blocks|key|1121962|text|来自one+of+my+books的Here+is+a+sample+project显示了安卓系统中谷歌地图上标记的拖放移动。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1121963|简而言之，它使用onTouchEvent()来检测用户何时触摸并将手指放在标记附近。然后，它从覆盖图中删除标记，但使用RelativeLayout将相同的图像放在地图的顶部。然后，在“移动”触摸事件上，图像被移动(比强制整个覆盖重绘更快)。当手指被抬起时，图像将被移除，但标记将放回覆盖图中的新位置。|style|CODE|1121964|entityMap|0|LINK|mutability|MUTABLE|url|http://commonsware.com/AdvAndroid|1|http://github.com/commonsguy/cw-advandroid/tree/master/Maps/NooYawkTouch/^0|2|F|0|I|O|1|0|8|E|1N|E|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@$A|S|B|T|1|U]|$A|V|B|W|1|X]]|C|$]]|$1|D|3|E|5|6|7|Y|8|@$A|Z|B|10|F|G]|$A|11|B|12|F|G]]|9|@]|C|$]]|$1|H|3|-4|5|6|7|13|8|@]|9|@]|C|$]]]|I|$J|$5|K|L|M|C|$N|O]]|P|$5|K|L|M|C|$N|Q]]]]

<a href="http://github.com/commonsguy/cw-advandroid/tree/master/Maps/NooYawkTouch/" rel="noreferrer">Here is a sample project</a> from <a href="http://commonsware.com/AdvAndroid" rel="noreferrer">one of my books</a> showing drag-and-drop movement of markers on a Google Map in Android.

In a nutshell, it uses <code>onTouchEvent()</code> to detect when the user touches and holds their finger near a marker. It then removes the marker from the overlay, but puts the same image over top of the map using <code>RelativeLayout</code>. Then, on "move" touch events, the image is moved (faster than forcing the whole overlay to redraw). When the finger is lifted, the image is removed, but the marker is put back in the overlay at the new spot.

blocks|key|907068|text|我发现了一些针对CommonsWare拖放出色功能的优化。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|907069|我正在用地图上的标记做一些精确的测量，我希望我的标记准确地在我触摸的地方，并举起我的手指，这样测量就非常精确。|907070|在来自CommonsWare的原图中，如果你触摸“靠近”标记，标记不会移动到确切的点，而是随着手指的移动而移动。在ACTION_DOWN、ACTION_MOVE和ACTION_UP上，我需要标记出现在我的手指下方。|907071|这是代码，如果有人需要它。我要感谢CommonsWare提供了这个功能，这是一个非常好的想法。|907072|这是我修改的代码的一部分。|907073|我的MapView是mapa；|907074|++++++++@Override
++++public+boolean+onTouchEvent(MotionEvent+event,+MapView+mapView)+{

++++++++final+int+action=event.getAction();
++++++++final+int+x=(int)event.getX();
++++++++final+int+y=(int)event.getY();
++++++++boolean+result=false;

++++++++++++++if+(action==MotionEvent.ACTION_DOWN)+{
++++++++++++++++for+(OverlayItem+item+:+mOverlays)+{
++++++++++++++++++Point+p=new+Point(0,0);

++++++++++++++++++mapa.getProjection().toPixels(item.getPoint(),+p);

++++++++++++++++++++++//I+maintain+the+hitTest's+bounds+so+you+can+still
++++++++++++++++++++++//press+near+the+marker
++++++++++++++++++if+(hitTest(item,+marker,+x-p.x,+y-p.y))+{
++++++++++++++++++++result=true;

++++++++++++++++++++inDrag=item;

++++++++++++++++++++mOverlays.remove(inDrag);
++++++++++++++++++++populate();

++++++++++++++++++++++++//Instead+of+using+the+DragImageOffSet+and+DragTouchOffSet
++++++++++++++++++++++++//I+use+the+x+and+y+coordenates+from+the+Point
++++++++++++++++++++setDragImagePosition(x,+y);

++++++++++++++++++++dragImage.setVisibility(View.VISIBLE);

++++++++++++++++++++break;
++++++++++++++++++}
++++++++++++++++}
++++++++++++++}
++++++++++++++else+if+(action==MotionEvent.ACTION_MOVE+&&+inDrag!=null)+{
++++++++++++++++setDragImagePosition(x,+y);

++++++++++++++++result=true;
++++++++++++++}
++++++++++++++else+if+(action==MotionEvent.ACTION_UP+&&+inDrag!=null)+{
++++++++++++++++dragImage.setVisibility(View.GONE);

++++++++++++++++++++//I+get+the+geopoint+without+using+any+OffSet,+directly+with+the+
++++++++++++++++++++//Point+coordenates
++++++++++++++++GeoPoint+pt=mapa.getProjection().fromPixels(x,y);

