Android : Html Anchor Link works only once in webview

11,317

Solution 1

The problem was to Reload the Page again after Anchor link Click.

I have used the following code,

chapters.xml in Assets folder

<html>
<body>
<p><a href="#C4">See also Chapter 4</a></p>
<p><h2><a name='C1'>Chapter 1<a></h2><p>This chapter explains ba bla bla</p>
<h2>Chapter 2</h2><p>This chapter explains ba bla bla</p>
<h2>Chapter 3</h2><p>This chapter explains ba bla bla</p>
<h2><a name='C4'>Chapter 4</a></h2><p>This chapter explains ba bla bla</p>
<h2>Chapter 5</h2><p>This chapter explains ba bla bla</p>
<h2>Chapter 6</h2><p>This chapter explains ba bla bla</p>
<h2>Chapter 7</h2><p>This chapter explains ba bla bla</p>
<a href="#C1">See also Chapter 1</a>
</body>
</html>

JAVA code : First Way

public class MainActivity extends Activity {
    WebView myWebView;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        myWebView = new WebView(this);
        myWebView.getSettings().setJavaScriptEnabled(true);
        myWebView.loadUrl("file:///android_asset/chapters.html");

        setContentView(myWebView);

        final GestureDetector gestureDetector = new GestureDetector(
                new MyGestureDetector());
        View.OnTouchListener gestureListener = new View.OnTouchListener() {
            public boolean onTouch(View v, MotionEvent event) {
                return gestureDetector.onTouchEvent(event);
            }
        };
        myWebView.setOnTouchListener(gestureListener);
    }

    class MyGestureDetector extends SimpleOnGestureListener {
        @Override
        public boolean onSingleTapConfirmed(MotionEvent e) {
            myWebView.reload();
            Log.i("", "Reload");
            return super.onSingleTapConfirmed(e);

        }
    }
}

EDIT JAVA CODE : Second Way - I have tried this thing insted onTouchListener and that working fine for me.

public class MainActivity extends Activity {
    WebView myWebView;
    public static boolean flag = false;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        myWebView = new WebView(this);
        myWebView.getSettings().setJavaScriptEnabled(true);
        myWebView.loadUrl("file:///android_asset/chapters.html");
        setContentView(myWebView);
        myWebView.setWebViewClient(new WebViewClient() {
            public void onPageFinished(WebView view, String url) {
                if (url.contains("#") && flag == false) {
                    myWebView.loadUrl(url);
                    flag = true;
                } else {
                    flag = false;
                }
            }

        });
    }
}

To Open Another HTML File's Anchor Tag from One file

        myWebView = new WebView(this);
        myWebView.getSettings().setJavaScriptEnabled(true);
        myWebView.loadUrl("file:///android_asset/1.htm");
        myWebView.setWebViewClient(new WebViewClient() {
            @Override
            public boolean shouldOverrideUrlLoading(WebView view, String url) {
                try{
                chapter = url.substring(url.indexOf("#"),url.length());
                url = url.substring(0,url.indexOf("#"));
                }catch (Exception e) {
                    chapter = "";
                }
                myWebView.loadUrl(url);
                return true;
            }
            public void onPageFinished(WebView view, String url) {
                if (!chapter.equalsIgnoreCase("") && flag == false) {
                    myWebView.loadUrl(url+chapter);
                    flag = true;
                } else {
                    flag = false;
                }
            }
        });
        setContentView(myWebView);

Solution 2

Please try with this code . It works fine .

   String html = "<html><body><p><a href='#C4'>See also Chapter 4</a></p><p><h2>Chapter 1</h2><p>This chapter explains ba bla bla</p><h2>Chapter 2</h2><p>This chapter explains ba bla bla</p><h2>Chapter 3</h2><p>This chapter explains ba bla bla</p><h2><a name='C4'>Chapter 4</a></h2><p>This chapter explains ba bla bla</p><h2>Chapter 5</h2><p>This chapter explains ba bla bla</p><h2>Chapter 6</h2><p>This chapter explains ba bla bla</p><h2>Chapter 7</h2><p>This chapter explains ba bla bla</p><h2>Chapter 8</h2><p>This chapter explains ba bla bla</p><h2>Chapter 9</h2><p>This chapter explains ba bla bla</p></body></html>";
    String mime = "text/html";
    String encoding = "utf-8";

    final WebView myWebView = (WebView)this.findViewById(R.id.webView);
    myWebView.getSettings().setJavaScriptEnabled(true);
    myWebView.loadDataWithBaseURL("app:html", html, mime, encoding, null);

    myWebView.setWebViewClient(new WebViewClient() 
    {  
       @Override  
       public void onPageFinished(WebView view, String url) 
       {
           super.onPageFinished(view, "app:html");
           view.loadDataWithBaseURL("app:html", html, mime, encoding, null);
       }  
    });
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11,317
Mihir Palkhiwala
Author by

Mihir Palkhiwala

Sr. Mobile App Developer

Updated on June 23, 2022

Comments

  • Mihir Palkhiwala
    Mihir Palkhiwala over 1 year

    I am facing some strange issue in webview at time of loading html content with anchor link.
    Following code works perfect for anchor tag but only once.
    Second time when i press anchor tag it is not working.

    protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.mywebview);
    
            String html = "<html><body><p><a href='#C4'>See also Chapter 4</a></p><p><h2>Chapter 1</h2><p>This chapter explains ba bla bla</p><h2>Chapter 2</h2><p>This chapter explains ba bla bla</p><h2>Chapter 3</h2><p>This chapter explains ba bla bla</p><h2><a name='C4'>Chapter 4</a></h2><p>This chapter explains ba bla bla</p><h2>Chapter 5</h2><p>This chapter explains ba bla bla</p><h2>Chapter 6</h2><p>This chapter explains ba bla bla</p><h2>Chapter 7</h2><p>This chapter explains ba bla bla</p><h2>Chapter 8</h2><p>This chapter explains ba bla bla</p><h2>Chapter 9</h2><p>This chapter explains ba bla bla</p></body></html>";
            String mime = "text/html";
            String encoding = "utf-8";
    
            WebView myWebView = (WebView)this.findViewById(R.id.webView1);
            myWebView.loadDataWithBaseURL(null, html, mime, encoding, null);
    
        }
    

    i have tried this link but not worked for me.

    UPDATE:

    Testing result of my code in various device.

    Working
    1. Samsung S Plus --> 2.3.4
    2. Samsung Galaxy Y --> 2.3.6
    3. Samsung Galaxy Tab --> 2.3.3
    4. Motorola Xoom --> 3.2

    Not Working
    1. LG Optimus --> 2.2
    2. DELL XCD35(ZTE Blade) --> 2.2
    3. HTC WildFire --> 2.2.1

    Is this OS issue or something else? Any Solution for this??