finish!

2019-12-21 22:52:07 +08:00
commit 00ae62ce9d
45 changed files with 1565 additions and 0 deletions
--- a/app/.gitignore
+++ b/app/.gitignore
@@ -0,0 +1 @@
+/build
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -0,0 +1,28 @@
+apply plugin: 'com.android.application'
+
+android {
+    compileSdkVersion 29
+    defaultConfig {
+        applicationId "wang.xice.mycalculator"
+        minSdkVersion 16
+        targetSdkVersion 29
+        versionCode 1
+        versionName "1.0"
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+    }
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        }
+    }
+}
+
+dependencies {
+    implementation fileTree(dir: 'libs', include: ['*.jar'])
+    implementation 'androidx.appcompat:appcompat:1.0.2'
+    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
+    testImplementation 'junit:junit:4.12'
+    androidTestImplementation 'androidx.test:runner:1.1.1'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.1'
+}
--- a/app/proguard-rules.pro
+++ b/app/proguard-rules.pro
@@ -0,0 +1,21 @@
+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile
--- a/app/src/androidTest/java/wang/xice/mycalculator/ExampleInstrumentedTest.java
+++ b/app/src/androidTest/java/wang/xice/mycalculator/ExampleInstrumentedTest.java
@@ -0,0 +1,27 @@
+package wang.xice.mycalculator;
+
+import android.content.Context;
+
+import androidx.test.platform.app.InstrumentationRegistry;
+import androidx.test.runner.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import static org.junit.Assert.assertEquals;
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
+ */
+@RunWith(AndroidJUnit4.class)
+public class ExampleInstrumentedTest {
+    @Test
+    public void useAppContext() {
+        // Context of the app under test.
+        Context appContext = InstrumentationRegistry.getInstrumentation().getTargetContext();
+
+        assertEquals("wang.xice.mycalculator", appContext.getPackageName());
+    }
+}
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="wang.xice.mycalculator">
+
+    <application
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/AppTheme">
+        <activity android:name=".MainActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>
--- a/app/src/main/java/wang/xice/mycalculator/Calculator.java
+++ b/app/src/main/java/wang/xice/mycalculator/Calculator.java
@@ -0,0 +1,258 @@
+package wang.xice.mycalculator;
+
+import java.util.ArrayList;
+import java.util.Stack;
+
+/**
+ * 计算输入的表达式
+ */
+public class Calculator {
+
+    public static String calculate(String downStr) throws Exception {
+        ArrayList<String> inOrderList = getStringList(downStr);
+        ArrayList<String> postOrderList = getPostOrderList(inOrderList);
+        double result = calPostOrderList(postOrderList);
+        if (result == Math.floor(result)) {
+            return (long) result + "";
+        }
+        return result + "";
+    }
+
+    /**
+     * 将字符串放入栈中 --- 中序表达式
+     * 按照 数字 符号 这种中序的顺序存入栈中
+     *
+     * @return ArrayList<String> 中缀表达式
+     */
+    private static ArrayList<String> getStringList(String string) {
+
+        ArrayList<String> arrayList = new ArrayList<>();
+        String num = "";
+        String str = "";
+
+        for (int i = 0; i < string.length(); i++) {
+
+            if ((Character.isDigit(string.charAt(i))
+                    || string.charAt(i) == '.'
