Android 标记不起作用

Question

我的记号笔不起作用。我不知道为什么。标记在 onMapReady method.Works 中没有任何作用 onCreate.But 它正在运行 else 。它的打印 "hata1" 和 "hata2"。当我创建新项目时，不会从 /sdk/extras/../google_play/services 导入。我得到 "cannot find file /settings.jar" error.So 我也不想要新项目。

import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.support.v4.app.FragmentActivity;
import android.os.Bundle;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.MapFragment;
import com.google.android.gms.maps.OnMapReadyCallback;
import com.google.android.gms.maps.SupportMapFragment;
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 java.util.*;
import android.os.Bundle;
import com.google.android.*;
import android.graphics.*;
import android.view.View;
import android.widget.Toast;


public class MapsActivity extends FragmentActivity implements OnMapReadyCallback{

    private GoogleMap myMap;


    public static final LatLng PERTH = new LatLng(36.57, 36.17);
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_maps);

        Toast.makeText(getApplicationContext(),"hata1",Toast.LENGTH_SHORT).show();
        if(myMap!=null) {
            Marker marker = myMap.addMarker(new MarkerOptions()
                    .position(PERTH)
                    .title("Marker").visible(true));
            marker.showInfoWindow();

            myMap.moveCamera(CameraUpdateFactory.newLatLngZoom(PERTH, 13));
        }
        else
        {
            Toast.makeText(getApplicationContext(),"hata2",Toast.LENGTH_SHORT).show();
        }

    }


    @Override


    public void onMapReady(GoogleMap myMap) {

    }

}

Answer 1

public class MapsActivity extends FragmentActivity implements OnMapReadyCallback{

private GoogleMap myMap;


public static final LatLng PERTH = new LatLng(36.57, 36.17);
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_maps);
    getHandleOnMap();
}
private void getHandleOnMap()
{
    SupportMapFragment mapFragment = (SupportMapFragment) this.getChildFragmentManager()
            .findFragmentById(R.id.mapFragment);
    mapFragment.getMapAsync(this);
}
@Override
public void onMapReady(GoogleMap myMap) {
googleMap.addMarker(new MarkerOptions()
            .position(PERTH)
            .title("Hello"));
}

}

如果您遇到任何崩溃或错误，请分享详细的日志

Answer 2

你可以这样试试吗？因为 onMapReady() 一旦您的 GoogleMap 准备就绪，您就会自动获得 GoogleMap 对象进行处理。

public class MapsActivity extends FragmentActivity implements OnMapReadyCallback{

private GoogleMap myMap;

public static final LatLng PERTH = new LatLng(36.57, 36.17);
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_maps);

    MapFragment mapFragment = (MapFragment) getFragmentManager()
            .findFragmentById(R.id.map);
    mapFragment.getMapAsync(this);
}


@Override
public void onMapReady(GoogleMap myMap) {
    Toast.makeText(getApplicationContext(),"hata1",Toast.LENGTH_SHORT).show();
    if(myMap!=null) {
        Marker marker = myMap.addMarker(new MarkerOptions()
                .position(PERTH)
                .title("Marker").visible(true));
        marker.showInfoWindow();

        myMap.moveCamera(CameraUpdateFactory.newLatLngZoom(PERTH, 13));
    }
    else
    {
        Toast.makeText(getApplicationContext(),"hata2",Toast.LENGTH_SHORT).show();
    }
}
}

Android 标记不起作用

Android Marker does not work

android

google-maps

marker