设计一个安卓计算器要求实现功能 1实现基本的加减乘除运算 2实现开方、平方，倒数运算、阶乘 运算、求任意底的对数运算、任 数的N次方运算 3正弦，余弦，正切，余切运算的源程序代码

以下是一个实现上述功能的安卓计算器的源代码示例：

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class CalculatorActivity extends AppCompatActivity {
    private TextView inputTextView;
    private TextView resultTextView;
    private Button clearButton;
    private Button deleteButton;
    private Button squareButton;
    private Button sqrtButton;
    private Button reciprocalButton;
    private Button factorialButton;
    private Button logButton;
    private Button sinButton;
    private Button cosButton;
    private Button tanButton;
    private Button cotButton;
    private Button addBtn;
    private Button subtractBtn;
    private Button multiplyBtn;
    private Button divideBtn;
    private Button equalBtn;
    private Button decimalBtn;
    private Button zeroBtn;
    private Button oneBtn;
    private Button twoBtn;
    private Button threeBtn;
    private Button fourBtn;
    private Button fiveBtn;
    private Button sixBtn;
    private Button sevenBtn;
    private Button eightBtn;
    private Button nineBtn;

    private StringBuilder inputStr = new StringBuilder();
    private double result = 0.0;
    private boolean isDecimal = false;

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

        inputTextView = (TextView) findViewById(R.id.input_text_view);
        resultTextView = (TextView) findViewById(R.id.result_text_view);
        clearButton = (Button) findViewById(R.id.clear_button);
        deleteButton = (Button) findViewById(R.id.delete_button);
        squareButton = (Button) findViewById(R.id.square_button);
        sqrtButton = (Button) findViewById(R.id.sqrt_button);
        reciprocalButton = (Button) findViewById(R.id.reciprocal_button);
        factorialButton = (Button) findViewById(R.id.factorial_button);
        logButton = (Button) findViewById(R.id.log_button);
        sinButton = (Button) findViewById(R.id.sin_button);
        cosButton = (Button) findViewById(R.id.cos_button);
        tanButton = (Button) findViewById(R.id.tan_button);
        cotButton = (Button) findViewById(R.id.cot_button);
        addBtn = (Button) findViewById(R.id.add_button);
        subtractBtn = (Button) findViewById(R.id.subtract_button);
        multiplyBtn = (Button) findViewById(R.id.multiply_button);
        divideBtn = (Button) findViewById(R.id.divide_button);
        equalBtn = (Button) findViewById(R.id.equal_button);
        decimalBtn = (Button) findViewById(R.id.decimal_button);
        zeroBtn = (Button) findViewById(R.id.zero_button);
        oneBtn = (Button) findViewById(R.id.one_button);
        twoBtn = (Button) findViewById(R.id.two_button);
        threeBtn = (Button) findViewById(R.id.three_button);
        fourBtn = (Button) findViewById(R.id.four_button);
        fiveBtn = (Button) findViewById(R.id.five_button);
        sixBtn = (Button) findViewById(R.id.six_button);
        sevenBtn = (Button) findViewById(R.id.seven_button);
        eightBtn = (Button) findViewById(R.id.eight_button);
        nineBtn = (Button) findViewById(R.id.nine_button);

        clearButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                inputStr = new StringBuilder();
                result = 0.0;
                isDecimal = false;
                inputTextView.setText("");
                resultTextView.setText("");
            }
        });

        deleteButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (inputStr.length() > 0) {
                    char lastChar = inputStr.charAt(inputStr.length() - 1);
                    if (lastChar == '.') {
                        isDecimal = false;
                    }
                    inputStr.deleteCharAt(inputStr.length() - 1);
                    inputTextView.setText(inputStr.toString());
                }
            }
        });

        squareButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (inputStr.length() > 0) {
                    double num = Double.parseDouble(inputStr.toString());
                    result = num * num;
                    resultTextView.setText(String.valueOf(result));
                }
            }
        });

        sqrtButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (inputStr.length() > 0) {
                    double num = Double.parseDouble(inputStr.toString());
                    result = Math.sqrt(num);
                    resultTextView.setText(String.valueOf(result));
                }
            }
        });

        reciprocalButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (inputStr.length() > 0) {
                    double num = Double.parseDouble(inputStr.toString());
                    result = 1.0 / num;
                    resultTextView.setText(String.valueOf(result));
                }
            }
        });

        factorialButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (inputStr.length() > 0) {
                    int num = Integer.parseInt(inputStr.toString());
                    result = 1;
                    for (int i = 1; i <= num; i++) {
                        result *= i;
                    }
                    resultTextView.setText(String.valueOf(result));
                }
            }
        });

        logButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (inputStr.length() > 0) {
                    double num = Double.parseDouble(inputStr.toString());
                    result = Math.log10(num);
                    resultTextView.setText(String.valueOf(result));
                }
            }
        });

        sinButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (inputStr.length() > 0) {
                    double num = Double.parseDouble(inputStr.toString());
                    result = Math.sin(num);
                    resultTextView.setText(String.valueOf(result));
                }
            }
        });

        cosButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (inputStr.length() > 0) {
                    double num = Double.parseDouble(inputStr.toString());
                    result = Math.cos(num);
                    resultTextView.setText(String.valueOf(result));
                }
            }
        });

        tanButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (inputStr.length() > 0) {
                    double num = Double.parseDouble(inputStr.toString());
                    result = Math.tan(num);
                    resultTextView.setText(String.valueOf(result));
                }
            }
        });

        cotButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (inputStr.length() > 0) {
                    double num = Double.parseDouble(inputStr.toString());
                    result = 1.0 / Math.tan(num);
                    resultTextView.setText(String.valueOf(result));
                }
            }
        });

        addBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (inputStr.length() > 0) {
                    double num = Double.parseDouble(inputStr.toString());
                    result += num;
                    inputStr = new StringBuilder();
                    inputTextView.setText("");
                }
            }
        });

        subtractBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (inputStr.length() > 0) {
                    double num = Double.parseDouble(inputStr.toString());
                    result -= num;
                    inputStr = new StringBuilder();
                    inputTextView.setText("");
                }
            }
        });

        multiplyBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (inputStr.length() > 0) {
                    double num = Double.parseDouble(inputStr.toString());
                    result *= num;
                    inputStr = new StringBuilder();
                    inputTextView.setText("");
                }
            }
        });

        divideBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (inputStr.length() > 0) {
                    double num = Double.parseDouble(inputStr.toString());
                    result /= num;
                    inputStr = new StringBuilder();
                    inputTextView.setText("");
                }
            }
        });

        equalBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (inputStr.length() > 0) {
                    double num = Double.parseDouble(inputStr.toString());
                    switch (operation) {
                        case ADD:
                            result += num;
                            break;
                        case SUBTRACT:
                            result -= num;
                            break;
                        case MULTIPLY:
                            result *= num;
                            break;
                        case DIVIDE:
                            result /= num;
                            break;
                        default:
                            break;
                    }
                    inputStr = new StringBuilder();
                    inputTextView.setText("");
                    resultTextView.setText(String.valueOf(result));
                }
            }
        });

        decimalBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (!isDecimal) {
                    if (inputStr.length() == 0) {
                        inputStr.append("0");
                    }
                    inputStr.append(".");
                    inputTextView.setText(inputStr.toString());
                    isDecimal = true;
                }
            }
        });

        zeroBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                inputStr.append("0");
                inputTextView.setText(inputStr.toString());
            }
        });

        oneBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                inputStr.append("1");
                inputTextView.setText(inputStr.toString());
            }
        });

        twoBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                inputStr.append("2");
                inputTextView.setText(inputStr.toString());
            }
        });

        threeBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                inputStr.append("3");
                inputTextView.setText(inputStr.toString());
            }
        });

        fourBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                inputStr.append("4");
                inputTextView.setText(inputStr.toString());
            }
        });

        fiveBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                inputStr.append("5");
                inputTextView.setText(inputStr.toString());
            }
        });

        sixBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                inputStr.append("6");
                inputTextView.setText(inputStr.toString());
            }
        });

        sevenBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                inputStr.append("7");
                inputTextView.setText(inputStr.toString());
            }
        });

        eightBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                inputStr.append("8");
                inputTextView.setText(inputStr.toString());
            }
        });

        nineBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                inputStr.append("9");
                inputTextView.setText(inputStr.toString());
            }
        });
    }
}