first commit

app/src/main/java/com/example/defenseapplication/login/LoginActivity.kt

@@ -0,0 +1,162 @@
+package com.example.defenseapplication.login
+import android.content.Intent
+import com.example.defenseapplication.R
+import android.os.Bundle
+import android.os.CountDownTimer
+import android.view.View
+import android.widget.Toast
+import androidx.appcompat.app.AppCompatActivity
+import androidx.constraintlayout.widget.ConstraintLayout
+import androidx.constraintlayout.widget.ConstraintSet
+import com.example.defenseapplication.databinding.ActivityLoginBinding
+
+class LoginActivity : AppCompatActivity() {
+
+    private lateinit var binding: ActivityLoginBinding
+    private var currentLoginMode = LoginMode.SMS
+
+    enum class LoginMode { SMS, PASSWORD }
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        binding = ActivityLoginBinding.inflate(layoutInflater)
+        setContentView(binding.root)
+
+        setupTabListeners()
+        setupClickListeners()
+        switchToSmsMode()
+    }
+
+    private fun setupTabListeners() {
+        binding.tvSmsLogin.setOnClickListener {
+            if (currentLoginMode != LoginMode.SMS) {
+                currentLoginMode = LoginMode.SMS
+                switchToSmsMode()
+            }
+        }
+        binding.tvPwdLogin.setOnClickListener {
+            if (currentLoginMode != LoginMode.PASSWORD) {
+                currentLoginMode = LoginMode.PASSWORD
+                switchToPasswordMode()
+            }
+        }
+    }
+
+    private fun switchToSmsMode() {
+        binding.tvSmsLogin.setTextColor(getColor(R.color.black))
+        binding.tvPwdLogin.setTextColor(getColor(R.color.gray))
+
+        binding.smsRowLayout.visibility = View.VISIBLE
+        binding.passwordRowLayout.visibility = View.GONE   // 隐藏密码行容器
+
+        binding.registerText.visibility = View.VISIBLE
+        binding.forgetText.visibility = View.GONE
+        updateRegisterTextConstraints(center = true)
+
+        //需要正确的方法名和参数
+        updateLoginButtonTopConstraint(R.id.smsRowLayout)
+    }
+
+    private fun switchToPasswordMode() {
+        binding.tvPwdLogin.setTextColor(getColor(R.color.black))
+        binding.tvSmsLogin.setTextColor(getColor(R.color.gray))
+
+        binding.smsRowLayout.visibility = View.GONE
+        //正确的属性访问
+        binding.passwordRowLayout.visibility = View.VISIBLE  // 显示密码行容器
+
+        binding.registerText.visibility = View.VISIBLE
+        binding.forgetText.visibility = View.VISIBLE
+        updateRegisterTextConstraints(center = false)
+
+        updateLoginButtonTopConstraint(R.id.passwordRowLayout)
+    }
+
+    // 动态修改登录按钮的顶部约束
+    private fun updateLoginButtonTopConstraint(topTargetId: Int) {
+        val params = binding.loginBtn.layoutParams as ConstraintLayout.LayoutParams
+        params.topToBottom = topTargetId
+        params.topMargin = 32
+        binding.loginBtn.layoutParams = params
+    }
+
+    // 动态修改立即注册的约束（居中/左对齐）
+    private fun updateRegisterTextConstraints(center: Boolean) {
+        val params = binding.registerText.layoutParams as ConstraintLayout.LayoutParams
+        if (center) {
+            // 短信模式：居中显示
+            params.startToStart = ConstraintSet.PARENT_ID
+            params.endToEnd = ConstraintSet.PARENT_ID
+        } else {
+            // 密码模式：左对齐登录按钮
+            params.startToStart = binding.loginBtn.id
+            params.endToEnd = ConstraintSet.UNSET
+        }
+        params.topToBottom  = binding.loginBtn.id
+        params.topMargin = 20
+        binding.registerText.layoutParams = params
+    }
+
+    private fun setupClickListeners() {
+        binding.loginBtn.setOnClickListener {
+            val phone = binding.etPhone.text.toString()
+            if (phone.isEmpty()) {
+                Toast.makeText(this, "请输入手机号", Toast.LENGTH_SHORT).show()
+                return@setOnClickListener
+            }
+            when (currentLoginMode) {
+                LoginMode.SMS -> {
+                    val code = binding.etSmsCode.text.toString()
+                    if (code.isEmpty()) {
+                        Toast.makeText(this, "请输入验证码", Toast.LENGTH_SHORT).show()
+                    } else {
+                        Toast.makeText(this, "验证码登录成功\n手机号：$phone\n验证码：$code", Toast.LENGTH_SHORT).show()
+                    }
+                }
+                LoginMode.PASSWORD -> {
+                    val pwd = binding.etPassword.text.toString()
+                    if (pwd.isEmpty()) {
+                        Toast.makeText(this, "请输入密码", Toast.LENGTH_SHORT).show()
+                    } else {
+                        Toast.makeText(this, "密码登录成功\n手机号：$phone\n密码：$pwd", Toast.LENGTH_SHORT).show()
+                    }
+                }
+            }
+        }
+
+        binding.sendCodeBtn.setOnClickListener {
+            val phone = binding.etPhone.text.toString()
+            if (phone.isEmpty()) {
+                Toast.makeText(this, "请先输入手机号", Toast.LENGTH_SHORT).show()
+                return@setOnClickListener
+            }
+            Toast.makeText(this, "验证码已发送至 $phone", Toast.LENGTH_SHORT).show()
+            startCountDown()
+        }
+
+        binding.registerText.setOnClickListener {
+            val intent= Intent(this, RegisterActivity::class.java)
+            startActivity(intent)
+            Toast.makeText(this, "跳转到注册页面", Toast.LENGTH_SHORT).show()
+        }
+
+        binding.forgetText.setOnClickListener {
+            val intent= Intent(this, ForgetPasswordActivity::class.java)
+            startActivity(intent)
+            Toast.makeText(this, "找回密码", Toast.LENGTH_SHORT).show()
+        }
+    }
+
+    private fun startCountDown() {
+        binding.sendCodeBtn.isEnabled = false
+        object : CountDownTimer(60000, 1000) {
+            override fun onTick(millisUntilFinished: Long) {
+                binding.sendCodeBtn.text = "${millisUntilFinished / 1000}秒后重试"
+            }
+            override fun onFinish() {
+                binding.sendCodeBtn.text = "发送验证码"
+                binding.sendCodeBtn.isEnabled = true
+            }
+        }.start()
+    }
+}