从片段切换到地图片段会留下黑屏

google-maps android java android-fragments supportmapfragment

2022-09-04 02:22:54

我已将全屏地图片段添加到我的三个选项卡式片段之一。除了我在选项卡之间切换时遇到的问题外，一切都很顺利。

每次我从带有地图的片段切换到其他片段之一时，我都会得到一个黑屏，大约0.2秒。这似乎与使用地图片段的活动滚动的问题类似。

我曾尝试按照其他人的建议在地图顶部添加透明视图，但这无济于事。

这是我的xml：

<FrameLayout 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"
    tools:context=".ParkMapFragment">

    <fragment
        android:id="@+id/fullParkMap"
        android:name="com.google.android.gms.maps.SupportMapFragment"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />
</FrameLayout>

这是我的代码：

public class ParkMapFragment extends Fragment {
    public ParkMapFragment() {
        // Required empty public constructor
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        return inflater.inflate(R.layout.fragment_map, container, false);
    }

    @Override
    public void onStart(){
        super.onStart();

        getActivity().setTitle("Map");
    }

    @Override
    public void onDestroyView() {
        super.onDestroyView();
        SupportMapFragment mapFragment = (SupportMapFragment) getFragmentManager().findFragmentById(R.id.fullParkMap);
        if (mapFragment != null) {
            getFragmentManager().beginTransaction().remove(mapFragment).commit();
        }
    }
}

有人有什么建议吗？

答案 1

检查视图是否为 null，如果不是，则将其从其父视图中删除。这样，您将不会看到黑屏。

请尝试以下代码。

片段：

import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.GoogleMap.OnMapClickListener;
import com.google.android.gms.maps.GoogleMap.OnMarkerClickListener;
import com.google.android.gms.maps.model.BitmapDescriptorFactory;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.Marker;
import com.google.android.gms.maps.model.MarkerOptions;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.view.InflateException;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

public class ExhibhitionMap2  extends Fragment implements OnMapClickListener,OnMarkerClickListener{

    View v;
    private  GoogleMap mMap;
    FragmentManager fragmentManager;

     @Override
     public View onCreateView(LayoutInflater inflater, ViewGroup container,
             Bundle savedInstanceState) {

    //   android = inflater.inflate(R.layout.activity_exhibhition_map, container, false);

         if (v != null) {
                ViewGroup parent = (ViewGroup) v.getParent();
                if (parent != null)
                    parent.removeView(v);
            }
            try {
                 v = inflater.inflate(R.layout.activity_exhibhition_map, container, false);
            } catch (InflateException e) {
                /* map is already there, just return view as it is */
            }

         setUpMapIfNeeded();        
         return v;
     }

     /***** Sets up the map if it is possible to do so *****/
        public  void setUpMapIfNeeded() {
            // Do a null check to confirm that we have not already instantiated the map.
            if (mMap == null) {


                mMap = ((SupportMapFragment) this.getChildFragmentManager().findFragmentById(R.id.map2)).getMap();

                // Check if we were successful in obtaining the map.
                if (mMap != null)
                {
                    mMap.setOnMapClickListener(this);
                    mMap.setOnMarkerClickListener((OnMarkerClickListener) this);

                     MarkerOptions marker = new MarkerOptions().position(new LatLng(36.011513,-115.174853))
                             .icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_BLUE))
                             .title("P-1");

                     MarkerOptions marker01 = new MarkerOptions().position(new LatLng(36.111513,-115.204853))
                             .icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_BLUE))
                             .title("P-2");

                     MarkerOptions marker02 = new MarkerOptions().position(new LatLng(36.051513,-115.154853))
                             .icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_BLUE))
                             .title("P-3");


                     MarkerOptions marker03 = new MarkerOptions().position(new LatLng(36.057513,-115.344853))
                             .icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_BLUE))
                             .title("P-4");

                     MarkerOptions marker1 = new MarkerOptions().position(new LatLng(36.081513,-115.224853))
                             .icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_CYAN))
                             .title("F-1");

                     MarkerOptions marker2 = new MarkerOptions().position(new LatLng(36.051513,-115.334853))
                             .icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_CYAN))
                             .title("F-2");

                     MarkerOptions marker3 = new MarkerOptions().position(new LatLng(36.101513,-115.124853))
                             .icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_CYAN))
                             .title("F-1");

                     MarkerOptions marker4 = new MarkerOptions().position(new LatLng(36.031513,-115.154853))
                             .icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_CYAN))
                             .title("F-2");

