title: onClickListener does not hide my text
body: <p><strong>MainActivity</strong></p>
  
  <pre><code>...
  
  public class MainActivity extends AppCompatActivity implements 
  View.OnClickListener{
      TextView tv;
      @Override
      protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.activity_main);
          tv = (TextView) findViewById(R.id.textID);
          Button b = (Button) findViewById(R.id.button);
          b.setOnClickListener(this);
      }
  
      @Override
      public void onClick(View v){
          tv.setText(R.string.text); 
      }
  }
  </code></pre>
  
  <p><strong>string.xml</strong></p>
  
  <pre><code>&lt;resources&gt;
      &lt;string name="text"&gt;This text do not hide!&lt;/string&gt;
  &lt;/resources&gt;
  </code></pre>
  
  <p>This code is directly showing the text which I will try to show when I click the button.</p>
  
  <p>My question is, where am I making the mistake? Why does this code not work?</p>