优化列表请求失败和没有网络的显示状态，优化渐变颜色展示

app/src/main/java/com/ckkj/defense_device/adapter/DeviceAdapter.kt

@@ -3,25 +3,18 @@ package com.ckkj.defense_device.adapter
 import android.view.LayoutInflater
 import android.view.ViewGroup
 import androidx.recyclerview.widget.RecyclerView
+import com.bumptech.glide.Glide
 import com.ckkj.defense_device.R
+import com.ckkj.defense_device.bean.DeviceBean
 import com.ckkj.defense_device.databinding.ItemDeviceBinding
 
-data class DeviceUi(
-    val name: String,
-    val status: String,
-    val deviceId: String = ""
-) {
-    val isOnline: Boolean
-        get() = status == "1"
-}
-
 class DeviceAdapter(
-    private val onItemClick: (DeviceUi) -> Unit = {}
+    private val onItemClick: (DeviceBean) -> Unit = {}
 ) : RecyclerView.Adapter<DeviceAdapter.DeviceViewHolder>() {
 
-    private val items = mutableListOf<DeviceUi>()
+    private val items = mutableListOf<DeviceBean>()
 
-    fun submitList(deviceList: List<DeviceUi>) {
+    fun submitList(deviceList: List<DeviceBean>) {
         items.clear()
         items.addAll(deviceList)
         notifyDataSetChanged()
@@ -33,15 +26,25 @@ class DeviceAdapter(
     }
 
     override fun onBindViewHolder(holder: DeviceViewHolder, position: Int) {
-        holder.bind(items[position])
+        holder.bind(items[position], position)
     }
 
     override fun getItemCount(): Int = items.size
 
+    private val defaultIcons = listOf(R.mipmap.img1, R.mipmap.img2, R.mipmap.img3)
+
     inner class DeviceViewHolder(private val binding: ItemDeviceBinding) :
         RecyclerView.ViewHolder(binding.root) {
 
-        fun bind(item: DeviceUi) {
+        fun bind(item: DeviceBean, position: Int) {
+            if (item.deviceImg.isNullOrEmpty()) {
+                val iconResId = defaultIcons[position % defaultIcons.size]
+                binding.ivDeviceIcon.setImageResource(iconResId)
+            } else {
+                Glide.with(binding.root.context)
+                    .load(item.deviceImg)
+                    .into(binding.ivDeviceIcon)
+            }
             binding.tvDeviceType.text = item.name
             when (item.status) {
                 "1" -> {

app/src/main/java/com/ckkj/defense_device/bean/DeviceBean.kt

@@ -27,4 +27,13 @@ data class DeviceBean(
     val wifiPassword: String? = null,//WiFi密码
     val workMode: String? = null,//工作模式 0-自动 1-半自动
     val optionPassword: String? = null, //操作密码
-)
+) {
+    val deviceId: String
+        get() = id ?: ""
+
+    val name: String
+        get() = deviceName ?: ""
+
+    val isOnline: Boolean
+        get() = status == "1"
+}

app/src/main/java/com/ckkj/defense_device/home/HomeMenuFragment.kt

@@ -23,7 +23,6 @@ import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.recyclerview.widget.RecyclerView
 import com.ckkj.defense_device.R
 import com.ckkj.defense_device.adapter.DeviceAdapter
-import com.ckkj.defense_device.adapter.DeviceUi
 import com.ckkj.defense_device.adapter.FamilyAdapter
 import com.ckkj.defense_device.bean.DeviceBean
 import com.ckkj.defense_device.bean.FamilyBean
@@ -200,8 +199,8 @@ class HomeMenuFragment : Fragment() {
         // 为 LinearLayout 设置渐变背景
         setGradientBackground(
             view = binding.gradientLayout,
-            startColor = Color.parseColor("#EBDCED"),
+            startColor = resources.getColor(R.color.gradientLayout1),
-            endColor = Color.parseColor("#CAF4FF")
+            endColor = resources.getColor(R.color.gradientLayout2)
         )
         binding.message.setOnClickListener { 
             val intent = Intent(requireContext(), MessageActivity::class.java)
@@ -404,7 +403,7 @@ class HomeMenuFragment : Fragment() {
             } catch (e: Exception) {
                 withContext(Dispatchers.Main) {
                     binding.rvDeviceList.visibility = View.GONE
-                    binding.layoutNoPermission.visibility = View.VISIBLE
+                    binding.layoutNoNetwork.visibility = View.VISIBLE
                     Toast.makeText(requireContext(), R.string.network_error, Toast.LENGTH_SHORT).show()
                     isLoading = false
                     if (isLoadMore) {
@@ -450,20 +449,16 @@ class HomeMenuFragment : Fragment() {
     }
 
