谁给我看看为啥一按键就闪退
package com.example.calculater;
import android.app.Activity;
import android.os.Bundle;
import android.renderscript.Double4;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
public class calculater extends Activity implements OnClickListener{
private Button bt7;
private Button bt8;
private Button bt9;
private Button bt0;
private Button bt1;
private Button bt2;
private Button bt3;
private Button bt4;
private Button bt5;
private Button bt6;
private Button btadd;
private Button btjian;
private Button btmulticul;
private Button btdivide;
private Button btdel;
private Button btclear;
private Button btequal;
private Button btdian;
private EditText edt;
private boolean cf;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.calculater);
bt7=(Button) findViewById(R.id.bt_7);
bt8=(Button) findViewById(R.id.bt_8);
bt9=(Button) findViewById(R.id.bt_9);
bt4=(Button) findViewById(R.id.bt_4);
bt5=(Button) findViewById(R.id.bt_5);
bt6=(Button) findViewById(R.id.bt_6);
bt1=(Button) findViewById(R.id.bt_1);
bt2=(Button) findViewById(R.id.bt_2);
bt3=(Button) findViewById(R.id.bt_3);
btadd=(Button) findViewById(R.id.bt_add);
btjian=(Button) findViewById(R.id.bt_jian);
btmulticul=(Button) findViewById(R.id.bt_multicul);
btdivide=(Button) findViewById(R.id.bt_divide);
bt0=(Button) findViewById(R.id.bt_0);
btdian=(Button) findViewById(R.id.bt_dian);
btequal=(Button) findViewById(R.id.bt_equal);
btclear=(Button) findViewById(R.id.bt_clear);
btdel=(Button) findViewById(R.id.bt_del);
bt7.setOnClickListener(this);
bt8.setOnClickListener(this);
bt9.setOnClickListener(this);
bt4.setOnClickListener(this);
bt5.setOnClickListener(this);
bt6.setOnClickListener(this);
bt1.setOnClickListener(this);
bt2.setOnClickListener(this);
bt3.setOnClickListener(this);
bt0.setOnClickListener(this);
btclear.setOnClickListener(this);
btdel.setOnClickListener(this);
btadd.setOnClickListener(this);
btjian.setOnClickListener(this);
btmulticul.setOnClickListener(this);
btdivide.setOnClickListener(this);
btdian.setOnClickListener(this);
btequal.setOnClickListener(this);
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
String str=edt.getText().toString();
switch (v.getId()) {
case R.id.bt_0:
case R.id.bt_1:
case R.id.bt_2:
case R.id.bt_3:
case R.id.bt_4:
case R.id.bt_5:
case R.id.bt_6:
case R.id.bt_7:
case R.id.bt_8:
case R.id.bt_9:
case R.id.bt_dian:
if(cf)
{
cf=false;
str="";
edt.setText("");
}
edt.setText(str+((Button)v).getText());
break;
case R.id.bt_add:
case R.id.bt_jian:
case R.id.bt_multicul:
case R.id.bt_divide:
if(cf)
{
cf=false;
str="";
edt.setText("");
}
edt.setText(str+" "+((Button) v).getText()+" ");
break;
case R.id.bt_clear:
cf=false;
str="";
edt.setText("");
break;
case R.id.bt_del:
if(cf)
{
cf=false;
str="";
edt.setText("");
}else if(str!=null&&!str.equals("")){
edt.setText(str.substring(0, str.length()-1));
}
break;
case R.id.bt_equal:
getResult();
break;
}
}
private void getResult()
{
String exp=edt.getText().toString();
if (!exp.equals(" ")&&exp!=null)
{
return;
}
if (exp==null||exp.equals("")) {
return;
}
if(exp.contains(""))
{
return;
}
if(cf){
cf=false;
return;
}
cf=true;
double a=0;
String sp1=exp.substring(0, exp.indexOf(" "));
String op=exp.substring(exp.indexOf(" ")+1,exp.indexOf(" "));
String sp2=exp.substring(exp.indexOf(" ")+3);
if(!sp1.equals("")&&!sp2.equals(""))
{
double d1=Double.parseDouble(sp1);
double d2=Double.parseDouble(sp2);
if(op.equals("+"))
{
a= d1+d2;
}else if (op.equals("-")) {
a=d1-d2;
}else if(op.equals("×"))
{
a=d1*d2;
}else if(op.equals("÷"))
{
if (d2==0) {
a=0;
}else
{
a=d1/d2;
}
}
if (!sp1.contains(".")&&!sp2.contains(".")&&!op.equals("÷")) {
int r=(int) a;
edt.setText(r+"");
}else
{
edt.setText(a+"");
}
}else if (!sp1.equals("")&&sp2.equals("")) {
edt.setText(exp);
}else if(sp1.equals("")&&!sp2.equals(""))
{
double d2=Double.parseDouble(sp2);
if(op.equals("+"))
{
a= 0+d2;
}else if (op.equals("-")) {
a=0-d2;
}else if(op.equals("×"))
{
a=0*d2;
}else if(op.equals("÷"))
{
a=0;
}
if (!sp2.contains(".")) {
int r=(int) a;
edt.setText(r+"");
}else
{
edt.setText(a+"");
}
}else
{
edt.setText("");
}
}
}
