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android - 在牛轧糖的 webview 中导航基于 Assets 的 html 文件

转载 作者:塔克拉玛干 更新时间:2023-11-02 20:27:11 26 4
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我正在将 Assets 中的 HTML 文件加载到 Web View 中。

html 有指向其他 html Assets 文件的链接。单击链接在 SDK < 24 上可以正常工作,但在 Nougat (SDK 24) 设备上单击指向第二个 html 页面的链接时会产生 FileUriExposedException 错误。

将 Assets 中的 html 加载到 Web View 中的代码:

wbHelp.loadDataWithBaseURL("file:///android_asset/", readAssetFileAsString("Index.html"), "text/html", "UTF-8", null);

readAssetFileAsString 是:

private String readAssetFileAsString(String sourceHtmlLocation)
{
InputStream is;
try
{
is = getContext().getAssets().open(sourceHtmlLocation);
int size = is.available();

byte[] buffer = new byte[size];
is.read(buffer);
is.close();

return new String(buffer, "UTF-8");
}
catch(IOException e)
{
e.printStackTrace();
}

return "";
}

html 可以非常基础。索引.html

<html><a href="Page2.html">Page 2</a></html>

Page2.html

<html><h1>Page 2</h1>

完整的错误日志是:

11-12 17:58:03.694 5831-5831/appname W/System.err: android.os.FileUriExposedException: file:///android_asset/Page2.html exposed beyond app through Intent.getData()
11-12 17:58:03.694 5831-5831/appname W/System.err: at android.os.StrictMode.onFileUriExposed(StrictMode.java:1799)
11-12 17:58:03.694 5831-5831/appname W/System.err: at android.net.Uri.checkFileUriExposed(Uri.java:2346)
11-12 17:58:03.694 5831-5831/appname W/System.err: at android.content.Intent.prepareToLeaveProcess(Intent.java:8933)
11-12 17:58:03.694 5831-5831/appname W/System.err: at android.content.Intent.prepareToLeaveProcess(Intent.java:8894)
11-12 17:58:03.694 5831-5831/appname W/System.err: at android.app.Instrumentation.execStartActivity(Instrumentation.java:1517)
11-12 17:58:03.694 5831-5831/appname W/System.err: at android.app.Activity.startActivityForResult(Activity.java:4224)
11-12 17:58:03.694 5831-5831/appname W/System.err: at android.support.v4.app.BaseFragmentActivityJB.startActivityForResult(BaseFragmentActivityJB.java:48)
11-12 17:58:03.694 5831-5831/appname W/System.err: at android.support.v4.app.FragmentActivity.startActivityForResult(FragmentActivity.java:77)
11-12 17:58:03.694 5831-5831/appname W/System.err: at android.app.Activity.startActivityForResult(Activity.java:4183)
11-12 17:58:03.695 5831-5831/appname W/System.err: at android.support.v4.app.FragmentActivity.startActivityForResult(FragmentActivity.java:859)
11-12 17:58:03.695 5831-5831/appname W/System.err: at android.app.Activity.startActivity(Activity.java:4507)
11-12 17:58:03.695 5831-5831/appname W/System.err: at android.app.Activity.startActivity(Activity.java:4475)
11-12 17:58:03.695 5831-5831/appname W/System.err: at android.content.ContextWrapper.startActivity(ContextWrapper.java:356)
11-12 17:58:03.695 5831-5831/appname W/System.err: at org.chromium.android_webview.ResourcesContextWrapperFactory$WebViewContextWrapper.startActivity(ResourcesContextWrapperFactory.java:121)
11-12 17:58:03.695 5831-5831/appname W/System.err: at org.chromium.android_webview.AwContentsClient.sendBrowsingIntent(AwContentsClient.java:203)
11-12 17:58:03.695 5831-5831/appname W/System.err: at org.chromium.android_webview.AwContentsClient.shouldIgnoreNavigation(AwContentsClient.java:170)
11-12 17:58:03.695 5831-5831/appname W/System.err: at org.chromium.android_webview.AwContentsClientBridge.shouldOverrideUrlLoading(AwContentsClientBridge.java:256)
11-12 17:58:03.695 5831-5831/appname W/System.err: at org.chromium.base.SystemMessageHandler.nativeDoRunLoopOnce(Native Method)
11-12 17:58:03.695 5831-5831/appname W/System.err: at org.chromium.base.SystemMessageHandler.handleMessage(SystemMessageHandler.java:39)
11-12 17:58:03.695 5831-5831/appname W/System.err: at android.os.Handler.dispatchMessage(Handler.java:102)
11-12 17:58:03.695 5831-5831/appname W/System.err: at android.os.Looper.loop(Looper.java:154)
11-12 17:58:03.695 5831-5831/appname W/System.err: at android.app.ActivityThread.main(ActivityThread.java:6077)
11-12 17:58:03.695 5831-5831/appname W/System.err: at java.lang.reflect.Method.invoke(Native Method)
11-12 17:58:03.695 5831-5831/appname W/System.err: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865)
11-12 17:58:03.695 5831-5831/appname W/System.err: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)
11-12 17:58:03.699 5831-5831/appname A/chromium: [FATAL:jni_android.cc(236)] Please include Java exception stack in crash report


--------- beginning of crash
11-12 17:58:03.856 5831-5831/appname W/google-breakpad: ### ### ### ### ### ### ### ### ### ### ### ### ###
11-12 17:58:03.856 5831-5831/appname W/google-breakpad: Chrome build fingerprint:
11-12 17:58:03.856 5831-5831/appname W/google-breakpad: 1.0
11-12 17:58:03.856 5831-5831/appname W/google-breakpad: 72
11-12 17:58:03.856 5831-5831/appname W/google-breakpad: ### ### ### ### ### ### ### ### ### ### ### ### ###
11-12 17:58:03.857 5831-5831/appname A/libc: Fatal signal 6 (SIGABRT), code -6 in tid 5831 (appname)

[ 11-12 17:58:03.857 270: 270 W/ ]
debuggerd: handling request: pid=5831 uid=10379 gid=10379 tid=5831

我试过使用某种形式的提供程序(例如在这个答案中:android.os.FileUriExposedException: file:///storage/emulated/0/test.txt exposed beyond app through Intent.getData())但它没有任何效果。

最佳答案

按照@CommonsWare here 的建议,我能够通过使用 shouldOverrideUrlLoading 来克服异常。 :

在运行 Nougat 的模拟器上测试:

    web.setWebViewClient(new WebViewClient()
{
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url)
{
Log.i("WebView", "Attempting to load URL: " + url);

view.loadUrl(url);
return true;
}
});

关于android - 在牛轧糖的 webview 中导航基于 Assets 的 html 文件,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/40560604/

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