大家好我实现了请求用户使用他们的Facebook帐户登录的应用程序，但每次退出应用程序并想再次打开应用程序时，它会显示未直接登出的按钮，需要注销并再次登录才能转到下一个活动。你可以建议我修改下面的代码吗？
import java.security.MessageDigest;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Calendar;
import kavehkamkar.turnup.Test.R;
import org.json.JSONException;
import com.facebook.Request;
import com.facebook.Request.GraphUserCallback;
import com.facebook.Response;
import com.facebook.Session;
import com.facebook.Session.OpenRequest;
import com.facebook.SessionState;
import com.facebook.UiLifecycleHelper;
import com.facebook.model.GraphUser;
import com.facebook.widget.LoginButton;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.Signature;
import android.graphics.Color;
import android.graphics.Typeface;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.Bundle;
import android.util.Base64;
import android.util.Log;
import android.view.Gravity;
import android.view.View;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends Activity
{public static ProgressDialog pDialog;
private UiLifecycleHelper uihelper;
LoginButton btn;
String id,firstname,sex ,birthday;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if (isOnline()){
uihelper =new UiLifecycleHelper(this,callback);
uihelper.onCreate(savedInstanceState);
btn=(LoginButton)findViewById(R.id.fbbtn);
try {
PackageInfo info = getPackageManager().getPackageInfo(
"com.example.testing",
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 (Exception e)
{
e.printStackTrace();
}
}
else{
AlertDialog.Builder builder = new AlertDialog.Builder(this);
TextView title = new TextView(MainActivity.this);
title.setText("Connection Failed");
title.setGravity(Gravity.LEFT);
title.setTextSize(17);
title.setTypeface(Typeface.DEFAULT_BOLD);
title.setTextColor(Color.RED);
builder.setCustomTitle(title);
builder.setMessage("No Internet connection ! Please check that you have a data connection and then try again.")
.setCancelable(false)
.setPositiveButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
//do things
finish();
System.exit(0);}
});
AlertDialog alert = builder.create();
alert.show();
}
}
private boolean isOnline() {
// TODO Auto-generated method stub
boolean status=false;
try{
ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo netInfo = cm.getNetworkInfo(0);
if (netInfo != null && netInfo.getState()==NetworkInfo.State.CONNECTED) {
status= true;
}else {
netInfo = cm.getNetworkInfo(1);
if(netInfo!=null && netInfo.getState()==NetworkInfo.State.CONNECTED)
status= true;
}
}catch(Exception e){
e.printStackTrace();
return false;
}
return status;
}
void showMsg(String string)
{
Toast.makeText(getApplicationContext(), string, Toast.LENGTH_SHORT).show();
}
private Session.StatusCallback callback =new Session.StatusCallback()
{
@Override
public void call(Session session, SessionState state, Exception exception)
{
if (state.isOpened()){
Intent in = new Intent("com.example.Test.Profile");
Bundle bundle = new Bundle();
bundle.putString("Fb_id",id);
session.getAccessToken() ;
bundle.putString("Fb_name", firstname);
session.getAccessToken() ;
bundle.putString("Fb_age", birthday);
session.getAccessToken() ;
bundle.putString("Fb_sex", sex);
in.putExtras(bundle);
startActivity(in);
btn.post(new Runnable(){
@Override
public void run() {
btn.setVisibility(View.INVISIBLE);
}});
}
onSessionStateChange(session,state,exception);
}
};
void onSessionStateChange(final Session session, SessionState state, Exception exception)
{
if (state.isOpened())
{
Log.i("facebook", "Logged in...");
Request request=Request.newMeRequest(session, new Request.GraphUserCallback()
{
@Override
public void onCompleted(GraphUser user, Response response)
{
if(user!=null)
{
Intent in = new Intent("com.example.Test.Profile");
Bundle bundle =new Bundle();
bundle.putString("Fb_id", user.getId());
if (user.getBirthday() !=null){
String agee = "";
String[] age= user.getBirthday().split("/");
for(int k = 0; k < age.length; k++){
agee=age[2];
}
int year = Calendar.getInstance().get(Calendar.YEAR);
int personage;
personage = year -Integer.valueOf( agee);
bundle.putString("Fb_age", Integer.toString(personage));
birthday=Integer.toString(personage);
session.getAccessToken();}
bundle.putString("Fb_name", user.getFirstName());
if (user.getProperty("gender").toString() !=null){
bundle.putString("Fb_sex", user.getProperty("gender").toString());
session.getAccessToken();
sex=user.getProperty("gender").toString();
}
in.putExtras(bundle);
startActivity(in);
id=user.getId();
session.getAccessToken();
firstname=user.getFirstName();