++++++++++++++++OverlayItem+toDrop=new+OverlayItem(pt,+inDrag.getTitle(),
+++++++++++++++++++++++++++++++++++++++++++++++++++inDrag.getSnippet());
++++++++++++++++orig+=+inDrag.getMarker(0);

++++++++++++++++++++//In+my+case+I+had+down+heading+Arrows+as+markers,+so+I+wanted+my+
++++++++++++++++++++//bounds+to+be+at+the+center+bottom
++++++++++++++++toDrop.setMarker(boundCenterBottom(orig));

++++++++++++++++mOverlays.add(toDrop);
++++++++++++++++populate();

++++++++++++++++inDrag=null;
++++++++++++++++result=true;
++++++++++++++}


+++++++++++return(result+%7C%7C+super.onTouchEvent(event,+mapView));


++++}

++++private+void+setDragImagePosition(int+x,+int+y)+{
++++++RelativeLayout.LayoutParams+lp=
++++++++(RelativeLayout.LayoutParams)dragImage.getLayoutParams();

++++++++++//Instead+of+using+OffSet+I+use+the+Point+coordenates.
++++++++++//I+want+my+arrow+to+appear+pointing+to+the+point+I+am+moving,+so+
++++++++++//I+set+the+margins+as+the+Point+coordenates+minus+the+Height+and+half+the
++++++++++//width+of+my+arrow.
++++++lp.setMargins(x-(dragImage.getWidth()/2),y-dragImage.getHeight(),+0,+0);
++++++dragImage.setLayoutParams(lp);
++++}|code-block|syntax|javascript|907075|这样，您的箭头就会出现在您按下的位置，而不是箭头从原来的位置移动。|907076|entityMap^0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|V|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|W|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|X|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|Y|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|Z|8|@]|9|@]|A|$]]|$1|L|3|M|5|N|7|10|8|@]|9|@]|A|$O|P]]|$1|Q|3|R|5|6|7|11|8|@]|9|@]|A|$]]|$1|S|3|-4|5|6|7|12|8|@]|9|@]|A|$]]]|T|$]]

I found a little optimization for the CommonsWare drag and drop's brilliant function.

I was doing some precise meashurements with markers on my map, and I wanted my marker to be exactly on the spot I touched and lifted my finger so the meashurment was exactly precise.

On the original from CommonsWare if you touch "near" the marker, the marker does not go to that exact point, but moves along with your finger's movement.
I needed the marker to appear just below my finger on the ACTION_DOWN, ACTION_MOVE and ACTION_UP.

Here is the code if someone need's it. I have to thank CommonsWare to make this function, it's a really good idea.

This is the part of the code I modified.

My MapView is mapa;

<pre><code> @Override
 public boolean onTouchEvent(MotionEvent event, MapView mapView) {

 final int action=event.getAction();
 final int x=(int)event.getX();
 final int y=(int)event.getY();
 boolean result=false;

 if (action==MotionEvent.ACTION_DOWN) {
 for (OverlayItem item : mOverlays) {
 Point p=new Point(0,0);

 mapa.getProjection().toPixels(item.getPoint(), p);

 //I maintain the hitTest's bounds so you can still
 //press near the marker
 if (hitTest(item, marker, x-p.x, y-p.y)) {
 result=true;

 inDrag=item;

 mOverlays.remove(inDrag);
 populate();

 //Instead of using the DragImageOffSet and DragTouchOffSet
 //I use the x and y coordenates from the Point
 setDragImagePosition(x, y);

 dragImage.setVisibility(View.VISIBLE);

 break;
 }
 }
 }
 else if (action==MotionEvent.ACTION_MOVE &amp;&amp; inDrag!=null) {
 setDragImagePosition(x, y);

 result=true;
 }
 else if (action==MotionEvent.ACTION_UP &amp;&amp; inDrag!=null) {
 dragImage.setVisibility(View.GONE);

 //I get the geopoint without using any OffSet, directly with the 
 //Point coordenates
 GeoPoint pt=mapa.getProjection().fromPixels(x,y);

 OverlayItem toDrop=new OverlayItem(pt, inDrag.getTitle(),
 inDrag.getSnippet());
 orig = inDrag.getMarker(0);

 //In my case I had down heading Arrows as markers, so I wanted my 
 //bounds to be at the center bottom
 toDrop.setMarker(boundCenterBottom(orig));

 mOverlays.add(toDrop);
 populate();

 inDrag=null;
 result=true;
 }


 return(result || super.onTouchEvent(event, mapView));


 }

 private void setDragImagePosition(int x, int y) {
 RelativeLayout.LayoutParams lp=
 (RelativeLayout.LayoutParams)dragImage.getLayoutParams();

