CODEWITHSUNDEEP
javaandroidandroid-studio
Saeid
Saeid

Reputation: 448

How to use getSharedPreferences in a AppCompatActivity

I have a login class that extends AppCompatActivity but when I want to check my data and use getSharedPreferences() it has runtime error and will force stop! What should i do?

Here is my code:

package biz.test.internet;
import android.content.Context;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.preference.PreferenceActivity;
import android.content.Intent;
import android.preference.PreferenceFragment;
import android.support.v4.content.SharedPreferencesCompat;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.preference.PreferenceManager;
import android.content.Intent;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
import java.util.Random;

public class Login extends AppCompatActivity {
    SharedPreferences sharedpreferences = getSharedPreferences(MyPREFERENCES, Context.MODE_PRIVATE);

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.login);
    }        
}

Note that if i disable SharedPreferences sharedpreferences = getSharedPreferences(MyPREFERENCES, Context.MODE_PRIVATE); then run time error will be fixed and if i use PreferenceActivity instead of AppCompatActivity, setContentView method will have error!

I don't know how to use both of them.

Thank you.

Upvotes: 0

Views: 1000

Answers (1)

Murat Karagöz
Murat Karagöz

Reputation: 37594

You have to put the call inside your onCreate method.

SharedPreferences sharedpreferences;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.login);
    sharedpreferences = getSharedPreferences(MyPREFERENCES, Context.MODE_PRIVATE);
}

Upvotes: 2

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