在搜索选项中得到错误答案

时间：2016-05-03 06:22:32

标签： android listview

我的主ListView中有一个Activity，ActionBar中有一个搜索选项。但是当我尝试搜索某些内容时，它会给我一个错误的列表。

这是我的mainActivity类：

    public class MainActivity extends AppCompatActivity{
FloatingActionButton fab;
DBHelper myDb;
ArrayList<AccountDetails> rList;
ListView listView;
RemainderAdapter adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_three);

    fab = (FloatingActionButton) findViewById(R.id.fab);
    listView = (ListView) findViewById(R.id.listView);
    myDb = new DBHelper(this);
    showViews();
    onClickViews();
    fab.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            startActivity(new Intent(MainActivity.this, ActivityFour.class));
        }
    });
}

private void onClickViews() {
    listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int po, long id) {
            Intent i = new Intent(MainActivity.this, ActivityFive.class);
            i.putExtra("position", po);
            startActivity(i);

        }
    });
}

private void showViews() {
    rList = new ArrayList<AccountDetails>();
    rList = myDb.getAllRows();
    if (rList.size() != 0) {
        adapter = new RemainderAdapter(this, rList);
        listView.setAdapter(adapter);
        listView.setTextFilterEnabled(true);
    } else {
        Toast.makeText(this,"There is no item in the list",Toast.LENGTH_SHORT).show();
    }

}
@Override
public boolean onCreateOptionsMenu(Menu menu){
    getMenuInflater().inflate(R.menu.menu_item,menu);
    SearchManager searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE);
    SearchView searchView = (SearchView) menu.findItem(R.id.search).getActionView();
    searchView.setSearchableInfo(searchManager.getSearchableInfo(getComponentName()));
    searchView.setIconifiedByDefault(false);

SearchView.OnQueryTextListener textChangeListener = new SearchView.OnQueryTextListener()
{
    @Override
    public boolean onQueryTextChange(String newText)
    {
        Toast.makeText(getApplicationContext(), "TextChange..." + newText, Toast.LENGTH_SHORT).show();

            adapter.getFilter().filter(newText);
        return true;
    }
    @Override
    public boolean onQueryTextSubmit(String query)
    {
        Toast.makeText(getApplicationContext(), "SUBMIT..." + query, Toast.LENGTH_SHORT).show();
        invalidateOptionsMenu();
        adapter.getFilter().filter(query);
        return true;
    }
};
searchView.setOnQueryTextListener(textChangeListener);
    return super.onCreateOptionsMenu(menu);

}}

//这是我的DBHelper类

    public class DBHelper extends SQLiteOpenHelper{
private static final String DB_NAME = "my_db";
private static final String TABLE_NAME = "reminders_web";
private static final int DATABASE_VERSION = 1;

public static final String KEY_ROWID = "_id";
public static final String ACC_NAME = "a_name";
public static final String USER_NAME = "u_name";
public static final String PWD = "password";
public static final String WEB = "w_site";
public static final String DESC = "desc";

private SQLiteDatabase db;
public static final String CREATE_TABLE="CREATE TABLE " + TABLE_NAME + "("
        + KEY_ROWID + " INTEGER PRIMARY KEY  AUTOINCREMENT," + ACC_NAME + " TEXT,"+USER_NAME + " TEXT,"
        + PWD + " TEXT," + WEB + " TEXT," + DESC + " TEXT "+ ")";
public DBHelper(Context context) {
    super(context, DB_NAME, null, DATABASE_VERSION );
}
@Override
public void onCreate(SQLiteDatabase db) {
    db.execSQL(CREATE_TABLE);
}

@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
    db.execSQL("DROP TABLE IF EXISTS"+TABLE_NAME);
    onCreate(db);
}
public boolean insertData(String a_name,String u_name,String password,String web,String desc) {

    SQLiteDatabase db = this.getWritableDatabase();
    ContentValues contentValues = new ContentValues();
    contentValues.put(ACC_NAME,a_name);
    contentValues.put(USER_NAME,u_name);
    contentValues.put(PWD, password);
    contentValues.put(WEB, web);
    contentValues.put(DESC, desc);
    long result=db.insert(TABLE_NAME,null,contentValues);
    db.close();
    if(result==-1)
        return false;
    else
        return true;

