ListView에 강제 종료가 있습니다

Question

저는 초보자이며 ListView를 배우고 싶습니다. 그걸 검색하고 목록보기를 만들려고했습니다.

하지만 불행히도 처음에는 힘이 가깝습니다.

여기

public class CustomListView extends BaseAdapter{ 

    private ArrayList<ItemClass> arr = new ArrayList<ItemClass>(); 

    public CustomListView(ArrayList<ItemClass> arr) { 
     this.arr = arr; 
    } 

    @Override 
    public int getCount() { 
     return arr.size(); 
    } 

    @Override 
    public Object getItem(int index) { 
     return getItem(index); 
    } 

    @Override 
    public long getItemId(int index) { 
     return index; 
    } 

    @Override 
    public View getView(int index, View view, ViewGroup parent) { 

     if(view == null) 
     { 
      LayoutInflater inflator = LayoutInflater.from(parent.getContext()); 
      view = inflator.inflate(R.layout.list_row, parent, false); 
     } 

     ItemClass child = arr.get(index); 
     TextView Text = (TextView) view.findViewById(R.id.groupTitle); 
     Text.setText(child.getName()); 
     return null; 
    } 

} 

메인 클래스는 다음과 같습니다 : 여기

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
android:layout_width="fill_parent" 
android:layout_height="wrap_content" 
android:orientation="vertical"> 

    <TextView android:id="@+id/groupTitle" 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:textSize="12dp" /> 

</LinearLayout> 

가 CustomListView.java입니다 :

여기

<ListView xmlns:android="http://schemas.android.com/apk/res/android" 
xmlns:tools="http://schemas.android.com/tools" 
android:layout_width="fill_parent" 
android:layout_height="fill_parent" 
android:id="@+id/List"/> 

가 list_row.xml입니다 : 여기

는 activity_main.xml입니다

public class MainActivity extends Activity { 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 

     ArrayList<ItemClass> arr = new ArrayList<ItemClass>(); 
     arr.add(new ItemClass("Sh " , 1)); 
     CustomListView adaptor; 
     adaptor = new CustomListView(arr); 

     ListView listView = (ListView) findViewById(R.id.List); 

     listView.setAdapter(adaptor); 
    } 
} 

그때 listView.setAdapter(adaptor);를 댓글을 달았가 더 힘 가까운 없었다

public class ItemClass { 

    //private Context context; 
    String name; 
    private int rate; 

    public ItemClass(String name , int rate) { 
     this.setName(name); 
     this.setRate(rate); 
    } 

    public void setName(String name) { 
     this.name = name; 
    } 

    public String getName() { 
     return this.name; 
    } 

    public void setRate(int rate) { 
     this.rate = rate; 
    } 

    public int getRate() { 
     return this.rate; 
    } 
} 

: 마침내 여기 16,

및 ItemClass.java입니다.

아무도 나를 도울 수 있습니까 ?? 관심

Answer 1

먼저 사전에

덕분에 당신은 당신이 당신의 Adapter

Answer 2

public class ListViewAdapter extends BaseAdapter{ 
    private ArrayList<String> listname; 
    private ArrayList<Integer> listimg; 
    private ArrayList<String> listtype; 
    private Activity activity; 
    public ListViewAdapter(Activity act,ArrayList<String> liststr,ArrayList<Integer> listint,ArrayList<String> list_type) 
    { 


     super(); 
     this.listname=new ArrayList<String>(); 
     this.listname=liststr; 
     this.listimg=listint; 
     this.listtype=list_type; 
     this.activity=act; 
     System.out.println("this is contry name "+this.listname); 
     System.out.println("this is img name "+this.listimg); 
     System.out.println("this is type "+this.listtype); 
    } 


    @Override 
    public int getCount() { 
     // TODO Auto-generated method stub 
     System.out.println("len " + listname.size()); 
     return listname.size(); 
    } 

    @Override 
    public Object getItem(int position) { 
     // TODO Auto-generated method stub 
     return listname.get(position); 
    } 

    @Override 
    public long getItemId(int arg0) { 
     // TODO Auto-generated method stub 
     return 0; 
    } 
    public static class ViewHolder { 
     public ImageView imgViewFlag; 
     public TextView txtViewTitle; 
     public TextView txtViewType; 
    } 
    @Override 
    public View getView(int position, View convertView, ViewGroup parent) { 
     // TODO Auto-generated method stub 
     ViewHolder view; 
     LayoutInflater inflator = activity.getLayoutInflater(); 

     if (convertView == null) { 
      view = new ViewHolder(); 
      convertView = inflator.inflate(R.layout.notes_listlayout, null); 

      view.txtViewTitle = (TextView) convertView 
        .findViewById(R.id.note_layout_name); 

      //view.txtViewTitle.setText("NO Notes Available."); 
      view.txtViewType= (TextView) convertView 
        .findViewById(R.id.note_layout_type); 
      view.txtViewType.setTypeface(Typeface.createFromAsset(parent 
        .getContext().getAssets(), "fonts/DroidSerif.ttf")); 
      view.txtViewTitle.setTypeface(Typeface.createFromAsset(parent 
        .getContext().getAssets(), "fonts/DroidSerif.ttf")); 
     // view.txtViewTitle.setTextColor(Color.BLACK); 
      //view.txtViewType.setTextColor(Color.GRAY); 
      /*TextView emptyView = (TextView)findViewById(R.id.emptyTv); 
      view.setEmptyView(yourEmptyView);*/ 
      view.imgViewFlag = (ImageView) convertView 
        .findViewById(R.id.note_layout_img); 

     // view.imgViewFlag.setBackgroundResource(R.drawable.view_default); 
      convertView.setTag(view); 
     } 



     else { 
      view = (ViewHolder) convertView.getTag(); 
     } 
     System.gc(); 
     try { 
      view.txtViewTitle.setText(listname.get(position)); 
      view.txtViewType.setText(listtype.get(position)); 
      view.imgViewFlag.setImageResource(listimg.get(position)); 

     } catch (Exception e) { 
      //System.out.println("this is error " + e.getMessage()); 
     } 

     return convertView; 
    } 

} 

에 getView(....) 방법에 view

return view; 

대신

return null; 

의 반환해야이 문제를 해결

구현에

당신은 아래와 어댑터 클래스에 getItem 방법을 변경해야

ListViewAdapter mAdapter; 
mAdapter = new ListViewAdapter(this, listCountry, listFlag, 
       listfoodtype); 
     lv_note = (ListView) findViewById(R.id.lv_note); 
     // gridView.setBackgroundColor(Color.WHITE); 

     lv_note.setAdapter(mAdapter); 

Answer 3

아래로 널 (null) 이외의 사용자 정의보기를 반환하는

@Override 
public Object getItem(int index) { 
    return arr.get(index); 
} 

을 또한 당신의 getView 방법을 변경 :

@Override 
public View getView(int index, View view, ViewGroup parent) { 

    if(view == null) 
    { 
     LayoutInflater inflator = LayoutInflater.from(parent.getContext()); 
     view = inflator.inflate(R.layout.list_row, parent, false); 
    } 
    //............................. 
    return view; 
}