SuiShenJi项目_计算器逻辑

<pre name="code" class="html">private Boolean isclicked = false；

case R.id.btn_number_9:

if (isclicked) {
add_read_number.setText(null);
isclicked = false;
}
add_read_number.setText(add_read_number.getText().toString().trim()
+ "9");
break;

case R.id.btn_number_0:

add_read_number.setText(add_read_number.getText().toString().trim()
+ "0");
break；

case R.id.btn_number_dian: （小数点）

if (add_read_number.getText().toString().equals("")
|| add_read_number.getText().toString().equals(null)) {
return;
} else {

if (add_read_number.getText().toString().contains(".")) {
return;
} else {
add_read_number.setText(add_read_number.getText()
.toString().trim()
+ ".");
}
}
break;
case R.id.btn_number_del:  (删除)

if (add_read_number.getText().toString().equals("")
|| add_read_number.getText().toString().equals(null)) {
return;
}
add_read_number.setText(add_read_number
.getText()
.toString()
.trim()
.substring(
0,
add_read_number.getText().toString().trim()
.length() - 1));
break;

case R.id.btn_number_jia: （加法）

if (add_read_number.getText().toString().trim().equals(null)) {
return;
}
in1 = Double.parseDouble(add_read_number.getText().toString()
.trim());
add_read_number.setText(null);
isclicked = false;

break;

case R.id.btn_number_ok: （等于）

if (add_read_number.getText().toString().equals("")
|| add_read_number.getText().toString().equals(null)) {
return;
}
in2 = Double.valueOf(add_read_number.getText().toString().trim());

Double dou = in1 + in2;

add_read_number.setText(dou.toString());
isclicked = true;
in1 = 0.0;
in2 = 0.0;