Android studio 使用dialog提示信息

package com.example.androidtest2;

import androidx.appcompat.app.AlertDialog;
import androidx.appcompat.app.AppCompatActivity;

import android.content.DialogInterface;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.ProgressBar;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {
private EditText editText;
private ImageView imageView;
private ProgressBar progressBar;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button button = (Button) findViewById(R.id.Button);
editText =(EditText) findViewById(R.id.edit_text);
imageView = (ImageView) findViewById(R.id.image_view);
progressBar = (ProgressBar) findViewById(R.id.progress_bar);
button.setOnClickListener(this);
}
public void onClick(View v){
switch (v.getId()){
case R.id.Button:
int progress = progressBar.getProgress();
progress = progress+10;
AlertDialog.Builder dialog = new AlertDialog.Builder(MainActivity.this);
dialog.setTitle("有个超级重要的信息");
dialog.setMessage("大家手里还有硬币吗？");
dialog.setCancelable(false);
dialog.setPositiveButton("都给你", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {

}
});
dialog.show();
//这里写逻辑
break;
default:
break;
}

}
}