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我试图实现有4个片段（固定）的主页viewpager。碎片本身并不滞后（我确信这是因为它们以前是通过导航抽屉来实现的）。这些碎片包含了滞后的回收站视图。它包含图像。为了加载我使用Glide的图像。我已经尝试setEnabledNestedScrollingEnabled为false，但没有这样的幸运。为了测试目的，我只是测试一个片段，即使那么它滞后。Viewpager Recyclerview滚动滞后
MainActivity
package com.example.anubhavr.firebase;
public class MainActivity extends AppCompatActivity {
private Toolbar toolbar;
private TabLayout tabLayout;
private ViewPager viewPager;
private int[] tabIcons = {R.drawable.fragment_one, R.drawable.fragment_two, R.drawable.fragment_three, R.drawable.fragment_four};
private String[] names = {"Fragment 1", "Fragment 2", "Fragment 3", "Fragment 4"};
private int isOffline;
private FloatingActionButton floatingActionButton;
private static int currentTab = 0;
private final int RC_SIGN_IN = 1;
private GoogleApiClient mGoogleApiClient;
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.tab_view_menu, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.menu_profile: {
viewProfile();
return true;
}
case R.id.menu_sign_out: {
signout();
return true;
}
case R.id.menu_store:
{
startVisitingStore();
return true;
}
default:
return super.onOptionsItemSelected(item);
}
}
private void startVisitingStore(){
Intent i = new Intent(this, StoreActivity.class);
startActivity(i);
}
private void viewProfile() {
Intent i = new Intent(this, ProfileActivity.class);
startActivity(i);
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
isOffline = getIntent().getIntExtra("isOffline", 0); //1 means is offline, 0 means is online
toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
viewPager = (ViewPager) findViewById(R.id.viewpager);
setupViewPager(viewPager);
tabLayout = (TabLayout) findViewById(R.id.tabs);
tabLayout.setupWithViewPager(viewPager);
setupTabIcons();
}
private void setupTabIcons() {
final TabLayout.Tab tab = tabLayout.getTabAt(0);
Glide.with(this)
.load(tabIcons[0])
.override(42,42)
.into(new SimpleTarget<GlideDrawable>() {
@Override
public void onResourceReady(GlideDrawable resource, GlideAnimation<? super GlideDrawable> glideAnimation) {
tab.setIcon(resource);
}
});
}
private void setupViewPager(ViewPager viewPager) {
ViewPagerAdapter adapter = new ViewPagerAdapter(getSupportFragmentManager());
Fragment_One one = new Fragment_One();
Bundle bundle = new Bundle();
bundle.putInt("isOffline", isOffline);
mainActivity.setArguments(bundle);
adapter.addFrag(one, names[0]);
viewPager.setAdapter(adapter);
viewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}
@Override
public void onPageSelected(int position) {
toolbar.setTitle(names[position]);
currentTab = position;
}
@Override
public void onPageScrollStateChanged(int state) {
}
});
}
class ViewPagerAdapter extends FragmentPagerAdapter {
private final List<Fragment> mFragmentList = new ArrayList<>();
private final List<String> mFragmentTitleList = new ArrayList<>();
public ViewPagerAdapter(FragmentManager manager) {
super(manager);
}
@Override
public Fragment getItem(int position) {
return mFragmentList.get(position);
}
@Override
public int getCount() {
return mFragmentList.size();
}
public void addFrag(Fragment fragment, String title) {
mFragmentList.add(fragment);
mFragmentTitleList.add(title);
}
@Override
public CharSequence getPageTitle(int position) {
return null;
}
}
}
activity_main.xml中
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
xmlns:tools="http://schemas.android.com/tools"
android:layout_height="match_parent">
<android.support.design.widget.TabLayout
android:id="@+id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:tabMode="fixed"
app:tabGravity="fill"/>
<android.support.v4.view.ViewPager
android:id="@+id/viewpager"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="@string/appbar_scrolling_view_behavior" />
</RelativeLayout>
Fragment_One
public class Fragment_One extends Fragment implements GEventLoadMore {
......
......
public void setView(final ArrayList<GEventAdapter> eventsArr) {
listView = (RecyclerView) view.findViewById(R.id.listView);
listView.setNestedScrollingEnabled(false);
RecyclerView.ItemAnimator animator = listView.getItemAnimator();
if (animator instanceof SimpleItemAnimator) {
((SimpleItemAnimator) animator).setSupportsChangeAnimations(false);
}
mLinearLayoutManager = new LinearLayoutManager(getContext());
listView.addItemDecoration(new VerticalSpaceItemDecoration(2));
listView.setLayoutManager(mLinearLayoutManager);
adapter = new Fragment_One_CustomAdapter(getContext(), R.layout.example, eventsArr);
listView.setAdapter(adapter);
listView.addOnScrollListener(new RecyclerView.OnScrollListener() {
@Override
public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
super.onScrollStateChanged(recyclerView, newState);
if (eventsArr.size() > 0) {
int lastVisiblePosition = mLinearLayoutManager.findLastCompletelyVisibleItemPosition();
if (lastVisiblePosition == recyclerView.getChildCount()) {
//progressDialog.show();
if(isOffline==0)
loadMoreFunction();
}
}
}
@Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
}
});
restoreScrollPosition();
}
.....
.....
}
确保您使用的是低分辨率图像 –
我对各自的dpis使用相应的res。 – THGRoy
你的标题说ViewPager滞后，但在你的问题，它说RecyclerView滞后？ –