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Android：身份证识别功能实现_android身份证识别

作者：Gausst松鼠会 | 2024-06-06 23:15:17

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android身份证识别

说明：

此文使用华为SDK、百度SDK、百度在线API三种方式实现。

一、使用华为SDK实现身份证识别：

说明：免费，不需要联网。

1.AndroidManifest.xml添加权限：

  1. <uses-permission android:name="android.permission.INTERNET" />
  2. <uses-permission android:name="android.permission.CAMERA"/>
  3. <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
  4. <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
  5.  
  6. <uses-feature android:name="android.hardware.camera" />
  7. <uses-feature android:name="android.hardware.camera.autofocus" />

2. 工程根目录build.gradle：

  1. buildscript {
  2.     repositories {
  3.         //...省略之前配的其他地址
  4.         maven { url "https://developer.huawei.com/repo/" }
  5.     }
  6.     dependencies {
  7.         //...省略之前配的其他地址
  8.         classpath 'com.huawei.agconnect:agcp:1.6.0.300'
  9.     }
  10. }
  11.  
  12. allprojects {
  13.     repositories {
  14.         //...省略之前配的其他地址
  15.         maven { url "https://developer.huawei.com/repo/" }
  16.     }
  17. }
3.工程/app/build.gradle：

  1. //...省略之前配的其他地址
  2. apply plugin: 'com.huawei.agconnect'
  3. android {
  4.     //...省略之前配的其他地址
  5.     packagingOptions {
  6.         exclude 'lib/arm64-v8a/libmsoptimize.so'
  7.     }
  8. }
  9. dependencies {
  10.     //...省略之前配的其他地址
  11.     implementation 'com.huawei.hms:ml-computer-card-icr-cn:2.0.3.303'
  12.     implementation 'com.huawei.hms:ml-computer-vision-ocr:2.0.5.301'
  13.     implementation 'com.huawei.hms:ml-computer-vision-ocr-cn-model:2.0.5.301'
  14.     implementation 'com.huawei.hms:ml-computer-vision-ocr-jk-model:2.0.5.301'
  15.     implementation 'com.huawei.hms:ml-computer-vision-ocr-latin-model:2.0.5.301'
  16.     implementation 'com.huawei.hms:ml-computer-card-gcr-plugin:2.0.1.301'
  17. }
4.调用身份证SDK：

(1)身份证识别业务类：

  1. public class HWIDCardScanBiz {
  2.     private static HWIDCardScanBiz I;
  3.  
  4.     public static HWIDCardScanBiz I() {
  5.         if (I == null) {
  6.             I = new HWIDCardScanBiz();
  7.         }
  8.         return I;
  9.     }
  10.  
  11.     /**
  12.      * 打开身份证识别页，调用之前要申请蓝牙动态权限
  13.      */
  14.     public void startIDCardScanActivity(Context context, IDCardScanCallback callback) {
  15.         MLCnIcrCaptureConfig config = new MLCnIcrCaptureConfig.Factory()
  16.                 .setFront(true)
  17.                 .create();
  18.         MLCnIcrCapture icrCapture = MLCnIcrCaptureFactory.getInstance().getIcrCapture(config);
  19.         icrCapture.capture(new HWIDScanCallback(callback), context);
  20.     }
  21.  
  22.  
  23.     private class HWIDScanCallback implements MLCnIcrCapture.CallBack {
  24.  
  25.         private IDCardScanCallback callback;
  26.  
  27.         public HWIDScanCallback(IDCardScanCallback callback) {
  28.             this.callback = callback;
  29.         }
  30.  
  31.         /**
  32.          * 识别成功回调
  33.          */
  34.         @Override
  35.         public void onSuccess(MLCnIcrCaptureResult result) {
  36.             if (result == null) {
  37.                 Toast.makeText(XApp.Companion.getContext(), "识别失败", Toast.LENGTH_SHORT);
  38.                 return;
  39.             }
  40.             if (callback != null) {
  41.                 IDCardInfo info = new IDCardInfo(result.name, result.sex, result.nation, result.birthday, result.address, result.idNum, result.authority, result.validDate, result.sideType);
  42.                 callback.onIDCardResult(info);
  43.             }
  44.         }
  45.  
  46.         @Override
  47.         public void onCanceled() {
  48.         }
  49.  
  50.         @Override
  51.         public void onFailure(int retCode, Bitmap bitmap) {
  52.             Toast.makeText(XApp.Companion.getContext(), "识别失败", Toast.LENGTH_SHORT);
  53.         }
  54.  
  55.         @Override
  56.         public void onDenied() {
  57.         }
  58.     }
  59.  
  60.     public interface IDCardScanCallback {
  61.         void onIDCardResult(IDCardInfo result);
  62.     }
  63. }

