使用TabLayout一个片段内;标签文字无形 [英] Using TabLayout inside a Fragment; tab text invisible
问题描述
我目前正在与新的支持Android设计库。我已经实现了一个 NavigationView
我的 MainActivity.java
,它使用一个FragmentManager在导航项目之间进行导航抽屉:
getSupportFragmentManager()
.beginTransaction()
.replace(R.id.content,mTabLayoutFragment)
.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN)
。承诺();
我在片段中的一个使用 TabLayout
。这里是片段的布局:
< android.support.design.widget.AppBarLayout的xmlns:机器人=http://schemas.android.com/apk/res/android
的xmlns:工具=http://schemas.android.com/tools
的xmlns:程序=http://schemas.android.com/apk/res-auto
机器人:layout_width =match_parent
机器人:layout_height =match_parent>
< android.support.design.widget.TabLayout
机器人:ID =@ + ID / tabLayout
机器人:layout_width =match_parent
机器人:layout_height =WRAP_CONTENT
应用程序:tabMode =固定
应用程序:tabGravity =补
应用程序:主题=@风格/ ThemeOverlay.AppCompat.Dark.ActionBar/>
< android.support.v4.view.ViewPager
机器人:ID =@ + ID / viewpager
机器人:layout_width =match_parent
机器人:layout_height =WRAP_CONTENT
机器人:背景=@机器人:彩色/白/>
< /android.support.design.widget.AppBarLayout>
和它背后的Java的code:
进口android.os.Bundle;
进口android.support.design.widget *。
进口android.support.v4.app.Fragment;
进口android.support.v4.app.FragmentManager;
进口android.support.v4.app.FragmentStatePagerAdapter;
进口android.support.v4.view.ViewPager;
进口android.view.LayoutInflater;
进口android.view.View;
进口android.view.ViewGroup;
公共类TabLayoutFragment扩展片段{
@覆盖
公共查看onCreateView(LayoutInflater充气,容器的ViewGroup,
捆绑savedInstanceState){
查看inflatedView = inflater.inflate(R.layout.fragment_tablayout,集装箱,假);
TabLayout tabLayout =(TabLayout)inflatedView.findViewById(R.id.tabLayout);
tabLayout.addTab(tabLayout.newTab()的setText(Campusplan)。);
tabLayout.addTab(tabLayout.newTab()的setText(Raumplan)。);
最后ViewPager viewPager =(ViewPager)inflatedView.findViewById(R.id.viewpager);
viewPager.setAdapter(新PagerAdapter
(getFragmentManager(),tabLayout.getTabCount()));
viewPager.addOnPageChangeListener(新TabLayout.TabLayoutOnPageChangeListener(tabLayout));
tabLayout.setOnTabSelectedListener(新TabLayout.OnTabSelectedListener(){
@覆盖
公共无效onTabSelected(TabLayout.Tab标签){
viewPager.setCurrentItem(tab.getPosition());
}
@覆盖
公共无效onTabUnselected(TabLayout.Tab标签){
}
@覆盖
公共无效onTabReselected(TabLayout.Tab标签){
}
});
返回inflatedView;
}
公共类PagerAdapter扩展FragmentStatePagerAdapter {
INT mNumOfTabs;
公共PagerAdapter(FragmentManager FM,NumOfTabs){
超(FM);
this.mNumOfTabs = NumOfTabs;
}
@覆盖
公共片段的getItem(INT位置){
开关(位置){
情况下0:
TabItem1 TAB1 =新TabItem1();
返回TAB1;
情况1:
TabItem1 TAB2 =新TabItem1();
返回TAB2;
默认:
返回null;
}
}
@覆盖
公众诠释getCount将(){
返回mNumOfTabs;
}
}
}
请注意 TabItem1
和 TabItem1
,这是片段组成的只是一个TextView。这两个要被显示在TabLayout
现在,这个code似乎是工作,在一定程度上。下面是它的样子:
什么是奇怪的是,在我的旋转设备,一切似乎都工作得很好:
这看起来像是被要求更改配置。这是奇怪的,特别是考虑到我已经按照我的 AndroidManifest
:
安卓configChanges =方向|屏幕尺寸
更新:设计库v23.0.0解决了这个问题。
在这里发现了问题:<一href="https://$c$c.google.com/p/android/issues/detail?id=180462">https://$c$c.google.com/p/android/issues/detail?id=180462
简单的解决方法:
tabLayout.post(新的Runnable(){
@覆盖
公共无效的run(){
tabLayout.setupWithViewPager(viewPager);
}
});
I'm currently experimenting with various new components in the new Android Support Design library. I've implemented a NavigationView
in my MainActivity.java
, which uses a FragmentManager to navigate between the items in the Navigation drawer:
getSupportFragmentManager()
.beginTransaction()
.replace(R.id.content, mTabLayoutFragment)
.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN)
.commit();
I'm using a TabLayout
in one of the fragments. Here is the fragment's layout:
<android.support.design.widget.AppBarLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.TabLayout
android:id="@+id/tabLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:tabMode="fixed"
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>
And the Java code behind it:
import android.os.Bundle;
import android.support.design.widget.*;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentStatePagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class TabLayoutFragment extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View inflatedView = inflater.inflate(R.layout.fragment_tablayout, container, false);
TabLayout tabLayout = (TabLayout) inflatedView.findViewById(R.id.tabLayout);
tabLayout.addTab(tabLayout.newTab().setText("Campusplan"));
tabLayout.addTab(tabLayout.newTab().setText("Raumplan"));
final ViewPager viewPager = (ViewPager) inflatedView.findViewById(R.id.viewpager);
viewPager.setAdapter(new PagerAdapter
(getFragmentManager(), tabLayout.getTabCount()));
viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
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:
TabItem1 tab1 = new TabItem1();
return tab1;
case 1:
TabItem1 tab2 = new TabItem1();
return tab2;
default:
return null;
}
}
@Override
public int getCount() {
return mNumOfTabs;
}
}
}
Please note TabItem1
and TabItem1
, which are fragments consisting of nothing but a TextView. These two are to be displayed in the TabLayout.
Now, this code seems to be working, to some extent. Here is how it looks like:
What's weird is, after I rotate the device, everything seems to be working just fine:
It seems like something gets called upon a configuration change. This is weird, especially considering that I have following in my AndroidManifest
:
android:configChanges="orientation|screenSize"
Update: Design Library v23.0.0 solves this issue.
Found the problem here: https://code.google.com/p/android/issues/detail?id=180462
Simple workaround:
tabLayout.post(new Runnable() {
@Override
public void run() {
tabLayout.setupWithViewPager(viewPager);
}
});
这篇关于使用TabLayout一个片段内;标签文字无形的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!