+                    || string.charAt(i) == 'e'
+                    || string.charAt(i) == 'π')) {
+                // 当前的字符串是否是数字或者是点号
+                num += string.charAt(i);
+            }else if(Character.isLetter(string.charAt(i))){
+                str += string.charAt(i);
+            } else {// 当前输入的字符不是数字或者点号
+
+                if (i == 0 && isSubOperator(string.charAt(i) + "")) {
+                    // 当最后一次计算结果为负数时候，
+                    //为输入的String第一位添加0 保证再次做减法的正确性
+                    arrayList.add("0");
+                }
+                if (!str.equals("")) {
+                    arrayList.add(str);
+                }
+                if (!num.equals("")) {
+                    arrayList.add(num);
+                }
+                arrayList.add(string.charAt(i) + "");
+                str = "";
+                num = "";
+            }
+        }
+
+        if (!str.equals("")) {// 添加最后一个一元运算符
+            arrayList.add(str);
+        }
+        if (!num.equals("")) {// 添加最后一个数字
+            arrayList.add(num);
+        }
+
+        return arrayList;
+    }
+
+    /**
+     * 把中缀表达式转化成后缀表达式
+     *
+     * @param inOrderList ArrayList<String> 中缀表达式
+     * @return ArrayList<String> 后缀表达式
+     */
+    private static ArrayList<String> getPostOrderList(ArrayList<String> inOrderList) {
+
+        ArrayList<String> postOrderList = new ArrayList<>();
+        Stack<String> operatorStack = new Stack<>();
+
+        for (int i = 0; i < inOrderList.size(); i++) {
+
+            String current = inOrderList.get(i);
+            if (current.equals("(")){// 如果是左括号
+                operatorStack.push(current); //直接入栈
+            }
+            else if (current.equals(")")){ //如果是右括号
+                while (!operatorStack.isEmpty() && !operatorStack.peek().equals("(")){ //将栈中的运算符全入栈 知道找到左括号
+                    postOrderList.add(operatorStack.pop());
+                }
+                if (!operatorStack.isEmpty()) operatorStack.pop(); // 并将左括号出栈
+            }else if (isOperator(current)) {// 如果是运算符
+                while (!operatorStack.isEmpty() && compareLevel(operatorStack.peek(), current)) { // 判断优先级 进行入栈
+                    postOrderList.add(operatorStack.pop());
+                }
+                operatorStack.push(current);
+            } else {// 如果不是运算符, 是数字或者是点号
+                postOrderList.add(inOrderList.get(i));
+            }
+        }
+
+        while (!operatorStack.isEmpty()) {
+            postOrderList.add(operatorStack.pop());
+        }
+
+        return postOrderList;
+    }
+
+    /**
+     * 比较运算符之间的优先级
+     * 比较当前运算符与运算符栈顶的运算符的优先级
+     * 若栈顶元算符优先级大于当前元算符则出栈，把运算符栈顶元素放入
+     * 后缀表达式栈中
+     * ---
+     * 若栈顶元算符优先级大于或等于当前元算符返回true
+     *
+     * @param stackTop String 栈顶运算符
+     * @param current String 当前运算符
+     * @return boolean 是否优先
+     */
+    private static boolean compareLevel(String stackTop, String current) {
+        if (isOperator(stackTop) && !isSubOperator(stackTop)){ // sin cos啥的
+            return true;
+        }
+        if (isOperator(current) && !isSubOperator(current)){
+            return false;
+        }
+        if (stackTop.equals("*") && (current.equals("*")
+                || current.equals("/")
+                || current.equals("+")
+                || current.equals("-"))) {
+            return true;
+        }
+
+        if (stackTop.equals("/") && (current.equals("*")
+                || current.equals("/")
+                || current.equals("+")
+                || current.equals("-"))) {
+            return true;
+        }
+
+        if (stackTop.equals("+") && (current.equals("+")
+                || current.equals("-"))) {
+            return true;
+        }
+
+        if (stackTop.equals("-") && (current.equals("-")
+                || current.equals("+"))) {
+            return true;
+        }
+
+        return false;
+    }
+
+    /**
+     * 判断是否是运算符
+     *
+     * @return boolean 是否是运算符
+     */
+    private static boolean isOperator(String string) {
+        return string.equals("+")
+                || string.equals("-")
+                || string.equals("*")
+                || string.equals("/")
+                || string.equals("sin")
+                || string.equals("cos")
+                || string.equals("log")
+                || string.equals("tan");
+    }
+    /**
+     * 判断运算符前面是否应该有数
+     *
+     * @return boolean 是否是二元运算符
+     * */
+    private static boolean isSubOperator(String string) {
+        return string.equals("+")
