我正在使用 google map api v2。我在 map 上放置标记长按,我想在拖过我在 map 左侧设置的 android“ic_delete”可绘制边界时删除它们(就像我们在启动器中删除应用程序时所做的那样)。帮助 !
这是我的代码:
map = ((MapFragment) getFragmentManager().findFragmentById(R.id.map)).getMap();
markers = new ArrayList<Marker>();
boolean mReturn = false;
if (map != null) {
map.setMapType(GoogleMap.MAP_TYPE_HYBRID);
mapSettings = map.getUiSettings();
mapSettings.setCompassEnabled(true);
mapSettings.setRotateGesturesEnabled(true);
mapSettings.setZoomControlsEnabled(true);
map.setMyLocationEnabled(true);
map.setOnMapLongClickListener(this);
map.setOnMarkerDragListener(this);
mReturn = true;
}
@Override
public void onMapLongClick(LatLng position) {
// TODO Auto-generated method stub
final LatLng point = position;
Marker marker = map.addMarker(createMarkerOptions("test", "snippet", point, true));
markers.add(marker);
// ...
}
@Override
public void onMarkerDrag(Marker marker) {
// TODO Auto-generated method stub
}
@Override
public void onMarkerDragEnd(Marker marker) {
// TODO Auto-generated method stub
ImageView deleteMarker = (ImageView) findViewById(R.id.deleteMarker);
deleteMarker.setVisibility(View.GONE);
// I want to delete that "marker" if dragged over the "deleteMarker" imageview
}
@Override
public void onMarkerDragStart(Marker marker) {
// TODO Auto-generated method stub
findViewById(R.id.deleteMarker).setVisibility(View.VISIBLE);
}
最佳答案
我想我对您发布的答案有更好的看法。
我试图做完全相同的事情,我这样做的方式是在 Activity 的布局中放置一个 ImageView。
当你点击一个标记时,手机会短暂振动,如果你将标记拖到垃圾桶图像上,图像就会变成红色。如果标记位于垃圾桶顶部,当您停止拖动时,标记将被移除,否则它会回到其初始位置。
我的代码是:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent">
<fragment
android:id="@+id/customMapFragment"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
class="com.myapp.CustomMapFragment" />
<ImageButton
android:id="@+id/ibDeleteMarker"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:layout_alignParentRight="true"
android:src="@drawable/ic_menu_delete"
android:layout_marginRight="8dp"
android:visibility="gone" />
</RelativeLayout>
(将删除图标放在屏幕的中间/右侧)
之后,我将我的标记设置为可拖动
,并且覆盖了相应的方法(在设置GoogleMap.OnMarkerDragListener
之后)。我采用标记屏幕坐标(实际的 x、y 而不是纬度、经度)并检查它们是否重叠(以下代码在我的 MapFragment 中 - 在承载 fragment 的 Activity 中我执行所需的 findViewById 等):
//This is in the activity
deleteMarker = (ImageButton) findViewById(R.id.ibDeleteMarker);
//This is in the MapFragment
vibrator = (Vibrator) activity.getSystemService(Context.VIBRATOR_SERVICE);
//you need also the permission in AndroidManifest
@Override
public void onMarkerDragStart(Marker marker) {
((MainActivity) getActivity()).deleteMarker.setVisibility(View.VISIBLE);
origMarkerPos = marker.getPosition();
vibrator.vibrate(100);
}
@Override
public void onMarkerDrag(Marker marker) {
final ImageView deleteMarker = ((MainActivity) getActivity()).deleteMarker;
Point markerScreenPosition = getMap().getProjection().toScreenLocation(marker.getPosition());
if (overlap(markerScreenPosition, deleteMarker)) {
deleteMarker.setImageResource(R.drawable.ic_menu_delete_red);
} else {
deleteMarker.setImageResource(R.drawable.ic_menu_delete);
}
}
@Override
public void onMarkerDragEnd(Marker marker) {
final ImageView deleteMarker = ((MainActivity) getActivity()).deleteMarker;
deleteMarker.setVisibility(View.GONE);
Point markerScreenPosition = getMap().getProjection().toScreenLocation(marker.getPosition());
if (overlap(markerScreenPosition, deleteMarker)) {
marker.remove();
} else
marker.setPosition(origMarkerPos);
}
private boolean overlap(Point point, ImageView imgview) {
int[] imgCoords = new int[2];
imgview.getLocationOnScreen(imgCoords);
Log.e(TAG, " ****** Img x:" + imgCoords[0] + " y:" + imgCoords[1] + " Point x:" + point.x + " y:" + point.y + " Width:" + imgview.getWidth() + " Height:" + imgview.getHeight());
boolean overlapX = point.x < imgCoords[0] + imgview.getWidth() && point.x > imgCoords[0] - imgview.getWidth();
boolean overlapY = point.y < imgCoords[1] + imgview.getHeight() && point.y > imgCoords[1] - imgview.getWidth();
return overlapX && overlapY;
}
我不知道这是否是最佳解决方案,但它确实有效。
注意:如果您有操作栏,则 y 坐标之间可能存在偏移您必须考虑的标记和 ImageView 。
关于android - 在 ImageView 边界上拖动时删除 map 标记,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/17460315/