問題描述

在使用webview的時候發現，app在第一次啟動帶有webview的fragment的時候響應很慢，而后續再次開啟卻不是同樣慢

05-05 20:57:18.721 I/WebViewFactory: Loading com.google.android.webview version 51.0.2704.81 (code 270408150)05-05 20:57:18.897 W/System: ClassLoader referenced unknown path: /system/app/WebViewGoogle/lib/arm6405-05 20:57:18.919 I/cr_LibraryLoader: Time to load native libraries: 14 ms (timestamps 7291-7305)05-05 20:57:18.919 I/cr_LibraryLoader: Expected native library version number '51.0.2704.81', actual native library version number '51.0.2704.81'05-05 20:57:18.939 V/WebViewChromiumFactoryProvider: Binding Chromium to main looper Looper (main, tid 1) {20922c4}05-05 20:57:18.940 I/cr_LibraryLoader: Expected native library version number '51.0.2704.81', actual native library version number '51.0.2704.81'05-05 20:57:18.941 I/chromium: [INFO:library_loader_hooks.cc(143)] Chromium logging enabled: level = 0, default verbosity = 005-05 20:57:19.015 I/cr_BrowserStartup: Initializing chromium process, singleProcess=true05-05 20:57:19.153 E/ActivityThread: Failed to find provider info for com.google.settings05-05 20:57:19.197 D/cr_Ime: [InputMethodManagerWrapper.java:30] Constructor05-05 20:57:19.210 W/cr_AwContents: onDetachedFromWindow called when already detached. Ignoring05-05 20:57:19.211 D/cr_Ime: [InputMethodManagerWrapper.java:59] isActive: false05-05 20:57:19.217 D/EgretLoader: EgretLoader(Context context)05-05 20:57:19.224 D/EgretLoader: The context is not activity

查看logcat發現只有第一次加載的時候會執行上方這些操作，有什么辦法可以提高第一次打開webview的響應速度嗎？

問題解答

webview也是一個瀏覽器，需要下載文件，后面有了緩存自然變快。

優化不外乎按需加載，壓縮之類的。基本瀏覽器可以用的優化，這里也用上就好了。

可以預開啟webview并設置1像素的高和寬，并且預加載很多靜態資源，國內有不少app就是這樣做的，用戶體驗非常好。