Android 压缩图片 方法

/**
     * 压缩图片
     * @param file
     * @param destPath
     * @return
     */
    public static File thirdCompress(File file, String destPath) {
        String filename = com.duudu.lib.utils.FileUtils.getFileNameNoSuffix(file);
        String thumb = destPath;
        String filePath = file.getAbsolutePath();
        int angle = getImageSpinAngle(filePath);
        int width = getImageSize(filePath)[0];
        int height = getImageSize(filePath)[1];
        int thumbW = width % 2 == 1 ? width + 1 : width;
        int thumbH = height % 2 == 1 ? height + 1 : height;
        width = thumbW > thumbH ? thumbH : thumbW;
        height = thumbW > thumbH ? thumbW : thumbH;
        double scale = (double) width / (double) height;
        double size;
        int multiple;
        if (scale <= 1.0D && scale > 0.5625D) {
            if (height < 1664) {
                if (file.length() / 1024L < 150L) {
                    return file;
                }

                size = (double) (width * height) / Math.pow(1664.0D, 2.0D) * 150.0D;
                size = size < 60.0D ? 60.0D : size;
            } else if (height >= 1664 && height < 4990) {
                thumbW = width / 2;
                thumbH = height / 2;
                size = (double) (thumbW * thumbH) / Math.pow(2495.0D, 2.0D) * 300.0D;
                size = size < 60.0D ? 60.0D : size;
            } else if (height >= 4990 && height < 10240) {
                thumbW = width / 4;
                thumbH = height / 4;
                size = (double) (thumbW * thumbH) / Math.pow(2560.0D, 2.0D) * 300.0D;
                size = size < 100.0D ? 100.0D : size;
            } else {
                multiple = height / 1280 == 0 ? 1 : height / 1280;
                thumbW = width / multiple;
                thumbH = height / multiple;
                size = (double) (thumbW * thumbH) / Math.pow(2560.0D, 2.0D) * 300.0D;
                size = size < 100.0D ? 100.0D : size;
            }
        } else if (scale <= 0.5625D && scale > 0.5D) {
            if (height < 1280 && file.length() / 1024L < 200L) {
                return file;
            }

            multiple = height / 1280 == 0 ? 1 : height / 1280;
            thumbW = width / multiple;
            thumbH = height / multiple;
            size = (double) (thumbW * thumbH) / 3686400.0D * 400.0D;
            size = size < 100.0D ? 100.0D : size;
        } else {
            multiple = (int) Math.ceil((double) height / (1280.0D / scale));
            thumbW = width / multiple;
            thumbH = height / multiple;
            size = (double) (thumbW * thumbH) / (1280.0D * (1280.0D / scale)) * 500.0D;
            size = size < 100.0D ? 100.0D : size;
        }

        return compress(filePath, thumb, thumbW, thumbH, angle, (long) size);
    }

    public static int[] getImageSize(String imagePath) {
        int[] res = new int[2];
        BitmapFactory.Options options = new BitmapFactory.Options();
        options.inJustDecodeBounds = true;
        options.inSampleSize = 1;
        BitmapFactory.decodeFile(imagePath, options);
        res[0] = options.outWidth;
        res[1] = options.outHeight;
        return res;
    }

    private static Bitmap compress(String imagePath, int width, int height) {
        BitmapFactory.Options options = new BitmapFactory.Options();
        options.inJustDecodeBounds = true;
        BitmapFactory.decodeFile(imagePath, options);
        int outH = options.outHeight;
        int outW = options.outWidth;
        int inSampleSize = 1;
        int heightRatio;
        int widthRatio;
        if (outH > height || outW > width) {
            heightRatio = outH / 2;

            for (widthRatio = outW / 2; heightRatio / inSampleSize > height && widthRatio / inSampleSize > width; inSampleSize *= 2) {
                ;
            }
        }

        options.inSampleSize = inSampleSize;
        options.inJustDecodeBounds = false;
        heightRatio = (int) Math.ceil((double) ((float) options.outHeight / (float) height));
        widthRatio = (int) Math.ceil((double) ((float) options.outWidth / (float) width));
        if (heightRatio > 1 || widthRatio > 1) {
            if (heightRatio > widthRatio) {
                options.inSampleSize = heightRatio;
            } else {
                options.inSampleSize = widthRatio;
            }
        }

        options.inJustDecodeBounds = false;
        return BitmapFactory.decodeFile(imagePath, options);
    }

    private static int getImageSpinAngle(String path) {
        short degree = 0;

        try {
            ExifInterface exifInterface = new ExifInterface(path);
            int orientation = exifInterface.getAttributeInt("Orientation", 1);
            switch (orientation) {
                case 3:
                    degree = 180;
                    break;
                case 6:
                    degree = 90;
                    break;
                case 8:
                    degree = 270;
            }
        } catch (IOException var4) {
            logger.e(var4);
        }

        return degree;
    }

    private static File compress(String largeImagePath, String thumbFilePath, int width, int height, int angle, long size) {
        Bitmap thbBitmap = compress(largeImagePath, width, height);
        thbBitmap = rotatingImage(angle, thbBitmap);
        return saveImage(thumbFilePath, thbBitmap, size);
    }

    private static Bitmap rotatingImage(int angle, Bitmap bitmap) {
        Matrix matrix = new Matrix();
        matrix.postRotate((float) angle);
        return Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), matrix, true);
    }

    private static File saveImage(String filePath, Bitmap bitmap, long size) {
        if (bitmap == null) {
            throw new NullPointerException(String.valueOf("bitmap cannot be null"));
        } else {
            File result = new File(filePath.substring(0, filePath.lastIndexOf("/")));
            if (!result.exists() && !result.mkdirs()) {
                return null;
            } else {
                ByteArrayOutputStream stream = new ByteArrayOutputStream();
                int options = 100;
                bitmap.compress(Bitmap.CompressFormat.JPEG, options, stream);

                while ((long) (stream.toByteArray().length / 1024) > size && options > 6) {
                    stream.reset();
                    options -= 6;
                    bitmap.compress(Bitmap.CompressFormat.JPEG, options, stream);
                }

                bitmap.recycle();

                try {
                    FileOutputStream fos = new FileOutputStream(filePath);
                    fos.write(stream.toByteArray());
                    fos.flush();
                    fos.close();
                    stream.close();
                } catch (IOException var8) {
                    var8.printStackTrace();
                }

                return new File(filePath);
            }
        }
    }