java - 如何使用函数变量的值更新实例变量?
问题描述
过去几个月我刚开始在 android studio 中编程,我一直在想,我可以用函数中的变量值更新实例变量的值吗?为了更清楚地说明这一点
JAVA代码
public class MapsActivity extends AppCompatActivity implements OnMapReadyCallback {
private FusedLocationProviderClient fusedLocationProviderClient;
double latitudine, longitudine;
Location currentLocation;
Location newLocation;
Task location1 = fusedLocationProviderClient.getLastLocation();
location1.addOnCompleteListener(new OnCompleteListener() {
@Override
public void onComplete(@NonNull Task task) {
if (task.isSuccessful()) {
currentLocation = (Location) task.getResult();
Toast.makeText(MapsActivity.this,""+currentLocation.getLatitude(),
Toast.LENGTH_LONG).show();
Toast.makeText(MapsActivity.this,""+currentLocation.getLongitude(),
Toast.LENGTH_LONG).show();
newLocation = currentLocation ;
}else{
Toast.makeText(MapsActivity.this,"no way",Toast.LENGTH_LONG).show();
}
}
});
我只是想在我的项目的其他一些地方使用存储在 currentLocation 中的值,但我该怎么做呢?