integration - Posting LinkedIn message from Android application

Question

I want to integrate my Android application with LinkedIn and post a message. Can anyone provide an example for how to do this?

Answer 1

did you even try google it ? from http://developer.linkedin.com/docs/DOC-1255 we got http://code.google.com/p/linkedin-j/

EDIT: here is my sample project http://esilo.pl/LITest.zip

EDIT2: minimal sample, with tokens stored in SharedPreferences (so you don't need to do authorization every time(i'll update LITest.zip))

EDIT3: AsyncTask code added ... to avoid NetworkOnMainThreadException :)

AndroidManifest.xml:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="pl.selvin.android.LinkedInTest"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk android:minSdkVersion="4" />

    <uses-permission android:name="android.permission.INTERNET" />

    <application android:label="LinkedInTest" >
        <activity
            android:name=".LITestActivity"
            android:label="LinkedIn Test"
            android:launchMode="singleInstance" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
            <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:host="litestcalback"
                    android:scheme="x-oauthflow-linkedin" />
            </intent-filter>
        </activity>
    </application>

</manifest>

LITestActivity.java:

package pl.selvin.android.LinkedInTest;

import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Bundle;
import android.widget.TextView;
import android.widget.Toast;

import com.google.code.linkedinapi.client.LinkedInApiClient;
import com.google.code.linkedinapi.client.LinkedInApiClientException;
import com.google.code.linkedinapi.client.LinkedInApiClientFactory;
import com.google.code.linkedinapi.client.oauth.LinkedInAccessToken;
import com.google.code.linkedinapi.client.oauth.LinkedInOAuthService;
import com.google.code.linkedinapi.client.oauth.LinkedInOAuthServiceFactory;
import com.google.code.linkedinapi.client.oauth.LinkedInRequestToken;
import com.google.code.linkedinapi.schema.Person;

public class LITestActivity extends Activity {

    // /change keysssssssssssssssssssssssssssss!!!!!!!!!!

    static final String CONSUMER_KEY = "keykeykeykey";
    static final String CONSUMER_SECRET = "secretsecret";

    static final String APP_NAME = "LITest";
    static final String OAUTH_CALLBACK_SCHEME = "x-oauthflow-linkedin";
    static final String OAUTH_CALLBACK_HOST = "litestcalback";
    static final String OAUTH_CALLBACK_URL = String.format("%s://%s",
            OAUTH_CALLBACK_SCHEME, OAUTH_CALLBACK_HOST);
    static final String OAUTH_QUERY_TOKEN = "oauth_token";
    static final String OAUTH_QUERY_VERIFIER = "oauth_verifier";
    static final String OAUTH_QUERY_PROBLEM = "oauth_problem";

    final LinkedInOAuthService oAuthService = LinkedInOAuthServiceFactory
            .getInstance().createLinkedInOAuthService(CONSUMER_KEY,
                    CONSUMER_SECRET);
    final LinkedInApiClientFactory factory = LinkedInApiClientFactory
            .newInstance(CONSUMER_KEY, CONSUMER_SECRET);

    static final String OAUTH_PREF = "LIKEDIN_OAUTH";
    static final String PREF_TOKEN = "token";
    static final String PREF_TOKENSECRET = "tokenSecret";
    static final String PREF_REQTOKENSECRET = "requestTokenSecret";

    TextView tv = null;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        tv = new TextView(this);
        setContentView(tv);
        final SharedPreferences pref = getSharedPreferences(OAUTH_PREF,
                MODE_PRIVATE);
        final String token = pref.getString(PREF_TOKEN, null);
        final String tokenSecret = pref.getString(PREF_TOKENSECRET, null);
        if (token == null || tokenSecret == null) {
            startAutheniticate();
        } else {
            showCurrentUser(new LinkedInAccessToken(token, tokenSecret));
        }

    }

    void startAutheniticate() {
        new AsyncTask<Void, Void, LinkedInRequestToken>() {

