android长按图片保存到本地相册

最近项目需要把二维码保存到本地，代码如下：

 public static String saveBitmap(Bitmap bitmap) {
        try {
            // 获取内置SD卡路径
            String sdCardPath = Environment.getExternalStorageDirectory().getPath();
            // 图片文件路径
            File file = new File(sdCardPath);
            File[] files = file.listFiles();
            for (int i = 0; i < files.length; i++) {
                File file1 = files[i];
                String name = file1.getName();
                if (name.endsWith("twocode.png")) {
                    boolean flag = file1.delete();
                    LogUtils.print("删除 + " + flag);
                }
            }
            String filePath = sdCardPath + "/twocode.png";
            file = new File(filePath);
            FileOutputStream os = new FileOutputStream(file);
            bitmap.compress(Bitmap.CompressFormat.PNG, 100, os);
            os.flush();
            os.close();

            //把文件插入到系统图库
            MediaStore.Images.Media.insertImage(App.getApp().getContentResolver(),
                    file.getAbsolutePath(), "twocode.png", null);

            //保存图片后发送广播通知更新数据库
            Uri uri = Uri.fromFile(file);
            App.getApp().sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, uri));

            Toast.makeText(App.getApp(),"二维码保存成功",Toast.LENGTH_SHORT).show();

            return filePath;
        } catch (IOException e) {
            e.printStackTrace();
            return "";
        }
    }

希望对大家有帮助