Android Tutorial => Creating login with twitter button and attach a...

Example

Inside your layout, add a Login button with the following code:

 <com.twitter.sdk.android.core.identity.TwitterLoginButton
     android:id="@+id/twitter_login_button"
     android:layout_width="wrap_content"
     android:layout_height="wrap_content"
     android:layout_centerInParent="true"/>

In the Activity or Fragment that displays the button, you need to create and attach a Callback to the Login Buttonas the following:

 import com.twitter.sdk.android.core.Callback;
 import com.twitter.sdk.android.core.Result;
 import com.twitter.sdk.android.core.TwitterException;
 import com.twitter.sdk.android.core.TwitterSession;
 import com.twitter.sdk.android.core.identity.TwitterLoginButton;
 ...

 loginButton = (TwitterLoginButton) findViewById(R.id.login_button);
 loginButton.setCallback(new Callback<TwitterSession>() {
     @Override
     public void success(Result<TwitterSession> result) {
         Log.d(TAG, "userName: " + session.getUserName());
         Log.d(TAG, "userId: " + session.getUserId());
         Log.d(TAG, "authToken: " + session.getAuthToken());
         Log.d(TAG, "id: " + session.getId());
         Log.d(TAG, "authToken: " + session.getAuthToken().token);
         Log.d(TAG, "authSecret: " + session.getAuthToken().secret);
     }

     @Override
     public void failure(TwitterException exception) {
         // Do something on failure
     }
 });

Pass the result of the authentication Activity back to the button:

 @Override
 protected void onActivityResult(int requestCode, int resultCode, Intent data) {
     super.onActivityResult(requestCode, resultCode, data);
     // Make sure that the loginButton hears the result from any
     // Activity that it triggered.
     loginButton.onActivityResult(requestCode, resultCode, data);
 }

Note, If using the TwitterLoginButton in a Fragment, use the following steps instead:

 @Override
 protected void onActivityResult(int requestCode, int resultCode, Intent data) {
     super.onActivityResult(requestCode, resultCode, data);

     // Pass the activity result to the fragment, which will then pass the result to the login
     // button.
     Fragment fragment = getFragmentManager().findFragmentById(R.id.your_fragment_id);
     if (fragment != null) {
         fragment.onActivityResult(requestCode, resultCode, data);
     }
 }

Add the following lines to your build.gradle dependencies:

 apply plugin: 'io.fabric'

 repositories {
     maven { url 'https://maven.fabric.io/public' }
 }

 compile('com.twitter.sdk.android:twitter:1.14.1@aar') {
     transitive = true;
 }

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Android Twitter APIs Creating login with twitter button and attach a callback to it

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