배열 어댑터가 작동하지 않습니다.

Question

배열 어댑터를 사용하여 목록보기를 채우려고합니다. POJO 클래스에서 배열 어댑터에 이르는 객체의 배열 목록을 만듭니다. 객체의 arraylist를 전달하여 arrayadapter 클래스를 인스턴스화하려고하면 SETADAPTER 행을 실행하는 동안 null 포인터 예외가 발생합니다.

날이

private void initialize() {  
    listView=(ListView)findViewById(R.id.lvOpenTicketList); 

    POJO_Ticket pojo_Ticket; 
    ArrayList<POJO_Ticket> ticketArray = new ArrayList<POJO_Ticket>(); 

    for(int i=0;i<openTicketList.size();i++){ 
     pojo_Ticket = new POJO_Ticket(openTicketList.get(i)); 
     ticketArray.add(pojo_Ticket);  
     Log.i("OpenTicket","i = " + Integer.toString(i)); 
    } 
     Log.i("OpenTicket","ticketArray " + ticketArray.size()); 


     adapterTicketList=new AdapterTicketList(this, ticketArray); 
     listView.setAdapter(adapterTicketList); 
     listView.setOnItemClickListener(this);  
} 

---

public class AdapterTicketList extends ArrayAdapter<POJO_Ticket> { 
Context context; 
ArrayList<POJO_Ticket> ticketArray; 
LayoutInflater vi; 

public AdapterTicketList(Context context , ArrayList<POJO_Ticket> ticketArray) {  
    super(context, 0, ticketArray);  
    this.ticketArray = new ArrayList<POJO_Ticket>();  
    this.ticketArray.addAll(ticketArray); 
    this.context =context; 
    Log.i("AdapterTicketList"," ticket id : " + ticketArray.get(0).getTicketObject().getId()); 
    vi = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
    } 

private class ViewHolder { 
    TextView tvTicketID; 
    TextView tvCreationHour; 
    TextView tvTableNumber; 
    TextView tvAmount;  
    } 

public View getView(final int position, View convertView, ViewGroup parent) {  
    ViewHolder holder;  
    if (convertView == null) { 
     holder = new ViewHolder();     
     convertView = vi.inflate(R.layout.rowticket, null); 
     holder.tvTicketID = (TextView) convertView.findViewById(R.id.tvTicketID); 
     holder.tvCreationHour = (TextView) convertView.findViewById(R.id.tvCreationHour); 
     holder.tvTableNumber = (TextView) convertView.findViewById(R.id.tvTableNumber); 
     holder.tvAmount = (TextView) convertView.findViewById(R.id.tvQuantity); 
     convertView.setTag(holder); 
    } else { 
     holder = (ViewHolder) convertView.getTag(); 
    }  
    Log.i("AdapterTicketList"," ticket id : " + ticketArray.get(position).getTicketObject().getId()); 
    holder.tvTicketID.setText(ticketArray.get(position).getTicketObject().getId()) ; 
    holder.tvCreationHour.setText(ticketArray.get(position).getTicketObject().getCreationHour()) ; 
    holder.tvTableNumber.setText(ticketArray.get(position).getTicketObject().getTableNumber()) ; 
    holder.tvAmount.setText(Double.toString(ticketArray.get(position).getTicketObject().getTotalAmount())) ; 
    return convertView; 
    } 

}

01-08 22:11:13.707: W/dalvikvm(7284): threadid=1: thread exiting with uncaught exception (group=0x2b542210) 
01-08 22:11:13.717: E/AndroidRuntime(7284): FATAL EXCEPTION: main 
01-08 22:11:13.717: E/AndroidRuntime(7284): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.restaurent/com.example.restaurent.OpenTicketList}: java.lang.NullPointerException 
01-08 22:11:13.717: E/AndroidRuntime(7284): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1967) 
01-08 22:11:13.717: E/AndroidRuntime(7284): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1992) 
01-08 22:11:13.717: E/AndroidRuntime(7284): at android.app.ActivityThread.access$600(ActivityThread.java:127) 
01-08 22:11:13.717: E/AndroidRuntime(7284): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1158) 
01-08 22:11:13.717: E/AndroidRuntime(7284): at android.os.Handler.dispatchMessage(Handler.java:99) 
01-08 22:11:13.717: E/AndroidRuntime(7284): at android.os.Looper.loop(Looper.java:137) 
01-08 22:11:13.717: E/AndroidRuntime(7284): at android.app.ActivityThread.main(ActivityThread.java:4441) 
01-08 22:11:13.717: E/AndroidRuntime(7284): at java.lang.reflect.Method.invokeNative(Native Method) 
01-08 22:11:13.717: E/AndroidRuntime(7284): at java.lang.reflect.Method.invoke(Method.java:511) 
01-08 22:11:13.717: E/AndroidRuntime(7284): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) 
01-08 22:11:13.717: E/AndroidRuntime(7284): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 
01-08 22:11:13.717: E/AndroidRuntime(7284): at dalvik.system.NativeStart.main(Native Method) 
01-08 22:11:13.717: E/AndroidRuntime(7284): Caused by: java.lang.NullPointerException 
01-08 22:11:13.717: E/AndroidRuntime(7284): at com.example.restaurent.OpenTicketList.initialize(OpenTicketList.java:67) 
01-08 22:11:13.717: E/AndroidRuntime(7284): at com.example.restaurent.OpenTicketList.onCreate(OpenTicketList.java:48) 
01-08 22:11:13.717: E/AndroidRuntime(7284): at android.app.Activity.performCreate(Activity.java:4465) 
01-08 22:11:13.717: E/AndroidRuntime(7284): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049) 
01-08 22:11:13.717: E/AndroidRuntime(7284): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1931) 
01-08 22:11:13.717: E/AndroidRuntime(7284): ... 11 more 

Answer 1

Caused by: java.lang.NullPointerException 
    at com.example.restaurent.OpenTicketList.initialize(OpenTicketList.java:67) 

NullPointerException이 당신이 널에서하는 방법 또는 멤버를 참조하려고했음을 의미 해결하기 위해 인도하십시오 이 경우에는 null.setAdapter()입니다.

은 그래서