14
का उपयोग कर एप्लिकेशन बंद कर देता है, मैं एक एंड्रॉइड ऐप विकसित कर रहा हूं जो फेसबुक के साथ एकीकृत होना चाहिए। मैं आधिकारिक गाइड और कई अन्य गाइड के माध्यम से चला गया हूं और मुझे लगता है कि मैंने फेसबुक लॉगिन फ्रैमेजेंट के साथ सब कुछ सही ढंग से लागू किया है।फेसबुक लॉगिन खंड फेसबुक एसडीके 3.0.1
हालांकि एसडीके केवल पहली बार सफल लॉगिन करता है। अगर मैं लॉग आउट करता हूं और फिर से प्रयास करता हूं तो एप्लिकेशन बिना किसी अपवाद के बंद हो जाता है। ऐसा ही होता है यदि मैं अपना ऐप मारता हूं और इसे एप्लिकेशन सूची से शुरू करता हूं।
मैं इसे एमुलेटर और वास्तविक डिवाइस (नेक्सस 7) दोनों में पुन: उत्पन्न कर सकता हूं।
LoginActivity.java:
package com.everporter.everporter;
import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import org.json.JSONException;
import org.json.JSONObject;
import com.everporter.everporter.FBLoginFragment.OnFBAccessTokenPass;
import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.annotation.TargetApi;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.AsyncTask;
import android.os.Build;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.telephony.PhoneNumberUtils;
import android.text.TextUtils;
import android.util.Log;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.View;
import android.view.inputmethod.EditorInfo;
import android.widget.EditText;
import android.widget.TextView;
/**
* Activity which displays a login screen to the user, offering registration as
* well.
*/
public class LoginActivity extends FragmentActivity
implements OnFBAccessTokenPass {
/**
* The default email to populate the email field with.
*/
public static final String EXTRA_EMAIL = "com.example.android.authenticatordemo.extra.EMAIL";
private static final String REST_METHOD_NAME = "/login/";
private static final String SOCIAL_REST_METHOD_NAME = "/validation/";
private static final String TAG = "UserLoginTask";
private static final String FB_TAG = "UserFacebookLoginTask";
/**
* Keep track of the login task to ensure we can cancel it if requested.
*/
private UserLoginTask mAuthTask = null;
private UserFacebookLoginTask mFacebookAuthTask = null;
private String mFacebookAccessToken;
private String mFacebookUserId;
// API URL read from the settings (set in main activity)
private String mRestApiUrl;
private int mConnectionTimeout;
private int mReadTimeout;
private SharedPreferences mPrefs;
// Error message set by the async task, if the error does happen indeed
private String mAsyncTaskErrorMsg;
// Values for email and password at the time of the login attempt.
private String mEmail;
private String mPassword;
private String mSessionCookie; // our session
// UI references.
private EditText mEmailView;
private EditText mPasswordView;
private View mLoginFormView;
private View mLoginStatusView;
private TextView mLoginStatusMessageView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
mPrefs = getSharedPreferences("settings", MODE_PRIVATE);
mRestApiUrl = mPrefs.getString("api_url", "");
mConnectionTimeout = mPrefs.getInt("connection_timeout", 3000);
mReadTimeout = mPrefs.getInt("read_timeout", 3000);
// Set up the login form.
