标签:android android-fragments google-maps android-adapter android-viewholder
如何从RecyclerView.ViewHolder访问GoogleMap
我有:
public class MapRowHolder extends RecyclerView.ViewHolder
{
public MapRowHolder(View view) {
super(view);
}
}
XML:
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:android.support.v7.cardview="http://schemas.android.com/apk/res-auto"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android.support.v7.cardview:cardBackgroundColor="@color/blue"
android.support.v7.cardview:cardCornerRadius="@dimen/card_corner"
android.support.v7.cardview:cardElevation="@dimen/card_elevation">
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_gravity="right|center_vertical"
android:gravity="center_vertical|right"
android:layout_width="fill_parent">
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="250dp"
android:tag="maps"
android:id="@+id/map_view_fragment" tools:context=".Map"
android:name="com.google.android.gms.maps.SupportMapFragment"
android:layout_centerInParent="true"/>
</LinearLayout>
适配器:
public class MapAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder>
{
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
RecyclerView.ViewHolder mh;
View v = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.map_row, viewGroup, false);
mh = (RecyclerView.ViewHolder)new PodatkiZaMapRowHolder(v);
return mh;
}
public void onBindViewHolder(RecyclerView.ViewHolder RowHolder, int polozaj) {
MapRowHolder mapRowHolder = (MapRowHolder)RowHolder;
}
}
它正确显示地图.它缩小到整个地球.并定位于中心0,0.
如何获取地图片段(在ViewHolder中)?我想将相机移动到其他位置(我可以在获取GoogleMap对象后执行此操作)我应该如何以及在何处获取GoogleMap对象?
如果我使用MapView而不是map fragment它可以工作,但不刷新地图.点击地图几次后,地图会刷新.
此致,Ales
解决方法:
我最终的目的是动态地将SupportMapFragment添加到项目布局内的FrameLayout.您只需要创建具有唯一ID的其他FrameLayout.
XML:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="10dp">
<TextView
android:id="@+id/car_name"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Peugeot 407 2.0 HDI"
android:textSize="20dp"
android:gravity="center_horizontal"
android:textColor="?attr/colorPrimary"
android:textStyle="bold"
android:layout_marginBottom="5dp"
/>
<include layout="@layout/ride_item_summary" />
<FrameLayout
android:id="@+id/map_layout"
android:layout_marginTop="10dp"
android:layout_width="match_parent"
android:layout_height="170dp"
android:layout_marginBottom="10dp"
/>
</LinearLayout>
适配器:
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
super.onBindViewHolder(holder, position);
switch (getItemViewType(position)) {
case 1:
if (first) {
... //check if polyline is not null, init other views
FrameLayout view = (FrameLayout) ((RideItemHolder) holder).mMapLayout;
FrameLayout frame = new FrameLayout(mContext);
frame.setId(1010101); //you have to set unique id
int height = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 170, mContext.getResources().getDisplayMetrics());
FrameLayout.LayoutParams layoutParams = new FrameLayout.LayoutParams(FrameLayout.LayoutParams.MATCH_PARENT, height);
frame.setLayoutParams(layoutParams);
view.addView(frame);
GoogleMapOptions options = new GoogleMapOptions();
options.liteMode(true);
SupportMapFragment mapFrag = SupportMapFragment.newInstance(options);
//Create the the class that implements OnMapReadyCallback and set up your map
mapFrag.getMapAsync(new MapReadyCallback());
FragmentManager fm = fragment.getChildFragmentManager();
fm.beginTransaction().add(frame.getId(), mapFrag).commit();
first = false;
}
}
break;
case 2:
...
private class MapReadyCallback implements OnMapReadyCallback {
@Override
public void onMapReady(GoogleMap googleMap) {
drawMap(googleMap);
}
}
标签:android,android-fragments,google-maps,android-adapter,android-viewholder 来源: https://codeday.me/bug/20190519/1138324.html
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