listView自动加载问题

这个是public class DropDownListView extends ListView implements OnScrollListener {
private boolean isDropDownStyle = true;
private boolean isOnBottomStyle = true;
private boolean isAutoLoadOnBottom = false;
private String headerDefaultText;
private String headerPullText;
private String headerReleaseText;
private String headerLoadingText;
private String footerDefaultText;
private String footerLoadingText;
private String footerNoMoreText;

private Context context;

/** header layout view **/
private RelativeLayout headerLayout;
private ImageView headerImage;
private ProgressBar headerProgressBar;
private TextView headerText;
private TextView headerSecondText;

/** footer layout view **/
private RelativeLayout footerLayout;
private ProgressBar footerProgressBar;
private Button footerButton;

private OnDropDownListener onDropDownListener;
private OnScrollListener onScrollListener;

private float headerPaddingTopRate = 1.5f;
/** min distance which header can release to loading **/
private int headerReleaseMinDistance;
private boolean hasMore = true; private boolean isShowFooterProgressBar = true; private boolean isShowFooterWhenNoMore = false;

private int currentScrollState;
private int currentHeaderStatus;

private boolean hasReachedTop = false;

private RotateAnimation flipAnimation;
/** image reverse flip animation **/
private RotateAnimation reverseFlipAnimation;

private int headerOriginalHeight;

private int headerOriginalTopPadding;

private float actionDownPointY;

/** whether is on bottom loading **/
private boolean isOnBottomLoading = false; public DropDownListView(Context context){
    super(context);
    init(context);
}

public DropDownListView(Context context, AttributeSet attrs){
    super(context, attrs);
    getAttrs(context, attrs);
    init(context);
}

public DropDownListView(Context context, AttributeSet attrs, int defStyle){
    super(context, attrs, defStyle);
    getAttrs(context, attrs);
    init(context);
}

private void init(Context context) {
    this.context = context;
    initDropDownStyle();
    initOnBottomStyle();

    // should set, to run onScroll method and so on
    super.setOnScrollListener(this);
}

/**
* init drop down style, only init once
*/
private void initDropDownStyle() {
    if (headerLayout != null) {
        if (isDropDownStyle) {
            addHeaderView(headerLayout);
        } else {
            removeHeaderView(headerLayout);
        }
        return;
    }
    if (!isDropDownStyle) {
        return;
    }

    headerReleaseMinDistance = context.getResources()
                                      .getDimensionPixelSize(R.dimen.drop_down_list_header_release_min_distance);
    flipAnimation = new RotateAnimation(0, 180, RotateAnimation.RELATIVE_TO_SELF, 0.5f,
                                        RotateAnimation.RELATIVE_TO_SELF, 0.5f);
    flipAnimation.setInterpolator(new LinearInterpolator());
    flipAnimation.setDuration(250);
    flipAnimation.setFillAfter(true);
    reverseFlipAnimation = new RotateAnimation(-180, 0, RotateAnimation.RELATIVE_TO_SELF, 0.5f,
                                               RotateAnimation.RELATIVE_TO_SELF, 0.5f);
    reverseFlipAnimation.setInterpolator(new LinearInterpolator());
    reverseFlipAnimation.setDuration(250);
    reverseFlipAnimation.setFillAfter(true);

    headerDefaultText = context.getString(R.string.drop_down_list_header_default_text);
    headerPullText = context.getString(R.string.drop_down_list_header_pull_text);
    headerReleaseText = context.getString(R.string.drop_down_list_header_release_text);
    headerLoadingText = context.getString(R.string.drop_down_list_header_loading_text);

    LayoutInflater inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    headerLayout = (RelativeLayout)inflater.inflate(R.layout.drop_down_list_header, this, false);
    headerText = (TextView)headerLayout.findViewById(R.id.drop_down_list_header_default_text);
    headerImage = (ImageView)headerLayout.findViewById(R.id.drop_down_list_header_image);
    headerProgressBar = (ProgressBar)headerLayout.findViewById(R.id.drop_down_list_header_progress_bar);
    headerSecondText = (TextView)headerLayout.findViewById(R.id.drop_down_list_header_second_text);
    headerLayout.setClickable(true);
    headerLayout.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            onDropDown();
        }
    });
    headerText.setText(headerDefaultText);
    addHeaderView(headerLayout);

    measureHeaderLayout(headerLayout);
    headerOriginalHeight = headerLayout.getMeasuredHeight();
    headerOriginalTopPadding = headerLayout.getPaddingTop();
    currentHeaderStatus = HEADER_STATUS_CLICK_TO_LOAD;
}

/**
* init on bottom style, only init once
*/
private void initOnBottomStyle() {
    if (footerLayout != null) {
        if (isOnBottomStyle) {
            addFooterView(footerLayout);
        } else {
            removeFooterView(footerLayout);
        }
        return;
    }
    if (!isOnBottomStyle) {
        return;
    }

    footerDefaultText = context.getString(R.string.drop_down_list_footer_default_text);
    footerLoadingText = context.getString(R.string.drop_down_list_footer_loading_text);
    footerNoMoreText = context.getString(R.string.drop_down_list_footer_no_more_text);

