安卓（Android studio）编写一个计算器，可以连续加减乘除，可加小数点，不包含括号以及加减乘除优先算法。

好的，以下是一个简单的安卓计算器示例代码，你可以在Android Studio中创建一个新项目并将其复制到MainActivity.java文件中：

import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    private TextView display;  // 显示屏
    private Button btn0, btn1, btn2, btn3, btn4, btn5, btn6, btn7, btn8, btn9;  // 数字键
    private Button btnAdd, btnSubtract, btnMultiply, btnDivide, btnDot, btnClear, btnEqual;  // 运算键

    private double num1 = 0, num2 = 0;  // 存储两个操作数
    private String operator = "";  // 存储当前运算符
    private boolean isDot = false;  // 记录是否输入过小数点

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

        // 获取控件
        display = findViewById(R.id.display);
        btn0 = findViewById(R.id.btn0);
        btn1 = findViewById(R.id.btn1);
        btn2 = findViewById(R.id.btn2);
        btn3 = findViewById(R.id.btn3);
        btn4 = findViewById(R.id.btn4);
        btn5 = findViewById(R.id.btn5);
        btn6 = findViewById(R.id.btn6);
        btn7 = findViewById(R.id.btn7);
        btn8 = findViewById(R.id.btn8);
        btn9 = findViewById(R.id.btn9);
        btnDot = findViewById(R.id.btnDot);
        btnAdd = findViewById(R.id.btnAdd);
        btnSubtract = findViewById(R.id.btnSubtract);
        btnMultiply = findViewById(R.id.btnMultiply);
        btnDivide = findViewById(R.id.btnDivide);
        btnClear = findViewById(R.id.btnClear);
        btnEqual = findViewById(R.id.btnEqual);

        // 设置点击事件监听器
        btn0.setOnClickListener(this);
        btn1.setOnClickListener(this);
        btn2.setOnClickListener(this);
        btn3.setOnClickListener(this);
        btn4.setOnClickListener(this);
        btn5.setOnClickListener(this);
        btn6.setOnClickListener(this);
        btn7.setOnClickListener(this);
        btn8.setOnClickListener(this);
        btn9.setOnClickListener(this);
        btnDot.setOnClickListener(this);
        btnAdd.setOnClickListener(this);
        btnSubtract.setOnClickListener(this);
        btnMultiply.setOnClickListener(this);
        btnDivide.setOnClickListener(this);
        btnClear.setOnClickListener(this);
        btnEqual.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.btn0:
                inputNumber(0);
                break;
            case R.id.btn1:
                inputNumber(1);
                break;
            case R.id.btn2:
                inputNumber(2);
                break;
            case R.id.btn3:
                inputNumber(3);
                break;
            case R.id.btn4:
                inputNumber(4);
                break;
            case R.id.btn5:
                inputNumber(5);
                break;
            case R.id.btn6:
                inputNumber(6);
                break;
            case R.id.btn7:
                inputNumber(7);
                break;
            case R.id.btn8:
                inputNumber(8);
                break;
            case R.id.btn9:
                inputNumber(9);
                break;
            case R.id.btnDot:
                inputDot();
                break;
            case R.id.btnAdd:
                operator = "+";
                num1 = Double.parseDouble(display.getText().toString());
                display.setText("");
                isDot = false;
                break;
            case R.id.btnSubtract:
                operator = "-";
                num1 = Double.parseDouble(display.getText().toString());
                display.setText("");
                isDot = false;
                break;
            case R.id.btnMultiply:
                operator = "*";
                num1 = Double.parseDouble(display.getText().toString());
                display.setText("");
                isDot = false;
                break;
            case R.id.btnDivide:
                operator = "/";
                num1 = Double.parseDouble(display.getText().toString());
                display.setText("");
                isDot = false;
                break;
            case R.id.btnClear:
                num1 = 0;
                num2 = 0;
                operator = "";
                display.setText("");
                isDot = false;
                break;
            case R.id.btnEqual:
                if (!operator.equals("")) {
                    num2 = Double.parseDouble(display.getText().toString());
                    double result = 0;
                    switch (operator) {
                        case "+":
                            result = num1 + num2;
                            break;
                        case "-":
                            result = num1 - num2;
                            break;
                        case "*":
                            result = num1 * num2;
                            break;
                        case "/":
                            if (num2 != 0) {
                                result = num1 / num2;
                            } else {
                                result = 0;
                            }
                            break;
                    }
                    display.setText(String.valueOf(result));
                    num1 = result;
                    isDot = false;
                }
                break;
        }
    }

    // 输入数字
    private void inputNumber(int num) {
        String text = display.getText().toString();
        if (text.equals("0")) {
            text = "";
        }
        display.setText(text + num);
    }

    // 输入小数点
    private void inputDot() {
        if (!isDot) {
            String text = display.getText().toString();
            if (text.equals("")) {
                text = "0";
            }
            display.setText(text + ".");
            isDot = true;
        }
    }
}

此示例代码只包含加减乘除和小数点功能，不包含括号和加减乘除的优先级规则。如果需要实现更复杂的计算器功能，可以参考其他示例代码或自行开发。