关于androidstudio简易计算器可以给个代码例子吗

当然可以，以下是一个简单的安卓计算器的代码（Java语言）：

package com.example.calculator;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

public class MainActivity extends AppCompatActivity {

    EditText etNum1, etNum2, etResult;
    Button btnAdd, btnSubtract, btnMultiply, btnDivide;

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

        etNum1 = findViewById(R.id.etNum1);
        etNum2 = findViewById(R.id.etNum2);
        etResult = findViewById(R.id.etResult);

        btnAdd = findViewById(R.id.btnAdd);
        btnSubtract = findViewById(R.id.btnSubtract);
        btnMultiply = findViewById(R.id.btnMultiply);
        btnDivide = findViewById(R.id.btnDivide);

        btnAdd.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                double num1 = Double.parseDouble(etNum1.getText().toString());
                double num2 = Double.parseDouble(etNum2.getText().toString());
                double result = num1 + num2;
                etResult.setText(String.valueOf(result));
            }
        });

        btnSubtract.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                double num1 = Double.parseDouble(etNum1.getText().toString());
                double num2 = Double.parseDouble(etNum2.getText().toString());
                double result = num1 - num2;
                etResult.setText(String.valueOf(result));
            }
        });

        btnMultiply.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                double num1 = Double.parseDouble(etNum1.getText().toString());
                double num2 = Double.parseDouble(etNum2.getText().toString());
                double result = num1 * num2;
                etResult.setText(String.valueOf(result));
            }
        });

        btnDivide.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                double num1 = Double.parseDouble(etNum1.getText().toString());
                double num2 = Double.parseDouble(etNum2.getText().toString());
                double result = num1 / num2;
                etResult.setText(String.valueOf(result));
            }
        });
    }
}

注意：以上代码只是一个简单的计算器，缺少输入验证和错误处理等功能，仅供参考。