最容易理解的Android计算器实现
package com.example.Calcuator;
import com.wk.cal.CalAdd;
import com.wk.cal.CalDiv;
import com.wk.cal.CalMul;
import com.wk.cal.CalSub;
import com.wk.cal.Calculator;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
public class MyActivity extends Activity {
TextView mtvText;
Button mbtnAdd, mbtnSub, mbtnMul, mbtnDiv, mbtnResult, mbtnClear, mbtn0,
mbtn1, mbtn2, mbtn3, mbtn4, mbtn5, mbtn6, mbtn7, mbtn8, mbtn9,mbtnExit;
String num1, num2;
String cal_Operator = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
initButton();
AddButtonAction();
}
private void initButton() {
mbtnClear = (Button) findViewById(R.id.btnClear);
mtvText = (TextView) findViewById(R.id.tvResult);
mbtnAdd = (Button) findViewById(R.id.btnAdd);
mbtnSub = (Button) findViewById(R.id.btnSub);
mbtnMul = (Button) findViewById(R.id.btnMul);
mbtnDiv = (Button) findViewById(R.id.btnDiv);
mbtnResult = (Button) findViewById(R.id.btnResult);
mbtnExit = (Button) findViewById(R.id.btnExit);
mbtn0 = (Button) findViewById(R.id.btn0);
mbtn1 = (Button) findViewById(R.id.btn1);
mbtn2 = (Button) findViewById(R.id.btn2);
mbtn3 = (Button) findViewById(R.id.btn3);
mbtn4 = (Button) findViewById(R.id.btn4);
mbtn5 = (Button) findViewById(R.id.btn5);
mbtn6 = (Button) findViewById(R.id.btn6);
mbtn7 = (Button) findViewById(R.id.btn7);
mbtn8 = (Button) findViewById(R.id.btn8);
mbtn9 = (Button) findViewById(R.id.btn9);
}
private void AddButtonAction() {
mbtn0.setOnClickListener(new ButtonActionListener());
mbtn1.setOnClickListener(new ButtonActionListener());
mbtn2.setOnClickListener(new ButtonActionListener());
mbtn3.setOnClickListener(new ButtonActionListener());
mbtn4.setOnClickListener(new ButtonActionListener());
mbtn5.setOnClickListener(new ButtonActionListener());
mbtn6.setOnClickListener(new ButtonActionListener());
mbtn7.setOnClickListener(new ButtonActionListener());
mbtn8.setOnClickListener(new ButtonActionListener());
mbtn9.setOnClickListener(new ButtonActionListener());
mbtnAdd.setOnClickListener(new ButtonActionListener());
mbtnSub.setOnClickListener(new ButtonActionListener());
mbtnMul.setOnClickListener(new ButtonActionListener());
mbtnDiv.setOnClickListener(new ButtonActionListener());
mbtnResult.setOnClickListener(new ButtonActionListener());
mbtnClear.setOnClickListener(new ButtonActionListener());
mbtnExit.setOnClickListener(new ButtonActionListener());
}
class ButtonActionListener implements OnClickListener {
public void btnClearAction(View v) {
if (v.getId() == R.id.btnClear) {
mtvText.setText("");
}
}
public void btnAddAction(View v) {
if (v.getId() == R.id.btnAdd) {
num1 = (String) mtvText.getText();
System.out.println("[num1]"+num1);
mtvText.setText("");
cal_Operator = (String) mbtnAdd.getText();
}
}
public void btnSubAction(View v) {
if (v.getId() == R.id.btnSub) {
num1 = (String) mtvText.getText();
System.out.println("[num1]" + num1);
mtvText.setText("");
cal_Operator = (String) mbtnSub.getText();
}
}
public void btnMulAction(View v) {
if (v.getId() == R.id.btnMul) {
num1 = (String) mtvText.getText();