(2)调用识别业务类，更新UI：

  1. HWIDCardScanBiz.I().startIDCardScanActivity(context, new HWIDCardScanBiz.IDCardScanCallback() {
  2.     @Override
  3.     public void onIDCardResult(IDCardInfo result) {
  4.         /*
  5. result.name: 姓名
  6. result.sex：性别
  7. result.nation：国籍
  8. result.birthday：生日
  9. result.address：地址
  10. result.idNum：身份证号
  11. result.validDate：有效期
  12.          */
  13.     }
  14. });

二、使用百度云SDK实现身份证识别：

说明：免费额度个人帐户每月1千次/企业帐户每月2千次，要联网。

1.添加配置：
(1)AndroidManifest.xml添加权限：

  1. <uses-permission android:name="android.permission.INTERNET" />
  2. <uses-permission android:name="android.permission.CAMERA"/>
  3. <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
  4. <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
  5.  
  6. <uses-feature android:name="android.hardware.camera" />
  7. <uses-feature android:name="android.hardware.camera.autofocus" />
(2)proguard-rules.pro添加混淆例外：

  1. -keep class com.baidu.ocr.sdk.**{*;}
  2. -dontwarn com.baidu.ocr.**
(3)将ocrsdk.aar放入工程\app\libs目录下。

(4)从以下地址(控制台-公有云-应用列表-进入某个应用详情页)下载aip-ocr.license放入工程\app\src\main\assets下：

https://console.bce.baidu.com/ai/#/ai/ocr/app/detail~appId=4571869
(5)将ocr_ui模块工程放入工程根目录下，在settings.gradle中添加导入模块工程的配置：

include ':app', 'ocrsdk', 'ocr_ui'
(6)工程/app/build.gradle，导入ocrsdk.aar与ocr_ui模块工程：

  1. //...省略之前配的其他地址
  2. repositories {
  3.     flatDir {
  4.         dirs 'libs'
  5.     }
  6. }
  7. dependencies {
  8.     //...省略之前配的其他地址
  9.     implementation(name: 'ocrsdk', ext: 'aar')
  10.     implementation project(path: ':ocr_ui')
  11. }
2.调用代码实现身份证识别：
第1步：调用SDK方法获取token；
第2步：调用SDK方法打开身份证识别界面；
第3步，在调用的Activity的onActivityResult中调用SDK识别图片中的身份信息。

