android:id="@+id/sub"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="1"
android:text="-"
android:textSize="12pt"/>
Java源代码
package https://www.360docs.net/doc/ed14054260.html,youtclss;
import java.util.Date;
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 MainActivity extends Activity { private Button one;
private Button two;
private Button three;
private Button four;
private Button five;
private Button six;
private Button seven;
private Button eight;
private Button nine;
private Button zero;
private Button dot;
private Button add;
private Button sub;
private Button mult;
private Button division;
private Button amount;
private Button clear;
private Button time;
private Button sqrt;
private Button pow;
private EditText led;
String num1 = "";
String num2 = "";
double num3 = 0;
String rezult = "";
String sign = null;
int mark = 0;
boolean flag = true;
boolean dotmark = true;
protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState);
setContentView(https://www.360docs.net/doc/ed14054260.html,yout.main);
zero = (Button) findViewById(R.id.zero);
one = (Button) findViewById(R.id.one);
two = (Button) findViewById(R.id.two);
three = (Button) findViewById(R.id.three);
four = (Button) findViewById(R.id.four);
five = (Button) findViewById(R.id.five);
six = (Button) findViewById(R.id.six);
seven = (Button) findViewById(R.id.seven);
eight = (Button) findViewById(R.id.eight);
nine = (Button) findViewById(R.id.nine);
dot = (Button) findViewById(R.id.dot);
add = (Button) findViewById(R.id.add);
sub = (Button) findViewById(R.id.sub);
mult = (Button) findViewById(R.id.mult);
division = (Button) findViewById(R.id.division); clear = (Button) findViewById(R.id.clear); amount = (Button) findViewById(R.id.amount); time = (Button) findViewById(R.id.time);
pow = (Button) findViewById(R.id.pow);
sqrt = (Button) findViewById(R.id.sqrt);
led = (EditText) findViewById(R.id.led);
zero.setOnClickListener(new OnClickListener() { public void onClick(View v) {
if (mark == 0) {
num1 = num1 + "0";
led.setText(num1);
} else if (mark == 1) {
num2 = num2 + "0";
led.setText(num1 + sign + num2);
} else {
num1 = String.valueOf(num3);
num2 = num2 + "0";
led.setText(num1 + sign + num2);
}
}
});
one.setOnClickListener(new OnClickListener() { public void onClick(View v) {
if (mark == 0) {
num1 = num1 + "1";
led.setText(num1);
} else if (mark == 1) {
num2 = num2 + "1";
led.setText(num1 + sign + num2);
} else {
num1 = String.valueOf(num3);
num2 = num2 + "1";
led.setText(num1 + sign + num2);
}
}
});
two.setOnClickListener(new OnClickListener() { public void onClick(View v) {
if (mark == 0) {
num1 = num1 + "2";
led.setText(num1);
} else if (mark == 1) {
num2 = num2 + "2";
led.setText(num1 + sign + num2);
} else {
num1 = String.valueOf(num3);
num2 = num2 + "2";
led.setText(num1 + sign + num2);
}
}
});
three.setOnClickListener(new OnClickListener() { public void onClick(View v) {
if (mark == 0) {
num1 = num1 + "3";
led.setText(num1);
} else if (mark == 1) {
num2 = num2 + "3";
led.setText(num1 + sign + num2);
} else {
num1 = String.valueOf(num3);
num2 = num2 + "3";
led.setText(num1 + sign + num2);
}
}
});
four.setOnClickListener(new OnClickListener() { public void onClick(View v) {
if (mark == 0) {
num1 = num1 + "4";
led.setText(num1);
} else if (mark == 1) {
num2 = num2 + "4";
led.setText(num1 + sign + num2);
} else {
num1 = String.valueOf(num3);
num2 = num2 + "4";
led.setText(num1 + sign + num2);
}
}
});
five.setOnClickListener(new OnClickListener() { public void onClick(View v) {
if (mark == 0) {
num1 = num1 + "5";
led.setText(num1);
} else if (mark == 1) {
num2 = num2 + "5";
led.setText(num1 + sign + num2);
} else {
num1 = String.valueOf(num3);
num2 = num2 + "5";
led.setText(num1 + sign + num2);
}
}
});
six.setOnClickListener(new OnClickListener() { public void onClick(View v) {
if (mark == 0) {
num1 = num1 + "6";
led.setText(num1);
} else if (mark == 1) {
