android 上传图片(压缩) Bitmap 转File

/**     * 压缩图片（质量压缩）     * @param bitmap     */    public static File comPRessImage(Bitmap bitmap) {        ByteArrayOutputStream baos = new ByteArrayOutputStream();        bitmap.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 > 500) {  //循环判断如果压缩后图片是否大于500kb,大于继续压缩            baos.reset();//重置baos即清空baos            options -= 10;//每次都减少10            bitmap.compress(Bitmap.CompressFormat.JPEG, options, baos);//这里压缩options%，把压缩后的数据存放到baos中            long length = baos.toByteArray().length;        }        SimpleDateFormat format = new SimpleDateFormat("yyyyMMddHHmmss");        Date date = new Date(System.currentTimeMillis());        String filename = format.format(date);        File file = new File(Environment.getExternalStorageDirectory(),filename+".png");        try {            FileOutputStream fos = new FileOutputStream(file);            try {                fos.write(baos.toByteArray());                fos.flush();                fos.close();            } catch (IOException e) {                BAFLogger.e(TAG,e.getMessage());                e.printStackTrace();            }        } catch (FileNotFoundException e) {            BAFLogger.e(TAG,e.getMessage());            e.printStackTrace();        }        recycleBitmap(bitmap);        return file;    }
//释放
public static void recycleBitmap(Bitmap... bitmaps) {        if (bitmaps==null) {            return;        }        for (Bitmap bm : bitmaps) {            if (null != bm && !bm.isRecycled()) {                bm.recycle();            }        }    }