); //建立一個字符流大小的數組。
data = new byte[is.available()]; //寫入數組
is.read(data); //用默認的編碼格式進行編碼
result = Base64.encodeToString(data,Base64.DEFAULT); }catch (Exception e){ e.printStackTrace(); }finally { if(null !=is){ try { is.close(); } catch (IOException e) { e.printStackTrace(); } } } return result; }
}
private Bitmap createRGBImage(Bitmap bitmap,int type) { int bitmap_w = bitmap.getWidth(); int bitmap_h = bitmap.getHeight(); int[] arrayColor = new int[bitmap_w * bitmap_h]; int count = 0; int color; for (int i = 0; i < bitmap_h; i++) { for (int j = 0; j < bitmap_w; j++) { color = bitmap.getPixel(j, i); if (color == -131073) {//顏色十進制值
arrayColor[count] = Color.TRANSPARENT; }else{ arrayColor[count] = color; } count++; } } bitmap = Bitmap.createBitmap(arrayColor, bitmap_w, bitmap_h, Bitmap.Config.ARGB_8888); return bitmap; }