How to use sharedPrefrence putString?

Question

I want to use sharedprefrence string form another activity but the value is not being passed it always passes the default value? Creation of variable toast Shows inp value but value is not being passed

                name_next = (Button) findViewById(R.id.name_next);
                sp= getSharedPreferences("name_pref",Context.MODE_PRIVATE);

                name_next.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        inp = nameInput.getText().toString();
                        SharedPreferences.Editor editor= sp.edit();
                        editor.putString(inp,nameInput);
                        editor.commit();
                        Toast.makeText(com.calmo.name.this,"welcome "+inp,Toast.LENGTH_LONG).show();
                        Intent intent = new Intent(name.this,MainActivity.class);
                        startActivity(intent);
                    }
                });```    
**Calling **
**The Value is always returned as error that is default**

```            SharedPreferences sp=getApplicationContext().getSharedPreferences("name_pref",Context.MODE_PRIVATE);
        String name_in =sp.getString("inp","Error");
        name.setText(name_in);

Answer 1

public class AppSharedPreferences {
public static final String TAG = "AppSharedPreferences";
private static SharedPreferences sharedPref;

private String demo_string = "demo string's key"

public AppSharedPreferences() {

}

public static void init(Context context)
{
    if(sharedPref == null)
        sharedPref = context.getSharedPreferences(
            context.getPackageName(), Activity.MODE_PRIVATE);
}

public static void setDemoString(String demoString) {
    Editor prefs = sharedPref.edit();
    prefs.putString(demo_string, demoString);
    prefs.apply();
}

public static String getDemoString() {
    return sharedPref.getString(demo_string, "");
}}

Put this wherever u want to use shared prefs:

AppSharedPreferences.init(this);

You can exchange this for activity or context, depending on where you use the code.

To set value in preference, use this code:

AppSharedPreferences.setDemoString("Some Text");

To get the value from preference:

String text = AppSharedPreferences.getDemoString();