mEmail = getIntent().getStringExtra(EXTRA_EMAIL);
mEmailView = (EditText) findViewById(R.id.email);
mEmailView.setText(mEmail);
mPasswordView = (EditText) findViewById(R.id.password);
mPasswordView
.setOnEditorActionListener(new TextView.OnEditorActionListener() {
@Override
public boolean onEditorAction(TextView textView, int id,
KeyEvent keyEvent) {
if (id == R.id.login || id == EditorInfo.IME_NULL) {
attemptLogin();
return true;
}
return false;
}
});
mLoginFormView = findViewById(R.id.login_form);
mLoginStatusView = findViewById(R.id.login_status);
mLoginStatusMessageView = (TextView) findViewById(R.id.login_status_message);
findViewById(R.id.sign_in_button).setOnClickListener(
new View.OnClickListener() {
@Override
public void onClick(View view) {
attemptLogin();
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
super.onCreateOptionsMenu(menu);
getMenuInflater().inflate(R.menu.login, menu);
return true;
}
/**
* Handle Facebook login
*/
@Override
public void onFBAccessTokenPass(String accessToken, String uid) {
// we are passed Facebook access token, successful login
Log.i(TAG, "Facebook access token: " + accessToken);
mFacebookAccessToken = accessToken;
mFacebookUserId = uid;
// Show a progress spinner, and kick off a background task to
// sent the FB token to the server.
mLoginStatusMessageView.setText(R.string.login_progress_signing_in);
showProgress(true);
mFacebookAuthTask = new UserFacebookLoginTask(this);
mFacebookAuthTask.execute((Void) null);
}
/**
* Attempts to sign in or register the account specified by the login form.
* If there are form errors (invalid email, missing fields, etc.), the
* errors are presented and no actual login attempt is made.
*/
public void attemptLogin() {
if (mAuthTask != null) {
return;
}
// Reset errors.
mEmailView.setError(null);
mPasswordView.setError(null);
mAsyncTaskErrorMsg = "";
// Store values at the time of the login attempt.
mEmail = mEmailView.getText().toString();
mPassword = mPasswordView.getText().toString();
boolean cancel = false;
View focusView = null;
// Check for a valid password.
if (TextUtils.isEmpty(mPassword)) {
mPasswordView.setError(getString(R.string.error_field_required));
focusView = mPasswordView;
cancel = true;
} else if (mPassword.length() < 4) {
mPasswordView.setError(getString(R.string.error_invalid_password));
focusView = mPasswordView;
cancel = true;
}
// Check for a valid email address or phone number.
if (TextUtils.isEmpty(mEmail)) {
mEmailView.setError(getString(R.string.error_field_required));
focusView = mEmailView;
cancel = true;
} else if (!android.util.Patterns.EMAIL_ADDRESS.matcher(mEmail).matches() &&
!PhoneNumberUtils.isGlobalPhoneNumber(mEmail)) {
mEmailView.setError(getString(R.string.error_invalid_email));
focusView = mEmailView;
cancel = true;
}
if (cancel) {
// There was an error; don't attempt login and focus the first
// form field with an error.
focusView.requestFocus();
} else {
// Show a progress spinner, and kick off a background task to
// perform the user login attempt.
mLoginStatusMessageView.setText(R.string.login_progress_signing_in);
showProgress(true);
mAuthTask = new UserLoginTask(this);
mAuthTask.execute((Void) null);
}
}
/**
* Shows the progress UI and hides the login form.
*/
@TargetApi(Build.VERSION_CODES.HONEYCOMB_MR2)
private void showProgress(final boolean show) {
// On Honeycomb MR2 we have the ViewPropertyAnimator APIs, which allow
// for very easy animations. If available, use these APIs to fade-in
// the progress spinner.
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB_MR2) {
int shortAnimTime = getResources().getInteger(
android.R.integer.config_shortAnimTime);
mLoginStatusView.setVisibility(View.VISIBLE);
mLoginStatusView.animate().setDuration(shortAnimTime)
.alpha(show ? 1 : 0)
.setListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
mLoginStatusView.setVisibility(show ? View.VISIBLE
: View.GONE);
}
});
mLoginFormView.setVisibility(View.VISIBLE);
mLoginFormView.animate().setDuration(shortAnimTime)
.alpha(show ? 0 : 1)
.setListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
mLoginFormView.setVisibility(show ? View.GONE
: View.VISIBLE);
}
});
} else {
// The ViewPropertyAnimator APIs are not available, so simply show
// and hide the relevant UI components.
mLoginStatusView.setVisibility(show ? View.VISIBLE : View.GONE);
mLoginFormView.setVisibility(show ? View.GONE : View.VISIBLE);
}
}
/**
* Represents an asynchronous login/registration task used to authenticate
* the user.