            @Override
            protected LinkedInRequestToken doInBackground(Void... params) {
                return oAuthService.getOAuthRequestToken(OAUTH_CALLBACK_URL);
            }

            @Override
            protected void onPostExecute(LinkedInRequestToken liToken) {
                final String uri = liToken.getAuthorizationUrl();
                getSharedPreferences(OAUTH_PREF, MODE_PRIVATE)
                        .edit()
                        .putString(PREF_REQTOKENSECRET,
                                liToken.getTokenSecret()).commit();
                Intent i = new Intent(Intent.ACTION_VIEW, Uri.parse(uri));
                startActivity(i);
            }
        }.execute();
    }

    void finishAuthenticate(final Uri uri) {
        if (uri != null && uri.getScheme().equals(OAUTH_CALLBACK_SCHEME)) {
            final String problem = uri.getQueryParameter(OAUTH_QUERY_PROBLEM);
            if (problem == null) {

                new AsyncTask<Void, Void, LinkedInAccessToken>() {

                    @Override
                    protected LinkedInAccessToken doInBackground(Void... params) {
                        final SharedPreferences pref = getSharedPreferences(
                                OAUTH_PREF, MODE_PRIVATE);
                        final LinkedInAccessToken accessToken = oAuthService
                                .getOAuthAccessToken(
                                        new LinkedInRequestToken(
                                                uri.getQueryParameter(OAUTH_QUERY_TOKEN),
                                                pref.getString(
                                                        PREF_REQTOKENSECRET,
                                                        null)),
                                        uri.getQueryParameter(OAUTH_QUERY_VERIFIER));
                        pref.edit()
                                .putString(PREF_TOKEN, accessToken.getToken())
                                .putString(PREF_TOKENSECRET,
                                        accessToken.getTokenSecret())
                                .remove(PREF_REQTOKENSECRET).commit();
                        return accessToken;
                    }

                    @Override
                    protected void onPostExecute(LinkedInAccessToken accessToken) {
                        showCurrentUser(accessToken);
                    }
                }.execute();

            } else {
                Toast.makeText(this,
                        "Appliaction down due OAuth problem: " + problem,
                        Toast.LENGTH_LONG).show();
                finish();
            }

        }
    }

    void clearTokens() {
        getSharedPreferences(OAUTH_PREF, MODE_PRIVATE).edit()
                .remove(PREF_TOKEN).remove(PREF_TOKENSECRET)
                .remove(PREF_REQTOKENSECRET).commit();
    }

    void showCurrentUser(final LinkedInAccessToken accessToken) {
        final LinkedInApiClient client = factory
                .createLinkedInApiClient(accessToken);

        new AsyncTask<Void, Void, Object>() {

            @Override
            protected Object doInBackground(Void... params) {
                try {

                    final Person p = client.getProfileForCurrentUser();
                    // /////////////////////////////////////////////////////////
                    // here you can do client API calls ...
                    // client.postComment(arg0, arg1);
                    // client.updateCurrentStatus(arg0);
                    // or any other API call
                    // (this sample only check for current user
                    // and pass it to onPostExecute)
                    // /////////////////////////////////////////////////////////
                    return p;
                } catch (LinkedInApiClientException ex) {
                    return ex;
                }
            }

            @Override
            protected void onPostExecute(Object result) {
                if (result instanceof Exception) {
                    //result is an Exception :) 
                    final Exception ex = (Exception) result;
                    clearTokens();
                    Toast.makeText(
                            LITestActivity.this,
                            "Appliaction down due LinkedInApiClientException: "
                                    + ex.getMessage()
                                    + " Authokens cleared - try run application again.",
                            Toast.LENGTH_LONG).show();
                    finish();
                } else if (result instanceof Person) {
                    final Person p = (Person) result;
                    tv.setText(p.getLastName() + ", " + p.getFirstName());
                }
            }
        }.execute();

    }

    @Override
    protected void onNewIntent(Intent intent) {
        finishAuthenticate(intent.getData());
    }
}