 //Instead of using OffSet I use the Point coordenates.
 //I want my arrow to appear pointing to the point I am moving, so 
 //I set the margins as the Point coordenates minus the Height and half the
 //width of my arrow.
 lp.setMargins(x-(dragImage.getWidth()/2),y-dragImage.getHeight(), 0, 0);
 dragImage.setLayoutParams(lp);
 }
</code></pre>

With this you get your arrow appearing where you press with your, instead of the arrow moving from where it was.

blocks|key|907110|text|Here是安卓地图视图中拖放图钉的完整代码|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|907111|entityMap|0|LINK|mutability|MUTABLE|url|http://www.ankitkedia.com/2012/01/08/drag-drop-pin-on-map-for-your-android-application/^0|0|4|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

<a href="http://www.ankitkedia.com/2012/01/08/drag-drop-pin-on-map-for-your-android-application/" rel="nofollow">Here</a> is Complete code of Drag And Drop pin in Mapview in Android

blocks|key|907152|text|实现Google+Maps+Android+API+v2，参考这个：https://developers.google.com/maps/documentation/android/并在GoogleMap+object+setOnMarkerDragListener上设置。对于Ex：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|907153|map.setOnMarkerDragListener(new+OnMarkerDragListener()+{
++++++++@Override
++++++++public+void+onMarkerDragStart(Marker+arg0)+{
++++++++++++//+TODO+Auto-generated+method+stub
++++++++++++Log.d("System+out",+"onMarkerDragStart..."%2Barg0.getPosition().latitude%2B"..."%2Barg0.getPosition().longitude);
++++++++}

++++++++@SuppressWarnings("unchecked")
++++++++@Override
++++++++public+void+onMarkerDragEnd(Marker+arg0)+{
++++++++++++//+TODO+Auto-generated+method+stub
++++++++++++Log.d("System+out",+"onMarkerDragEnd..."%2Barg0.getPosition().latitude%2B"..."%2Barg0.getPosition().longitude);

++++++++++++map.animateCamera(CameraUpdateFactory.newLatLng(arg0.getPosition()));
++++++++}

++++++++@Override
++++++++public+void+onMarkerDrag(Marker+arg0)+{
++++++++++++//+TODO+Auto-generated+method+stub
++++++++++++Log.i("System+out",+"onMarkerDrag...");
++++++++}
++++});

//Don't+forget+to+Set+draggable(true)+to+marker,+if+this+not+set+marker+does+not+drag.

map.addMarker(new+MarkerOptions()
++++.position(crntLocationLatLng)
++++.icon(BitmapDescriptorFactory.fromResource(R.drawable.icon_my_location))
++++.draggable(true));|code-block|syntax|javascript|907154|entityMap|0|LINK|mutability|MUTABLE|url|https://developers.google.com/maps/documentation/android/^0|Y|1L|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@$A|R|B|S|1|T]]|C|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]]]

Implement Google Maps Android API v2, refer this: <a href="https://developers.google.com/maps/documentation/android/" rel="noreferrer">https://developers.google.com/maps/documentation/android/</a> and set on GoogleMap object setOnMarkerDragListener. For Ex:

<pre><code>map.setOnMarkerDragListener(new OnMarkerDragListener() {
 @Override
 public void onMarkerDragStart(Marker arg0) {
 // TODO Auto-generated method stub
 Log.d("System out", "onMarkerDragStart..."+arg0.getPosition().latitude+"..."+arg0.getPosition().longitude);
 }

 @SuppressWarnings("unchecked")
 @Override
 public void onMarkerDragEnd(Marker arg0) {
 // TODO Auto-generated method stub
 Log.d("System out", "onMarkerDragEnd..."+arg0.getPosition().latitude+"..."+arg0.getPosition().longitude);

 map.animateCamera(CameraUpdateFactory.newLatLng(arg0.getPosition()));
 }

 @Override
 public void onMarkerDrag(Marker arg0) {
 // TODO Auto-generated method stub
 Log.i("System out", "onMarkerDrag...");
 }
 });

//Don't forget to Set draggable(true) to marker, if this not set marker does not drag.

map.addMarker(new MarkerOptions()
 .position(crntLocationLatLng)
 .icon(BitmapDescriptorFactory.fromResource(R.drawable.icon_my_location))
 .draggable(true));
</code></pre>

blocks|key|1122101|text|为了MapsV2。使用google地图事件。不要写你自己的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1122102|++++++++mMap.setOnMapClickListener(new+GoogleMap.OnMapClickListener()+{
++++++++++++@Override
++++++++++++public+void+onMapClick(LatLng+latLng)+{
++++++++++++++++mVisitingMarker.setPosition(latLng);
++++++++++++++++mMap.animateCamera(CameraUpdateFactory.newLatLng(latLng));
++++++++++++}
++++++++});

