fixed a bug

android/oral-trainer-sdk/src/main/java/cn/learningpad/oraltrainer/sdk/UserApi.kt

@@ -106,7 +106,7 @@ class UserApi internal constructor(
         username: String,
         password: String,
         nickname: String? = null,
-        phone: String? = null,
+        phone: String,
         onComplete: (Result<AuthSession>) -> Unit,
     ): CancellableRequest = submit(onComplete) {
         requestRegisterBlocking(
@@ -234,13 +234,16 @@ class UserApi internal constructor(
         username: String,
         password: String,
         nickname: String?,
-        phone: String?,
+        phone: String,
     ): AuthSession {
+        val cleanedPhone = phone.trim()
+        require(cleanedPhone.isNotEmpty()) { "请填写手机号" }
+        require(PHONE_PATTERN.matches(cleanedPhone)) { "请输入有效的 11 位手机号" }
         val root = JSONObject()
             .put("username", username)
             .put("password", password)
         nickname?.takeIf { it.isNotBlank() }?.let { root.put("nickname", it) }
-        phone?.takeIf { it.isNotBlank() }?.let { root.put("phone", it) }
+        root.put("phone", cleanedPhone)
         val response = request(path, body = root.toString(), method = "POST")
         return parseSession(JSONObject(response))
     }
@@ -385,3 +388,5 @@ data class SsoExchangeResult(
     val phoneBound: Boolean,
     val isNewUser: Boolean,
 )
+
+private val PHONE_PATTERN = Regex("^1[3-9]\\d{9}$")