fix(base): 修复多处内存泄漏及生命周期安全问题

BaseVMBFragment:
- 修复 onDestroyView 中 mBinding == null（比较运算）为正确的 _mBinding = null（赋值），
  引入 backing field 模式彻底释放 View 引用，防止 Fragment 回退栈内存泄漏
- 修复 onDestroy 中 EventBus.unregister 判断条件取反（!isRegistered → isRegistered），
  确保 Fragment 销毁时正确注销，避免 EventBus 长期持有 Fragment 引用

BaseVMBActivity:
- 删除无效的 getResources() 重写（createConfigurationContext 返回值未使用），
  字体防缩放逻辑已由 attachBaseContext 正确实现

MainActivity:
- 删除 onSaveInstanceState(Bundle()) 错误重写，
  传入空 Bundle 导致 Fragment 状态无法保存，低内存恢复场景必现异常

EmergencyFragment:
- onDestroy 中补充主动停止并销毁 AMapLocationClient，
  防止 Fragment 销毁后 GPS 定位服务持续运行

HomeFragment:
- homeNoticeStartRepeat 新增 Job 引用，每次启动前取消旧协程，
  防止多次调用时多个轮询协程并发叠加导致接口重复请求

WatchItemFragment:
- newInstance 迁移至 companion object，符合 Android Fragment 工厂方法规范
- position 类型由 Int? 改为 Int，移除无用的 Fragment import

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/src/main/java/com/xjjk/healthyclients/MainActivity.kt

@@ -272,9 +272,6 @@ class MainActivity : BaseVMBActivity<MainViewModel, ActivityMainBinding>(R.layou
         super.onPause()
     }
 
-    override fun onSaveInstanceState(outState: Bundle) {
-        super.onSaveInstanceState(Bundle())
-    }
 
     override fun getFragmentByTag(tabTag: String): Fragment? {
         when (tabTag) {

app/src/main/java/com/xjjk/healthyclients/base/BaseVMBActivity.kt

@@ -70,15 +70,6 @@ abstract class BaseVMBActivity<VM : BaseViewModel, B : ViewDataBinding>(private
     var mEmpty: View?=null
     var mRootView:RelativeLayout?=null
 
-    /**
-     * 重写getResources()方法，让APP的字体不受系统设置字体大小影响
-     */
-    override fun getResources(): Resources? {
-        val config = Configuration()
-        config.setToDefaults()
-        createConfigurationContext(config)
-        return super.getResources()
-    }
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)

app/src/main/java/com/xjjk/healthyclients/base/BaseVMBFragment.kt

@@ -56,15 +56,21 @@ abstract class BaseVMBFragment<VM : BaseViewModel, B : ViewDataBinding>(private
     private var mIsFirstLoading = true
     var dialog: LoadingDialog? = null
     protected lateinit var mViewModel: VM
-    lateinit var mBinding: B
+
+    /** ViewDataBinding 可空 backing field，onDestroyView 时置 null 防止内存泄漏 */
+    private var _mBinding: B? = null
+
+    /** 对外暴露的非空 getter，仅在 onCreateView ~ onDestroyView 生命周期内有效 */
+    val mBinding: B get() = _mBinding!!
+
     var mEmpty: View? = null
     override fun onCreateView(
         inflater: LayoutInflater,
         container: ViewGroup?,
         savedInstanceState: Bundle?
     ): View? {
-        mBinding = DataBindingUtil.inflate(inflater, contentViewResId, container, false)
+        _mBinding = DataBindingUtil.inflate(inflater, contentViewResId, container, false)
-        return mBinding.root
+        return _mBinding!!.root
     }
 
