我正在登录页面，我需要登录facebook，我也成功了，在第一次安装后它要求用户密码继续使用facebook，甚至成功尝试它将进入下一个活动。但是我之后关闭应用程序它再次进入登录活动，Facebook按钮转为注销。 我没有得到正确的做法，为什么它在第二次打开应用程序后没有显示我的下一页。 这是我的登录活动：
public class Login extends AppCompatActivity {
private String eml;
private String pswrd;
private ProfileTracker mProfileTracker;
private ProgressDialog pDialog;
String status = "";
// private Button fbbutton;
Profile profile;
Button login;
private CallbackManager callbackManager;
private AccessTokenTracker accessTokenTracker;
private ProfileTracker profileTracker;
SharedPreferences prefs;
// private int serverResponseCode = 0;
TextView tac1;
EditText email, pass;
private static String url_create_book = "http://cloud....com/broccoli/login.php";
public static CallbackManager callbackmanager;
private FacebookCallback<LoginResult> callback = new FacebookCallback<LoginResult>() {
@Override
public void onSuccess(LoginResult loginResult) {
// Profile profile = Profile.getCurrentProfile();
// nextActivity(profile);
}
@Override
public void onCancel() { }
@Override
public void onError(FacebookException e) { }
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
FacebookSdk.sdkInitialize(getApplicationContext());
//AppEventsLogger.activateApp(this);
setContentView(R.layout.activity_login);
Get_hash_key();
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
callbackManager = CallbackManager.Factory.create();
accessTokenTracker = new AccessTokenTracker() {
@Override
protected void onCurrentAccessTokenChanged(AccessToken oldToken, AccessToken newToken) {
}
};
profileTracker = new ProfileTracker() {
@Override
protected void onCurrentProfileChanged(Profile oldProfile, Profile newProfile) {
// nextActivity(newProfile);
}
};
accessTokenTracker.startTracking();
profileTracker.startTracking();
/* SharedPreferences sf_shared_pref = getSharedPreferences("variable", 0);
String on_time_login = sf_shared_pref.getString("boolean flag", "");
if (on_time_login!=null && on_time_login.isEmpty()) {
Intent intent = new Intent(getApplicationContext(), Home.class);
startActivity(intent);
}*/
Button guest=(Button)findViewById(R.id.gbtn) ;
guest.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent gst=new Intent(Login.this,Home.class);
startActivity(gst);
}
});
// AppEventsLogger.activateApp(this);
// fbbutton = (Button) findViewById(R.id.fbtn);
/*fbbutton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// Call private method
onFblogin();
}
});*/
LoginButton loginButton = (LoginButton)findViewById(R.id.login_button);
callback = new FacebookCallback<LoginResult>() {
@Override
public void onSuccess(LoginResult loginResult) {
AccessToken accessToken = loginResult.getAccessToken();
Profile profile = Profile.getCurrentProfile();
//nextActivity(profile);
Toast.makeText(getApplicationContext(), "Logging in...", Toast.LENGTH_SHORT).show();
Intent main = new Intent(Login.this, Home.class);
// main.putExtra("name", profile.getFirstName());
// main.putExtra("surname", profile.getLastName());
// main.putExtra("imageUrl", profile.getProfilePictureUri(200,200).toString());
main.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(main);
}
@Override
public void onCancel() {
}
@Override
public void onError(FacebookException e) {
}
};
loginButton.setReadPermissions("user_friends");
loginButton.registerCallback(callbackManager, callback);
email = (EditText)findViewById(R.id.email);
pass = (EditText) findViewById(R.id.password);
tac1 = (TextView)findViewById(R.id.cAcc);
tac1.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View v) {
startActivity(new Intent(Login.this, RegistrationForm.class));
}
}
);
login = (Button) findViewById(R.id.lbtn);
login.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
pDialog = new ProgressDialog(Login.this);
pDialog.setMessage("Please wait..");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
eml = email.getText().toString();
pswrd = pass.getText().toString();
// new CreateNewProduct().execute();
StringRequest stringRequest = new StringRequest(Request.Method.POST, url_create_book,
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
pDialog.dismiss();
if (eml.trim().length() > 0 && pswrd.trim().length() > 0)
{
if (response.trim().equals("success"))
{
Toast.makeText(Login.this, "Login Success", Toast.LENGTH_SHORT).show();
// SharedPreferences settings = getApplicationContext().getSharedPreferences("variable", MODE_PRIVATE); // 0 - for private mode
// SharedPreferences.Editor editor = settings.edit();
// editor.putString("flag", eml);
// editor.apply();
startActivity(new Intent(Login.this, Home.class));
//your intent code here
} else {
Toast.makeText(Login.this, "username/password incorrect", Toast.LENGTH_SHORT).show();
}
}