身份证SDK业务类：

  1. public class IDCardScanBiz {
  2.     public static final int REQUEST_CODE_CAMERA = 100;
  3.     private boolean mHasGotToken;
  4.     private static IDCardScanBiz I;
  5.  
  6.  
  7.     public static IDCardScanBiz I() {
  8.         if (I == null) {
  9.             I = new IDCardScanBiz();
  10.         }
  11.         return I;
  12.     }
  13.  
  14.     /**
  15.      * 第1步，调用此方法获取token
  16.      */
  17.     public void initToken() {
  18.         OCR.getInstance(ExampleApplication.Companion.getContext()).initAccessTokenWithAkSk(new OnResultListener() {
  19.             @Override
  20.             public void onResult(Object o) {
  21.                 Log.i("BDIDCard", "getAccessToken onResult >>> o: " + o.toString());
  22.                 mHasGotToken = true;
  23.                 init();
  24.             }
  25.  
  26.             @Override
  27.             public void onError(OCRError error) {
  28.                 Log.i("BDIDCard", "getAccessToken onError >>> error: " + error.toString());
  29.                 // 调用失败，返回OCRError子类SDKError对象
  30.             }
  31.         }, ExampleApplication.Companion.getContext(), "gPxzwMwJVfENiggqd6csyE85", "hcTVlJYj8sKGEgWngy8Qmp83mNxVqp8O");
  32.     }
  33.  
  34.  
  35.     /**
  36.      * 初始化本地质量控制模型
  37.      */
  38.     private void init() {
  39.         Context context = ExampleApplication.Companion.getContext();
  40.         CameraNativeHelper.init(context, OCR.getInstance(context).getLicense(), (errorCode, e) -> Log.i("BDIDCard", "init onError >>> errorCode: " + errorCode));
  41.     }
  42.  
  43.     /**
  44.      * 第2步：调用此方法打开身份证识别界面
  45.      */
  46.     public void startIDCardScanActivity(Activity act) {
  47.         if (!mHasGotToken) return;
  48.         Intent intent = new Intent(act, CameraActivity.class);
  49.         intent.putExtra(CameraActivity.KEY_OUTPUT_FILE_PATH, getSaveFile().getAbsolutePath());
  50.         intent.putExtra(CameraActivity.KEY_NATIVE_ENABLE, true);
  51.         intent.putExtra(CameraActivity.KEY_NATIVE_MANUAL, true);
  52.         intent.putExtra(CameraActivity.KEY_CONTENT_TYPE, CameraActivity.CONTENT_TYPE_ID_CARD_FRONT);
  53.         act.startActivityForResult(intent, REQUEST_CODE_CAMERA);
  54.     }
  55.  
  56.     /**
  57.      * 第3步，在onActivityResult中调此方法，调用百度云API获取照片中的身份证信息
  58.      */
  59.     public void readIDCard() {
  60.         if (!mHasGotToken) return;
  61.         String filePath = getSaveFile().getAbsolutePath();
  62.         IDCardParams param = new IDCardParams();
  63.         param.setImageFile(new File(filePath));
  64.         // 设置身份证正反面
  65.         param.setIdCardSide(IDCardParams.ID_CARD_SIDE_FRONT);
  66.         // 设置方向检测
  67.         param.setDetectDirection(true);
  68.         // 设置图像参数压缩质量0-100, 越大图像质量越好但是请求时间越长。 不设置则默认值为20
  69.         param.setImageQuality(20);
  70.         param.setDetectRisk(true);
  71.         OCR.getInstance(ExampleApplication.Companion.getContext()).recognizeIDCard(param, new OnResultListener<IDCardResult>() {
  72.             @Override
  73.             public void onResult(IDCardResult result) {
  74.                 Log.i("BDIDCard", "recIDCard result >>> result: " + result.toString());
  75.                 if (result != null) {//获取身份信息
  76.                 }
  77.             }
  78.  
  79.             @Override
  80.             public void onError(OCRError error) {
  81.                 Log.i("BDIDCard", "recIDCard result >>> error: " + error.toString());
  82.             }
  83.         });
  84.     }
  85.  
  86.     public static File getSaveFile() {
  87.         File file = new File(ExampleApplication.Companion.getContext().getFilesDir(), "pic.jpg");
  88.         return file;
  89.     }
  90. }

调用业务类的Activity：

  1. class MainActivity : Activity() {
  2.  
  3.     override fun onCreate(savedInstanceState: Bundle?) {
  4.         super.onCreate(savedInstanceState)
  5.         setContentView(R.layout.activity_main)
  6.         var ps = arrayOf(Manifest.permission.CAMERA, Manifest.permission.WRITE_EXTERNAL_STORAGE, Manifest.permission.READ_EXTERNAL_STORAGE)
  7.         ActivityCompat.requestPermissions(this, ps, 100);
  8.         IDCardScanBiz.I().initToken()
  9.     }
  10.  
  11.     fun onScanClick(v: View) {
  12.         IDCardScanBiz.I().startIDCardScanActivity(this)
  13.     }
  14.  
  15.     override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
  16.         super.onActivityResult(requestCode, resultCode, data)
  17.         if (requestCode == IDCardScanBiz.REQUEST_CODE_CAMERA && resultCode == RESULT_OK) {
  18.             IDCardScanBiz.I().readIDCard()
  19.         }
  20.     }
  21.  
  22. }

