Menu
Actually, I have no idea why I have this error.
Follows the code hoping that there is everything useful for a diagnosis.
The structure of the app is a standard Navigation Drawer Activity with a Fragment inside. The Fragment has a RecyclerView.
The device used is Motorola XT1068 (Android 6.0, API 23).
Logcat
03-26 16:07:54.340 20272-20272/com.example.ves.gennaio3 E/AndroidRuntime: FATAL EXCEPTION: main Process: com.example.ves.gennaio3, PID: 20272 android.content.res.Resources$NotFoundException: Resource ID #0x7f07006e at android.content.res.Resources.getValue(Resources.java:1351) at android.support.v7.widget.AppCompatDrawableManager.loadDrawableFromDelegates(AppCompatDrawableManager.java:330) at android.support.v7.widget.AppCompatDrawableManager.getDrawable(AppCompatDrawableManager.java:195) at android.support.v7.widget.AppCompatDrawableManager.getDrawable(AppCompatDrawableManager.java:188) at android.support.v7.content.res.AppCompatResources.getDrawable(AppCompatResources.java:100) at android.support.v7.widget.AppCompatImageHelper.setImageResource(AppCompatImageHelper.java:85) at android.support.v7.widget.AppCompatImageView.setImageResource(AppCompatImageView.java:94) at com.example.ves.gennaio3.models.RecyclerViewAdapter.onBindViewHolder(RecyclerViewAdapter.java:38) at com.example.ves.gennaio3.models.RecyclerViewAdapter.onBindViewHolder(RecyclerViewAdapter.java:17) at android.support.v7.widget.RecyclerView$Adapter.onBindViewHolder(RecyclerView.java:6482) at android.support.v7.widget.RecyclerView$Adapter.bindViewHolder(RecyclerView.java:6515) at android.support.v7.widget.RecyclerView$Recycler.tryBindViewHolderByDeadline(RecyclerView.java:5458) at android.support.v7.widget.RecyclerView$Recycler.tryGetViewHolderForPositionByDeadline(RecyclerView.java:5724) at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:5563) at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:5559) at android.support.v7.widget.LinearLayoutManager$LayoutState.next(LinearLayoutManager.java:2229) at android.support.v7.widget.LinearLayoutManager.layoutChunk(LinearLayoutManager.java:1556) at android.support.v7.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1516) at android.support.v7.widget.LinearLayoutManager.onLayoutChildren(LinearLayoutManager.java:608) at android.support.v7.widget.RecyclerView.dispatchLayoutStep2(RecyclerView.java:3693) at android.support.v7.widget.RecyclerView.dispatchLayout(RecyclerView.java:3410) at android.support.v7.widget.RecyclerView.onLayout(RecyclerView.java:3962) at android.view.View.layout(View.java:16646) at android.view.ViewGroup.layout(ViewGroup.java:5440) at android.widget.RelativeLayout.onLayout(RelativeLayout.java:1079) at android.view.View.layout(View.java:16646) at android.view.ViewGroup.layout(ViewGroup.java:5440) at android.widget.FrameLayout.layoutChildren(FrameLayout.java:336) at android.widget.FrameLayout.onLayout(FrameLayout.java:273) at android.view.View.layout(View.java:16646) at android.view.ViewGroup.layout(ViewGroup.java:5440) at android.widget.RelativeLayout.onLayout(RelativeLayout.java:1079) at android.view.View.layout(View.java:16646) at android.view.ViewGroup.layout(ViewGroup.java:5440) at android.support.design.widget.CoordinatorLayout.layoutChild(CoordinatorLayout.java:1166) at android.support.design.widget.CoordinatorLayout.onLayoutChild(CoordinatorLayout.java:851) at android.support.design.widget.CoordinatorLayout.onLayout(CoordinatorLayout.java:870) at android.view.View.layout(View.java:16646) at android.view.ViewGroup.layout(ViewGroup.java:5440) at android.support.v4.widget.DrawerLayout.onLayout(DrawerLayout.java:1172) at android.view.View.layout(View.java:16646) at android.view.ViewGroup.layout(ViewGroup.java:5440) at android.widget.FrameLayout.layoutChildren(FrameLayout.java:336) at android.widget.FrameLayout.onLayout(FrameLayout.java:273) at android.view.View.layout(View.java:16646) at android.view.ViewGroup.layout(ViewGroup.java:5440) at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1743) at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1586) at android.widget.LinearLayout.onLayout(LinearLayout.java:1495) at android.view.View.layout(View.java:16646) at android.view.ViewGroup.layout(ViewGroup.java:5440) at android.widget.FrameLayout.layoutChildren(FrameLayout.java:336) a 03-26 16:07:55.215 15332-18804/? E/AudioRecord-JNI: Error -4 during AudioRecord native read Dependencies
