@Override
public void onMapReady(GoogleMap map) {
try {
final ViewGroup parent = (ViewGroup) mMapView.findViewWithTag("GoogleMapMyLocationButton").getParent();
parent.post(new Runnable() {
@Override
public void run() {
try {
Resources r = getResources();
//convert our dp margin into pixels
int marginPixels = (int)TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 20, r.getDisplayMetrics());
// Get the map compass view
View mapCompass = parent.getChildAt(4);
// create layoutParams, giving it our wanted width and height(important, by default the width is "match parent")
RelativeLayout.LayoutParams rlp = new RelativeLayout.LayoutParams(mapCompass.getHeight(),mapCompass.getHeight());
// position on top right
rlp.addRule(RelativeLayout.ALIGN_PARENT_LEFT, 0);
rlp.addRule(RelativeLayout.ALIGN_PARENT_TOP);
rlp.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
rlp.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM, 0);
//give compass margin
rlp.setMargins(marginPixels, marginPixels, marginPixels, marginPixels);
mapCompass.setLayoutParams(rlp);
} catch (Exception ex) {
ex.printStackTrace();
}
}
});
} catch (Exception ex) {
ex.printStackTrace();
}
}
我知道这个问题已经存在很长时间了,但是几天前我遇到了同样的问题,我像下面这样解决了它:
try {
assert mapFragment.getView() != null;
final ViewGroup parent = (ViewGroup) mapFragment.getView().findViewWithTag("GoogleMapMyLocationButton").getParent();
parent.post(new Runnable() {
@Override
public void run() {
try {
for (int i = 0, n = parent.getChildCount(); i < n; i++) {
View view = parent.getChildAt(i);
RelativeLayout.LayoutParams rlp = (RelativeLayout.LayoutParams) view.getLayoutParams();
// position on right bottom
rlp.addRule(RelativeLayout.ALIGN_PARENT_LEFT, 0);
rlp.addRule(RelativeLayout.ALIGN_PARENT_TOP,0);
rlp.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
rlp.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
rlp.rightMargin = rlp.leftMargin;
rlp.bottomMargin = 25;
view.requestLayout();
}
} catch (Exception ex) {
ex.printStackTrace();
}
}
});
} catch (Exception ex) {
ex.printStackTrace();
}
在这个例子中,我把指南针放在右下角。当您执行此操作时,请确保您的mapFragment已经创建好了,我建议您在MapFragment的"onMapReady"方法中运行代码。
最好使用以下代码片段:
mapView.findViewWithTag<View>("GoogleMapCompass")?.let { compass ->
compass.post {
val topMargin = compass.marginTop
val rlp = RelativeLayout.LayoutParams(compass.height, compass.height)
rlp.addRule(RelativeLayout.ALIGN_PARENT_LEFT, 0)
rlp.addRule(RelativeLayout.ALIGN_PARENT_TOP)
rlp.addRule(RelativeLayout.ALIGN_PARENT_RIGHT)
rlp.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM, 0)
val endMargin = (4 * Resources.getSystem().displayMetrics.density).toInt()
rlp.setMargins(0, topMargin, endMargin, 0)
compass.layoutParams = rlp
}
}
这样你就不必使用"GoogleMapMyLocationButton"并遍历其父级。遍历父级没有任何好处,并且在未来谷歌提供地图视图更新时更容易出现问题。 在这段代码片段中,直接访问罗盘,这是你需要的元素。
根据@Vignon的答案(https://dev59.com/8GUp5IYBdhLWcg3wzpxk#38266867),这里是一个Kotlin代码片段,用于将指南针图标定位到屏幕右上角。 您还可以添加自定义边距(在此示例中,指南针图像具有50dp的marginTop)。
mapFragment?.view?.let { mapView ->
mapView.findViewWithTag<View>("GoogleMapMyLocationButton").parent?.let { parent ->
val vg: ViewGroup = parent as ViewGroup
vg.post {
val mapCompass: View = parent.getChildAt(4)
val rlp = RelativeLayout.LayoutParams(mapCompass.height, mapCompass.height)
rlp.addRule(RelativeLayout.ALIGN_PARENT_LEFT, 0)
rlp.addRule(RelativeLayout.ALIGN_PARENT_TOP)
rlp.addRule(RelativeLayout.ALIGN_PARENT_RIGHT)
rlp.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM, 0)
val topMargin = (50 * Resources.getSystem().displayMetrics.density).toInt()
rlp.setMargins(0, topMargin, 0, 0)
mapCompass.layoutParams = rlp
}
}
}
// change compass position
if (mapView != null &&
mapView.findViewById(Integer.parseInt("1")) != null) {
// Get the view
View locationCompass = ((View) mapView.findViewById(Integer.parseInt("1")).getParent()).findViewById(Integer.parseInt("5"));
// and next place it, on bottom right (as Google Maps app)
RelativeLayout.LayoutParams layoutParams = (RelativeLayout.LayoutParams)
locationCompass.getLayoutParams();
// position on right bottom
layoutParams.addRule(RelativeLayout.ALIGN_PARENT_TOP, RelativeLayout.TRUE);
layoutParams.setMargins(0, 160,30, 0); // 160 la truc y , 30 la truc x
}
fun View.getAllChildren(): List<View> {
val result = ArrayList<View>()
if (this !is ViewGroup) {
result.add(this)
} else {
for (index in 0 until this.childCount) {
val child = this.getChildAt(index)
result.addAll(child.getAllChildren())
}
}
return result
}
接下来,我只需通过查找其内容描述来检索指南针(如果内容描述在将来更改,请使用布局检查器进行检索)。
当您拥有视图时,可以像这样更改其位置:
binding.mapView
.getAllChildren()
.firstOrNull { it.contentDescription == "Compass" }
?.let { it.y = it.y + 400 }
跟随 @Vignon herre 的建议,在 Kotlin 中将指南针放在左下角:
mapFragment.view?.let { mapView->
mapView.findViewWithTag<View>("GoogleMapMyLocationButton").parent?.let { parent->
val vg: ViewGroup = parent as ViewGroup
vg.post {
val mapCompass :View = parent.getChildAt(4)
val rlp = RelativeLayout.LayoutParams(mapCompass.height, mapCompass.height)
rlp.addRule(RelativeLayout.ALIGN_PARENT_LEFT)
rlp.addRule(RelativeLayout.ALIGN_PARENT_TOP,0)
rlp.addRule(RelativeLayout.ALIGN_PARENT_RIGHT,0)
rlp.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM)
val bottomMargin = (40 * Resources.getSystem().displayMetrics.density).toInt()
val leftMargin = (5 * Resources.getSystem().displayMetrics.density).toInt()
rlp.setMargins(leftMargin,0,0,bottomMargin)
mapCompass.layoutParams = rlp
}
}
}