我正在创建一个类似WhatsApp的布局,我使用了viewPager2。它可以完美地滑动,但当我点击某个特定的标签时,它不会移动。如果我从右向左点击标签,它会移动,但从左向右它不会移动。我尝试了很多解决方案,但似乎都不起作用。
主要活动:
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
TabLayout tabLayout = (TabLayout) findViewById(R.id.tabLayout);
tabLayout.addTab(tabLayout.newTab().setText("Camera"));
tabLayout.addTab(tabLayout.newTab().setText("Chats"));
tabLayout.addTab(tabLayout.newTab().setText("Status"));
tabLayout.addTab(tabLayout.newTab().setText("Calls"));
tabLayout.setTabGravity(TabLayout.GRAVITY_FILL);
final ViewPager2 viewPager = (ViewPager2) findViewById(R.id.pager);
viewPager.setOffscreenPageLimit(3);
final PagerAdapter adapter = new PagerAdapter(getSupportFragmentManager(), getLifecycle());
viewPager.setAdapter(adapter);
tabLayout.addOnTabSelectedListener(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) {
}
});
viewPager.registerOnPageChangeCallback(new ViewPager2.OnPageChangeCallback() {
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
super.onPageScrolled(position, positionOffset, positionOffsetPixels);
tabLayout.selectTab(tabLayout.getTabAt(position));
}
});
}
}
寻呼机适配器:
public class PagerAdapter extends FragmentStateAdapter {
public PagerAdapter(@NonNull FragmentManager fragmentManager, @NonNull Lifecycle lifecycle) {
super(fragmentManager, lifecycle);
}
@NonNull
@Override
public Fragment createFragment(int position) {
switch(position) {
case 0:
CameraFragment cameraFragment = new CameraFragment();
return cameraFragment;
case 1:
ChatsFragment chatsFragment = new ChatsFragment();
return chatsFragment;
case 2:
StatusFragment statusFragment = new StatusFragment();
return statusFragment;
case 3:
CallsFragment callsFragment = new CallsFragment();
return callsFragment;
default:
return new ChatsFragment();
}
}
@Override
public int getItemCount() {
return 4;
}
}
1条答案
按热度按时间kjthegm61#
使用
TabLayoutMediator
代替OnTabSelectedListener
进行如下更改
并删除以下代码