*/
public class UserLoginTask extends AsyncTask<Void, Void, Boolean> {
private Context mContext;
public UserLoginTask(Context context) {
this.mContext = context;
}
@Override
protected Boolean doInBackground(Void... params) {
Log.i(TAG, "Begin auth...");
HttpURLConnection conn = null;
StringBuilder sb = new StringBuilder();
BufferedOutputStream printout;
boolean signedInOk = false;
try {
URL url = new URL(mRestApiUrl + REST_METHOD_NAME);
conn = (HttpURLConnection) url.openConnection();
conn.setDoInput(true);
conn.setDoOutput(true);
conn.setUseCaches(false);
conn.setConnectTimeout(mConnectionTimeout);
conn.setReadTimeout(mReadTimeout);
conn.setRequestMethod("POST");
conn.setRequestProperty("Content-Type","application/json; charset=utf-8");
conn.connect();
//Create JSONObject here
JSONObject jsonParam = new JSONObject();
jsonParam.put("password", mPassword);
jsonParam.put("username", mEmail);
// Send POST output.
printout = new BufferedOutputStream(conn.getOutputStream());
printout.write(jsonParam.toString().getBytes("UTF-8"));
printout.flush();
printout.close();
int httpCode = conn.getResponseCode();
if (httpCode == HttpURLConnection.HTTP_OK) {
BufferedReader br = new BufferedReader(new InputStreamReader(conn.getInputStream(), "UTF-8"));
String line = null;
while ((line = br.readLine()) != null) {
sb.append(line + "\n");
}
br.close();
Log.i(TAG, sb.toString());
JSONObject jsonResponse = new JSONObject(sb.toString());
int resultCode = jsonResponse.getInt("code");
if (resultCode == 0) {
// get the session id
String cookie = conn.getHeaderField("Set-Cookie");
if (cookie != null) {
Log.i(TAG, cookie);
signedInOk = true;
mSessionCookie = cookie;
Log.i(TAG, "Authenticated");
}
} else if (resultCode == 2 || resultCode == 3) {
signedInOk = false; // wrong login and password
} else {
// get the error message
if (!jsonResponse.isNull("message")) {
mAsyncTaskErrorMsg = jsonResponse.getString("message");
} else {
mAsyncTaskErrorMsg = getString(R.string.internal_error);
}
}
} else{
Log.e(TAG, conn.getResponseMessage());
}
} catch (JSONException e) {
Log.e(TAG, e.getMessage());
mAsyncTaskErrorMsg = e.getMessage();
} catch (IOException e) {
Log.e(TAG, e.getMessage());
mAsyncTaskErrorMsg = e.getMessage();
} finally {
if (conn != null)
conn.disconnect();
}
Log.i(TAG, "End auth...");
return signedInOk;
}
@Override
protected void onPostExecute(final Boolean success) {
mAuthTask = null;
showProgress(false);
if (success) {
// store the userId
SharedPreferences.Editor ed = mPrefs.edit();
ed.putString("session_cookie", mSessionCookie);
ed.putLong("session_cookie_time", System.currentTimeMillis());
ed.apply();
// start main
Intent intent = new Intent(mContext, MainActivity.class);
startActivity(intent);
finish();
} else {
if (!mAsyncTaskErrorMsg.isEmpty()) {
// show the error message
new AlertDialog.Builder(mContext)
.setTitle("Error occured")
.setMessage(mAsyncTaskErrorMsg)
.setNeutralButton(android.R.string.ok,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
dialog.cancel();
}
}).show();
} else {
mPasswordView
.setError(getString(R.string.error_incorrect_password));
mPasswordView.requestFocus();
}
}
}
@Override
protected void onCancelled() {
mAuthTask = null;
showProgress(false);
}
}
/**
* Represents an asynchronous login task used to authenticate
* the user via Facebook.
