!21387 Fix example code for deviceManager

Merge pull request !21387 from dongbinbin/bran0629

zh-cn/application-dev/reference/apis/js-apis-driver-deviceManager.md

@@ -82,7 +82,8 @@ bindDevice(deviceId: number, onDisconnect: AsyncCallback<number>,
 
 ```js
 try {
-  deviceManager.bindDevice(device.deviceId, (error, data) => {
+  // 12345678为示例deviceId，应用开发时可通过queryDevices查询到相应设备的deviceId作为入参
+  deviceManager.bindDevice(12345678, (error, data) => {
     console.error('Device is disconnected');
   }, (error, data) => {
     if (error) {
@@ -131,7 +132,8 @@ bindDevice(deviceId: number, onDisconnect: AsyncCallback<number>): Promise
 
 ```js
 try {
-  deviceManager.bindDevice(matchDevice.deviceId, (error, data) => {
+  // 12345678为示例deviceId，应用开发时可通过queryDevices查询到相应设备的deviceId作为入参
+  deviceManager.bindDevice(12345678, (error, data) => {
     console.error('Device is disconnected');
   }).then(data => {
     console.info('bindDevice success');
@@ -169,7 +171,8 @@ unbindDevice(deviceId: number, callback: AsyncCallback<number>): void
 
 ```js
 try {
-  deviceManager.unbindDevice(matchDevice.deviceId, (error, data) => {
+  // 12345678为示例deviceId，应用开发时可通过queryDevices查询到相应设备的deviceId作为入参
+  deviceManager.unbindDevice(12345678, (error, data) => {
   if (error) {
     console.error('unbindDevice async fail. Code is ${error.code}, message is ${error.message}');
     return;
@@ -211,7 +214,8 @@ unbindDevice(deviceId: number): Promise<number>
 
 ```js
 try {
-  deviceManager.unbindDevice(matchDevice.deviceId).then(data => {
+  // 12345678为示例deviceId，应用开发时可通过queryDevices查询到相应设备的deviceId作为入参
+  deviceManager.unbindDevice(12345678).then(data => {
     console.info('unbindDevice success');
   }, error => {
     console.error('unbindDevice async fail. Code is ${error.code}, message is ${error.message}');