+                || string.equals("-")
+                || string.equals("*")
+                || string.equals("/");
+    }
+
+    /**
+     * 将含有e π 的字符串转成对应的数
+     *
+     * @return double 转化之后的数字
+     * */
+    private static double strToDouble(String s) {
+        switch (s){
+            case "e":
+                return Math.E;
+            case "π":
+                return Math.PI;
+            default:
+                return Double.parseDouble(s);
+        }
+    }
+
+    /**
+     * 计算后缀表达式
+     * 如果是数字或者点号直接存入到堆栈中，遇到运算符则弹出栈顶的两个元素
+     * 然后计算得到结果之后在存入栈中
+     */
+    private static double calPostOrderList(ArrayList<String> postOrderList) throws Exception {
+
+        Stack<String> stack = new Stack<>();
+        for (int i = 0; i < postOrderList.size(); i++) {
+
+            String curStr = postOrderList.get(i);
+            if (isSubOperator(curStr)) {// 二元运算符 弹出栈顶的两个元素,然后进行计算,注意a是被操作数先弹出的a
+                double a = strToDouble(stack.pop());
+                double b = strToDouble(stack.pop());
+                double result = 0.0;
+                switch (curStr.charAt(0)) {
+                    case '+':
+                        result = b + a;
+                        break;
+                    case '-':
+                        result = b - a;
+                        break;
+                    case '/':
+                        if (a == 0) throw new Exception();
+                        result = b / a;
+                        break;
+                    case '*':
+                        result = b * a;
+                        break;
+                }
+
+                stack.push(result + "");
+            }else if (isOperator(curStr)){ // 一元运算符仅需要弹出一个元素进行计算
+                double a = strToDouble(stack.pop());
+                double result = 0.0;
+                switch (curStr) {
+                    case "sin":
+                        result = Math.sin(a);
+                        break;
+                    case "cos":
+                        result = Math.cos(a);
+                        break;
+                    case "tan":
+                        result = Math.tan(a);
+                        break;
+                    case "log":
+                        result = Math.log(a);
+                        break;
+                }
+
+                stack.push(result + "");
+            } else {
+                stack.push(curStr);
+            }
+        }
+
+        return Double.parseDouble(stack.pop());
+    }
+}
--- a/app/src/main/java/wang/xice/mycalculator/MainActivity.java
+++ b/app/src/main/java/wang/xice/mycalculator/MainActivity.java
@@ -0,0 +1,177 @@
+package wang.xice.mycalculator;
+
+import android.content.Context;
+import android.os.Bundle;
+import android.util.Log;
+import android.view.View;
+import android.view.WindowManager;
+import android.view.animation.AlphaAnimation;
+import android.view.animation.Animation;
+import android.view.animation.AnimationSet;
+import android.view.animation.TranslateAnimation;
+import android.widget.Button;
+import android.widget.EditText;
+import android.widget.LinearLayout;
+
+import androidx.appcompat.app.AppCompatActivity;
+
+import java.util.ArrayList;
+
+public class MainActivity extends AppCompatActivity {
+
+
+    private static final String TAG = "MainActivity";
+    private String downStr = "";
+    private boolean last_input = false;// 上一次输入是否为等号
+
+    private ArrayList<Button> mButtons;
+    private EditText downText;// 显示计算的结果
+    private EditText upText;// 显示计算的式子
+    private LinearLayout keyboardLayout;
+    private LinearLayout displayLayout;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_main);
+        bindLayoutID();
+        setListener();
+        setButtonsStyle();
+
+        if (savedInstanceState != null) {
+            upText.setText(savedInstanceState.getString("upText"));
+            downText.setText(savedInstanceState.getString("downText"));
+        }
+    }
+
+    // 活动被回收时，保存临时数据
+    @Override
+    protected void onSaveInstanceState(Bundle outState) {
+        super.onSaveInstanceState(outState);
+        outState.putString("upText", upText.getText().toString());
+        outState.putString("downText", downText.getText().toString());
+    }
+
+    private void setButtonsStyle() {
+        WindowManager wm = (WindowManager) this.getSystemService(Context.WINDOW_SERVICE);
+        int screen_height = wm.getDefaultDisplay().getHeight();
+
+        keyboardLayout.getLayoutParams().height = screen_height / 2;
