android - 变量点需要是final

Question

我收到一条错误消息，指出“变量‘point’是从内部类访问的，需要声明为最终的”。错误在最后一个“点”on.position

googleMap.setOnMapLongClickListener(new GoogleMap.OnMapLongClickListener() {

    @Override
    public void onMapLongClick(LatLng point) {
        googleMap.setOnMapLongClickListener(new GoogleMap.OnMapLongClickListener() {

            @Override
            public void onMapLongClick(LatLng point) {
                AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
                builder.setTitle("Title");

                // Set up the input
                final EditText input = new EditText(MainActivity.this);
                builder.setView(input);

                // Set up the buttons
                builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {@Override
                    public void onClick(DialogInterface dialog, int which) {
                        String text = input.getText().toString();
                        googleMap.addMarker(new MarkerOptions()
                            .position(point)
                            .title(text));
                    }
                });
            }
        });
    }
});
}

Answer 1

将点声明为final

@Override
public void onMapLongClick(final LatLng point) {