如何在WebView中链接html文件?

问题描述：

我有一个很大的htm文件文件夹和一个HTML文件，其中的href链接到每个htm文件.我想创建一个供个人使用的android应用程序，以使在平板电脑上浏览这些文件更加容易.

I have a huge folder of htm files and a single html file with a href links to each of these htm files. I would like to create an android app, for personal use, to make browsing these files easier on a tablet.

我设法将主要html文件加载到Android Studio中的WebView，但是单击任何URL都会导致崩溃，因此我无法通过html目录加载任何htm文件.

I managed to load the main html file to WebView in Android Studio, but clicking any URL results in a crash, therefore I can't load any htm file through my html catalog.

我在android编程方面没有经验，从html和一些css就足够了，所以我在网站创建方面只有一些过时的经验，所以我尝试运用自己的直觉.我可能会遗漏一些非常明显的东西，但是我没有设法解决我的问题.

I am not experienced in android programming, I only have some out-of-date experience in website creation back from the days when html with some css was enough, so I try to use my intuition. I might be missing something very obvious, but I didn't manage to solve my issue.

也许您可以为我提供帮助?是否可以通过WebView中的href在html文件之间重定向?还是有一种简单的方法可以绕过它?不幸的是，从头开始编码目录是毫无疑问的-有成千上万个htm文件.欢迎任何建议.

Maybe you'll be able to help me? Is it possible to redirect between html files via a href in WebView? Or maybe there is a simple way to bypass it? Coding the catalog from scratch is unfortunately out of question - there are thousands of htm files. Any suggestions are welcome.

我的代码如下:

MainActivity.java

package a.my.app4;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.webkit.WebView;

import java.nio.channels.WritableByteChannel;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        WebView webz=(WebView)findViewById(R.id.web1);
        webz.loadUrl("file:///android_asset/index.html");

    }
}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <WebView
        android:id="@+id/web1"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true"
        android:layout_marginBottom="0dp"    />
</RelativeLayout>

index.html只是正文部分中href链接的巨大列表.它已正确加载到WebView，即使来自css文件的简单格式也是正确的，但是单击链接会导致崩溃.有成千上万的这样的行:

index.html is just a huge list of a href links in the body section. It is loaded correctly to the WebView, even the simple formatting from css files is correct, but clicking the links leads to a crash. There are thousands of lines like that:

<a href="view-1.htm" title="file description">file title</a>

我也尝试过以这种方式更改它(这可能会影响成千上万行...)，但是它也不起作用:

I also tried changing it that way (which would be problematic with thousands of lines...) but it didn't work either:

<a href="file:///android_asset/view-1.htm" title="file description">file title</a>

所有文件都在资产文件夹中.

All the files are in the assets folder.

答

您需要设置StrictMode策略才能公开URI(在您的情况下为 view-1.html ).您可以达到所需的结果，如下所示:

You need to set the StrictMode policy in order to expose the URI (in your case view-1.html). You can achieve your desired result as follows:

MainActivity.java

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    StrictMode.VmPolicy.Builder builder = new StrictMode.VmPolicy.Builder();
    StrictMode.setVmPolicy(builder.build());
    WebView webView = findViewById(R.id.wvWebView);
    webView.getSettings().setJavaScriptEnabled(true);
    webView.loadUrl("file:///android_asset/index.html");
}

index.html

<html>
<body>
   <H1>Hello</H1>
   <a href="view1.html" title="file description">file title</a>
 </body>
</html>

view1.html

<html>
<body>
   <H1>Hello View 1</H1>
 </body>
</html>

如何在WebView中链接html文件?

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