establish bridge on WebView instance creation

Author: hmedney

android/src/main/java/com/github/alinz/reactnativewebviewbridge/WebViewBridgeManager.java

@@ -2,98 +2,72 @@
 
 import android.webkit.WebView;
 
-import com.facebook.react.bridge.ReactContext;
 import com.facebook.react.bridge.ReadableArray;
+import com.facebook.react.uimanager.ThemedReactContext;
 import com.facebook.react.views.webview.ReactWebViewManager;
-import com.facebook.react.views.webview.WebViewConfig;
 
+import java.util.ArrayList;
 import java.util.Map;
 
 import javax.annotation.Nullable;
 
 public class WebViewBridgeManager extends ReactWebViewManager {
-  private static final String REACT_CLASS = "RCTWebViewBridge";
-
-  public static final int COMMAND_INJECT_BRIDGE_SCRIPT = 100;
-  public static final int COMMAND_SEND_TO_BRIDGE = 101;
-
-  private boolean initializedBridge;
-
-  public WebViewBridgeManager() {
-    super();
-    initializedBridge = false;
-  }
-
-  public WebViewBridgeManager(WebViewConfig webViewConfig) {
-    super(webViewConfig);
-    initializedBridge = false;
-  }
-
-  @Override
-  public String getName() {
-    return REACT_CLASS;
-  }
-
-  @Override
-  public @Nullable Map<String, Integer> getCommandsMap() {
-    Map<String, Integer> commandsMap = super.getCommandsMap();
-
-    commandsMap.put("injectBridgeScript", COMMAND_INJECT_BRIDGE_SCRIPT);
-    commandsMap.put("sendToBridge", COMMAND_SEND_TO_BRIDGE);
-
-    return commandsMap;
-  }
-
-  @Override
-  public void receiveCommand(WebView root, int commandId, @Nullable ReadableArray args) {
-    super.receiveCommand(root, commandId, args);
-
-    switch (commandId) {
-      case COMMAND_INJECT_BRIDGE_SCRIPT:
-        injectBridgeScript(root);
-        break;
-      case COMMAND_SEND_TO_BRIDGE:
-        sendToBridge(root, args.getString(0));
-        break;
-      default:
-        //do nothing!!!!
+    private static final String REACT_CLASS = "RCTWebViewBridge";
+
+    public static final int COMMAND_SEND_TO_BRIDGE = 101;
+
+    @Override
+    public String getName() {
+        return REACT_CLASS;
+    }
+
+    private ArrayList<Integer> webViewsWithBridgeScript = new ArrayList<Integer>();
+
+    @Override
+    public
+    @Nullable
+    Map<String, Integer> getCommandsMap() {
+        Map<String, Integer> commandsMap = super.getCommandsMap();
+
+        commandsMap.put("sendToBridge", COMMAND_SEND_TO_BRIDGE);
+
+        return commandsMap;
+    }
+
+    @Override
+    protected WebView createViewInstance(ThemedReactContext reactContext) {
+        WebView root = super.createViewInstance(reactContext);
+        root.getSettings().setAllowFileAccessFromFileURLs(true);
+        root.getSettings().setAllowUniversalAccessFromFileURLs(true);
+        root.addJavascriptInterface(new JavascriptBridge(root), "WebViewBridge");
+        return root;
     }
-  }
-
-  private void sendToBridge(WebView root, String message) {
-    //root.loadUrl("javascript:(function() {\n" + script + ";\n})();");
-    String script = "WebViewBridge.onMessage('" + message + "');";
-    WebViewBridgeManager.evaluateJavascript(root, script);
-  }
-
-  private void injectBridgeScript(WebView root) {
-    //this code needs to be called once per context
-    if (!initializedBridge) {
-      root.addJavascriptInterface(new JavascriptBridge((ReactContext) root.getContext()), "WebViewBridgeAndroid");
-      initializedBridge = true;
-      root.reload();
+
+    @Override
+    public void receiveCommand(WebView root, int commandId, @Nullable ReadableArray args) {
+        super.receiveCommand(root, commandId, args);
+        // if (true) return;
+
+        switch (commandId) {
+            case COMMAND_SEND_TO_BRIDGE:
+                sendToBridge(root, args.getString(0));
+                break;
+            default:
+                //do nothing!!!!
+        }
+    }
+
+    private void sendToBridge(WebView root, String message) {
+        //root.loadUrl("javascript:(function() {\n" + script + ";\n})();");
+        String script = "WebViewBridge.onMessage('" + message + "');";
+        WebViewBridgeManager.evaluateJavascript(root, script);
     }
 
-    // this code needs to be executed everytime a url changes.
-    WebViewBridgeManager.evaluateJavascript(root, ""
-            + "(function() {"
-            + "if (window.WebViewBridge) return;"
-            + "var customEvent = document.createEvent('Event');"
-            + "var WebViewBridge = {"
-              + "send: function(message) { WebViewBridgeAndroid.send(message); },"
-              + "onMessage: function() {}"
-            + "};"
-            + "window.WebViewBridge = WebViewBridge;"
-            + "customEvent.initEvent('WebViewBridge', true, true);"
-            + "document.dispatchEvent(customEvent);"
-            + "}());");
-  }
-
-  static private void evaluateJavascript(WebView root, String javascript) {
-    if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.KITKAT) {
-      root.evaluateJavascript(javascript, null);
-    } else {
-      root.loadUrl("javascript:" + javascript);
+    static private void evaluateJavascript(WebView root, String javascript) {
+        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.KITKAT) {
+            root.evaluateJavascript(javascript, null);
+        } else {
+            root.loadUrl("javascript:" + javascript);
+        }
     }
-  }
-}
+}