自定义列表适配器类 [英] Custom List Adapter Class

问题描述

我正在尝试从Android中的SQLite数据库中获取所有记录并在A String Array中填充它并在自定义arrayadapter类中设置Listview和String数组但是我无法仅显示所有记录的最后一条记录显示在ListView上。但我检查取物是完美的。



获取数据的代码：

  public  ArrayList< GetterSetter>搜索（字符串数据）{
 Log.d（  DATA，数据）; 
 ArrayList< GetterSetter> arr_gs = new ArrayList< GetterSetter>（）; 
 GetterSetter gs = new GetterSetter（）; 
 SQLiteDatabase db = this.getReadableDatabase（）; 
 字符串 qry =  从*中选择*  + tbl_profile_details +  其中firstname如'％ + data +  ％'; 
 Log.d（  QUERY，qry）; 
 Cursor cursor = db.rawQuery（qry，null）; 
  if （cursor.moveToFirst（））
 {
  do  {
 Log.d（  USERNAME，cursor.getString（ 1 ）+   // + cursor.getString（< span class =code-digit> 6 ）+   + cursor.getString （ 2 ）+   +游标.getString（ 3 ）+   + cursor.getString（ 5 ）+   //  + cursor.getString（ 7 ））; 
 gs.set_Username（cursor.getString（ 1 ））; 
 gs.set_Name（cursor.getString（ 6 ）+   + cursor.getString（ 2 ）+   + cursor.getString（ 3 ）+   + cursor.getString（ 5 ））; 
 gs.set_Mobile（cursor.getString（ 7 ））; 
 arr_gs.add（gs）; 
}  while （cursor.moveToNext（））; 
} 
 
  return  arr_gs; 
} 

在ArrayList中存储数据的代码设置为ListView：

 ArrayList< GetterSetter> gettersetter = new ArrayList<>（）; 
 gettersetter.clear（）; 
 DatabaseHandler db =  new  DatabaseHandler（getApplicationContext（））; 
 gettersetter = db.Search（search_term）; 
 
 Log.d（  Size，  + gettersetter.size（））; 
  / *   final ArrayList< String> username = new ArrayList<>（）; 
 ArrayList< String> name = new ArrayList<>（）; 
 ArrayList< String> mobile = new ArrayList<>（）; * /  
 
  final   String  [] username = new  String  [gettersetter.size（）]; 
  final   String  [] name = new  String  [gettersetter.size（）]; 
  final   String  [] mobile = new  String  [gettersetter.size（）]; 
 
 
  for （ int  i =  0 ; i< gettersetter.size（）; i ++）{
 GetterSetter gs1; 
 gs1 = gettersetter.get（i）; 
 username [i] = gs1.get_Username（）; 
 name [i] = gs1.get_Name（）; 
 mobile [i] = gs1.get_Mobile（）; 
} 
 
  / *   Object [] objuser = username.toArray（）; 
 String [] un = new String [objuser.length]; 
 
 Object [] objname = name.toArray（）; 
 String [] n = new String [objname.length]; 
 
 Object [] objmobile = mobile.toArray（）; 
 String [] m = new String [objmobile.length]; 
 for（int i = 0; i< un.length; i ++）{
 un [i] =（String）objuser [i]; 
 n [i] =（String）objname [i]; 
 m [i] =（String）objmobile [i]; 
} * /  
 
 lv =（ListView）findViewById（R.id.listview1）; 
 
 customSearchList =  new  CustomSearchList（ this ，name，mobile）; 
 lv.setAdapter（customSearchList）; 
 

将数据设置为ListView的自定义类代码：

  public  CustomSearchList（活动上下文，字符串 [] name， String  [] mobile）{
  super （context，R.layout.list_search，name）; 
 此 .context = context; 
 此 .name = name; 
 此 .mobile = mobile; 
} 
 
  @覆盖 
  public 查看getView （ int  position，View view，ViewGroup parent）{
 LayoutInflater inflater = context.getLayoutInflater（）; 
查看rowView = inflater.inflate（R.layout.list_search，null，true）; 
 TextView txtName =（TextView）rowView.findViewById（R.id.txtName）; 
 TextView txtMobile =（TextView）rowView.findViewById（R.id.txtMobile）; 
 txtName.setText（name [position]）; 
 txtMobile.setText（mobile [position]）; 
  return  rowView; 
} 

解决方案

参见http://www.brainysolutions.org/Course/Section/483/learn-android-development-for-beginners-listview [ ^ ]。

I am trying to fetch all the records from SQLite Database in Android and Fill it in A String Array and set the Listview With the String array in a custom arrayadapter class but I am not able to show all the records only the last record is displayed on the ListView. But i checked fetching is perfect.

