2.4 适配 qualcomm:mc50 PDA 广播模式

app/build.gradle

@@ -3,7 +3,7 @@ plugins {
 }
 
 android {
-    compileSdk 30
+    compileSdk 28
     buildToolsVersion '30.0.3'
 
     defaultConfig {
@@ -11,7 +11,7 @@ android {
         minSdk 28
         targetSdk 28
         versionCode 1
-        versionName "1.15"
+        versionName "2.4"
 
         // 1.0 IDATA广播模式处理
         // 1.1 霍尼韦尔的监听修改（扫描网站二维码跳出程序，监听失效，调整）、斑马PDA广播模式设置
@@ -29,6 +29,14 @@ android {
         // 1.13 新大陆pda 兼容广播模式；NLS-NFT10
         // 1.14 瑞芯 rk3566_r 添加引用 librockchip.so； 新加一个方法，返回当前PDA的厂家和型号
         // 1.15 系统状态栏根据配置进行设置
+        // 1.16 idata pda 不设置模式
+        // 1.17 霍尼韦尔EDA51、EDA50P，调用扫描枪的方法，在关闭的时候停止调用扫描枪
+        // 1.18 瑞兴平板，读取扫描结果，使用同步加锁模式
+        // 1.19 index页面接入初始化数据
+        // 2.1 注册PDA的信息存储到文件内部，采取mac+固定加密串的MD5加密校验
+        // 2.2 安卓14以上，无法获取mac地址，修改成获取唯一id作为mac地址
+        // 2.3 适配IOT_Device:sc55g PDA 广播模式
+        // 2.4 适配 qualcomm:mc50 PDA 广播模式
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
         ndk {
             abiFilters 'armeabi-v7a'
@@ -80,7 +88,7 @@ android {
     }*/
 }
 dependencies {
-    compileOnly 'com.symbol:emdk:+'
+    compileOnly 'com.symbol:emdk:9.1.1'
     implementation 'androidx.appcompat:appcompat:1.2.0'
     implementation 'com.google.android.material:material:1.2.1'
     implementation 'com.google.code.gson:gson:2.6.2'

app/src/main/assets/demo/index.html

@@ -99,20 +99,6 @@
 
 
     </style>
-    <script>
-        function saveSetting(){
-           var data=JSON.stringify({
-          "address":document.getElementById('address').value,
-          "port":document.getElementById('port').value,
-          "path":document.getElementById('path').value,
-          "screen_rotation":document.getElementById('screen_rotation').value,
-          "hide_bar":document.getElementById('hide_bar').value
-         });
-         window.NetworkSettingEngine.saveSetting(data);
-         window.View.reload();
-        }
-
-    </script>
 
 </head>
 
@@ -148,4 +134,35 @@
     </div>
 </div>
 </body>
+<script>
+
+    function init() {
+        var dstr = window.NetworkSettingEngine.getStringSetting();
+        if (dstr.length > 0) {
+            var d = JSON.parse(dstr);
+            document.getElementById('address').value = d.address;
+            document.getElementById('port').value = d.port;
+            document.getElementById('path').value = d.path;
+            document.getElementById('screen_rotation').value = d.screen_rotation;
+            document.getElementById('hide_bar').value = d.hide_bar;
+            console.log("d_data_end_=========================");
+        }
+    }
+
+    init();
+
+    function saveSetting(){
+       var data=JSON.stringify({
+      "address":document.getElementById('address').value,
+      "port":document.getElementById('port').value,
+      "path":document.getElementById('path').value,
+      "screen_rotation":document.getElementById('screen_rotation').value,
+      "hide_bar":document.getElementById('hide_bar').value
+     });
+     window.NetworkSettingEngine.saveSetting(data);
+     window.View.reload();
+    }
+
+</script>
+
 </html>

app/src/main/java/chaoran/business/BrandEnum.java

@@ -10,6 +10,8 @@ package chaoran.business;
 
