android에서 sqlite를 사용하여 삽입 할 때 데이터를 구별하는 방법은 무엇입니까?

Question

버튼의 클릭 이벤트에서 데이터베이스를 생성합니다. 다음에 Activity에 대한 선택 쿼리가 실행되면 두 개의 동일한 레코드가 ListView에 표시됩니다. 나는 무슨 일이 일어날 지 이해할 수 없다 ?? 제게 제안 해주세요.

ListActivity.java

package com.example.timerdemo2; 

     import java.util.ArrayList; 

     import android.R.menu; 
     import android.os.Bundle; 
     import android.provider.ContactsContract.CommonDataKinds.Phone; 
     import android.annotation.SuppressLint; 
     import android.app.Activity; 
     import android.content.Intent; 
     import android.database.Cursor; 
     import android.database.sqlite.SQLiteDatabase; 
     import android.view.ContextMenu; 
     import android.view.Menu; 
     import android.view.MenuInflater; 
     import android.view.MenuItem; 
     import android.view.View; 
     import android.view.ContextMenu.ContextMenuInfo; 
     import android.view.View.OnClickListener; 
     import android.widget.AdapterView; 
     import android.widget.ArrayAdapter; 
     import android.widget.Button; 
     import android.widget.ListView; 
     import android.widget.Toast; 
     import android.widget.AdapterView.AdapterContextMenuInfo; 

     public class ListActivity extends Activity { 
      ListView lv; 
      ArrayList<String> items = new ArrayList<String>(); 
      ArrayList<String> items_id = new ArrayList<String>(); 
      dbhelper dh; 
      SQLiteDatabase db; 
      int index_id; 
      Button btn; 

      @Override 
      public void onCreate(Bundle savedInstanceState) { 
       super.onCreate(savedInstanceState); 
       setContentView(R.layout.activity_list); 
       Button btn; 
       btn = (Button)findViewById(R.id.newProjectlist); 
       btn.setOnClickListener(new OnClickListener() { 

        public void onClick(View v) { 
         // TODO Auto-generated method stub 


          Intent intent= new Intent(ListActivity.this,NewProject.class); 
         startActivity(intent); 
        } 
       }); 
       lv = (ListView)findViewById(R.id.projectListView); 
       setUpList(); 
       dh = new dbhelper(this); 
       Cursor c = getAllData(); 
       showAllData(c); 
       registerForContextMenu(lv);  
      } 

      @Override 
      public void onCreateContextMenu(ContextMenu menu, View v, 
        ContextMenuInfo menuInfo) { 
       // TODO Auto-generated method stub 
       super.onCreateContextMenu(menu, v, menuInfo); 

       if(v.getId() == R.id.projectList){ 
        menu.setHeaderIcon(R.drawable.ic_launcher); 
        menu.setHeaderTitle("Record List"); 
        menu.add(0,1,menu.NONE,"Delete Record"); 
        menu.add(0,2,menu.NONE,"Show Record"); 
       } 
      } 

      @Override 
     public boolean onContextItemSelected(MenuItem item) { 
      // TODO Auto-generated method stub 
       int itemId = item.getItemId(); 
       if(itemId == 1) 
       { 
        AdapterView.AdapterContextMenuInfo menuinfo = (AdapterContextMenuInfo) item.getMenuInfo(); 
        int poistion = menuinfo.position; 
        String id_string = items_id.get(poistion); 
        long id = Long.valueOf(id_string); 

        //menuinfo = (AdapterContextMenuInfo) item.getMenuInfo(); 
        //index_id = menuinfo.position; 
        deleteUserData(index_id); 
        items_id.remove(poistion); 
       } 
       if(itemId == 2){ 
        AdapterView.AdapterContextMenuInfo menuinfo; 
        menuinfo = (AdapterContextMenuInfo) item.getMenuInfo(); 
        index_id = menuinfo.position; 
        editUserData(index_id); 
       } 
      return super.onContextItemSelected(item); 
     } 

      private void editUserData(int indexid) { 
       // TODO Auto-generated method stub 
       String user_id = items_id.get(indexid); 
       Intent intEdit = new Intent(ListActivity.this, MainActivity.class); 
       intEdit.putExtra("EditID", user_id); 
       startActivityForResult(intEdit, 1); 
      } 

      private void deleteUserData(int indexid) { 
       // TODO Auto-generated method stub 
     //  String user_id = items_id.get(indexid); 
       //Toast.makeText(getApplicationContext(), "id " + user_id, 1).show(); 
       db = dh.getWritableDatabase(); 
       db.delete("timer","_ID" + "=" + indexid, null); 
       finish(); 
     //  Toast.makeText(getApplicationContext(), "Record deleted successfully", 1).show(); 
      } 

