java - 安卓/Java : Waiting until closure has completed running

Question

我在 Android 应用程序中进行一些异步编程时遇到了问题。我在 ClientLocation 类中有一些代码可以获取用户的纬度/经度，但是一旦获得它们，我需要将它们传递给函数。单步执行代码时，我可以看到 repository.getDeals 调用是在输入 gotLocation 闭包之前运行的。

这是重要的代码:

...
this.repository = Repository.getInstance();
ClientLocation.LocationResult locationResult = new ClientLocation.LocationResult() {
    @Override
    public void gotLocation(Location location) {
        userLatitude = Double.toString(location.getLatitude());
        userLongitude = Double.toString(location.getLongitude());
    }
};
ClientLocation clientLocation = new ClientLocation();
clientLocation.getLocation(getApplication().getApplicationContext(), locationResult);
// I need the latitude and longitude values at this point in order to properly call getDeals
// currently when this is called the userLat/lon values are 0.0 because gotLocation didn't run yet
deals = repository.getDeals(searchQuery, maxDistInKm, userLatitude, userLongitude);

在 gotLocation 完成运行之前不会调用 getDeals 的模式是什么？异步编程新手，欢迎任何其他提示!

Answer 1

这里:

boolean isFinished  = false

 Thread {

     this.repository = Repository.getInstance();
     ClientLocation.LocationResult locationResult = new 
     ClientLocation.LocationResult() {
     @Override
     public void gotLocation(Location location) {
     userLatitude = Double.toString(location.getLatitude());
     userLongitude = Double.toString(location.getLongitude());
         isFinished = true
     }
   };



    while(true){

      if(isFinished ) break:
    }
   ClientLocation clientLocation = new ClientLocation()
   clientLocation.getLocation(getApplication().getApplicationContext(), locationResult);
    deals = repository.getDeals(searchQuery, maxDistInKm, 
    userLatitude, userLongitude);

    Thread.currentThread().interrupt()

}