我正在使用Google的SlidingTabLayout类。我的问题是，在我使用选项卡的活动中，在更改选项卡时会有平滑过渡。但是，如果我在Fragment中切换相同的选项卡，也不会发生同样的事情。 :(。问题是什么？
在我的Fragment类中，我使用此代码初始化SlidingTab。
SlidingTabLayout slidingTabLayout = (SlidingTabLayout) view.findViewById(R.id.sliding_tabs);
slidingTabLayout.setCustomTabView(R.layout.tab_layout, R.id.tab_layout_icon);
slidingTabLayout.setSelectedIndicatorColors(getResources().getColor(R.color.mycolor));
slidingTabLayout.setDistributeEvenly(true);
slidingTabLayout.setViewPager(mPager);
这是我的SlidingTabLayout课程。
public class SlidingTabLayout extends HorizontalScrollView {
private static final int TITLE_OFFSET_DIPS = 24;
private static final int TAB_VIEW_PADDING_DIPS = 16;
private static final int TAB_VIEW_TEXT_SIZE_SP = 12;
private final SlidingTabStrip mTabStrip;
private int mTitleOffset;
private Context context;
private int mTabViewLayoutId;
private int mTabViewTextViewId;
private boolean mDistributeEvenly;
private Intent intent;
private ViewPager mViewPager;
private SparseArray<String> mContentDescriptions = new SparseArray<String>();
private ViewPager.OnPageChangeListener mViewPagerPageChangeListener;
private boolean loaded = false;
public SlidingTabLayout(Context context) {
this(context, null);
}
public SlidingTabLayout(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public SlidingTabLayout(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
this.context = context;
this.intent = intent;
// Disable the Scroll Bar
setHorizontalScrollBarEnabled(false);
// Make sure that the Tab Strips fills this View
setFillViewport(true);
mTitleOffset = (int) (TITLE_OFFSET_DIPS * getResources().getDisplayMetrics().density);
mTabStrip = new SlidingTabStrip(context);
addView(mTabStrip, LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);
}
// /**
// * Set the custom {@link com.google.samples.apps.iosched.ui.widget.SlidingTabLayout.TabColorizer} to be used.
// *
// * If you only require simple custmisation then you can use
// * {@link #setSelectedIndicatorColors(int...)} to achieve
// * similar effects.
// */
public void setCustomTabColorizer(TabColorizer tabColorizer) {
mTabStrip.setCustomTabColorizer(tabColorizer);
}
public void setDistributeEvenly(boolean distributeEvenly) {
mDistributeEvenly = distributeEvenly;
}
/**
* 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) {
mTabStrip.setSelectedIndicatorColors(colors);
}
// /**
// * Set the {@link ViewPager.OnPageChangeListener}. When using {@link com.google.samples.apps.iosched.ui.widget.SlidingTabLayout} you are
// * required to set any {@link ViewPager.OnPageChangeListener} through this method. This is so
// * that the layout can update it's scroll position correctly.
// *
// * @see ViewPager#setOnPageChangeListener(ViewPager.OnPageChangeListener)
// */
public void setOnPageChangeListener(ViewPager.OnPageChangeListener listener) {
mViewPagerPageChangeListener = listener;
}
/**
* Set the custom layout to be inflated for the tab views.
*
* @param layoutResId Layout id to be inflated
* @param textViewId id of the {@link TextView} in the inflated view
*/
public void setCustomTabView(int layoutResId, int textViewId) {
mTabViewLayoutId = layoutResId;
mTabViewTextViewId = textViewId;
}
/**
* 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());
final SharedPreferences prefs = context.getSharedPreferences("userProfileData", context.MODE_PRIVATE);
String profileInfo = prefs.getString("profiledata", null);
populateTabStripParent();
}
}
/**
* Create a default view to be used for tabs. This is called if a custom tab view is not set via
* {@link #setCustomTabView(int, int)}.
