equal点击后没反应。弄了一天了。求大神帮忙。
package com.example.calculator_1;
import javax.security.auth.PrivateCredentialPermission;
import android.R.string;
import android.support.v7.app.ActionBarActivity;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
public class MainActivity<Sting> extends Activity implements OnClickListener{
Button bt_0;
Button bt_1;
Button bt_2;
Button bt_3;
Button bt_4;
Button bt_5;
Button bt_6;
Button bt_7;
Button bt_8;
Button bt_9;
Button bt_point;
Button bt_add;
Button bt_clear;
Button bt_del;
Button bt_multip;
Button bt_division;
Button bt_equal;
Button bt_reduce;
EditText et_input;
boolean clear_flag;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
bt_0 = (Button) findViewById(R.id.bt_0);
bt_1 = (Button) findViewById(R.id.bt_1);
bt_2 = (Button) findViewById(R.id.bt_2);
bt_3 = (Button) findViewById(R.id.bt_3);
bt_4 = (Button) findViewById(R.id.bt_4);
bt_5 = (Button) findViewById(R.id.bt_5);
bt_6 = (Button) findViewById(R.id.bt_6);
bt_7 = (Button) findViewById(R.id.bt_7);
bt_8 = (Button) findViewById(R.id.bt_8);
bt_9 = (Button) findViewById(R.id.bt_9);
bt_point = (Button) findViewById(R.id.bt_point);
bt_add = (Button) findViewById(R.id.bt_add);
bt_clear = (Button) findViewById(R.id.bt_clear);
bt_del = (Button) findViewById(R.id.bt_del);
bt_multip = (Button) findViewById(R.id.bt_multip);
bt_division = (Button) findViewById(R.id.bt_division);
bt_equal = (Button) findViewById(R.id.bt_equal);
bt_reduce = (Button) findViewById(R.id.bt_reduce);
et_input=(EditText) findViewById(R.id.et1);
bt_0.setOnClickListener(this);
bt_1.setOnClickListener(this);
bt_2.setOnClickListener(this);
bt_3.setOnClickListener(this);
bt_4.setOnClickListener(this);
bt_5.setOnClickListener(this);
bt_6.setOnClickListener(this);
bt_7.setOnClickListener(this);
bt_8.setOnClickListener(this);
bt_9.setOnClickListener(this);
bt_point.setOnClickListener(this);
bt_add.setOnClickListener(this);
bt_clear.setOnClickListener(this);
bt_multip.setOnClickListener(this);
bt_division.setOnClickListener(this);
bt_equal.setOnClickListener(this);
bt_reduce.setOnClickListener(this);
bt_del.setOnClickListener(this);
et_input.setOnClickListener(this);
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
String str = (String) et_input.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_point:
if (clear_flag) {
clear_flag = false;
str = "";
et_input.setText("");
}
et_input.setText(str+((Button)v).getText());
break;
case R.id.bt_add:
case R.id.bt_reduce:
case R.id.bt_multip:
case R.id.bt_division:
et_input.setText(str+""+((Button)v).getText()+"");
break;
case R.id.bt_clear:
clear_flag = false;
str = "";
et_input.setText("");
break;
case R.id.bt_del:
if (clear_flag) {
clear_flag = false;
str = "";
et_input.setText("");
}else
if (str!=null&&!str.equals("")) {
et_input.setText(str.substring(0, str.length()-1));
}
break;
case R.id.bt_equal:
getResult();
break;
}
}
private void getResult(){
clear_flag = true;
String exp = et_input.getText().toString();
if (exp==null||exp.equals("")) {
return;
}
if (!exp.contains("")) {
return;
}
if (clear_flag) {
clear_flag = false;
return;
}
clear_flag = false;
double result = 0;
String s1 = exp.substring(0,exp.indexOf(""));
String op = exp.substring(exp.indexOf("")+1,exp.indexOf("")+2);
String s2 = exp.substring(exp.indexOf("")+3);
if (!s1.equals("")&&!s2.equals("")) {
double d1 = Double.parseDouble(s1);
double d2 = Double.parseDouble(s2);
if (op.equals("+")) {
result = d1+d2;
}
else if (op.equals("-")) {
result = d1-d2;
}
else if (op.equals("x")) {
result = d1*d2;
}
else if (op.equals("/")) {
if (d2==0) {
result = 0;
}
else {
result = d1/d2;
}
}
if (!s1.contains(".")&&!s2.contains(".")&&!op.equals("/")) {
int r = (int) result;
et_input.setText(r+"");
}else {
et_input.setText(result+"");
} if (!s1.equals("")&&s2.equals("")) {
et_input.setText(exp);
}
if (s1.equals("")&&!s2.equals("")) {
double d3 = Double.parseDouble(s2);
if (op.equals("+")) {
result = 0+d3;
}
else if (op.equals("-")) {
result = 0-d3;
}
else if (op.equals("x")) {
result = 0;
}
else if (op.equals("/")) {
result = 0;
if (!s2.contains(".")) {
int r = (int) result;
et_input.setText(r+"");
}else {
et_input.setText(result+"");
}
if(s1.contains("")&&s2.contains("")){
et_input.setText("");
}
}
}
}
}
}
