恢复解决摄像头占用前的版本

src/android/RedLightScan.java

@@ -86,20 +86,19 @@ public class RedLightScan extends CordovaPlugin {
     }
 
     private void registerReceiver() {
-        Log.d(TAG, "RedLightScan registerReceiver");
-        scanUtil = new ScanUtil(cordova.getActivity());
-        //we must set mode to 0 : BroadcastReceiver mode
-        scanUtil.setScanMode(0);
+        if (scanUtil == null) {
+            scanUtil = new ScanUtil(cordova.getActivity());
+            //we must set mode to 0 : BroadcastReceiver mode
+            scanUtil.setScanMode(0);
+        }
         IntentFilter filter = new IntentFilter();
         filter.addAction("com.rfid.SCAN");
         webView.getContext().registerReceiver(receiver, filter);
         this.receiverRegisted = true;
-        this.startScan();
         Log.d(TAG, "RedLightScan receiver registed");
     }
 
     private void unregisterReceiver() {
-        Log.d(TAG, "RedLightScan unregisterReceiver");
         if (scanUtil != null) {
             scanUtil.setScanMode(1);
             scanUtil.close();
@@ -112,6 +111,20 @@ public class RedLightScan extends CordovaPlugin {
         }
     }
 
+    @Override
+    public void onResume(boolean multitasking) {
+        super.onResume(multitasking);
+        Log.d(TAG, "RedLightScan Resume");
+        this.registerReceiver();
+    }
+
+    @Override
+    public void onPause(boolean multitasking) {
+        super.onPause(multitasking);
+        Log.d(TAG, "RedLightScan Pause");
+        this.unregisterReceiver();
+    }
+
     @Override
     public void onDestroy() {
         Log.d(TAG, "RedLightScan Destroy");

www/redlightscan.js

@@ -3,10 +3,10 @@ var cordova = require('cordova');
 module.exports = {
   startScan(success, error) {
     cordova.exec(function(data){
-      cordova.fireDocumentEvent("redlight.receive", {"data":data});
+      cordova.fireDocumentEvent("redlight.start", {"data":data});
       success && success(data);
     }, error, 'RedLightScan', 'startScan', []);
-    cordova.fireDocumentEvent("redlight.start");
+    cordova.fireDocumentEvent("redlight.register");
   },
   stopScan(success, error) {
     cordova.exec(function (data) {