dependencies { implementation fileTree(dir: 'libs', include: ['*.jar']) implementation 'com.android.support:appcompat-v7:26.1.0' implementation 'com.android.support:cardview-v7:26.1.0' implementation 'com.android.support:design:26.1.0' implementation 'com.android.support.constraint:constraint-layout:1.0.2' implementation 'com.android.support:support-v4:26.1.0' implementation 'com.android.support:recyclerview-v7:26.1.0' testImplementation 'junit:junit:4.12' androidTestImplementation 'com.android.support.test:runner:1.0.1' androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1' } MainActivity.java
package com.example.ves.gennaio3; import android.net.Uri; import android.os.Bundle; import android.support.design.widget.NavigationView; import android.support.v4.view.GravityCompat; import android.support.v4.widget.DrawerLayout; import android.support.v7.app.ActionBarDrawerToggle; import android.support.v7.app.AppCompatActivity; import android.support.v7.widget.Toolbar; import android.view.Menu; import android.view.MenuItem; public class MainActivity extends AppCompatActivity implements CardFragment.OnFragmentInteractionListener, NavigationView.OnNavigationItemSelectedListener { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); setSupportActionBar(toolbar); DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout); ActionBarDrawerToggle toggle = new ActionBarDrawerToggle( this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close); drawer.addDrawerListener(toggle); toggle.syncState(); NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view); navigationView.setNavigationItemSelectedListener(this); if(findViewById(R.id.fragment_container)!=null) { if (savedInstanceState!=null) {return;} CardFragment cardFragment = new CardFragment(); getSupportFragmentManager().beginTransaction() .add(R.id.fragment_container, cardFragment).commit(); } } @Override public void onBackPressed() { DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout); if (drawer.isDrawerOpen(GravityCompat.START)) { drawer.closeDrawer(GravityCompat.START); } else { super.onBackPressed(); } } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.main, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { // Handle action bar item clicks here. The action bar will // automatically handle clicks on the Home/Up button, so long // as you specify a parent activity in AndroidManifest.xml. int id = item.getItemId(); //noinspection SimplifiableIfStatement if (id == R.id.action_settings) { return true; } return super.onOptionsItemSelected(item); } @SuppressWarnings("StatementWithEmptyBody") @Override public boolean onNavigationItemSelected(MenuItem item) { int id = item.getItemId(); if (id == R.id.nav_camera) { } else if (id == R.id.nav_gallery) { } else if (id == R.id.nav_slideshow) { } else if (id == R.id.nav_manage) { } else if (id == R.id.nav_share) { } else if (id == R.id.nav_send) { } DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout); drawer.closeDrawer(GravityCompat.START); return true; } @Override public void onFragmentInteraction(Uri uri) { } } CardFragment.java
package com.example.ves.gennaio3; import android.content.Context; import android.net.Uri; import android.os.Bundle; import android.support.v4.app.Fragment; import android.support.v7.widget.LinearLayoutManager; import android.support.v7.widget.RecyclerView; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import com.example.ves.gennaio3.models.ItemObject; import com.example.ves.gennaio3.models.RecyclerViewAdapter; import java.util.ArrayList; import java.util.List; /** * A simple {@link Fragment} subclass. * Activities that contain this fragment must implement the * {@link CardFragment.OnFragmentInteractionListener} interface * to handle interaction events. * Use the {@link CardFragment#newInstance} factory method to * create an instance of this fragment. */ public class CardFragment extends Fragment { private RecyclerView mRecyclerView; private RecyclerView.LayoutManager mLayoutManager; // TODO: Rename parameter arguments, choose names that match // the fragment initialization parameters, e.g. ARG_ITEM_NUMBER private static final String ARG_PARAM1 = "param1"; private static final String ARG_PARAM2 = "param2"; // TODO: Rename and change types of parameters private String mParam1; private String mParam2; private OnFragmentInteractionListener mListener; public CardFragment() { // Required empty public constructor } /** * Use