设计一个安卓计算器，实现基本加减乘除，开方，平方，倒数运算，阶乘运算，求任意底的对数运算，任意数的N次方运算，正弦，余弦，正切，余切运算等功能

好的，下面是一个简单的安卓计算器的实现代码，包括基本的加减乘除、开方、平方、倒数、阶乘、对数、幂、正弦、余弦、正切和余切等运算： ```java import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.TextView; import androidx.appcompat.app.AppCompatActivity; public class MainActivity extends AppCompatActivity implements View.OnClickListener { private TextView display; private Button btn0, btn1, btn2, btn3, btn4, btn5, btn6, btn7, btn8, btn9; private Button btnAdd, btnSub, btnMul, btnDiv, btnEqu, btnDot, btnClr; private Button btnSqrt, btnSqr, btnRec, btnFac, btnLog, btnPow, btnSin, btnCos, btnTan, btnCot; private double num1, num2, result; private String operator; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); 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); btnAdd = findViewById(R.id.btnAdd); btnSub = findViewById(R.id.btnSub); btnMul = findViewById(R.id.btnMul); btnDiv = findViewById(R.id.btnDiv); btnEqu = findViewById(R.id.btnEqu); btnDot = findViewById(R.id.btnDot); btnClr = findViewById(R.id.btnClr); btnSqrt = findViewById(R.id.btnSqrt); btnSqr = findViewById(R.id.btnSqr); btnRec = findViewById(R.id.btnRec); btnFac = findViewById(R.id.btnFac); btnLog = findViewById(R.id.btnLog); btnPow = findViewById(R.id.btnPow); btnSin = findViewById(R.id.btnSin); btnCos = findViewById(R.id.btnCos); btnTan = findViewById(R.id.btnTan); btnCot = findViewById(R.id.btnCot); 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); btnAdd.setOnClickListener(this); btnSub.setOnClickListener(this); btnMul.setOnClickListener(this); btnDiv.setOnClickListener(this); btnEqu.setOnClickListener(this); btnDot.setOnClickListener(this); btnClr.setOnClickListener(this); btnSqrt.setOnClickListener(this); btnSqr.setOnClickListener(this); btnRec.setOnClickListener(this); btnFac.setOnClickListener(this); btnLog.setOnClickListener(this); btnPow.setOnClickListener(this); btnSin.setOnClickListener(this); btnCos.setOnClickListener(this); btnTan.setOnClickListener(this); btnCot.setOnClickListener(this); } @Override public void onClick(View v) { String str = display.getText().toString(); switch (v.getId()) { case R.id.btn0: display.setText(str + "0"); break; case R.id.btn1: display.setText(str + "1"); break; case R.id.btn2: display.setText(str + "2"); break; case R.id.btn3: display.setText(str + "3"); break; case R.id.btn4: display.setText(str + "4"); break; case R.id.btn5: display.setText(str + "5"); break; case R.id.btn6: display.setText(str + "6"); break; case R.id.btn7: display.setText(str + "7"); break; case R.id.btn8: display.setText(str + "8"); break; case R.id.btn9: display.setText(str + "9"); break; case R.id.btnAdd: num1 = Double.parseDouble(str); operator = "+"; display.setText(""); break; case R.id.btnSub: num1 = Double.parseDouble(str); operator = "-"; display.setText(""); break; case R.id.btnMul: num1 = Double.parseDouble(str); operator = "*"; display.setText(""); break; case R.id.btnDiv: num1 = Double.parseDouble(str); operator = "/"; display.setText(""); break; case R.id.btnEqu: num2 = Double.parseDouble(str); switch (operator) { case "+": result = num1 + num2; break; case "-": result = num1 - num2; break; case "*": result = num1 * num2; break; case "/": result = num1 / num2; break; } display.setText(String.valueOf(result)); break; case R.id.btnDot: if (!str.contains(".")) { display.setText(str + "."); } break; case R.id.btnClr: display.setText(""); break; case R.id.btnSqrt: num1 = Double.parseDouble(str); result = Math.sqrt(num1); display.setText(String.valueOf(result)); break; case R.id.btnSqr: num1 = Double.parseDouble(str); result = num1 * num1; display.setText(String.valueOf(result)); break; case R.id.btnRec: num1 = Double.parseDouble(str); result = 1 / num1; display.setText(String.valueOf(result)); break; case R.id.btnFac: num1 = Double.parseDouble(str); result = factorial(num1); display.setText(String.valueOf(result)); break; case R.id.btnLog: num1 = Double.parseDouble(str); result = Math.log10(num1); display.setText(String.valueOf(result)); break; case R.id.btnPow: num1 = Double.parseDouble(str); operator = "^"; display.setText(""); break; case R.id.btnSin: num1 = Double.parseDouble(str); result = Math.sin(num1); display.setText(String.valueOf(result)); break; case R.id.btnCos: num1 = Double.parseDouble(str); result = Math.cos(num1); display.setText(String.valueOf(result)); break; case R.id.btnTan: num1 = Double.parseDouble(str); result = Math.tan(num1); display.setText(String.valueOf(result)); break; case R.id.btnCot: num1 = Double.parseDouble(str); result = 1 / Math.tan(num1); display.setText(String.valueOf(result)); break; } } private double factorial(double n) { if (n == 0) { return 1; } else { return n * factorial(n - 1); } } } ``` 需要在布局文件中添加对应的控件，并设置相应的ID和属性。上面的代码实现了基本的计算器功能，可以根据需要进行扩展和优化。

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()); } }); } } ```