 public enum BrandEnum {
     //枚举名即为valueOf()
+    QUALCOMM("qualcomm", "qualcomm"),
+    IOT_DEVICE("新大陆", "iot_device"),
     NEW_LAND("新大陆", "newland"),
     HISENSE("海信", "hisense"),
     UROVO("DT50 Lite", "urovo"),
@@ -44,7 +46,7 @@ public enum BrandEnum {
             code = new String();
         }
         for (BrandEnum brandEnum : values()) {
-            if (brandEnum.code.equals(code.toLowerCase())) {
+            if (brandEnum.code.equalsIgnoreCase(code)) {
                 return brandEnum;
             }
         }

app/src/main/java/chaoran/business/activity/MainActivity.java

@@ -6,6 +6,7 @@ import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
 import android.content.pm.ActivityInfo;
+import android.content.res.AssetManager;
 import android.content.res.Configuration;
 import android.graphics.Bitmap;
 import android.hardware.Sensor;
@@ -16,6 +17,7 @@ import android.media.MediaPlayer;
 import android.os.Build;
 import android.os.Bundle;
 import android.os.Vibrator;
+import android.util.JsonReader;
 import android.util.Log;
 import android.view.Menu;
 import android.view.MenuItem;
@@ -32,13 +34,19 @@ import androidx.appcompat.app.ActionBar;
 import androidx.appcompat.app.AppCompatActivity;
 
 import com.google.gson.Gson;
+import com.google.gson.reflect.TypeToken;
 
+import java.io.BufferedReader;
 import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.util.HashMap;
 import java.util.Map;
 
 import chaoran.business.BrandEnum;
 import chaoran.business.R;
 import chaoran.business.adapter.*;
+import chaoran.business.engine.entity.NetworkSetting;
 import chaoran.business.engine.impl.NetworkSettingEngine;
 import chaoran.business.engine.SettingEngine;
 import chaoran.business.engine.impl.TekVoiceEngine;
@@ -62,8 +70,6 @@ public class MainActivity extends AppCompatActivity implements ResultListener{
 
     MyOrientationDetector myOrientationDetector;
 
-    private static int latestOrientation = 0; // 添加一个标志位；最后屏幕的方向
-
     private WebView webView;
     private Adapter adapter;
     private VoiceEngine voiceEngine;
@@ -86,6 +92,25 @@ public class MainActivity extends AppCompatActivity implements ResultListener{
 
