修复UpdateCommandHandler单例在已初始化后再次调用不刷新下载地址的问题

app/src/main/java/com/bgycc/smartcanteen/command/UpdateCommandHandler.java

@@ -60,12 +60,12 @@ public class UpdateCommandHandler extends CommandHandler {
             synchronized (UpdateCommandHandler.class) {
                 if (instance == null) {
                     instance = new UpdateCommandHandler(command, gson, callback);
+                } else {
+                    instance.init(command, gson, callback);
                 }
             }
-        }
-        // 当callback发生变化时，重新设置
-        if (!callback.equals(instance.commandProgressCallback)) {
-            instance.commandProgressCallback = callback;
+        } else {
+            instance.init(command, gson, callback);
         }
         return instance;
     }
@@ -88,6 +88,15 @@ public class UpdateCommandHandler extends CommandHandler {
         FileUtils.delete(updateApk);
     }
 
+    private void init(Command command, Gson gson, CommandProgressCallback callback) {
+        this.command = command;
+        this.gson = gson;
+        this.commandProgressCallback = callback;
+        this.commandUpdate = gson.fromJson(command.getData(), CommandUpdate.class);
+        this.updateApk = new File(Utils.getApp().getCacheDir(), UPDATE_APK);
+        FileUtils.delete(updateApk);
+    }
+
     @Override
     public synchronized CommandResponse run() {
         if (start) {
@@ -154,14 +163,14 @@ public class UpdateCommandHandler extends CommandHandler {
             AppUtils.AppInfo info = AppUtils.getApkInfo(updateApk);
             if (info == null || !info.getPackageName().equals(BuildConfig.APPLICATION_ID)) {
                 FileUtils.delete(updateApk);
-                LogUtils.w(TAG, "更新包包名非法");
+                LogUtils.w(TAG, "更新包包名非法: " + (info == null ? "null" : info.getPackageName()));
                 idle("", 0);
                 start = false;
                 return;
             }
             if (info.getVersionCode() == BuildConfig.VERSION_CODE) {
                 FileUtils.delete(updateApk);
-                LogUtils.w(TAG, "更新包已安装");
+                LogUtils.w(TAG, "当前版本: " + BuildConfig.VERSION_CODE + ", 安装包版本: " + info.getVersionCode());
             } else if (info.getVersionCode() < BuildConfig.VERSION_CODE) {
                 FileUtils.delete(updateApk);
                 LogUtils.d(TAG, "不允许安装低版本");