Android图片压缩功能汇总

原图：width:2976; height:2976原图实际:--->byte:2299820 Mb:2.19328质量压缩 size--->:byte:1599831 kb:1562.33496按比例压缩 size--->:byte:191707 kb:187.21387鲁班压缩 size--->:byte:143792 kb:140.42188

 public void getBitmap(String imgPath, String outPath) {          BitmapFactory.Options newOpts = new BitmapFactory.Options();          newOpts.inJustDecodeBounds = false;          newOpts.inPurgeable = true;          newOpts.inInputShareable = true;          // Do not compress          newOpts.inSampleSize = 1;          newOpts.inPreferredConfig = Config.RGB_565;          storeImage(bitmap, outPath); //保存图片    }

/**     * 把bitmap转化成图片存储在本地     *     * @param bitmap     * @param outPath 本地的存储路径     * @throws FileNotFoundException     */    public static boolean storeImage(Bitmap bitmap, String outPath) throws FileNotFoundException {        FileOutputStream os = new FileOutputStream(outPath);        boolean compressResult = bitmap.compress(Bitmap.CompressFormat.JPEG, 100, os);        return compressResult;    }

/**     * 按比例压缩     *     * @param path    原图片路径     * @param targetW 压缩后宽度     * @param targetH 压缩后高度     * @return 压缩后的图片的保存路径     */    public static String compressScale(String path,, String outPath, int targetW, int targetH) throws FileNotFoundException {        // 获取option          BitmapFactory.Options options = new BitmapFactory.Options();        // inJustDecodeBounds设置为true,这样使用该option decode出来的Bitmap是null，          // 只是把长宽存放到option中          options.inJustDecodeBounds = true;        // 此时bitmap为null          Bitmap bitmap = BitmapFactory.decodeFile(path, options);        int inSampleSize = 1; // 1是不缩放          // 计算宽高缩放比例          int inSampleSizeW = options.outWidth / targetW;        int inSampleSizeH = options.outHeight / targetH;        // 最终取大的那个为缩放比例，这样才能适配，例如宽缩放3倍才能适配屏幕，而          // 高不缩放就可以，那样的话如果按高缩放，宽在屏幕内就显示不下了          if (inSampleSizeW > inSampleSizeH) {            inSampleSize = inSampleSizeW;        } else {            inSampleSize = inSampleSizeH;        }        // 一定要记得将inJustDecodeBounds设为false，否则Bitmap为null          options.inJustDecodeBounds = false;        // 设置缩放比例(采样率)          options.inSampleSize = inSampleSize;        bitmap = BitmapFactory.decodeFile(path, options);        boolean isSuccess = storeImage(bitmap, outPath);        if (isSuccess) {            return outPath;        }        return "";    }

/**     * 获取本地文件大小     *     * @param imgPath 图片的路径     * @return 图片实际的大小，单位byte     */    public static int getFileSize(String imgPath) {        int size = 0;        try {            FileInputStream fis = new FileInputStream(new File(imgPath));            size = fis.available();        } catch (FileNotFoundException e) {            e.printStackTrace();        } catch (IOException e) {            e.printStackTrace();        }        return size;    }

compile 'top.zibin:Luban:1.1.3'

private void lunBanPress(String path) {        String pressPath = Environment.getExternalStorageDirectory().getPath();        Luban.with(this)                .load(path)                                   // 传人要压缩的图片列表                .ignoreBy(100)                                  // 忽略不压缩图片的大小                .setTargetDir(pressPath)                        // 设置压缩后文件存储位置                .setCompressListener(new OnCompressListener() { //设置回调                    @Override                    public void onStart() {                        // TODO 压缩开始前调用，可以在方法内启动 loading UI                        Log.i(TAG, "onStart:开始鲁班压缩 ");                    }
                    @Override                    public void onSuccess(File file) {                        // TODO 压缩成功后调用，返回压缩后的图片文件                        Glide.with(activity).load(file).into(iv2);                        Log.i(TAG, "onSuccess: 鲁班压缩成功 ：");                        try {                            int size = new FileInputStream(file).available();                            Log.i("tag", "鲁班压缩 size--->:" + "byte:" + size + "    kb:"                                    + (float) size / 1024);                        } catch (IOException e) {                            e.printStackTrace();                        }                    }
                    @Override                    public void onError(Throwable e) {                        // TODO 当压缩过程出现问题时调用                        Log.i(TAG, "onError: 鲁班压缩出错");                    }                }).launch();    //启动压缩    }