Android programming

I have a small snippet of the code how to Change the value MYAPID below from input text field contents
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MMAdView interAdView = new MMAdView(this, MYAPID, MMAdView.FULLSCREEN_AD_TRANSITION, true, null);
interAdView.fetch();
interAdView.setListener(new BasicMMAdListener(){
  @Override
  public void MMAdCachingCompleted(MMAdView adview, boolean success)
  {
    if(success)
      adview.display();
  }
});