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map touch listener for graphic overlay and feature layer in android sdk 100.5.0

AsifIsmail

Hello everyone,

in my app,i have scenario where i show feature layer with some points.i have created a class that extends defaultmaptouchlistener to handle tap events. this works fine without an issue.

in some cases,my map may also have some graphic overlays which also need to be tap recognized,the problem is that the tap listener fails to recognize tap events on graphic overlays..

how do i create a single taplistener that works both for feature layer points and graphic overlays?

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Accepted answers

TylerSchiewe

In the "nested" approach I posted above, if you click on a graphic, features (layers) will not be queried:

<SPAN class="" style="color: #0077aa; border: 0px; font-weight: inherit; font-size: 14px;">if</SPAN> <SPAN class="" style="color: #999999; border: 0px; font-weight: inherit; font-size: 14px;">(</SPAN>identifyGraphicsResults<SPAN class="" style="color: #999999; border: 0px; font-weight: inherit; font-size: 14px;">.</SPAN><SPAN class="" style="color: #d74444; border: 0px; font-weight: inherit; font-size: 14px;">size</SPAN><SPAN class="" style="color: #999999; border: 0px; font-weight: inherit; font-size: 14px;">(</SPAN><SPAN class="" style="color: #999999; border: 0px; font-weight: inherit; font-size: 14px;">)</SPAN> <SPAN class="" style="color: #a67f59; background: rgba(255, 255, 255, 0.5); border: 0px; font-weight: inherit; font-size: 14px;">></SPAN> <SPAN class="" style="color: #990000; border: 0px; font-weight: inherit; font-size: 14px;">0</SPAN><SPAN class="" style="color: #999999; border: 0px; font-weight: inherit; font-size: 14px;">)</SPAN> <SPAN class="" style="color: #999999; border: 0px; font-weight: inherit; font-size: 14px;">{</SPAN>
&nbsp;&nbsp;&nbsp;<SPAN class="" style="color: slategray; border: 0px; font-weight: inherit; font-size: 14px;">// process the tapped graphic results (don't query features)...</SPAN>
<SPAN class="" style="color: #999999; border: 0px; font-weight: inherit; font-size: 14px;">}</SPAN> <SPAN class="" style="color: #0077aa; border: 0px; font-weight: inherit; font-size: 14px;">else</SPAN> <SPAN class="" style="color: #999999; border: 0px; font-weight: inherit; font-size: 14px;">{</SPAN>
&nbsp;&nbsp;&nbsp;<SPAN class="" style="color: slategray; border: 0px; font-weight: inherit; font-size: 14px;">// no graphics were tapped (query features)...</SPAN>

If you want clicked features to have priority, you can query them in the opposite order.

If you don't want to prioritize features over graphics or vice versa, you can use the "separate" approach.

Currently, the API does not provide a way to query features and graphics simultaneously. For one, IdentifyGraphicsOverlayResult does not share a parent class with IdentifyLayerResult. So it is up to you to determine how you want to combine the queries/results. If you do need this ability, please submit a feature request.

All comments

TylerSchiewe

Hi Asif,

I assume that your custom touch listener looks a bit like the one in this sample: https://github.com/Esri/arcgis-runtime-samples-android/blob/master/java/identify-graphics/src/main/java/com/esri/arcgisruntime/sample/identifygraphics/MainActivity.java#L110.

To get tapped graphics and features, you will need to call both mapView.identifyGraphicsOverlaysAsync and mapView.identifyLayersAsync. There isn't a method which can be used to identify both. You can either process the results in separate doneListeners or nest one inside the other, depending on what you want to do. This should happen in your onSingleTappedConfirmed method.

