アンドロイドスタジオ

Question

私は、このstackoverflowのから学ぶことでFacebookのからユーザー名を取得しようとしているためのFacebookのユーザー名を取得するためにどのように私は新しい開発者を午前link

、私は本当に解決策を見つけることができませんでしたコードIをご確認ください。取り組んで、私の新しい初心者

は、私はすでにeverthingを試してみましたリンク与えないでください助けてください、私は

public class MainActivity extends AppCompatActivity { 

private TextView mTextDetails; 
private CallbackManager mCallbackManager; 

@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    FacebookSdk.sdkInitialize(this.getApplicationContext()); 
    mCallbackManager=CallbackManager.Factory.create(); 
    setContentView(R.layout.activity_main); 

    //instantiate callbacks manager 
    mCallbackManager = CallbackManager.Factory.create(); 

} 

private FacebookCallback <LoginResult> mcallback = new FacebookCallback<LoginResult>() { 

    @Override 
    public void onSuccess(LoginResult loginResult) { 

     AccessToken accessToken = loginResult.getAccessToken(); 
     Profile profile = Profile.getCurrentProfile(); 
     if (profile != null){ 
      mTextDetails = (TextView)findViewById(R.id.text_details); 
      mTextDetails.setText("Welcome "+ profile.getName()); 
     } 
    } 

    @Override 
    public void onCancel() { 

    } 

    @Override 
    public void onError(FacebookException error) { 

    } 
}; 

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

ベルを支援するためのコードを編集することができ要求してきましたOWは

<TextView 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:text="@string/Welcome" 
    android:id="@+id/text_details" 
    android:layout_centerHorizontal="true" 
    android:layout_centerVertical="true" 
    android:layout_above="@+id/login_button"/> 

<com.facebook.login.widget.LoginButton 
    android:id="@+id/login_button" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_gravity="center_horizontal" 
    android:layout_marginTop="30dp" 
    android:layout_marginBottom="30dp" 
    android:layout_centerInParent="true"/> 

は、私は、ユーザー名がアンドロイドの代わりにしてのTextViewに表示するファイル私XMLです：ID = "@ + ID/text_details"

Answer 1

することができますUserinfoChangedCallback

https://developers.facebook.com/docs/reference/android/3.23.1/interface/LoginButton.UserInfoChangedCallback/

loginBtn = (LoginButton) findViewById(R.id.fb_login_button); 
      loginBtn.setUserInfoChangedCallback(new UserInfoChangedCallback() { 
       @Override 
       public void onUserInfoFetched(GraphUser user) { 
        if (user != null) { 
         userName.setText("Hello, " + user.getName()); 
        } else { 
         userName.setText("You are not logged"); 
        } 
       } 
      }); 

- と呼ばれるこの特定の方法をご確認ください

userNameは私のアプリケーションにあるTextViewです。ログインに成功すると、ユーザー名が表示されます。

完全なコードがあり、

import java.security.MessageDigest; 
import java.security.NoSuchAlgorithmException; 
import java.util.Arrays; 
import java.util.List; 

import android.app.Activity; 
import android.content.Intent; 
import android.content.pm.PackageInfo; 
import android.content.pm.PackageManager; 
import android.content.pm.PackageManager.NameNotFoundException; 
import android.content.pm.Signature; 
import android.os.Bundle; 

import android.util.Base64; 
import android.util.Log; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.widget.Button; 
import android.widget.TextView; 
import android.widget.Toast; 


import com.facebook.Request; 
import com.facebook.Response; 
import com.facebook.Session; 
import com.facebook.SessionState; 
import com.facebook.UiLifecycleHelper; 
import com.facebook.model.GraphUser; 
import com.facebook.widget.LoginButton; 
import com.facebook.widget.LoginButton.UserInfoChangedCallback; 
import com.natarajan.drapjabdulkalam.R; 

public class ShareHelper extends Activity{ 

     private LoginButton loginBtn; 
     //private Button postImageBtn; 
     private Button updateStatusBtn; 

     private TextView fbquote; 

     private TextView userName; 

     private UiLifecycleHelper uiHelper; 

     private static final List<String> PERMISSIONS = Arrays.asList("publish_actions"); 

     private String message; 


     //private static String message = "Sample status posted from android app"; 

     public void onCreate(Bundle savedInstanceState) { 
      super.onCreate(savedInstanceState); 

     // Add code to print out the key hash 
      try { 
       PackageInfo info = getPackageManager().getPackageInfo(
         "com.facebook.samples.hellofacebook", 
         PackageManager.GET_SIGNATURES); 
       for (Signature signature : info.signatures) { 
        MessageDigest md = MessageDigest.getInstance("SHA"); 
        md.update(signature.toByteArray()); 
        Log.d("KeyHash:", Base64.encodeToString(md.digest(), Base64.DEFAULT)); 
        } 
      } catch (NameNotFoundException e) { 

      } catch (NoSuchAlgorithmException e) { 

      } 


      Intent intent = getIntent(); 

      message = intent.getStringExtra("quote");  


      uiHelper = new UiLifecycleHelper(this, statusCallback); 
      uiHelper.onCreate(savedInstanceState); 

      setContentView(R.layout.sharehelper_activity); 

      fbquote = (TextView)findViewById(R.id.FbTextView); 
      fbquote.setText(message); 

      userName = (TextView) findViewById(R.id.user_name); 
      loginBtn = (LoginButton) findViewById(R.id.fb_login_button); 
      loginBtn.setUserInfoChangedCallback(new UserInfoChangedCallback() { 
       @Override 
       public void onUserInfoFetched(GraphUser user) { 
        if (user != null) { 
         userName.setText("Hello, " + user.getName()); 
        } else { 
         userName.setText("You are not logged"); 
        } 
       } 
      }); 