Code For Fetching Data:

public ArrayList<GetterSetter> Search(String data){
        Log.d("DATA",data);
        ArrayList<GetterSetter> arr_gs=new ArrayList<GetterSetter>();
        GetterSetter gs=new GetterSetter();
        SQLiteDatabase db=this.getReadableDatabase();
        String qry="Select * from "+tbl_profile_details+" where firstname like '%"+data+"%'";
        Log.d("QUERY",qry);
        Cursor cursor=db.rawQuery(qry, null);
        if(cursor.moveToFirst())
        {
            do{
                Log.d("USERNAME",cursor.getString(1)+"//"+cursor.getString(6)+" "+cursor.getString(2)+" "+cursor.getString(3)+" "+cursor.getString(5)+"//"+cursor.getString(7));
                gs.set_Username(cursor.getString(1));
                gs.set_Name(cursor.getString(6)+" "+cursor.getString(2)+" "+cursor.getString(3)+" "+cursor.getString(5));
                gs.set_Mobile(cursor.getString(7));
                arr_gs.add(gs);
            }while(cursor.moveToNext());
        }

        return arr_gs;
    }

Code For Storing Data in ArrayList an Set to ListView:

ArrayList<GetterSetter> gettersetter=new ArrayList<>();
       gettersetter.clear();
       DatabaseHandler db = new DatabaseHandler(getApplicationContext());
       gettersetter=db.Search(search_term);

       Log.d("Size", "" + gettersetter.size());
      /*final ArrayList<String> username=new ArrayList<>();
      ArrayList<String>  name=new  ArrayList<>();
      ArrayList<String> mobile=new  ArrayList<>();*/

       final String[] username=new String[gettersetter.size()];
       final String[] name=new String[gettersetter.size()];
       final String[] mobile=new String[gettersetter.size()];


       for (int i = 0; i < gettersetter.size(); i++) {
           GetterSetter gs1;
           gs1 = gettersetter.get(i);
           username[i]=gs1.get_Username();
           name[i]=gs1.get_Name();
           mobile[i]=gs1.get_Mobile();
       }

       /*Object[] objuser = username.toArray();
       String[] un=new String[objuser.length];

       Object[] objname = name.toArray();
       String[] n=new String[objname.length];

       Object[] objmobile = mobile.toArray();
       String[] m=new String[objmobile.length];
       for(int i=0;i<un.length;i++){
           un[i]=(String)objuser[i];
           n[i]=(String)objname[i];
           m[i]=(String)objmobile[i];
       }*/

       lv = (ListView) findViewById(R.id.listview1);

       customSearchList = new CustomSearchList(this, name, mobile);
       lv.setAdapter(customSearchList);

Custom Class Code For Setting Data to ListView:

public CustomSearchList(Activity context,String[] name,String[] mobile){
        super(context, R.layout.list_search,name);
        this.context=context;
        this.name=name;
        this.mobile=mobile;
    }

    @Override
    public View getView(int position,View view,ViewGroup parent){
        LayoutInflater inflater=context.getLayoutInflater();
        View rowView= inflater.inflate(R.layout.list_search, null, true);
        TextView txtName = (TextView) rowView.findViewById(R.id.txtName);
        TextView txtMobile = (TextView) rowView.findViewById(R.id.txtMobile);
        txtName.setText(name[position]);
        txtMobile.setText(mobile[position]);
        return rowView;
    }

解决方案

See http://www.brainysolutions.org/Course/Section/483/learn-android-development-for-beginners-listview[^].

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