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
@@ -306,13 +312,15 @@ abstract class BaseVMBFragment<VM : BaseViewModel, B : ViewDataBinding>(private
     }
 
     override fun onDestroyView() {
-        mBinding == null
         super.onDestroyView()
+        // 置 null 释放 View 引用，防止 Fragment 回退栈期间内存泄漏
+        _mBinding = null
     }
 
     override fun onDestroy() {
         super.onDestroy()
-        if (!EventBus.getDefault().isRegistered(this)) {
+        // 已注册才执行注销，避免 EventBus 持有 Fragment 引用
+        if (EventBus.getDefault().isRegistered(this)) {
             EventBus.getDefault().unregister(this)
         }
     }

app/src/main/java/com/xjjk/healthyclients/fragment/EmergencyFragment.kt

@@ -180,6 +180,10 @@ class EmergencyFragment :
 
     override fun onDestroy() {
         super.onDestroy()
+        // 主动停止并销毁定位客户端，防止 Fragment 销毁后 GPS 定位服务持续运行造成资源浪费
+        mlocationClient?.stopLocation()
+        mlocationClient?.onDestroy()
+        mlocationClient = null
         mMapView?.onDestroy()
     }
 

app/src/main/java/com/xjjk/healthyclients/fragment/HomeFragment.kt

@@ -32,6 +32,7 @@ import com.xjjk.healthyclients.ui.viewmodel.HomeViewModel
 import com.xjjk.healthyclients.utils.ConstantUtils
 import com.xjjk.healthyclients.utils.IMInputActionSettingUtils
 import com.xjjk.healthyclients.utils.TUIUtils
+import kotlinx.coroutines.Job
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.flow.collectLatest
 import kotlinx.coroutines.launch
@@ -49,9 +50,11 @@ class HomeFragment :
     var mGuidanceFragmentDoctorAdapter: GuidanceFragmentDoctorAdapter? = null
 
     var REQUEST_DURATION = 1000 * 120L
-
     var noticeTime = REQUEST_DURATION
 
+    /** 通知轮播协程 Job，重新启动前先取消旧任务，防止多协程并发叠加 */
+    private var noticeJob: Job? = null
+
 
     override fun initView(root: View?, savedInstanceState: Bundle?) {
         mBinding.swipeRefresh.initColors()
@@ -339,7 +342,9 @@ class HomeFragment :
     }
 
     private fun homeNoticeStartRepeat() {
-        lifecycleScope.launch {
+        // 取消旧的轮询协程，防止多次调用时多个协程并发叠加
+        noticeJob?.cancel()
+        noticeJob = lifecycleScope.launch {
             repeat(500) {
                 mViewModel.getHomeNoticeListRepeat()
                 delay(noticeTime)

app/src/main/java/com/xjjk/healthyclients/fragment/WatchItemFragment.kt

@@ -3,7 +3,6 @@ package com.xjjk.healthyclients.fragment
 import android.os.Bundle
 import android.text.TextUtils
 import android.view.View
-import androidx.fragment.app.Fragment
 import com.sw.healthyclients.utils.DateUtil
 import com.xjjk.healthyclients.R
 import com.xjjk.healthyclients.base.BaseVMBFragment
@@ -20,18 +19,25 @@ import com.xjjk.healthyclients.ui.viewmodel.HomeViewModel
  */
 class WatchItemFragment :
     BaseVMBFragment<HomeViewModel, FragmentItemWatchBinding>(R.layout.fragment_item_watch) {
-    var position: Int? = -1
 
-    fun newInstance(position: Int): Fragment {
+    companion object {
+        /**
+         * 创建 WatchItemFragment 实例，通过 arguments 传入 Tab 位置
+         * @param position Tab 位置（0=心率 1=血氧 2=压力 3=体温 4=睡眠）
+         */
+        fun newInstance(position: Int): WatchItemFragment {
             val args = Bundle()
             args.putInt("position", position)
-        val fragment = WatchItemFragment()
+            return WatchItemFragment().apply {
-        fragment.arguments = args
+                arguments = args
-        return fragment
+            }
+        }
     }
 
+    private var position: Int = -1
+
     override fun initView(root: View?, savedInstanceState: Bundle?) {
-        position = arguments?.getInt("position")
+        position = arguments?.getInt("position") ?: -1
         mBinding.watchTypeImg.setImageResource(getWatchTypeImg(position))
 
         if (position != 4) {

app/src/main/java/com/xjjk/healthyclients/view/HomeWatchView.kt

@@ -121,7 +121,7 @@ class HomeWatchView(context: Context?, attrs: AttributeSet?) :
     }
 
     override fun createFragment(position: Int): Fragment {
-        return WatchItemFragment().newInstance(position)
+        return WatchItemFragment.newInstance(position)
     }
 
 }