Blazin: Communicating between an activity and the browser - callback

A few days ago bhushan made an article about communicating between activites. 

I'm currently working on a pet project that uses Oauth with the google data api, where

I had to get a response from the browser, so let's take a look at communicating between 

an activity and a browser.

All the tutorials that I found on the net use onResume to get the response, 

but I can't recommend that, because onResume runs even on the first run 

of the app (see lifecycle) which is unnecessary in this case.

To sum up the logic:

• open the browser with a callback url provided
• user enters credentials
• the callback will take the result info back to the app that called the browser.

Opening the browser:
We need to use a service that uses browser callback, for example Google data api (Oauth) via Signpost.

1. ...
2. String url = provider.retrieveRequestToken(consumer, "putyourappnamehere:///");
3. startActivity(new Intent(Intent.ACTION_VIEW, url));  
4. ...
   1. protected void onNewIntent(Intent intent) {
   2.   super.onNewIntent(intent);
   3.   setIntent(intent);//must store the new intent so getIntent() won't return the old one
   4.   processResponse()
   5. }
   7. private void processResponse(){
   8.   Intent intent = getIntent();
   9.   Uri uri = this.getIntent().getData();  //get your data here
   10. }
   You also need an intent filter in the manifest, that will "catch" the response.

1. ...
2. <intent-filter>  
3. <action android:name="android.intent.action.VIEW"></action>  
4. <category android:name="android.intent.category.DEFAULT"></category>  
5. <category android:name="android.intent.category.BROWSABLE"></category>  
6. <data android:scheme="putyourappnamehere"></data>
7. </intent-filter>
8. ...