java - Facebook 登录后将 Activity 重定向到 Frontpage Activity

Question

我试图在 Facebook 登录后完成到 Frontpage Activity 的重定向，我已经尝试过这个给定的代码，但没有锻炼是的，也尝试过这个link但没有解决
登录 Activity 的代码。

public  class login extends FragmentActivity {


private boolean isMainLobbyStarted = false;

CallbackManager callbackManager;
private LoginButton loginButton;
private loginResult loginResult;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    FacebookSdk.sdkInitialize(this.getApplicationContext());
    setContentView(R.layout.activity_login);


    public void onSuccess(LoginResult loginResult) {
        System.out.println("onSuccess");
        Intent mainLobby = new Intent(login.this, Frontpage.class);
        if(!isMainLobbyStarted) {
            startActivity(mainLobby);
            isMainLobbeyStarted = true;
    }

}




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

消息gradle构建

Error:(54, 2) error: reached end of file while parsing
Error:(35, 9) error: illegal start of expression
Error:(35, 16) error: illegal start of expression
Error:(35, 30) error: ';' expected
Error:(35, 54) error: ';' expected
Error:(49, 36) error: ';' expected
Error:(49, 53) error: <identifier> expected
Error:(49, 58) error: not a statement
Error:(49, 68) error: ';' expected
Error:(49, 81) error: ';' expected
Error:Execution failed for task ':app:compileDebugJavaWithJavac'.
Compilation failed; see the compiler error output for details.

Answer 1

我已经发布了带有完整编码的答案，如果您发现自己有错误，请随时询问我

import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import com.facebook.CallbackManager;
import com.facebook.FacebookCallback;
import com.facebook.FacebookException;
import com.facebook.FacebookSdk;
import com.facebook.login.LoginManager;
import com.facebook.login.LoginResult;

public  class login extends FragmentActivity {

CallbackManager callbackManager;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    FacebookSdk.sdkInitialize(this.getApplicationContext());
    setContentView(R.layout.activity_login);

    callbackManager = CallbackManager.Factory.create();

    LoginManager.getInstance().registerCallback(callbackManager,
            new FacebookCallback<LoginResult>() {
                @Override
                public void onSuccess(LoginResult loginResult) {
                    Intent intent = new Intent(login.this, Frontpage.class);
                    startActivity(intent);
                    // App code
                }

                @Override
                public void onCancel() {
                    // App code
                }

                @Override
                public void onError(FacebookException exception) {
                    // App code
                }
            });
}


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

}