}
else
{
showMsg("its null");
showMsg(response.getError().getErrorMessage());
}
}
});
Bundle parameters = new Bundle();
parameters.putString("fields", "id,email,birthday,name,first_name,gender");
request.setParameters(parameters);
request.executeAsync();
}
else if (state.isClosed())
{
Log.i("facebook", "Logged out...");
}
}
public static void logoutFromFB(GraphUserCallback graphUserCallback) {
Session session = Session.getActiveSession();
if (session != null) {
if (!session.isClosed()) {
session.closeAndClearTokenInformation();
// clear your preferences if saved
}
} else {
session = new Session((Context) graphUserCallback);
Session.setActiveSession(session);
session.closeAndClearTokenInformation();
// clear your preferences if saved
}}
@Override
protected void onResume() {
super.onResume();
if (isOnline()){ uihelper.onResume(); }
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
uihelper.onSaveInstanceState(outState);
}
@Override
protected void onPause() {
super.onPause();
if (isOnline()){ uihelper.onPause();}
}
@Override
protected void onDestroy() {
super.onDestroy();
if (isOnline()){ uihelper.onDestroy(); }
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
uihelper.onActivityResult(requestCode, resultCode, data);
}
public void onBackPressed() {
Intent intent = new Intent(Intent.ACTION_MAIN);
intent.addCategory(Intent.CATEGORY_HOME);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
}
}
答案 0 :(得分：0)
最新版本sdk 4您可以使用LoginManager.getInstance（）。logOut（）;从facebook登出。在您的任务完成或用户从该屏幕导航的情况下，您可以以编程方式注销。同时初始化你的sdk FacebookSdk.sdkInitialize（getApplicationContext（））;
如果您使用的是旧版本，则必须使用以下方法清除会话信息
Session session = Session.getActiveSession();
if (session != null) {
if (!session.isClosed()) {
session.closeAndClearTokenInformation();
//clear your preferences if saved
}
} else {
session = new Session(context);
Session.setActiveSession(session);
session.closeAndClearTokenInformation();
//clear your preferences if saved
}
答案 1 :(得分：0)
我使用访问令牌解决了这个问题，并将此访问令牌保存在共享首选项中。
package com.example.Test;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.net.MalformedURLException;
import java.util.Calendar;
import kavehkamkar.turnup.Test.R;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
import com.facebook.android.AsyncFacebookRunner;
import com.facebook.android.AsyncFacebookRunner.RequestListener;
import com.facebook.android.DialogError;
import com.facebook.android.Facebook;
import com.facebook.android.Facebook.DialogListener;
import com.facebook.android.FacebookError;
public class MainActivity extends Activity {
// Your Facebook APP ID
private static String APP_ID = "Replace with your App "; //
// Instance of Facebook Class
private Facebook facebook = new Facebook(APP_ID);
private AsyncFacebookRunner mAsyncRunner;
String FILENAME = "AndroidSSO_data";
public static SharedPreferences mPrefs;
// Buttons
Button btnFbLogin;
String access_token;
long expires;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btnFbLogin = (Button) findViewById(R.id.btn_fblogin);
mAsyncRunner = new AsyncFacebookRunner(facebook);
mPrefs = getPreferences(MODE_PRIVATE);
access_token = mPrefs.getString("access_token", null);
expires = mPrefs.getLong("access_expires", 0);
if (access_token != null) {
facebook.authorize(this,
new String[] { "email"},
new DialogListener() {
@Override
public void onCancel() {
// Function to handle cancel event
}
@Override
public void onComplete(Bundle values) {
btnFbLogin.setVisibility(View.INVISIBLE);
getProfileInformation();
// Making logout Button visible
// Making post to wall visible
}
@Override
public void onError(DialogError error) {
// Function to handle error
}
@Override
public void onFacebookError(FacebookError fberror) {
// Function to handle Facebook errors
}
});
}
if (expires != 0) {
facebook.setAccessExpires(expires);
}
/**
* Login button Click event
* */
btnFbLogin.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Log.d("Image Button", "button Clicked");
loginToFacebook();
}
});
/**
* Getting facebook Profile info
* */
/**
* Posting to Facebook Wall
* */
/**
* Showing Access Tokens
* */
}
/**
* Function to login into facebook
* */
public void loginToFacebook() {
mPrefs = getPreferences(MODE_PRIVATE);
access_token = mPrefs.getString("access_token", null);
expires = mPrefs.getLong("access_expires", 0);
if (access_token != null) {
facebook.setAccessToken(access_token);
btnFbLogin.setVisibility(View.INVISIBLE);
// Making get profile button visible
// Making post to wall visible
