Android:在不选择项目的情况下停止画廊滚动

Question

我目前正在使用画廊 View ，在 onFling 期间它会快速滚动。我的问题是我已经设置了每个项目的 onClick 以将您带到新 Activity 。但我只希望在图库当前未滚动时才起作用。如果图库正在滚动，我希望第一次点击时在当前位置停止滚动。

谁能分享让我检查图库滚动状态的代码，或者可以停止滚动操作的自定义图库代码？

谢谢，乔希

Answer 1

我想这个答案有点晚了，但这是对这个问题的回应，我刚刚修复它并想与遇到同样问题的任何人分享......

public class CustomGallery extends Gallery {
public CustomGallery(Context context) {
   super(context);
}

public CustomGallery(Context context, AttributeSet attrs) {
   super(context, attrs);
}
public CustomGallery(Context context, AttributeSet attrs, int defStyle) {
   super(context, attrs, defStyle);
}
    //In case you might want the gallery to start from left(another known issue...)
public void alignToLeft(Activity activity) {
    super.onAttachedToWindow();
    DisplayMetrics display = new DisplayMetrics();
    activity.getWindowManager().getDefaultDisplay().getMetrics(display);
    // start the images from the left...
    int scrollTo = (int) (display.widthPixels - getPixelsFromDIP(display,POSTER_WIDTH_DIP) - 2 * getPixelsFromDIP(display, 5));

    MarginLayoutParams margins = (MarginLayoutParams)getLayoutParams();
    MarginLayoutParams.class.cast(this.getLayoutParams()).setMargins(-scrollTo + margins.leftMargin, margins.topMargin, margins.rightMargin, margins.bottomMargin);
}

private int getPixelsFromDIP(DisplayMetrics display, int dps){
    return (int)(dps * display.scaledDensity + 0.5F);
}

    //Override single tap up, to prevent propagation of the event, and force
    //the listener to push the event calculating position from X,Y coords
private OnItemClickListener listener;
@Override
public boolean onSingleTapUp(MotionEvent e) {
    if(listener != null){
        listener.onItemClick(null, this, pointToPosition((int) e.getX(), (int) e.getY()), 0x0345);
    }else{
        return super.onSingleTapUp(e);
    }
    return false;
}

    //Override the method to assign our custom item listener...
@Override
public void setOnItemClickListener(
        android.widget.AdapterView.OnItemClickListener listener) {
    this.listener = listener;
}}

现在您所要做的就是，将图库用作常规组件，为其分配 OnItemClickListener，您将在不滚动的情况下获得项目的位置...

final CustomGallery customGallery = (CustomGallery)personDetailView.findViewById(R.id.customGallery);
            customGallery(this);
            customGallery(castCrewAdapter);
            customGallery(new OnItemClickListener() {

                @Override
                public void onItemClick(AdapterView<?> arg0, View arg1,
                        int position, long arg3) {
                    android.util.Log.e("customGallery TAG", "Item clicked: " + position);
                }
            });