试图制作地图

Question

 private void setUpMapIfNeeded() {
    // Do a null check to confirm that we have not already instantiated the map.
    if (mMap == null) {
        // Try to obtain the map from the SupportMapFragment.
        mMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map))
                .getMap();
        // Check if we were successful in obtaining the map.
        if (mMap != null) {
            setUpMap();
        }
    }
}

“由于一些奇怪的原因，说.getmap（）的区域无法正常工作。任何人都可以提供帮助。”

Answer 1

尝试删除.getmap（）部分并改为使用getMapAsync（）。

private void setUpMapIfNeeded() {
    // Do a null check to confirm that we have not already instantiated the map.
    if (mMap == null) {
        // Try to obtain the map from the SupportMapFragment.
        mMap =((SupportMapFragment)getSupportFragmentManager().findFragmentById(R.id.map));
        mapFragment.getMapAsync(this);
        // Check if we were successful in obtaining the map.
        if (mMap != null) {
            setUpMap();
        }
    }
}