     }
 
+    public static String readInitFile(Context context) {
+        StringBuffer init = new StringBuffer();
+        try {
+        AssetManager assetManager = context.getAssets();
+            // 打开文件输入流
+            InputStream inputStream = assetManager.open("init.json");
+            // 使用BufferedReader进行逐行读取
+            BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));
+            String line;
+            while ((line = reader.readLine()) != null) {
+                init.append(line);
+            }
+            reader.close();
+        } catch (IOException e) {
+            Log.e("AssetError", "Failed to read asset file: init.json", e);
+        }
+        return init.toString();
+    }
+
     private void initData() {
         BrandEnum brand = BrandEnum.code(Build.MANUFACTURER);
         Toast.makeText(this, Build.MANUFACTURER, Toast.LENGTH_LONG).show();
@@ -139,6 +164,12 @@ public class MainActivity extends AppCompatActivity implements ResultListener{
             case NEW_LAND:
                 adapter = new NewlandAdapter(this, this);
                 break;
+            case IOT_DEVICE:
+                adapter = new IOT_DeviceAdapter(this, this);
+                break;
+            case QUALCOMM:
+                adapter = new QualcommAdapter(this, this);
+                break;
         }
         if (null != adapter) {
             adapter.start();
@@ -305,8 +336,35 @@ public class MainActivity extends AppCompatActivity implements ResultListener{
     private String url() {
         SharedPreferences spf = this.getSharedPreferences("crtech", Context.MODE_PRIVATE);
         Integer port = spf.getInt("port", -1);
+        Map<String, Object> map = null;
         if (port == -1) {
-            return "file:///android_asset/demo/index.html";
+            try {
+//                String init = readInitFile(this);
+                String init = null;
+                if (init != null && init.length() > 0) {
+                    Gson gson = new Gson();
+                    map = gson.fromJson(init, new TypeToken<Map<String, Object>>(){}.getType());
+                    // 说明采取了配置，并且存在ip才认为是一个合法的json配置
+                    if (map.containsKey("ip") && map.get("ip").toString().length() > 0) {
+                        NetworkSetting initData = new NetworkSetting();
+                        initData.setAddress(map.get("ip").toString());
+                        initData.setPort(Integer.parseInt(map.get("port").toString()));
+                        initData.setPath(map.get("path").toString());
+                        initData.setScreen_rotation(Integer.parseInt(map.getOrDefault("screen_rotation", "3").toString()));
+                        initData.setHide_bar(Integer.parseInt(map.getOrDefault("hide_bar", "3").toString()));
+                        settingEngine.saveSetting(initData);
+                        spf = this.getSharedPreferences("crtech", Context.MODE_PRIVATE);
+                        port = initData.getPort();
+                    }else {
+                        map = null;
+                    }
+                }
+            }catch (Exception e) {
+                Log.e("MainActivity", "get init file error");
+            }
+            if (map == null) {
+                return "file:///android_asset/demo/index.html";
+            }
         }
         String address = spf.getString("address", "").replaceAll(" ", "");
         String path = spf.getString("path", "").replaceAll(" ", "");
@@ -416,13 +474,11 @@ public class MainActivity extends AppCompatActivity implements ResultListener{
             if (SCREEN_ROTATION == 1 || SCREEN_ROTATION == 3) {
                 if (rotate == ActivityInfo.SCREEN_ORIENTATION_PORTRAIT || rotate == ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT) {
                     activity.setRequestedOrientation(rotate);
-                    latestOrientation = rotate;
                 }
             }
             if (SCREEN_ROTATION == 2 || SCREEN_ROTATION == 3) {
                 if (rotate == ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE || rotate == ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE) {
                     activity.setRequestedOrientation(rotate);
-                    latestOrientation = rotate;
                 }
             }
         }
@@ -431,69 +487,6 @@ public class MainActivity extends AppCompatActivity implements ResultListener{
 
     }
 
-    /*class MyOrientationDetector implements SensorEventListener {
-
-        private Activity activity;
-
-        public MyOrientationDetector(Activity activity) {
-            this.activity = activity;
-            Sensor orientationSensor = sensorManager.getDefaultSensor(Sensor.TYPE_ORIENTATION);
-            sensorManager.registerListener(this, orientationSensor, SensorManager.SENSOR_DELAY_NORMAL);
-        }
-
-        @Override
-        public void onSensorChanged(SensorEvent event) {
-
-            int angle = ((WindowManager) activity.getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay().getRotation();
-            if (latestOrientation == angle) {
-                return;
-            }
-            if (SCREEN_ROTATION == 1) {
-                if (Surface.ROTATION_0 == angle) {
-                    activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
-                    latestOrientation = angle;
-                }else if (Surface.ROTATION_180 == angle) {
-                    activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT);
-                    latestOrientation = angle;
-                }
-                return;
-            }else if (SCREEN_ROTATION == 2) {
-                if (Surface.ROTATION_90 == angle) {
-                    activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
-                    latestOrientation = angle;
-                }else if (Surface.ROTATION_270 == angle) {
-                    activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE);
-                    latestOrientation = angle;
-                }
-                return;
-            }
-            int tmpAngle = latestOrientation;
-            latestOrientation = angle;
-            switch (angle) {
-                case Surface.ROTATION_0:
-                    activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
-                    break;
-                case Surface.ROTATION_90:
-                    activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
-                    break;
-                case Surface.ROTATION_180:
-                    activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT);
-                    break;
-                case Surface.ROTATION_270:
-                    activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE);
-                    break;
-                default:
-                    latestOrientation = tmpAngle;
-                    break;
-            }
-        }
-
-        @Override
-        public void onAccuracyChanged(Sensor sensor, int accuracy) {
-
-        }
-    }*/
-
     @SuppressLint("WrongConstant")
     @Override
     public void onConfigurationChanged(Configuration newConfig) {

app/src/main/java/chaoran/business/adapter/HoneywellEda56Adapter.java

@@ -8,6 +8,10 @@ import android.content.IntentFilter;
 import chaoran.business.activity.ResultListener;
 import chaoran.business.strategy.Strategy;
 
