Example usage for android.widget AdapterView getFirstVisiblePosition

Introduction

In this page you can find the example usage for android.widget AdapterView getFirstVisiblePosition.

Prototype

public int getFirstVisiblePosition() 

Source Link

Document

Returns the position within the adapter's data set for the first item displayed on screen.

Usage

From source file:Main.java

public static View getItemViewIfVisible(AdapterView<?> holder, int itemPos) {
    int firstPosition = holder.getFirstVisiblePosition();
    int wantedChild = itemPos - firstPosition;
    if (wantedChild < 0 || wantedChild >= holder.getChildCount())
        return null;
    return holder.getChildAt(wantedChild);
}

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From source file:com.czy.reecycleviewheader.ScrollableHelper.java

private static boolean isAdapterViewTop(AdapterView adapterView) {
    if (adapterView != null) {
        int firstVisiblePosition = adapterView.getFirstVisiblePosition();
        View childAt = adapterView.getChildAt(0);
        if (childAt == null || (firstVisiblePosition == 0 && childAt != null && childAt.getTop() == 0)) {
            return true;
        }/* w ww .  j a  v  a2s  .  co m*/
    }
    return false;
}

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From source file:com.recyclerviewpulldownrefresh.view.refresh.AbPullToRefreshView.java

/**
 * ??//from  ww  w  .j  a  v  a2 s  . co  m
 *
 * @return
 */
public boolean canChildScrollUp() {
    // ???
    if (!mEnablePullRefresh) {
        return false;
    }

    if (mTarget instanceof AdapterView<?>) {
        final AdapterView<?> absListView = (AdapterView<?>) mTarget;
        View child = absListView.getChildAt(0);
        if (child == null) {
            return true;
        }
        if (absListView.getFirstVisiblePosition() == 0 && child.getTop() == 0) {
            return true;
        }

        int top = child.getTop();
        int padding = absListView.getPaddingTop();
        if (absListView.getFirstVisiblePosition() == 0 && Math.abs(top - padding) <= 11) {
            return true;
        }
        return false;
    } else if (mTarget instanceof ScrollView) {
        return mScrollView.getScrollY() == 0;
    } else if (mTarget instanceof WebView) {
        WebView webView = (WebView) mTarget;
        if (webView != null) {
            return webView.getScrollY() == 0;
        }
        return false;
    } else if (mTarget instanceof RecyclerView) {
        int firstVisiblePosition = 0;

        RecyclerView.LayoutManager layoutManager = recyclerView.getLayoutManager();
        View childView = layoutManager.getChildAt(0);
        if (null == childView) {
            return true;
        }

        if (layoutManager instanceof LinearLayoutManager) {
            firstVisiblePosition = ((LinearLayoutManager) layoutManager).findFirstVisibleItemPosition();
        } else if (layoutManager instanceof GridLayoutManager) {
            firstVisiblePosition = ((GridLayoutManager) layoutManager).findFirstVisibleItemPosition();
        } else if (layoutManager instanceof StaggeredGridLayoutManager) {
            int[] spanPosition = new int[((StaggeredGridLayoutManager) layoutManager).getSpanCount()];
            ((StaggeredGridLayoutManager) layoutManager).findFirstVisibleItemPositions(spanPosition);
            firstVisiblePosition = getFirstVisibleItemPosition(spanPosition);
        }

        if (childView.getTop() == 0 && firstVisiblePosition == 0) {
            return true;
        }
        return false;
    } else {
        return ViewCompat.canScrollVertically(mTarget, 1);
    }
}

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From source file:org.mozilla.gecko.tests.BaseTest.java

/**
 * Gets the view in the tabs panel at the specified index.
 *
 * @return View at index// w  w w .  j  a va 2  s.c om
 */
private View getTabViewAt(final int index) {
    final View[] childView = { null };

    final AdapterView<ListAdapter> view = getTabsLayout();

    runOnUiThreadSync(new Runnable() {
        @Override
        public void run() {
            view.setSelection(index);

            // The selection isn't updated synchronously; posting a
            // runnable to the view's queue guarantees we'll run after the
            // layout pass.
            view.post(new Runnable() {
                @Override
                public void run() {
                    // getChildAt() is relative to the list of visible
                    // views, but our index is relative to all views in the
                    // list. Subtract the first visible list position for
                    // the correct offset.
                    childView[0] = view.getChildAt(index - view.getFirstVisiblePosition());
                }
            });
        }
    });

    boolean result = waitForCondition(new Condition() {
        @Override
        public boolean isSatisfied() {
            return childView[0] != null;
        }
    }, MAX_WAIT_MS);

    mAsserter.ok(result, "list item at index " + index + " exists", null);

    return childView[0];
}

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From source file:com.tweetlanes.android.core.view.TweetFeedFragment.java

private TwitterStatus getVisibleStatus() {

    TwitterStatus visibleStatus = null;/* www. jav  a2 s.  c  o  m*/

    if (getStatusFeed() != null && mTweetFeedListView != null
            && mTweetFeedListView.getRefreshableView() != null) {
        AdapterView view = mTweetFeedListView.getRefreshableView();
        int visiblePosition = view.getFirstVisiblePosition();

        if (visiblePosition == 1 && view != null && view.getChildAt(visiblePosition - 1) != null) {
            int previousTop = view.getChildAt(visiblePosition - 1).getTop();
            int previousBottom = view.getChildAt(visiblePosition - 1).getBottom();
            if (previousBottom > 0 && previousTop >= -10) {
                visiblePosition--;
            }
        }

        if (visiblePosition < getStatusFeed().getStatusCount()) {
            visibleStatus = getStatusFeed().getStatus(visiblePosition);
            if (visibleStatus != null) {
                String notifcationType = null;
                String pref = null;
                if (getLaneIndex() == getApp().getCurrentAccount()
                        .getCurrentLaneIndex(Constant.LaneType.USER_MENTIONS)) {

                    notifcationType = SharedPreferencesConstants.NOTIFICATION_TYPE_MENTION;
                    pref = SharedPreferencesConstants.NOTIFICATION_LAST_DISPLAYED_MENTION_ID;
                } else if (getLaneIndex() == getApp().getCurrentAccount()
                        .getCurrentLaneIndex(Constant.LaneType.DIRECT_MESSAGES)) {

                    notifcationType = SharedPreferencesConstants.NOTIFICATION_TYPE_DIRECT_MESSAGE;
                    pref = SharedPreferencesConstants.NOTIFICATION_LAST_DISPLAYED_DIRECT_MESSAGE_ID;
                }

                if (notifcationType != null && pref != null) {

                    Notifier.saveLastNotificationActioned(getBaseLaneActivity(),
                            getApp().getCurrentAccountKey(), notifcationType, visibleStatus.mId);
                    Notifier.cancel(getBaseLaneActivity(), getApp().getCurrentAccountKey(), notifcationType);

                }
            }
        }
    }

    return visibleStatus;
}

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