this factory method to create a new instance of * this fragment using the provided parameters. * * @param param1 Parameter 1. * @param param2 Parameter 2. * @return A new instance of fragment CardFragment. */ // TODO: Rename and change types and number of parameters public static CardFragment newInstance(String param1, String param2) { CardFragment fragment = new CardFragment(); Bundle args = new Bundle(); args.putString(ARG_PARAM1, param1); args.putString(ARG_PARAM2, param2); fragment.setArguments(args); return fragment; } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); if (getArguments() != null) { mParam1 = getArguments().getString(ARG_PARAM1); mParam2 = getArguments().getString(ARG_PARAM2); } } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View rootView = inflater.inflate(R.layout.fragment_card, container, false); rootView.setTag("CardFragment"); List<ItemObject> rowListItem = getAllItemList(); mRecyclerView = (RecyclerView) rootView.findViewById(R.id.recycler_view); mLayoutManager = new LinearLayoutManager(getActivity()); mRecyclerView.setLayoutManager(mLayoutManager); RecyclerViewAdapter mAdapter = new RecyclerViewAdapter(getActivity(), rowListItem); mRecyclerView.setAdapter(mAdapter); return rootView; } // TODO: Rename method, update argument and hook method into UI event 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; } /** * This interface must be implemented by activities that contain this * fragment to allow an interaction in this fragment to be communicated * to the activity and potentially other fragments contained in that * activity. * <p> * See the Android Training lesson <a href= * "http://developer.android.com/training/basics/fragments/communicating.html" * >Communicating with Other Fragments</a> for more information. */ public interface OnFragmentInteractionListener { // TODO: Update argument type and name void onFragmentInteraction(Uri uri); } private List<ItemObject> getAllItemList(){ List<ItemObject> allItems = new ArrayList<ItemObject>(); allItems.add(new ItemObject("United States", R.drawable.newyork)); allItems.add(new ItemObject("Canada", R.drawable.canada)); allItems.add(new ItemObject("United Kingdom", R.drawable.uk)); allItems.add(new ItemObject("Germany", R.drawable.germany)); allItems.add(new ItemObject("Sweden", R.drawable.sweden)); return allItems; } } activity_main.xml
<?xml version="1.0" encoding="utf-8"?> <android.support.v4.widget.DrawerLayout 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:id="@+id/drawer_layout" android:layout_width="match_parent" android:layout_height="match_parent" android:fitsSystemWindows="true" tools:openDrawer="start"> <include layout="@layout/app_bar_main" android:layout_width="match_parent" android:layout_height="match_parent" /> <android.support.design.widget.NavigationView android:id="@+id/nav_view" android:layout_width="wrap_content" android:layout_height="match_parent" android:layout_gravity="start" android:fitsSystemWindows="true" app:headerLayout="@layout/nav_header_main" app:menu="@menu/activity_main_drawer" /> </android.support.v4.widget.DrawerLayout> app_bar_main.xml
<?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" tools:context="com.example.ves.gennaio3.MainActivity"> <android.support.design.widget.AppBarLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:theme="@style/AppTheme.AppBarOverlay"> <android.support.v7.widget.Toolbar android:id="@+id/toolbar" android:layout_width="match_parent" android:layout_height="?attr/actionBarSize" android:background="?attr/colorPrimary" app:popupTheme="@style/AppTheme.PopupOverlay" /> </android.support.design.widget.AppBarLayout> <RelativeLayout android:layout_width="match_parent" android:layout_height="match_parent" android:id="@+id/fragment_container"> </RelativeLayout> </android.support.design.widget.CoordinatorLayout> fragment_card.xml
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="com.example.ves.gennaio3.CardFragment"> <RelativeLayout android:layout_height="match_parent" android:layout_width="match_parent"> <android.support.v7.widget.RecyclerView android:layout_height="match_parent" android:layout_width="match_parent" android:id="@+id/recycler_view" android:scrollbars="vertical"/> </RelativeLayout> </FrameLayout> UPDATE
card_view_list.xml (my RecycleView item layout)
