Get Redirected URL From Browser - Android

问题

Here's my problem I want to authorize my app from a user. for this the api provides me OAuth 2.0 process

I have a link " A " which contains my app key and my redirection link

eg. http://www.apiprovider?api-key=MY_API_KEY&redirect=REDIRECT_LINK

link A when opened in a browser asks for the users username and password and authorizes my app, after successful authorization the user is redirected to REDIRECT_LINK

the REDIRECT_LINK is encoded with a key which I need to store in a variable

eg. https://www.twitter.com/some_profile?key=Asc545AS454dS44as

I dont want the user to visit the redirect link, i just want to fetch the url and then close the browser, the page should not open.

I have used this code to open the link in a browser

Intent httpIntent = new Intent(Intent.ACTION_VIEW);
            httpIntent.setData(Uri.parse("LINK_A"));
            startActivity(httpIntent);

回答1:

If you open your page in WebView, you app can listen for any URL change with shouldOverrideUrlLoading() callback.

If you prefer to open the stock browser, you can start a service that will periodically poll the latest URL:

String lastDate = "0";
…
String newDate = Long.toString(Calendar.getInstance().getTimeInMillis());
Cursor cursor = context.getContentResolver().query(
    Browser.BOOKMARKS_URI,
    Browser.HISTORY_PROJECTION,
    Browser.BookmarkColumns.DATE + " IS NOT NULL AND " + Browser.BookmarkColumns.DATE + " > ?",
    lastDate,
    Browser.BookmarkColumns.DATE + " DESC");
if (cursor.moveToNext()) {
    String url = cursor.getString(Browser.HISTORY_PROJECTION_URL_INDEX);
}
cursor.close();

lastDate = newDate; // update the timestamp

When you find that the url matches your expected change, you can switch to your Activity and continue within the context of your app.

It is possible to close the browser, but it may not be polite, from the POV of your end-user. Imagine for example that she has 5 open tabs with important information, and all this is destroyed!

Note that this method can be used for Chrome browser, with slightly different content provider: content://com.android.chrome.browser/bookmarks

来源：https://stackoverflow.com/questions/16353973/get-redirected-url-from-browser-android

标签

java

android

xml

redirect

browser