修复5.x上webview加载asset资源失败的问题

limpoxe · limpoxe · commit f5082f29fd9b · 2016-01-28T19:48:19.000+08:00
diff --git a/PluginCore/src/com/plugin/core/PluginLoader.java b/PluginCore/src/com/plugin/core/PluginLoader.java
@@ -23,6 +23,7 @@
 import android.content.res.Resources;
 import android.os.Build;
 import android.os.Bundle;
+import android.os.Handler;
 import android.text.TextUtils;
 
 import com.plugin.content.PluginDescriptor;
@@ -35,6 +36,7 @@
 import com.plugin.core.systemservice.AndroidAppIActivityManager;
 import com.plugin.core.systemservice.AndroidAppINotificationManager;
 import com.plugin.core.systemservice.AndroidAppIPackageManager;
+import com.plugin.core.systemservice.AndroidWebkitWebViewFactoryProvider;
 import com.plugin.core.systemservice.AndroidWidgetToast;
 import com.plugin.util.LogUtil;
 import com.plugin.util.FileUtil;
@@ -88,6 +90,13 @@ public static synchronized void initLoader(Application app, PluginManager manage
 			AndroidAppINotificationManager.installProxy();
 			AndroidAppIPackageManager.installProxy(sApplication.getPackageManager());
 			AndroidWidgetToast.installProxy();
+			//不可在主进程中同步安装，因为此时ActivityThread还没有准备好, 会导致空指针。
+			new Handler().postDelayed(new Runnable() {
+				@Override
+				public void run() {
+					AndroidWebkitWebViewFactoryProvider.installProxy();
+				}
+			}, 50);
 
 			PluginInjector.injectInstrumentation();
 			PluginInjector.injectHandlerCallback();
diff --git a/PluginCore/src/com/plugin/core/systemservice/AndroidWebkitWebViewFactoryProvider.java b/PluginCore/src/com/plugin/core/systemservice/AndroidWebkitWebViewFactoryProvider.java
@@ -0,0 +1,91 @@
+package com.plugin.core.systemservice;
+
+import android.content.Context;
+import android.os.Build;
+import android.webkit.WebView;
+
+import com.plugin.core.proxy.MethodDelegate;
+import com.plugin.core.proxy.MethodProxy;
+import com.plugin.core.proxy.ProxyUtil;
+import com.plugin.util.LogUtil;
+import com.plugin.util.RefInvoker;
+
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+
+/**
+ * Created by cailiming on 16/1/28.
+ */
+public class AndroidWebkitWebViewFactoryProvider extends MethodProxy {
+
+    public static void installProxy() {
+        if (Build.VERSION.SDK_INT >= 19) {
+            LogUtil.d("安装WebViewFactoryProviderProxy");
+            //在4。4及以上，这里的WebViewFactoryProvider的实际类型是
+            // com.android.webview.chromium.WebViewChromiumFactoryProvider implements WebViewFactoryProvider
+            Object webViewFactoryProvider = RefInvoker.invokeMethod(null, "android.webkit.WebViewFactory", "getProvider", (Class[]) null, (Object[]) null);
+            Object webViewFactoryProviderProxy = ProxyUtil.createProxy(webViewFactoryProvider, new AndroidWebkitWebViewFactoryProvider());
+            RefInvoker.setStaticOjbect("android.webkit.WebViewFactory", "sProviderInstance", webViewFactoryProviderProxy);
+            LogUtil.d("安装完成");
+        }
+    }
+
+    static {
+        sMethods.put("createWebView", new createWebView());
+    }
+
+    public static class createWebView extends MethodDelegate {
+
+        @Override
+        public Object afterInvoke(Object target, Method method, Object[] args, Object beforeInvoke, final Object invokeResult) {
+            //这里invokeResult的实际类型是
+            // com.android.webview.chromium.WebViewChromium implements WebViewProvider
+            //所以这里可以再次进行Proxy
+            final WebView webView = (WebView) args[0];
+            return ProxyUtil.createProxy(invokeResult, new MethodDelegate() {
+
+                @Override
+                public Object beforeInvoke(Object target, Method method, Object[] args) {
+                    fixWebViewAsset(webView.getContext());
+                    return super.beforeInvoke(target, method, args);
+                }
+
+            });
+        }
+    }
+
+    private static void fixWebViewAsset(Context context) {
+        try {
+            if (sContentMain == null) {
+                Object provider = RefInvoker.invokeMethod(null, "android.webkit.WebViewFactory", "getProvider", (Class[]) null, (Object[]) null);
+                if (provider != null) {
+                    ClassLoader cl = provider.getClass().getClassLoader();
+
+                    try {
+                        sContentMain = Class.forName("org.chromium.content.app.ContentMain", true, cl);
+                    } catch (ClassNotFoundException e) {
+                    }
+
+                    if (sContentMain == null) {
+                        try {
+                            sContentMain = Class.forName("com.android.org.chromium.content.app.ContentMain", true, cl);
+                        } catch (ClassNotFoundException e) {
+                        }
+                    }
+
+                    if (sContentMain == null) {
+                        throw new ClassNotFoundException(String.format("Can not found class %s or %s in classloader %s", "org.chromium.content.app.ContentMain", "com.android.org.chromium.content.app.ContentMain", cl));
+                    }
+                }
+            }
+            if (sContentMain != null) {
+                RefInvoker.invokeMethod(null, sContentMain, "initApplicationContext", new Class[]{Context.class}, new Object[]{context.getApplicationContext()});
+            }
+        } catch (Exception e) {
+            LogUtil.printException("createWebview", e);
+        }
+    }
+
+    private static Class sContentMain;
+
+}