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
pDialog.dismiss();
Toast.makeText(Login.this, error.toString(), Toast.LENGTH_LONG).show();
}
}) {
@Override
protected Map<String, String> getParams() {
Map<String, String> params = new HashMap<String, String>();
params.put("email", eml);
params.put("password", pswrd);
return params;
}
};
RequestQueue requestQueue = Volley.newRequestQueue(Login.this);
requestQueue.add(stringRequest);
}
});
}
public void Get_hash_key() {
PackageInfo info;
try {
info = getPackageManager().getPackageInfo("com.example.zeba.broccoli", PackageManager.GET_SIGNATURES);
for (Signature signature : info.signatures) {
MessageDigest md;
md = MessageDigest.getInstance("SHA");
md.update(signature.toByteArray());
String something = new String(Base64.encode(md.digest(), 0));
//String something = new String(Base64.encodeBytes(md.digest()));
Log.e("hash key", something);
}
} catch (PackageManager.NameNotFoundException e1) {
Log.e("name not found", e1.toString());
} catch (NoSuchAlgorithmException e) {
Log.e("no such an algorithm", e.toString());
} catch (Exception e) {
Log.e("exception", e.toString());
}
}
/**private void onFblogin() {
callbackmanager = CallbackManager.Factory.create();
// Set permissions
LoginManager.getInstance().logInWithReadPermissions(this, Arrays.asList("email", "user_photos", "public_profile"));
LoginManager.getInstance().registerCallback(callbackmanager,
new FacebookCallback<LoginResult>() {
@Override
public void onSuccess(LoginResult loginResult) {
try {
if (Profile.getCurrentProfile() == null) {
mProfileTracker = new ProfileTracker() {
@Override
protected void onCurrentProfileChanged(Profile profile_old, Profile profile_new) {
// profile2 is the new profile
profile = profile_new;
mProfileTracker.stopTracking();
}
};
mProfileTracker.startTracking();
} else {
profile = Profile.getCurrentProfile();
}
GraphRequest request = GraphRequest.newMeRequest(
loginResult.getAccessToken(),
new GraphRequest.GraphJSONObjectCallback() {
@Override
public void onCompleted(JSONObject object, GraphResponse response) {
Log.v("FACEBOOK LOGIN", response.toString());
// Application code
try {
String fb_id = object.getString("id");
String fb_name = object.getString("name");
String profilePicUrl = "https://graph.facebook.com/" + fb_id + "/picture?width=200&height=200";
String fb_gender = object.getString("gender");
String fb_email = object.getString("email");
String fb_birthday = object.getString("birthday");
Toast.makeText(getApplicationContext(), "Name: " + fb_name + " Email: " +fb_email, Toast.LENGTH_SHORT).show();
Intent _int = new Intent(Login.this,Home.class);
startActivity(_int);
}
catch (JSONException e) {
e.printStackTrace();
}
//use shared preferences here
}
});
Bundle parameters = new Bundle();
parameters.putString("fields", "id,name,email,gender,birthday,picture.type(small)");
request.setParameters(parameters);
request.executeAsync();
//go to Home page
} catch (Exception e) {
Log.d("ERROR", e.toString());
}
}*/
protected void onResume() {
super.onResume();
//Facebook login
Profile profile = Profile.getCurrentProfile();
//nextActivity(profile);
}
@Override
protected void onPause() {
super.onPause();
}
protected void onStop() {
super.onStop();
//Facebook login
accessTokenTracker.stopTracking();
profileTracker.stopTracking();
}
@Override
protected void onActivityResult(int requestCode, int responseCode, Intent intent) {
super.onActivityResult(requestCode, responseCode, intent);
//Facebook login
callbackManager.onActivityResult(requestCode, responseCode, intent);
}
/* private void nextActivity(Profile profile){
if(profile != null){
Intent main = new Intent(Login.this, Home.class);
// main.putExtra("name", profile.getFirstName());
// main.putExtra("surname", profile.getLastName());
// main.putExtra("imageUrl", profile.getProfilePictureUri(200,200).toString());
main.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(main);
}
}*/
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
onBackPressed();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
}
答案 0 :(得分：0)
@Override
public void onSuccess(LoginResult loginResult) {
AccessToken accessToken = loginResult.getAccessToken();
Log.d(FACEBOOK_TAG, "Access token = " + accessToken.getToken());
ProfileTracker profileTracker = new ProfileTracker() {
@Override
protected void onCurrentProfileChanged(Profile oldProfile, Profile currentProfile) {
this.stopTracking();
Profile.setCurrentProfile(currentProfile);
Profile profile = currentProfile == null ? oldProfile : currentProfile;
//doRequiredUsingFacebookUserInfo(profile);
}
};
profileTracker.startTracking();
}
使用上面的代码在FB登录成功后获取访问令牌。检查访问令牌是否为空（获取成功回调）。一旦配置文件不为空，您可以添加活动导航意图。