自定义列表适配器类

本文介绍了自定义列表适配器类的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 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（ 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www.brainysolutions/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 www.brainysolutions/Course/Section/483/learn-android-development-for-beginners-listview[^].