android webkit 初始化流程

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以android 4.2為例

1, android 4.2中 WebViewClassic.java 為 WebView.java的代理類.

2,程式運行後,瀏覽器首先載入webkit so.

    WebViewCore.java ,apk 運行後只載入一次.

    static {

      // Load libwebcore and libchromium_net during static initialization.

      // This happens in the zygote process so they will be shared read-only

      // across all app processes.

      try {

        System.loadLibrary("chromium_net");

        System.loadLibrary("webcore");

      } catch (UnsatisfiedLinkError e) {

    Log.e(LOGTAG, "Unable to load native support libraries.");

    }

3,loadLibary 後則會初始化對應的JNI.將framwork 層webkit與c++ 層關聯對應起來.

  主要處理在 WebCoreJniOnLoad.cpp

 

static RegistrationMethod gWebCoreRegMethods[] = {

{ "JavaBridge", android::registerJavaBridge },

{ "WebFrame", android::registerWebFrame },

{ "WebViewCore", android::registerWebViewCore },

{ "WebHistory", android::registerWebHistory },

{ "WebIconDatabase", android::registerWebIconDatabase },

{ "WebSettingsClassic", android::registerWebSettings },

#if ENABLE(DATABASE)

{ "WebStorage", android::registerWebStorage },

#endif

{ "WebView", android::registerWebView },

{ "ViewStateSerializer", android::registerViewStateSerializer },

{ "GeolocationPermissions", android::registerGeolocationPermissions },

{ "MockGeolocation", android::registerMockGeolocation },

#if ENABLE(VIDEO)

{ "HTML5Audio", android::registerMediaPlayerAudio },

{ "HTML5VideoViewProxy", android::registerMediaPlayerVideo },

#endif

{ "DeviceMotionAndOrientationManager", android::registerDeviceMotionAndOrientationManager },

{ "CookieManager", android::registerCookieManager },

{ "CacheManager", android::registerCacheManager },

 

};


4.建立WebView:

    webview1= (WebView) findViewById(R.id.WebView1);

    該行調用後,則會初始webkit,java 及c++層的關鍵類.


 


android webkit 初始化流程

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