我的应用程序突然显示之前关闭RecyclerView

我在回收站查看我想使一个回收站有2布局，但问题是，当我运行模拟器，并单击按钮显示项目在recyclerview应用程序关闭突然 这里的适配器的代码我的应用程序突然显示之前关闭RecyclerView

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 by 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(); 
    } 


    // for the 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); 
     } 
    } 

    // for the 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); 
      } 
    } 
}

这里的演出活动，在我调整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 all data from the database and put it in an 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); 

    } 

}

这里的活动节目包含了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>

这里呼吁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>

第一布局这里是在S的Econd布局，称为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>

这里试图使调试

来源

2017-07-25 Abd EL Magied

logcat中有什么吗？ – litelite

@litelite是的有一些错误，我更新了问题与镜头 –

您发布的堆栈跟踪是不完整的。我们需要完整的错误信息。 – litelite

更改代码喜欢当是我的logcat

的照片，这张照片这

Cursor alldatabase = database.getData(); String data = ""; ArrayList<String> mydata = new ArrayList<String>(); if (alldatabase.moveToFirst()) { while(!alldatabase.isAfterLast()) { // If you use alldatabase.moveToNext() here, you will bypass the first row, which is WRONG ... alldatabase.moveToNext(); } }

问题是你没有检查游标是否返回空值设置或不。所以请先检查一下，然后再进行操作。

此日志条目也没有帮助，因为它不显示任何应用程序问题相关的日志。

更新

还有一个问题是你黑暗的布局你给同一个ID的线性布局和TextView的都这样做出修正也。

来源

2017-07-25 18:20:43 androidnoobdev

我的应用程序突然显示之前关闭RecyclerView

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