webview创建过程分析（三）

最新推荐文章于 2024-04-02 22:47:41 发布

andyhxc

最新推荐文章于 2024-04-02 22:47:41 发布

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分类专栏： android webview 文章标签：初始化过程

本文链接：https://blog.youkuaiyun.com/andyhxc/article/details/89460620

本文详细分析了AwContents在Android中的创建过程，包括构建AwWebContentsDelegateAdapter、AwContentsClientBridge、AwZoomControls等关键步骤，以及在不同线程中处理回调的实现方式，如BackgroundThreadClientImpl和IoThreadClientImpl。每个步骤都揭示了WebView内部如何与第三方交互和处理native逻辑。

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在前面的webview创建过程分析（二）中我们分析了WebViewChromium的创建过程，在文章的最后我们把AwContents的创建过程先忽略了，在这篇文章里我们将接着前面的内容来分析AwContents的创建过程。先看下AwContents的构造函数代码

public AwContents(AwBrowserContext browserContext, ViewGroup containerView, Context context,
            InternalAccessDelegate internalAccessAdapter,
            NativeDrawFunctorFactory nativeDrawFunctorFactory, AwContentsClient contentsClient,
            AwSettings settings, DependencyFactory dependencyFactory) {
        try (ScopedSysTraceEvent e1 = ScopedSysTraceEvent.scoped("AwContents.constructor")) {
            mRendererPriority = RendererPriority.HIGH;
            mSettings = settings;
            updateDefaultLocale();

            mBrowserContext = browserContext;

            // setWillNotDraw(false) is required since WebView draws its own contents using its
            // container view. If this is ever not the case we should remove this, as it removes
            // Android's gatherTransparentRegion optimization for the view.
            mContainerView = containerView;
            mContainerView.setWillNotDraw(false);

            mContext = context;
            mAutofillProvider = dependencyFactory.createAutofillProvider(context, mContainerView);
            mAppTargetSdkVersion = mContext.getApplicationInfo().targetSdkVersion;
            mInternalAccessAdapter = internalAccessAdapter;
            mNativeDrawFunctorFactory = nativeDrawFunctorFactory;
            mContentsClient = contentsClient;
            mContentsClient.getCallbackHelper().setCancelCallbackPoller(
                    () -> AwContents.this.isDestroyedOrNoOperation(NO_WARN));
            mAwViewMethods = new AwViewMethodsImpl();
            mFullScreenTransitionsState = new FullScreenTransitionsState(
                    mContainerView, mInternalAccessAdapter, mAwViewMethods);
            mLayoutSizer = dependencyFactory.createLayoutSizer();
            mLayoutSizer.setDelegate(new AwLayoutSizerDelegate());

            //1.创建AwWebContentsDelegateAdapter
            mWebContentsDelegate = new AwWebContentsDelegateAdapter(
                    this, contentsClient, settings, mContext, mContainerView);

            //2.创建AwContentsClientBridge，用来包装contentsClient
            mContentsClientBridge = new AwContentsClientBridge(
                    mContext, contentsClient, AwContentsStatics.getClientCertLookupTable());

            //3.创建AwZoomControls
            mZoomControls = new AwZoomControls(this);