                     MarkerOptions marker5 = new MarkerOptions().position(new LatLng(36.081513,-115.194853))
                             .icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_CYAN))
                             .title("F-2");


                     mMap.addMarker(marker);
                     mMap.addMarker(marker01);
                     mMap.addMarker(marker02);
                     mMap.addMarker(marker03);

                     mMap.addMarker(marker1);
                     mMap.addMarker(marker2);
                     mMap.addMarker(marker3);
                     mMap.addMarker(marker4);

                     mMap.animateCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(36.051513,-115.174853), 10.0f));

                }

            }
        }

    @Override
    public boolean onMarkerClick(Marker marker) {

        /*Toast.makeText(getActivity(),
                  "" + marker.getTitle(), Toast.LENGTH_LONG)
                  .show();*/

        marker.showInfoWindow();

        return false;
    }

    @Override
    public void onMapClick(LatLng arg0) {
        // TODO Auto-generated method stub

    }

    public void onDestroy() {
        super.onDestroy();
    }

}

XML：

<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"
    tools:context="com.istride.mmps.ContactActivity" >



    <RelativeLayout
        android:id="@+id/relativeLayout1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/tableLayout1"
        android:visibility="gone"
        android:layout_margin="10dp" >

        <TextView
            android:id="@+id/tv_Title"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center_vertical"
            android:text="Bharati Vidyapeeth University's"
            android:textColor="@color/black_text_color"
            android:textSize="@dimen/Large_Size" />

        <TextView
            android:id="@+id/tv"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center_vertical"
             android:layout_below="@+id/tv_Title"
            android:text="Department of Information Technology and Management "
            android:textColor="@color/black_text_color"
            android:textSize="@dimen/small_size" />

        <View
            android:id="@+id/view2"
            android:layout_width="fill_parent"
            android:layout_height="2dp"
            android:layout_below="@+id/tv"
            android:layout_marginTop="10dp"
            android:background="@color/blue_background" />

         <RelativeLayout
        android:id="@+id/relative"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/view2"
         android:layout_marginTop="10dp"
        android:background="@color/gray_home">

        <TextView
            android:id="@+id/textVi1"
            android:layout_width="90dp"
            android:layout_height="wrap_content"
            android:layout_alignBottom="@+id/tv_add"
            android:layout_alignParentTop="true"
            android:background="@color/blue_background"
            android:paddingBottom="2dp"
            android:paddingLeft="8dp"
            android:paddingRight="13dp"
            android:paddingTop="2dp"
            android:gravity="center_vertical"

            android:text="ADDRESS "
            android:textColor="@color/white_text_color"
            android:textSize="@dimen/Medium_size"
            android:textStyle="bold" />

        <TextView
            android:id="@+id/tv_add"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentRight="true"
            android:layout_alignParentTop="true"
            android:layout_marginLeft="10dp"
            android:layout_toRightOf="@+id/textVi1"
            android:paddingBottom="2dp"
            android:paddingTop="2dp"
            android:text="2nd Floor, Architecture Building, Bharati Vidyapeeth Campus, Dhankawadi, Pune-411043"
            android:textColor="@color/black_text_color"
            android:textSize="@dimen/Medium_size" />

        </RelativeLayout>

         <RelativeLayout
        android:id="@+id/relativeLayout_call"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/relative"
         android:layout_marginTop="10dp"
        android:background="@color/gray_home">

        <TextView
            android:id="@+id/textView1"
            android:layout_width="90dp"
            android:layout_height="wrap_content"
            android:layout_alignBottom="@+id/tv_school_office_num"
            android:layout_alignParentTop="true"
            android:background="@color/blue_background"
            android:paddingBottom="2dp"
            android:paddingLeft="8dp"
            android:paddingRight="13dp"
            android:paddingTop="2dp"
            android:text="PHONE "
            android:gravity="center_vertical"
            android:textColor="@color/white_text_color"
            android:textSize="@dimen/Medium_size"
            android:textStyle="bold" />

        <TextView
            android:id="@+id/tv_school_office_num"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
        android:gravity="center_vertical"
            android:layout_alignParentTop="true"
            android:layout_marginLeft="10dp"
            android:layout_marginRight="5dp"
            android:layout_toRightOf="@+id/textView1"

            android:layout_toLeftOf="@+id/imageView2"
             android:textColor="@color/black_text_color"
              android:paddingTop="2dp"
               android:textSize="@dimen/Medium_size"
        android:paddingBottom="2dp"
            android:text="+91 989898989 asasa asas asasas ass  sdsd asas asas ass assas asas ass "  />

