使用Mapbox Android SDK绘制圆形红色标记

可以通过以下步骤实现：

首先，确保已经在Android项目中集成了Mapbox Android SDK。可以在项目的build.gradle文件中添加以下依赖项：

implementation 'com.mapbox.mapboxsdk:mapbox-android-sdk:10.2.0'

在布局文件中添加一个MapView控件，用于显示地图。例如，在activity_main.xml文件中添加以下代码：

<com.mapbox.mapboxsdk.maps.MapView
    android:id="@+id/mapView"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />

在MainActivity.java文件中，初始化Mapbox SDK并设置地图样式。在onCreate方法中添加以下代码：

import com.mapbox.mapboxsdk.Mapbox;
import com.mapbox.mapboxsdk.maps.MapView;
import com.mapbox.mapboxsdk.maps.Style;
import com.mapbox.mapboxsdk.geometry.LatLng;
import com.mapbox.mapboxsdk.plugins.annotation.Circle;
import com.mapbox.mapboxsdk.plugins.annotation.CircleManager;
import com.mapbox.mapboxsdk.plugins.annotation.CircleOptions;

public class MainActivity extends AppCompatActivity {
    private MapView mapView;
    private CircleManager circleManager;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        Mapbox.getInstance(this, "YOUR_MAPBOX_ACCESS_TOKEN");
        setContentView(R.layout.activity_main);

        mapView = findViewById(R.id.mapView);
        mapView.onCreate(savedInstanceState);
        mapView.getMapAsync(mapboxMap -> {
            mapboxMap.setStyle(Style.MAPBOX_STREETS, style -> {
                circleManager = new CircleManager(mapView, mapboxMap, style);
                addCircleMarker(new LatLng(40.7128, -74.0060), 1000); // 添加圆形标记
            });
        });
    }

    private void addCircleMarker(LatLng latLng, float radius) {
        CircleOptions circleOptions = new CircleOptions()
                .withLatLng(latLng)
                .withCircleColor(Color.parseColor("#FF0000"))
                .withCircleRadius(radius);
        circleManager.create(circleOptions);
    }

    @Override
    protected void onStart() {
        super.onStart();
        mapView.onStart();
    }

    @Override
    protected void onResume() {
        super.onResume();
        mapView.onResume();
    }

    @Override
    protected void onPause() {
        super.onPause();
        mapView.onPause();
    }

    @Override
    protected void onStop() {
        super.onStop();
        mapView.onStop();
    }

    @Override
    protected void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        mapView.onSaveInstanceState(outState);
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        mapView.onDestroy();
    }

    @Override
    public void onLowMemory() {
        super.onLowMemory();
        mapView.onLowMemory();
    }
}