NFC 验证

返回码

快速开始

1. Sample Application. 在Android Studio中打开示例应用程序，并作为参考。

2. 参考引用

   repositories {
          flatDir {
              dirs 'libs'
          }
      }
   
   dependencies {
      implementation(name: 'vechain-verify-sdk', ext: 'aar')
      compileOnly files('sdkenc/classes.jar')
       implementation 'com.squareup.okhttp3:okhttp:3.13.1'
       implementation 'com.squareup.retrofit2:converter-gson:2.4.0'
       implementation 'com.squareup.retrofit2:retrofit:2.4.0'
       implementation 'com.squareup.retrofit2:adapter-rxjava2:2.4.0'
       implementation 'io.reactivex.rxjava2:rxandroid:2.0.2'
       implementation 'io.reactivex.rxjava2:rxjava:2.1.16'
   }

3. 在Android清单中请求NFC和Internet访问

   <uses-permission android:name="android.permission.NFC"/>
   <uses-permission android:name="android.permission.INTERNET"/>

4. 注册SDK，在开始验证之前调用此方法

      @Override
      protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);   
   
          String verifyID = "verifyId is got from VeChain Toolchain Portal/Developer Center";
   
          /*
            Register SDK, Call this method before you start to verify.
   
           */
   
          VeChainNFCSDK.registerSDK(this, verifyID, new MySignAction());
      }

   public class MySignAction implements SignAction {
   
    /*
       MySignAction is the implementation of the interface SignAction. The purpose is to sign the incoming pair of challengeId and notifier. onSignResult (signInfo) to notify SDK to continue the registration process. 
    */
      @Override
      public void sign(Context context, String challengeId, SignNotifier signNotifier) {
          String certString = "Your certificate string";
          String certKeyString = "Your certificate key";
          String signature = CertUtils.getSignInfo(certString, certKeyString, challengeId);
   
           //More Detail about how to sign the challengeId and get signature, refers to Appendix A: FAQ -  How to Sign ChallengeID
          signNotifier.onSignResult(signature, "");
      }
   }

5. 验证NFC标签的活动

   @Override
      protected void onResume() {
          super.onResume();
   
          VeChainNFCSDK.onResume(MainActivity.this, new VeChainNFCSDK.NfcSDKCallback() {
              @Override
              public void onVerifyStart() {
                  //a callback to be invoked when the system finds a tag while the foreground activity is operating in reader mode.
                  //You can refresh UI (like a loading dialog) in this callback.
              }
   
              @Override
              public void onResultReceived(VerifyResult verifyResult) {
   
                  int code = verifyResult.getCode();
   
                  if (code == ResultCode.CODE_NETWORK_ERROR) {
                      //Network error
                      Toast.makeText(MainActivity.this, "Network Error", Toast.LENGTH_SHORT).show();
                      return;
                  }
   
                  if (code != ResultCode.OK) {
                      //verify fail
                      Toast.makeText(MainActivity.this, "Verify failed: error code is " + code, Toast.LENGTH_SHORT).show();
                      return;
                  }
   
                  //verify success
                  String vid = verifyResult.getVid();
   
                  Toast.makeText(MainActivity.this, "VeChain verified Vid is " + vid, Toast.LENGTH_SHORT).show();
              }
          });
      }
   
      @Override
      protected void onPause() {
          super.onPause();
          VeChainNFCSDK.onPause();
      }
   
      @Override
      protected void onDestroy() {
          super.onDestroy();
          VeChainNFCSDK.onDestroy();
      } 
   

API 参考

通过调用SDK工具类：com.vechain.prosdk.nfctools.VeChainNFCSDK，可以实现NFC sdk功能。

注册

    /**
     * Register SDK
     * Call this method before verify the chip.
     *
     * @param context  the context
     * @param verifyId is got from VeChain Toolchain Portal/Developer Center;


     */
    public static void registerSDK(@NonNull Context context, @NonNull String verifyId, @NonNull SignAction signAction)
    

启用NFC验证

    /**
     * enable nfc reader mode while this Activity is in the foreground.
     * call this method every time the activity is resumed.
     *
     * @param activity the Activity that requests the adapter to be in reader mode
     * @param callback the callback to be invoked when nfc verify result get
     */
    public static void onResume(@NonNull Activity activity, @NonNull NfcSDKCallback callback)   
    

禁用NFC验证

    /**
     * disable nfc reader mode before your Activity completes Activity#onPause.
     */
    public static void onPause()
     

销毁

    /**
     * Cancel verify request while Activity in Activity#onDestroy.
     */
    public static void onDestroy()
    

验证二维码类型vid

/**
     * Check if QR-code is VID
     */
    public static void verifyQRCode(String qrcode, @NonNull NfcSDKCallback callback) {
        VidSDK.get().verifyVid(qrcode, callback);
    }

NFCSDK回调

    /**
     * Provides callbacks to handle the lifecycle of nfc sdk
     */
    public interface NfcSDKCallback {

        /**
         * The callback to be invoked when the system finds a tag while the foreground activity is
         * operating in reader mode.
         * You can refresh UI (like a loading dialog) in this callback.
         */
        void onVerifyStart();

        /**
         * Provides this callback to handle the verifyResult
         * The callback called on verify successful or failed.
         * @param verifyResult result contains result code, vid.
         */
        void onResultReceived(VerifyResult verifyResult);
    }
    

版本

    /**
     * Get SDK Version
     */
    public static String getVersion()