Javascript 单击链接时从Android WebView中的锚定标记获取href值
我正在WebView中加载网页。网页中有一个链接,桌面上会下载该文件,但在应用程序中,该链接会显示一个祝酒词,表示该应用程序已禁用该链接 我不确定单击链接时如何从锚定标记的Javascript 单击链接时从Android WebView中的锚定标记获取href值,javascript,android,webview,android-webview,Javascript,Android,Webview,Android Webview,我正在WebView中加载网页。网页中有一个链接,桌面上会下载该文件,但在应用程序中,该链接会显示一个祝酒词,表示该应用程序已禁用该链接 我不确定单击链接时如何从锚定标记的href中获取值 <a class="btn btn-primary" download="http://xx.xxx.com/wp-content/uploads/2015/11/abc-27-15.mp3" href="http://xx.xxx.com/wp-content/uploads/2015/11/abc-
href
中获取值
<a class="btn btn-primary" download="http://xx.xxx.com/wp-content/uploads/2015/11/abc-27-15.mp3" href="http://xx.xxx.com/wp-content/uploads/2015/11/abc-27-15.mp3">
<i class="fa fa-download"></i> Download Audio</a>
这种方法的问题是:
当我点击链接时,我额外获得了url。在这里以前都很好用。但是,从下一次开始,无论我在哪里单击webview,都会返回相同的额外内容。因此,即使我在点击url后点击了一个图像,我也会在额外的页面中得到相同的url。不知道我是否做错了什么。或者这是正确的方法
如果你需要任何细节,请告诉我
编辑:2
private Handler mHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
// Get link-URL.
String url = (String) msg.getData().get("url");
// Do something with it.
if (url != null) {
Log.d(TAG, "URL: "+url);
}
}
};
webView.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
if (event.getAction() == MotionEvent.ACTION_DOWN) {
WebView.HitTestResult hr = ((WebView) v).getHitTestResult();
if (hr.getType() == WebView.HitTestResult.SRC_ANCHOR_TYPE) {
Message msg = mHandler.obtainMessage();
webView.requestFocusNodeHref(msg);
}
}
return false;
}
});
webView.loadUrl(mUrl);
}
现在,我得到上一个action_down事件中单击的URL。如何获取当前URL
编辑3(尝试使用webviewclient:
private class MyWebViewClient extends WebViewClient {
private static final String URL = "xx.xxx.com/wp-content/uploads/";
@Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
super.onPageStarted(view, url, favicon);
if (!isFinishing())
mProgressDialog.show();
}
@Override
public void onPageFinished(WebView view, String url) {
super.onPageFinished(view, url);
mProgressDialog.dismiss();
}
@Override
public void onReceivedError(WebView view, int errorCode,
String description, String failingUrl) {
super.onReceivedError(view, errorCode, description, failingUrl);
Toast.makeText(WebviewActivity.this,
"Please check your internet " + "connection and try again",
Toast.LENGTH_SHORT).show();
}
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
Log.d("xxx", "Url: " + url);
if(url.contains(URL)) {
Log.d("xxx", "Url Contains: " + URL);
return true;
}
return false;
}
}
mMyWebViewClient = new MyWebViewClient();
webView.setWebViewClient(mMyWebViewClient);
单击链接时在logcat中输出:
03-01 15:38:19.402 19626-19626/com.xx.xxx D/cr_Ime: [ImeAdapter.java:553] focusedNodeChanged: isEditable [false]
03-01 15:38:19.428 19626-19626/com.xx.xxx D/cr_Ime: [ImeAdapter.java:253] updateKeyboardVisibility: type [0->0], flags [0], show [true],
03-01 15:38:19.428 19626-19626/com.xx.xxx D/cr_Ime: [ImeAdapter.java:326] hideKeyboard
03-01 15:38:19.429 19626-19626/com.xx.xxx D/cr_Ime: [InputMethodManagerWrapper.java:56] isActive: true
03-01 15:38:19.429 19626-19626/com.xx.xxx D/cr_Ime: [InputMethodManagerWrapper.java:65] hideSoftInputFromWindow
大部分工作可以在网页端本身完成。如果移动设备正在访问页面,您必须编写java脚本来识别哪个设备(移动设备、桌面等),然后使用java脚本绑定技术调用本机android代码来显示Toast消息 WebAppInterface.java
public class WebAppInterface {
Context mContext;
/** Instantiate the interface and set the context */
WebAppInterface(Context c) {
mContext = c;
}
/** Show a toast from the web page */
@JavascriptInterface
public void showToast(String toast) {
Toast.makeText(mContext, toast, Toast.LENGTH_SHORT).show();
}
}
YourHTML页面(此示例获得了一个按钮点击)
函数showAndroidToast(toast){
showToast(toast);
}