+        displayLayout.getLayoutParams().height = screen_height / 3;
+
+        for (int i = 0; i < mButtons.size(); i++) {
+            mButtons.get(i).setWidth(keyboardLayout.getWidth() / 4);
+            mButtons.get(i).setHeight(keyboardLayout.getHeight() / 5);
+            Log.d(TAG, "setButtonsStyle: " + mButtons.get(i).getWidth());
+            Log.d(TAG, "setButtonsStyle: " + mButtons.get(i).getHeight());
+        }
+
+        mButtons.get(0).setWidth( keyboardLayout.getWidth() / 2);
+    }
+
+    private void setListener() {
+        // 初始化数字按键等直接添加字符的按钮的点击监听事件
+        for (int i = 0; i < mButtons.size()-3; i++) {
+            final int index = i;
+            mButtons.get(i).setOnClickListener(new View.OnClickListener() {
+                @Override
+                public void onClick(View view) {
+                    if (last_input) {// 如果上一次输入的是等号，则再按数字键表示计算新的式子
+                        downStr = "";
+                        last_input = false;
+                    }
+                    downStr += mButtons.get(index).getText();
+                    downText.setText(downStr);
+                    downText.setSelection(downStr.length());
+                }
+            });
+        }
+        // 清除
+        mButtons.get(mButtons.size()-2).setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                downStr = "";
+                downText.setText("0");
+                upText.setText("");
+                last_input = false;
+            }
+        });
+
+        // 退格
+        mButtons.get(mButtons.size()-1).setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                if (downStr.length() == 0) {
+                    return;
+                }
+                downStr = downStr.substring(0, downStr.length() - 1);
+                downText.setText(downStr);
+                downText.setSelection(downStr.length());
+                last_input = false;
+            }
+        });
+        // 等号
+        mButtons.get(mButtons.size()-3).setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                if (last_input) {// 若上一次输入的是等号，则不做任何操作
+                    return;
+                }
+
+                // 小动画
+                AnimationSet animationSet = new AnimationSet(true);
+                AlphaAnimation alphaAnimation = new AlphaAnimation(1f, 0f);
+                alphaAnimation.setDuration(200);
+                TranslateAnimation translateAnimation = new TranslateAnimation(0, 0, 0, -150f);
+                translateAnimation.setDuration(200);
+                animationSet.addAnimation(alphaAnimation);
+                animationSet.addAnimation(translateAnimation);
+                downText.startAnimation(animationSet);
+                animationSet.setAnimationListener(new Animation.AnimationListener() {
+                    @Override
+                    public void onAnimationStart(Animation animation) {
+
+                    }
+
+                    @Override
+                    public void onAnimationEnd(Animation animation) {
+                        // 在上面的editText显示计算表达式
+                        upText.setText(downStr + "=");
+                        upText.setSelection(downStr.length() + 1);
+                        try {
+                            downStr = Calculator.calculate(downStr);
+                            downText.setText(downStr);
+                            downText.setSelection(downStr.length());
+                        } catch (Exception e) {
+                            downText.setText("算式错误");
+                            downStr = "";
+                        }
+                    }
+
+                    @Override
+                    public void onAnimationRepeat(Animation animation) {
+
+                    }
+                });
+
+                last_input = true;
+            }
+        });
+    }
+
+    private void bindLayoutID(){
+        int[] mButtonsId = {R.id.num_0, R.id.num_1, R.id.num_2, R.id.num_3,
+                R.id.num_4, R.id.num_5, R.id.num_6, R.id.num_7,
+                R.id.num_8, R.id.num_9, //10
+                R.id.num_dot, R.id.sum, R.id.sub, R.id.multi,
+                R.id.divider,R.id.bracket_left,R.id.bracket_right,R.id.num_e,
+                R.id.num_pi,R.id.cos,R.id.sin,R.id.tan,R.id.log,
+                R.id.equl, R.id.clear, R.id.delete};
+        mButtons = new ArrayList<>();
+        for (int mButtonId: mButtonsId) mButtons.add((Button) findViewById(mButtonId));
+        upText = findViewById(R.id.editText1);
+        downText = findViewById(R.id.editText2);
