构建基于位置的应用
我在点击标记时向地图和信息窗口添加标记
代码：
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
UiSettings uiSettings = mMap.getUiSettings();
uiSettings.setMyLocationButtonEnabled(false);
uiSettings.setMapToolbarEnabled(false);
mMapCoastLocationService.init(mMap);
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
return;
}
mMap.setMyLocationEnabled(true);
// set the markers - new
mMap.setInfoWindowAdapter(new GoogleMap.InfoWindowAdapter() {
@Override
public View getInfoWindow(Marker marker) {
return null;
}
@Override
public View getInfoContents(Marker marker) {
View view = LayoutInflater.from(context).inflate(R.layout.map_marker_info_contents, null, false);
//ImageView icon = (ImageView) view.findViewById(R.id.marker_info_window_icon);
//icon.setImageResource(R.drawable.info);
TextView title = (TextView) view.findViewById(R.id.marker_info_window_title);
title.setText(marker.getTitle());
return view;
}
});
mMap.setOnInfoWindowClickListener(new GoogleMap.OnInfoWindowClickListener() {
@Override
public void onInfoWindowClick(Marker marker) {
Integer coastId = mMapCoastLocationService.getCoastIdByMarker(marker);
startCoastDetailsActivity(coastId);
}
});
mFocusMyLocationButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
focusMyLocation();
}
});
}
标记的xml：
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:orientation="horizontal">
<ImageView
android:id="@+id/marker_info_window_icon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:contentDescription="info image"
android:src="@drawable/info" />
<TextView
android:id="@+id/marker_info_window_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"`enter code here`
android:layout_marginLeft="@dimen/marker_text_margin"
android:layout_marginStart="@dimen/marker_text_margin"
android:text="example"
android:textColor="#000"/>
</LinearLayout>
问题是我第一次运行应用程序时，当我点击一个标记时，我只得到文本而不是图标而点击不起作用
第二次一切都运转良好。
有什么帮助吗？
答案 0 :(得分：0)
这是因为Google Maps InfoWindow在显示之前将InfoWindow呈现为位图（点击时） 这意味着如果您有一个来自Web的图像源或一个大的本地资源加载到InfoWindow内的ImageView，它可能无法在InfoWindow渲染完成之前完成..
第二次加载图片时，InfoWindow已经呈现，因此会出现..
解决方案（使用Glide如下）：
public class MarkerInfoWindowAdapter implements GoogleMap.InfoWindowAdapter, GoogleMap.OnInfoWindowClickListener {
private static final String TAG = MarkerInfoWindowAdapter.class.getName();;
private static Context mContext;
private static View mapInfoWindow;
private static ImageView infoWindowIcon;
private static TextView infoWindowTitle;
private static TextView infoWindowDetails;
private static TextView infoWindowCount;
public MarkerInfoWindowAdapter(Context context){
mContext = context;
mapInfoWindow = ((SessionsActivity) context).getLayoutInflater().inflate(R.layout.marker_info_layout, null);
infoWindowIcon = (ImageView) mapInfoWindow.findViewById(R.id.session_icon);
infoWindowTitle = (TextView) mapInfoWindow.findViewById(R.id.title);
infoWindowDetails = (TextView) mapInfoWindow.findViewById(R.id.snippet);
infoWindowCount = (TextView) mapInfoWindow.findViewById(R.id.attenders_count);
}
@Override
public View getInfoWindow(Marker marker) {
return manageMarkerInfo(marker);
}
@Override
public View getInfoContents(Marker marker) {
Log.i(TAG, "Refresh");
refreshInfoWindow(marker);
return null;
}
@Override
public void onInfoWindowClick(Marker marker) {
MapHelper.clickInfoItem(getContext(), marker);
}
private View manageMarkerInfo(Marker marker){
if (marker.getTitle() == null || marker.getTitle().length() == 0 || marker.getTitle().equalsIgnoreCase("")) {
Log.i(TAG, "NO Info");
marker.hideInfoWindow();
return null;
} else{
Log.i(TAG, "Regular Info");
return selectMarker(marker);
}
}
private View selectMarker(final Marker marker) {