     private fun updateDeviceList() {
-        val deviceUiList = deviceBeanList.map {
+        if (deviceBeanList.isEmpty()) {
-            DeviceUi(it.deviceName ?: "", it.status ?: "", it.id ?: "")
-        }
-
-        if (deviceUiList.isEmpty()) {
             deviceAdapter.submitList(listOf(
-                DeviceUi(getString(R.string.no_device), "0")
+                DeviceBean(deviceName = getString(R.string.no_device), status = "0")
             ))
         } else {
-            deviceAdapter.submitList(deviceUiList)
+            deviceAdapter.submitList(deviceBeanList)
         }
     }
 
-    private fun onDeviceClicked(device: DeviceUi) {
+    private fun onDeviceClicked(device: DeviceBean) {
         if (device.isOnline) {
             DeviceIdEvent.setDeviceId(device.deviceId)
             val intent = Intent(requireContext(), LiveVideoActivity::class.java)

app/src/main/java/com/ckkj/defense_device/home/MessageActivity.kt

@@ -125,7 +125,7 @@ class MessageActivity : AppCompatActivity() {
                 e.printStackTrace()
                 withContext(Dispatchers.Main) {
                     if (allMessages.isEmpty()) {
-                        showEmptyState()
+                        noNetwork()
                     }
                 }
             } finally {
@@ -152,6 +152,12 @@ class MessageActivity : AppCompatActivity() {
         binding.emptyLayout.visibility = View.GONE
     }
 
+    private fun noNetwork() {
+        binding.rvMessageList.visibility = View.GONE
+        binding.layoutNoNetwork.visibility = View.VISIBLE
+        binding.tvNoMoreData.visibility = View.GONE
+    }
+    
     private fun showNoMoreDataHint() {
         binding.tvNoMoreData.visibility = View.VISIBLE
     }

app/src/main/java/com/ckkj/defense_device/liveVideo/AddLinkedUserActivity.kt

@@ -3,6 +3,7 @@ package com.ckkj.defense_device.liveVideo
 import android.os.Bundle
 import android.text.Editable
 import android.text.TextWatcher
+import android.view.View
 import android.widget.Toast
 import androidx.appcompat.app.AppCompatActivity
 import androidx.lifecycle.lifecycleScope
@@ -95,19 +96,33 @@ class AddLinkedUserActivity : AppCompatActivity() {
                             Toast.makeText(this@AddLinkedUserActivity, "暂无家庭成员数据", Toast.LENGTH_SHORT).show()
                         }
                     } else {
+                        hide()
                         Toast.makeText(this@AddLinkedUserActivity, "请求失败: ${response.msg}", Toast.LENGTH_SHORT).show()
                     }
                 }
             } catch (e: Exception) {
-                android.util.Log.e("AddLinkedUserActivity", "网络请求异常", e)
                 withContext(Dispatchers.Main) {
                     binding.swipeRefresh.isRefreshing = false
+                    noNetwork()
                     Toast.makeText(this@AddLinkedUserActivity, "网络请求失败: ${e.message}", Toast.LENGTH_SHORT).show()
                 }
             }
         }
     }
 
+    private fun hide() {
+        binding.searchLayout.visibility = View.GONE
+        binding.rvAddLinkedUser.visibility = View.GONE
+        binding.butting?.visibility = View.GONE
+        binding.layoutNoPermission?.visibility = View.VISIBLE
+    }
+    private fun noNetwork() {
+        binding.searchLayout.visibility = View.GONE
+        binding.rvAddLinkedUser.visibility = View.GONE
+        binding.butting?.visibility = View.GONE
+        binding.layoutNoNetwork?.visibility = View.VISIBLE
+    }
+
     private fun updateFamilyMemberList(familyMembersList: List<FamilyMembersBean>) {
         fullUserItemList.clear()
         familyMembersList.forEach { member ->