}
public ArrayList<AccountDetails> getAllRows(){
    ArrayList<AccountDetails> rList = new ArrayList<AccountDetails>();

    SQLiteDatabase db = this.getReadableDatabase();
    String[] col = new String[]{KEY_ROWID,ACC_NAME,USER_NAME,PWD,WEB,DESC};
    Cursor cursor = db.query(TABLE_NAME, col, null, null, null, null, ACC_NAME);

    // looping through all rows and adding to list
    if (cursor.moveToFirst()) {
        do {
            AccountDetails details = new AccountDetails();

            details.setaName(cursor.getString(cursor.getColumnIndex(ACC_NAME)));
            details.setuName(cursor.getString(cursor.getColumnIndex(USER_NAME)));
            details.setPwd(cursor.getString(cursor.getColumnIndex(PWD)));
            details.setwSite(cursor.getString(cursor.getColumnIndex(WEB)));
            details.setDesc(cursor.getString(cursor.getColumnIndex(DESC)));

            rList.add(details);
        } while (cursor.moveToNext());
    }
    db.close();
    return rList;
}

public boolean editRow(int id,String a_name, String u_name,String password){
    SQLiteDatabase db = this.getWritableDatabase();
    ContentValues contentValues = new ContentValues();
    contentValues.put(ACC_NAME,a_name);
    contentValues.put(USER_NAME,u_name);
    contentValues.put(PWD, password);
    long result=db.update(TABLE_NAME, contentValues, KEY_ROWID + "="+id, null);
    db.close();
    if(result==-1)
        return false;
    else
        return true;
}

public void deleteRow(AccountDetails rDetails) {
    SQLiteDatabase db = this.getWritableDatabase();
    db.delete(TABLE_NAME, ACC_NAME + " = ?", new String[]{String.valueOf(rDetails.getaName())});
    db.close();
}}

//这是我的自定义适配器类

    public class RemainderAdapter extends BaseAdapter implements Filterable{
private Context context;
int i=0;
private ArrayList<AccountDetails> rList;
private TextView aName,uName,circle;
ArrayList<AccountDetails> suggArray= new ArrayList<AccountDetails>();
private ArrayList<AccountDetails> originalData = null;
RemainderAdapter(Context context, ArrayList<AccountDetails> rList) {
    this.context = context;
    this.rList = rList;
    this.suggArray = rList;
    this.originalData=rList;
}

@Override
public int getCount() {
    return suggArray.size();
}

@Override
public Object getItem(int position) {
    return suggArray.get(position);
}

@Override
public long getItemId(int position) {
    return 0;
}

@Override
public View getView(final int position, View convertView, final ViewGroup parent) {
    if (convertView == null) {
        LayoutInflater inflater = (LayoutInflater) context.getSystemService(context.LAYOUT_INFLATER_SERVICE);
        convertView = inflater.inflate(R.layout.list_item, parent, false);
        aName = (TextView) convertView.findViewById(R.id.aName);
        uName = (TextView) convertView.findViewById(R.id.uName);
        circle=(TextView) convertView.findViewById(R.id.circle);
    }
    aName.setText(suggArray.get(position).getaName().toString());
    uName.setText(suggArray.get(position).getuName().toString());
    circle.setText(suggArray.get(position).getaName().toString().substring(0, 1));
    return convertView;
}

public Filter getFilter() {
    return mFilter;
}

public Filter mFilter  = new Filter() {
    @Override
    protected FilterResults performFiltering(final CharSequence constraint) {

        String filterString = constraint.toString().toLowerCase();

        FilterResults results = new FilterResults();

        final ArrayList<AccountDetails> nlist = new ArrayList<AccountDetails>();

