Erro no android Studio

Programação
,
#1

Eu escrevi esse codigo aqui

package com.rms.randow;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import android.widget.NumberPicker;
import android.widget.TextView;
import android.widget.Toast;

import org.w3c.dom.Text;

import java.util.Random;

public class MainActivity extends AppCompatActivity {

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

    Boolean et = false;

    int p = 0;
    int tent = 0;
    int resultado;

    int min;
    int max;
    int value;

    public void StartBotton(View v){
        TextView result = v.findViewById(R.id.Txt1);
        TextView t1 = v.findViewById(R.id.tm);
        TextView t2 = v.findViewById(R.id.tx);
        TextView t3 = v.findViewById(R.id.t1);

        EditText nmin = v.findViewById(R.id.min);
        EditText nmax = v.findViewById(R.id.max);
        EditText nvalue = v.findViewById(R.id.value);

        min =  Integer.parseInt(nmin.getText().toString());
        max = Integer.parseInt(nmax.getText().toString());
        value = Integer.parseInt(nmax.getText().toString());

        if(et==false){

                Random rand = new Random();
                resultado = rand.nextInt((max - min) + 1) + min;

                t1.setVisibility(View.INVISIBLE);
                t2.setVisibility(View.INVISIBLE);
                nmin.setVisibility(View.INVISIBLE);
                nmax.setVisibility(View.INVISIBLE);

                t3.setVisibility(View.VISIBLE);
                nvalue.setVisibility(View.VISIBLE);

                et=true;

        }else if(et==true){
            while (p!=resultado) {

                p = value;

                if(p==resultado) {
                    result.setText("Parabens vc acertou, Tentativas: " + tent);
                }else if (p<=resultado) {
                    tent++;
                    result.setText("Chute um valor maior");
                } else {
                    tent++;
                    result.setText("Chute um valor menor");
                }
            }
        }

    }

}

Porem esta dando esse erro quando eu clico no botão

E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.rms.randow, PID: 10294
    java.lang.IllegalStateException: Could not execute method for android:onClick
        at androidx.appcompat.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:446)
        at android.view.View.performClick(View.java:6256)
        at com.google.android.material.button.MaterialButton.performClick(MaterialButton.java:1219)
        at android.view.View$PerformClick.run(View.java:24701)
        at android.os.Handler.handleCallback(Handler.java:789)
        at android.os.Handler.dispatchMessage(Handler.java:98)
        at android.os.Looper.loop(Looper.java:164)
        at android.app.ActivityThread.main(ActivityThread.java:6541)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)
     Caused by: java.lang.reflect.InvocationTargetException
        at java.lang.reflect.Method.invoke(Native Method)
        at androidx.appcompat.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:441)
        at android.view.View.performClick(View.java:6256) 
        at com.google.android.material.button.MaterialButton.performClick(MaterialButton.java:1219) 
        at android.view.View$PerformClick.run(View.java:24701) 
        at android.os.Handler.handleCallback(Handler.java:789) 
        at android.os.Handler.dispatchMessage(Handler.java:98) 
        at android.os.Looper.loop(Looper.java:164) 
        at android.app.ActivityThread.main(ActivityThread.java:6541) 
        at java.lang.reflect.Method.invoke(Native Method) 
        at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240) 
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767) 
     Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.text.Editable android.widget.EditText.getText()' on a null object reference
        at com.rms.randow.MainActivity.StartBotton(MainActivity.java:44)
        at java.lang.reflect.Method.invoke(Native Method) 
        at androidx.appcompat.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:441) 
        at android.view.View.performClick(View.java:6256) 
        at com.google.android.material.button.MaterialButton.performClick(MaterialButton.java:1219) 
        at android.view.View$PerformClick.run(View.java:24701) 
        at android.os.Handler.handleCallback(Handler.java:789) 
        at android.os.Handler.dispatchMessage(Handler.java:98) 
        at android.os.Looper.loop(Looper.java:164) 
        at android.app.ActivityThread.main(ActivityThread.java:6541) 
        at java.lang.reflect.Method.invoke(Native Method) 
        at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240) 
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)

Se alguem poder me ajudar

#2

Algum dos campos de texto está carregando nulo e lançando um NPE, você pode debugar para ver qual deles está causando o erro!