mobile-services-android-authenticate-app.md

1. In the Package Explorer in Eclipse, open the ToDoActivity.java file and add the following import statements.

    import com.microsoft.windowsazure.mobileservices.MobileServiceUser;
    import com.microsoft.windowsazure.mobileservices.MobileServiceAuthenticationProvider;
    import com.microsoft.windowsazure.mobileservices.UserAuthenticationCallback;
   

2. Add the following method to the ToDoActivity class:

    private void authenticate() {
    
    	// Login using the Google provider.
    	mClient.login(MobileServiceAuthenticationProvider.Google,
    			new UserAuthenticationCallback() {
   
    				@Override
    				public void onCompleted(MobileServiceUser user,
    						Exception exception, ServiceFilterResponse response) {
   
    					if (exception == null) {
    						createAndShowDialog(String.format(
    										"You are now logged in - %1$2s",
    										user.getUserId()), "Success");
    						createTable();
    					} else {
    						createAndShowDialog("You must log in. Login Required", "Error");
    					}
    				}
    			});
    }
   

   This creates a new method to handle the authentication process. The user is authenticated by using a Google login. A dialog is displayed which displays the ID of the authenticated user. You cannot proceed without a positive authentication.

   Note

   If you are using an identity provider other than Google, change the value passed to the login method above to one of the following: MicrosoftAccount, Facebook, Twitter, or windowsazureactivedirectory.

3. In the onCreate method, add the following line of code after the code that instantiates the MobileServiceClient object.

    authenticate();
   

   This call starts the authentication process.

4. Move the remaining code after authenticate(); in the onCreate method to a new createTable method, which looks like this:

    private void createTable() {
   
    	// Get the Mobile Service Table instance to use
    	mToDoTable = mClient.getTable(ToDoItem.class);
   
    	mTextNewToDo = (EditText) findViewById(R.id.textNewToDo);
   
    	// Create an adapter to bind the items with the view
    	mAdapter = new ToDoItemAdapter(this, R.layout.row_list_to_do);
    	ListView listViewToDo = (ListView) findViewById(R.id.listViewToDo);
    	listViewToDo.setAdapter(mAdapter);
   
    	// Load the items from the Mobile Service
    	refreshItemsFromTable();
    }
   

5. From the Run menu, then click Run to start the app and sign in with your chosen identity provider.

   When you are successfully logged-in, the app should run without errors, and you should be able to query Mobile Services and make updates to data.