app/src/main/java/com/ckkj/defense_device/liveVideo/LinkedUserActivity.kt

@@ -265,8 +265,8 @@ class LinkedUserActivity : AppCompatActivity() {
                 e.printStackTrace()
                 withContext(Dispatchers.Main) {
                     binding.swipeRefresh.isRefreshing = false
-                    hide()
+                    noNetwork()
-                    Toast.makeText(this@LinkedUserActivity, "网络请求失败", Toast.LENGTH_SHORT).show()
+                    Toast.makeText(this@LinkedUserActivity, R.string.network_request_failed, Toast.LENGTH_SHORT).show()
                 }
             }
         }
@@ -277,6 +277,12 @@ class LinkedUserActivity : AppCompatActivity() {
         binding.butting?.visibility = View.GONE
         binding.layoutNoPermission?.visibility = View.VISIBLE
     }
+    private fun noNetwork() {
+        binding.searchLayout.visibility = View.GONE
+        binding.rvLinkedUser.visibility = View.GONE
+        binding.butting?.visibility = View.GONE
+        binding.layoutNoNetwork?.visibility = View.VISIBLE
+    }
 
     private fun updateDeviceUserList(deviceUserList: List<DeviceUserBean>) {
         fullUserList.clear()

app/src/main/res/layout/add_linked_user_activity.xml

@@ -88,8 +88,41 @@
             android:paddingBottom="16dp"/>
     </androidx.swiperefreshlayout.widget.SwipeRefreshLayout>
 
+    <!-- 空页面 -->
+    <LinearLayout
+        android:id="@+id/layoutNoPermission"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:gravity="center"
+        android:orientation="vertical"
+        android:visibility="gone">
+
+        <ImageView
+            android:layout_width="244dp"
+            android:layout_height="131dp"
+            android:src="@mipmap/default_page"/>
+
+    </LinearLayout>
+    <LinearLayout
+        android:id="@+id/layoutNoNetwork"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:gravity="center"
+        android:orientation="vertical"
+        android:paddingHorizontal="32dp"
+        android:background="@color/white"
+        android:visibility="gone">
+
+        <ImageView
+            android:layout_width="244dp"
+            android:layout_height="131dp"
+            android:src="@mipmap/no_network_img_name" />
+
+    </LinearLayout>
+
     <!-- 底部按钮 -->
     <LinearLayout
+        android:id="@+id/butting"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:paddingHorizontal="16dp"

app/src/main/res/layout/home_menu_fragment.xml

@@ -168,6 +168,22 @@
                 android:src="@mipmap/default_page" />
 
         </LinearLayout>
+        <LinearLayout
+            android:id="@+id/layoutNoNetwork"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:gravity="center"
+            android:orientation="vertical"
+            android:paddingHorizontal="32dp"
+            android:background="@color/white"
+            android:visibility="gone">
+
+            <ImageView
+                android:layout_width="244dp"
+                android:layout_height="131dp"
+                android:src="@mipmap/no_network_img_name" />
+
+        </LinearLayout>
     </LinearLayout>
 
     <View

app/src/main/res/layout/linked_user_activity.xml

@@ -112,6 +112,22 @@
                     android:src="@mipmap/default_page"/>
 
             </LinearLayout>
+            <LinearLayout
+                android:id="@+id/layoutNoNetwork"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:gravity="center"
+                android:orientation="vertical"
+                android:paddingHorizontal="32dp"
+                android:background="@color/white"
+                android:visibility="gone">
+
+                <ImageView
+                    android:layout_width="244dp"
+                    android:layout_height="131dp"
+                    android:src="@mipmap/no_network_img_name" />
+
+            </LinearLayout>
 
         </FrameLayout>
 

app/src/main/res/layout/message_activity.xml

@@ -58,7 +58,23 @@
         <ImageView
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:src="@mipmap/no_message" />
+            android:src="@mipmap/default_page_img_name" />
+    </LinearLayout>
+    <LinearLayout
+        android:id="@+id/layoutNoNetwork"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:gravity="center"
+        android:orientation="vertical"
+        android:paddingHorizontal="32dp"
+        android:background="@color/white"
+        android:visibility="gone">
+
+        <ImageView
+            android:layout_width="244dp"
+            android:layout_height="131dp"
+            android:src="@mipmap/no_network_img_name" />
+
     </LinearLayout>
 
     <TextView

app/src/main/res/values/colors.xml

@@ -20,5 +20,7 @@
     <color name="green_light">#E8F7F7</color>
     <color name="gray_divider">#E5E5E5</color>
     <color name="orange">#FF9800</color>
+    <color name="gradientLayout1">#EBDCED</color>
+    <color name="gradientLayout2">#CAF4FF</color>
 
 </resources>