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POOnTouch in MapView only fires the first time
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  1. POOnTouch in MapView only fires the first time
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    copied!<p>I'm trying to implement a double-tap zoom like function in my MapView. The event always fires the first time, but never subsequent times. Below is my code. I have a feeling it has something to do with the map controller getting lost after the first time the event is fired.</p> <pre><code>import android.os.Bundle; import android.view.MotionEvent; import android.view.View; import android.view.View.OnTouchListener; import com.google.android.maps.MapActivity; import com.google.android.maps.MapController; import com.google.android.maps.MapView; public class mainmap extends MapActivity implements OnTouchListener{ long lasttime = -1; MapController mapc; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); MapView mapView = (MapView) findViewById(R.id.mapview); mapView.setBuiltInZoomControls(true); mapc = mapView.getController(); mapView.setOnTouchListener(this); } @Override protected boolean isRouteDisplayed() { // TODO Auto-generated method stub return false; } @Override public boolean onTouch(View v, MotionEvent event) { if (event.getAction() == MotionEvent.ACTION_DOWN){ if(event.getEventTime()-lasttime&lt;2000){ mapc.zoomInFixing((int)event.getX(),(int)event.getY()); } } lasttime=event.getEventTime(); return true; } } </code></pre> <p>I have also tried editing the OnTouch method to cast the incoming View to a MapView, getting the controller while the event is fired. However, I get the same results where the first event is fired but not subsequent ones.</p> <pre><code>public boolean onTouch(View v, MotionEvent event) { if (event.getAction() == MotionEvent.ACTION_DOWN){ if(event.getEventTime()-lasttime&lt;2000){ ((MapView)v).getController().zoomInFixing((int)event.getX(), (int)event.getY()); } } lasttime=event.getEventTime(); return true; } </code></pre> <p>Being as basic as possible, I cut out all of the code in the OnTouch method and programmed it to simply display a small toast message.</p> <pre><code>public boolean onTouch(View v, MotionEvent event) { if (event.getAction() == MotionEvent.ACTION_DOWN){ Toast.makeText(this,"Down!",Toast.LENGTH_SHORT).show(); } return true; } </code></pre> <p>This works as expected, displaying the Toast each time the MapView is touched.</p> <p>I don't understand why the event will fire properly in this case but not in my previous implementation.</p>
 

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