+        keyboardLayout = findViewById(R.id.keyboard_area);
+        displayLayout = findViewById(R.id.layout_display);
+    }
+}
--- a/app/src/main/res/drawable-v24/ic_launcher_foreground.xml
+++ b/app/src/main/res/drawable-v24/ic_launcher_foreground.xml
@@ -0,0 +1,34 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:aapt="http://schemas.android.com/aapt"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <path
+        android:fillType="evenOdd"
+        android:pathData="M32,64C32,64 38.39,52.99 44.13,50.95C51.37,48.37 70.14,49.57 70.14,49.57L108.26,87.69L108,109.01L75.97,107.97L32,64Z"
+        android:strokeWidth="1"
+        android:strokeColor="#00000000">
+        <aapt:attr name="android:fillColor">
+            <gradient
+                android:endX="78.5885"
+                android:endY="90.9159"
+                android:startX="48.7653"
+                android:startY="61.0927"
+                android:type="linear">
+                <item
+                    android:color="#44000000"
+                    android:offset="0.0" />
+                <item
+                    android:color="#00000000"
+                    android:offset="1.0" />
+            </gradient>
+        </aapt:attr>
+    </path>
+    <path
+        android:fillColor="#FFFFFF"
+        android:fillType="nonZero"
+        android:pathData="M66.94,46.02L66.94,46.02C72.44,50.07 76,56.61 76,64L32,64C32,56.61 35.56,50.11 40.98,46.06L36.18,41.19C35.45,40.45 35.45,39.3 36.18,38.56C36.91,37.81 38.05,37.81 38.78,38.56L44.25,44.05C47.18,42.57 50.48,41.71 54,41.71C57.48,41.71 60.78,42.57 63.68,44.05L69.11,38.56C69.84,37.81 70.98,37.81 71.71,38.56C72.44,39.3 72.44,40.45 71.71,41.19L66.94,46.02ZM62.94,56.92C64.08,56.92 65,56.01 65,54.88C65,53.76 64.08,52.85 62.94,52.85C61.8,52.85 60.88,53.76 60.88,54.88C60.88,56.01 61.8,56.92 62.94,56.92ZM45.06,56.92C46.2,56.92 47.13,56.01 47.13,54.88C47.13,53.76 46.2,52.85 45.06,52.85C43.92,52.85 43,53.76 43,54.88C43,56.01 43.92,56.92 45.06,56.92Z"
+        android:strokeWidth="1"
+        android:strokeColor="#00000000" />
+</vector>
--- a/app/src/main/res/drawable/caculator_button_background.xml
+++ b/app/src/main/res/drawable/caculator_button_background.xml
@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:state_pressed="false"
+        android:drawable="@drawable/caculator_button_normal"  ></item>
+</selector>
--- a/app/src/main/res/drawable/caculator_button_normal.xml
+++ b/app/src/main/res/drawable/caculator_button_normal.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android">
+    <solid android:color="@color/colorCaculatorButton"></solid>
+    <stroke android:color="@color/colorc7c7c7"
+        android:width="@dimen/keyboard_divide_line"></stroke>
+</shape>
--- a/app/src/main/res/drawable/ic_launcher_background.xml
+++ b/app/src/main/res/drawable/ic_launcher_background.xml
@@ -0,0 +1,170 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <path
+        android:fillColor="#008577"
+        android:pathData="M0,0h108v108h-108z" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M9,0L9,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,0L19,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M29,0L29,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M39,0L39,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M49,0L49,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M59,0L59,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M69,0L69,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M79,0L79,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M89,0L89,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M99,0L99,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,9L108,9"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,19L108,19"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,29L108,29"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,39L108,39"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,49L108,49"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,59L108,59"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,69L108,69"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,79L108,79"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,89L108,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,99L108,99"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,29L89,29"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,39L89,39"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,49L89,49"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,59L89,59"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,69L89,69"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,79L89,79"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M29,19L29,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M39,19L39,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M49,19L49,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M59,19L59,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M69,19L69,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M79,19L79,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+</vector>
