Eclipse應用程序刪除按鈕並自動執行程序

Question

您好，我在adroid上有一個應用程序的以下代碼。

在text3（et3）當我們按下按鈕時，它會在text3字段返回一個結果。它就像一個計算器。

我想刪除按鈕，所以程序一直工作，出來按它。

enter code here 
package com.example.b15_calc; 

import android.os.Bundle; 
import android.app.Activity; 
import android.view.Menu; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.widget.Button; 
import android.widget.EditText; 

public class MainActivity extends Activity { 
    EditText et1, et2, et3, et4; 

Button b1, b2; 



@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 

    et1 = (EditText) findViewById(R.id.editText1); 
    et2 = (EditText) findViewById(R.id.editText2); 
    et3 = (EditText) findViewById(R.id.editText3); 
    et4 = (EditText) findViewById(R.id.editText4); 

    b1 = (Button) findViewById(R.id.button1); 
    b2 = (Button) findViewById(R.id.button2); 

      //step3 : write add functionality. 
      b2.setOnClickListener(new OnClickListener() { 

       @Override 
       public void onClick(View v) { 
           et1.setText(""); 
           et2.setText(""); 
           et3.setText(""); 
           et4.setText(""); 


       } 
    }); 

    //step3 : ΜΕΤΑΒΛΗΤΕΣ 
    b1.setOnClickListener(new OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      String f = et1.getText().toString(); 
      double i = Double.parseDouble(f); 
      String s = et2.getText().toString(); 
      double j = Double.parseDouble(s); 
      String w = et4.getText().toString(); 
      double q = Double.parseDouble(w); 
      double price_gold = 10; 
      double fpa = 1.23; 
      double fpol = 0.10; 
      double fpolam = 999; 
      double isot = 100; 
      double sint_ker = 10; 
      double result1 = (i * price_gold) + (j * 1000) + (q * isot); 
      double result2 = result1/340.75; 
      int gap; 

      if (result2 >= fpolam){ 
       double result = (result2 * fpol); 
       double result3 = ((result2 * sint_ker) * fpa) + result; 
       if(result3 < 1000) 
       { 
        gap = 10;  
       } 
       else if(result3 < 5000) 
       { 
        gap = 50; 
       } 
       else //5000+ 
       { 
        gap = 100; 
       } 
       int total = (int) Math.ceil(result3/gap) * gap; 




       String res = String.valueOf(total); 
       et3.setText(res); 
      } else{ 

       double result3 = ((result2 * sint_ker) * fpa); 
       if(result3 < 1000) 
       { 
        gap = 10;  
       } 
       else if(result3 < 5000) 
       { 
        gap = 50; 
       } 
       else //5000+ 
       { 
        gap = 100; 
       } 
       int total = (int) Math.ceil(result3/gap) * gap; 
       String res = String.valueOf(total); 
       et3.setText(res); 
      } 




     } 
    }); 





} 

@Override 
public boolean onCreateOptionsMenu(Menu menu) { 
    // Inflate the menu; this adds items to the action bar if it is present. 
    getMenuInflater().inflate(R.menu.main, menu); 
    return true; 
} 

} 

Answer 1

一種解決方法是調用按鈕編程

view.performClick() 

或者，如果你想繼續計算，只要在編輯欄輸入用戶什麼TextWatcher

yourView.addTextChangedListener (new TextWatcher() { 

      @Override 
      public void onTextChanged (CharSequence arg0, int arg1, int arg2, int arg3) { 

      } 

      @Override 
      public void beforeTextChanged (CharSequence arg0, int arg1, int arg2, int arg3) { 

      } 

      @Override 
      public void afterTextChanged (Editable val) { 

       //fire your calculation method 
      } 
     });