        <ImageView
            android:id="@+id/imageView2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentRight="true"
            android:layout_centerVertical="true"
            android:layout_marginRight="3dp"
            android:src="@drawable/ic_call" />
        </RelativeLayout>

         <RelativeLayout
        android:id="@+id/relativeLayout_Email"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/relativeLayout_call"
         android:layout_marginTop="10dp"
        android:background="@color/gray_home">

        <TextView
            android:id="@+id/tex1"
            android:layout_width="90dp"
            android:layout_height="wrap_content"
            android:layout_alignBottom="@+id/imageView1"
            android:layout_alignParentTop="true"
            android:background="@color/blue_background"
            android:gravity="center_vertical"
            android:paddingBottom="2dp"
            android:paddingLeft="8dp"
            android:paddingRight="13dp"
            android:paddingTop="2dp"
            android:text="EMAIL  "
            android:textColor="@color/white_text_color"
            android:textSize="@dimen/Medium_size"
            android:textStyle="bold" />

        <TextView
            android:id="@+id/tv_school_office_email"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
              android:layout_alignBottom="@+id/imageView1"
            android:layout_alignParentTop="true"
            android:layout_marginLeft="10dp"
             android:gravity="center_vertical"
            android:layout_toRightOf="@+id/tex1"
             android:textColor="@color/black_text_color"
              android:paddingTop="2dp"
        android:paddingBottom="2dp"
         android:textSize="@dimen/Medium_size"
            android:text="principal.mmei@eternalmewar.in" />

        <ImageView
            android:id="@+id/imageView1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentRight="true"
            android:layout_centerVertical="true"
            android:layout_marginRight="3dp"
            android:src="@drawable/ic_email" />

        </RelativeLayout>





    </RelativeLayout>
 <fragment
             android:id="@+id/map2"
             android:layout_width="fill_parent"
             android:layout_height="fill_parent"

             android:layout_alignParentRight="true"

             android:layout_marginTop="10dp"
             class="com.google.android.gms.maps.SupportMapFragment"
             android:background="@color/gray_color"
             android:paddingBottom="5dp"
             android:layout_above="@+id/footer"
             android:textSize="@dimen/small_size" />

   <RelativeLayout
        android:id="@+id/footer"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" 
         android:layout_alignParentBottom="true"
         android:layout_marginBottom="10dp"
        android:layout_alignParentLeft="true"
        android:layout_alignParentRight="true" >


 <TextView
        android:id="@+id/blue"
        android:layout_width="20dp"
        android:layout_height="20dp"

        android:background="#0000FF"
        android:gravity="center"
        android:layout_margin="10dp"

        android:textColor="@color/black_text_color"
        android:textSize="@dimen/small_size"
        android:textStyle="bold" />

 <TextView
        android:id="@+id/parking"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
      android:layout_toRightOf="@+id/blue"
        android:layout_alignTop="@+id/blue"
         android:layout_alignBottom="@+id/blue"
         android:gravity="center_vertical"
      android:text="Parking"
        android:textColor="@color/black_text_color"
        android:textSize="@dimen/Medium_size"
        android:textStyle="bold" />


  <TextView
        android:id="@+id/cyc"
        android:layout_width="20dp"
        android:layout_height="20dp"

        android:background="#00FFFF"
        android:gravity="center"
        android:layout_margin="10dp"
        android:layout_toRightOf="@+id/parking"
        android:textColor="@color/black_text_color"
        android:textSize="@dimen/small_size"
        android:textStyle="bold" />

 <TextView
        android:id="@+id/footer2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
      android:layout_toRightOf="@+id/cyc"
        android:layout_alignTop="@+id/cyc"
         android:layout_alignBottom="@+id/cyc"
         android:gravity="center_vertical"
      android:text="Food"
        android:textColor="@color/black_text_color"
        android:textSize="@dimen/Medium_size"
        android:textStyle="bold" />



</RelativeLayout>
</RelativeLayout>

答案 2

   @Override
public void onDestroyView() {
    super.onDestroyView();
    SupportMapFragment mapFragment = (SupportMapFragment) getFragmentManager().findFragmentById(R.id.fullParkMap);
    if (mapFragment != null) {
        getFragmentManager().beginTransaction().remove(mapFragment).commit();
    }
}

在这里，您正在删除片段而不替换它。我会使用 .replace 代替一个新的片段。

像这样：

getFragmentManager().beginTransaction().replace(R.id.your_placeholder, new CustomFragment(), "cstmFragID").commit();