Question

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    //在加载布局之前获取所需权限
    addpermission();
    Environment.setLicensePath(sdcard + "/YN_BGDC/license/");
    Environment.initialization(this);
    setContentView(R.layout.activity_main);

    DatasourceConnectionInfo info = new DatasourceConnectionInfo();
    info.setAlias("TianDiTu1");
    info.setEngineType(EngineType.OGC);
    info.setDriver("WMTS");

    String url = "https://t0.tianditu.gov.cn/img_c/wmts?tk=493052acd769f94413bb19a27879476b";
    info.setServer(url);
    m_workspace = new Workspace();
    Datasource datasource = m_workspace.getDatasources().open(info);
    m_mapControl = m_mapView.getMapControl();
    m_mapControl.getMap().getLayers().add(datasource.getDatasets().get(0), true);
}

报错     Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'com.supermap.mapping.MapControl com.supermap.mapping.MapView.getMapControl()' on a null object reference

Answer 1

您好，您那边有初始化控件mapView吗？建议您那边参考帮助文档--开发指南里面的入门程序配置一个简单的二维程序。