三、使用百度云API实现身份证识别：

说明：免费额度个人帐户每月1千次/企业帐户每月2千次，要联网。

1.AndroidManifest.xml添加权限：

同上面两种

2.调用代码实现身份证识别：
第1步，调用百度API获取token：

  1. public static String getToken() {
  2.         String url = "https://aip.baidubce.com/oauth/2.0/token?client_id=" + Config.CLIENT_ID + "&client_secret=" + Config.CLIENT_SECRET + "&grant_type=client_credentials";
  3.         if (!NetHelp.getCurConnectStatus()) {
  4.             return null;
  5.         }
  6.         Response response = null;
  7.         try {
  8.             Request request = new Request.Builder().url(url).get().build();
  9.             LogUtils.d("getToken request url :" + url);
  10.             response = httpClient.newCall(request).execute();
  11.         } catch (IOException e) {
  12.             LogUtils.d("getToken request exception: " + e.getMessage());
  13.             e.printStackTrace();
  14.             return null;
  15.         }
  16.         LogUtils.d("getToken response isSuccessful: " + response.isSuccessful());
  17.         if (response != null && response.isSuccessful()) {
  18.             try {
  19.                 String strRecData = response.body().string();
  20.                 LogUtils.d("getToken response body: " + strRecData);
  21.                 if (strRecData != null && strRecData.length() > 2) {
  22.                     JSONObject jsonObj = new JSONObject(strRecData);
  23.                     if (jsonObj != null && !jsonObj.isNull("access_token")) {
  24.                         return jsonObj.getString("access_token");
  25.                     }
  26.                 }
  27.                 return response.body().string();
  28.             } catch (Exception e) {
  29.                 LogUtils.d("getToken response parse exception: " + e.getMessage());
  30.                 e.printStackTrace();
  31.                 return null;
  32.             }
  33.         }
  34.         return null;
  35.     }

第2步，调用系统相机拍身份证照片（可以自已实现带身份证头像框的拍照功能，界面更加美观）：

  1.     /**
  2.      * 调起系统相机进行拍照，此步可以自已实现拍照功能，界面更美观
  3.      */
  4.     public void startIDCardScanActivity(Activity act) {
  5.         Log.i("IDCard", "IDCard startIDCardScanActivity >>>");
  6.         Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
  7.         if (intent.resolveActivity(act.getPackageManager()) != null) {
  8.             act.startActivityForResult(intent, REQUEST_CODE_CAMERA);
  9.         }
  10.     }