<?xml version="1.0" encoding="utf-8"?> <android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android" android:layout_marginBottom="16dp" android:layout_height="wrap_content" android:layout_width="match_parent" android:id="@+id/card_view"> <RelativeLayout android:layout_height="match_parent" android:layout_width="match_parent"> <ImageView android:layout_height="wrap_content" android:layout_width="match_parent" android:id="@+id/country_photo" android:scaleType="centerCrop" android:layout_centerInParent="true" android:contentDescription="@string/action_settings"/> <TextView android:id="@+id/country_name" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_alignParentTop="true" android:layout_marginLeft="4dp" android:gravity="center" android:text="Nigeria" android:textSize="30sp" android:textStyle="bold" /> <Button android:id="@+id/button" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:layout_alignParentEnd="true" android:layout_alignParentRight="true" android:layout_marginBottom="13dp" android:layout_marginEnd="12dp" android:layout_marginRight="12dp" android:text="Get" /> </RelativeLayout> </android.support.v7.widget.CardView> RecyclerViewAdapter.java
package com.example.ves.gennaio3.models; import android.content.Context; import android.support.v7.widget.RecyclerView; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import com.example.ves.gennaio3.R; import java.util.List; /** * Created by VES on 03/02/2018. */ public class RecyclerViewAdapter extends RecyclerView.Adapter<RecyclerViewHolders>{ private List<ItemObject> itemList; private Context context; public RecyclerViewAdapter(Context context, List<ItemObject> itemList) { this.itemList = itemList; this.context = context; } @Override public RecyclerViewHolders onCreateViewHolder(ViewGroup parent, int viewType) { View layoutView = LayoutInflater.from(parent.getContext()).inflate(R.layout.card_view_list, null); RecyclerViewHolders rcv = new RecyclerViewHolders(layoutView); return rcv; } @Override public void onBindViewHolder(RecyclerViewHolders holder, int position) { holder.countryName.setText(itemList.get(position).getName()); holder.countryPhoto.setImageResource(itemList.get(position).getPhoto()); } @Override public int getItemCount() { return this.itemList.size(); } } RecyclerViewHolders.java
package com.example.ves.gennaio3.models; import android.support.v7.widget.RecyclerView; import android.view.View; import android.widget.Button; import android.widget.ImageView; import android.widget.TextView; import android.widget.Toast; import com.example.ves.gennaio3.R; /** * Created by VES on 03/02/2018. */ public class RecyclerViewHolders extends RecyclerView.ViewHolder implements View.OnClickListener{ public TextView countryName; public ImageView countryPhoto; public Button button; public RecyclerViewHolders(final View itemView) { super(itemView); itemView.setOnClickListener(this); countryName = (TextView)itemView.findViewById(R.id.country_name); countryPhoto = (ImageView)itemView.findViewById(R.id.country_photo); button = (Button)itemView.findViewById(R.id.button); button.setOnClickListener(new View.OnClickListener(){ public void onClick(View v) { Toast.makeText(itemView.getContext(), "questa è prova", Toast.LENGTH_SHORT).show(); } }); } @Override public void onClick(View view) { Toast.makeText(view.getContext(), "Clicked Country Position = " + getPosition(), Toast.LENGTH_SHORT).show(); } } UPDATE
One of the answers suggests that the problem could be related to getAllItems(). But resources invoked seem to be correctly loaded.
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Resource ID. A unique resource name for the element, which you can use to obtain a reference to the ViewGroup from your application. See more about the value for android:id below. android:layout_height.
Resources are the additional files and static content that your code uses, such as bitmaps, layout definitions, user interface strings, animation instructions, and more.
Resource Manager is a tool window for importing, creating, managing, and using resources in your app. You can open the tool window by selecting View > Tool Windows > Resource Manager from the menu bar or by selecting Resource Manager on the left side bar.
Your problem is the wrong placement of resources(images). You use (API 23) but resources for API 23 is null, because they only API 24 and up.
Now all images marked (v24) this means that they are in drawables-v24 just move in drawable
that'll solve your problem.
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