Intercepting links from the browser to open my Android app

Use an android.intent.action.VIEW of category android.intent.category.BROWSABLE.

From Romain Guy's Photostream app's AndroidManifest.xml,

    <activity        android:name=".PhotostreamActivity"        android:label="@string/application_name">        <!-- ... -->                    <intent-filter>            <action android:name="android.intent.action.VIEW" />            <category android:name="android.intent.category.DEFAULT" />            <category android:name="android.intent.category.BROWSABLE" />            <data android:scheme="http"                  android:host="flickr.com"                  android:pathPrefix="/photos/" />            <data android:scheme="http"                  android:host="www.flickr.com"                  android:pathPrefix="/photos/" />        </intent-filter>    </activity>

Once inside you're in the activity, you need to look for the action, and then do something with the URL you've been handed. The Intent.getData() method gives you a Uri.

    final Intent intent = getIntent();    final String action = intent.getAction();    if (Intent.ACTION_VIEW.equals(action)) {        final List<String> segments = intent.getData().getPathSegments();        if (segments.size() > 1) {            mUsername = segments.get(1);        }    }

It should be noted, however, that this app is getting a little bit out of date (1.2), so you may find there are better ways of achieving this.

There are some libraries parse parameters from url automatically.

such as

https://github.com/airbnb/DeepLinkDispatch

&&

https://github.com/mzule/ActivityRouter

The later one is wrote by me. Which can parse parameters to given type, not always String.

Example

@Router(value = "main/:id" intExtra = "id")...int id = getIntent().getInt("id", 0);

private class MyWebViewClient extends WebViewClient {    @Override    public boolean shouldOverrideUrlLoading(WebView view, String url) {        setUrlparams(url);        if (url.indexOf("pattern") != -1) {            // do something            return false;        } else {            view.loadUrl(url);        }        return true;    }}