Android片段没有显示文本视图和内部元素
问题描述:
我是新来android.I创建一个tablayout和viewpager与两个片段。我有元素/项目在我创建的细节片段和一个TextView在我的小节片段,但是当我在我的手机上运行代码,没有任何显示在我的片段中。我没有我的片段的Java代码。一切工作正常在tablayout ..我可以切换标签,但没有任何显示在我的片段...为什么这是怎么回事?Android片段没有显示文本视图和内部元素
我的活动:活动
package com.example.update;
import android.content.Intent;
import android.support.design.widget.TabLayout;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;
import android.widget.Toast;
public class UpdateDetail extends AppCompatActivity {
TabLayout tabLayout;
ViewPager viewPager;
ViewPagerAdapter viewPagerAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_detail);
tabLayout=(TabLayout)findViewById(R.id.tabLayout);
viewPager=(ViewPager)findViewById(R.id.viewPager);
viewPagerAdapter=new ViewPagerAdapter(getSupportFragmentManager());
viewPagerAdapter.addFragments(new DetailFragment()," DETAIL");
viewPagerAdapter.addFragments(new MeasureFragment(),"MEASURE");
viewPager.setAdapter(viewPagerAdapter);
tabLayout.setupWithViewPager(viewPager);
}
}
代码
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.update">
<android.support.design.widget.AppBarLayout
android:layout_height="wrap_content"
android:layout_width="match_parent"
>
<!--<include android:layout_height="wrap_content"
android:layout_width="match_parent"
layout="@layout/toolbar_layout"/>-->
<include
android:id="@+id/update_screen_toolbar"
layout="@layout/toolbar_layout"
/>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:id="@+id/name_age_gender"
android:background="#d3d3d3"
android:layout_below="@+id/update_screen_toolbar"/>
<android.support.design.widget.TabLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/tabLayout"
app:tabMode="fixed"
app:tabGravity="fill">
</android.support.design.widget.TabLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/viewPager">
</android.support.v4.view.ViewPager>
</RelativeLayout>
JAVA代码DetailFragment:
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.DetailFragment">
<!-- TODO: Update blank fragment layout -->
<Button
android:id="@+id/expandableButton4"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="#066da1"
android:drawableRight="@android:drawable/arrow_down_float"
android:onClick="expandableButton4"
android:paddingRight="10dp"
android:text="Expand/Collapse Android Example"
android:textColor="#fff" />
<com.github.aakira.expandablelayout.ExpandableRelativeLayout
android:id="@+id/expandableLayout4"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="@+id/expandableButton4"
android:background="#90066da1"
android:padding="16dp"
app:ael_duration="400"
app:ael_expanded="false"
app:ael_interpolator="bounce"
app:ael_orientation="vertical">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Implements the expand and collapse by sliding logic for a top or a bottom view in a two children view or layout or any widgets composition.
Implements the expand and collapse by sliding logic for a top or a bottom view in a two children view or layout or any widgets composition." />
</com.github.aakira.expandablelayout.ExpandableRelativeLayout>
</FrameLayout>
答
试试这个:
public class FriendshipParentFragment extends Fragment {
@BindView(R.id.tabs)
TabLayout tabs;
@BindView(R.id.viewpager)
ViewPager viewPager;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_friendship_parent, container, false);
ButterKnife.bind(this, view);
initTabs();
return view;
}
private void initTabs(){
viewPager.setAdapter(new TabsAdapter(getChildFragmentManager()));
tabs.setupWithViewPager(viewPager);
tabs.getTabAt(0).setText("Tab1");
tabs.getTabAt(1).setText("Tab2");
tabs.setTabTextColors(ContextCompat.getColor(getActivity(), R.color.colorAccent), ContextCompat.getColor(getActivity(), R.color.colorBottomNavigationPrimary));
tabs.setSelectedTabIndicatorColor(ContextCompat.getColor(getActivity(), R.color.white));
tabs.setSelectedTabIndicatorHeight(4);
}
public class TabsAdapter extends FragmentPagerAdapter {
public TabsAdapter(FragmentManager fm) {
super(fm);
}
@Override
public Fragment getItem(int position) {
switch (position){
case 0:
return new FollowersFragment();
case 1:
return new FollowFragment();
}
return null;
}
@Override
public int getCount() {
return 2;
}
}
}
xml文件
<LinearLayout 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:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="owo.owocar.driver.OrdersParentFragment">
<android.support.design.widget.TabLayout
android:id="@+id/tabs"
android:layout_width="match_parent"
android:layout_height="48dp"
android:elevation="4dp"
app:tabGravity="fill" />
<android.support.v4.view.ViewPager
android:layout_width="match_parent"
android:id="@+id/viewpager"
android:layout_height="match_parent"></android.support.v4.view.ViewPager>
+0
为什么会出现这样的问题?...当我只用一个工具栏,一个选项卡布局和一个视图寻呼机....一切工作正常? – Jason
+0
@Jason现在无法运行您的代码。尝试我的方法它做得很好;) –
http://www.androidhive.info/2015/09/android-material-design-working -with-tabs /通过这个链接它确实工作 – siddhesh