diff --git a/OpenMico-FOTA_resign/Utils.java b/OpenMico-FOTA_resign/Utils.java
new file mode 100644
index 0000000..15fd3fe
--- /dev/null
+++ b/OpenMico-FOTA_resign/Utils.java
@@ -0,0 +1,167 @@
+package com.xiaomi.mico.romupdate;
+
+import android.annotation.SuppressLint;
+import android.app.ActivityManager;
+import android.content.ComponentName;
+import android.content.Context;
+import android.net.ConnectivityManager;
+import android.net.NetworkInfo;
+import android.os.Build;
+import android.util.Base64;
+import android.util.Pair;
+import com.elvishew.xlog.XLog;
+import java.io.File;
+import java.io.UnsupportedEncodingException;
+import java.lang.reflect.Field;
+import java.math.BigInteger;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+import java.util.ArrayList;
+import java.util.Calendar;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.Iterator;
+import java.util.List;
+
+public class Utils {
+    public static NetworkInfo getActiveNetworkInfo() {
+        ConnectivityManager connectivityManager = (ConnectivityManager) RomUpdateApplication.appContext.getSystemService("connectivity");
+        if (connectivityManager == null) {
+            return null;
+        }
+        return connectivityManager.getActiveNetworkInfo();
+    }
+
+    public static boolean isNetworkAvailable() {
+        NetworkInfo activeNetworkInfo = getActiveNetworkInfo();
+        return activeNetworkInfo != null && activeNetworkInfo.isConnected();
+    }
+
+    public static String getBuildModel() {
+        return Build.MODEL;
+    }
+
+    @SuppressLint({"MissingPermission"})
+    public static String getSn() {
+        return Build.getSerial();
+    }
+
+    public static String getParamHash(String str, String str2, String str3, String str4, String str5, String str6) {
+        ArrayList arrayList = new ArrayList();
+        arrayList.add(new Pair(Constants.PRODUCT_MODEL, str));
+        arrayList.add(new Pair(Constants.CURRENT_ROM_VERSION, str2));
+        arrayList.add(new Pair(Constants.CURRENT_ROM_CHANNEL, str3));
+        arrayList.add(new Pair(Constants.PRODUCT_FILTER_ID, str4));
+        arrayList.add(new Pair(Constants.LOCALE, str5));
+        arrayList.add(new Pair(Constants.TIMESTAMP, str6));
+        Collections.sort(arrayList, new Comparator<Pair<String, String>>() {
+            /* class com.xiaomi.mico.romupdate.Utils.AnonymousClass1 */
+
+            public int compare(Pair<String, String> pair, Pair<String, String> pair2) {
+                return ((String) pair.first).compareTo((String) pair2.first);
+            }
+        });
+        StringBuilder sb = new StringBuilder();
+        Iterator it = arrayList.iterator();
+        boolean z = true;
+        while (it.hasNext()) {
+            Pair pair = (Pair) it.next();
+            if (!z) {
+                sb.append("&");
+            }
+            sb.append((String) pair.first);
+            sb.append("=");
+            sb.append((String) pair.second);
+            z = false;
+        }
+        sb.append("&");
+        sb.append("8007236f-a2d6-4847-ac83-c49395ad6d65");
+        String sb2 = sb.toString();
+        XLog.d("params before hashing: " + sb2);
+        byte[] encode = Base64.encode(getBytes(sb2), 2);
+        XLog.d("params after base64 encoding: " + new String(encode));
+        String md5Digest = getMd5Digest(encode);
+        XLog.d("params md5: " + md5Digest);
+        return md5Digest;
+    }
+
+    public static byte[] getBytes(String str) {
+        try {
+            return str.getBytes("UTF-8");
+        } catch (UnsupportedEncodingException unused) {
+            return str.getBytes();
+        }
+    }
+
+    public static String getMd5Digest(byte[] bArr) {
+        try {
+            MessageDigest instance = MessageDigest.getInstance("MD5");
+            instance.update(bArr);
+            return String.format("%1$032X", new BigInteger(1, instance.digest()));
+        } catch (NoSuchAlgorithmException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    public static String getExternalStoragePath(Context context) {
+        File externalFilesDir = context.getExternalFilesDir(null);
+        if (externalFilesDir == null) {
+            externalFilesDir = context.getFilesDir();
+        }
+        return externalFilesDir.getAbsolutePath();
+    }
+
+    public static String getLogDirectory(Context context) {
+        return getExternalStoragePath(context) + File.separator + "log";
+    }
+
+    public static boolean isEmpty(CharSequence charSequence) {
+        return charSequence == null || charSequence.length() == 0;
+    }
+
+    public static long getMidnightTimeStamp() {
+        Calendar instance = Calendar.getInstance();
+        instance.setTimeInMillis(System.currentTimeMillis());
+        instance.set(11, 0);
+        instance.set(12, 0);
+        instance.set(13, 0);
+        instance.set(14, 0);
+        return instance.getTimeInMillis();
+    }
+
+    public static ActivityManager.RunningAppProcessInfo getTopProcessInfo() {
+        Field field;
+        Integer num;
+        try {
+            field = ActivityManager.RunningAppProcessInfo.class.getDeclaredField("processState");
+        } catch (Exception unused) {
+            field = null;
+        }
+        for (ActivityManager.RunningAppProcessInfo runningAppProcessInfo : ((ActivityManager) RomUpdateApplication.appContext.getSystemService("activity")).getRunningAppProcesses()) {
+            if (runningAppProcessInfo.importance == 100 && runningAppProcessInfo.importanceReasonCode == 0) {
+                try {
+                    num = Integer.valueOf(field.getInt(runningAppProcessInfo));
+                } catch (Exception unused2) {
+                    XLog.e("Exception in getting 'processState' field from ActivityManager.RunningAppProcessInfo.");
+                    num = null;
+                }
+                if (num != null && (num.intValue() == 2 || num.intValue() == 1)) {
+                    XLog.d("Top app process is " + runningAppProcessInfo.processName + ", process state is " + num);
+                    return runningAppProcessInfo;
+                }
+            }
+        }
+        return null;
+    }
+
+    public static ComponentName getCurrentActivity() {
+        List<ActivityManager.RunningTaskInfo> runningTasks = ((ActivityManager) RomUpdateApplication.appContext.getSystemService("activity")).getRunningTasks(1);
+        return new ComponentName(runningTasks.get(0).topActivity.getPackageName(), runningTasks.get(0).topActivity.getClassName());
+    }
+
+    public static boolean currentIsHome() {
+        ComponentName currentActivity = getCurrentActivity();
+        XLog.d("Current component is " + currentActivity.getPackageName() + "/" + currentActivity.getClassName());
+        return "com.xiaomi.micolauncher".equals(currentActivity.getPackageName()) && ("com.xiaomi.micolauncher.Launcher".equals(currentActivity.getClassName()) || "com.xiaomi.micolauncher.module.lockscreen.LockScreenActivity".equals(currentActivity.getClassName()));
+    }
+}