Как показать SQLite данные в ListView с помощью фрагментировать

Question

Модель класса

public class ClientModel { 

public int id; 
public String case_no; 
public String case_title; 
public String client_name; 
public String client_email; 
public String client_address; 
public String client_opt_lawyer; 
public String client_court; 
public String client_fee; 
public String client_date; 

public ClientModel(int id, String case_no, String case_title,String client_email, 
        String client_name,String client_address,String client_opt_lawyer,String client_court, 
        String client_date) { 
    // TODO Auto-generated constructor stub 
    this.id = id; 
    this.case_no = case_no; 
    this.case_title = case_title; 
    this.client_email = client_email; 
    this.case_title = case_title; 
    this.client_name = client_name; 
    this.client_address = client_address; 
    this.client_opt_lawyer = client_opt_lawyer; 
    this.client_court = client_court; 
    this.client_date = client_date; 
} 


public ClientModel(){ 

} 

}

Это мой dababase вспомогательный класс:

public class DatabaseHelper extends SQLiteOpenHelper { 

public static String DATABASE_NAME = "vakil"; 

// Current version of database 
private static final int DATABASE_VERSION = 1; 

// Name of table 
private static final String TABLE_CASES = "cases"; 

// All Keys used in table 
private static final String KEY_ID = "id"; 
private static final String KEY_CASENO = "case_no"; 
private static final String KEY_TITLE = "case_title"; 
private static final String KEY_NAME = "client_name"; 
private static final String KEY_EMAIl = "client_email"; 
private static final String KEY_ADDRESS = "client_address"; 
private static final String KEY_OPTLAWYER = "client_opt_lawyer"; 
private static final String KEY_COURT = "client_court"; 
private static final String KEY_FEE = "client_fee"; 
private static final String KEY_DATE = "client_date"; 


public static String TAG = "tag"; 



private static final String CREATE_TABLE_CASES = "CREATE TABLE " 
     + TABLE_CASES + "(" 
     + KEY_ID + " INTEGER PRIMARY KEY AUTOINCREMENT," 
     + KEY_NAME + " TEXT," 
     + KEY_CASENO + " TEXT," 
     + KEY_TITLE + " TEXT," 
     + KEY_EMAIl + " TEXT," 
     + KEY_ADDRESS + " TEXT," 
     + KEY_OPTLAWYER + " TEXT," 
     + KEY_FEE + " TEXT," 
     + KEY_DATE + " TEXT," 
     + KEY_COURT + " TEXT);"; 

public DatabaseHelper(Context context) { 
    super(context, DATABASE_NAME, null, DATABASE_VERSION); 
} 



@Override 
public void onCreate(SQLiteDatabase db) { 

    db.execSQL(CREATE_TABLE_CASES); // create students table 

} 


@Override 
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { 
    db.execSQL("DROP TABLE IF EXISTS " + TABLE_CASES); // drop table if exists 

    onCreate(db); 
} 



public long addClientDetail(ClientModel client) { 

    SQLiteDatabase db = this.getWritableDatabase(); 

    // Creating content values 
    ContentValues values = new ContentValues(); 
    values.put(KEY_CASENO, client.case_no); 
    values.put(KEY_TITLE, client.case_title); 
    values.put(KEY_NAME, client.client_name); 
    values.put(KEY_EMAIl, client.client_email); 
    values.put(KEY_ADDRESS, client.client_address); 
    values.put(KEY_OPTLAWYER, client.client_opt_lawyer); 
    values.put(KEY_COURT, client.client_court); 
    values.put(KEY_FEE, client.client_fee); 
    values.put(KEY_DATE, client.client_date); 


    long insert = db.insert(TABLE_CASES, null, values); 

    return insert; 
} 

public List<ClientModel> getAllClientList() { 
    List<ClientModel> clientArrayList = new ArrayList<ClientModel>(); 

    clientArrayList.clear(); 
    String selectQuery = "SELECT * FROM " + TABLE_CASES ; 
    Log.d(TAG, selectQuery); 

    SQLiteDatabase db = this.getReadableDatabase(); 
    Cursor c = db.rawQuery(selectQuery, null); 

    // looping through all rows and adding to list 
    if (c.moveToFirst()) { 
     do { 

