dialoginterface

import android.app.AlertDialog;
import android.content.DialogInterface;
import android.os.Bundle;
import androidx.appcompat.app.AppCompatActivity;

public class MainActivity extends AppCompatActivity {

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

        // 创建AlertDialog.Builder对象
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setTitle("提示")
               .setMessage("这是一个AlertDialog示例")
               .setPositiveButton("确定", new DialogInterface.OnClickListener() {
                   public void onClick(DialogInterface dialog, int which) {
                       // 用户点击确定按钮后的操作
                   }
               })
               .setNegativeButton("取消", new DialogInterface.OnClickListener() {
                   public void onClick(DialogInterface dialog, int which) {
                       // 用户点击取消按钮后的操作
                   }
               });

        // 创建并显示对话框
        AlertDialog dialog = builder.create();
        dialog.show();
    }
}