@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
if (mTabStrip.isIndicatorAlwaysInCenter() && getChildCount() > 0) {
int left = (w - mTabStrip.getChildMeasuredWidthAt(0)) / 2;
int right = (w - mTabStrip.getChildMeasuredWidthAt(getChildCount() - 1)) / 2;
setPadding(left, getPaddingTop(), right, getPaddingBottom());
setClipToPadding(false);
}
}
private void populateTabStrip() {
final PagerAdapter adapter = viewPager.getAdapter();
for (int i = 0; i < adapter.getCount(); i++) {
final View tabView =
(tabProvider == null)
? createDefaultTabView(adapter.getPageTitle(i))
: tabProvider.createTabView(tabStrip, i, adapter);
if (tabView == null) {
throw new IllegalStateException("tabView is null.");
}
if (distributeEvenly) {
LinearLayout.LayoutParams lp = (LinearLayout.LayoutParams) tabView.getLayoutParams();
lp.width = 0;
lp.weight = 1;
}
if (internalTabClickListener != null) {
tabView.setOnClickListener(internalTabClickListener);
}
tabStrip.addView(tabView);
if (i == viewPager.getCurrentItem()) {
tabView.setSelected(true);
}
}
}
/**
* Sets the associated view pager. Note that the assumption here is that the pager content (number
* of tabs and tab titles) does not change after this call has been made.
*/
public void setViewPager(ViewPager viewPager) {
tabStrip.removeAllViews();
this.viewPager = viewPager;
if (viewPager != null && viewPager.getAdapter() != null) {
viewPager.addOnPageChangeListener(new InternalViewPagerListener());
populateTabStrip();
}
}
/**
* Sets the associated view pager. Note that the assumption here is that the pager content (number
* of tabs and tab titles) does not change after this call has been made.
*/
public void setViewPager(ViewPager viewPager) {
mTabStrip.removeAllViews();
mViewPager = viewPager;
if (viewPager != null) {
viewPager.setOnPageChangeListener(new InternalViewPagerListener());
populateTabStrip();
}
}
private void scrollToTab(int tabIndex, int positionOffset) {
final int tabStripChildCount = mTabStrip.getChildCount();
if (tabStripChildCount == 0 || tabIndex < 0 || tabIndex >= tabStripChildCount) {
return;
}
View selectedChild = mTabStrip.getChildAt(tabIndex);
if (selectedChild != null) {
int targetScrollX = selectedChild.getLeft() + positionOffset;
if (mTabStrip.isIndicatorAlwaysInCenter()) {
targetScrollX -= (mTabStrip.getChildWidthAt(0) - selectedChild.getWidth()) / 2;
} else if (tabIndex > 0 || positionOffset > 0) {
// If we're not at the first child and are mid-scroll, make sure we obey the offset
targetScrollX -= mTitleOffset;
}
scrollTo(targetScrollX, 0);
}
}
private void populateTabStrip() {
final PagerAdapter adapter = mViewPager.getAdapter();
final OnClickListener tabClickListener = new TabClickListener();
final LayoutInflater inflater = LayoutInflater.from(getContext());
for (int i = 0; i < adapter.getCount(); i++) {
View tabView = null;
TextView tabTitleView = null;
if (mTabViewLayoutId != NO_ID) {
// If there is a custom tab view layout id set, try and inflate it
tabView = inflater.inflate(mTabViewLayoutId, mTabStrip, false);
}
if (mTabViewTextViewId != NO_ID && tabView != null) {
tabTitleView = (TextView) tabView.findViewById(mTabViewTextViewId);
}
if (tabView == null) {
tabView = createDefaultTabView(getContext());
}
if (tabTitleView == null && TextView.class.isInstance(tabView)) {
tabTitleView = (TextView) tabView;
}
if (tabTitleView == null) {
throw new IllegalStateException("tabTitleView not found.");
}
