title: android emulator not working?
body: <p>I develop mostly for iPhone and have started very recently with Android.</p>
  
  <p>Tried the hello world, but when hit run the emulator just shows a black screen with an Android logo shining.</p>
  
  <pre><code>package com.hyper.tuti;
  
  import android.app.Activity;
  import android.os.Bundle;
  import android.widget.TextView;
  
  public class TutiActivity extends Activity {
      /** Called when the activity is first created. */
      @Override
      public void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          // setContentView(R.layout.main);
          TextView tv = new TextView(this);
          tv.setText("Hello, Android");
          setContentView(tv);
      }
  }
  </code></pre>
  
  <p>why is my simulator not working??</p>