android简单计算器代码

package hua.xing.demo;

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 CalculatordemoActivity extends Activity implements OnClickListener { /** Called when the activity is first created. */

private Button but0 = null;

private Button but1 = null;

private Button but2 = null;

private Button but3 = null;

private Button but4 = null;

private Button but5 = null;

private Button but6 = null;

private Button but7 = null;

private Button but8 = null;

private Button but9 = null;

private Button dim = null;

private Button add = null;

private Button sub = null;

private Button mult = null;

private Button div = null;

private Button equ = null;

private EditText etext = null;

private double value = 0;

private String str1 = null;

private String tem = "";

private String sign = "a";

@Override

public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState);

super.setContentView(yout.main);

add = (Button) findViewById(R.id.add);

sub = (Button) findViewById(R.id.sub);

mult = (Button) findViewById(R.id.mult);

div = (Button) findViewById(R.id.divid);

equ = (Button) findViewById(R.id.caculate);

but1 = (Button) findViewById(R.id.but1);

but3 = (Button) findViewById(R.id.but3);

but2 = (Button) findViewById(R.id.but2);

but4 = (Button) findViewById(R.id.but4);

but5 = (Button) findViewById(R.id.but5);

but6 = (Button) findViewById(R.id.but6);

but7 = (Button) findViewById(R.id.but7);

but8 = (Button) findViewById(R.id.but8);

but9 = (Button) findViewById(R.id.but9);

but0 = (Button) findViewById(R.id.but0);

dim = (Button) findViewById(R.id.dim);

etext = (EditText) findViewById(R.id.etext);

add.setOnClickListener(new AListener());

sub.setOnClickListener(new AListener());

mult.setOnClickListener(new AListener());

div.setOnClickListener(new AListener());

equ.setOnClickListener(new Listener());

but1.setOnClickListener(this);

but3.setOnClickListener(this);

but2.setOnClickListener(this);

but4.setOnClickListener(this);

but5.setOnClickListener(this);

but6.setOnClickListener(this);

but7.setOnClickListener(this);

but8.setOnClickListener(this);

but9.setOnClickListener(this);

but0.setOnClickListener(this);

dim.setOnClickListener(this);

}

@Override

public void onClick(View v) {

// TODO Auto-generated method stub

if (v.equals(but1)) {

tem = tem + "1";

etext.setText(tem);

}

if (v.equals(but2)) {

tem = tem + "2";

etext.setText(tem);

}

if (v.equals(but3)) {

tem = tem + "3";

etext.setText(tem);