Separate:

<SPAN class="comment token">// identify graphics...</SPAN>
<SPAN class="keyword token">final</SPAN> ListenableFuture<SPAN class="operator token"><</SPAN>List<SPAN class="operator token"><</SPAN>IdentifyGraphicsOverlayResult<SPAN class="operator token">>></SPAN> identifyGraphicsFuture <SPAN class="operator token">=</SPAN> mMapView<SPAN class="punctuation token">.</SPAN><SPAN class="token function">identifyGraphicsOverlaysAsync</SPAN><SPAN class="punctuation token">(</SPAN>screenPoint<SPAN class="punctuation token">,</SPAN> <SPAN class="number token">10.0</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="token boolean">false</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
identifyGraphicsFuture<SPAN class="punctuation token">.</SPAN><SPAN class="token function">addDoneListener</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="keyword token">new</SPAN> <SPAN class="token class-name">Runnable</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN>
	@Override
	<SPAN class="keyword token">public</SPAN> <SPAN class="keyword token">void</SPAN> <SPAN class="token function">run</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN>
		<SPAN class="keyword token">try</SPAN> <SPAN class="punctuation token">{</SPAN>
			List<SPAN class="operator token"><</SPAN>IdentifyGraphicsOverlayResult<SPAN class="operator token">></SPAN> identifyGraphicsResults <SPAN class="operator token">=</SPAN> identifyGraphicsFuture<SPAN class="punctuation token">.</SPAN><SPAN class="token function">get</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
			<SPAN class="keyword token">if</SPAN> <SPAN class="punctuation token">(</SPAN>identifyGraphicsResults<SPAN class="punctuation token">.</SPAN><SPAN class="token function">size</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="operator token">></SPAN> <SPAN class="number token">0</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN>
			  <SPAN class="comment token">// process the tapped graphic results...</SPAN>
			<SPAN class="punctuation token">}</SPAN>
		<SPAN class="punctuation token">}</SPAN> <SPAN class="keyword token">catch</SPAN><SPAN class="punctuation token">(</SPAN>InterruptedException <SPAN class="operator token">|</SPAN> ExecutionException ie<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">{</SPAN>
			ie<SPAN class="punctuation token">.</SPAN><SPAN class="token function">printStackTrace</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
		<SPAN class="punctuation token">}</SPAN>
	<SPAN class="punctuation token">}</SPAN>
<SPAN class="punctuation token">}</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>

<SPAN class="comment token">// identify features...</SPAN>
<SPAN class="keyword token">final</SPAN> ListenableFuture<SPAN class="operator token"><</SPAN>List<SPAN class="operator token"><</SPAN>IdentifyLayerResult<SPAN class="operator token">>></SPAN> identifyLayersFuture <SPAN class="operator token">=</SPAN> mMapView<SPAN class="punctuation token">.</SPAN><SPAN class="token function">identifyLayersAsync</SPAN><SPAN class="punctuation token">(</SPAN>screenPoint<SPAN class="punctuation token">,</SPAN> <SPAN class="number token">10.0</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="token boolean">false</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
identifyLayersFuture<SPAN class="punctuation token">.</SPAN><SPAN class="token function">addDoneListener</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="keyword token">new</SPAN> <SPAN class="token class-name">Runnable</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN>
  @Override
  <SPAN class="keyword token">public</SPAN> <SPAN class="keyword token">void</SPAN> <SPAN class="token function">run</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN>
	<SPAN class="keyword token">try</SPAN> <SPAN class="punctuation token">{</SPAN>
		List<SPAN class="operator token"><</SPAN>IdentifyLayerResult<SPAN class="operator token">></SPAN> identifyLayerResults <SPAN class="operator token">=</SPAN> identifyLayersFuture<SPAN class="punctuation token">.</SPAN><SPAN class="token function">get</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
		<SPAN class="keyword token">if</SPAN> <SPAN class="punctuation token">(</SPAN>identifyLayerResults<SPAN class="punctuation token">.</SPAN><SPAN class="token function">size</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="operator token">></SPAN> <SPAN class="number token">0</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN>
		  <SPAN class="comment token">// process the tapped feature results...</SPAN>
		<SPAN class="punctuation token">}</SPAN>
	<SPAN class="punctuation token">}</SPAN> <SPAN class="keyword token">catch</SPAN><SPAN class="punctuation token">(</SPAN>InterruptedException <SPAN class="operator token">|</SPAN> ExecutionException ex<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">{</SPAN>
		ex<SPAN class="punctuation token">.</SPAN><SPAN class="token function">printStackTrace</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
	<SPAN class="punctuation token">}</SPAN>
  <SPAN class="punctuation token">}</SPAN>
<SPAN class="punctuation token">}</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN><SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>