--- a/app/src/main/res/drawable/keyboard_background.xml
+++ b/app/src/main/res/drawable/keyboard_background.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="@drawable/keyboard_normal"
+        android:state_pressed="false">
+    </item>
+</selector>
--- a/app/src/main/res/drawable/keyboard_normal.xml
+++ b/app/src/main/res/drawable/keyboard_normal.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android">
+    <solid android:color="@color/colorF1F1F1"></solid>
+    <stroke android:color="@color/colorc7c7c7"
+        android:width="@dimen/keyboard_divide_line"></stroke>
+</shape>
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -0,0 +1,58 @@
+<?xml version="1.0" encoding="utf-8"?>
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/activity_main"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="@color/colorWhite">
+
+    <LinearLayout
+        android:id="@+id/layout_display"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="30dp"
+        android:background="@color/colorWhite"
+        android:orientation="vertical"
+        android:paddingLeft="@dimen/editText_padding"
+        android:paddingRight="@dimen/editText_padding">
+
+        <EditText
+            android:id="@+id/editText1"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:background="@null"
+            android:cursorVisible="false"
+            android:gravity="right|center_vertical"
+            android:text=""
+            android:textColor="@color/colorc7c7c7"
+            android:textSize="@dimen/editNormal"/>
+
+        <EditText
+            android:id="@+id/editText2"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="10dp"
+            android:background="@null"
+            android:cursorVisible="false"
+            android:focusableInTouchMode="false"
+            android:gravity="right|center_vertical"
+            android:singleLine="true"
+            android:text="0"
+            android:textAppearance="?android:attr/textAppearanceMedium"
+            android:textColor="@color/colorBlack"
+            android:textSize="@dimen/editBig"/>
+    </LinearLayout>
+
+    <LinearLayout
+        android:id="@+id/keyboard_area"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="vertical"
+        android:layout_gravity="bottom"
+        android:gravity="bottom">
+
+        <include
+            layout="@layout/keyboard"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"/>
+    </LinearLayout>
+</FrameLayout>
--- a/app/src/main/res/layout/keyboard.xml
+++ b/app/src/main/res/layout/keyboard.xml
@@ -0,0 +1,188 @@
+<?xml version="1.0" encoding="utf-8"?>
+<TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:stretchColumns="*">
+
+    <TableRow>
+        <Button
+            android:id="@+id/bracket_left"
+            android:background="@drawable/caculator_button_background"
+            android:text="("
+            android:textColor="@color/colorWhite" />
+        <Button
+            android:id="@+id/bracket_right"
+            android:background="@drawable/caculator_button_background"
+            android:text=")"
+            android:textColor="@color/colorWhite" />
+        <Button
+            android:id="@+id/sin"
+            android:background="@drawable/caculator_button_background"
+            android:text="sin"
+            android:textAllCaps="false"
+            android:textColor="@color/colorWhite" />
+        <Button
+            android:id="@+id/cos"
+            android:background="@drawable/caculator_button_background"
+            android:text="cos"
+            android:textAllCaps="false"
+            android:textColor="@color/colorWhite" />
+    </TableRow>
+    <TableRow>
+        <Button
+            android:id="@+id/clear"
+            android:background="@drawable/keyboard_background"
+            android:text="C"
+            android:textColor="@color/colorClear" />
+
+        <Button
+            android:id="@+id/delete"
+            android:background="@drawable/keyboard_background"
