无法在android calclulator中捕获并添加数字 [英] Unable to caught and add number in android calclulator
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问题描述
您好我是Android开发的新手，只是检查我的技能所以我开始制作一个简单的计算器我已经完成了.xml但未能从按钮中捕获值并添加它们左右。
这是我的代码
Hello I am new to android development and just checking my skills so i starting making a simple calculator i have completed its .xml but failed to caught values from button and add them or so.
Here's my Code
package com.example.decen_000.myapplication;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.text.Editable;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
public class MainActivity extends ActionBarActivity {
int a,b,result;
char ch;
String s;
Button a1, a2, a3, a4, a5, a6, a7, a8, a9, add, sub, mul, div, c, eq;
EditText show;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
result=0;
a1 = (Button) findViewById(R.id.a1);
a2 = (Button) findViewById(R.id.a2);
a3 = (Button) findViewById(R.id.a3);
a4 = (Button) findViewById(R.id.a4);
a5 = (Button) findViewById(R.id.a5);
a6 = (Button) findViewById(R.id.a6);
a7 = (Button) findViewById(R.id.a7);
a8 = (Button) findViewById(R.id.a8);
a9 = (Button) findViewById(R.id.a9);
show = (EditText) findViewById(R.id.display);
add = (Button) findViewById(R.id.plus);
sub = (Button) findViewById(R.id.sub);
div = (Button) findViewById(R.id.div);
mul = (Button) findViewById(R.id.mul);
eq = (Button) findViewById(R.id.equals);
c = (Button) findViewById(R.id.c);
a1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v)
{
show.append("1");
}
});
a2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v)
{
show.append("2");
}
});
a3.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v)
{
}
});
a4.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
}
});
a5.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
}
});
a6.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
}
});
a7.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
}
});
a8.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
}
});
a9.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
}
});
add.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v)
{
a=Integer.parseInt(show.getText().toString());
b=Integer.parseInt(show.getText().toString());
show.setText(""+(a+b));
}
});
sub.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
ch = '-';
}
});
mul.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
ch = '*';
}
});
div.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
ch = '/';
enter code here
}
});
c.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v)
{
}
});
eq.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
switch (ch)
{
case '+':
result = result + a;
show.setText(result);
break;
case '-':
// xx=a-b;
//show.setText(" " + xx);
break;
case '*':
// xx=a*b;
//show.setText(" " + xx);
break;
case '/':
// xx=a/b;
//show.setText(" " + xx);
break;
}
}
});
}
推荐答案
我认为你的方向错了。看一些会让你清楚的样本：
Android开发简介：TouchCalculator [ ^ ]
创建一个简单的计算器 [ ^ ]
Android点击按钮的计算器 [ ^ ]
I think you are going on a wrong way.See some samples that will clear you:
Introduction to Android development : TouchCalculator[^]
Creating a simple calculator[^]
Android calculator with button click[^]
这篇关于无法在android calclulator中捕获并添加数字的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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