      /* postImageBtn = (Button) findViewById(R.id.post_image); 
      postImageBtn.setOnClickListener(new OnClickListener() { 

       @Override 
       public void onClick(View view) { 
        postImage(); 
       } 
      });*/ 

      updateStatusBtn = (Button) findViewById(R.id.update_status); 
      updateStatusBtn.setOnClickListener(new OnClickListener() { 

       @Override 
       public void onClick(View v) { 
        postStatusMessage(); 
       } 
      }); 

      buttonsEnabled(false); 
     } 

     private Session.StatusCallback statusCallback = new Session.StatusCallback() { 
      @Override 
      public void call(Session session, SessionState state, 
        Exception exception) { 
       if (state.isOpened()) { 
        buttonsEnabled(true); 
        Log.d("FacebookSampleActivity", "Facebook session opened"); 
       } else if (state.isClosed()) { 
        buttonsEnabled(false); 
        Log.d("FacebookSampleActivity", "Facebook session closed"); 
       } 
      } 
     }; 

     public void buttonsEnabled(boolean isEnabled) { 
      // postImageBtn.setEnabled(isEnabled); 
      updateStatusBtn.setEnabled(isEnabled); 
     } 

     /* public void postImage() { 
      if (checkPermissions()) { 
       Bitmap img = BitmapFactory.decodeResource(getResources(), 
         R.drawable.ic_launcher); 
       Request uploadRequest = Request.newUploadPhotoRequest(
         Session.getActiveSession(), img, new Request.Callback() { 
          @Override 
          public void onCompleted(Response response) { 
           Toast.makeText(ShareHelper.this, 
             "Photo uploaded successfully", 
             Toast.LENGTH_LONG).show(); 
          } 
         }); 
       uploadRequest.executeAsync(); 
      } else { 
       requestPermissions(); 
      } 
     } */ 

     public void postStatusMessage() { 
      if (checkPermissions()) { 
       Request request = Request.newStatusUpdateRequest(
         Session.getActiveSession(), message, 
         new Request.Callback() { 
          @Override 
          public void onCompleted(Response response) { 
           if (response.getError() == null) 
            Toast.makeText(ShareHelper.this, 
              "Quote Shared successfully", 
              Toast.LENGTH_LONG).show(); 
          } 
         }); 
       request.executeAsync(); 
      } else { 
       requestPermissions(); 
      } 
     } 

     public boolean checkPermissions() { 
      Session s = Session.getActiveSession(); 
      if (s != null) { 
       return s.getPermissions().contains("publish_actions"); 
      } else 
       return false; 
     } 

     public void requestPermissions() { 
      Session s = Session.getActiveSession(); 
      if (s != null) 
       s.requestNewPublishPermissions(new Session.NewPermissionsRequest(
         this, PERMISSIONS)); 
     } 

     @Override 
     public void onResume() { 
      super.onResume(); 
      uiHelper.onResume(); 
      buttonsEnabled(Session.getActiveSession().isOpened()); 
     } 

     @Override 
     public void onPause() { 
      super.onPause(); 
      uiHelper.onPause(); 
     } 

     @Override 
     public void onDestroy() { 
      super.onDestroy(); 
      uiHelper.onDestroy(); 
     } 

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

     @Override 
     public void onSaveInstanceState(Bundle savedState) { 
      super.onSaveInstanceState(savedState); 
      uiHelper.onSaveInstanceState(savedState); 
     } 
} 

とXMLがあり、

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:facebook="http://schemas.android.com/apk/res-auto" 
    android:id="@+id/activity_facebook" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:gravity="center_horizontal" 
    android:background="@drawable/bg1" 
    android:orientation="vertical" 
    android:padding="20dp" > 

    <com.facebook.widget.LoginButton 
     android:id="@+id/fb_login_button" 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" 
     android:layout_marginTop="5dp" 
     facebook:confirm_logout="false" 
     android:background="@color/com_facebook_blue" 
     android:textStyle="bold" 
     facebook:fetch_user_info="true" /> 

    <TextView 
     android:id="@+id/user_name" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_gravity="center" 
     android:layout_margin="10dp" 
     android:textStyle="bold" 
     android:textSize="18sp" /> 

    <Button 
     android:id="@+id/update_status" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 

     android:textStyle="bold" 
     android:textColor="@color/com_facebook_loginview_text_color" 
     android:background="@color/com_facebook_blue" 
     android:text="@string/update_status" /> 

    <TextView 
     android:id="@+id/FbTextView" 
     android:layout_width="match_parent" 
     android:layout_height="0dp" 
     android:layout_marginTop="10dp" 
     android:layout_weight="1" 
     android:background="#FFFFFF" 
     android:text="@string/welcometext" 
     android:textSize="20sp" 
     android:gravity="left|center" 
     android:textColor="#0B0A0A" 
     android:padding="10dp" 
     android:textStyle="bold" 
     /> 


<!-- <Button 
     android:id="@+id/post_image" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:text="@string/post_image" /> --> 

</LinearLayout>