Using OAuth with Scribe on Android

Question

Hi, I am using an email library to communicate OAuth with LInkedIn.

I have a login class and a query class.

The login class creates a service to receive my request token and privacy and creates my access token. Then the access token is saved in the settings file. This seems to work fine, and I can make a successful api call after creating all the tokens.

In my OAuth request class, I get an access token, create another service and try to make an API call, but when I ever load an action that invokes calls to this class, my application crashes. I tested to make sure the access token is saved, and they are.

Here is my entry class

public class Login_LinkedIn extends Activity { SharedPreferences settings; OAuthService service; Token requestToken; Button home; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.webauth); initControls(); service = new ServiceBuilder() .provider(LinkedInApi.class) .apiKey( getString(R.string.apiKey) ) .apiSecret( getString(R.string.secKey) ) .callback( getString(R.string.callBack) ) .build(); requestToken = service.getRequestToken(); final String authURL = service.getAuthorizationUrl(requestToken); final WebView webview = (WebView) findViewById(R.id.webView); //attach WebViewClient to intercept the callback url webview.setWebViewClient(new WebViewClient() { @Override public boolean shouldOverrideUrlLoading(WebView view, String url) { //check for our custom callback protocol //otherwise use default behavior if(url.startsWith( getString(R.string.callBack) )) { //authorization complete hide webview for now. webview.setVisibility(View.GONE); Uri uri = Uri.parse(url); String verifier = uri.getQueryParameter("oauth_verifier"); Verifier v = new Verifier(verifier); //save this token for practical use. Token accessToken = service.getAccessToken(requestToken, v); OAuthRequest request = new OAuthRequest(Verb.GET, "http://api.linkedin.com/v1/people/~:(first-name,last-name)"); service.signRequest(accessToken, request); Response response = request.send(); xmlHandler xh = new xmlHandler(response.getBody()); settings = getSharedPreferences("preferences", 0); SharedPreferences.Editor editor = settings.edit(); editor.putString("accessToken", accessToken.getToken()); // The requestToken is saved for use later on to verify the OAuth request. // See onResume() below editor.putString("requestToken", requestToken.getToken()); editor.putString("requestSecret", requestToken.getSecret()); editor.putString("first-name", xh.getValue("first-name")); editor.putString("last-name", xh.getValue("last-name")); editor.commit(); return true; } return super.shouldOverrideUrlLoading(view, url); } }); //send user to authorization page webview.loadUrl(authURL); } @Override protected void onResume() { super.onResume(); Intent i = getIntent(); if(i != null) { Uri uri = i.getData(); if(uri != null) { String oauthVerifier = uri.getQueryParameter("oauth_verifier"); Verifier verifier = new Verifier(oauthVerifier); requestToken = new Token(settings.getString("requestToken", null), settings.getString("requestSecret", null)); Token accessToken = service.getAccessToken(requestToken, verifier); // Save the access token. SharedPreferences.Editor editor = settings.edit(); editor.remove("requestToken"); editor.remove("requestSecret"); editor.putString("accessToken", accessToken.getToken()); editor.putString("accessSecret", accessToken.getSecret()); editor.commit(); // Start the film list activity. final Intent intent = new Intent(this,ProConnect.class); intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); startActivity(intent); } } } private void initControls() { home = (Button)findViewById(R.id.home); final Intent intent = new Intent(this,ProConnect.class); intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); home.setOnClickListener(new Button.OnClickListener() { public void onClick (View v) { startActivity(intent); } }); } } 

and my request class

 public class oAuthQuery extends Activity { OAuthService service; Token accessToken; SharedPreferences settings; public oAuthQuery() { service= new ServiceBuilder() .provider(LinkedInApi.class) .apiKey( getString(R.string.apiKey) ) .apiSecret( getString(R.string.secKey) ) .callback( getString(R.string.callBack) ) .build(); settings = getSharedPreferences("preferences", 0); accessToken = new Token(settings.getString("accessToken", null), settings.getString("accessSecret", null)); } public String query(String s) { OAuthRequest request = new OAuthRequest(Verb.GET, s); service.signRequest(accessToken, request); Response response = request.send(); return response.getBody(); } public OAuthService getService() { return service; } } 

Thanks for any help Jeff

Answer 1

I solved the problem, after all, it was something stupid. I edited my code to keep the access secret and access token, but forgot to re-register when testing my application on my phone. This led to the fact that the code that retained parts of the token was not reached.

I'm still having a challenge invoking the LinkedIn API

 invite.setOnClickListener(new Button.OnClickListener() { public void onClick (View v) { inviteXml = inviteCreator.inviteString(to, subj, body, authName, authValue); nameField.setText(inviteXml); titleField.setText(""); call = "http://api.linkedin.com/v1/people/~/mailbox"; request = new OAuthRequest(Verb.GET, call); request.addPayload(inviteXml); service.signRequest(accessToken, request); response = request.send(); invite.setVisibility(View.GONE); } }); 

I am not sure if this is the correct way to add an XML string to the call. The LinkedIn API does not indicate how it should be added. Anyone have experience with this?