Question

我需要获取用户位置并将该位置的请求发送到服务器。我有一个用于显示服务器数据的recyclerview。为了更新位置，我在主要活动的onStart中使用此代码，并希望在recyclerview的空闲状态下获取位置。现在我不知道如何实现位置监听器。

维护活动：

if(ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED){
        ActivityCompat.requestPermissions(MainActivity.this,  new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, 1);
    }else{
        locationManager.requestLocationUpdates(locationManager.GPS_PROVIDER, 10000, 0, locationListener);

    }

和：

public abstract class StoryPaginationScrollListener extends RecyclerView.OnScrollListener{

LinearLayoutManager layoutManager;
LocationListener locationListener;
Context context;


public StoryPaginationScrollListener(LinearLayoutManager layoutManager, LocationListener locationListener, Context context) {
    this.layoutManager = layoutManager;
    this.locationListener = locationListener;
    this.context = context;
}


@Override
public void onScrollStateChanged(@NonNull RecyclerView recyclerView, int newState) {
    super.onScrollStateChanged(recyclerView, newState);

    if(newState == SCROLL_STATE_IDLE){

    }
}

@Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
    super.onScrolled(recyclerView, dx, dy);

    int visibleItemCount = layoutManager.getChildCount();
    int totalItemCount = layoutManager.getItemCount();
    int firstVisibleItemPosition = layoutManager.findFirstVisibleItemPosition();





    if (!isLoading() && !isLastPage()) {
        }
        if ((visibleItemCount + firstVisibleItemPosition) >= totalItemCount && firstVisibleItemPosition >= 0) {
            loadMoreItems();
        }
    }
}



protected abstract void loadMoreItems();

public abstract int getTotalPageCount();

public abstract boolean isLastPage();

public abstract boolean isLoading();


}

在这种情况下需要一个位置：if(newState == SCROLL_STATE_IDLE)，并在loadMoreItems（）中使用此位置。

Answer 1

尝试实施LocationListener 像这样

class MyActivity extends Activity implements LocationsListener{
    public Location location

    @Override
    public void onLocationChanged(Location location) {
        this.location = location
    }

    public void someLogic(){
        new RecyclerView.OnScrollListener(){
        @Override
        public void onScrollStateChanged(@NonNull RecyclerView recyclerView, int newState) {
            super.onScrollStateChanged(recyclerView, newState);
            if(newState == SCROLL_STATE_IDLE){
                if(location != null){
                    //write your code here
                }
            }

        }

        @Override
        public void onScrolled(@NonNull RecyclerView recyclerView, int dx, int dy) {
            super.onScrolled(recyclerView, dx, dy);
        }
    };
    }

在RecyclerView.OnScrollListener中使用locationlistener

1 个答案: