从 https://developer.chrome.com/devtools/docs/remote-debugging 我们可以知道在android 4.4+可以通过在apk中使用下面的代码开启webview的chrome远程调试
WebView.setWebContentsDebuggingEnabled(<spanclass="keyword">true</span>);
但我们开发中接触的apk往往是第三方的,没谁会为我们开启webContentsDebuggingEnabled。而Xposed能强制做到这一点
Xposed
Xposed能够勾住(Hook) Android应用程序对象的方法,实现AOP,一个简单的例子:
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<spanclass="keyword">public</span> <span class="keyword">class</span>WebViewHook<spanclass="keyword">implements</span>IXposedHookLoadPackage{
<spanclass="comment">// handleLoadPackage 会在android加载每一个apk后执行</span>
<spanclass="keyword">public</span>voidhandleLoadPackage(LoadPackageParamlpparam)throwsThrowable{
<spanclass="comment">// 可以从lpparam中获取当前apk的名字</span>
<spanclass="keyword">if</span> (! lpparam.packageName.equals(<span class="string">"com.tencent.mobileqq"</span>)){
<spanclass="keyword">return</span>;
}
XposedBridge.log(<span class="string">"WebViewHook handleLoadPackage: "</span>+lpparam.packageName);
<spanclass="comment">// 勾住 WebView 所有的构造器</span>
XposedBridge.hookAllConstructors(WebView.<spanclass="keyword">class</span>, <span class="keyword">new</span>XC_MethodHook(){
@Override
<spanclass="keyword">protected</span>voidbeforeHookedMethod(MethodHookParamparam)throwsThrowable{
<spanclass="comment">// 打开webContentsDebuggingEnabled</span>
XposedHelpers.callStaticMethod(WebView.<spanclass="keyword">class</span>, <span class="string">"setWebContentsDebuggingEnabled"</span>,<spanclass="keyword">true</span>);
XposedBridge.log(<span class="string">"WebViewHook new WebView(): "</span>+packageName);
}
});
}
}
上面的代码可以为QQ打开WebView的webContentsDebuggingEnabled
Xposed工作原理可以参考文档: https://github.com/rovo89/XposedBridge/wiki/Development-tutorial
没有详细的API页面, 因为API也就几个,可以查看源代码: https://github.com/rovo89/XposedBridge/tree/master/src/de/robv/android/xposed
馋图
拿来主义
1、需要android 4.4+ Root手机
2、安装 Xposed框架
3、已开启QQ WebView的Apk: webviewdebughook.Apk