设置页面（1）

app/src/main/java/com/example/defenseapplication/liveVideo/WarningVoiceContentActivity.kt

@@ -0,0 +1,47 @@
+package com.example.defenseapplication.liveVideo
+
+import android.graphics.Color
+import android.os.Bundle
+import android.text.Editable
+import androidx.activity.enableEdgeToEdge
+import androidx.appcompat.app.AppCompatActivity
+import androidx.core.widget.doAfterTextChanged
+import com.example.defenseapplication.databinding.WarningVoiceContentActivityBinding
+import com.gyf.immersionbar.ImmersionBar
+
+class WarningVoiceContentActivity : AppCompatActivity() {
+
+    private lateinit var binding: WarningVoiceContentActivityBinding
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        binding = WarningVoiceContentActivityBinding.inflate(layoutInflater)
+        setContentView(binding.root)
+        // ImmersionBar核心调用,沉浸式
+        ImmersionBar.with(this)
+            .statusBarDarkFont(true)
+            .titleBar(binding.topBar)
+            .init()
+        // 初始化计数显示
+        val initialLength = binding.etWarningContent.text.length
+        updateWordCount(initialLength)
+
+        // 添加文本变化监听
+        binding.etWarningContent.doAfterTextChanged { text ->
+            val length = text?.length ?: 0
+            updateWordCount(length)
+        }
+        binding.btnBack.setOnClickListener {
+            finish()
+        }
+        binding.btnSave.setOnClickListener {
+            //保存的逻辑
+            finish()
+        }
+    }
+    private fun updateWordCount(current: Int) {
+        binding.tvWordCount.text = "$current/100"
+        //字数达到上限时改变颜色
+        val color = if (current >= 100) Color.RED else Color.GRAY
+        binding.tvWordCount.setTextColor(color)
+    }
+}