如何让用户“输入”答案并使editText消失？ [ANDROID STUDIO]

Here is my code:

这是我的代码:

import android.os.CountDownTimer;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.text.Editable;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import java.util.Random;
import java.util.Scanner;


public class game1 extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_game1);


final Button loseStarter1;

    loseStarter1 = (Button) findViewById(R.id.Starter1);
    loseStarter1.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            loseStarter1.setVisibility(View.GONE);

            final int[] score = {0};
            Random generateG1 = new Random();
            final int loadG1 = generateG1.nextInt(1000000)+10000;
            final TextView number = (TextView) findViewById(R.id.number);
            number.setText(" "+loadG1);

            new CountDownTimer(120000, 1000) {
                @Override
                public void onTick (long millisUntilFinished) {
                }
                public void onFinish() {
                    TextView result = (TextView) findViewById(R.id.outcome);
                    result.setText("Score: "+ score);
                }
            }.start();

            new CountDownTimer(4000, 1000) {
                @Override
                public void onTick(long millisUntilFinished) {
                }
                public void onFinish() {
                    number.setVisibility(View.GONE);
                    TextView prompt = (TextView) findViewById(R.id.prompt);
                    prompt.setText(" Enter the number");
                    EditText input = (EditText) findViewById(R.id.enterAnswer);
                    Editable answer = input.getText();
                    input.setVisibility(View.GONE);
                    if (answer.equals(loadG1)){
                        score[0] += 1;
                    }
                }
            }.start();

            }
        });
    }

}
import android.os.