ArrayAdapter가있는 ListView, 행을 클릭하면 예외가 발생합니다.

Question

ArrayAdapter를 사용하여 listView를 만들고 있습니다. 각 뷰에는 4 개의 TextView와 ImageButton이 있습니다. 행을 클릭하면 표에 데이터가 표시되고 행에있는 imageButton을 클릭하면 사용자가 다른 활동으로 이동합니다.

내 문제는 : 내가 목록을 스크롤하고 내가합니다 (beggining에서 목록의 보이는 부분에 없었다)을하여 ImageButton을 클릭하면 내가 여기

07-23 11:07:50.150: E/AndroidRuntime(9326): FATAL EXCEPTION: main 
07-23 11:07:50.150: E/AndroidRuntime(9326): java.lang.IllegalStateException: Could not execute method of the activity 
07-23 11:07:50.150: E/AndroidRuntime(9326):  atandroid.view.View$1.onClick(View.java:2700) 
07-23 11:07:50.150: E/AndroidRuntime(9326):at ndroid.view.View.performClick(View.java:3127) 
07-23 11:07:50.150: E/AndroidRuntime(9326): at android.view.View$PerformClick.run(View.java:12025) 
07-23 11:07:50.150: E/AndroidRuntime(9326):  at android.os.Handler.handleCallback(Handler.java:587) 
07-23 11:07:50.150: E/AndroidRuntime(9326):  at android.os.Handler.dispatchMessage(Handler.java:92) 
07-23 11:07:50.150: E/AndroidRuntime(9326):  at android.os.Looper.loop(Looper.java:132) 
07-23 11:07:50.150: E/AndroidRuntime(9326):  at android.app.ActivityThread.main(ActivityThread.java:4126) 
07-23 11:07:50.150: E/AndroidRuntime(9326):  at java.lang.reflect.Method.invokeNative(Native Method) 
07-23 11:07:50.150: E/AndroidRuntime(9326):  at java.lang.reflect.Method.invoke(Method.java:491) 
07-23 11:07:50.150: E/AndroidRuntime(9326):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:844) 
07-23 11:07:50.150: E/AndroidRuntime(9326):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:602) 
07-23 11:07:50.150: E/AndroidRuntime(9326):  at dalvik.system.NativeStart.main(Native Method) 
07-23 11:07:50.150: E/AndroidRuntime(9326): Caused by: java.lang.reflect.InvocationTargetException 
07-23 11:07:50.150: E/AndroidRuntime(9326):  at java.lang.reflect.Method.invokeNative(Native Method) 
07-23 11:07:50.150: E/AndroidRuntime(9326):  at java.lang.reflect.Method.invoke(Method.java:491) 
07-23 11:07:50.150: E/AndroidRuntime(9326):  at android.view.View$1.onClick(View.java:2695) 
07-23 11:07:50.150: E/AndroidRuntime(9326):  ... 11 more 
07-23 11:07:50.150: E/AndroidRuntime(9326): Caused by: java.lang.NullPointerException 
07-23 11:07:50.150: E/AndroidRuntime(9326):  at com.android.androidlistview.MainActivity.MyHandler(MainActivity.java:48) 

내 코드에서 예외가있다 :

MainActivity :

public class MainActivity extends ListActivity { 

private ListView listView; 

private String id; 
private static final int REQUEST_CODE = 1; 
private AccountNameListAdapter adapter; 

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

    ArrayList<Account> accountData = new ArrayList<Account>(); 
    for (int i = 0; i < 50; i++) { 
     Account account = new Account("n" + i, "test", "0154654654", 
       "gdfg", "gfdg", "2635454564"); 
     accountData.add(account); 
    } 

    adapter = new AccountNameListAdapter(this, R.layout.list_detail, 
      accountData); 

    listView = this.getListView(); 
    listView.setAdapter(adapter); 

} 

public void MyHandler(View v) { 
    ImageButton cb = (ImageButton) v; 

    int position = Integer.parseInt(cb.getTag().toString()); 