if (mDistributeEvenly) {
LinearLayout.LayoutParams lp = (LinearLayout.LayoutParams) tabView.getLayoutParams();
lp.width = 0;
lp.weight = 1;
}
tabTitleView.setText(adapter.getPageTitle(i));
tabView.setOnClickListener(tabClickListener);
mTabStrip.addView(tabView);
if (i == mViewPager.getCurrentItem()) {
tabView.setSelected(true);
}
}
}
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
if (tabStrip.isIndicatorAlwaysInCenter() && tabStrip.getChildCount() > 0) {
View firstTab = tabStrip.getChildAt(0);
View lastTab = tabStrip.getChildAt(getChildCount() - 1);
int start = (w - Utils.getMeasuredWidth(firstTab)) / 2 - Utils.getMarginStart(firstTab);
int end = (w - Utils.getMeasuredWidth(lastTab)) / 2 - Utils.getMarginEnd(lastTab);
tabStrip.setMinimumWidth(tabStrip.getMeasuredWidth());
ViewCompat.setPaddingRelative(this, start, getPaddingTop(), end, getPaddingBottom());
setClipToPadding(false);
}
}
public SmartTabLayout(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
// Disable the Scroll Bar
setHorizontalScrollBarEnabled(false);
final DisplayMetrics dm = getResources().getDisplayMetrics();
final float density = dm.density;
int tabBackgroundResId = NO_ID;
boolean textAllCaps = TAB_VIEW_TEXT_ALL_CAPS;
ColorStateList textColors;
float textSize =
TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP, TAB_VIEW_TEXT_SIZE_SP, dm);
int textHorizontalPadding = (int) (TAB_VIEW_PADDING_DIPS * density);
int textMinWidth = (int) (TAB_VIEW_TEXT_MIN_WIDTH * density);
boolean distributeEvenly = DEFAULT_DISTRIBUTE_EVENLY;
int customTabLayoutId = NO_ID;
int customTabTextViewId = NO_ID;
boolean clickable = TAB_CLICKABLE;
int titleOffset = (int) (TITLE_OFFSET_DIPS * density);
TypedArray a =
context.obtainStyledAttributes(attrs, R.styleable.stl_SmartTabLayout, defStyle, 0);
tabBackgroundResId =
a.getResourceId(
R.styleable.stl_SmartTabLayout_stl_defaultTabBackground, tabBackgroundResId);
textAllCaps =
a.getBoolean(R.styleable.stl_SmartTabLayout_stl_defaultTabTextAllCaps, textAllCaps);
textColors = a.getColorStateList(R.styleable.stl_SmartTabLayout_stl_defaultTabTextColor);
textSize = a.getDimension(R.styleable.stl_SmartTabLayout_stl_defaultTabTextSize, textSize);
textHorizontalPadding =
a.getDimensionPixelSize(
R.styleable.stl_SmartTabLayout_stl_defaultTabTextHorizontalPadding,
textHorizontalPadding);
textMinWidth =
a.getDimensionPixelSize(
R.styleable.stl_SmartTabLayout_stl_defaultTabTextMinWidth, textMinWidth);
customTabLayoutId =
a.getResourceId(
R.styleable.stl_SmartTabLayout_stl_customTabTextLayoutId, customTabLayoutId);
customTabTextViewId =
a.getResourceId(
R.styleable.stl_SmartTabLayout_stl_customTabTextViewId, customTabTextViewId);
distributeEvenly =
a.getBoolean(R.styleable.stl_SmartTabLayout_stl_distributeEvenly, distributeEvenly);
clickable = a.getBoolean(R.styleable.stl_SmartTabLayout_stl_clickable, clickable);
titleOffset = a.getLayoutDimension(R.styleable.stl_SmartTabLayout_stl_titleOffset, titleOffset);
a.recycle();
this.titleOffset = titleOffset;
this.tabViewBackgroundResId = tabBackgroundResId;
this.tabViewTextAllCaps = textAllCaps;
this.tabViewTextColors =
(textColors != null) ? textColors : ColorStateList.valueOf(TAB_VIEW_TEXT_COLOR);
this.tabViewTextSize = textSize;
this.tabViewTextHorizontalPadding = textHorizontalPadding;
this.tabViewTextMinWidth = textMinWidth;
this.internalTabClickListener = clickable ? new InternalTabClickListener() : null;
