##这是我的代码。我使用SQLite数据库和json创建了过滤的listview。但是当我搜索数据时，例如，如果名字是Shreya Patil，那么它只显示我的名字shreya的结果而不是她的姓氏。如果我正在键入patil结果是什么。请帮助.. ##
以下是活动类的摘录：
public class DirectoryActivity extends BaseActivity {
private SQLiteDbAdapter dbHelper;
private SimpleCursorAdapter dataAdapter;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_directory_home_profile);
dbHelper = new SQLiteDbAdapter(this);
dbHelper.open();
//Clean all data
dbHelper.deleteAllData();
displayListView();
getPolicianInfo();
}
private void displayListView() {
Cursor cursor = dbHelper.fetchAllData();
Log.e("Getting all data", "data");
// The desired columns to be bound
String[] columns = new String[] {
SQLiteDbAdapter.USER_ID,
SQLiteDbAdapter.POLITICIAN_FIRST_NAME,
SQLiteDbAdapter.POLITICIAN_DESIGNATION,
SQLiteDbAdapter.POLITICIAN_CONTACT,
SQLiteDbAdapter.POLITICIAN_IMAGE_URL,
SQLiteDbAdapter.POLITICIAN_CITY,
SQLiteDbAdapter.POLITICIAN_HOUSE,
};
// the XML defined views which the data will be bound to
int[] to = new int[] {
R.id.directory_item_name_tv_name,
R.id.directory_item_name_tv_last_name,
/* R.id.directory_item_name_tv_last_Test,*/
R.id.directory_item_name_tv_designation,
R.id.directory_item_name_tv_contact,
R.id.directory_item_iv_picture,
};
// create the adapter using the cursor pointing to the desired data
//as well as the layout information
dataAdapter = new SimpleCursorAdapter(
this, R.layout.list_item_directory_lv, cursor, columns,to, 0);
ListView listView = (ListView) findViewById(R.id.directory_search_lv);
listView.setTextFilterEnabled(true);
// Assign adapter to ListView
listView.setAdapter(dataAdapter);
dataAdapter.setFilterQueryProvider(new FilterQueryProvider() {
public Cursor runQuery(CharSequence constraint) {
return dbHelper.fetchPoliticansByName(constraint.toString());
}
});
EditText myFilter = (EditText) findViewById(R.id.myFilter);
myFilter.addTextChangedListener(new TextWatcher() {
public void afterTextChanged(Editable s) {
}
public void beforeTextChanged(CharSequence s, int start,
int count, int after) {
}
public void onTextChanged(CharSequence s, int start,
int before, int count) {
//dataAdapter.getFilter().filter(s.toString());
DirectoryActivity.this.dataAdapter.getFilter().filter(s);
}
});
}
private void getPolicianInfo() {
if (Util.isNetworkAvailable(this)) {
try {
API apis = RetrofitClient.getApiClient(Util.DOMAIN_NAME);
Callback<JsonElement> responseListner = new Callback<JsonElement>() {
@Override
public void success(JsonElement responseSuccess, Response response) {
Log.e("responseSuccess", responseSuccess.toString());
if (responseSuccess != null) {
Log.e("responseSuccess success", responseSuccess.toString());
Log.e("response in success", response.toString());
try {
JSONObject object = new JSONObject(responseSuccess.toString());
{
JSONArray jsonMainNode = object.getJSONArray("posts");
int lengthJsonArr = jsonMainNode.length();
for (int i = 0; i < lengthJsonArr; i++) {
/****** Get Object for each JSON node.***********/
JSONObject jsonChildNode = jsonMainNode.getJSONObject(i);
String user_id = jsonChildNode.getString("id");
String politician_first_name = jsonChildNode.getString("name");
String politician_designation = jsonChildNode.getString("designation");
String politician_contact = jsonChildNode.getString("contact");
