优化：修改消费码输入框为密��模式，添加显示/隐藏密码切换功能

app/src/main/java/com/sw/dualscreen/activity/fragment/pay/NumberPayFragment.kt

@@ -1,5 +1,7 @@
 package com.sw.dualscreen.activity.fragment.pay
 
+import android.text.InputType
+import com.sw.dualscreen.R
 import com.sw.dualscreen.activity.PayActivity
 import com.sw.dualscreen.activity.fragment.BaseFragment
 import com.sw.dualscreen.databinding.FragmentNumberPayBinding
@@ -13,6 +15,8 @@ class NumberPayFragment : BaseFragment<FragmentNumberPayBinding>() {
     private lateinit var payActivity: PayActivity
     private var foodName: String? = null
     private var payAmount: Double? = null
+    // 密码是否显示的标志
+    private var isPasswordVisible = false
     override fun inflateViewBinding(): FragmentNumberPayBinding {
         return FragmentNumberPayBinding.inflate(layoutInflater)
     }
@@ -27,6 +31,12 @@ class NumberPayFragment : BaseFragment<FragmentNumberPayBinding>() {
             foodName = it.foodName
             payAmount = (it.specPrice ?: 0.0) * payActivity.eatNum
         }
+
+        // 密码显示/隐藏切换
+        binding.ivTogglePassword.setOnClickListener {
+            togglePasswordVisibility()
+        }
+
         binding.btnConfirm.setOnClickListener { v ->
             val phone = binding.etInputPhone.text.toString().trim()
             val key = binding.etInputNumber.text.toString().trim()
@@ -127,6 +137,30 @@ class NumberPayFragment : BaseFragment<FragmentNumberPayBinding>() {
         }
     }
 
+    // 切换密码显示/隐藏
+    private fun togglePasswordVisibility() {
+        val editText = binding.etInputNumber
+        val imageView = binding.ivTogglePassword
+
+        // 保存当前光标位置
+        val cursorPosition = editText.selectionStart
+
+        if (isPasswordVisible) {
+            // 当前显示，改为隐藏
+            editText.inputType = InputType.TYPE_CLASS_TEXT or InputType.TYPE_TEXT_VARIATION_PASSWORD
+            imageView.setImageResource(R.drawable.ic_eye_close)
+            isPasswordVisible = false
+        } else {
+            // 当前隐藏，改为显示
+            editText.inputType = InputType.TYPE_CLASS_TEXT or InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD
+            imageView.setImageResource(R.drawable.ic_eye_open)
+            isPasswordVisible = true
+        }
+
+        // 恢复光标位置
+        editText.setSelection(cursorPosition)
+    }
+
 //    private fun bindOrder(userId: String, block: () -> Unit) {
 //        payActivity.bindOrder(userId) { bindResult ->
 //            if (bindResult.not()) {