小编Kid*_*PAP的帖子

在我将 getMap() 更改为 getMapAsync() 并实现 OnMapReadyCallback 后，我收到错误 NullPointerException。

这里是 logcat

引起：java.lang.NullPointerException：尝试在 pym.example.com.fypv2.callme.Callme 的空对象引用上调用虚拟方法“void com.google.android.gms.maps.GoogleMap.setMyLocationEnabled(boolean)” .onCreate(Callme.java:117)`

这里的代码

SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
        .findFragmentById(R.id.map);
mapFragment.getMapAsync(this);

// Enabling MyLocation in Google Map
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
    // TODO: Consider calling
    //    ActivityCompat#requestPermissions
    // here to request the missing permissions, and then overriding
    //   public void onRequestPermissionsResult(int requestCode, String[] permissions,
    //                                          int[] grantResults)
    // to handle the case where the user grants the permission. See the documentation …