      ClientModel client = new ClientModel(); 
      client.id = c.getInt(c.getColumnIndex(KEY_ID)); 
      client.case_no = c.getString(c.getColumnIndex(KEY_CASENO)); 
      client.case_title = c.getString(c.getColumnIndex(KEY_TITLE)); 
      client.client_name = c.getString(c.getColumnIndex(KEY_NAME)); 
      client.client_email = c.getString(c.getColumnIndex(KEY_EMAIl)); 
      client.client_address = c.getString(c.getColumnIndex(KEY_ADDRESS)); 
      client.client_opt_lawyer = c.getString(c.getColumnIndex(KEY_OPTLAWYER)); 
      client.client_court = c.getString(c.getColumnIndex(KEY_COURT)); 
      client.client_fee = c.getString(c.getColumnIndex(KEY_COURT)); 
      client.client_date = c.getString(c.getColumnIndex(KEY_DATE)); 
      // adding to Students list 
      clientArrayList.add(client); 
     } while (c.moveToNext()); 
    } 

    return clientArrayList; 
} 
} 

Это мой фрагмент класс:

public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { 

    View view= inflater.inflate(layout.caselist, container, false); 
    lv = (ListView) view.findViewById(id.list_client); 
    lv.setAdapter(adapter); 
    return view; 
} 

Это моя ада PTER класс

public ClientListAdapter(Context context, List<ClientModel> clientlist) { 
    this.context = context; 
    this.clientlist = clientlist; 
    this.db = new DatabaseHelper(context.getApplicationContext()); 
    clientlist = db.getAllClientList(); 
} 

@Override 
public View getView(int position, View convertView, ViewGroup parent) { 
    View view=convertView; 
    if(convertView==null){ 

     LayoutInflater inflater = (LayoutInflater) context 
       .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
     view = inflater.inflate(R.layout.list_item,parent,false); 

    } 



    txt_client_case_no = (TextView)view.findViewById(R.id.txt_client_case_no); 
    txt_client_name1 = (TextView)view.findViewById(R.id.txt_client_name1); 
    txt_client_title = (TextView)view.findViewById(R.id.txt_client_title); 
    txt_client_email = (TextView)view.findViewById(R.id.txt_client_email); 
    txt_client_address = (TextView)view.findViewById(R.id.txt_client_address); 

    txt_client_case_no.setText((CharSequence) clientlist.get(position).case_no); 
    txt_client_name1.setText(clientlist.get(position).client_name); 
    txt_client_email.setText(clientlist.get(position).client_email); 

    return view; 
} 

Когда я запускаю выше код им не в состоянии получить любой вид даже не показывая какую-либо ошибку в LogError. Я не знаю, где я делаю ошибку.

Answer 1

Инициализировать адаптер в своем классе фрагмент

ClientListAdapter adapter; 
ArrayList<ClientModel> search = new ArrayList<ClientModel>(); 

adapter = new ClientListAdapter(getActivity(), search, lv); 
search = db.getAllClientList(); // call your method here 
lv.setAdapter(adapter); 

Попробуйте обновить класс адаптера к этому

private static ArrayList<ClientModel> search; 
private LayoutInflater mInflater; 
ListView listview; 

public ClientListAdapter(Context context, ArrayList<ClientModel> searchList, ListView listview) { 
     search=searchList; 
     this.listview=listview; 
     mInflater = LayoutInflater.from(context); 
    } 

    @Override 
    public View getView(int position, View convertView, ViewGroup parent) { 
     ViewHolder holder =null; 
     if(convertView==null){ 
     convertView = mInflater.inflate(R.layout.list_item,parent,null); 
     holder = new Holder(); 
     txt_client_case_no = (TextView)convertView.findViewById(R.id.txt_client_case_no); 
     txt_client_name1 = (TextView)convertView.findViewById(R.id.txt_client_name1); 
     txt_client_title = (TextView)convertView.findViewById(R.id.txt_client_title); 
     txt_client_email = (TextView)convertView.findViewById(R.id.txt_client_email); 
     txt_client_address = (TextView)convertView.findViewById(R.id.txt_client_address); 
    convertView.setTag(holder); 
    } 
    else { 
      holder = (ViewHolder) convertView.getTag(); 
      } 
     holder.txt_client_case_no.setText((CharSequence) clientlist.get(position).case_no); 
     holder.txt_client_name1.setText(clientlist.get(position).client_name); 
     holder.txt_client_email.setText(clientlist.get(position).client_email); 
     } 
     return convertView; 
    } 

    static class ViewHolder { 
      TextView txt_client_case_no; 
      // also other textView   
     } 
    } 

Answer 2

Я думаю, вы должны переконструировать исходный код.
Переместить clientlist = db.getAllClientList(); в конструктор адаптера.

Answer 3

Возможно, вы не нашли ошибку?

String selectQuery = "SELECT * FROM " + CREATE_TABLE_CASES; 

Неверное изображение. Вы не можете выбрать из инструкции CREATE. Вы выбираете из таблицы.

Аналогично для DROP заявления

db.execSQL("DROP TABLE IF EXISTS " + CREATE_TABLE_CASES); 

Кроме того, предпочтительно перемещать clientlist = db.getAllClientList(); в конструктор, но это только из соображений производительности.