title: Why does setAlpha() act on all my buttons whilst setImageResource() acts on just one button?
body: <p>At the moment my buttons do not work. The first two times any are pressed all buttons are influenced rather than just the one that has been pressed.</p>
  
  <p>Swap: </p>
  
  <pre><code>seatButton[i].setAlpha(255);
  </code></pre>
  
  <p>For:</p>
  
  <pre><code>seatButton[i].setImageResource(0x7f020007)
  </code></pre>
  
  <p>And my code works! Only the button I press is effected. Why?</p>
  
  <pre><code>@Override
  public void onCreate(Bundle savedInstanceState) 
  {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.main);
  
      table = new Table(); //Creates Table
      seatButton = new ImageButton[10]; //Creates Array of buttons
      seatStats = new TextView[10]; //Creates array for stat panels
  
  
      //Creates longClickListener, used for players to sit in or out.
      longClickListener = new View.OnLongClickListener() 
  
  
      {
  
  
          @Override
          public boolean onLongClick(View v) 
          {
              for(int i=0; i&lt;10; i++)
              {
                  //Each seat[i] will correspond with each imageButtoni+1
                  if(v.getId() == (getResources().getIdentifier("imageButton" + (i+1), "id", "en.deco.android.livehud"))) 
                  {
                      //If the seat is empty fill it, place a player in the seat and change the button from translucent to opaque
                      if(table.seats[i].getState().equals("empty"))
                      {
  
                          seatButton[i].setAlpha(255);
                          //seatButton[i].setImageResource(0x7f020000);
                          table.seats[i].sit(new Player());
                          seatStats[i].setVisibility(View.VISIBLE);
                          Toast.makeText(GUI.this, table.seats[i].getState(), Toast.LENGTH_SHORT).show();
                      }
                      //If the seat is full, empty it
                      else
                      {
                          seatButton[i].setAlpha(80);
                          //seatButton[i].setImageResource(0x7f020007);
                          table.seats[i].sitOut();
                          seatStats[i].setVisibility(View.INVISIBLE);
                          Toast.makeText(GUI.this, table.seats[i].getState() + i, Toast.LENGTH_SHORT).show();
                      }
                  }
              }
              return true;
          }
      };
  
  
      //Assigns the buttons and stats panels defined in the layout xml to their appropiate java arrays. Also sets clickListeners to buttons.
      for(int i = 0; i &lt; 10; i++)
      {
          seatButton[i] = (ImageButton) findViewById(getResources().getIdentifier("imageButton" + (i+1), "id", "en.deco.android.livehud"));
          seatStats[i] = (TextView) findViewById(getResources().getIdentifier("textView" + (i+1), "id", "en.deco.android.livehud"));
          seatButton[i].setOnLongClickListener(longClickListener);
          seatButton[i].setAlpha(80);
      }
  </code></pre>