this.distributeEvenly = distributeEvenly;
if (customTabLayoutId != NO_ID) {
setCustomTabView(customTabLayoutId, customTabTextViewId);
}
this.tabStrip = new SmartTabStrip(context, attrs);
if (distributeEvenly && tabStrip.isIndicatorAlwaysInCenter()) {
throw new UnsupportedOperationException(
"'distributeEvenly' and 'indicatorAlwaysInCenter' both use does not support");
}
// Make sure that the Tab Strips fills this View
setFillViewport(!tabStrip.isIndicatorAlwaysInCenter());
addView(tabStrip, LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
}
private void scrollToTab(int tabIndex, float positionOffset) {
final int tabStripChildCount = tabStrip.getChildCount();
if (tabStripChildCount == 0 || tabIndex < 0 || tabIndex >= tabStripChildCount) {
return;
}
final boolean isLayoutRtl = Utils.isLayoutRtl(this);
View selectedTab = tabStrip.getChildAt(tabIndex);
int widthPlusMargin = Utils.getWidth(selectedTab) + Utils.getMarginHorizontally(selectedTab);
int extraOffset = (int) (positionOffset * widthPlusMargin);
if (tabStrip.isIndicatorAlwaysInCenter()) {
if (0f < positionOffset && positionOffset < 1f) {
View nextTab = tabStrip.getChildAt(tabIndex + 1);
int selectHalfWidth = Utils.getWidth(selectedTab) / 2 + Utils.getMarginEnd(selectedTab);
int nextHalfWidth = Utils.getWidth(nextTab) / 2 + Utils.getMarginStart(nextTab);
extraOffset = Math.round(positionOffset * (selectHalfWidth + nextHalfWidth));
}
View firstTab = tabStrip.getChildAt(0);
int x;
if (isLayoutRtl) {
int first = Utils.getWidth(firstTab) + Utils.getMarginEnd(firstTab);
int selected = Utils.getWidth(selectedTab) + Utils.getMarginEnd(selectedTab);
x = Utils.getEnd(selectedTab) - Utils.getMarginEnd(selectedTab) - extraOffset;
x -= (first - selected) / 2;
} else {
int first = Utils.getWidth(firstTab) + Utils.getMarginStart(firstTab);
int selected = Utils.getWidth(selectedTab) + Utils.getMarginStart(selectedTab);
x = Utils.getStart(selectedTab) - Utils.getMarginStart(selectedTab) + extraOffset;
x -= (first - selected) / 2;
}
scrollTo(x, 0);
return;
}
int x;
if (titleOffset == TITLE_OFFSET_AUTO_CENTER) {
if (0f < positionOffset && positionOffset < 1f) {
View nextTab = tabStrip.getChildAt(tabIndex + 1);
int selectHalfWidth = Utils.getWidth(selectedTab) / 2 + Utils.getMarginEnd(selectedTab);
int nextHalfWidth = Utils.getWidth(nextTab) / 2 + Utils.getMarginStart(nextTab);
extraOffset = Math.round(positionOffset * (selectHalfWidth + nextHalfWidth));
}
if (isLayoutRtl) {
x = -Utils.getWidthWithMargin(selectedTab) / 2 + getWidth() / 2;
} else {
x = Utils.getWidthWithMargin(selectedTab) / 2 - getWidth() / 2;
}
} else {
if (isLayoutRtl) {
x = (tabIndex > 0 || positionOffset > 0) ? titleOffset : 0;
} else {
x = (tabIndex > 0 || positionOffset > 0) ? -titleOffset : 0;
}
}
int start = Utils.getStart(selectedTab);
int startMargin = Utils.getMarginStart(selectedTab);
if (isLayoutRtl) {
x += start + startMargin - extraOffset - getWidth() + Utils.getPaddingHorizontally(this);
} else {
x += start - startMargin + extraOffset;
}
scrollTo(x, 0);
}
/**
* Returns the view at the specified position in the tabs.
*
* @param position the position at which to get the view from
* @return the view at the specified position or null if the position does not exist within the
* tabs
*/
public View getTabAt(int position) {
return tabStrip.getChildAt(position);
}
/**
* Sets the colors to be used for tab dividers. These colors are treated as a circular array.