*/
public class UserFacebookLoginTask extends AsyncTask<Void, Void, Boolean> {
private Context mContext;
public UserFacebookLoginTask(Context context) {
this.mContext = context;
}
@Override
protected Boolean doInBackground(Void... params) {
Log.i(FB_TAG, "Begin Facebook validation...");
HttpURLConnection conn = null;
StringBuilder sb = new StringBuilder();
BufferedOutputStream printout;
boolean signedInOk = false;
try {
URL url = new URL(mRestApiUrl + SOCIAL_REST_METHOD_NAME);
conn = (HttpURLConnection) url.openConnection();
conn.setDoInput(true);
conn.setDoOutput(true);
conn.setUseCaches(false);
conn.setConnectTimeout(mConnectionTimeout);
conn.setReadTimeout(mReadTimeout);
conn.setRequestMethod("POST");
conn.setRequestProperty("Content-Type","application/json; charset=utf-8");
conn.connect();
//Create JSONObject here
JSONObject jsonParam = new JSONObject();
jsonParam.put("provider", "facebook");
jsonParam.put("token", mFacebookAccessToken);
jsonParam.put("uid", mFacebookUserId);
// Send POST output.
printout = new BufferedOutputStream(conn.getOutputStream());
printout.write(jsonParam.toString().getBytes("UTF-8"));
printout.flush();
printout.close();
int httpCode = conn.getResponseCode();
if (httpCode == HttpURLConnection.HTTP_OK) {
BufferedReader br = new BufferedReader(new InputStreamReader(conn.getInputStream(), "UTF-8"));
String line = null;
while ((line = br.readLine()) != null) {
sb.append(line + "\n");
}
br.close();
Log.i(FB_TAG, sb.toString());
JSONObject jsonResponse = new JSONObject(sb.toString());
int resultCode = jsonResponse.getInt("code");
if (resultCode == 0) {
// get the session id
String cookie = conn.getHeaderField("Set-Cookie");
if (cookie != null) {
Log.i(FB_TAG, cookie);
signedInOk = true;
mSessionCookie = cookie;
Log.i(FB_TAG, "Authenticated");
}
} else if (resultCode == 2 || resultCode == 3) {
signedInOk = false; // no such user in the database
mAsyncTaskErrorMsg = "";
} else {
// get the error message
if (!jsonResponse.isNull("message")) {
mAsyncTaskErrorMsg = jsonResponse.getString("message");
} else {
mAsyncTaskErrorMsg = getString(R.string.internal_error);
}
}
} else{
Log.e(FB_TAG, conn.getResponseMessage());
}
} catch (JSONException e) {
Log.e(FB_TAG, e.getMessage());
mAsyncTaskErrorMsg = e.getMessage();
} catch (IOException e) {
Log.e(FB_TAG, e.getMessage());
mAsyncTaskErrorMsg = e.getMessage();
} finally {
if (conn != null)
conn.disconnect();
}
Log.i(FB_TAG, "End auth...");
return signedInOk;
}
@Override
protected void onPostExecute(final Boolean success) {
mFacebookAuthTask = null;
showProgress(false);
if (success) {
// store the userId
SharedPreferences.Editor ed = mPrefs.edit();
ed.putString("session_cookie", mSessionCookie);
ed.putLong("session_cookie_time", System.currentTimeMillis());
ed.apply();
// start main
Intent intent = new Intent(mContext, MainActivity.class);
startActivity(intent);
finish();
} else {
if (!mAsyncTaskErrorMsg.isEmpty()) {
// show the error message
new AlertDialog.Builder(mContext)
.setTitle("Error occured")
.setMessage(mAsyncTaskErrorMsg)
.setNeutralButton(android.R.string.ok,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
dialog.cancel();
}
}).show();
}
}
}
@Override
protected void onCancelled() {
mFacebookAuthTask = null;
showProgress(false);
}
}
}
FBLoginFragment.java:
package com.everporter.everporter;
import java.util.Arrays;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
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;
public class FBLoginFragment extends Fragment {
private static final String TAG = "FBLoginFragment";
