我想在我的計算器中添加點

Question

我想添加一個點或想在我的計算器屏幕中寫入浮點值。 幫我整理一下。

case R.id.btnCancel: 
    op1 = 0; 
    op2 = 0; 
    op3 = 0; 
    op4 = 0; 
    Display.setText(""); 
break; 
//here is my dot click listner help me to insert it. 
//point object is basically my dot button in UI interface. 
case R.id.btnPoint: 
    if(op4 != 0) { 
     op4 = 0; 
     Display.setText(""); 
    } 
    string = string.append(point.getText()); 
    Display.setText(string); 
break; 

就像那個按鈕我想存儲點按鈕，請幫助我。

case R.id.btn1; 
    if(op4 != 0){ 
    op4 = 0; 
    Display.settext("") 
    } 
    string = string.append(one.gettext()); 
    Display.settext(string); 

Answer 1

case R.id.btnPoint: 

    private boolean dotPresent; 
    String ButtonText = ((Button)v).getText().toString(); 
    boolean IsDot = ButtonText.equals("."); 
    if(IsDot && dotPresent) 
     return; 
    Display.setText(Display.getText().toString() + ButtonText); 
    if (IsDot) 
     dotPresent = false; 

    break;