Android圖片壓縮功能匯總

原圖：width:2976; height:2976原圖實(shí)際:--->byte:2299820 Mb:2.19328質(zhì)量壓縮 size--->:byte:1599831 kb:1562.33496按比例壓縮 size--->:byte:191707 kb:187.21387魯班壓縮 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); //保存圖片    }

/**     * 把bitmap轉(zhuǎn)化成圖片存儲(chǔ)在本地     *     * @param bitmap     * @param outPath 本地的存儲(chǔ)路徑     * @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;    }

/**     * 按比例壓縮     *     * @param path    原圖片路徑     * @param targetW 壓縮后寬度     * @param targetH 壓縮后高度     * @return 壓縮后的圖片的保存路徑     */    public static String compressScale(String path,, String outPath, int targetW, int targetH) throws FileNotFoundException {        // 獲取option          BitmapFactory.Options options = new BitmapFactory.Options();        // inJustDecodeBounds設(shè)置為true,這樣使用該option decode出來的Bitmap是null，          // 只是把長(zhǎng)寬存放到option中          options.inJustDecodeBounds = true;        // 此時(shí)bitmap為null          Bitmap bitmap = BitmapFactory.decodeFile(path, options);        int inSampleSize = 1; // 1是不縮放          // 計(jì)算寬高縮放比例          int inSampleSizeW = options.outWidth / targetW;        int inSampleSizeH = options.outHeight / targetH;        // 最終取大的那個(gè)為縮放比例，這樣才能適配，例如寬縮放3倍才能適配屏幕，而          // 高不縮放就可以，那樣的話如果按高縮放，寬在屏幕內(nèi)就顯示不下了          if (inSampleSizeW > inSampleSizeH) {            inSampleSize = inSampleSizeW;        } else {            inSampleSize = inSampleSizeH;        }        // 一定要記得將inJustDecodeBounds設(shè)為false，否則Bitmap為null          options.inJustDecodeBounds = false;        // 設(shè)置縮放比例(采樣率)          options.inSampleSize = inSampleSize;        bitmap = BitmapFactory.decodeFile(path, options);        boolean isSuccess = storeImage(bitmap, outPath);        if (isSuccess) {            return outPath;        }        return "";    }

/**     * 獲取本地文件大小     *     * @param imgPath 圖片的路徑     * @return 圖片實(shí)際的大小，單位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)                                   // 傳人要壓縮的圖片列表                .ignoreBy(100)                                  // 忽略不壓縮圖片的大小                .setTargetDir(pressPath)                        // 設(shè)置壓縮后文件存儲(chǔ)位置                .setCompressListener(new OnCompressListener() { //設(shè)置回調(diào)                    @Override                    public void onStart() {                        // TODO 壓縮開始前調(diào)用，可以在方法內(nèi)啟動(dòng) loading UI                        Log.i(TAG, "onStart:開始魯班壓縮 ");                    }
                    @Override                    public void onSuccess(File file) {                        // TODO 壓縮成功后調(diào)用，返回壓縮后的圖片文件                        Glide.with(activity).load(file).into(iv2);                        Log.i(TAG, "onSuccess: 魯班壓縮成功 ：");                        try {                            int size = new FileInputStream(file).available();                            Log.i("tag", "魯班壓縮 size--->:" + "byte:" + size + "    kb:"                                    + (float) size / 1024);                        } catch (IOException e) {                            e.printStackTrace();                        }                    }
                    @Override                    public void onError(Throwable e) {                        // TODO 當(dāng)壓縮過程出現(xiàn)問題時(shí)調(diào)用                        Log.i(TAG, "onError: 魯班壓縮出錯(cuò)");                    }                }).launch();    //啟動(dòng)壓縮    }