因为您使用的是WebView,而链接不是Java脚本,所以使用WebView客户端很容易实现这一点,您可以使用它来监视您的WebView
myWebView.setWebViewClient( new WebViewClient() {
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
// check something unique to the urls you want to block
if (url.contains("xx.xxx.com")) {
Toast.make... //trigger the toast
return true; //with return true, the webview wont try rendering the url
}
return false; //let other links work normally
}
} );
可能是因为您的URL以.mp3结尾,所以该文件被视为资源。您还应该覆盖WebViewClient的shouldInterceptRequest
方法来检查这一点
@Override
@TargetApi(Build.VERSION_CODES.LOLLIPOP)
public WebResourceResponse shouldInterceptRequest(WebView view, WebResourceRequest request) {
String url = request.getUrl().toString();
Log.d("XXX", "Url from API21 shouldInterceptRequest : " + url);
if (url.contains(URL)) {
return new WebResourceResponse("text/html", "UTF-8", "<html><body>No downloading from app</body></html>");
} else {
return null;
}
}
public WebResourceResponse shouldInterceptRequest (WebView view, String url) {
Log.d("XXX", "Url from shouldInterceptRequest : " + url);
if (url.contains(URL)) {
return new WebResourceResponse("text/html", "UTF-8", "<html><body>No downloading from app</body></html>");
} else {
return null;
}
}
@覆盖
@TargetApi(Build.VERSION\u code.LOLLIPOP)
公共WebResourceResponse应该InterceptRequest(WebView视图、WebResourceRequest请求){
字符串url=request.getUrl().toString();
Log.d(“XXX”,“来自API21的Url应为interceptRequest:+Url”);
如果(url.contains(url)){
返回新的WebResourceResponse(“文本/html”、“UTF-8”、“不从应用程序下载”);
}否则{
返回null;
}
}
公共WebResourceResponse应InterceptRequest(WebView视图,字符串url){
Log.d(“XXX”,“来自shouldInterceptRequest的Url:+Url”);
如果(url.contains(url)){
返回新的WebResourceResponse(“文本/html”、“UTF-8”、“不从应用程序下载”);
}否则{
返回null;
}
}
很抱歉回复太晚。我从一开始就尝试过这种方法。但是,当我单击链接时,不会调用shouldOverrideUrlLoading。我获取url的唯一时间是我在问题代码示例中提到的在WebView上使用onTouchListener时。如果WebView客户端在WebView上设置正确,则获取url always导致调用该方法。如果是表单帖子,则情况并非如此,但您说的是锚定链接。您是否与触摸侦听器同时使用该方法?因为当您取消事件时,这当然不起作用。我使用WebViewClient更新了问题。请看一看。我没有同时使用这两种方法。首先,我尝试使用WebViewClient,但是,我无法从shouldOverrideUrlLoading获取url。因此,我尝试使用onTouchListener.private静态最终字符串url=“”;我正在shouldOverrideUrlLoading中记录它。@Override public boolean shouldOverrideUrlLoading(WebView视图,字符串url){Log.d(“xxx”,“url:+url”);if(url.contains(URL)){Log.d(“xxx”,“URL包含:”+URL);返回true;}返回false;}问题是当我单击链接时,我没有得到任何日志。没有URL或任何内容。使用LOGT更新问题此答案可能会有所帮助
<input type="button" value="Say hello" onClick="showAndroidToast('Hello
Android!')" />
<script type="text/javascript">
function showAndroidToast(toast) {
Android.showToast(toast);
}
</script>
myWebView.setWebViewClient( new WebViewClient() {
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
// check something unique to the urls you want to block
if (url.contains("xx.xxx.com")) {
Toast.make... //trigger the toast
return true; //with return true, the webview wont try rendering the url
}
return false; //let other links work normally
}
} );
@Override
@TargetApi(Build.VERSION_CODES.LOLLIPOP)
public WebResourceResponse shouldInterceptRequest(WebView view, WebResourceRequest request) {
String url = request.getUrl().toString();
Log.d("XXX", "Url from API21 shouldInterceptRequest : " + url);
if (url.contains(URL)) {
return new WebResourceResponse("text/html", "UTF-8", "<html><body>No downloading from app</body></html>");
} else {
return null;
}
}
public WebResourceResponse shouldInterceptRequest (WebView view, String url) {
Log.d("XXX", "Url from shouldInterceptRequest : " + url);
if (url.contains(URL)) {
return new WebResourceResponse("text/html", "UTF-8", "<html><body>No downloading from app</body></html>");
} else {
return null;
}
}