++++++++mMap.setOnMarkerDragListener(new+GoogleMap.OnMarkerDragListener()+{
++++++++++++@Override
++++++++++++public+void+onMarkerDragStart(Marker+arg0)+{
++++++++++++}

++++++++++++@SuppressWarnings("unchecked")
++++++++++++@Override
++++++++++++public+void+onMarkerDragEnd(Marker+arg0)+{
+++++++++++++++Log.d("System+out",+"onMarkerDragEnd...");
++++++++++++++++mMap.animateCamera(CameraUpdateFactory.newLatLng(arg0.getPosition()));
++++++++++++}

++++++++++++@Override
++++++++++++public+void+onMarkerDrag(Marker+arg0)+{
++++++++++++}
++++++++});|code-block|syntax|javascript|1122103|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

For MapsV2. Use the google map events. Don't write your own.

<pre><code> mMap.setOnMapClickListener(new GoogleMap.OnMapClickListener() {
 @Override
 public void onMapClick(LatLng latLng) {
 mVisitingMarker.setPosition(latLng);
 mMap.animateCamera(CameraUpdateFactory.newLatLng(latLng));
 }
 });

 mMap.setOnMarkerDragListener(new GoogleMap.OnMarkerDragListener() {
 @Override
 public void onMarkerDragStart(Marker arg0) {
 }

 @SuppressWarnings("unchecked")
 @Override
 public void onMarkerDragEnd(Marker arg0) {
 Log.d("System out", "onMarkerDragEnd...");
 mMap.animateCamera(CameraUpdateFactory.newLatLng(arg0.getPosition()));
 }

 @Override
 public void onMarkerDrag(Marker arg0) {
 }
 });
</code></pre>

blocks|key|907251|text|下面是Kotlin+Lover的答案！这很简单！正如你在下面看到的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|907252|+++googleMap.addMarker(
++++++++MarkerOptions()
++++++++++++.position(latLatLng).draggable(true)
++++)|code-block|syntax|javascript|907253|下面是用于获取末端拖动位置的线性代码|907254|+++mMap.setOnMarkerDragListener(object+:+GoogleMap.OnMarkerDragListener+{
++++++++override+fun+onMarkerDragStart(arg0:+Marker)+{

++++++++}

++++++++override+fun+onMarkerDragEnd(arg0:+Marker)+{
++++++++++++mMap.animateCamera(CameraUpdateFactory.newLatLngZoom(arg0.position,+1.0f))
++++++++++++val+message+=+arg0.position.latitude.toString()+%2B+""+%2B+arg0.position.longitude.toString()
++++++++++++Log.d(TAG+%2B+"_END",+message)
++++++++}

++++++++override+fun+onMarkerDrag(arg0:+Marker?)+{
++++++++++++val+message+=+arg0!!.position.latitude.toString()+%2B+""+%2B+arg0.position.longitude.toString()
++++++++++++Log.d(TAG+%2B+"_DRAG",+message)
++++++++}
++++})|907255|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

Below is the answer to Kotlin Lover! It's quite very simple! As you can see below.
<pre><code> googleMap.addMarker(
 MarkerOptions()
 .position(latLatLng).draggable(true)
 )
</code></pre>
Below is the liner code for getting the end dragging location
<pre><code> mMap.setOnMarkerDragListener(object : GoogleMap.OnMarkerDragListener {
 override fun onMarkerDragStart(arg0: Marker) {

 }

 override fun onMarkerDragEnd(arg0: Marker) {
 mMap.animateCamera(CameraUpdateFactory.newLatLngZoom(arg0.position, 1.0f))
 val message = arg0.position.latitude.toString() + &quot;&quot; + arg0.position.longitude.toString()
 Log.d(TAG + &quot;_END&quot;, message)
 }

 override fun onMarkerDrag(arg0: Marker?) {
 val message = arg0!!.position.latitude.toString() + &quot;&quot; + arg0.position.longitude.toString()
 Log.d(TAG + &quot;_DRAG&quot;, message)
 }
 })
</code></pre>

Hi?
I am working on a MapView app in Android. I have three markers that I want to be able to use the Google Map API getlocation-function on, later on. In order to try it out I would like to move the marker with a drag and drop-function, and then check the location. 

Anyone who has gotten a drag and drop to work on an android marker, or know a way to start figuring it out?

/AK

How does one implement drag and drop for Android marker?

Android

Kotlin

嗨?我正在开发一个安卓系统的MapView应用程序。我有三个标记，我希望稍后能够使用Google Map API的getlocation-function。为了尝试它，我想用拖放功能移动标记，然后检查位置。有谁已经在android标记上进行了拖放操作，或者知道如何开始解决这个问题？/AK

问如何实现Android标记的拖放？
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