*/
protected TextView createDefaultTabView(Context context) {
TextView textView = new TextView(context);
textView.setGravity(Gravity.CENTER);
textView.setTextSize(TypedValue.COMPLEX_UNIT_SP, TAB_VIEW_TEXT_SIZE_SP);
textView.setTypeface(Typeface.DEFAULT_BOLD);
textView.setLayoutParams(new LinearLayout.LayoutParams(
ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT));
TypedValue outValue = new TypedValue();
getContext().getTheme().resolveAttribute(android.R.attr.selectableItemBackground,
outValue, true);
textView.setBackgroundResource(outValue.resourceId);
textView.setAllCaps(true);
int padding = (int) (TAB_VIEW_PADDING_DIPS * getResources().getDisplayMetrics().density);
textView.setPadding(padding, padding, padding, padding);
return textView;
}
public void populateTabStripParent() {
final PagerAdapter adapter = mViewPager.getAdapter();
final View.OnClickListener tabClickListener = new TabClickListener();
View tabView = null;
for (int i = 0; i < adapter.getCount(); i++) {
LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT, 1.0f);
tabView = LayoutInflater.from(getContext()).inflate(R.layout.tab_layout, mTabStrip,
false);
ImageView iconImageView = (ImageView) tabView.findViewById(R.id.tab_layout_icon);
iconImageView.setImageDrawable(getContext().getResources().getDrawable(Integer.parseInt((String) adapter.getPageTitle(i))));
if (mViewPager.getCurrentItem() == i) {
//iconImageView.setSelected(true);
}
tabView.setOnClickListener(tabClickListener);
mTabStrip.addView(tabView, layoutParams);
}
}
@Override
protected void onAttachedToWindow() {
super.onAttachedToWindow();
if (mViewPager != null) {
scrollToTab(mViewPager.getCurrentItem(), 0);
}
}
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 (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);
}
}
// /**
// * Allows complete control over the colors drawn in the tab layout. Set with
// * {@link #setCustomTabColorizer(com.google.samples.apps.iosched.ui.widget.SlidingTabLayout.TabColorizer)}.
// */
public interface TabColorizer {
/**
* @return return the color of the indicator used when {@code position} is selected.
*/
int getIndicatorColor(int position);
}
private class InternalViewPagerListener implements ViewPager.OnPageChangeListener {
private int mScrollState;
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
int tabStripChildCount = mTabStrip.getChildCount();
if ((tabStripChildCount == 0) || (position < 0) || (position >= tabStripChildCount)) {
return;
}
mTabStrip.onViewPagerPageChanged(position, positionOffset);
View selectedTitle = mTabStrip.getChildAt(position);
if (position == 0)
selectedTitle.setSelected(true);
else
mTabStrip.getChildAt(0).setSelected(false);
int extraOffset = (selectedTitle != null)
? (int) (positionOffset * selectedTitle.getWidth())
: 0;
scrollToTab(position, extraOffset);
if (mViewPagerPageChangeListener != null) {
mViewPagerPageChangeListener.onPageScrolled(position, positionOffset,
positionOffsetPixels);
}
}
@Override
public void onPageScrollStateChanged(int state) {
mScrollState = state;
if (mViewPagerPageChangeListener != null) {
mViewPagerPageChangeListener.onPageScrollStateChanged(state);
}
}
@Override
public void onPageSelected(int position) {
int tabStripChildCount = mTabStrip.getChildCount();
if ((tabStripChildCount == 0) || (position < 0) || (position >= tabStripChildCount)) {
return;
}
for (int i = 0; i < mTabStrip.getChildCount(); i++) {
mTabStrip.getChildAt(i).setSelected(false);
}
View selectedTitle = mTabStrip.getChildAt(position);
selectedTitle.setSelected(true);
if (mScrollState == ViewPager.SCROLL_STATE_IDLE) {
mTabStrip.onViewPagerPageChanged(position, 0f);
scrollToTab(position, 0);
}
if (mViewPagerPageChangeListener != null) {
mViewPagerPageChangeListener.onPageSelected(position);
}
if (mScrollState == ViewPager.SCROLL_STATE_IDLE) {
mTabStrip.onViewPagerPageChanged(position, 0f);
scrollToTab(position, 0);
}
if (mViewPagerPageChangeListener != null) {
mViewPagerPageChangeListener.onPageSelected(position);
}
}
}
private class TabClickListener implements OnClickListener {
@Override
public void onClick(View v) {
for (int i = 0; i < mTabStrip.getChildCount(); i++) {
if (v == mTabStrip.getChildAt(i)) {
mViewPager.setCurrentItem(i);
return;
}
}
}
}
答案 0 :(得分：2)
mViewPager.setAdapter(new SampleFragmentPagerAdapter(
getChildFragmentManager(), getActivity()));
您必须使用getChildFragmentManager()代替getFragmentManager()。这就是全部，伙计。