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Android: Value out of JSONObject/responseListener

I try to save the userid to work with it in a different Activity, but I was not able to get the value out of the try catch statement. I should mention that I am new to Android. (Also the AlertDialog is not working but that is not important). Thanks for help!
EDIT: I just found this out: The code down below is for the "First Screen" (shown by the first start of the App) and after you click on the button you will get to the MainActivity. If I close the App after the First Screen opened MainActivity, and open it again, the SharedPreferences are working perfectly.
button = (Button) findViewById(R.id.savebtn);
button.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
next_page(v);
}
});
}
public void next_page(View v){
final String firstname1 = firstnameFS.getText().toString();
final String lastname1 = lastnameFS.getText().toString();
Response.Listener<String> responseListener = new Response.Listener<String>(){
#Override
public void onResponse(String response){
try{
JSONObject jsonResponse = new JSONObject(response);
boolean success =jsonResponse.getBoolean("success");
int userid = jsonResponse.getInt("userid");
if(success){
AlertDialog.Builder builder3 = new AlertDialog.Builder(FirstScreen.this);
builder3.setMessage("Updated! Id:"+userid);
builder3.create().show();
SharedPreferences mySPR = getSharedPreferences("MySpFile", MODE_PRIVATE);
SharedPreferences.Editor editor = mySPR.edit();
editor.putString("firstnameSP", firstname1);
editor.putInt("useridSP", userid);
editor.commit();
}else{
AlertDialog.Builder builder = new AlertDialog.Builder(FirstScreen.this);
builder.setMessage("Update Failed");
builder.create().show();
}
} catch (JSONException e){
e.printStackTrace();
}
}
};
RegisterRequestFS registerRequestFS =new RegisterRequestFS(firstname1,lastname1, responseListener);
RequestQueue queue = Volley.newRequestQueue(FirstScreen.this);
queue.add(registerRequestFS);

Simply move your shared preferences edit command inside the if(success) block.
After committing the useridSP inside your shared preference retrieve it with this code:
SharedPreferences mySPR = getSharedPreferences("MySpFile", MODE_PRIVATE);
mySPR.getInt("useridSP",-1);
-1 value stays for default value, so be aware that if you get -1 for the useridSP in the new activity you're doing something wrong

how to maintain session using Shared Preferences

I am developing an app,in that i am maintaining Session using Shared Preferences.I that when user login,i am using their email id for further use.But when i tried to use that email in another activity, it is showing null.
Below in my code for mainActivity:
public class main extends AppCompatActivity {
public Button submit;
public static final String MyPREFERENCES = "MyPrefs" ;
public static final String email = "emailkey";
SharedPreferences sharedpreferences;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity1);
submit = (Button) findViewById(R.id.btn_login);
ImageView i1 = (ImageView) findViewById(R.id.imgLogo);
String checkBoxText = "I agree to all the";
final CheckBox checkBox = (CheckBox) findViewById(R.id.checkBox);
sharedpreferences = getSharedPreferences(MyPREFERENCES, Context.MODE_PRIVATE);
checkBox.setText(Html.fromHtml(checkBoxText));
checkBox.setMovementMethod(LinkMovementMethod.getInstance());
submit.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
EditText e1 = (EditText) findViewById(R.id.input_email);
EditText p1 = (EditText) findViewById(R.id.input_password);
String e = e1.getText().toString();
final String password = p1.getText().toString();
SharedPreferences.Editor editor = sharedpreferences.edit();
editor.putString(email, e);
editor.commit();
Here is my code for another activity:
String e,email;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.internshipsdetails);
SharedPreferences sharedpreferences = getSharedPreferences(main.MyPREFERENCES, Context.MODE_PRIVATE);
sharedpreferences.getString(email,e);
String url = "url?COMP_REQ_ID=" + title + "&StuEmail=" + e;
AQuery mAQuery = new AQuery(InternShipsDetails.this);
mAQuery.ajax(url, String.class, new AjaxCallback<String>() {
#Override
public void callback(String url, String data, AjaxStatus status) {
super.callback(url, data, status);
if (BuildConfig.DEBUG) {
Log.d("###$Request URL", url + "");
Log.d("###$Response ", data + "");
Log.d("###$Status Message : ", status.getMessage() + "");
Log.d("###$Status Code : ", status.getCode() + "");
}

You can manage session by changing shared preference values after doing logout action and check preference again at the time of login also. You can save current time also in a string at login and logout action. Make sure to use private shared preferences.

