优化打印机连接

android @ c8c06aeb

-Subproject commit baab8abedf9e86b923151a4fa61bc968f358e22a
+Subproject commit c8c06aeb3b1938888aecd245c3838466a9dce74e

src/pages/CounterMixins.js

@@ -120,6 +120,8 @@ const CounterMixins = ComposeComponent => {
         await handleScan();
         this.barcode = '';
       });
+      const isConnected = await Printer.isConnected();
+      if (!isConnected) await Printer.usbConnect(); // 尝试连接打印机模块
       this.listen();
     };
 
@@ -412,14 +414,6 @@ const CounterMixins = ComposeComponent => {
     };
 
     print = async () => {
-      const isConnected = await Printer.isConnected();
-      if (!isConnected) {
-        const success = await Printer.usbConnect();
-        if (!success) {
-          Toast.info('打印机模块未连接，无法打印');
-          return;
-        }
-      }
       let total = 0;
       let goods = [];
       this.state.printer.map(v => {