title: error on Button.setOnClickListener(listener);
body: <pre><code>private int ServiceLeft;
  private int ServiceRight;
  private int Services;
  
  final TextView countTextViewPlusL = (TextView) findViewById(R.id.TextViewCountL);
  final Button ServiceButtonLeft = (Button) findViewById(R.id.ButtonServiceLeft);
  final TextView countTextViewPlusR = (TextView) findViewById(R.id.TextViewCountR);
  final Button ServiceButtonRight = (Button) findViewById(R.id.ButtonServiceRight);
  
  ServiceButtonLeft.setOnClickListener(listener);
  ServiceButtonRight.setOnClickListener(listener);
  
  View.OnClickListener listener = new View.OnClickListener() {
      public void onClick(View v) {
          switch(v.getId()) {
              case R.id.ButtonServiceRight:
                  ServiceRight++;
                  break;
              case R.id.ButtonServiceLeft:
                  ServiceLeft++;
                  break;
          }
  
          if(Services % 2 == 0) {
              getDrawable(R.drawable.test);
          }
      }
  };
  </code></pre>
  
  <p>i get an error on these 2 lines: on the word "listener"</p>
  
  <pre><code>ServiceButtonLeft.setOnClickListener(listener);
  ServiceButtonRight.setOnClickListener(listener);
  </code></pre>