我正在使用这个lib：https://github.com/florent37/MaterialViewPager
我有一个导航抽屉，如果我点击导航器中列表中的一个项目，则会显示“材质视图寻呼机”。 （替换片段）。
但我在那里得到了这个错误:(
Recursive entry to executePendingTransactions
at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1534)
at android.support.v4.app.FragmentManagerImpl.executePendingTransactions(FragmentManager.java:535)
at android.support.v4.app.FragmentStatePagerAdapter.finishUpdate(FragmentStatePagerAdapter.java:163)
at android.support.v4.view.ViewPager.populate(ViewPager.java:1106)
at android.support.v4.view.ViewPager.populate(ViewPager.java:952)
at android.support.v4.view.ViewPager.setOffscreenPageLimit(ViewPager.java:733)
at razor.nikhil.mvp.MaterialVPFrag.onViewCreated(MaterialVPFrag.java:130)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1035)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1197)
at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:738)
at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1562)
at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:483)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
)
在这一行：
mViewPager.getViewPager().setOffscreenPageLimit(mViewPager.getViewPager().getAdapter().getCount());
如果我删除该行，它可以工作（但是这会在以后给我一个错误吗？） 当我浏览标签时，我有时会收到此错误。 （
java.lang.IndexOutOfBoundsException: Inconsistency detected. Invalid view holder adapter positionViewHolder{26fe4ecd position=6 id=-1, oldPos=-1, pLpos:-1 no parent}
at android.support.v7.widget.RecyclerView$Recycler.validateViewHolderForOffsetPosition(RecyclerView.java:4349)
at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:4480)
at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:4461)
at android.support.v7.widget.LinearLayoutManager$LayoutState.next(LinearLayoutManager.java:1962)
at android.support.v7.widget.LinearLayoutManager.layoutChunk(LinearLayoutManager.java:1371)
at android.support.v7.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1334)
at android.support.v7.widget.LinearLayoutManager.scrollBy(LinearLayoutManager.java:1162)
at android.support.v7.widget.LinearLayoutManager.scrollVerticallyBy(LinearLayoutManager.java:1019)
at android.support.v7.widget.RecyclerView$ViewFlinger.run(RecyclerView.java:3912)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:767)
at android.view.Choreographer.doCallbacks(Choreographer.java:580)
at android.view.Choreographer.doFrame(Choreographer.java:549)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:753)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698) )
这条错误是因为那条线吗？
MaterialVPFrag.java（带有materialviewpager的片段）
public class MaterialVPFrag extends Fragment {
private MaterialViewPager mViewPager;
List<Model_Daywise> todayslist_m;
List<Model_Daywise> todayslist_t;
List<Model_Daywise> todayslist_w;
List<Model_Daywise> todayslist_th;
List<Model_Daywise> todayslist_fr;
public static MaterialVPFrag newInstance() {
return new MaterialVPFrag();
}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
return inflater.inflate(R.layout.mvp_layout, container, false);
}
@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
todayslist_m = new MTWTHgetset(getActivity(), "monday").getAllCredentials();//getting data from SQL
todayslist_t = new MTWTHgetset(getActivity(), "tuesday").getAllCredentials();
todayslist_w = new MTWTHgetset(getActivity(), "wednesday").getAllCredentials();
todayslist_th = new MTWTHgetset(getActivity(), "thursday").getAllCredentials();
todayslist_fr = new MTWTHgetset(getActivity(), "friday").getAllCredentials();
mViewPager = (MaterialViewPager) view.findViewById(R.id.materialViewPager);
mViewPager.getViewPager().setAdapter(new FragmentStatePagerAdapter(getActivity().getSupportFragmentManager()) {
@Override
public Fragment getItem(int position) {
switch (position) {
case 0:
return RecyclerViewFragment.newInstance(todayslist_m);
case 1:
return RecyclerViewFragment.newInstance(todayslist_t);
case 2:
return RecyclerViewFragment.newInstance(todayslist_w);
case 3:
return RecyclerViewFragment.newInstance(todayslist_th);
case 4:
return RecyclerViewFragment.newInstance(todayslist_fr);
// return WebViewFragment.newInstance();
default:
return RecyclerViewFragment.newInstance(todayslist_m);
}
}
@Override
public int getCount() {
return 5;
}
@Override
public CharSequence getPageTitle(int position) {
switch (position) {
case 0:
return "Monday";
case 1:
return "Tuesday";
case 2:
return "Wednesday";
case 3:
return "Thursday";
case 4:
return "Friday";
}
return "";
}
});
mViewPager.setMaterialViewPagerListener(new MaterialViewPager.Listener() {
@Override
public HeaderDesign getHeaderDesign(int page) {
switch (page) {
case 0:
return HeaderDesign.fromColorResAndUrl(
R.color.green,
"https://fs01.androidpit.info/a/63/0e/android-l-wallpapers-630ea6-h900.jpg");
case 1:
return HeaderDesign.fromColorResAndUrl(
R.color.blue,
"http://cdn1.tnwcdn.com/wp-content/blogs.dir/1/files/2014/06/wallpaper_51.jpg");
case 2:
return HeaderDesign.fromColorResAndUrl(
R.color.cyan,
"http://www.droid-life.com/wp-content/uploads/2014/10/lollipop-wallpapers10.jpg");
case 3:
