我怎样才能得到的WebView onclick事件在android系统？ [英] How can I get onclick event on webview in android?

问题描述

我想，当用户点击的WebView但不是一个超链接就知道了。上单击想要显示/隐藏我的活动保存网页视图的视图。任何建议？

I want to know when the user clicks on webview but not on a hyperlink. On that click I want to show/hide a view of my activity that holds a webview. Any suggestion?

推荐答案

我看了看这一点，我发现一个的WebView 似乎并没有发送点击事件到 OnClickListener 。如果有任何人能证明我错了，或告诉我，为什么那么我很想听到它。

I took a look at this and I found that a WebView doesn't seem to send click events to an OnClickListener. If anyone out there can prove me wrong or tell me why then I'd be interested to hear it.

我确实发现是，的WebView 将触摸事件发送到 OnTouchListener 。它也有自己的 onTouchEvent 方法，但我只好像使用方法 MotionEvent.ACTION_MOVE 就搞定了。

What I did find is that a WebView will send touch events to an OnTouchListener. It does have its own onTouchEvent method but I only ever seemed to get MotionEvent.ACTION_MOVE using that method.

所以，因为我们可以得到一个注册触摸事件监听器事件，剩下唯一的问题是如何绕过你想要的任何行动，以便在触摸执行，当用户点击的URL。

So given that we can get events on a registered touch event listener, the only problem that remains is how to circumvent whatever action you want to perform for a touch when the user clicks a URL.

这可以用一些花哨处理程序步法通过发送延迟的消息触摸，然后删除那些触摸消息如果触摸被用户点击的URL引起来实现。

This can be achieved with some fancy Handler footwork by sending a delayed message for the touch and then removing those touch messages if the touch was caused by the user clicking a URL.

下面是一个例子：

public class WebViewClicker extends Activity implements OnTouchListener, Handler.Callback {

private static final int CLICK_ON_WEBVIEW = 1;
private static final int CLICK_ON_URL = 2;

private final Handler handler = new Handler(this);

private WebView webView;
private WebViewClient client;

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

    webView = (WebView)findViewById(R.id.web);
    webView.setOnTouchListener(this);

    client = new WebViewClient(){ 
        @Override public boolean shouldOverrideUrlLoading(WebView view, String url) { 
            handler.sendEmptyMessage(CLICK_ON_URL);
            return false;
        } 
    }; 

    webView.setWebViewClient(client);
    webView.setVerticalScrollBarEnabled(false);
    webView.loadUrl("http://www.example.com");
}

@Override
public boolean onTouch(View v, MotionEvent event) {
    if (v.getId() == R.id.web && event.getAction() == MotionEvent.ACTION_DOWN){
        handler.sendEmptyMessageDelayed(CLICK_ON_WEBVIEW, 500);
    }
    return false;
}

@Override
public boolean handleMessage(Message msg) {
    if (msg.what == CLICK_ON_URL){
        handler.removeMessages(CLICK_ON_WEBVIEW);
        return true;
    }
    if (msg.what == CLICK_ON_WEBVIEW){
        Toast.makeText(this, "WebView clicked", Toast.LENGTH_SHORT).show();
        return true;
    }
    return false;
}
}

希望这有助于。

Hope this helps.

这篇关于我怎样才能得到的WebView onclick事件在android系统？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！