Android应用程序在打开片段时停止

当在第二个活动中单击某个项目时，我有一个带有列表的应用程序 打开一个可滚动的界面，其中有一个片段。没有 加载片段应用程序工作正常，但当我想加载 它停止了

dividetailsFragment.Java

 package be.gillescoeman.scubajournal;

 import android.content.Context;
 import android.net.Uri;
 import android.os.Bundle;
 // import android.app.Fragment;
 import android.support.v4.app.Fragment;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;


 /**
  * A simple {@link Fragment} subclass.
  * Activities that contain this fragment must implement the
  * {@link DiveDetailsFragment.OnFragmentInteractionListener} interface
  * to handle interaction events.
  * Use the {@link DiveDetailsFragment#newInstance} factory method to
  * create an instance of this fragment.
  */
 public class DiveDetailsFragment extends Fragment {
     private OnFragmentInteractionListener mListener;

     public DiveDetailsFragment() {
         // Required empty public constructor
     }

     public static DiveDetailsFragment newInstance() {
         DiveDetailsFragment fragment = new DiveDetailsFragment();
         return fragment;
     }

     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
     }

     @Override
     public View onCreateView(LayoutInflater inflater, ViewGroup container,
                              Bundle savedInstanceState) {
         // Inflate the layout for this fragment
         return inflater.inflate(R.layout.fragment_dive_details, container, false);
     }

     public void onButtonPressed(Uri uri) {
         if (mListener != null) {
             mListener.onFragmentInteraction(uri);
         }
     }

     @Override
     public void onAttach(Context context) {
         super.onAttach(context);
         if (context instanceof OnFragmentInteractionListener) {
             mListener = (OnFragmentInteractionListener) context;
         } else {
             throw new RuntimeException(context.toString()
                     + " must implement OnFragmentInteractionListener");
         }
     }

     @Override
     public void onDetach() {
         super.onDetach();
         mListener = null;
     }

     public interface OnFragmentInteractionListener {
         // TODO: Update argument type and name
         void onFragmentInteraction(Uri uri);
     }
 }

 package be.gillescoeman.scubajournal;

 // import android.app.Fragment;
 // import android.app.FragmentTransaction;
 import android.support.v4.app.Fragment;
 import android.support.v4.app.FragmentManager;
 import android.os.Bundle;
 import android.support.design.widget.FloatingActionButton;
 import android.support.design.widget.Snackbar;
 import android.support.v7.app.AppCompatActivity;
 import android.support.v7.widget.Toolbar;
 import android.view.View;

 public class DiveDetailsActivity extends AppCompatActivity {

     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_dive_details);
         Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
         setSupportActionBar(toolbar);

 //        FragmentTransaction ft = getFragmentManager().beginTransaction();
 //        Fragment diveDetailsFragment = DiveDetailsFragment.newInstance();
 //        ft.add(R.id.diveDetailsFragmentContainer, diveDetailsFragment);
 //        ft.commit();

         FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
         fab.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View view) {
                 Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
                         .setAction("Action", null).show();
             }
         });

 //        if (savedInstanceState == null) {
 //            getSupportFragmentManager()
 //                    .beginTransaction()
 //                    .add(R.id.diveDetailsFragmentContainer, DiveDetailsFragment.newInstance(), "DiveDetails")
 //                    .commit();
 //        }

         if (findViewById(R.id.diveDetailsFragmentContainer) != null) {
             if (savedInstanceState != null) {
                 return;
             }

             // Create an instance of AddServerFragment
             DiveDetailsFragment fragment = new DiveDetailsFragment();

             // Add the fragment to the 'fragment_container' FrameLayout
             getSupportFragmentManager().beginTransaction()
                     .add(R.id.diveDetailsFragmentContainer, fragment).commit();
         }
     }
 }

DiveDetailsActivity.Java

 package be.gillescoeman.scubajournal;

 import android.content.Context;
 import android.net.Uri;
 import android.os.Bundle;
 // import android.app.Fragment;
 import android.support.v4.app.Fragment;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;


 /**
  * A simple {@link Fragment} subclass.
  * Activities that contain this fragment must implement the
  * {@link DiveDetailsFragment.OnFragmentInteractionListener} interface
  * to handle interaction events.
  * Use the {@link DiveDetailsFragment#newInstance} factory method to
  * create an instance of this fragment.
  */
 public class DiveDetailsFragment extends Fragment {
     private OnFragmentInteractionListener mListener;

     public DiveDetailsFragment() {
         // Required empty public constructor
     }

     public static DiveDetailsFragment newInstance() {
         DiveDetailsFragment fragment = new DiveDetailsFragment();
         return fragment;
     }

     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
     }

     @Override
     public View onCreateView(LayoutInflater inflater, ViewGroup container,
                              Bundle savedInstanceState) {
         // Inflate the layout for this fragment
         return inflater.inflate(R.layout.fragment_dive_details, container, false);
     }

     public void onButtonPressed(Uri uri) {
         if (mListener != null) {
             mListener.onFragmentInteraction(uri);
         }
     }

     @Override
     public void onAttach(Context context) {
         super.onAttach(context);
         if (context instanceof OnFragmentInteractionListener) {
             mListener = (OnFragmentInteractionListener) context;
         } else {
             throw new RuntimeException(context.toString()
                     + " must implement OnFragmentInteractionListener");
         }
     }

