我在Android TV上使用ViewPager / TabLayout,我有2个问题。
1)目前,如果按下DPAD_UP,焦点将转到选项卡,但在按下DPAD_CENTER之前,页面实际上不会更改为与焦点选项卡对应的页面。因此,聚焦(在选项卡文本周围显示为灰色框)和选中(显示为下划线)之间存在差异。我想知道是否可以有任何专注于选择的东西?
2)我的ViewPager中有3个选项卡,其中tab1中的片段需要具有焦点才能正确显示内容。当我从tab3切换到tab1时,焦点不会给予片段,而是保留在制表符中。这会导致我的片段无法正常显示。我想知道是否有办法将焦点从标签上移开?我深入研究了ViewPager和TabLayout的源代码,我知道TabLayout的重点是,但无论我尝试什么,我都无法带走TabView的焦点状态(即标签文本周围的灰色框不会出现直到我使用DPAD_DOWN“向下”到片段)。
尝试((ViewGroup)tabLayout.getChildAt(0))。getChildAt(desiredPosition).clearFocus()并没有帮助。 我不想使用viewPager.setOffscreenPageLimit(2);
// This is my viewpager activity class
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_view_pager);
ViewPager viewPager = (ViewPager) findViewById(R.id.viewPager);
adapterViewPager = new MyPagerAdapter(getFragmentManager());
viewPager.setAdapter(adapterViewPager);
// Give the TabLayout the ViewPager
TabLayout tabLayout = (TabLayout) findViewById(R.id.sliding_tabs);
tabLayout.setupWithViewPager(viewPager);
tabLayout.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
@Override
public void onTabSelected(TabLayout.Tab tab) {
// Tried to clear focus of tab here, didn't help
}
@Override
public void onTabUnselected(TabLayout.Tab tab) {
}
@Override
public void onTabReselected(TabLayout.Tab tab) {
}
});
}
public static class MyPagerAdapter extends FragmentPagerAdapter {
private static int NUM_ITEMS = 3;
public MyPagerAdapter(FragmentManager fragmentManager) {
super(fragmentManager);
}
// Returns total number of pages.
@Override
public int getCount() {
return NUM_ITEMS;
}
// Returns the fragment to display for a particular page.
@Override
public Fragment getItem(int position) {
switch (position) {
case 0:
return new OneFragment; // This is the fragment that needs focus
case 1:
return new TwoFragment();
case 2:
return new ThreeFragment();
default:
return null;
}
}
// Returns the page title for the top indicator
@Override
public CharSequence getPageTitle(int position) {
if (position == 0) {
return "Fragment 1";
} else if (position == 1) {
return "Fragment 2";
} else {
return "Fragment 3";
}
}
}
<?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"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<android.support.design.widget.TabLayout
android:id="@+id/sliding_tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:tabMode="fixed"
android:theme="@style/AppThemeTab" />
<android.support.v4.view.ViewPager
android:id="@+id/viewPager"
android:layout_width="match_parent"
android:layout_height="match_parent">
</android.support.v4.view.ViewPager>
</RelativeLayout>
感谢任何帮助,谢谢!
答案 0 :(得分:0)
一种衬管解决方案:)。要抑制对Tablayout子视图的关注,请使用以下代码段,假设该选项卡是可滚动的-也就是说,选项卡的选择是通过digipad滚动的:
tabLayout.setTabMode(TabLayout.MODE_SCROLLABLE);
tabLayout.setDescendantFocusability(ViewGroup.FOCUS_BLOCK_DESCENDANTS);