title: How to detect how many text fields have values?
body: <p>I have an application which calculates the average from the values that users set. The problem is that I don't know if user sets 2,3 or all text fields with values, and I want my app to detect how many of them are filled and to divide the numbers entered to the number of how many fields are field. Example: If text field 1 = 2, and text field 2 = 3, my application should detect that there are only 2 fields filled, and to make the average from (2+3)/the number of how many text fields are filled, in our case 2. And beside that, I would like that my application to calculate the average exactly, I mean, to show values like 9.5 if the user enter 9 and 10 as values. Hope you understood exactly. Thanks a lot !!!</p>
  
  <p>Here is my:</p>
  
  <p><strong>Medii.java:</strong></p>
  
  <pre><code>package com.cngcnasaud.orar;
  
  import android.app.Activity;
  import android.os.Bundle;
  import android.view.View;
  import android.widget.*;
  
  public class Medii extends Activity {
  
      EditText txtNum1;
      EditText txtNum2;
      EditText txtNum4;
      EditText txtNum5;
      EditText txtTotal;
      Button btnCompute;
  
      @Override
      protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.medii);
  
          txtNum1 = (EditText) findViewById(R.id.editText1);
          txtNum2 = (EditText) findViewById(R.id.editText2);
          txtNum4 = (EditText) findViewById(R.id.editText4);
          txtNum5 = (EditText) findViewById(R.id.editText5);
          txtTotal = (EditText) findViewById(R.id.editText3);
          btnCompute = (Button) findViewById(R.id.bmedii);
  
          btnCompute.setOnClickListener(new ClickButton ());
  
      }
  
  
      private class ClickButton implements Button.OnClickListener{
  
          @Override
          public void onClick(View v) {
  
              int x = Integer.parseInt(txtNum1.getText().toString());
              int y = Integer.parseInt(txtNum2.getText().toString());
              int z = Integer.parseInt(txtNum4.getText().toString());
              int w = Integer.parseInt(txtNum5.getText().toString());
  
              int total = (x + y + z + w)/4;
  
              txtTotal.setText(Integer.toString(total));
  
          }
  
  
      }
  
  }
  </code></pre>