Nested:

<SPAN class="comment token">// identify graphics on the graphics overlay</SPAN>
<SPAN class="keyword token">final</SPAN> ListenableFuture<SPAN class="operator token"><</SPAN>List<SPAN class="operator token"><</SPAN>IdentifyGraphicsOverlayResult<SPAN class="operator token">>></SPAN> identifyGraphicsFuture <SPAN class="operator token">=</SPAN> mMapView<SPAN class="punctuation token">.</SPAN><SPAN class="token function">identifyGraphicsOverlaysAsync</SPAN><SPAN class="punctuation token">(</SPAN>screenPoint<SPAN class="punctuation token">,</SPAN> <SPAN class="number token">10.0</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="token boolean">false</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>

identifyGraphicsFuture<SPAN class="punctuation token">.</SPAN><SPAN class="token function">addDoneListener</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="keyword token">new</SPAN> <SPAN class="token class-name">Runnable</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN>
	@Override
	<SPAN class="keyword token">public</SPAN> <SPAN class="keyword token">void</SPAN> <SPAN class="token function">run</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN>
		<SPAN class="keyword token">try</SPAN> <SPAN class="punctuation token">{</SPAN>
			List<SPAN class="operator token"><</SPAN>IdentifyGraphicsOverlayResult<SPAN class="operator token">></SPAN> identifyGraphicsResults <SPAN class="operator token">=</SPAN> identifyGraphicsFuture<SPAN class="punctuation token">.</SPAN><SPAN class="token function">get</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
			<SPAN class="keyword token">if</SPAN> <SPAN class="punctuation token">(</SPAN>identifyGraphicsResults<SPAN class="punctuation token">.</SPAN><SPAN class="token function">size</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="operator token">></SPAN> <SPAN class="number token">0</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN>
			  <SPAN class="comment token">// process the tapped graphic results...</SPAN>
			<SPAN class="punctuation token">}</SPAN> <SPAN class="keyword token">else</SPAN> <SPAN class="punctuation token">{</SPAN>
			  <SPAN class="comment token">// no graphics were tapped, try to identify tapped features...</SPAN>
			  <SPAN class="keyword token">final</SPAN> ListenableFuture<SPAN class="operator token"><</SPAN>List<SPAN class="operator token"><</SPAN>IdentifyLayerResult<SPAN class="operator token">>></SPAN> identifyLayersFuture <SPAN class="operator token">=</SPAN> mMapView<SPAN class="punctuation token">.</SPAN><SPAN class="token function">identifyLayersAsync</SPAN><SPAN class="punctuation token">(</SPAN>screenPoint<SPAN class="punctuation token">,</SPAN> <SPAN class="number token">10.0</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="token boolean">false</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
			  identifyLayersFuture<SPAN class="punctuation token">.</SPAN><SPAN class="token function">addDoneListener</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="keyword token">new</SPAN> <SPAN class="token class-name">Runnable</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN>
				  @Override
				  <SPAN class="keyword token">public</SPAN> <SPAN class="keyword token">void</SPAN> <SPAN class="token function">run</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN>
					<SPAN class="keyword token">try</SPAN> <SPAN class="punctuation token">{</SPAN>
						List<SPAN class="operator token"><</SPAN>IdentifyLayerResult<SPAN class="operator token">></SPAN> identifyLayerResults <SPAN class="operator token">=</SPAN> identifyLayersFuture<SPAN class="punctuation token">.</SPAN><SPAN class="token function">get</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
						<SPAN class="keyword token">if</SPAN> <SPAN class="punctuation token">(</SPAN>identifyLayerResults<SPAN class="punctuation token">.</SPAN><SPAN class="token function">size</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="operator token">></SPAN> <SPAN class="number token">0</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN>
						  <SPAN class="comment token">// process the tapped feature results...</SPAN>
						<SPAN class="punctuation token">}</SPAN> <SPAN class="keyword token">else</SPAN> <SPAN class="punctuation token">{</SPAN>
						  <SPAN class="comment token">// no graphics or features were tapped</SPAN>
						<SPAN class="punctuation token">}</SPAN>
					<SPAN class="punctuation token">}</SPAN> <SPAN class="keyword token">catch</SPAN><SPAN class="punctuation token">(</SPAN>InterruptedException <SPAN class="operator token">|</SPAN> ExecutionException ex<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">{</SPAN>
						ex<SPAN class="punctuation token">.</SPAN><SPAN class="token function">printStackTrace</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
					<SPAN class="punctuation token">}</SPAN>
				  <SPAN class="punctuation token">}</SPAN>
			  <SPAN class="punctuation token">}</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
			<SPAN class="punctuation token">}</SPAN>
		<SPAN class="punctuation token">}</SPAN> <SPAN class="keyword token">catch</SPAN><SPAN class="punctuation token">(</SPAN>InterruptedException <SPAN class="operator token">|</SPAN> ExecutionException ie<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">{</SPAN>
			ie<SPAN class="punctuation token">.</SPAN><SPAN class="token function">printStackTrace</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
		<SPAN class="punctuation token">}</SPAN>
	<SPAN class="punctuation token">}</SPAN>
<SPAN class="punctuation token">}</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍<SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>