+/**
+ * 23-6-13 霍尼韦尔EDA56使用
+ * 25-1-14 兰陵县人民医院 测试可以使用（唐圆圆）
+ */
 public class HoneywellEda56Adapter implements Adapter {
     private Context context;
     private ResultListener resultListener;

app/src/main/java/chaoran/business/adapter/IDataAdapter.java

@@ -39,7 +39,7 @@ public class IDataAdapter implements Adapter {
 
         public Receiver() {
             scannerInerface = new ScannerInerface(context);
-            scannerInerface.setOutputMode(1);
+//            scannerInerface.setOutputMode(1);
         }
 
         @Override

app/src/main/java/chaoran/business/adapter/IOT_DeviceAdapter.java

@@ -0,0 +1,56 @@
+package chaoran.business.adapter;
+
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+
+import chaoran.business.activity.ResultListener;
+import chaoran.business.strategy.Strategy;
+
+/**
+ * 适配 sc55g
+ */
+public class IOT_DeviceAdapter implements Adapter {
+    private Context context;
+    private ResultListener resultListener;
+    private Strategy strategy;
+
+
+    public IOT_DeviceAdapter(Context context, ResultListener resultListener) {
+        this.context = context;
+        this.resultListener = resultListener;
+        strategy = new Receiver();
+    }
+
+    @Override
+    public void start() {
+        strategy.executeStrategy(resultListener);
+    }
+
+    @Override
+    public void stop() {
+        strategy.exclusiveStrategy();
+    }
+
+    public class Receiver extends BroadcastReceiver implements Strategy {
+
+        @Override
+        public void onReceive(Context context, Intent intent) {
+            resultListener.result(intent.getStringExtra("message"));
+        }
+
+        @Override
+        public void executeStrategy(ResultListener resultListener) {
+            IntentFilter filter = new IntentFilter();
+            filter.addAction("com.speedata.showdecodedata");
+            filter.setPriority(2);
+            context.registerReceiver(this, filter);
+        }
+
+        @Override
+        public void exclusiveStrategy() {
+            context.unregisterReceiver(this);
+        }
+    }
+}

app/src/main/java/chaoran/business/adapter/QualcommAdapter.java

@@ -0,0 +1,56 @@
+package chaoran.business.adapter;
+
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+
+import chaoran.business.activity.ResultListener;
+import chaoran.business.strategy.Strategy;
+
+/**
+ * 适配 mc50
+ */
+public class QualcommAdapter implements Adapter {
+    private Context context;
+    private ResultListener resultListener;
+    private Strategy strategy;
+
+
+    public QualcommAdapter(Context context, ResultListener resultListener) {
+        this.context = context;
+        this.resultListener = resultListener;
+        strategy = new Receiver();
+    }
+
+    @Override
+    public void start() {
+        strategy.executeStrategy(resultListener);
+    }
+
+    @Override
+    public void stop() {
+        strategy.exclusiveStrategy();
+    }
+
+    public class Receiver extends BroadcastReceiver implements Strategy {
+
+        @Override
+        public void onReceive(Context context, Intent intent) {
+            resultListener.result(intent.getStringExtra("data"));
+        }
+
+        @Override
+        public void executeStrategy(ResultListener resultListener) {
+            IntentFilter filter = new IntentFilter();
+            filter.addAction("com.scanner.broadcast");
+            filter.setPriority(2);
+            context.registerReceiver(this, filter);
+        }
+
+        @Override
+        public void exclusiveStrategy() {
+            context.unregisterReceiver(this);
+        }
+    }
+}

app/src/main/java/chaoran/business/adapter/RockChipAdapter.java

@@ -9,10 +9,6 @@ package chaoran.business.adapter;
 
 
 import android.content.Context;
-import android.media.AudioManager;
-import android.media.SoundPool;
-import android.os.Vibrator;
-import chaoran.business.R;
 import chaoran.business.activity.ResultListener;
 import chaoran.business.strategy.Strategy;
 
