first working version

2026-08-31 13:21:15 +00:00 · 2016-02-11 16:13:50 -05:00
parent 710c54a4bb
commit 84c43a229e
10 changed files with 141 additions and 525 deletions
@@ -0,0 +1,91 @@
+package com.github.alinz.reactnativewebviewbridge;
+
+import javax.annotation.Nullable;
+import java.util.Map;
+
+import android.webkit.WebView;
+
+import com.facebook.react.views.webview.ReactWebViewManager;
+import com.facebook.react.views.webview.WebViewConfig;
+import com.facebook.react.bridge.ReadableArray;
+import com.facebook.react.bridge.ReactContext;
+import com.facebook.react.bridge.WritableMap;
+import com.facebook.react.common.MapBuilder;
+
+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 void sendToBridge(WebView root, String message) {
+    //root.loadUrl("javascript:(function() {\n" + script + ";\n})();");
+    String script = "WebViewBridge.onMessage('" + message + "');";
+    root.evaluateJavascript(script, null);
+  }
+
+  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;
+    }
+
+    //this code needs to be executed everytime a url changes.
+    root.evaluateJavascript(""
+    + "(function() {"
+        + "if (window.WebViewBridge) return;"
+        + "var customEvent = document.createEvent('Event');"
+        + "WebViewBridge = {"
+            + "send: function(message) { WebViewBridgeAndroid.send(message); },"
+            + "onMessage: function() {}"
+        + "};"
+        + "window.WebViewBridge = WebViewBridge;"
+        + "customEvent.initEvent('WebViewBridge', true, true);"
+        + "document.dispatchEvent(customEvent);"
+    +"}())", null);
+  }
+}