observer the bridge injected event in Java Code

Author: lemon

easybridge/src/main/java/tech/easily/easybridge/lib/EasyBridgeWebView.java

@@ -34,6 +34,13 @@
  */
 public class EasyBridgeWebView extends WebView {
 
+    public interface OnBridgeInjectedListener {
+        /**
+         * observe the bridge injected event of each page
+         */
+        void onInjected();
+    }
+
     private static final String JAVA_SCRIPT_PROTOCOL = "javascript:";
     static final String MAPPING_JS_INTERFACE_NAME = "_easybridge";
     private static final String DEFAULT_BRIDGE_NAME = "easyBridge";
@@ -43,6 +50,7 @@ public class EasyBridgeWebView extends WebView {
     protected SecurityPolicyChecker policyChecker;
     // whether the bridge had been injected to the currentPage
     private volatile boolean isInjected;
+    private OnBridgeInjectedListener listener;
 
     public EasyBridgeWebView(Context context, String bridgeName) {
         this(context, (AttributeSet) null);
@@ -77,6 +85,9 @@ private void initWebView() {
             @Override
             public void onCall(String parameters, ResultCallBack callBack) {
                 Logger.debug("inject bridge success in page:" + getUrl());
+                if (listener != null) {
+                    listener.onInjected();
+                }
                 setInjected(true);
             }
         });
@@ -97,6 +108,9 @@ public void unregisterHandler(String handlerName) {
     // use to execute JavaScript
     public void callHandler(String handlerName, String parameters, ResultCallBack resultCallBack) {
         if (easyBridge != null) {
+            if (parameters == null) {
+                parameters = "";
+            }
             easyBridge.callHandler(handlerName, parameters, resultCallBack);
         }
     }
@@ -140,6 +154,10 @@ public void setPolicyChecker(SecurityPolicyChecker policyChecker) {
         this.policyChecker = policyChecker;
     }
 
+    public void setBridgeInjectedListener(OnBridgeInjectedListener listener) {
+        this.listener = listener;
+    }
+
     public EasyBridgeWebView setDebuggable(boolean debuggable) {
         Logger.setDebuggable(debuggable);
         return this;