    LayoutInflater inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    footerLayout = (RelativeLayout)inflater.inflate(R.layout.drop_down_list_footer, this, false);
    footerButton = (Button)footerLayout.findViewById(R.id.drop_down_list_footer_button);
    footerButton.setDrawingCacheBackgroundColor(0);
    footerButton.setEnabled(true);

    footerProgressBar = (ProgressBar)footerLayout.findViewById(R.id.drop_down_list_footer_progress_bar);
    addFooterView(footerLayout);
}

/**
* @return isDropDownStyle
*/
public boolean isDropDownStyle() {
    return isDropDownStyle;
}

/**
* @param isDropDownStyle
*/
public void setDropDownStyle(boolean isDropDownStyle) {
    if (this.isDropDownStyle != isDropDownStyle) {
        this.isDropDownStyle = isDropDownStyle;
        initDropDownStyle();
    }
}

/**
* @return isOnBottomStyle
*/
public boolean isOnBottomStyle() {
    return isOnBottomStyle;
}

/**
* @param isOnBottomStyle
*/
public void setOnBottomStyle(boolean isOnBottomStyle) {
    if (this.isOnBottomStyle != isOnBottomStyle) {
        this.isOnBottomStyle = isOnBottomStyle;
        initOnBottomStyle();
    }
}

/**
* @return isAutoLoadOnBottom
*/
public boolean isAutoLoadOnBottom() {
    return isAutoLoadOnBottom;
}

/**
* set whether auto load when on bottom
*
* @param isAutoLoadOnBottom
*/
public void setAutoLoadOnBottom(boolean isAutoLoadOnBottom) {
    this.isAutoLoadOnBottom = isAutoLoadOnBottom;
}

/**
* get whether show footer loading progress bar when loading
*
* @return the isShowFooterProgressBar
*/
public boolean isShowFooterProgressBar() {
    return isShowFooterProgressBar;
}

/**
* set whether show footer loading progress bar when loading
*
* @param isShowFooterProgressBar
*/
public void setShowFooterProgressBar(boolean isShowFooterProgressBar) {
    this.isShowFooterProgressBar = isShowFooterProgressBar;
}

/**
* get isShowFooterWhenNoMore
*
* @return the isShowFooterWhenNoMore
*/
public boolean isShowFooterWhenNoMore() {
    return isShowFooterWhenNoMore;
}

/**
* set isShowFooterWhenNoMore
*
* @param isShowFooterWhenNoMore the isShowFooterWhenNoMore to set
*/
public void setShowFooterWhenNoMore(boolean isShowFooterWhenNoMore) {
    this.isShowFooterWhenNoMore = isShowFooterWhenNoMore;
}

/**
* get footer button
*
* @return
*/
public Button getFooterButton() {
    return footerButton;
}

@Override
public void setAdapter(ListAdapter adapter) {
    super.setAdapter(adapter);
    if (isDropDownStyle) {
        setSecondPositionVisible();
    }
}

@Override
public void setOnScrollListener(AbsListView.OnScrollListener listener) {
    onScrollListener = listener;
}

/**
* @param onDropDownListener
*/
public void setOnDropDownListener(OnDropDownListener onDropDownListener) {
    this.onDropDownListener = onDropDownListener;
}

/**
* @param onBottomListener
*/
public void setOnBottomListener(OnClickListener onBottomListener) {
    footerButton.setOnClickListener(onBottomListener);
}

@Override
public boolean onTouchEvent(MotionEvent event) {
    if (!isDropDownStyle) {
        return super.onTouchEvent(event);
    }

    hasReachedTop = false;
    switch (event.getAction()) {
        case MotionEvent.ACTION_DOWN:
            actionDownPointY = event.getY();
            break;
        case MotionEvent.ACTION_MOVE:
            adjustHeaderPadding(event);
            break;
        case MotionEvent.ACTION_UP:
            if (!isVerticalScrollBarEnabled()) {
                setVerticalScrollBarEnabled(true);
            }
            if (getFirstVisiblePosition() == 0 && currentHeaderStatus != HEADER_STATUS_LOADING) {
                switch (currentHeaderStatus) {
                    case HEADER_STATUS_RELEASE_TO_LOAD:
                        onDropDown();
                        break;
                    case HEADER_STATUS_DROP_DOWN_TO_LOAD:
                        setHeaderStatusClickToLoad();
                        setSecondPositionVisible();
                        break;
                    case HEADER_STATUS_CLICK_TO_LOAD:
                    default:
                        break;
                }
            }
            break;
    }
    return super.onTouchEvent(event);
}

调试易

listView自动加载问题

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