private UiLifecycleHelper mUiHelper;
private OnFBAccessTokenPass mTokenPasser;
private String mSessionToken;
private Session.StatusCallback callback = new Session.StatusCallback() {
@Override
public void call(Session session, SessionState state, Exception exception) {
onSessionStateChange(session, state, exception);
}
};
private void onSessionStateChange(Session session, SessionState state, Exception exception) {
if (state.isOpened()) {
Log.i(TAG, "Logged in...");
mSessionToken = session.getAccessToken();
// Request user data and show the results
Request.executeMeRequestAsync(session, new Request.GraphUserCallback() {
@Override
public void onCompleted(GraphUser user, Response response) {
if (user != null) {
// pass the access token to the activity
// with the user id
mTokenPasser.onFBAccessTokenPass(mSessionToken, user.getId());
}
}
});
} else if (state.isClosed()) {
Log.i(TAG, "Logged out...");
mSessionToken = "";
}
}
public interface OnFBAccessTokenPass {
public void onFBAccessTokenPass(String accessToken, String uid);
}
@Override
public void onAttach(Activity a) {
super.onAttach(a);
mTokenPasser = (OnFBAccessTokenPass) a;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mUiHelper = new UiLifecycleHelper(getActivity(), callback);
mUiHelper.onCreate(savedInstanceState);
}
@Override
public View onCreateView(LayoutInflater inflater,
ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fb_login_fragment, container, false);
LoginButton authButton = (LoginButton) view.findViewById(R.id.authButton);
authButton.setFragment(this);
authButton.setReadPermissions(Arrays.asList("email"));
return view;
}
@Override
public void onResume() {
super.onResume();
// For scenarios where the main activity is launched and user
// session is not null, the session state change notification
// may not be triggered. Trigger it if it's open/closed.
Session session = Session.getActiveSession();
if (session != null &&
(session.isOpened() || session.isClosed())) {
onSessionStateChange(session, session.getState(), null);
}
mUiHelper.onResume();
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
mUiHelper.onActivityResult(requestCode, resultCode, data);
}
@Override
public void onPause() {
super.onPause();
mUiHelper.onPause();
}
@Override
public void onDestroy() {
super.onDestroy();
mUiHelper.onDestroy();
}
@Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
mUiHelper.onSaveInstanceState(outState);
}
}
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.everporter.everporter"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="10"
android:targetSdkVersion="17" />
<uses-permission android:name="android.permission.INTERNET"/>
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.everporter.everporter.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="com.everporter.everporter.LoginActivity"
android:label="@string/title_activity_login"
android:noHistory="true"
android:excludeFromRecents="true"
android:windowSoftInputMode="adjustResize|stateVisible" >
</activity>
<meta-data android:name="com.facebook.sdk.ApplicationId" android:value="@string/fb_app_id"/>
<activity android:name="com.facebook.LoginActivity" android:label="@string/app_name"></activity>
</application>
</manifest>
आपने मेरा दिन बचाया, गंभीरता से यह लगभग अवांछनीय त्रुटि है। दोस्त बहुत - बहुत धन्यवाद। – manish
हास्यास्पद है कि एंड्रॉइड लॉग इन करने के लिए कुछ भी नहीं है! धन्यवाद, लंबे समय तक समस्या पर फंस गया! –
पवित्र बकवास मुझे खुशी है कि आप इसे ठीक करने में कामयाब रहे हैं, आपके अपने प्रश्न का उत्तर देने के लिए धन्यवाद। :) – Tom