android计算器
16lz
2021-12-04
MainActivity.java文件
package com.example.calculator;import android.os.Bundle;import android.app.Activity;import android.view.Menu;import android.view.MenuItem;import android.view.View;import android.widget.Button;import android.widget.EditText;import android.support.v4.app.NavUtils;public class MainActivity extends Activity {String str = "";EditText et;int c = 0, flag = 0;double b = 0.0, g = 0.0, f = 0.0;View vi;// 计算方法public double calculater() {switch (c) {case 0:f = g;break;case 1:f = b + g;break;case 2:f = b - g;break;case 3:f = b * g;break;case 4:f = b / g;break;}b = f;c = 0;return f;} @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); // 获得按键final Button number[] = new Button[10];final Button fuhao[] = new Button[11];fuhao[0] = (Button) findViewById(R.id.button01);fuhao[1] = (Button) findViewById(R.id.button02);fuhao[2] = (Button) findViewById(R.id.button03);fuhao[3] = (Button) findViewById(R.id.button04);fuhao[4] = (Button) findViewById(R.id.button05);fuhao[5] = (Button) findViewById(R.id.button06);fuhao[6] = (Button) findViewById(R.id.buttonce);fuhao[7] = (Button) findViewById(R.id.buttonc);fuhao[8] = (Button) findViewById(R.id.zheng);fuhao[9] = (Button) findViewById(R.id.kaifang);fuhao[10] = (Button) findViewById(R.id.pingfang);number[0] = (Button) findViewById(R.id.button0);number[1] = (Button) findViewById(R.id.button1);number[2] = (Button) findViewById(R.id.button2);number[3] = (Button) findViewById(R.id.button3);number[4] = (Button) findViewById(R.id.button4);number[5] = (Button) findViewById(R.id.button5);number[6] = (Button) findViewById(R.id.button6);number[7] = (Button) findViewById(R.id.button7);number[8] = (Button) findViewById(R.id.button8);number[9] = (Button) findViewById(R.id.button9); et = (EditText) findViewById(R.id.textView1);et.setText(str);//shanchufuhao[6].setOnClickListener(new View.OnClickListener() {public void onClick(View v) {str = "";et.setText(str);vi = v;}});//shanfuhao[7].setOnClickListener(new View.OnClickListener() {public void onClick(View v) {str = "";et.setText(str);vi = v;}});// +/-fuhao[8].setOnClickListener(new View.OnClickListener() {public void onClick(View v) {if (vi != fuhao[5] && str != "") {char ch = str.charAt(0);if (ch == '-')str = str.replace("-", "");elsestr = "-" + str;et.setText(str);}}});//kaifangfuhao[9].setOnClickListener(new View.OnClickListener() {public void onClick(View v) {if (str != "") {double a = Double.parseDouble(str);str = Math.sqrt(a) + "";et.setText(str);}}});//pingfangfuhao[10].setOnClickListener(new View.OnClickListener() {public void onClick(View v) {if (str != "") {double a = Double.parseDouble(str);str = "" + a * a;et.setText(str);}}});// 设定数字按键number[0].setOnClickListener(new View.OnClickListener() {public void onClick(View v) {if (flag == 1) {str = "";str += 0;et.setText(str);flag = 0;} else {char ch1[];ch1 = str.toCharArray();if (!(ch1.length == 1 && ch1[0] == '0')) {str += 0;et.setText(str);}}vi = v;}});number[1].setOnClickListener(new View.OnClickListener() {public void onClick(View v) {if (flag == 1) {str = "";str += 1;et.setText(str);flag = 0;} else {str += 1;et.setText(str);}vi = v;}});number[2].setOnClickListener(new View.OnClickListener() {public void onClick(View v) {if (flag == 1) {str = "";str += 2;et.setText(str);flag = 0;} else {str += 2;et.setText(str);}vi = v;}});number[3].setOnClickListener(new View.OnClickListener() {public void onClick(View v) {if (flag == 1) {str = "";str += 3;et.setText(str);flag = 0;} else {str += 3;et.setText(str);}vi = v;}});number[4].setOnClickListener(new View.OnClickListener() {public void onClick(View v) {if (flag == 1) {str = "";str += 4;et.setText(str);flag = 0;} else {str += 4;et.setText(str);}vi = v;}});number[5].setOnClickListener(new View.OnClickListener() {public void onClick(View v) {if (flag == 1) {str = "";str += 5;et.setText(str);flag = 0;} else {str += 5;et.setText(str);}vi = v;}});number[6].setOnClickListener(new View.OnClickListener() {public void onClick(View v) {if (flag == 1) {str = "";str += 6;et.setText(str);flag = 0;} else {str += 6;et.setText(str);}vi = v;}});number[7].setOnClickListener(new View.OnClickListener() {public void onClick(View v) {if (flag == 1) {str = "";str += 7;et.setText(str);flag = 0;} else {str += 7;et.setText(str);}vi = v;}});number[8].setOnClickListener(new View.OnClickListener() {public void onClick(View v) {if (flag == 1) {str = "";str += 8;et.setText(str);flag = 0;} else {str += 8;et.setText(str);}vi = v;}});number[9].setOnClickListener(new View.OnClickListener() {public void onClick(View v) {if (flag == 1) {str = "";str += 9;et.setText(str);flag = 0;} else {str += 9;et.setText(str);}vi = v;}});// 设定符号键// 加fuhao[0].setOnClickListener(new View.OnClickListener() {public void onClick(View v) {if (str != "") {if (vi == fuhao[0] || vi == fuhao[1] || vi == fuhao[2]|| vi == fuhao[3]) {c = 1;}else {g = Double.parseDouble(str);calculater();str = "" + f;et.setText(str);c = 1;flag = 1;vi = v;}}}});// 减fuhao[1].setOnClickListener(new View.OnClickListener() {public void onClick(View v) {if (str != "") {if (vi == fuhao[0] || vi == fuhao[1] || vi == fuhao[2]|| vi == fuhao[3]) {c = 2;}else {g = Double.parseDouble(str);calculater();str = "" + f;et.setText(str);c = 2;flag = 1;vi = v;}}}});// 乘fuhao[2].setOnClickListener(new View.OnClickListener() {public void onClick(View v) {if (str != "") {if (vi == fuhao[0] || vi == fuhao[1] || vi == fuhao[2]|| vi == fuhao[3]) {c = 3;}else {g = Double.parseDouble(str);calculater();str = "" + f;et.setText(str);c = 3;flag = 1;vi = v;}}}});// 除fuhao[3].setOnClickListener(new View.OnClickListener() {public void onClick(View v) {if (str != "") {if (vi == fuhao[0] || vi == fuhao[1] || vi == fuhao[2]|| vi == fuhao[3]) {c = 4;}else {g = Double.parseDouble(str);calculater();str = "" + f;et.setText(str);c = 4;flag = 1;vi = v;}}}});// 等号fuhao[4].setOnClickListener(new View.OnClickListener() {public void onClick(View v) {if (str != "" && vi != fuhao[0] && vi != fuhao[1]&& vi != fuhao[2] && vi != fuhao[3]) {g = Double.parseDouble(str);calculater();str = "" + f;et.setText(str);flag = 1;vi = v;}}});// 小数点fuhao[5].setOnClickListener(new View.OnClickListener() {public void onClick(View v) {if (str == "") {str += ".";et.setText(str);} else {char ch1[];int x = 0;ch1 = str.toCharArray();for (int i = 0; i < ch1.length; i++){if (ch1[i] == '.')x++;}if (x == 0) {str += ".";et.setText(str);}}}}); } @Override public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.activity_main, menu); menu.add(0, 1, 1, "退出"); return true; }@Overridepublic boolean onOptionsItemSelected(MenuItem item) {if (item.getItemId() == 1) {finish();}return super.onOptionsItemSelected(item);} } main.xml文件
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" ><EditText android:text="TextView" android:id="@+id/textView1"android:textSize="25sp" android:textColor="#000000"android:layout_gravity="center" android:gravity="right"android:cursorVisible="false" android:editable="false"android:layout_height="wrap_content" android:layout_width="fill_parent"android:layout_marginLeft="4dip" android:layout_marginRight="4dip"android:layout_marginTop="4dip" android:layout_weight="1.5"></EditText><TableLayout android:id="@+id/tablelayout"android:layout_width="fill_parent" android:layout_height="wrap_content"android:layout_margin="4dip" android:layout_weight="10"> <LinearLayout android:layout_width="fill_parent"android:layout_height="wrap_content" android:layout_weight="1"> <Button android:layout_width="50dip" android:layout_height="fill_parent"android:layout_weight="1" android:textSize="25sp" android:id="@+id/buttonc"android:text="@string/shan"/> <Button android:layout_width="50dip" android:layout_height="fill_parent"android:layout_weight="1" android:textSize="25sp" android:id="@+id/buttonce"android:text="@string/shanchu"/> </LinearLayout> <TableRow android:id="@+id/row0" android:layout_width="fill_parent"android:layout_height="fill_parent" android:layout_weight="1"> <Button android:layout_width="40dip" android:layout_height="fill_parent"android:layout_weight="1" android:textSize="25sp" android:text="@string/one"android:id="@+id/button1"/> <Button android:layout_width="40dip" android:layout_height="fill_parent"android:layout_weight="1" android:textSize="25sp" android:text="@string/two"android:id="@+id/button2"/> <Button android:layout_width="40dip" android:layout_height="fill_parent"android:layout_weight="1" android:textSize="25sp" android:text="@string/three"android:id="@+id/button3"/> <Button android:layout_width="40dip" android:layout_height="fill_parent"android:layout_weight="1" android:textSize="25sp" android:text="@string/jia"android:id="@+id/button01"/> </TableRow> <TableRow