我在TabLayout
内使用Fragment
来显示三个固定标签并且标签正常工作,但即使我在app:tabTextColor
属性中设置public class NewFragment extends Fragment {
private RecyclerView mRecyclerView;
private RecyclerView.LayoutManager mLayoutManager;
private RecyclerView.Adapter mAdapter;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View inflatedView = inflater.inflate(R.layout.new_fragment, container, false);
TabLayout tabLayout = (TabLayout) inflatedView.findViewById(R.id.tabLayout);
tabLayout.addTab(tabLayout.newTab().setText("Tab 1"));
tabLayout.addTab(tabLayout.newTab().setText("Tab 2"));
tabLayout.addTab(tabLayout.newTab().setText("Tab 3"));
final ViewPager viewPager = (ViewPager) inflatedView.findViewById(R.id.viewpager);
LinearLayoutManager mLayoutManager = new LinearLayoutManager(getActivity());
mLayoutManager.setOrientation(LinearLayoutManager.VERTICAL);
viewPager.setAdapter(new PagerAdapter(getFragmentManager(), tabLayout.getTabCount()));
viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
tabLayout.setupWithViewPager(viewPager);
tabLayout.setTabMode(TabLayout.MODE_FIXED);
tabLayout.setOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
@Override
public void onTabSelected(TabLayout.Tab tab) {
viewPager.setCurrentItem(tab.getPosition());
}
@Override
public void onTabUnselected(TabLayout.Tab tab) {
}
@Override
public void onTabReselected(TabLayout.Tab tab) {
}
});
return inflatedView;
}
public class PagerAdapter extends FragmentStatePagerAdapter {
int mNumOfTabs;
public PagerAdapter(FragmentManager fm, int NumOfTabs) {
super(fm);
this.mNumOfTabs = NumOfTabs;
}
@Override
public Fragment getItem(int position) {
switch (position) {
case 0:
return new FragmentTab();
case 1:
return new FragmentTab();
case 2:
return new FragmentTab();
default:
return null;
}
}
@Override
public int getCount() {
return mNumOfTabs;
}
}
}
属性后它也没有显示标签文本布局它仍然不可见。
NewFragment.java
<android.support.design.widget.AppBarLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
tools:context=".NewFragment">
<android.support.design.widget.TabLayout
android:id="@+id/tabLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:tabMode="fixed"
app:tabTextColor="#ffffff"
app:tabGravity="fill"
app:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"/>
<android.support.v4.view.ViewPager
android:id="@+id/viewpager"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@android:color/white"/>
</android.support.design.widget.AppBarLayout>
newfragment.xml
var ui = SpreadsheetApp.getUi();
var response = ui.alert('test',test, ui.ButtonSet.OK_CANCEL);
if (response == ui.Button.OK) {
ui.alert('OK');
} else {
ui.alert('NOT OK')
}
答案 0 :(得分:109)
问题是您在使用setupWithViewPager()
电话设置标签后调用addTab()
,有效地覆盖了它们。
来自TabLayout
的{{1}}关于setupWithViewPager()
:
此处显示的标签 布局将从
ViewPager
适配器的页面标题中填充。
如果您想将TabLayout
与ViewPager
一起使用,则应覆盖getPageTitle()
中的PagerAdapter
(并删除addTab()
来电,多余的。)
例如:
public class ExamplePagerAdapter extends FragmentStatePagerAdapter {
// tab titles
private String[] tabTitles = new String[]{"Tab1", "Tab2", "Tab3"};
public ExamplePagerAdapter(FragmentManager fm) {
super(fm);
}
// overriding getPageTitle()
@Override
public CharSequence getPageTitle(int position) {
return tabTitles[position];
}
@Override
public Fragment getItem(int position) {
switch (position) {
case 0:
return new Tab1Fragment();
case 1:
return new Tab2Fragment();
case 2:
return new Tab3Fragment();
default:
return null; // shouldn't happen
}
}
@Override
public int getCount() {
return tabTitles.length;
}
// ...
}
答案 1 :(得分:8)
我在调用tabs.setupWithViewPager(viewPager)
viewPager.setAdapter(new MyViewAdapter(getSupportFragmentManager()));
TabLayout tabs=(TabLayout) findViewById(R.id.tabs);
tabs.setupWithViewPager(viewPager);
tabs.getTabAt(0).setIcon(R.drawable.icon1);
tabs.getTabAt(1).setIcon(R.drawable.icon2);
tabs.getTabAt(0).setText(getResources().getText(R.string.tab1));
tabs.getTabAt(1).setText(getResources().getText(R.string.tab2));
答案 2 :(得分:1)
我正在使用Kotlin,花了一个小时来查找这段代码中的错误。
res.headers.www-authenticate: "Bearer error=\"Invalid credentials\""
我可以毫无错误地进行编译,但是直到我意识到分配给tabLayout的 viewpager 不是 viewPager 时,标签标题才显示出来(注意大写' P')。不会产生错误,因为Kotlin将找到任何匹配的布局ID,在本例中为“ viewpager”,它是一个ViewPager,但在另一个视图上。
答案 3 :(得分:0)
谢谢Hatem Badawi
我最近开始用Java开发。之前,我在.Net中使用WPF和XAML,并且在UI设计方面存在很大差异。无论如何,我有同样的问题。我想用XML定义TabItem,而不是通过编程来实现。如您所述,此setupWithViewPager()调用会将选项卡项目的文本和图标重置为null(它使用相同的选项卡对象,只是重置其内容)。我使用了您的方法,但使其更可重用。这是我的代码:
public class TabLayoutUtil {
public static void setupTabLayoutWithViewPager(TabLayout tabLayout, ViewPager viewPager) {
ArrayList<Pair<CharSequence, Drawable>> tabsContentCopy= new ArrayList<>();
for (int i = 0; i < tabLayout.getTabCount(); i++) {
TabLayout.Tab tab = tabLayout.getTabAt(i);
tabsContentCopy.add(new Pair<>(tab != null ? tab.getText() : null, tab != null ? tab.getIcon() : null));
}
tabLayout.setupWithViewPager(viewPager);
for (int i = 0; i < tabLayout.getTabCount(); i++) {
if (i<tabsContentCopy.size()) {
tabLayout.getTabAt(i).setText(tabsContentCopy.get(i).first);
tabLayout.getTabAt(i).setIcon(tabsContentCopy.get(i).second);
}
}
}
}