if (MapHelper.newSessionMarker != null || marker.getTitle().equalsIgnoreCase(mContext.getString(R.string.session_create))) {
infoWindowTitle.setText(marker.getTitle());
infoWindowDetails.setText(LocationHelper.getCountryAddressFromCoords(
marker.getPosition().latitude,
marker.getPosition().longitude));
infoWindowCount.setVisibility(View.INVISIBLE);
Glide.with(mContext)
.load(ParseUser.getCurrentUser().getString("user_image_url"))
.placeholder(R.drawable.add_session)
.bitmapTransform(new CropCircleTransformation(mContext))
.listener(new RequestListener<String, GlideDrawable>() {
@Override
public boolean onException(Exception e, String model, Target<GlideDrawable> target, boolean isFirstResource) {
Log.i(TAG, "Error loading Image");
return false;
}
@Override
public boolean onResourceReady(GlideDrawable resource, String model, Target<GlideDrawable> target,
boolean isFromMemoryCache, boolean isFirstResource) {
Log.i(TAG, "Success loading Image");
getInfoContents(marker);
return false;
}
})
.error(R.drawable.add_session)
.into(infoWindowIcon);
return mapInfoWindow;
} else{
SessionObject session = MapHelper.selectedSessionByUser;
infoWindowTitle.setText(session.getSessionMarker().getTitle());
infoWindowDetails.setText(LocationHelper.getCountryAddressFromCoords(
session.getSessionMarker().getPosition().latitude,
session.getSessionMarker().getPosition().longitude));
infoWindowCount.setVisibility(View.VISIBLE);
if (session.getAttendersCount() > 0) {
infoWindowCount.setText("" + session.getAttendersCount());
infoWindowCount.setVisibility(View.VISIBLE);
}
else {
infoWindowCount.setVisibility(View.INVISIBLE);
}
if (session != null) {
Log.d(TAG, "Select Session:");
Log.d(TAG, "Session Title: " + session.getSessionObject().getString("title"));
Log.d(TAG, "Session Image: " + session.getSessionObject().getString("session_image_url"));
Log.d(TAG, "Session GeoPoints: " + marker.getPosition().latitude + ", "
+ marker.getPosition().longitude);
Log.d(TAG, "Session Attenders:" + session.getAttendersCount());
if(session.getSessionObject().getString("address") != null &&
session.getSessionObject().getString("address").length() > 0){
infoWindowDetails.setText(session.getSessionObject().getString("address"));
}
int defaultIcon = Constants.sessionTypesList.get(session.getSessionObject().getInt("type")).getResources()[0];
try {
Glide.with(mContext)
.load(session.getSessionObject().getString("session_image_url"))
.placeholder(defaultIcon)
.bitmapTransform(new CropCircleTransformation(mContext))
.listener(new RequestListener<String, GlideDrawable>() {
@Override
public boolean onException(Exception e, String model, Target<GlideDrawable> target,
boolean isFirstResource) {
Log.i(TAG, "Error loading Image");
return false;
}
@Override
public boolean onResourceReady(GlideDrawable resource, String model, Target<GlideDrawable> target,
boolean isFromMemoryCache, boolean isFirstResource) {
Log.i(TAG, "Success loading Image");
getInfoContents(marker);
return false;
}
})
.error(defaultIcon)
.into(infoWindowIcon);
return mapInfoWindow;
} catch (Exception e1) {
e1.printStackTrace();
return mapInfoWindow;
}
}else{
return mapInfoWindow;
}
}
}
private void refreshInfoWindow(Marker marker){
if (marker != null && marker.isInfoWindowShown()) {
Log.i(TAG, "Success loading Image");
marker.hideInfoWindow();
marker.showInfoWindow();
}
}
private Context getContext() {
return mContext;
}
public SessionObject getSessionFromMarker(Marker marker) {
for (SessionObject session : ((SessionsActivity)getContext()).sessionsList) {
if (marker.getId().equals(session.getSessionMarker().getId())) {
return session;
}
}
return null;
}
}