        String filterableString ;

        for (AccountDetails accountDetails : rList ) {
            filterableString = accountDetails.getaName().toString();
            if (filterableString.toLowerCase().contains(filterString)) {
                Log.e("Values", "Model Value : "+filterableString + "  , String Value : " + constraint);
                nlist.add(accountDetails);
            }
        }

        results.values = nlist;
        results.count = nlist.size();
        return results;
    }

    @SuppressWarnings("unchecked")
    @Override
    protected void publishResults(CharSequence constraint, FilterResults results) {
        suggArray = (ArrayList<AccountDetails>) results.values;
        notifyDataSetChanged();
    }
};

}

1 个答案:

答案 0 :(得分：0)

这里有一些逻辑问题。

  1. 您覆盖主列表rList。您需要为此声明一个单独的建议清单。
  2. 您将nlist声明为主列表的相同大小。 final ArrayList<AccountDetails> nlist = new ArrayList<AccountDetails>(originalData.size());
  3. 您使用的索引i不应该是有效的位置。 originalData.get(i);

    4. 所以它会是这样的。

    解决方案

    第一

    清除ArrayList的新AccountDetails。 ArrayList<AccountDetails> suggArray= new ArrayList<AccountDetails>(); Al将rList替换为suggArray，以适应适配器中的任何位置（构造函数除外）。

    第二次

    ArrayList<AccountDetails> suggArray= new ArrayList<AccountDetails>();

    <强>第三

    像这样改变循环。 

    for (AccountDetails accountDetails : rList ) {
      filterableString = accountDetails.getaName().toString();
      if (filterableString.toLowerCase().contains(filterString)) {
            nlist.add(new AccountDetails(accountDetails.getaName().toString(),accountDetails.getuName().toString(),
                    accountDetails.getPwd().toString(),accountDetails.getwSite().toString(),accountDetails.getDesc().toString()));
      }
 }

    最后它看起来像这样。 

    public class RemainderAdapter extends BaseAdapter implements Filterable{
    private Context context;
    private ArrayList<AccountDetails> rList;
    private TextView aName,uName;
    ArrayList<AccountDetails> suggArray= new ArrayList<AccountDetails>();
    private ArrayList<AccountDetails> originalData = null;
    RemainderAdapter(Context context, ArrayList<AccountDetails> rList) {
        this.context = context;
        this.rList = rList;
        this.suggArray = rList;
        this.originalData=rList;
    }

    @Override
    public int getCount() {
        return suggArray.size();
    }

    @Override
    public Object getItem(int position) {
        return suggArray.get(position);
    }

    @Override
    public long getItemId(int position) {
        return 0;
    }

    @Override
    public View getView(final int position, View convertView, final ViewGroup parent) {
        if (convertView == null) {
            LayoutInflater inflater = (LayoutInflater) context.getSystemService(context.LAYOUT_INFLATER_SERVICE);
            convertView = inflater.inflate(R.layout.list_item, parent, false);
            aName = (TextView) convertView.findViewById(R.id.aName);
            uName = (TextView) convertView.findViewById(R.id.uName);
        }
        aName.setText(suggArray.get(position).getaName().toString());
        uName.setText(suggArray.get(position).getuName().toString());
        return convertView;
    }

    public Filter getFilter() {
        return mFilter;
    }

    public Filter mFilter  = new Filter() {
    @Override
    protected FilterResults performFiltering(final CharSequence constraint) {

        String filterString = constraint.toString().toLowerCase();

        FilterResults results = new FilterResults();

        final ArrayList<AccountDetails> nlist = new ArrayList<AccountDetails>();

        String filterableString ;

        for (AccountDetails accountDetails : rList ) {
            filterableString = accountDetails.getaName().toString();
            Log.e("Values","Model Value : "filterableString +"  , String Value : "+constraint); // Check Here
            if (filterableString.toLowerCase().contains(filterString)) {
                nlist.add(accountDetails);
            }
        }

        results.values = nlist;
        results.count = nlist.size();

        return results;
    }

    @SuppressWarnings("unchecked")
    @Override
    protected void publishResults(CharSequence constraint, FilterResults results) {
        suggArray = (ArrayList<AccountDetails>) results.values;
        notifyDataSetChanged();
    }
  };
}
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