public void notifyDataSetChanged() {
mTabLayout.removeAllViews();
PagerAdapter adapter = mViewPager.getAdapter();
IconPagerAdapter iconAdapter = null;
if (adapter instanceof IconPagerAdapter) {
iconAdapter = (IconPagerAdapter) adapter;
}
final int count = adapter.getCount();
for (int i = 0; i < count; i++) {
CharSequence title = adapter.getPageTitle(i);
if (title == null) {
title = EMPTY_TITLE;
}
int iconResId = 0;
if (iconAdapter != null) {
iconResId = iconAdapter.getIconResId(i);
}
addTab(i, title, iconResId);
}
if (mSelectedTabIndex > count) {
mSelectedTabIndex = count - 1;
}
setCurrentItem(mSelectedTabIndex);
requestLayout();
}
@Override
public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
final int widthMode = MeasureSpec.getMode(widthMeasureSpec);
final boolean lockedExpanded = widthMode == MeasureSpec.EXACTLY;
setFillViewport(lockedExpanded);
final int childCount = mTabLayout.getChildCount();
if (childCount > 1 && (widthMode == MeasureSpec.EXACTLY || widthMode == MeasureSpec.AT_MOST)) {
if (childCount > 2) {
// mMaxTabWidth = (int)(MeasureSpec.getSize(widthMeasureSpec) * 0.4f);
} else {
mMaxTabWidth = MeasureSpec.getSize(widthMeasureSpec) / 2;
}
} else {
mMaxTabWidth = -1;
}
final int oldWidth = getMeasuredWidth();
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
final int newWidth = getMeasuredWidth();
if (lockedExpanded && oldWidth != newWidth) {
// Recenter the tab display if we're at a new (scrollable) size.
setCurrentItem(mSelectedTabIndex);
}
}
public void notifyDataSetChanged() {
mIconsLayout.removeAllViews();
com.viewpagerindicator.IconPagerAdapter iconAdapter =
(com.viewpagerindicator.IconPagerAdapter) mViewPager.getAdapter();
int count = iconAdapter.getCount();
for (int i = 0; i < count; i++) {
ImageView view = new ImageView(getContext(), null, R.attr.vpiIconPageIndicatorStyle);
view.setImageResource(iconAdapter.getIconResId(i));
mIconsLayout.addView(view);
}
if (mSelectedIndex > count) {
mSelectedIndex = count - 1;
}
setCurrentItem(mSelectedIndex);
requestLayout();
}
@Override
public void setCurrentItem(int item) {
if (mViewPager == null) {
throw new IllegalStateException("ViewPager has not been bound.");
}
mSelectedTabIndex = item;
mViewPager.setCurrentItem(item);
final int tabCount = mTabLayout.getChildCount();
for (int i = 0; i < tabCount; i++) {
final View child = mTabLayout.getChildAt(i);
final boolean isSelected = (i == item);
child.setSelected(isSelected);
if (isSelected) {
animateToTab(item);
}
}
}
private void addTab(int index, CharSequence text, int iconResId) {
final TabView tabView = new TabView(getContext());
tabView.mIndex = index;
tabView.setFocusable(true);
tabView.setOnClickListener(mTabClickListener);
tabView.setText(text);
if (iconResId != 0) {
tabView.setCompoundDrawablesWithIntrinsicBounds(iconResId, 0, 0, 0);
}
mTabLayout.addView(tabView, new LinearLayout.LayoutParams(0, MATCH_PARENT, 1));
}
private void animateToTab(final int position) {
final View tabView = mTabLayout.getChildAt(position);
if (mTabSelector != null) {
removeCallbacks(mTabSelector);
}
mTabSelector =
new Runnable() {
public void run() {
final int scrollPos = tabView.getLeft() - (getWidth() - tabView.getWidth()) / 2;
smoothScrollTo(scrollPos, 0);
mTabSelector = null;
}
};
post(mTabSelector);
}
private void animateToIcon(final int position) {
final View iconView = mIconsLayout.getChildAt(position);
if (mIconSelector != null) {
removeCallbacks(mIconSelector);
}
mIconSelector =
new Runnable() {
public void run() {
final int scrollPos = iconView.getLeft() - (getWidth() - iconView.getWidth()) / 2;
smoothScrollTo(scrollPos, 0);
mIconSelector = null;
}
};
post(mIconSelector);
}
