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CalculatorApp
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src/新M(3).txt
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package net.micode.myapplication;
import androidx.appcompat.app.AppCompatActivity;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import java.text.DecimalFormat;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends AppCompatActivity {
private TextView display;
private TextView historyDisplay;
private String currentInput = "";
private String previousInput = "";
private String operation = "";
private boolean isNewCalculation = false;
private String lastResult = "";
private boolean hasOperation = false;
// 新增错误状态标记
private boolean hasError = false;
private DecimalFormat decimalFormat = new DecimalFormat("#.##########");
private List<String> historyList = new ArrayList<>();
private SharedPreferences preferences;
private static final String PREF_THEME = "theme_preference";
private static final int THEME_LIGHT = 0;
private static final int THEME_DARK = 1;
private int currentTheme;
@Override
protected void onCreate(Bundle savedInstanceState) {
preferences = getSharedPreferences("CalculatorPrefs", MODE_PRIVATE);
currentTheme = preferences.getInt(PREF_THEME, THEME_LIGHT);
setTheme(currentTheme == THEME_DARK ? R.style.DarkTheme : R.style.LightTheme);
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
display = findViewById(R.id.display);
historyDisplay = findViewById(R.id.history_display);
if (savedInstanceState != null) {
historyList = savedInstanceState.getStringArrayList("history");
lastResult = savedInstanceState.getString("lastResult", "");
hasOperation = savedInstanceState.getBoolean("hasOperation", false);
hasError = savedInstanceState.getBoolean("hasError", false);
updateDisplay(); // 错误状态需要恢复显示
}
setupNumberButton(R.id.btn_0, "0");
setupNumberButton(R.id.btn_1, "1");
setupNumberButton(R.id.btn_2, "2");
setupNumberButton(R.id.btn_3, "3");
setupNumberButton(R.id.btn_4, "4");
setupNumberButton(R.id.btn_5, "5");
setupNumberButton(R.id.btn_6, "6");
setupNumberButton(R.id.btn_7, "7");
setupNumberButton(R.id.btn_8, "8");
setupNumberButton(R.id.btn_9, "9");
setupNumberButton(R.id.btn_dot, ".");
setupOperationButton(R.id.btn_add, "+");
setupOperationButton(R.id.btn_subtract, "-");
setupOperationButton(R.id.btn_multiply, "*");
setupOperationButton(R.id.btn_divide, "/");
setupScientificButton(R.id.btn_sin, "sin");
setupScientificButton(R.id.btn_cos, "cos");
setupScientificButton(R.id.btn_tan, "tan");
setupScientificButton(R.id.btn_square, "x²");
setupScientificButton(R.id.btn_sqrt, "√");
findViewById(R.id.btn_equals).setOnClickListener(v -> calculateResult());
findViewById(R.id.btn_clear).setOnClickListener(v -> clearAll());
findViewById(R.id.btn_percent).setOnClickListener(v -> calculatePercentage());
findViewById(R.id.btn_plus_minus).setOnClickListener(v -> changeSign());
findViewById(R.id.btn_history).setOnClickListener(v -> showHistory());
findViewById(R.id.btn_theme).setOnClickListener(v -> switchTheme());
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putStringArrayList("history", new ArrayList<>(historyList));
outState.putString("lastResult", lastResult);
outState.putBoolean("hasOperation", hasOperation);
outState.putBoolean("hasError", hasError);
}
private void setupNumberButton(int buttonId, String number) {
Button button = findViewById(buttonId);
button.setOnClickListener(v -> {
// 错误状态下输入数字，清除错误并开始新计算
if (hasError) {
clearAll();
hasError = false;
}
if (hasOperation && isNewCalculation && !lastResult.isEmpty()) {
currentInput = lastResult;
isNewCalculation = false;
hasOperation = false;
} else if (isNewCalculation && !lastResult.isEmpty()) {
currentInput = lastResult;
isNewCalculation = false;
}
if (number.equals(".") && currentInput.contains(".")) return;
if (currentInput.equals("0") && !number.equals(".")) {
currentInput = number;
} else {
currentInput += number;
}
updateDisplay();
});
}
private void setupOperationButton(int buttonId, String op) {
Button button = findViewById(buttonId);
button.setOnClickListener(v -> {
// 错误状态下输入操作符，清除错误并开始新计算
if (hasError) {
clearAll();
hasError = false;
}
if (!currentInput.isEmpty() || !lastResult.isEmpty()) {
String input = currentInput;
if (currentInput.isEmpty() && !lastResult.isEmpty()) {
input = lastResult;
}
if (!previousInput.isEmpty() && !operation.isEmpty() && !isNewCalculation) {
calculateResult();
// 若上次计算有错误，不更新操作符
if (hasError) return;
previousInput = lastResult;
currentInput = "";
operation = op;
hasOperation = true;
updateDisplay();
return;
}
previousInput = input;
currentInput = "";
operation = op;
hasOperation = true;
isNewCalculation = false;
