Develop Reference

Open activity after clicking inside webview

How do we open an activity after clicking some specific link or button of a website which is from some website and open using webview?

Use shouldOverrideUrlLoading to give the host application a chance to take over the control when a new url is about to be loaded in the current WebView.
For more information shouldOverrideUrlLoading
Try this it will help you:
public class MyWebViewClient extends WebViewClient {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if (url.equals("url")) {
Intent intent = new Intent(contxt, YourActivity.class);
startActivity(intent);
return true; // Handle By application itself
} else {
view.loadUrl(url);
return true;
}
}
}

WebView back history without redirects

I implemented android webview and onKeyDown method for back key. (It implements webview.goBack();)
My problem is exactly similar to the question in this post below (no answers there)
How to control the Android WebView history/back stack?
PROBLEM - When I press back button, webview selects the previous URL, but if that URL was actually a redirect, it goes into this vicious cycle/loop. If you look at chrome or stock browser it correctly handles the back without going back to the redirects.
How can this be solved?
Example: go to gap.com. Then select "My Gap Credit Card". This opens a redirect link and then the final page. Now when I click back, it never goes to Gap.com home page.
Any suggestions...
Additional Information: I did implement the shouldOverrideUrlLoading. If I remove that method, it seems to work fine but with this method it does not...

I've just tested this on jellybean and it seems to work.
Essentially, whenever a new URL is loaded in the WebView keep a copy of the url.
On the next URL request, double check they we aren't already on this page, if they are, then go back in the webview history another step.
Essentially this is relying on the url passed into the override step being the redirected url, rather than the final redirected url.
public class MainActivity extends Activity {
private Button mRefreshButton;
private WebView mWebView;
private String mCurrentUrl;
public void onCreate(Bundle savedInstance) {
super.onCreate(savedInstance);
setContentView(R.layout.main);
mWebView = (WebView) findViewById(R.id.webview);
mRefreshButton = (Button) findViewById(R.id.refresh);
mRefreshButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
mWebView.reload();
}
});
WebSettings webSettings = mWebView.getSettings();
webSettings.setJavaScriptEnabled(true);
mWebView.setWebViewClient(new WebViewClient() {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if(mCurrentUrl != null && url != null && url.equals(mCurrentUrl)) {
mWebView.goBack();
return true;
}
view.loadUrl(url);
mCurrentUrl = url;
return true;
}
});
mWebView.loadUrl("http://www.gap.com/");
}
#Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if(event.getAction() == KeyEvent.ACTION_DOWN) {
switch(keyCode) {
case KeyEvent.KEYCODE_BACK:
if(mWebView.canGoBack()){
mWebView.goBack();
return true;
}
break;
}
}
return super.onKeyDown(keyCode, event);
}
}

I hope this answer if anyone is still looking for it.I had been hunting to fix similar issues in my project and had tried multiple approaches like using
- WebView.HitTestResult
- Pushing the urls into the list
- onKeyDown and so on...
I think most of it would work if your app consists of just webview. But my project had a combination of native and webview and handles some native schema.
Essentially found that the key is how you override the method shouldOverrideUrlLoading. Since i wanted my app to handles some of the urls and the webview to handle some of the other ones especially the back handling.I used a flag for back presses something like ..
#Override
public void onBackPressed() {
if (mWebView.canGoBack()) {
mClient.setIsBackPressed(true);
//mClient is an instance of the MyWebviewClient
mWebView.goBack();
} else {
super.onBackPressed();
}
}
public class MyWebviewClient extends WebViewClient {
private Boolean isBackPressed = false;
public void setIsBackPressed(Boolean isBackPressed) {
this.isBackPressed = isBackPressed;
}
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if (isBackPressed){
return false;
}
else {
// handle the url by implementing your logic
return true;
}
}
#Override
public void onPageFinished(WebView view, String url) {
isBackPressed = false;
super.onPageFinished(view, url);
}
}
In this way, whenever there is a redirect when you click back, then it return false and hence mocks the behaviour of the webview. At the same time, you make sure that the isBackPressed is set to false after the page finishes loading.
Hope this helps !!

how to navigate into activity using webview in android

I am doing one app. In this I am passing html file using WebView it is working good. But in html page I have some links. When I click that link means it is default going to website. But when I click that time no need to go to website. I need to go some activity like OnlineQuery.java. But I dnt knw how to move to that java file. any one knows please help me.
Java file:
public class DrugOffences extends Activity {
WebView mWebView;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.about);
WebView mWebView = null;
mWebView = (WebView) findViewById(R.id.webview);
mWebView.setBackgroundColor(Color.BLACK);
mWebView.getSettings().setJavaScriptEnabled(true);
mWebView.loadUrl("file:///android_asset/Drug.html");
}
}