第3步，在onActivityResult中，将图片上传百度API获取身份证信息：

  1.     /**
  2.      * 解析身份证图片，获取身份信息
  3.      */
  4.     public void handlerData(Activity act, Intent data, IDCardScanCallback callback) {
  5.         new Thread() {
  6.             @Override
  7.             public void run() {
  8.                 Bundle bundle = data.getExtras();
  9.                 Log.i("IDCard", "IDCard handlerData bundle >>> : " + bundle);
  10.                 if (bundle == null) return;
  11.                 Bitmap bitmap = (Bitmap) bundle.get("data");
  12.                 Log.i("IDCard", "IDCard handlerData bitmap >>> : " + bitmap);
  13.                 if (bitmap == null) return;
  14.                 File file = new File(App.getContext().getCacheDir(), System.currentTimeMillis() + ".jpeg");
  15.                 if (!file.getParentFile().exists()) file.mkdirs();
  16.                 try {
  17.                     FileOutputStream out = new FileOutputStream(file);
  18.                     bitmap.compress(Bitmap.CompressFormat.JPEG, 80, out);
  19.                     out.flush();
  20.                     out.close();
  21.                     Log.i("IDCard", "IDCard saveBitmap  filePath: " + file.getAbsolutePath() + "  fileLen: " + file.length());
  22.                 } catch (IOException ex) {
  23.                     ex.printStackTrace();
  24.                 }
  25.                 String filePath = file.getAbsolutePath();
  26.                 Log.i("IDCard", "IDCard parseImage >>>  filePath: " + filePath);
  27.                 final IDCardInfo info = HttpHelp.getIDCard(new File(filePath));
  28.                 if (info != null && callback != null) {
  29.                     act.runOnUiThread(() -> callback.onIDCardResult(info));
  30.                 }
  31.             }
  32.         }.start();
  33.     }
  34.  
  35.     public static IDCardInfo getIDCard(File file){
  36.         if (!NetHelp.getCurConnectStatus() || file == null || file.length() <= 0){
  37.             return null;
  38.         }
  39.         String accessToken = getToken();
  40.         if (TextUtils.isEmpty(accessToken)) return null;
  41.         String url = "https://aip.baidubce.com/rest/2.0/ocr/v1/idcard?access_token=" + accessToken;
  42.         String img = null;
  43.         try {
  44.             img = FileUtils.base64File(file);
  45.         } catch (Exception e) {
  46.             e.printStackTrace();
  47.         }
  48.         if (TextUtils.isEmpty(img)) return null;
  49.         Response response = null;
  50.         try {
  51.             FormBody.Builder builder = new FormBody.Builder()
  52.                     .add("id_card_side", "front")
  53.                     .add("image", img);
  54.             Request request = new Request.Builder()
  55.                     .url(url)
  56.                     .post(builder.build())
  57.                     .build();
  58.             LogUtils.d("getIDCard request url :" + url + "   img: " + img);
  59.             response = httpClient.newCall(request).execute();
  60.         } catch (IOException e) {
  61.             LogUtils.d("getIDCard request exception: " + e.getMessage());
  62.             e.printStackTrace();
  63.             return null;
  64.         }
  65.         LogUtils.d("getIDCard response isSuccessful: " + response.isSuccessful());
  66.         if (response != null && response.isSuccessful()) {
  67.             try {
  68.                 String strRecData = response.body().string();
  69.                 LogUtils.d("getIDCard response body: " + strRecData);
  70.                 if (strRecData != null && strRecData.length() > 2) {
  71.                     JSONObject rootObj = new JSONObject(strRecData);
  72.                     if (rootObj != null && !rootObj.isNull("words_result")) {
  73.                         JSONObject wordObj = rootObj.getJSONObject("words_result");
  74.                         IDCardInfo info = new IDCardInfo();
  75.                         if (!wordObj.isNull("姓名") && !wordObj.getJSONObject("姓名").isNull("words")) {
  76.                             info.name = wordObj.getJSONObject("姓名").getString("words");
  77.                         }
  78.                         if (wordObj != null && !wordObj.isNull("民族") && !wordObj.getJSONObject("民族").isNull("words")) {
  79.                             info.nation = wordObj.getJSONObject("民族").getString("words");
  80.                         }
  81.                         if (wordObj != null && !wordObj.isNull("住址") && !wordObj.getJSONObject("住址").isNull("words")) {
  82.                             info.address = wordObj.getJSONObject("住址").getString("words");
  83.                         }
  84.                         if (wordObj != null && !wordObj.isNull("公民身份号码") && !wordObj.getJSONObject("公民身份号码").isNull("words")) {
  85.                             info.idNum = wordObj.getJSONObject("公民身份号码").getString("words");
  86.                         }
  87.                         if (wordObj != null && !wordObj.isNull("出生") && !wordObj.getJSONObject("出生").isNull("words")) {
  88.                             info.birthday = wordObj.getJSONObject("出生").getString("words");
  89.                         }
  90.                         if (wordObj != null && !wordObj.isNull("性别") && !wordObj.getJSONObject("性别").isNull("words")) {
  91.                             info.sex = wordObj.getJSONObject("性别").getString("words");
  92.                         }
  93.                         LogUtils.d("getIDCard response parse IDCardInfo: " + info.toString());
  94.                         return info;
  95.                     }
  96.                 }
  97.             } catch (Exception e) {
  98.                 LogUtils.d("getIDCard response parse exception: " + e.getMessage());
  99.                 e.printStackTrace();
  100.                 return null;
  101.             }
  102.         }
  103.         return null;
  104.     }
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