@@ -83,16 +79,21 @@ public class RockChipAdapter implements Adapter {
                 while (running) {
                     String data = data();
                     if (!data.equals("")) {
-                        barcode[0] = barcode[0] + data;
+                        synchronized (RockChipAdapter.class) {
+                            barcode[0] = barcode[0] + data;
+                        }
                         try {
                             Thread.sleep(20);
                         } catch (InterruptedException e) {
                             e.printStackTrace();
                         }
                     }
-                    if (!"".equals(barcode[0])) {
-                        resultListener.result(barcode[0]);
-                        barcode[0] = "";
+                    synchronized (RockChipAdapter.class) {
+                        if (!"".equals(barcode[0])) {
+//                            Log.i("listen", "Thread result data: \t\t" + barcode[0] + "\t\t" + System.currentTimeMillis());
+                            resultListener.result(barcode[0]);
+                            barcode[0] = "";
+                        }
                     }
                 }
             }).start();
@@ -105,16 +106,21 @@ public class RockChipAdapter implements Adapter {
         }
 
         private String data() {
-            if (mFileInputStream == null) return "";
-            try {
-                int size = mFileInputStream.available();
-                byte[] buffer = new byte[size];
-                size = mFileInputStream.read(buffer);
-                if (size > 0) {
-                    return new String(buffer);
+            if (mFileInputStream == null) {
+                return "";
+            }
+            synchronized (RockChipAdapter.class) {
+                try {
+                    int size = mFileInputStream.available();
+                    byte[] buffer = new byte[size];
+                    size = mFileInputStream.read(buffer);
+                    if (size > 0) {
+                        String data = new String(buffer);
+                        return data;
+                    }
+                } catch (IOException e) {
+                    e.printStackTrace();
                 }
-            } catch (IOException e) {
-                e.printStackTrace();
             }
             return "";
         }

app/src/main/java/chaoran/business/engine/impl/NetworkSettingEngine.java

@@ -45,6 +45,7 @@ public class NetworkSettingEngine implements SettingEngine {
         networkSetting.setPort(port);
         networkSetting.setPath(path);
         networkSetting.setScreen_rotation(screen_rotation);
+        networkSetting.setHide_bar(spf.getInt("hide_bar", 3));
         return networkSetting;
     }
 

app/src/main/java/chaoran/business/service/ScanServiceEDA50P.java

@@ -57,7 +57,8 @@ public class ScanServiceEDA50P extends Service
         super.onCreate();
         notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
         NotificationChannel channel = null;
-        if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) { //适配9.0service
+        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) { //适配9.0service
+//        if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) { //适配9.0service
             channel = new NotificationChannel(notificationId, notificationName, NotificationManager.IMPORTANCE_HIGH);
             notificationManager.createNotificationChannel(channel);
             Notification notification = new Notification.Builder(getApplicationContext(), notificationId).build();
@@ -78,9 +79,11 @@ public class ScanServiceEDA50P extends Service
     //Service被关闭之前回调
     @Override
     public void onDestroy() {
-        Log.i(TAG, "onDestory方法被调用!");
+        Log.i(TAG, "onDestroy方法被调用!");
         super.onDestroy();
-
+        if (mBarcodeReader != null) {
+            mBarcodeReader.release();
+        }
         if (this.mInternalScannerReader != null) {
             this.mInternalScannerReader.removeBarcodeListener(this);
             this.mInternalScannerReader.removeTriggerListener(this);

app/src/main/java/chaoran/business/utils/LocalAddressUtil.java

@@ -1,11 +1,16 @@
 package chaoran.business.utils;
 