updateDisplay();
}
});
}
private void setupScientificButton(int buttonId, String func) {
Button button = findViewById(buttonId);
button.setOnClickListener(v -> {
// 错误状态下输入科学计算按钮，清除错误并开始新计算
if (hasError) {
clearAll();
hasError = false;
}
String input = currentInput;
if (isNewCalculation && !lastResult.isEmpty()) {
input = lastResult;
isNewCalculation = false;
}
if (!input.isEmpty()) {
double value = Double.parseDouble(input);
double result = 0;
boolean errorOccurred = false;
switch (func) {
case "sin":
result = Math.sin(Math.toRadians(value));
break;
case "cos":
result = Math.cos(Math.toRadians(value));
break;
case "tan":
result = Math.tan(Math.toRadians(value));
break;
case "x²":
result = value * value;
break;
case "√":
if (value < 0) {
display.setText("Error");
hasError = true;
errorOccurred = true;
} else {
result = Math.sqrt(value);
}
break;
}
if (!errorOccurred) {
currentInput = decimalFormat.format(result);
lastResult = currentInput;
hasOperation = false;
updateDisplay();
}
}
});
}
private void calculateResult() {
if (hasError) return; // 错误状态下不执行计算
if (previousInput.isEmpty() || (currentInput.isEmpty() && lastResult.isEmpty()) || operation.isEmpty()) return;
double prev = Double.parseDouble(previousInput);
double current = currentInput.isEmpty() ? Double.parseDouble(lastResult) : Double.parseDouble(currentInput);
double result = 0;
boolean errorOccurred = false;
// 除零错误处理核心逻辑
if (operation.equals("/") && current == 0) {
display.setText("不能除以0");
hasError = true;
errorOccurred = true;
} else {
switch (operation) {
case "+":
result = prev + current;
break;
case "-":
result = prev - current;
break;
case "*":
result = prev * current;
break;
case "/":
result = prev / current;
break;
}
}
if (!errorOccurred) {
String historyItem = previousInput + " " + operation + " " +
(currentInput.isEmpty() ? lastResult : currentInput) + " = " + result;
historyList.add(historyItem);
updateHistoryDisplay();
currentInput = decimalFormat.format(result);
lastResult = currentInput;
previousInput = "";
operation = "";
isNewCalculation = true;
hasOperation = false;
updateDisplay();
}
}
private void clearAll() {
currentInput = "";
previousInput = "";
operation = "";
lastResult = "";
isNewCalculation = false;
hasOperation = false;
hasError = false; // 清除错误状态
updateDisplay();
}
private void calculatePercentage() {
if (hasError) {
clearAll();
hasError = false;
}
String input = currentInput;
if (isNewCalculation && !lastResult.isEmpty()) {
input = lastResult;
isNewCalculation = false;
}
if (!input.isEmpty()) {
double value = Double.parseDouble(input) / 100;
currentInput = decimalFormat.format(value);
lastResult = currentInput;
hasOperation = false;
updateDisplay();
} else if (!previousInput.isEmpty()) {
double value = Double.parseDouble(previousInput) / 100;
previousInput = decimalFormat.format(value);
updateDisplay();
}
}
private void changeSign() {
if (hasError) {
clearAll();
hasError = false;
}
String input = currentInput;
if (isNewCalculation && !lastResult.isEmpty()) {
input = lastResult;
isNewCalculation = false;
}
if (!input.isEmpty()) {
double value = Double.parseDouble(input);
value = -value;
currentInput = decimalFormat.format(value);
lastResult = currentInput;
hasOperation = false;
updateDisplay();
}
}
private void updateDisplay() {
if (hasError) {
display.setText("Error");
return;
}
StringBuilder displayText = new StringBuilder();
if (!previousInput.isEmpty()) {
displayText.append(previousInput).append(" ");
if (!operation.isEmpty()) {
displayText.append(operation).append(" ");
}
}
if (!currentInput.isEmpty()) {
displayText.append(currentInput);
}
display.setText(displayText.toString());
}
private void updateHistoryDisplay() {
StringBuilder historyText = new StringBuilder();
for (int i = historyList.size() - 1; i >= 0; i--) {
historyText.append(historyList.get(i)).append("\n");
}
historyDisplay.setText(historyText.toString());
}
private void showHistory() {
updateHistoryDisplay();
}
private void switchTheme() {
currentTheme = (currentTheme == THEME_LIGHT) ? THEME_DARK : THEME_LIGHT;
preferences.edit().putInt(PREF_THEME, currentTheme).apply();
recreate();
}
}

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src/新a(3).txt
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<?xml version="1.0" encoding="utf-8"?>
<GridLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:columnCount="4"
android:rowCount="8"
android:padding="10dp">
<!-- 历史记录显示区域 -->
<TextView
android:id="@+id/history_display"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_columnSpan="4"
android:layout_marginBottom="5dp"
android:background="@android:color/white"
android:gravity="end|top"
android:minLines="2"
android:padding="5dp"