+            android:text="←"
+            android:textColor="@color/colorNum" />
+        <Button
+            android:id="@+id/tan"
+            android:background="@drawable/caculator_button_background"
+            android:text="tan"
+            android:textAllCaps="false"
+            android:textColor="@color/colorWhite" />
+        <Button
+            android:id="@+id/log"
+            android:background="@drawable/caculator_button_background"
+            android:text="log"
+            android:textAllCaps="false"
+            android:textColor="@color/colorWhite" />
+    </TableRow>
+    <TableRow>
+
+        <Button
+            android:id="@+id/num_e"
+            android:background="@drawable/keyboard_background"
+            android:text="e"
+            android:textAllCaps="false"
+            android:textColor="@color/colorNum" />
+
+        <Button
+            android:id="@+id/num_pi"
+            android:background="@drawable/keyboard_background"
+            android:text="π"
+            android:textAllCaps="false"
+            android:textColor="@color/colorNum" />
+
+        <Button
+            android:id="@+id/remainder"
+            android:background="@drawable/caculator_button_background"
+            android:text="%"
+            android:textColor="@color/colorWhite" />
+
+        <Button
+            android:id="@+id/divider"
+            android:background="@drawable/caculator_button_background"
+            android:text="/"
+            android:textColor="@color/colorWhite" />
+    </TableRow>
+
+    <TableRow>
+
+        <Button
+            android:id="@+id/num_7"
+            android:background="@drawable/keyboard_background"
+            android:text="7"
+            android:textColor="@color/colorNum" />
+
+        <Button
+            android:id="@+id/num_8"
+            android:background="@drawable/keyboard_background"
+            android:text="8"
+            android:textColor="@color/colorNum" />
+
+        <Button
+            android:id="@+id/num_9"
+            android:background="@drawable/keyboard_normal"
+            android:text="9"
+            android:textColor="@color/colorNum" />
+
+        <Button
+            android:id="@+id/multi"
+            android:background="@drawable/caculator_button_background"
+            android:text="*"
+            android:textColor="@color/colorWhite" />
+    </TableRow>
+
+    <TableRow>
+
+        <Button
+            android:id="@+id/num_4"
+            android:background="@drawable/keyboard_background"
+            android:text="4"
+            android:textColor="@color/colorNum" />
+
+        <Button
+            android:id="@+id/num_5"
+            android:background="@drawable/keyboard_background"
+            android:text="5"
+            android:textColor="@color/colorNum" />
+
+        <Button
+            android:id="@+id/num_6"
+            android:background="@drawable/keyboard_normal"
+            android:text="6"
+            android:textColor="@color/colorNum" />
+
+        <Button
+            android:id="@+id/sub"
+            android:background="@drawable/caculator_button_background"
+            android:text="-"
+            android:textColor="@color/colorWhite" />
+    </TableRow>
+
+    <TableRow>
+
+        <Button
+            android:id="@+id/num_1"
+            android:background="@drawable/keyboard_background"
+            android:text="1"
+            android:textColor="@color/colorNum" />
+
+        <Button
+            android:id="@+id/num_2"
+            android:background="@drawable/keyboard_background"
+            android:text="2"
+            android:textColor="@color/colorNum" />
+
+        <Button
+            android:id="@+id/num_3"
+            android:background="@drawable/keyboard_normal"
+            android:text="3"
+            android:textColor="@color/colorNum" />
+
+        <Button
+            android:id="@+id/sum"
+            android:background="@drawable/caculator_button_background"
+            android:text="+"
+            android:textColor="@color/colorWhite" />
+    </TableRow>
+
+    <TableRow>
+
+        <Button
+            android:id="@+id/num_0"
+            android:layout_span="2"
+            android:background="@drawable/keyboard_background"
+            android:text="0"
+            android:textColor="@color/colorNum" />
+
+        <Button
+            android:id="@+id/num_dot"
+            android:background="@drawable/keyboard_background"
+            android:text="."
