Random with sinking probability when already used in android studio

I want to know how to drop the probability in android studio of a random text, which already has been used, while the other ones keep theirs. So I have this code here and now I'm asking for a solution for my problem.

    <?xml version="1.0" encoding="utf-8"?>
<resources>
    <string-array name="name">
        <item>One</item>
        <item>Two</item>
        <item>Three</item>



    </string-array>

    <string name="app_name">Drink</string>
</resources>

import android.app.Activity;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

import java.util.Random;

public class partymodus extends Activity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_partymodus);

        final TextView aufgabe=(TextView)findViewById(R.id.txt_aufgabe);
        final Button next =  (Button)findViewById(R.id.btn_next);

        next.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                // Perform action on click
                String[] aufgaben = getResources().getStringArray(R.array.name);
                Random rand = new Random();
                int n = rand.nextInt(aufgaben.length - 0) + 0;
                aufgabe.setText(aufgaben[n]);

            }
        });
    }
}