android:textSize="16sp"
android:textColor="@android:color/darker_gray"/>
<!-- 显示区域 -->
<EditText
android:id="@+id/display"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_columnSpan="4"
android:layout_marginBottom="10dp"
android:background="@android:color/darker_gray"
android:gravity="end|bottom"
android:minLines="2"
android:padding="10dp"
android:textSize="32sp"
android:editable="false"
android:cursorVisible="false"/>
<!-- 新增历史记录和主题按钮 -->
<Button
android:id="@+id/btn_history"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="历史"
android:textSize="24sp"/>
<Button
android:id="@+id/btn_theme"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="主题"
android:textSize="24sp"/>
<Button
android:id="@+id/btn_percent"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="%"
android:textSize="24sp"/>
<Button
android:id="@+id/btn_divide"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="/"
android:textSize="24sp"/>
<!-- 科学计算按钮 -->
<Button
android:id="@+id/btn_sin"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="sin"
android:textSize="24sp"/>
<Button
android:id="@+id/btn_cos"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="cos"
android:textSize="24sp"/>
<Button
android:id="@+id/btn_tan"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="tan"
android:textSize="24sp"/>
<Button
android:id="@+id/btn_clear"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="C"
android:textSize="24sp"/>
<Button
android:id="@+id/btn_7"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="7"
android:textSize="24sp"/>
<Button
android:id="@+id/btn_8"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="8"
android:textSize="24sp"/>
<Button
android:id="@+id/btn_9"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="9"
android:textSize="24sp"/>
<Button
android:id="@+id/btn_multiply"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="*"
android:textSize="24sp"/>
<Button
android:id="@+id/btn_4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="4"
android:textSize="24sp"/>
<Button
android:id="@+id/btn_5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="5"
android:textSize="24sp"/>
<Button
android:id="@+id/btn_6"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="6"
android:textSize="24sp"/>
<Button
android:id="@+id/btn_subtract"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="-"
android:textSize="24sp"/>
<Button
android:id="@+id/btn_1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="1"
android:textSize="24sp"/>
<Button
android:id="@+id/btn_2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="2"
android:textSize="24sp"/>
<Button
android:id="@+id/btn_3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="3"
android:textSize="24sp"/>
<Button
android:id="@+id/btn_add"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="+"
android:textSize="24sp"/>
<Button
android:id="@+id/btn_plus_minus"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="+/-"
android:textSize="24sp"/>
<Button
android:id="@+id/btn_0"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_columnSpan="2"
android:text="0"
android:textSize="24sp"/>
<Button
android:id="@+id/btn_dot"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="."
android:textSize="24sp"/>
<Button
android:id="@+id/btn_equals"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="="
android:textSize="24sp"/>
<!-- 更多科学计算按钮 -->
<Button
android:id="@+id/btn_square"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="x²"
android:textSize="24sp"/>
<Button
android:id="@+id/btn_sqrt"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="√"
android:textSize="24sp"/>
</GridLayout>

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src/新color(3).txt
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<resources>
<color name="primary">#008577</color>
<color name="primary_dark">#00574B</color>
<color name="accent">#D81B60</color>
</resources>

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src/新styles(3).txt
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<resources>
<!-- 基础主题 -->
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
<item name="colorPrimary">@color/primary</item>
<item name="colorPrimaryDark">@color/primary_dark</item>
<item name="colorAccent">@color/accent</item>
</style>
<!-- 浅色主题 -->
<style name="LightTheme" parent="AppTheme">
<item name="android:background">@android:color/white</item>
<item name="android:textColor">@android:color/black</item>
</style>
<!-- 深色主题 -->
<style name="DarkTheme" parent="AppTheme">
<item name="android:background">@android:color/darker_gray</item>
<item name="android:textColor">@android:color/white</item>
</style>
</resources>
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