      private void showAllData(Cursor c) { 
       // TODO Auto-generated method stub 
       while(c.moveToNext()) 
       { 
        int id = c.getInt(0); 
        String name = c.getString(1); 
        String timerpoint1 = c.getString(2); 
        String timerpoint2 = c.getString(3); 
        String timerpoint3 = c.getString(4); 
        String servicetime1 = c.getString(5); 
        String servicetime2 = c.getString(6); 
        items.add("" + name); 
        items_id.add(""+id); 
       } 
       setUpList(); 
      } 

      private Cursor getAllData() { 
       // TODO Auto-generated method stub 
       db = dh.getReadableDatabase(); 
       //String sortorder = dh.Name + "DESC"; 
      // String query ="SELECT DISTINCT name FROM timer"; 
      // Cursor c = db.rawQuery(query, null); 
      // if (c != null) { 
      //   c.moveToFirst(); 
      //  } 
     //  String[] cols = new String[] {dh.Name, "name"}; 
       Cursor c = db.query(true, "timer",null,null,null,null,null,null, null); 
       //Cursor cur = db.query(Distinct,"timer", null, null, null, null, null, null, null); 
       startManagingCursor(c); 
       return c; 
       } 
      private void setUpList() { 
       // TODO Auto-generated method stub 
       lv.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1,items)); 
      } 

      } 

ListView 두 개의 항목에서 쇼 기록이 이루어집니다 : 나는 다음에 대한 코드가 있습니다. 나는 별개의 기록을 만들고 싶다. 그래서 도움을 제공하십시오.

로그 캣

01-01 18:42:49.941: W/dalvikvm(12683): threadid=1: thread exiting with uncaught exception (group=0x40015560) 
01-01 18:42:49.951: E/AndroidRuntime(12683): FATAL EXCEPTION: main 
01-01 18:42:49.951: E/AndroidRuntime(12683): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.timerdemo2/com.example.timerdemo2.ListActivity}: java.lang.IllegalStateException: get field slot from row 0 col 2 failed 
01-01 18:42:49.951: E/AndroidRuntime(12683): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647) 
01-01 18:42:49.951: E/AndroidRuntime(12683): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663) 
01-01 18:42:49.951: E/AndroidRuntime(12683): at android.app.ActivityThread.access$1500(ActivityThread.java:117) 
01-01 18:42:49.951: E/AndroidRuntime(12683): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931) 
01-01 18:42:49.951: E/AndroidRuntime(12683): at android.os.Handler.dispatchMessage(Handler.java:99) 
01-01 18:42:49.951: E/AndroidRuntime(12683): at android.os.Looper.loop(Looper.java:130) 
01-01 18:42:49.951: E/AndroidRuntime(12683): at android.app.ActivityThread.main(ActivityThread.java:3683) 
01-01 18:42:49.951: E/AndroidRuntime(12683): at java.lang.reflect.Method.invokeNative(Native Method) 
01-01 18:42:49.951: E/AndroidRuntime(12683): at java.lang.reflect.Method.invoke(Method.java:507) 
01-01 18:42:49.951: E/AndroidRuntime(12683): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) 
01-01 18:42:49.951: E/AndroidRuntime(12683): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 
01-01 18:42:49.951: E/AndroidRuntime(12683): at dalvik.system.NativeStart.main(Native Method) 
01-01 18:42:49.951: E/AndroidRuntime(12683): Caused by: java.lang.IllegalStateException: get field slot from row 0 col 2 failed 
01-01 18:42:49.951: E/AndroidRuntime(12683): at android.database.CursorWindow.getString_native(Native Method) 
01-01 18:42:49.951: E/AndroidRuntime(12683): at android.database.CursorWindow.getString(CursorWindow.java:329) 
01-01 18:42:49.951: E/AndroidRuntime(12683): at android.database.AbstractWindowedCursor.getString(AbstractWindowedCursor.java:49) 
01-01 18:42:49.951: E/AndroidRuntime(12683): at com.example.timerdemo2.ListActivity.showAllData(ListActivity.java:123) 
01-01 18:42:49.951: E/AndroidRuntime(12683): at com.example.timerdemo2.ListActivity.onCreate(ListActivity.java:56) 
01-01 18:42:49.951: E/AndroidRuntime(12683): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 
01-01 18:42:49.951: E/AndroidRuntime(12683): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611) 
01-01 18:42:49.951: E/AndroidRuntime(12683): ... 11 more 
01-01 18:42:52.430: D/dalvikvm(12758): GC_EXTERNAL_ALLOC freed 53K, 50% free 2739K/5379K, external 716K/1038K, paused 112ms 

Answer 1

넣어 당신의 dbhelper 클래스에서이 방법.

public Cursor get_dist(){ 
SQLiteDatabase db = this.getReadableDatabase(); 
String Distinct_Query="select distinct name from timer;"; 
Cursor cursor=db.rawQuery(Distinct_Query,null); 
db.close(); 
return cursor; 
} 

이 별개의 기록

로 커서를 반환하고

dbhelper dh=new dbhelper(this); 
    Cursor c=dh.get_dist(); 

이제 커서 C에서 레코드를 검색 활동이 코드를 추가합니다.