// Making show access tokens button visible
Log.d("FB Sessions", "" + facebook.isSessionValid());
}
if (expires != 0) {
facebook.setAccessExpires(expires);
}
if (!facebook.isSessionValid()) {
facebook.authorize(this,
new String[] { "email"},
new DialogListener() {
@Override
public void onCancel() {
// Function to handle cancel event
}
@Override
public void onComplete(Bundle values) {
// Function to handle complete event
// Edit Preferences and update facebook acess_token
SharedPreferences.Editor editor = mPrefs.edit();
editor.putString("access_token",
facebook.getAccessToken());
editor.putLong("access_expires",
facebook.getAccessExpires());
editor.commit();
// Making Login button invisible
btnFbLogin.setVisibility(View.INVISIBLE);
// Making logout Button visible
getProfileInformation();
// Making post to wall visible
// Making show access tokens button visible
}
@Override
public void onError(DialogError error) {
// Function to handle error
}
@Override
public void onFacebookError(FacebookError fberror) {
// Function to handle Facebook errors
}
});
}
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
facebook.authorizeCallback(requestCode, resultCode, data);
}
/**
* Get Profile information by making request to Facebook Graph API
* */
@SuppressWarnings("deprecation")
public void getProfileInformation() {
Bundle params = new Bundle();
params.putString("fields", "id,email,birthday,name,first_name,gender");
mAsyncRunner.request("me", params,new RequestListener() {
@Override
public void onComplete(String response, Object state) {
Log.d("Profile", response);
String json = response;
try {
// Facebook Profile JSON data
JSONObject profile = new JSONObject(json);
final String email = profile.getString("email");
Intent in = new Intent("com.example.Test.Profile");
Bundle bundle =new Bundle();
bundle.putString("Fb_id", profile.getString("id"));
if (profile.getString("birthday") !=null){
String agee = "";
String[] age= profile.getString("birthday").split("/");
for(int k = 0; k < age.length; k++){
agee=age[2];
}
int year = Calendar.getInstance().get(Calendar.YEAR);
int personage;
personage = year -Integer.valueOf( agee);
bundle.putString("Fb_age", Integer.toString(personage));
}
bundle.putString("Fb_name", profile.getString("name"));
if (profile.getString("gender").toString() !=null){
bundle.putString("Fb_sex", profile.getString("gender").toString());
}
// Toast.makeText(getApplicationContext(), "Name: " + name + "\nEmail: " + email, Toast.LENGTH_LONG).show();
in.putExtras(bundle);
startActivity(in);
} catch (JSONException e) {
e.printStackTrace();
}
}
@Override
public void onIOException(IOException e, Object state) {
}
@Override
public void onFileNotFoundException(FileNotFoundException e,
Object state) {
}
@Override
public void onMalformedURLException(MalformedURLException e,
Object state) {
}
@Override
public void onFacebookError(FacebookError e, Object state) {
}
});
}
/**
* Function to post to facebook wall
* */
@SuppressWarnings("deprecation")
public void postToWall() {
// post on user's wall.
facebook.dialog(this, "feed", new DialogListener() {
@Override
public void onFacebookError(FacebookError e) {
}
@Override
public void onError(DialogError e) {
}
@Override
public void onComplete(Bundle values) {
}
@Override
public void onCancel() {
}
});
}
/**
* Function to show Access Tokens
* */
public void showAccessTokens() {
String access_token = facebook.getAccessToken();
Toast.makeText(getApplicationContext(),
"Access Token: " + access_token, Toast.LENGTH_LONG).show();
}
/**
* Function to Logout user from Facebook
* */
public void logoutFromFacebook() {
mAsyncRunner.logout(this, new RequestListener() {
@Override
public void onComplete(String response, Object state) {
Log.d("Logout from Facebook", response);
if (Boolean.parseBoolean(response) == true) {
runOnUiThread(new Runnable() {
@Override
public void run() {
// make Login button visible
btnFbLogin.setVisibility(View.VISIBLE);
// making all remaining buttons invisible
}
});
}
}
@Override
public void onIOException(IOException e, Object state) {
}
@Override
public void onFileNotFoundException(FileNotFoundException e,
Object state) {
}
@Override
public void onMalformedURLException(MalformedURLException e,
Object state) {
}
@Override
public void onFacebookError(FacebookError e, Object state) {
}
});
}
public void onBackPressed() {
Intent intent = new Intent(Intent.ACTION_MAIN);
intent.addCategory(Intent.CATEGORY_HOME);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
}
}