+            android:textColor="@color/colorNum" />
+
+        <Button
+            android:id="@+id/equl"
+            android:background="@drawable/keyboard_normal"
+            android:text="="
+            android:textColor="@color/colorNum" />
+    </TableRow>
+
+</TableLayout>
--- a/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml
+++ b/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml
@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>
--- a/app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml
+++ b/app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml
@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>
--- a/app/src/main/res/mipmap-hdpi/ic_launcher.png
+++ b/app/src/main/res/mipmap-hdpi/ic_launcher.png
--- a/app/src/main/res/mipmap-hdpi/ic_launcher_round.png
+++ b/app/src/main/res/mipmap-hdpi/ic_launcher_round.png
--- a/app/src/main/res/mipmap-mdpi/ic_launcher.png
+++ b/app/src/main/res/mipmap-mdpi/ic_launcher.png
--- a/app/src/main/res/mipmap-mdpi/ic_launcher_round.png
+++ b/app/src/main/res/mipmap-mdpi/ic_launcher_round.png
--- a/app/src/main/res/mipmap-xhdpi/ic_launcher.png
+++ b/app/src/main/res/mipmap-xhdpi/ic_launcher.png
--- a/app/src/main/res/mipmap-xhdpi/ic_launcher_round.png
+++ b/app/src/main/res/mipmap-xhdpi/ic_launcher_round.png
--- a/app/src/main/res/mipmap-xxhdpi/ic_launcher.png
+++ b/app/src/main/res/mipmap-xxhdpi/ic_launcher.png
--- a/app/src/main/res/mipmap-xxhdpi/ic_launcher_round.png
+++ b/app/src/main/res/mipmap-xxhdpi/ic_launcher_round.png
--- a/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png
+++ b/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png
--- a/app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.png
+++ b/app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.png
--- a/app/src/main/res/values/colors.xml
+++ b/app/src/main/res/values/colors.xml
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="colorPrimary">#008577</color>
+    <color name="colorPrimaryDark">#00574B</color>
+    <color name="colorAccent">#D81B60</color>
+    <color name="colorWhite">#ffffff</color>
+    <color name="colorF1F1F1">#f1f1f1</color>
+    <color name="colorc7c7c7">#c7c7c7</color>
+    <color name="colorClear">#96D16C</color>
+    <color name="colorNum">#6e6e6e</color>
+    <color name="colorCaculatorButton">#ffb9d796</color>
+    <color name="colorBlack">#000000</color>
+</resources>
--- a/app/src/main/res/values/dimens.xml
+++ b/app/src/main/res/values/dimens.xml
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <dimen name="keyboard_divide_line">0.1dp</dimen>
+    <dimen name="editText_padding">16dp</dimen>
+    <dimen name="editNormal">30sp</dimen>
+    <dimen name="editBig">50sp</dimen>
+</resources>
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -0,0 +1,3 @@
+<resources>
+    <string name="app_name">MyCalculator</string>
+</resources>
--- a/app/src/main/res/values/styles.xml
+++ b/app/src/main/res/values/styles.xml
@@ -0,0 +1,11 @@
+<resources>
+
+    <!-- Base application theme. -->
+    <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
+        <!-- Customize your theme here. -->
+        <item name="colorPrimary">@color/colorPrimary</item>
+        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
+        <item name="colorAccent">@color/colorAccent</item>
+    </style>
+
+</resources>
--- a/app/src/test/java/wang/xice/mycalculator/CalculatorUnitTest.java
+++ b/app/src/test/java/wang/xice/mycalculator/CalculatorUnitTest.java
@@ -0,0 +1,20 @@
+package wang.xice.mycalculator;
+
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.fail;
+
+public class CalculatorUnitTest {
+    @Test
+    public void testCalculator() {
+        String str = "cosπ+loge";
+        try {
+            String calculate = Calculator.calculate(str);
+            assertEquals("0",calculate);
+        } catch (Exception e) {
+            e.printStackTrace();
+            fail();
+        }
+    }
+}
--- a/app/src/test/java/wang/xice/mycalculator/ExampleUnitTest.java
+++ b/app/src/test/java/wang/xice/mycalculator/ExampleUnitTest.java
@@ -0,0 +1,17 @@
+package wang.xice.mycalculator;
+
+import org.junit.Test;
+
+import static org.junit.Assert.*;
+
+/**
+ * Example local unit test, which will execute on the development machine (host).
+ *
+ * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
+ */
+public class ExampleUnitTest {
+    @Test
+    public void addition_isCorrect() {
+        assertEquals(4, 2 + 2);
+    }
+}