String politician_image_url = jsonChildNode.getString("img_url");
String politician_city = jsonChildNode.getString("city");
String politician_house = jsonChildNode.getString("house");
if (politician_designation.isEmpty())
{
politician_designation="NA";
Log.e("Tag2",politician_designation);
}
if (politician_contact.isEmpty())
{
politician_contact="NA";
Log.e("Tag3",politician_contact);
}
dbHelper.createPoliticianInfoData(user_id, politician_first_name,politician_designation,
politician_contact, politician_image_url, politician_city, politician_house);
}
}
} catch (Exception e) {
e.printStackTrace();
}
} else {
Toast.makeText(getApplicationContext(), "Network Connection Failed", Toast.LENGTH_SHORT).show();
Log.e("response in success", response.toString());
}
}
@Override
public void failure(RetrofitError error) {
Log.e("tag", error.toString());
Toast.makeText(getApplicationContext(), "Network Connection Failed from failure method", Toast.LENGTH_SHORT).show();
}
};
apis.getPolicianInfo(responseListner);
} catch (Exception e) {
e.printStackTrace();
}
} else {
Toast.makeText(getApplicationContext(), "Please Check Your Internet Connection", Toast.LENGTH_SHORT).show();
}
}
}
//这是数据库类
public class SQLiteDbAdapter {
public static final String KEY_ROWID = "_id";
public static final String USER_ID = "id";
public static final String POLITICIAN_FIRST_NAME = "name";
public static final String POLITICIAN_DESIGNATION = "designation";
public static String POLITICIAN_CONTACT = "contact";
public static String POLITICIAN_IMAGE_URL = "img_url";
public static String POLITICIAN_CITY = "city";
public static String POLITICIAN_HOUSE = "house";
private static final String TAG = "SQLiteDbAdapter";
private DatabaseHelper mDbHelper;
private SQLiteDatabase mDb;
private static final String DATABASE_NAME = "World";
private static final String SQLITE_TABLE = "Country";
private static final int DATABASE_VERSION = 1;
private final Context mCtx;
private static final String DATABASE_CREATE =
"CREATE TABLE if not exists " + SQLITE_TABLE + " (" +
KEY_ROWID + " integer PRIMARY KEY autoincrement," +
USER_ID + "," +
POLITICIAN_FIRST_NAME + "," +
POLITICIAN_DESIGNATION + "," +
POLITICIAN_CONTACT + "," +
POLITICIAN_IMAGE_URL + "," +
POLITICIAN_CITY + "," +
POLITICIAN_HOUSE + "," +
" UNIQUE (" + KEY_ROWID +"));";
private static class DatabaseHelper extends SQLiteOpenHelper {
DatabaseHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
@Override
public void onCreate(SQLiteDatabase db) {
Log.w(TAG, DATABASE_CREATE);
db.execSQL(DATABASE_CREATE);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
Log.w(TAG, "Upgrading database from version " + oldVersion + " to "
+ newVersion + ", which will destroy all old data");
db.execSQL("DROP TABLE IF EXISTS " + SQLITE_TABLE);
onCreate(db);
}
}
public SQLiteDbAdapter(Context ctx) {
this.mCtx = ctx;
}
public SQLiteDbAdapter open() throws SQLException {
mDbHelper = new DatabaseHelper(mCtx);
mDb = mDbHelper.getWritableDatabase();
return this;
}
public void close() {
if (mDbHelper != null) {
mDbHelper.close();
}
}
public long createPoliticianInfoData(String user_id, String politician_first_name,
String politician_designation, String politician_contact,
String politician_image_url, String politician_city, String politician_house) {
