修复目录不存在时的bug

app/src/main/java/com/xypower/mpapp/MainActivity.java

@@ -430,10 +430,14 @@ public class MainActivity extends AppCompatActivity {
     private void saveAppConfig(String cmdid, String server, int port, int protocol, int networkProtocol) {
 
         String appPath = MicroPhotoService.buildAppDir(this.getApplicationContext());
-
         OutputStreamWriter outputStreamWriter = null;
         try {
 
+            File dataPath = new File(appPath + "data/");
+            if (!dataPath.exists()) {
+                dataPath.mkdirs();
+            }
+
             JSONObject jsonObject = new JSONObject();
             jsonObject.put("CMDID", cmdid);
             jsonObject.put("Server", server);