I can´t use getResource().getString in Android

Issue

I am overriding a method that returns a CharSequence and it returns charSequecence. I have also tried returning a String. Here is the code

public String getPageTitle(int position) {
    return  getResource().getString(R.string.tabla_del) + ": " + (position + 1);
}

Solution

There are, generally, three reasons to fail this:

The first one, no exists a Context. Solving this, you need to pass a context object to method that use it:

public String getPageTitle(Context context, int position) {
    return  context.getResource().getString(R.string.tabla_del) + ": " + (position + 1);
}

Context variable is passed from Activity/Fragment but it can be avoid if method exists inside a Activity/Fragment; there only need getContext() or getApplicationContext() method depends on if it's Activity or Fragment.

public String getPageTitle(int position) {
    return  getContext().getResource().getString(R.string.tabla_del) + ": " + (position + 1);
}

The second one, no exists R class imported. You should check if your class exists inside subpackages, for instance: Your main package is com.example.androidapp it is described on AndroidManifest and gradle files. So, if your class exists on com.example.androidapp.configuration you need import R class from main package:

package com.example.androidapp.configuration
...
import com.example.androidapp.R;
...
public class Configuration {
    ...
}

The third one, no exists strings you need on strings file. Here you should create a strings files and add strings you need.

Answered By - Juan Castaño