You are passing the wrong key to shared Pref because of that you are getting null.
Following is the updated code of yours which will give you the stored email address:
SharedPreferences sharedpreferences = getSharedPreferences(main.MyPREFERENCES, Context.MODE_PRIVATE);
e = sharedpreferences.getString(main.email,"");
String url = "url?COMP_REQ_ID=" + title + "&StuEmail=" + e;
Happy coding !!!

getString (String key, String defValue) method returns a String. So, you need to catch the output in a string variable.
Also, you are passing a nullkey. You need to pass the same key using which you saved the value.
So, in your case it would be
e = sharedpreferences.getString("emailkey","nodata");

How can i compare current screen Edit text field value with shared preference value which is present in next screen?

public class Loginscreen extends Activity {
private EditText phonenumber,password;
private Button signin,joinus,supportus;
private TextView forgot_password;
String mobilenumber;
String passwordtxt;
#Override
protected void onCreate(final Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.loginscreen);
phonenumber = (EditText) findViewById(R.id.edt_username);
password = (EditText) findViewById(R.id.edt_password);
signin = (Button) findViewById(R.id.bt_signin);
joinus = (Button) findViewById(R.id.bt_joinus);
supportus = (Button) findViewById(R.id.bt_supportus);
forgot_password = (TextView) findViewById(R.id.txt_remember_pawd);
final String user = phonenumber.getText().toString();
final String pass = password.getText().toString();
signin.setOnClickListener(
new View.OnClickListener() {
#Override
public void onClick(View v) {
//final Intent intent;
SharedPreferences pref = getApplicationContext().getSharedPreferences("MyPref", MODE_PRIVATE);
final String pasword = pref.getString("pwd", null);
final String phnenumber = pref.getString("mobilenumber", null);
if ( pass == pasword && user == phnenumber && !pass.isEmpty()){
Toast.makeText(Loginscreen.this, "correct ", Toast.LENGTH_SHORT).show();
}
else{
Toast.makeText(Loginscreen.this, "Incorrect Mobile number or password", Toast.LENGTH_SHORT).show();
}
}
});
in above code how can i compare the shared preference value with current edit text value....i used shared preference in another page..
#Override
public void onPostExecute(String result) {
JSONObject jsonobject = null;
try {
jsonobject = new JSONObject(result);
JSONObject object = jsonobject.getJSONObject("data");
String id = object.getString("_id");
SharedPreferences pref = getApplicationContext().getSharedPreferences("MyPref", MODE_PRIVATE);
pref.getString("key_name1",null);
//final String encoded = pref.getString("key_name1",null);
String password = getIntent().getStringExtra("_password");
String mobilen = getIntent().getStringExtra("mobile");
SharedPreferences.Editor editor = pref.edit();
editor.putString("pwd",password);
editor.putString("mobilenumber",mobilen);
editor.putString("user_id",id);
editor.commit();
} catch (JSONException e) {
e.printStackTrace();
}
the above code is present in another activity..how can i use that shared preference value in LoginScreen to compare both the values are equal are not

You should use equals() instead of ==.
Change this part of the code:
if ( pass == pasword && user == phnenumber && !pass.isEmpty()){
Toast.makeText(Loginscreen.this, "correct ", Toast.LENGTH_SHORT).show();
} else{
Toast.makeText(Loginscreen.this, "Incorrect Mobile number or password", Toast.LENGTH_SHORT).show();
}
to:
if ( password.getText().toString().equals(password) && phonenumber.getText().toString().equals(phnenumber) && !pass.isEmpty()){
Toast.makeText(Loginscreen.this, "correct ", Toast.LENGTH_SHORT).show();
} else{
Toast.makeText(Loginscreen.this, "Incorrect Mobile number or password", Toast.LENGTH_SHORT).show();
}

You can do this with intent.
in your first screen write below code on some button click.
Intent i=new Intent(FirstActivity.this,SecondActivity.class);
i.putExtra("editTextvalue",editText.getText().toString());
startActivity(i);
in your second screen write below code in onCreate()
String value=getIntent().getStringExtra("editTextvalue");
campare this value with your sharedPreferences value.

