[Android] separate openUrl and reloadUrl to keep WebView settings (#187)

* separate openUrl and reloadUrl to keep WebView settings

* enable mixed content support in Android WebView

* enable mixed content support in Android WebView

* increase version number

* always allow mixed content

* reconfig Mixed Content Mode as Compatibility Mode

* fix bug UIViewController nil, support multiple windows in Android

* add global clean cookie function

Author: hnvn

android/src/main/java/com/flutter_webview_plugin/FlutterWebviewPlugin.java

@@ -7,6 +7,9 @@
 import android.graphics.Point;
 import android.view.Display;
 import android.widget.FrameLayout;
+import android.webkit.CookieManager;
+import android.webkit.ValueCallback;
+import android.os.Build;
 
 import java.util.Map;
 
@@ -70,7 +73,10 @@ public void onMethodCall(MethodCall call, MethodChannel.Result result) {
                 break;
             case "stopLoading":
                 stopLoading(call, result);
-                break;				
+                break;
+            case "cleanCookie":
+                cleanCookie(call, result);
+                break;
             default:
                 result.notImplemented();
                 break;
@@ -86,6 +92,8 @@ private void openUrl(MethodCall call, MethodChannel.Result result) {
         boolean clearCookies = call.argument("clearCookies");
         boolean withZoom = call.argument("withZoom");
         boolean withLocalStorage = call.argument("withLocalStorage");
+        boolean supportMultipleWindows = call.argument("supportMultipleWindows");
+        boolean appCacheEnabled = call.argument("appCacheEnabled");
         Map<String, String> headers = call.argument("headers");
         boolean scrollBar = call.argument("scrollBar");
 
@@ -106,7 +114,9 @@ private void openUrl(MethodCall call, MethodChannel.Result result) {
                 headers,
                 withZoom,
                 withLocalStorage,
-                scrollBar
+                scrollBar,
+                supportMultipleWindows,
+                appCacheEnabled
         );
         result.success(null);
     }
@@ -132,7 +142,7 @@ private FrameLayout.LayoutParams buildLayoutParams(MethodCall call) {
     }
 
     private void stopLoading(MethodCall call, MethodChannel.Result result) {
-        if (webViewManager != null){
+        if (webViewManager != null) {
             webViewManager.stopLoading(call, result);
         }
     }
@@ -144,47 +154,40 @@ private void close(MethodCall call, MethodChannel.Result result) {
         }
     }
 
-    /** 
-    * Navigates back on the Webview.
-    */
+    /**
+     * Navigates back on the Webview.
+     */
     private void back(MethodCall call, MethodChannel.Result result) {
         if (webViewManager != null) {
             webViewManager.back(call, result);
         }
     }
-    /** 
-    * Navigates forward on the Webview.
-    */
+
+    /**
+     * Navigates forward on the Webview.
+     */
     private void forward(MethodCall call, MethodChannel.Result result) {
         if (webViewManager != null) {
             webViewManager.forward(call, result);
         }
     }
 
-    /** 
-    * Reloads the Webview.
-    */
+    /**
+     * Reloads the Webview.
+     */
     private void reload(MethodCall call, MethodChannel.Result result) {
         if (webViewManager != null) {
             webViewManager.reload(call, result);
         }
     }
+
     private void reloadUrl(MethodCall call, MethodChannel.Result result) {
         if (webViewManager != null) {
             String url = call.argument("url");
-            webViewManager.openUrl(false,
-                    false,
-                    false,
-                    false,
-                    "",
-                    url,
-                    null,
-                    false,
-                    false,
-                    false
-            );
+            webViewManager.reloadUrl(url);
         }
     }
+
     private void eval(MethodCall call, final MethodChannel.Result result) {
         if (webViewManager != null) {
             webViewManager.eval(call, result);
@@ -198,25 +201,41 @@ private void resize(MethodCall call, final MethodChannel.Result result) {
         }
         result.success(null);
     }
+
     private void hide(MethodCall call, final MethodChannel.Result result) {
         if (webViewManager != null) {
             webViewManager.hide(call, result);
         }
     }
+
     private void show(MethodCall call, final MethodChannel.Result result) {
         if (webViewManager != null) {
             webViewManager.show(call, result);
         }
     }
 
+    private void cleanCookie(MethodCall call, final MethodChannel.Result result) {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
+            CookieManager.getInstance().removeAllCookies(new ValueCallback<Boolean>() {
+                @Override
+                public void onReceiveValue(Boolean aBoolean) {
+
+                }
+            });
+        } else {
+            CookieManager.getInstance().removeAllCookie();
+        }
+        result.success(null);
+    }
+
     private int dp2px(Context context, float dp) {
         final float scale = context.getResources().getDisplayMetrics().density;
         return (int) (dp * scale + 0.5f);
     }
 
     @Override
     public boolean onActivityResult(int i, int i1, Intent intent) {
-        if(webViewManager != null && webViewManager.resultHandler != null){
+        if (webViewManager != null && webViewManager.resultHandler != null) {
             return webViewManager.resultHandler.handleResult(i, i1, intent);
         }
         return false;

android/src/main/java/com/flutter_webview_plugin/WebviewManager.java

@@ -12,6 +12,7 @@
 import android.webkit.CookieManager;
 import android.webkit.ValueCallback;
 import android.webkit.WebChromeClient;
+import android.webkit.WebSettings;
 import android.webkit.WebView;
 import android.webkit.WebViewClient;
 import android.widget.FrameLayout;
@@ -193,11 +194,19 @@ private void clearCache() {
         webView.clearFormData();
     }
 
-    void openUrl(boolean withJavascript, boolean clearCache, boolean hidden, boolean clearCookies, String userAgent, String url, Map<String, String> headers, boolean withZoom, boolean withLocalStorage, boolean scrollBar) {
+    void openUrl(boolean withJavascript, boolean clearCache, boolean hidden, boolean clearCookies, String userAgent, String url, Map<String, String> headers, boolean withZoom, boolean withLocalStorage, boolean scrollBar, boolean supportMultipleWindows, boolean appCacheEnabled) {
         webView.getSettings().setJavaScriptEnabled(withJavascript);
         webView.getSettings().setBuiltInZoomControls(withZoom);
         webView.getSettings().setSupportZoom(withZoom);
         webView.getSettings().setDomStorageEnabled(withLocalStorage);
+        webView.getSettings().setJavaScriptCanOpenWindowsAutomatically(supportMultipleWindows);
+        webView.getSettings().setSupportMultipleWindows(supportMultipleWindows);
+        webView.getSettings().setAppCacheEnabled(appCacheEnabled);
+
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
+            Log.d("WebviewManager", "Mixed Content enabled");
+            webView.getSettings().setMixedContentMode(WebSettings.MIXED_CONTENT_COMPATIBILITY_MODE);
+        }
 
         if (clearCache) {
             clearCache();
@@ -226,6 +235,10 @@ void openUrl(boolean withJavascript, boolean clearCache, boolean hidden, boolean
         }
     }
 
+    void reloadUrl(String url) {
+        webView.loadUrl(url);
+    }
+
     void close(MethodCall call, MethodChannel.Result result) {
         if (webView != null) {
             ViewGroup vg = (ViewGroup) (webView.getParent());