java - GoogleMaps v2 Android 的我的位置按钮，不显示

Question

我正在使用谷歌地图做一个应用程序，但是当我尝试添加“我的位置”按钮时，正如引用所说的那样不起作用......

我就是这样做的:

protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        map = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map)).getMap();

        locManager = (LocationManager)getSystemService(LOCATION_SERVICE);
        providersList = locManager.getAllProviders();
        provider =locManager.getProvider(providersList.get(0));
        precision = provider.getAccuracy();
        req = new Criteria();
        req.setAccuracy(Criteria.ACCURACY_FINE);        
        inside = false;

        map.getUiSettings().setMyLocationButtonEnabled(true);

        buildPolygon();
        drawPolygon();
        startLocalization();
    }

我使用 map.getUiSettings().setMyLocationButtonEnabled(true); 如google的引用所示。不知道怎么回事。。

Answer 1

myLocationButtonEnabled 默认为 true，并在 setMyLocationEnabled 层启用时显示。

试试这个:

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    map = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map)).getMap();

    // Add this line
    map.setMyLocationEnabled(true);

    locManager = (LocationManager)getSystemService(LOCATION_SERVICE);
    providersList = locManager.getAllProviders();
    provider =locManager.getProvider(providersList.get(0));
    precision = provider.getAccuracy();
    req = new Criteria();
    req.setAccuracy(Criteria.ACCURACY_FINE);        
    inside = false;

    //map.getUiSettings().setMyLocationButtonEnabled(true);

    buildPolygon();
    drawPolygon();
    startLocalization();
}

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setMyLocationEnabled Documentation
setMyLocationButtonEnabled Documentation