Set a WebViewClient to your webview and override shouldOverrideUrlLoading. Check if the url to be loaded is the one you want to intercept. If it is do what you want and return true, if its not, return false.
webview.setWebViewClient(new WebViewClient() {
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if (url.equals("theURLYouDontWantToLoadInBrowser")) {
//Do your thing
startActivity(new Intent(this, OnlineQuery.class));
return true;
} else {
return false;
}
});

I don't understand at all your question, but if what you want is to handle the url navigation of the html load in the java code (webview), you could implement shouldOverrideUrlLoading (in this method you can intercept the url loadings) function.
Hope this helps

Try this..
Uri uri = Uri.parse("http://www.google.com");
Intent intent = new Intent(Intent.ACTION_VIEW, uri);
startActivity(intent);

Disabling intent to call

I have a webview that loads a html page saved in the assets folder of my android application. I have some phone numbers that when tapped I wouldn't want a call activity call invoked. I thought editing the activity permissions in the manifest would help, but that's long winded.

well, try to override URL and in case it cause calling , so return true or any thing else .. to do you will need to create an extended class from WebViewClient and set it in webview:
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
WebView webView=(WebView)findViewById(R.id.webv);
webView.setWebViewClient(new ImWebViewClient());
//.....
}
class ImWebViewClient extends WebViewClient{
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
//check the url and when it will come with your phone number return true ..
if(url!=null && url.contain("123456789"))
return true;
return false;//means apply other mime type if available, and this may by default cause calling your number...
}
}

Android : click link in a page within web view

I have included a web application within android web view , and there is a link in the webpage which opens some other site , when the link is clicked it works fine for the first click, however when clicked for the second time the website is not found ,
the code is :
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if (url.contains("some site ")) {
Intent i = new
Intent(Intent.ACTION_VIEW, Uri.parse(url));
startActivity(i);
return true;
} else {
view.loadUrl(url);
return false;
}
}
#THelper and #mikegr, thanks for the reply,
Actually in my case i have a modal panel (JSF) in my web application which contains some buttons, on clicking the button i am opening some other site using javascript window.open() method which works fine in desktop browser, however, when i wrap this web application within android webview, everything works fine except when i first click this button i'm able to open the other site using the external browser, however on second click the webview tries to open this othersite within the webview instead of the external browser and i get website not found with the entire URL of the other site, this happens even when i logout and login again as the application launched is still running.
also in my case after sometime when the application is idle i get the black screen.
i surfed through the net and found simillar issue but that didn't help either , here is the link:
http://groups.google.com/group/android-for-beginners/browse_thread/thread/42431dd1ca4a9d98
handling links in a webview ,
any help and ideas would be very helpful for me, this is taking too long for me,
since i'm trying to display my web application in the web view, i have only one activity, which contains code like this
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (savedInstanceState != null) {
// so that when launcher is clicked while the application is
// running , the application doesn't start from the begnining
} else {
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.main);
// Show the ProgressDialog on this thread
this.progressDialog = ProgressDialog.show(this, "Pleas Wait..", "Loading", true);
browser = (WebView) findViewById(R.id.webview);
browser.getSettings().setJavaScriptEnabled(true);
browser.setWebViewClient(new WebViewClient() {
public void onPageFinished(WebView view, String url) {
Log.i(TAG, "Finished loading URL: " +url);
if (progressDialog.isShowing()) {
progressDialog .dismiss();
}
}
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if (url.contains("some site")) {
Intent i = new
Intent(Intent.ACTION_VIEW, Uri.parse(url));
startActivity(i);
return true;
} else {
view.loadUrl(url);
return true;
}
}
});
browser.loadUrl("mysite");
}
}

I had the experience that shouldOverrideUrlLoading() is not called in certain circumstances.
There are a few bugs about this topic on
http://code.google.com/p/android/issues
like bug number 15827, 9122, 812, 2887
As a workaround try to add the method onPageStarted() and check if you get this call. For me this method is always called even if shouldOverrideUrlLoading() was not called before.

onPageStarted worked for me. Had to tweak it a bit, as that method is called when the webview is first rendered too, and I wanted to only execute it on the onClick of the banner's javascript.
I was simulating a banner with a custom page, so when the ad.html was being rendered, I avoided the startActivity. Otherwise, it launches the new browser window.
WebViewClient newWebClient = new WebViewClient() {
#Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
// TODO Auto-generated method stub
super.onPageStarted(view, url, favicon);
if(!url.equals("http://xxxx.ad.html"))
view.getContext().startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse(url)));
}
};

Try to append the System parameter pattern in url before you load that, something like.
String url = "http://xxxx.ad.html?t="+System.nanoTime();
and in your shouldOverrideUrlLoading() method remove the query part (in a very first line).
int idx;
if ((idx = url.indexOf("?")) != -1) {
url = url.substring(0, idx);
}