allprojects {
  	repositories {
  		...
  		maven { url 'https://jitpack.io' }
  	}
  }

	dependencies {
          implementation 'com.github.sunnydlee:FastZXing:v1.2.1'
  }

       //打开扫描页
       Intent intent = new Intent(this, FastCaptureActivity.class);
       startActivity(intent);
       //设置扫描结果回调
       FastZXing.getInstance().setResultCallBack(new CaptureActivity.ResultCallBack() {
           @Override
           public void decodeResult(String result, CaptureActivity activity) {
               if (activity != null) {
                   activity.restartCameraScan();//重新开启扫描,连续扫描
               }
           }

       });