+import static androidx.core.content.ContextCompat.getSystemService;
+
 import android.annotation.SuppressLint;
 import android.app.Activity;
-import android.bluetooth.le.ScanSettings;
 import android.content.Context;
+import android.content.SharedPreferences;
 import android.content.pm.ActivityInfo;
+import android.net.wifi.WifiInfo;
+import android.net.wifi.WifiManager;
 import android.os.Build;
+import android.provider.Settings;
 import android.util.Log;
 import android.view.Surface;
 import android.view.View;
@@ -18,13 +23,12 @@ import java.net.NetworkInterface;
 import java.net.SocketException;
 import java.util.Enumeration;
 
-import chaoran.business.BrandEnum;
 import chaoran.business.BuildConfig;
-import chaoran.business.R;
-import chaoran.business.activity.MainActivity;
 
 public class LocalAddressUtil {
 
+    public final static String SSO_KEY = "!~CROP@CRTECH@PDA~!";
+
     private Context context;
 
     private Activity activity;
@@ -63,6 +67,14 @@ public class LocalAddressUtil {
     @SuppressLint("JavascriptInterface")
     @JavascriptInterface
     public String getMacAddress(){//可以兼容安卓7以下
+        if (Build.VERSION.SDK_INT >= 34) { // Android 14 is code-named Tiramisu
+            try {
+                return Settings.Secure.getString(context.getContentResolver(), Settings.Secure.ANDROID_ID);
+            }catch (Exception e) {
+                e.printStackTrace();
+                return "02:00:00:00:00:02";
+            }
+        }
         String macAddress = null;
         StringBuffer buf = new StringBuffer();
         NetworkInterface networkInterface = null;
@@ -160,6 +172,32 @@ public class LocalAddressUtil {
         }
     }
 
+    @SuppressLint("JavascriptInterface")
+    @JavascriptInterface
+    public String registerMac(String applyMac) {
+        try {
+            String mac = this.getMacAddress();
+            String md5Hash = MD5.md5(mac + SSO_KEY);
+            if (md5Hash != null && md5Hash.equals(applyMac)) {
+                // 将允许注册适配的mac写入文件中
+                SharedPreferences.Editor editor = context.getSharedPreferences("CrtechPdaConfig", Context.MODE_PRIVATE).edit();
+                editor.putString("checkMac", "success");
+                editor.commit();
+                return "success";
+            }
+        }catch (Exception ignored) {
+
+        }
+        return "error";
+    }
+
+    @SuppressLint("JavascriptInterface")
+    @JavascriptInterface
+    public String checkMacRegister() {
+        SharedPreferences sharedPreferences = context.getSharedPreferences("CrtechPdaConfig", Context.MODE_PRIVATE);
+        return sharedPreferences.getString("checkMac", "error");
+    }
+
     @SuppressLint("JavascriptInterface")
     @JavascriptInterface
     public String getApkVersion() {

app/src/main/java/chaoran/business/utils/MD5.java

@@ -0,0 +1,34 @@
+package chaoran.business.utils;
+
+import java.security.MessageDigest;
+
+// 从框架的MD5加密类拷贝过来的
+public class MD5 {
+    private static final String key = "aa";
+    private static final char[] hexDigits = new char[]{'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};
+
+    public static final String md5(String s) {
+        return s == null ? null : md5(s.getBytes());
+    }
+
+    public static final String md5(byte[] bytes) {
+        try {
+            MessageDigest mdTemp = MessageDigest.getInstance("MD5");
+            mdTemp.update(bytes);
+            byte[] md = mdTemp.digest();
+            int j = md.length;
+            char[] str = new char[j * 2];
+            int k = 0;
+
+            for(int i = 0; i < j; ++i) {
+                byte byte0 = md[i];
+                str[k++] = hexDigits[byte0 >>> 4 & 15];
+                str[k++] = hexDigits[byte0 & 15];
+            }
+
+            return new String(str);
+        } catch (Exception var8) {
+            return null;
+        }
+    }
+}