Android 保存图片到相册

   /**
     * 保存图片到相册
     */
    public void saveImageToGallery(Bitmap mBitmap) {
        if (!Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {

            ToastUtils.showToast(CodeActivity.this, "sdcard未使用");
            return;
        }
        // 首先保存图片
        File appDir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM).getAbsoluteFile();
        if (!appDir.exists()) {
            appDir.mkdir();
        }
        String fileName = System.currentTimeMillis() + ".jpg";
        File file = new File(appDir, fileName);
        try {
            FileOutputStream fos = new FileOutputStream(file);
            mBitmap.compress(Bitmap.CompressFormat.JPEG, 100, fos);
            fos.flush();
            fos.close();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
            return;
        } catch (IOException e) {
            e.printStackTrace();
            return;
        }

        // 其次把文件插入到系统图库
        try {
            MediaStore.Images.Media.insertImage(getApplication().getContentResolver(), file.getAbsolutePath(), fileName, null);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } // 最后通知图库更新

        getApplication().sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, Uri.parse("file://" + "")));


    }