android - My application closes suddenly before showing RecyclerView -

i working in recyclerview trying make recyclerview has 2 layout problem when run emulator , click button show items in recyclerview application closes here's code of adapter

package com.example.abdelmagied.myapplication;  import android.content.context; import android.database.cursor; import android.support.v7.widget.recyclerview; import android.view.layoutinflater; import android.view.view; import android.view.viewgroup; import android.widget.edittext; import android.widget.textview;  import java.util.arraylist;  /**  * created abdelmagied on 7/25/2017.  */ public class recycleradapter extends recyclerview.adapter<recyclerview.viewholder> {       public context context;     public cursor mycursor;     public arraylist<string> mydata;     private static final int view_type_dark = 0;     private static final int view_type_light = 1;      public recycleradapter(context context, arraylist<string> mydata) {         this.context = context;         this.mydata = mydata;     }      @override     public recyclerview.viewholder oncreateviewholder(viewgroup parent, int viewtype) {         int viewid;         switch (viewtype) {             case view_type_dark:                 viewid = r.layout.recycler_row_dark;                 break;             case view_type_light:                 viewid = r.layout.recycler_row_light;                 break;             default:                 throw new illegalargumentexception("invaild value type : " + viewtype);         }         view view = layoutinflater.from(context).inflate(viewid, parent, false);         if(viewid == view_type_dark){            return new viewholder0(view);        }else{            return new viewholder1(view);        }     }      @override     public void onbindviewholder(recyclerview.viewholder holder, int position) {          int typeid = getitemviewtype(position);          string xx  = mydata.get(position);          string[] x   = xx.split(",");            switch (holder.getitemviewtype())           {               case view_type_dark:{                   viewholder0 viewholder = (viewholder0) holder;                   viewholder.txt6.settext(x[1]);                   viewholder.txt7.settext(x[2]);                   break;               }               case view_type_light:{                   viewholder1 viewholder = (viewholder1) holder;                   viewholder.txt8.settext(x[1]);                   viewholder.txt9.settext(x[2]);                   break;               }           }     }       @override     public int getitemviewtype(int position) {         if (position % 2 == 0)             return view_type_dark;         return view_type_light;     }       @override     public int getitemcount() {         return mydata.size();     }       // recycler_row_light layout..    class viewholder0 extends recyclerview.viewholder    {       public textview txt6;        public textview txt7;        public viewholder0(view itemview) {            super(itemview);            txt6 = (textview) itemview.findviewbyid(r.id.textview6);            txt7 = (textview) itemview.findviewbyid(r.id.textview7);        }    }      // recycler_row_dark layout...     class viewholder1 extends recyclerview.viewholder{         public textview txt9;         public textview txt8;             public viewholder1(view itemview){                 super(itemview);                 txt8 = (textview) itemview.findviewbyid(r.id.textview8);                 txt9 = (textview) itemview.findviewbyid(r.id.textview9);             }     } } 

here' show activity @ adjust recyclerview

package com.example.abdelmagied.myapplication;  import android.database.cursor; import android.database.sqlite.sqlitedatabase; import android.support.v7.app.appcompatactivity; import android.os.bundle; import android.support.v7.widget.linearlayoutmanager; import android.support.v7.widget.recyclerview;  import java.util.arraylist;  public class show extends appcompatactivity{      public recyclerview mrecyclerview;     public recyclerview.layoutmanager mymanager;     public recyclerview.adapter myadapter;     @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.activity_show);           // fetch data database , put in arraylist         mydatabase database = new mydatabase(this);         cursor alldatabase  = database.getdata();         string data = "";         arraylist<string> mydata = new arraylist<string>();         while(alldatabase.movetonext()){             data += alldatabase.getstring(1);             data += ",";             data += alldatabase.getstring(2);             data += ",";             data += alldatabase.getstring(3);             data += ",";             data += alldatabase.getstring(4);             data += ",";             data += alldatabase.getstring(5);             mydata.add(data);             data = "";          }         mrecyclerview = (recyclerview) findviewbyid(r.id.recyclerid);         mymanager     = new linearlayoutmanager(this);         myadapter     = new recycleradapter(this , mydata);         mrecyclerview.setlayoutmanager(mymanager);         mrecyclerview.setadapter(myadapter);      }  } 

here's activity show contain recyclerview

<?xml version="1.0" encoding="utf-8"?> <relativelayout xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:tools="http://schemas.android.com/tools"     android:id="@+id/activity_show"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:paddingbottom="@dimen/activity_vertical_margin"     android:paddingleft="@dimen/activity_horizontal_margin"     android:paddingright="@dimen/activity_horizontal_margin"     android:paddingtop="@dimen/activity_vertical_margin"     tools:context="com.example.abdelmagied.myapplication.show">      <android.support.v7.widget.recyclerview         android:layout_width="match_parent"         android:layout_height="match_parent"         android:layout_alignparenttop="true"         android:layout_alignparentleft="true"         android:layout_alignparentstart="true"         android:id="@+id/recyclerid" />  </relativelayout> 

here's first layout called recycler_row_dark

<?xml version="1.0" encoding="utf-8"?> <linearlayout xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:app="http://schemas.android.com/apk/res-auto"     android:orientation="horizontal" android:layout_width="match_parent"     android:layout_height="wrap_content"     >      <linearlayout         android:layout_width="match_parent"         android:layout_height="wrap_content"         android:orientation="horizontal"         android:background="@android:color/holo_blue_bright"         android:id="@+id/textview8">          <imageview             android:layout_width="90dp"             android:layout_height="90dp"             app:srccompat="@android:drawable/stat_notify_missed_call"             android:id="@+id/imageview" />          <textview             android:text="name"             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:id="@+id/textview8"             android:textsize="35sp" />          <textview             android:text=": number"             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:id="@+id/textview9"             android:layout_weight="1"             android:textsize="25sp" />      </linearlayout>  </linearlayout> 

here's second layout called recycler_row_light

<?xml version="1.0" encoding="utf-8"?> <linearlayout xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:app="http://schemas.android.com/apk/res-auto"     android:orientation="horizontal" android:layout_width="match_parent"     android:layout_height="wrap_content"     >      <linearlayout     android:layout_width="match_parent"     android:layout_height="wrap_content"     android:orientation="horizontal"         android:background="@android:color/darker_gray">          <imageview             android:layout_width="90dp"             android:layout_height="90dp"             app:srccompat="@android:drawable/stat_notify_missed_call"             android:id="@+id/imageview" />          <textview             android:text="name"             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:id="@+id/textview6"             android:textsize="35sp" />          <textview             android:text=": number"             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:id="@+id/textview7"             android:layout_weight="1"             android:textsize="25sp" />      </linearlayout>  </linearlayout> 

here's photo of logcat

and photo when trying make debugging

change code this

cursor alldatabase  = database.getdata(); string data = ""; arraylist<string> mydata = new arraylist<string>();  if (alldatabase.movetofirst()) {   while(!alldatabase.isafterlast()) {    // if use alldatabase.movetonext() here, bypass first row, wrong     ...     alldatabase.movetonext();   }  } 

the problem not checking if cursor returns null value set or not. please check first , operation on that.

and log entry not helpful doesn't display app issue related logs.

update

one more problem in dark layout have given same id linear layout , textview both make correction also.