如何在导航抽屉活动中添加谷歌地图？

Question

Problem with this, This code is also not working..

public class MainActivity extends AppCompatActivity
        implements NavigationView.OnNavigationItemSelectedListener


mapView = (MapView)findViewById(R.id.map);


    mapView.onCreate(savedInstanceState);
    mapView.getMapAsync(new OnMapReadyCallback() {
        @Override
        public void onMapReady(GoogleMap googleMap) {
            googleMap.addMarker(new MarkerOptions()
                    .position(new LatLng(37.7750, 122.4183))
                    .title("San Francisco")
                    .snippet("Population: 776733"));
        }
    });

Answer 1

I found a solution today.

1. Implement OnMapReadyCallback to MainActivity .

    public class MainActivity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener, OnMapReadyCallback { // ... }

2. Implement onMapReady() . Keep it empty.

    @Override public void onMapReady(GoogleMap googleMap) { }

3. In onCreate() method:

    SupportMapFragment supportMapFragment = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map); supportMapFragment.getMapAsync(this);

Answer 2

You are mixing up two processes. You have to change either in your xml or activity class code:

1) Either replace your map fragment in content_main.xml with the MapView (As Below):

 <com.google.android.gms.maps.MapView
    android:id="@+id/map"
    android:layout_width="match_parent"
    android:layout_height="match_parent"/>

2) Or replace this:

mapView = (MapView)findViewById(R.id.map);

mapView.onCreate(savedInstanceState);
mapView.getMapAsync(new OnMapReadyCallback() {
    @Override
    public void onMapReady(GoogleMap googleMap) {
        googleMap.addMarker(new MarkerOptions()
                .position(new LatLng(37.7750, 122.4183))
                .title("San Francisco")
                .snippet("Population: 776733"));
    }
});

With:

 ((SupportMapFragment) getSupportFragmentManager()
            .findFragmentById(R.id.map)).getMapAsync(new OnMapReadyCallback() {

  @Override
  public void onMapReady(GoogleMap googleMap) {

       googleMap.addMarker(new MarkerOptions()
           .position(new LatLng(37.7750, 122.4183))
           .title("San Francisco")
           .snippet("Population: 776733"));
   }

}

In your MainActivity class.

In your existing code, You have added a map fragment to the layout but calling for a mapview from activity. That's why it is not working.

To get API key, go HERE and Generate a key.

Copy the key and paste it in manifest under application tag:

<meta-data
        android:name="com.google.android.geo.API_KEY"
        android:value="YOUR_API_KEY"/>

Now the google map will show up.

Answer 3

first you have to create the relative_layout because we can't add anything in map fragment so we add image button and map fragment in relative_layout.




 <?xml version="1.0" encoding="utf-8"?>
    <android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        xmlns:tools="http://schemas.android.com/tools"
        android:id="@+id/drawer_layout"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:fitsSystemWindows="true"
        tools:openDrawer="start">

        <include
            layout="@layout/activity_maps"
            android:layout_width="match_parent"
            android:layout_height="match_parent" />

        <android.support.design.widget.NavigationView
            android:id="@+id/nav_view"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:layout_gravity="start"
            android:fitsSystemWindows="true"
            app:headerLayout="@layout/nav_header_main"
            app:menu="@menu/activity_main_drawer_drawer" />

    </android.support.v4.widget.DrawerLayout>

here your drawer_layout

`<?xml version="1.0" encoding="utf-8"?>
    <android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        xmlns:tools="http://schemas.android.com/tools"
        android:id="@+id/drawer_layout"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:fitsSystemWindows="true"
        tools:openDrawer="start">

        <include
            layout="@layout/activity_maps"
            android:layout_width="match_parent"
            android:layout_height="match_parent" />

        <android.support.design.widget.NavigationView
            android:id="@+id/nav_view"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:layout_gravity="start"
            android:fitsSystemWindows="true"
            app:headerLayout="@layout/nav_header_main"
            app:menu="@menu/activity_main_drawer_drawer" />

    </android.support.v4.widget.DrawerLayout>`

in MapActivity add implements method navigationView and then add this code below the getSupportedFragment

` DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
           NavigationView  navigationView = (NavigationView) findViewById(R.id.nav_view);`

then write the onclick method on Imagebutton method which is ` public void

drawerclick(View view) {


            drawer.openDrawer(Gravity.START);
    enter code here

            navigationView.setNavigationItemSelectedListener(this);

        }`