return HeaderDesign.fromColorResAndUrl(
R.color.red,
"http://www.tothemobile.com/wp-content/uploads/2014/07/original.jpg");
}
//execute others actions if needed (ex : modify your header logo)
return null;
}
});
mViewPager.getViewPager().setOffscreenPageLimit(mViewPager.getViewPager().getAdapter().getCount());
mViewPager.getPagerTitleStrip().setViewPager(mViewPager.getViewPager());
View logo = view.findViewById(R.id.logo_white);
if (logo != null)
logo.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mViewPager.notifyHeaderChanged();
Toast.makeText(getActivity(), "Yes, the title is clickable", Toast.LENGTH_SHORT).show();
}
});
}
}
DrawerActivity.java（带有NavDrawer的类）
public class DrawerActivity extends ActionBarActivity {
Toolbar t;
private DrawerLayout mDrawerLayout;
private ListView mDrawerList;
private RelativeLayout mRelativeLayout;
private ActionBarDrawerToggle mDrawerToggle;
static List<Model_Slots> list;
private CharSequence mDrawerTitle, mTitle;
private String[] navMenuItems;
private SpannableString[] navmenuItems;
private ArrayAdapter<SpannableString> adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_drawer);
try {
list = new Slots_GetSet(this).getAllCredentials();
} catch (Exception e) {
e.printStackTrace();
}
initStuffs();
if (savedInstanceState == null) {
new SliderMenuClickListener().displayView(0);
}
}
private void initStuffs() {
mTitle = mDrawerTitle = getTitle();
navMenuItems = getResources().getStringArray(R.array.Titles);
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
mDrawerList = (ListView) findViewById(R.id.list_slidermenu);
mRelativeLayout = (RelativeLayout) findViewById(R.id.rel_drawer);
navmenuItems = new SpannableString[navMenuItems.length];
for (int i = 0; i < navMenuItems.length; i++) {
navmenuItems[i] = new SpannableString(Html.fromHtml("<font color='#000000'>" + navMenuItems[i] + "</font>"));
}
adapter = new ArrayAdapter<SpannableString>(DrawerActivity.this, android.R.layout.simple_list_item_1, navmenuItems);
mDrawerList.setAdapter(adapter);
mDrawerToggle = new ActionBarDrawerToggle(DrawerActivity.this, mDrawerLayout, t, R.string.app_name, R.string.app_name) {
public void onDrawerClosed(View view) {
invalidateOptionsMenu();
}
public void onDrawerOpened(View view) {
invalidateOptionsMenu();
}
};
mDrawerLayout.setDrawerListener(mDrawerToggle);
mDrawerList.setOnItemClickListener(new SliderMenuClickListener());
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.drawer, menu);
return true;
}
@Override
public boolean onPrepareOptionsMenu(Menu menu) {
boolean drawerOpen = mDrawerLayout.isDrawerOpen(mRelativeLayout);
menu.findItem(R.id.action_settings).setVisible(!drawerOpen);
return super.onPrepareOptionsMenu(menu);
}
@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
mDrawerToggle.onConfigurationChanged(newConfig);
}
@Override
protected void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
mDrawerToggle.syncState();
}
@Override
public void setTitle(CharSequence title) {
super.setTitle(title);
mTitle = title;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (mDrawerToggle.onOptionsItemSelected(item)) {
return true;
}
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
private class SliderMenuClickListener implements ListView.OnItemClickListener {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
displayView(position);
}
private void displayView(int position) {
Fragment fragment = null;
switch (position) {
case 0:
String s = getSharedPreferences("Apple", Context.MODE_PRIVATE).getString("slots_down", "no");
if (s.equals("already")) {
fragment = new Fragment_slots(list);
} else if (s.equals("yes")) {
list = new Slots_GetSet(getApplicationContext()).getAllCredentials();
fragment = new Fragment_slots(list);
} else if (s.equals("no")) {
fragment = new HomeFragment();
}
break;
case 1:
fragment = new Photo_StudentLogin();
break;
case 2:
fragment = new HomeFragment();
break;
case 3:
fragment = MaterialVPFrag.newInstance();
break;
default:
fragment = new HomeFragment();
break;
}
if (fragment != null) {
FragmentManager fm = getSupportFragmentManager();
fm.beginTransaction().replace(R.id.frame_container, fragment).commit();
mDrawerList.setItemChecked(position, true);
mDrawerList.setSelection(position);
mDrawerLayout.closeDrawer(mRelativeLayout);
} else {
Log.e("DrawerActivity", "Error creating fragment");
}
}
}
}
谢谢！
答案 0 :(得分：3)
您使用的示例使用活动。您正在使用片段，这意味着您拥有 嵌套片段。
因此，您需要使用子片段管理器而不是支持片段管理器。所以而不是：
mViewPager.getViewPager().setAdapter(new FragmentStatePagerAdapter(getSupportFragmentManager())
到：
mViewPager.getViewPager().setAdapter(new FragmentStatePagerAdapter(getChildFragmentManager())
因为当你到达这一行时：
mViewPager.getViewPager().setOffscreenPageLimit(mViewPager.getViewPager().getAdapter().getCount());
您没有访问正确的适配器。您正在接收父母的适配器，同时拨打孩子的电话。 导致递归错误。
删除该行会导致适配器出错，因为您没有使用正确的片段管理器。
与讨论此事的问题的链接：
How to add a Fragment inside a ViewPager using Nested Fragment (Android 4.2)
Recursive entry to executePendingTransactions
ViewPager: Recursive entry to executePendingTransactions
如果您仍有问题，请告诉我。