增加人脸采集功能；

识别人脸成功后打开有餐盘的第一个柜子；
扫码打开已绑定的柜子，无则打开第一个空柜子并放入餐盘；
设置页面问题优化；

app/src/main/java/com/sw/platecabinet/utils/SpTool.kt

@@ -1,20 +1,42 @@
-package com.sw.platecabinet.utils;
+package com.sw.platecabinet.utils
 
-import com.sw.inbound.utils.SPUtil;
-import com.sw.platecabinet.MyApp;
+import com.google.gson.Gson
+import com.sw.inbound.utils.GsonUtils
+import com.sw.inbound.utils.SPUtil
+import com.sw.inbound.utils.SPUtil.Companion.getInstance
+import com.sw.platecabinet.MyApp
+import com.sw.platecabinet.model.response.EquipmentUserInfo
 
-public class SpTool {
+object SpTool {
+    const val LAST_FACE_TIMESTAMP: String = "faceTimestamp"
+    const val PLATE_BOX_DATA: String = "plateBoxBind"
+    private var spUtil: SPUtil? = null
 
-    public static final String LAST_FACE_TIMESTAMP = "faceTimestamp";
-
-    public static long getLastFaceTimestamp() {
-        return SPUtil.Companion.getInstance(MyApp.getContext(), "default_sp").get(LAST_FACE_TIMESTAMP, 0L);
+    init {
+        spUtil = getInstance(MyApp.instance!!, "default_sp")
     }
 
-    public static void setLastFaceTimestamp(long timestamp) {
-        SPUtil.Companion.getInstance(MyApp.getContext(), "default_sp").put(LAST_FACE_TIMESTAMP, timestamp);
+    fun putString(key:String, value:String) {
+        spUtil?.put(key, value)
     }
 
+    var lastFaceTimestamp: Long
+        get() = spUtil?.get<Long?>(SpTool.LAST_FACE_TIMESTAMP, 0L) ?: 0
+        set(timestamp) {
+            spUtil?.put(LAST_FACE_TIMESTAMP, timestamp)
+        }
 
+    fun savePlateData(items: List<EquipmentUserInfo>) {
+        val jsonData = Gson().toJson(items)
+        putString(PLATE_BOX_DATA, jsonData)
+    }
+
+    fun getPlateData(): List<EquipmentUserInfo>? {
+        val jsonData = spUtil?.get(PLATE_BOX_DATA, "")
+        if (jsonData.isNullOrBlank()) {
+            return null
+        }
+        return GsonUtils.fromJsonList(jsonData, EquipmentUserInfo::class.java)
+    }
 
 }