Sharing the SharedPreferences

I have 2 activities namely MainActivity and OKActivity. The MainActivity statically checks for a password and lets you go to the OKActivity. I have used SharedPrefrences in the OKActivity for changing the password to a new one.
public class MainActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final EditText password = (EditText) findViewById(R.id.editText_Password);
Button enter = (Button) findViewById(R.id.button);
enter.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View arg0) {
String user_pass;
user_pass = password.getText().toString();
if (user_pass.isEmpty()) {
AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(MainActivity.this);
dialogBuilder.setIcon(R.drawable.ic_launcher);
dialogBuilder.setTitle("Oops!");
dialogBuilder.setMessage("Password Field Cannot Be Empty");
dialogBuilder.setPositiveButton("OK", null);
dialogBuilder.show();
}
else
if (user_pass.equals("123")) {
Toast.makeText(MainActivity.this, "Welcome!", Toast.LENGTH_SHORT).show();
Intent I = new Intent("com.mavenmaverick.password.OKActivity");
startActivity(I);
}
else
if(user_pass != ("123")){
Toast.makeText(MainActivity.this, "Incorrect", Toast.LENGTH_SHORT).show();
AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(MainActivity.this);
dialogBuilder.setIcon(R.drawable.ic_launcher);
dialogBuilder.setTitle("Oops!");
dialogBuilder.setMessage("Incorrect Password");
dialogBuilder.setPositiveButton("OK", null);
dialogBuilder.show();
}
}
});
}
public class OKActivity extends Activity {
EditText newPassword;
String newUserPassword;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_ok);
newPassword = (EditText) findViewById(R.id.new_password);
newUserPassword = newPassword.getText().toString();
getpasswordSharedPreferences();
Button changePassword = (Button) findViewById(R.id.button_change);
changePassword.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View arg0) {
newUserPassword = newPassword.getText().toString();
getpasswordSharedPreferences();
setSharedPreferences();
}
});
}
private String getpasswordSharedPreferences() {
SharedPreferences userPassword = getSharedPreferences("USER_PASSWORD", MODE_PRIVATE);
String password = userPassword.getString("THE_PASSWORD", "123");
return password;
}
private void setSharedPreferences() {
SharedPreferences userPassword = getSharedPreferences("USER_PASSWORD", MODE_PRIVATE);
SharedPreferences.Editor password_edior = userPassword.edit();
password_edior.putString("THE_PASSWORD", newUserPassword);
password_edior.commit();
Toast.makeText(OKActivity.this, "Password Change Succesful", Toast.LENGTH_SHORT).show();
AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(OKActivity.this);
dialogBuilder.setIcon(R.drawable.ic_launcher);
dialogBuilder.setTitle("Done!");
dialogBuilder.setMessage("New Password : "+newUserPassword);
dialogBuilder.setPositiveButton("OK", null);
dialogBuilder.show();
}
How can I access the SharedPrefrences in OKActivity for the password and use it in my MainActivity to allow access thereby making things dynamic over user-interaction cycles.

Just access the SharedPreferences in your OKActivity and in your MainActivity. The trick is to use the same TAG name - in your case it's 'USER_PASSWORD'.
Have a look at this --> SharedPreferences

Create a SharedPrefrences.java //then we can use when ever we need
public class SharedPrefrences {
public static void saveData(String name, String value, Context context) {
try {
SharedPreferences settings = context
.getSharedPreferences(Configuration.getPrefsName(), 0);
SharedPreferences.Editor editor = settings.edit();
editor.putString(name, value);
editor.commit();
} catch (NullPointerException ignored) {
}
}
public static String getData(String name, Context context) {
try {
SharedPreferences settings = context
.getSharedPreferences(Configuration.getPrefsName(), 0);
return settings.getString(name, "");
} catch (NullPointerException ignored) {
return "";
}
}
}
//In MainActivity
SharedPrefrences.saveData("Password","123456", getApplicationContext());
//In OKActivity
String passwordfromMainActivty = PreferencesUtils.getData("Password", getApplicationContext());
//To Add Newpassword
SharedPrefrences.saveData("NewPassword","abcd", getApplicationContext());

You get the same way in both activity's. Do get of your SharedPreferences with the same TAG.
private String getpasswordSharedPreferences() {
SharedPreferences userPassword = getSharedPreferences("USER_PASSWORD", MODE_PRIVATE);
String password = userPassword.getString("THE_PASSWORD", "123");
return password;
}
Maybe you can put this method's in other class, and call when you want from all activities:
You can put your set method here too
For example:
public class SharedPrefs {
private static final String SHARED_PREF = "USER_PASSWORD";
private static final String KEY_PASSWORD = "THE_PASSWORD";
public static void getStoredSharedPref(Context context, String key, String value) {
SharedPreferences sharedPref = context.getSharedPreferences(SHARED_PREF, Context.MODE_PRIVATE);
SharedPreferences.Editor editor = sharedPref.edit();
editor.putString(propertyKey, value);
editor.commit();
}
}
and then call in your activities
SharedPrefs.getStoredSharedPref(context, SharedPrefsUtils.KEY_PASSWORD,"1234");

