java - 将按钮放在 google map API 的右上角

Question

这个问题已经有答案了:

Android, How to create option Menu (11 个回答)

已关闭 6 年前。

我无法弄清楚如何在 Google map Activity 的屏幕右上角放置按钮 我是 Android 开发新手，无法找到有关如何执行此操作的直接说明。我的主要 Activity 代码如下所示:

import android.os.Bundle;
        import android.support.v7.app.AppCompatActivity;

        import com.google.android.gms.maps.CameraUpdateFactory;
        import com.google.android.gms.maps.GoogleMap;
        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.LatLngBounds;
        import com.google.android.gms.maps.model.MarkerOptions;

public class MapsActivity extends AppCompatActivity implements OnMapReadyCallback {
    private final LatLng LOWER_WEST_BOUND = new LatLng(45.427882, 13.347119);
    private final LatLng UPPER_EAST_BOUND = new LatLng(46.904552, 16.664808);
    private final LatLng LJUBLJANA = new LatLng(46.052771, 14.503602);
    private final LatLngBounds SLOVENIJA_OUTER_BOUNDS = new LatLngBounds(LOWER_WEST_BOUND, UPPER_EAST_BOUND);

    private GoogleMap mMap;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_maps);

        // Obtain the SupportMapFragment and get notified when the map is ready to be used.
        SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
                .findFragmentById(R.id.map);
        mapFragment.getMapAsync(this);
    }


    /**
     * Manipulates the map once available.
     * This callback is triggered when the map is ready to be used.
     * This is where we can add markers or lines, add listeners or move the camera. In this case,
     * we just add a marker near Sydney, Australia.
     * If Google Play services is not installed on the device, the user will be prompted to install
     * it inside the SupportMapFragment. This method will only be triggered once the user has
     * installed Google Play services and returned to the app.
     */
    @Override
    public void onMapReady(GoogleMap googleMap) {
        mMap = googleMap;

        mMap.setLatLngBoundsForCameraTarget(SLOVENIJA_OUTER_BOUNDS);
        mMap.addMarker(new MarkerOptions().position(LJUBLJANA).title("Marker in Ljubljana"));
        mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(LJUBLJANA, 15));
    }

}

所需的应用外观:

/image/n2FXF.png

我的 .xml 文件如下所示:

<fragment xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:map="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/map"
    tools:context="com.fri.studentskaprehrana.MapsActivity"
    android:name="com.google.android.gms.maps.SupportMapFragment"
    tools:layout="@layout/place_autocomplete_fragment" />

Answer 1

要放置图标的位置位于操作栏中。要将菜单项放置在那里，请参阅 the menu docs

对于菜单，请尝试:

<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">

    <item
        android:id="@+id/action_button"
        android:icon="@drawable/buttonIcon"
        app:showAsAction="always"
        android:title="Button title" />
</menu>