    View o = listView.getChildAt(position).findViewById(R.id.blocCheck); 

    TextView t = (TextView) listView.getChildAt(position).findViewById(
      R.id.id); 
    Toast.makeText(getApplicationContext(), t.getText(), Toast.LENGTH_LONG) 
      .show(); 

    Intent editIntent = new Intent(MainActivity.this, EditActivity.class); 
    editIntent.putExtra("accountId", t.getText()); 
    startActivityForResult(editIntent, REQUEST_CODE); 

} 

@Override 
public void onActivityResult(int requestCode, int resultCode, Intent data) { 
    super.onActivityResult(requestCode, resultCode, data); 
    if (resultCode == RESULT_OK) { 

     final Account account = new Account("424242", "RhfghOCK", "0154654654", 
       "ghfgh", "hgfh", "2635454564"); 

     adapter.add(account); 
     adapter.notifyDataSetChanged(); 

    } 

} 

}

라인 (48) corre 시간상으로 :

View o = listView.getChildAt(position).findViewById(R.id.blocCheck); 

내 사용자 정의 adater :

public class AccountNameListAdapter extends ArrayAdapter<Account> { 


    private Context context; 
    private int layoutResourceId; 
    private ArrayList<Account> data; 
    private TableLayout table; 
    private TextView tableName; 
    private TextView tableId; 



    public AccountNameListAdapter(Context context, int layoutResourceId, ArrayList<Account> data) { 
     super(context, layoutResourceId, data); 
     this.layoutResourceId = layoutResourceId; 
     this.context = context; 
     this.data = data; 
     table = (TableLayout) ((Activity) context).findViewById(R.id.tableLayout); 
     tableName = (TextView) ((Activity) context).findViewById(R.id.NameText); 
     tableId = (TextView) ((Activity) context).findViewById(R.id.idText); 
    } 

    @Override 
    public View getView(final int position, View convertView, ViewGroup parent) {   

     AccountHolder holder = null; 

     if(convertView == null) 
     { 
      LayoutInflater inflater = ((Activity)context).getLayoutInflater(); 
      convertView = inflater.inflate(layoutResourceId, parent, false); 

      holder = new AccountHolder(); 

      convertView.setClickable(true); 
      convertView.setFocusable(true); 

      convertView.setOnClickListener(new OnClickListener() { 

       public void onClick(View v) { 
        new AlertDialog.Builder(context).setTitle("touched").show();     
        table.setVisibility(0); 
        tableName.setText("ok name"); 
        tableId.setText("ok "+ data.get(position).getAccountId());      
       } 

      }); 


      holder.txtName = (TextView)convertView.findViewById(R.id.nom); 
      holder.txtId = (TextView)convertView.findViewById(R.id.id); 

      convertView.setTag(holder); 


     } 
        else{ 
     holder = (AccountHolder)convertView.getTag(); 
     } 

     holder.txtName.setText(data.get(position).getName()); 
     holder.txtId.setText(data.get(position).getAccountId()); 


     ImageButton img = (ImageButton) convertView.findViewById (R.id.check); 
     img.setTag (position); 
     }); 


     return convertView; 
    } 

    static class AccountHolder 
    { 
     TextView txtName; 
     TextView txtId; 
    } 


} 

list_detail.xml :

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
android:orientation="horizontal" android:layout_width="fill_parent" 
android:layout_height="wrap_content"> 


<TableLayout android:id="@+id/blocCheck" 
    android:background="#EEF9F8" 
    android:layout_height="wrap_content" 
    android:layout_width="fill_parent" 
    android:layout_marginTop="5dp" 
    android:layout_marginBottom="5dp"> 


    <TableRow android:layout_width="fill_parent" 
     android:layout_height="wrap_content" 
     android:paddingLeft="4sp" 
     android:paddingBottom="4sp"> 
     <LinearLayout 
      android:orientation="horizontal" 
      android:layout_width="fill_parent" 
      android:layout_height="wrap_content" 
      android:paddingLeft="20sp" 
      android:layout_weight="1" 
      android:gravity="center" 
      > 