android:id="@+id/row1" android:layout_width="fill_parent"android:layout_height="fill_parent" android:layout_weight="1"> <Button android:layout_width="40dip" android:layout_height="fill_parent"android:layout_weight="1" android:textSize="25sp" android:text="@string/four"android:id="@+id/button4"/> <Button android:layout_width="40dip" android:layout_height="fill_parent"android:layout_weight="1" android:textSize="25sp" android:text="@string/five"android:id="@+id/button5"/> <Button android:layout_width="40dip" android:layout_height="fill_parent"android:layout_weight="1" android:textSize="25sp" android:text="@string/six"android:id="@+id/button6"/> <Button android:layout_width="40dip" android:layout_height="fill_parent"android:layout_weight="1" android:textSize="25sp" android:text="@string/jian"android:id="@+id/button02"/> </TableRow> <TableRow android:id="@+id/row2" android:layout_width="fill_parent"android:layout_height="fill_parent" android:layout_weight="1"> <Button android:layout_width="40dip" android:layout_height="fill_parent"android:layout_weight="1" android:textSize="25sp" android:text="@string/seven"android:id="@+id/button7"/> <Button android:layout_width="40dip" android:layout_height="fill_parent"android:layout_weight="1" android:textSize="25sp" android:text="@string/eight"android:id="@+id/button8"/> <Button android:layout_width="40dip" android:layout_height="fill_parent"android:layout_weight="1" android:textSize="25sp" android:text="@string/nine"android:id="@+id/button9"/> <Button android:layout_width="40dip" android:layout_height="fill_parent"android:layout_weight="1" android:textSize="25sp" android:text="@string/cheng"android:id="@+id/button03"/> </TableRow> <TableRow android:id="@+id/row3" android:layout_width="fill_parent"android:layout_height="fill_parent" android:layout_weight="1"> <Button android:layout_width="40dip" android:layout_height="fill_parent"android:layout_weight="1" android:textSize="25sp" android:text="@string/zero"android:id="@+id/button0"/> <Button android:layout_width="40dip" android:layout_height="fill_parent"android:layout_weight="1" android:textSize="25sp" android:text="@string/dihao"android:id="@+id/button04"/> <Button android:layout_width="40dip" android:layout_height="fill_parent"android:layout_weight="1" android:textSize="25sp" android:text="@string/dengyu"android:id="@+id/button05"/> <Button android:layout_width="40dip" android:layout_height="fill_parent"android:layout_weight="1" android:textSize="25sp" android:text="@string/chu"android:id="@+id/button06"/> </TableRow> <LinearLayout android:id="@+id/tableRow1"android:layout_width="fill_parent" android:layout_height="wrap_content"android:orientation="horizontal" android:layout_weight="1"> <Button android:textSize="25sp" android:layout_height="fill_parent"android:layout_width="50dp" android:layout_weight="1" android:text="@string/zhengfu"android:id="@+id/zheng"/> <Button android:id="@+id/pingfang" android:textSize="25sp"android:layout_height="fill_parent" android:layout_width="50dp"android:layout_weight="1" android:text="@string/ping"/> <Button android:id="@+id/kaifang" android:textSize="25sp"android:layout_height="fill_parent" android:layout_width="50dp"android:layout_weight="1" android:text="@string/kai"/> </LinearLayout> </TableLayout></LinearLayout>
<resources> <string name="app_name">Calculator</string> <string name="hello_world">Hello world!</string> <string name="menu_settings">Settings</string> <string name="title_activity_main">MainActivity</string> <string name="one">1</string> <string name="two">2</string> <string name="three">3</string> <string name="four">4</string> <string name="five">5</string> <string name="six">6</string> <string name="seven">7</string> <string name="eight">8</string> <string name="nine">9</string> <string name="zero">0</string> <string name="jia">+</string> <string name="jian">-</string> <string name="cheng">*</string> <string name="chu">/</string> <string name="dengyu">=</string> <string name="zhengfu">+/-</string> <string name="dihao">.</string> <string name="ping">x²</string> <string name="kai">√x</string> <string name="shanchu">ce</string> <string name="shan">c</string></resources>
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