Hope this helps.

AsifIsmail

so if we need to have 2 separate identifiers to identify graphics and features, i think it would be a unoptimized solution,

what if i click on graphics only, in this scenario..the other layers which are on the map are getting queried for no use right ?

TylerSchiewe

In the "nested" approach I posted above, if you click on a graphic, features (layers) will not be queried:

<SPAN class="" style="color: #0077aa; border: 0px; font-weight: inherit; font-size: 14px;">if</SPAN> <SPAN class="" style="color: #999999; border: 0px; font-weight: inherit; font-size: 14px;">(</SPAN>identifyGraphicsResults<SPAN class="" style="color: #999999; border: 0px; font-weight: inherit; font-size: 14px;">.</SPAN><SPAN class="" style="color: #d74444; border: 0px; font-weight: inherit; font-size: 14px;">size</SPAN><SPAN class="" style="color: #999999; border: 0px; font-weight: inherit; font-size: 14px;">(</SPAN><SPAN class="" style="color: #999999; border: 0px; font-weight: inherit; font-size: 14px;">)</SPAN> <SPAN class="" style="color: #a67f59; background: rgba(255, 255, 255, 0.5); border: 0px; font-weight: inherit; font-size: 14px;">></SPAN> <SPAN class="" style="color: #990000; border: 0px; font-weight: inherit; font-size: 14px;">0</SPAN><SPAN class="" style="color: #999999; border: 0px; font-weight: inherit; font-size: 14px;">)</SPAN> <SPAN class="" style="color: #999999; border: 0px; font-weight: inherit; font-size: 14px;">{</SPAN>
&nbsp;&nbsp;&nbsp;<SPAN class="" style="color: slategray; border: 0px; font-weight: inherit; font-size: 14px;">// process the tapped graphic results (don't query features)...</SPAN>
<SPAN class="" style="color: #999999; border: 0px; font-weight: inherit; font-size: 14px;">}</SPAN> <SPAN class="" style="color: #0077aa; border: 0px; font-weight: inherit; font-size: 14px;">else</SPAN> <SPAN class="" style="color: #999999; border: 0px; font-weight: inherit; font-size: 14px;">{</SPAN>
&nbsp;&nbsp;&nbsp;<SPAN class="" style="color: slategray; border: 0px; font-weight: inherit; font-size: 14px;">// no graphics were tapped (query features)...</SPAN>

If you want clicked features to have priority, you can query them in the opposite order.

If you don't want to prioritize features over graphics or vice versa, you can use the "separate" approach.

AsifIsmail

Thanks tyler,

but what if i have more than one graphicsoverlay.. how do i differentiate them?

i mean how do i identify the tap on group of graphic layers in graphic overlay in the map ?

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