Android SharedPreferences not loading and saving properly

I've been getting null returns from getting strings from my saved preferences. I'm not sure how savedpreferences worked but my understanding was that when call a sharedpreferences, it creates the keypair file on the phone so you can come back to it later.
My program is essentially a string creation application. When you press a button, it creates a string to send as an sms. My settings activity page has four edittexts that save whatever is inside them with a buttonclick and returns to the main activity. The final button creates a String by getting the value from the keyvalue pair and constructs the message. However, I've always gotten null for each of the values.
Heres the code for the settings page and then the main page. Please ask if I could add more, I didn't add ALL of the code, just the sharedpreferences portions.
public SharedPreferences sp;
public Editor e;
public void savethethings(){ //run this when enter is pressed/savew
EditText smsintro_hint = (EditText) findViewById(R.id.settings_smsintro_hint);
EditText smsbody_hint = (EditText) findViewById(R.id.settings_smsbody_hint);
EditText checkboxbody_hint = (EditText) findViewById(R.id.settings_checkboxbody_hint);
EditText checkboxbody_description_hint = (EditText) findViewById(R.id.settings_checkboxbody_description_hint);
String introstring = smsintro_hint.getText().toString();
String bodystring = smsbody_hint.getText().toString();
String checkboxbodystring = checkboxbody_hint.getText().toString();
String checkboxdescriptionstring = checkboxbody_description_hint.getText().toString();
e.putString("intro", introstring);
e.commit(); // you forgot to commit
if(!bodystring.isEmpty())
{
e.putString("body", bodystring);
e.commit();
}
if(!checkboxbodystring.isEmpty())
{
e.putString("checkbody", checkboxbodystring);
e.commit();
}
if(!checkboxdescriptionstring.isEmpty())
{
e.putString("checkboxdescr", checkboxdescriptionstring);
e.commit();
}
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.settingmenu);
//SP
sp = PreferenceManager.getDefaultSharedPreferences(getApplicationContext()); // forget about
// named preferences - get the default ones and finish with it
e = sp.edit();
Button tt = (Button)findViewById(R.id.savebutton);
tt.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
finish();
}
});
public void save(View view)
{
//THINGS HAPPEN HERE WITH SHARED PREFERENCES :(
savethethings();
this.finish();
return;
}
public String finishedtext(String userstring)
{
smsintroduction = (sp.getString("intro", ""));
smsbody = (sp.getString("body", ""));
checkboxtext = (sp.getString("checkbody", ""));
checkboxmessage = (sp.getString("checkboxdescr", ""));
if(smsintroduction.isEmpty())
{
if(smsbody.isEmpty())
{
if(checkboxtext.isEmpty())
{
if(checkboxmessage.isEmpty()) //topkek for most AND statements Ive ever put in in if/then form
{
//Essentially the DEFAULT if they're ALL null
smsbody = "Hi "+ userstring +"! This is coming from jake's phone and it wants to send a text so we can talk or whatever. ";
}
}
}
}
Toast.makeText( this, "Creating text, then press send!", Toast.LENGTH_LONG).show();
String thetext = "";
thetext = smsintroduction + " " + smsbody + " " + checkboxtext;
return thetext;
}
public void savethethings(){ //run this when enter is pressed/savew
EditText smsintro_hint = (EditText) findViewById(R.id.settings_smsintro_hint);
EditText smsbody_hint = (EditText) findViewById(R.id.settings_smsbody_hint);
EditText checkboxbody_hint = (EditText) findViewById(R.id.settings_checkboxbody_hint);
EditText checkboxbody_description_hint = (EditText) findViewById(R.id.settings_checkboxbody_description_hint);
String introstring = smsintro_hint.getText().toString();
String bodystring = smsbody_hint.getText().toString();
String checkboxbodystring = checkboxbody_hint.getText().toString();
String checkboxdescriptionstring = checkboxbody_description_hint.getText().toString();
// if(!introstring.isEmpty()) //if the fields are NOT empty, they should get saved.
// {
e.putString("intro", introstring);
e.commit(); // you forgot to commit
if(!bodystring.isEmpty())
{
e.putString("body", bodystring);
e.commit();
}
if(!checkboxbodystring.isEmpty())
{
e.putString("checkbody", checkboxbodystring);
e.commit();
}
if(!checkboxdescriptionstring.isEmpty())
{
e.putString("checkboxdescr", checkboxdescriptionstring);
e.commit();
}
}

Create java class named SessionManger and put all your methods for setting and getting SharedPreferences values. When you want to save value use the object of this class and set and get the values.
Sample code given below.
public class SessionManager {
SharedPreferences pref;
SharedPreferences.Editor editor;
Context _context;
int PRIVATE_MODE = 0;
public SessionManager(Context context) {
this._context = context;
pref = _context.getSharedPreferences("name_that_you_use", PRIVATE_MODE);
editor = pref.edit();
editor.apply();
}
public void setIntroMessage(String data) {
editor.putString("intro", data);
editor.commit();
}
public String getIntroMessage() {
return pref.getString("intro", null);
}
}