希望能像volley一样可以取消某个链接

[yhsj0919]

很多时候网络请求会引起空指针等异常，希望能在关闭activity的时候同时取消当前页面的请求

[wyouflf]

添加自定义Callback, 由Callback决定是否取消链接:

public abstract class BindingPageCallback
implements Callback.CommonCallback, Callback.Cancelable {

    private boolean cancelled = false;
    private final WeakReference<Object> pageRef;

    public BindingPageCallback(Object page) {
        this.pageRef = new WeakReference<Object>(page);
    }

    @Override
    public void cancel() {
        cancelled = true;
    }

    @Override
    public boolean isCancelled() {
        if (cancelled) {
            return true;
        } else {
            Object page = pageRef.get();
            if (page == null) {
                return true;
            }

            if (page instanceof Activity) {
                return ((Activity) page).isFinishing();
            } else if (page instanceof Fragment/* v4? */) {
                return ((Fragment) page).isDetached();
            } else {
                .....
            }
        }

        return false;
    }
}

[Kerwin92]

@wyouflf ,您好，这个抽象类在哪儿继承使用呢？自己没想出来，求指教

[TuWei1992]

@wyouflf 我想在onError的时候取消这个request应该怎么处理?

[yuyongxue]

学习了