System.out.println("[num1]"+num1);
mtvText.setText("");
cal_Operator = (String) mbtnMul.getText();
}
}
public void btnDivAction(View v) {
if (v.getId() == R.id.btnDiv) {
num1 = (String) mtvText.getText();
System.out.println("[num1]"+num1);
System.out.println(num1);
mtvText.setText("");
cal_Operator = (String) mbtnDiv.getText();
}
}
public void btn0Action(View v) {
if (v.getId() == R.id.btn0) {
mtvText.setText(mtvText.getText() + "0");
}
}
public void btn1Action(View v) {
if (v.getId() == R.id.btn1) {
mtvText.setText(mtvText.getText() + "1");
}
}
public void btn2Action(View v) {
if (v.getId() == R.id.btn2) {
mtvText.setText(mtvText.getText() + "2");
}
}
public void btn3Action(View v) {
if (v.getId() == R.id.btn3) {
mtvText.setText(mtvText.getText() + "3");
}
}
public void btn4Action(View v) {
if (v.getId() == R.id.btn4) {
mtvText.setText(mtvText.getText() + "4");
}
}
public void btn5Action(View v) {
if (v.getId() == R.id.btn5) {
mtvText.setText(mtvText.getText() + "5");
}
}
public void btn6Action(View v) {
if (v.getId() == R.id.btn6) {
mtvText.setText(mtvText.getText() + "6");
}
}
public void btn7Action(View v) {
if (v.getId() == R.id.btn7) {
mtvText.setText(mtvText.getText() + "7");
}
}
public void btn8Action(View v) {
if (v.getId() == R.id.btn8) {
mtvText.setText(mtvText.getText() + "8");
}
}
public void btn9Action(View v) {
if (v.getId() == R.id.btn9) {
mtvText.setText(mtvText.getText() + "9");
}
}
public void btnResultAction(View v) {
try{
if(v.getId() == R.id.btnResult){
num2 = (String) mtvText.getText();
System.out.println("[num2]"+num2);
mtvText.setText("");
CalFactory factory = new CalFactory();
factory.createCalFactory(cal_Operator);
}
}catch(Exception e){
}
}
public void btnExitAction(View v){
if(v.getId() == R.id.btnExit){
System.exit(0);
}
}
@Override
public void onClick(View v) {
btnExitAction(v);
btnClearAction(v);
btn0Action(v);
btn1Action(v);
btn2Action(v);
btn3Action(v);
btn4Action(v);
btn5Action(v);
btn6Action(v);
btn7Action(v);
btn8Action(v);
btn9Action(v);
btnAddAction(v);
btnSubAction(v);
btnMulAction(v);
btnDivAction(v);
btnResultAction(v);
}
}
class CalFactory {
public void createCalFactory(String cal_Operator) {
Calculator cal = null;
switch (cal_Operator) {
case "+":
cal = new CalAdd();
cal.setNum1(Double.valueOf(num1));
cal.setNum2(Double.valueOf(num2));
System.out.println("[num1]"+cal.getNum1()+"[num2]"+cal.getNum2());
mtvText.setText("加法"+num1+"[参数2]"+num2);
mtvText.setText(String.valueOf(cal.getResult()));
break;
case "―":
cal = new CalSub();
cal.setNum1(Double.valueOf(num1));
cal.setNum2(Double.valueOf(num2));
mtvText.setText(String.valueOf(cal.getResult()));
break;
case "×":
cal = new CalMul();
cal.setNum1(Double.valueOf(num1));
cal.setNum2(Double.valueOf(num2));
mtvText.setText(String.valueOf(cal.getResult()));
break;
case "÷":
cal = new CalDiv();
cal.setNum1(Double.valueOf(num1));
cal.setNum2(Double.valueOf(num2));
mtvText.setText(String.valueOf(cal.getResult()));
break;
}
}
}
}
这个我只上传一个主要的Activity 界面的代码,核心的理念和我的控制台计算器理念是一模一样的..