* Providing one color will mean that all tabs are indicated with the same color.
*/
public void setDividerColors(int... colors) {
tabStrip.setDividerColors(colors);
}
/**
* Sets the colors to be used for indicating the selected tab. These colors are treated as a
* circular array. Providing one color will mean that all tabs are indicated with the same color.
*/
public void setSelectedIndicatorColors(int... colors) {
tabStrip.setSelectedIndicatorColors(colors);
}
/**
* Set the custom {@link TabColorizer} to be used.
*
* <p>If you only require simple customisation then you can use {@link
* #setSelectedIndicatorColors(int...)} and {@link #setDividerColors(int...)} to achieve similar
* effects.
*/
public void setCustomTabColorizer(TabColorizer tabColorizer) {
tabStrip.setCustomTabColorizer(tabColorizer);
}
/**
* Set the behavior of the Indicator scrolling feedback.
*
* @param interpolator {@link com.ogaclejapan.smarttablayout.SmartTabIndicationInterpolator}
*/
public void setIndicationInterpolator(SmartTabIndicationInterpolator interpolator) {
tabStrip.setIndicationInterpolator(interpolator);
}
public SmartTabLayout(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
// Disable the Scroll Bar
setHorizontalScrollBarEnabled(false);
// Make sure that the Tab Strips fills this View
setFillViewport(true);
setOverScrollMode(OVER_SCROLL_NEVER);
final DisplayMetrics dm = getResources().getDisplayMetrics();
final float density = dm.density;
boolean textAllCaps = TAB_VIEW_TEXT_ALL_CAPS;
int textColor = TAB_VIEW_TEXT_COLOR;
float textSize =
TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP, TAB_VIEW_TEXT_SIZE_SP, dm);
int textHorizontalPadding = (int) (TAB_VIEW_PADDING_DIPS * density);
int textMinWidth = (int) (TAB_VIEW_TEXT_MIN_WIDTH * density);
boolean distributeEvenly = DEFAULT_DISTRIBUTE_EVENLY;
int textLayoutId = NO_ID;
int textViewId = NO_ID;
TypedArray a =
context.obtainStyledAttributes(attrs, R.styleable.stl_SmartTabLayout, defStyle, 0);
textAllCaps =
a.getBoolean(R.styleable.stl_SmartTabLayout_stl_defaultTabTextAllCaps, textAllCaps);
textColor = a.getColor(R.styleable.stl_SmartTabLayout_stl_defaultTabTextColor, textColor);
textSize = a.getDimension(R.styleable.stl_SmartTabLayout_stl_defaultTabTextSize, textSize);
textHorizontalPadding =
a.getDimensionPixelSize(
R.styleable.stl_SmartTabLayout_stl_defaultTabTextHorizontalPadding,
textHorizontalPadding);
textMinWidth =
a.getDimensionPixelSize(
R.styleable.stl_SmartTabLayout_stl_defaultTabTextMinWidth, textMinWidth);
textLayoutId =
a.getResourceId(R.styleable.stl_SmartTabLayout_stl_customTabTextLayoutId, textLayoutId);
textViewId =
a.getResourceId(R.styleable.stl_SmartTabLayout_stl_customTabTextViewId, textViewId);
distributeEvenly =
a.getBoolean(R.styleable.stl_SmartTabLayout_stl_distributeEvenly, distributeEvenly);
a.recycle();
mTitleOffset = (int) (TITLE_OFFSET_DIPS * density);
mTabViewTextAllCaps = textAllCaps;
mTabViewTextColor = textColor;
mTabViewTextSize = textSize;
mTabViewTextHorizontalPadding = textHorizontalPadding;
mTabViewTextMinWidth = textMinWidth;
mTabViewLayoutId = textLayoutId;
mTabViewTextViewId = textViewId;
mDistributeEvenly = distributeEvenly;
mTabStrip = new SmartTabStrip(context, attrs);
if (distributeEvenly && mTabStrip.isIndicatorAlwaysInCenter()) {
throw new UnsupportedOperationException(
"'distributeEvenly' and 'indicatorAlwaysInCenter' both use does not support");
}
addView(mTabStrip, LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
}