num2 = num2 + "6";
led.setText(num1 + sign + num2);
} else {
num1 = String.valueOf(num3);
num2 = num2 + "6";
led.setText(num1 + sign + num2);
}
}
});
seven.setOnClickListener(new OnClickListener() { public void onClick(View v) {
if (mark == 0) {
num1 = num1 + "7";
led.setText(num1);
} else if (mark == 1) {
num2 = num2 + "7";
led.setText(num1 + sign + num2);
} else {
num1 = String.valueOf(num3);
num2 = num2 + "7";
led.setText(num1 + sign + num2);
}
}
});
eight.setOnClickListener(new OnClickListener() { public void onClick(View v) {
if (mark == 0) {
num1 = num1 + "8";
led.setText(num1);
} else if (mark == 1) {
num2 = num2 + "8";
led.setText(num1 + sign + num2);
} else {
num1 = String.valueOf(num3);
num2 = num2 + "8";
led.setText(num1 + sign + num2);
}
}
});
nine.setOnClickListener(new OnClickListener() { public void onClick(View v) {
if (mark == 0) {
num1 = num1 + "9";
led.setText(num1);
} else if (mark == 1) {
num2 = num2 + "9";
led.setText(num1 + sign + num2);
} else {
num1 = String.valueOf(num3);
num2 = num2 + "9";
led.setText(num1 + sign + num2);
}
}
});
add.setOnClickListener(new OnClickListener() { public void onClick(View v) {
if (flag) {
sign = "+";
mark++;
flag = false;
dotmark = true;
}
}
});
sub.setOnClickListener(new OnClickListener() { public void onClick(View v) {
if (flag) {
sign = "-";
mark++;
flag = false;
dotmark = true;
}
}
});
mult.setOnClickListener(new OnClickListener() { public void onClick(View v) {
if (flag) {
sign = "*";
mark++;
flag = false;
dotmark = true;
}
}
});
division.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
if (flag) {
sign = "÷";
mark++;
flag = false;
dotmark = true;
}
}
});
pow.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
if (flag) {
sign = "^";
mark++;
flag = false;
dotmark = true;
}
}
});
dot.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
if (dotmark) {
if (mark == 0) {
num1 = num1 + ".";
led.setText(num1);
} else if (mark == 1) {
num2 = num2 + ".";
led.setText(num1 + sign + num2);
} else {
num1 = String.valueOf(num3);
num2 = num2 + ".";
led.setText(num1 + sign + num2);
}
dotmark = false;
}
}
});
amount.setOnClickListener(new OnClickListener() { // 等于时发生的运算
public void onClick(View v) {
flag = true;
dotmark = true;
if (sign.equals("+")) {
double x = Double.parseDouble(num1);
double y = Double.parseDouble(num2);
num3 = x + y;
rezult = String.valueOf(num3);
led.setText(num1 + sign + num2 + "=" + rezult);
num2 = "";
} else if (sign.equals("-")) {
double x = Double.parseDouble(num1);
double y = Double.parseDouble(num2);
num3 = x - y;
rezult = String.valueOf(num3);
led.setText(num1 + sign + num2 + "=" + rezult);
num2 = "";
} else if (sign.equals("*")) {
double x = Double.parseDouble(num1);
double y = Double.parseDouble(num2);
num3 = x * y;
rezult = String.valueOf(num3);
led.setText(num1 + sign + num2 + "=" + rezult);
num2 = "";
} else if (sign.equals("÷")) {
double x = Double.parseDouble(num1);
double y = Double.parseDouble(num2);
num3 = x / y;
rezult = String.valueOf(num3);
led.setText(num1 + sign + num2 +
"=" + rezult);
num2 = "";
} else if (sign.equals("^")) {
double x = Double.parseDouble(num1);
double y = Double.parseDouble(num2);
num3 = Math.pow(x, y);
rezult = String.valueOf(num3);
led.setText(num1 + sign + num2 + "=" + rezult);
num2 = "";
}
}
});
clear.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
num1 = "";
num2 = "";
num3 = 0;
mark = 0;
sign = "";
led.setText("0");
flag = true;
dotmark = true;
}
});
sqrt.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
if (mark == 0 && !num1.equals("") &&
num2.equals("")) {
double parent =
Double.parseDouble(num1);
double root = Math.sqrt(parent);
rezult = String.valueOf(root);
led.setText(rezult);
num1 = "";
}
}
});
time.setOnClickListener(new OnClickListener() { public void onClick(View v) {
Date date = new Date();
led.setText(date.toLocaleString());
}
});
}
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