      <TextView android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:textSize="20sp" 
       android:text="Name : " 
       android:layout_gravity="left" 
       android:layout_marginRight="5sp" /> 
      <TextView android:id="@+id/nom" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:textSize="20sp" 
       android:layout_gravity="left" /> 
     </LinearLayout> 
    </TableRow> 


    <TableRow android:layout_width="fill_parent" 
     android:layout_height="wrap_content" 
     android:paddingLeft="4sp" 
     android:baselineAligned="true"> 
     <LinearLayout 
      android:orientation="horizontal" 
      android:layout_width="fill_parent" 
      android:layout_height="wrap_content" 
      android:paddingLeft="20sp" 
      android:layout_weight="1" 
      android:gravity="center"> 
      <TextView android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:textSize="20sp" 
       android:text="Id : " 
       android:layout_gravity="left" 
       android:layout_marginRight="5sp" /> 
      <TextView android:id="@+id/id" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:textSize="20sp" 
       android:layout_gravity="left" /> 
     </LinearLayout> 
     <ImageButton android:layout_height="wrap_content" 
      android:id="@+id/check" 
      android:layout_width="wrap_content" 
      android:background="@drawable/edit" 
      android:layout_gravity="right" 
      android:layout_marginRight="10sp" 
      android:onClick="MyHandler"/> 
    </TableRow> 
</TableLayout> 

Answer 1

ListView에 대한 getChildAt이 반환하는 방법, 유효한 View (null 휴식) positio n은 화면의 보이는 자식에 해당합니다. 해당 메서드에 제공되는 정수는 ListView.getLastVisiblePosition() - ListView.getFirstVisiblePosition()에 정의 된 간격 내에 있어야합니다.

시도는 position에서 뺄 getFirstVisiblePosition()의 값 : ID의 LinearLayout 사용자 지정 목록을 설정하고 클릭 이벤트 호출을 기반으로하는

View o = listView.getChildAt(position - listView.getFirstVisiblePosition()).findViewById(R.id.blocCheck); 

Answer 2

봅니다 ....이 ListAdapter의 호출입니다

이것은 ListAdapter 클래스입니다

lv.setAdapter(new Listadapter(getApplicationContext(), R.id.listView1, list)); 

....

public class Listadapter extends ArrayAdapter<BinForBlog> 
     { 
      ArrayList<BinForBlog> mList = new ArrayList<BinForBlog>(); 
      public Listadapter(Context context, int textViewResourceId,ArrayList<BinForBlog> list) 
      { 
       super(context, textViewResourceId, list); 
       this.mList = list; 


      } 
      @Override 
      public View getView(int position, View convertView, ViewGroup parent) 
      { 

       View v = convertView; 

       if(v==null) 
       { 
        LayoutInflater li = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
        v=li.inflate(R.layout.custom_blog, null); 

       } 

       TextView Title = (TextView) v.findViewById(R.id.blog_title); 
       TextView Date = (TextView) v.findViewById(R.id.blog_date); 
       TextView Desc = (TextView) v.findViewById(R.id.blog_desc); 
       LinearLayout content = (LinearLayout) v.findViewById(R.id.lnrblog); 


       final BinForBlog listitem = mList.get(position); 

       // For Underline 
       SpannableString text = new SpannableString(listitem.getTitle()); 
       text.setSpan(new UnderlineSpan(), 0, text.length(), 0); 

       Title.setText(text); 
       Date.setText(listitem.getDate()); 
       Desc.setText(listitem.getDesc()); 


       content.setOnClickListener(new OnClickListener() 
       { 

        public void onClick(View arg0) 
        { 

         Intent i = new Intent(getApplicationContext(),show_blog_web.class); 
         i.putExtra("link1", listitem.getLink()); 
         startActivity(i); 


        } 
       }); 


       return v; 
      } 


     }