复制代码 代码如下:
<?xml version="1.0" encoding="utf-8"?>
<EditText
android:id="@+id/editText1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10" >

<requestFocus />
</EditText>

<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="1" />

<Button
android:id="@+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="2" />

<Button
android:id="@+id/button3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="+" />

<Button
android:id="@+id/button4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="=" />

复制代码 代码如下:
package com.action;

import android.R.integer;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;

public class jspActivity extends Activity{
private Button bt1;
private Button bt2;
private Button btadd;
private Button bteql;

private EditText et;

private int a;
private int b;

private String stra="";
private String fh;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.jsp);
bt1=(Button) findViewById(R.id.button1);
bt2=(Button) findViewById(R.id.button2);
btadd=(Button) findViewById(R.id.button3);
bteql=(Button) findViewById(R.id.button4);

et=(EditText) findViewById(R.id.editText1);
bt1.setOnClickListener(new sum());
bt2.setOnClickListener(new sum());
btadd.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
a=Integer.parseInt(et.getText().toString()) ;
et.setText("");
stra="";
fh=btadd.getText().toString();
}
});
bteql.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
b=Integer.parseInt(et.getText().toString()) ;
et.setText("");
stra="";
if(fh.equals("+"))
{
int c=a+b;
et.setText(""+c);
}
}
});
}
public class sum implements OnClickListener{

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
switch (v.getId()) {
case R.id.button1:
stra+=bt1.getText();
et.setText(stra);
break;
case R.id.button2:
stra+=bt2.getText();
et.setText(stra);
break;

default:
break;
}
}
}
}