How to figure out why app is crashing when trying to access SystemPreferences data

Question

I am trying to maintain a userID and username throughout my app. I created a class called Session that places and receives data to SharedPreferences and setting it works just fine. The problem I am getting is when I go to retrieve it in another activity.

The Session Class Constructor

 public Session(Context cntx) {
        // TODO Auto-generated constructor stub
        prefs = PreferenceManager.getDefaultSharedPreferences(cntx);
    }

The Session Class method to add a userID and the method to retrieve it

 public void setUserID(int userID) {
        prefs.edit().putInt("userID", userID).apply();
    }

public int getID() {
        int userID;

        return userID = prefs.getInt("userID",0);

    }

Setting the ID on login

 StringRequest stringRequest = new StringRequest(Request.Method.POST, server_url, new Response.Listener<String>() {
                    @Override
                    public void onResponse(String response) {

                        builder.setTitle("Server Response");
                        builder.setMessage("Response :"+response);

                        session = new Session(getApplicationContext());
                        int responseInt = Integer.parseInt(response.trim());
                        session.setUserID(responseInt);

                        Intent myIntent = new Intent(LoginActivity.this, navActivity.class);
                        startActivity(myIntent);
                        finish();

Trying to retrieve that ID and putting into an editText

 @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_my_jars);
        session = new Session(getApplicationContext());
        userID = (EditText) findViewById(R.id.userID);
        builder = new AlertDialog.Builder(MyJars.this);
        userID.setText(session.getID());

I wanted to be able to pull that data and send it to my server where I can run my PHP scripts as I have with other activities but this isn't cooperating.

"this isn't cooperating." - What happens? Is there a crash? Do you have a LogCat stacktrace? — PPartisan, Apr 27 '19 at 17:26
Yes - please update your question to include the stacktrace (although Forpas may be onto something with their answer) — PPartisan, Apr 27 '19 at 17:29
It isn't crashing anymore, Forpas's answer worked. Should I still add the old LogCat for future users? — Jacob Swope, Apr 27 '19 at 17:52

score 0 · Accepted Answer · answered Apr 27 '19 at 17:28

0

In this line:

userID.setText(session.getID());

session.getID() is an integer and it is interpreted as an integer resource id and not as the string text that you want to set in userID.
Change to this:

userID.setText("" + session.getID());

or

userID.setText(String.valueOf(session.getID()));

answered Apr 27 '19 at 17:28

forpas

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At the risk of sounding ignorant does this mean that only string values can be added to an edit text? – Jacob Swope Apr 27 '19 at 17:34
Anything that can be converted to string. So with `String.valueOf(..)` you can convert a number to string. – forpas Apr 27 '19 at 17:36
Since this worked you may consider accepting the answer – forpas Apr 27 '19 at 17:53
I thought I did I'm sorry. – Jacob Swope Apr 27 '19 at 18:19
Fine, no worries. – forpas Apr 27 '19 at 18:20

How to figure out why app is crashing when trying to access SystemPreferences data

1 Answers1