     @Override
     public void onDetach() {
         super.onDetach();
         mListener = null;
     }

     public interface OnFragmentInteractionListener {
         // TODO: Update argument type and name
         void onFragmentInteraction(Uri uri);
     }
 }

 package be.gillescoeman.scubajournal;

 // import android.app.Fragment;
 // import android.app.FragmentTransaction;
 import android.support.v4.app.Fragment;
 import android.support.v4.app.FragmentManager;
 import android.os.Bundle;
 import android.support.design.widget.FloatingActionButton;
 import android.support.design.widget.Snackbar;
 import android.support.v7.app.AppCompatActivity;
 import android.support.v7.widget.Toolbar;
 import android.view.View;

 public class DiveDetailsActivity extends AppCompatActivity {

     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_dive_details);
         Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
         setSupportActionBar(toolbar);

 //        FragmentTransaction ft = getFragmentManager().beginTransaction();
 //        Fragment diveDetailsFragment = DiveDetailsFragment.newInstance();
 //        ft.add(R.id.diveDetailsFragmentContainer, diveDetailsFragment);
 //        ft.commit();

         FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
         fab.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View view) {
                 Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
                         .setAction("Action", null).show();
             }
         });

 //        if (savedInstanceState == null) {
 //            getSupportFragmentManager()
 //                    .beginTransaction()
 //                    .add(R.id.diveDetailsFragmentContainer, DiveDetailsFragment.newInstance(), "DiveDetails")
 //                    .commit();
 //        }

         if (findViewById(R.id.diveDetailsFragmentContainer) != null) {
             if (savedInstanceState != null) {
                 return;
             }

             // Create an instance of AddServerFragment
             DiveDetailsFragment fragment = new DiveDetailsFragment();

             // Add the fragment to the 'fragment_container' FrameLayout
             getSupportFragmentManager().beginTransaction()
                     .add(R.id.diveDetailsFragmentContainer, fragment).commit();
         }
     }
 }

fragment\u dive\u details.xml

 <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="wrap_content"
     android:layout_height="wrap_content"
     tools:context="be.gillescoeman.scubajournal.DiveDetailsFragment"
     class="be.gillescoeman.scubajournal.DiveDetailsFragment">

     <!-- TODO: Update blank fragment layout -->
     <TextView
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:text="@string/hello_blank_fragment" />

     <TextView
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_margin="@dimen/text_margin"
         android:text="@string/large_text" />

 </FrameLayout>

 <?xml version="1.0" encoding="utf-8"?>
 <android.support.v4.widget.NestedScrollView 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"
     app:layout_behavior="@string/appbar_scrolling_view_behavior"
     tools:context="be.gillescoeman.scubajournal.DiveDetailsActivity"
     tools:showIn="@layout/activity_dive_details">

     <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
         android:id="@+id/diveDetailsFragmentContainer"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content" />

 </android.support.v4.widget.NestedScrollView>

 <?xml version="1.0" encoding="utf-8"?>
 <android.support.design.widget.CoordinatorLayout 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"
     android:fitsSystemWindows="true"
     tools:context="be.gillescoeman.scubajournal.DiveDetailsActivity">

     <android.support.design.widget.AppBarLayout
         android:id="@+id/app_bar"
         android:layout_width="match_parent"
         android:layout_height="@dimen/app_bar_height"
         android:fitsSystemWindows="true"
         android:theme="@style/AppTheme.AppBarOverlay">

         <android.support.design.widget.CollapsingToolbarLayout
             android:id="@+id/toolbar_layout"
             android:layout_width="match_parent"
             android:layout_height="match_parent"
             android:fitsSystemWindows="true"
             app:contentScrim="?attr/colorPrimary"
             app:layout_scrollFlags="scroll|exitUntilCollapsed">

             <android.support.v7.widget.Toolbar
                 android:id="@+id/toolbar"
                 android:layout_width="match_parent"
                 android:layout_height="?attr/actionBarSize"
                 app:layout_collapseMode="pin"
                 app:popupTheme="@style/AppTheme.PopupOverlay" />

         </android.support.design.widget.CollapsingToolbarLayout>
     </android.support.design.widget.AppBarLayout>

     <include layout="@layout/content_dive_details" />

     <android.support.design.widget.FloatingActionButton
         android:id="@+id/fab"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_margin="@dimen/fab_margin"
         app:layout_anchor="@id/app_bar"
         app:layout_anchorGravity="bottom|end"
         app:srcCompat="@android:drawable/ic_dialog_email" />

 </android.support.design.widget.CoordinatorLayout>

---

Fragment

中的下一行假定所附加的活动将实现

OnFragmentInteractionListener

接口

mListener = (OnFragmentInteractionListener) context;

您需要更改：

public class DiveDetailsActivity extends AppCompatActivity {

致：

---

并实现

OnFragmentInteractionListener

中的所有抽象方法，这些方法可能是空的，但这对这个问题无关紧要。

实际上删除

onAttach（）

和

onDetach（）

方法似乎起到了关键作用，回复此处所需的queryerror日志会有所帮助。阅读您的日志后，您的问题的正确答案是下面的Kamran Ahmed的答案。看看他的解决方案。