使用android登录后，我该怎么去下一页？ [英] How can i go to next page after login with facebook using android?
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问题描述
我正在登录页面，用户有选择，如果他们点击按钮（f继续Facebook），他们可以通过Facebook登录，登录后可以去下一页。
在这里我已经把登录的代码与pagebook，它问我的密码为facebook也。问题是，登录后也保留在同一页面上。如果我登录一次，下一次它不会问我Facebook的密码保留在同一页上。
i am making a login page where users are having options like if they click button(f continue with facebook)they can login through facebook and after login they can go to next page. here i have put code of login with pagebook and it ask me password for facebook also.The problem is that after login also its remains on the same page.And if i logged in once then next time it will not ask me password for facebook and remains on the same page.
这是我的Login.java代码：
here is my code for Login.java:
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 int serverResponseCode = 0;
TextView tac1;
EditText email, pass;
private static String url_create_book = "http://cloud.....com/broccoli/login.php";
public static CallbackManager callbackmanager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
FacebookSdk.sdkInitialize(getApplicationContext());
setContentView(R.layout.activity_login);
Get_hash_key();
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
AppEventsLogger.activateApp(this);
fbbutton = (Button) findViewById(R.id.fbtn);
fbbutton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// Call private method
onFblogin();
}
});
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 (response.trim().equals("success")) {
Toast.makeText(Login.this, "Login Success", Toast.LENGTH_SHORT).show();
//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");
} 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
Intent intent = new Intent(getApplicationContext(), Home.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);
finish();
} catch (Exception e) {
Log.d("ERROR", e.toString());
}
}
@Override
public void onCancel() {
// Log.d(TAG_CANCEL, "On cancel");
}
@Override
public void onError(FacebookException error) {
//Log.d(TAG_ERROR, error.toString());
}
});
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
onBackPressed();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
}
推荐答案
您的代码中有几个问题：您正在以fb_login方法启动正常登录...
there are couple of problems in your code: your are initiating your normal login in fb_login method...
另外在 onsuccess （）方法，您需要请求允许撤销用户详细信息...
Also in onsuccess() method you need to request permisssion for retreiving user details...
尝试以下代码：
声明变量
private ProfileTracker mProfileTracker;
Profile profile;
in your onCreate() replace:
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
FacebookSdk.sdkInitialize(getApplicationContext());
setContentView(R.layout.activity_login);
Get_hash_key();
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
AppEventsLogger.activateApp(this);
fbbutton = (Button) findViewById(R.id.fbtn);
fbbutton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// Call private method
onFblogin();
}
});
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 (response.trim().equals("success")) {
Toast.makeText(Login.this, "Login Success", Toast.LENGTH_SHORT).show();
//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);
}
});
}
还可以在您的fb_login方法中替换：
Also in your fb_login method replace:
// Private method to handle Facebook login and callback
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");
} 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
Intent intent = new Intent(getApplicationContext(), Home_page.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);
finish();
} catch (Exception e) {
Log.d("ERROR", e.toString());
}
}
@Override
public void onCancel() {
// Log.d(TAG_CANCEL, "On cancel");
}
@Override
public void onError(FacebookException error) {
//Log.d(TAG_ERROR, error.toString());
}
});
}
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