ContentValues initialValues = new ContentValues();
initialValues.put(USER_ID, user_id);
initialValues.put(POLITICIAN_FIRST_NAME, politician_first_name);
initialValues.put(POLITICIAN_DESIGNATION, politician_designation);
initialValues.put(POLITICIAN_CONTACT, politician_contact);
initialValues.put(POLITICIAN_IMAGE_URL, politician_image_url);
initialValues.put(POLITICIAN_CITY, politician_city);
initialValues.put(POLITICIAN_HOUSE, politician_house);
int cc=(int) mDb.insert(SQLITE_TABLE, null, initialValues);
//Log.e("insert ", ""+cc);
return cc;
}
public boolean deleteAllData() {
int doneDelete = 0;
doneDelete = mDb.delete(SQLITE_TABLE, null , null);
Log.w(TAG, Integer.toString(doneDelete));
return doneDelete > 0;
}
public Cursor fetchPoliticansByName(String inputText) throws SQLException {
Log.w(TAG, inputText);
Cursor mCursor = null;
if (inputText == null || inputText.length () == 0) {
mCursor = mDb.query(SQLITE_TABLE, new String[] {KEY_ROWID,
USER_ID, POLITICIAN_FIRST_NAME,POLITICIAN_DESIGNATION,
POLITICIAN_CONTACT,POLITICIAN_IMAGE_URL,POLITICIAN_CITY,POLITICIAN_HOUSE},
null, null, null, null, null);
}
else {
mCursor = mDb.query(true, SQLITE_TABLE, new String[] {KEY_ROWID,
USER_ID, POLITICIAN_FIRST_NAME,POLITICIAN_DESIGNATION,
POLITICIAN_CONTACT,POLITICIAN_IMAGE_URL,POLITICIAN_CITY,POLITICIAN_HOUSE},
POLITICIAN_FIRST_NAME + " like '" + inputText + "%' OR "
/* + POLITICIAN_LAST_NAME + " like '"+inputText+"%' OR "*/
+ POLITICIAN_DESIGNATION + " like '"+inputText+"%' OR "
+ POLITICIAN_CITY + " like '"+inputText+"%' OR "
+ POLITICIAN_HOUSE + " like '"+inputText+"%'",
null, null, null, null, null);
}
if (mCursor != null) {
mCursor.moveToFirst();
}
return mCursor;
}
public Cursor fetchAllData() {
Cursor mCursor = mDb.query(SQLITE_TABLE, new String[] {KEY_ROWID,
USER_ID, POLITICIAN_FIRST_NAME,POLITICIAN_DESIGNATION,
POLITICIAN_CONTACT,POLITICIAN_IMAGE_URL,POLITICIAN_CITY,POLITICIAN_HOUSE},
null, null, null, null, null);
Log.e("Cursor vallue display", "data"+mCursor);
if (mCursor != null) {
mCursor.moveToFirst();
Log.e("Cursor vallue display", "datafgdfxg" +mCursor.getCount());
}
return mCursor;
}
}
答案 0 :(得分：0)
是。在listl的aml布局文件中添加EditText。并在您的活动/片段..
lv = (ListView) findViewById(R.id.list_view);
inputSearch = (EditText) findViewById(R.id.inputSearch);
// Adding items to listview
adapter = new ArrayAdapter<String>(this, R.layout.list_item, R.id.product_name, products);
lv.setAdapter(adapter);
inputSearch.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence cs, int arg1, int arg2, int arg3) {
// When user changed the Text
MainActivity.this.adapter.getFilter().filter(cs);
}
@Override
public void beforeTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) { }
@Override
public void afterTextChanged(Editable arg0) {}
});
这里的基本操作是将OnTextChangeListener添加到编辑文本中，并在其回调方法中将过滤器应用于listview的适配器。
要过滤到自定义BaseAdapter，您需要实现Filterable接口。
class CustomAdapter extends BaseAdapter implements Filterable {
public View getView(){
...
}
public Integer getCount()
{
...
}
@Override
public Filter getFilter() {
Filter filter = new Filter() {
@SuppressWarnings("unchecked")
@Override
protected void publishResults(CharSequence constraint, FilterResults results) {
arrayListNames = (List<String>) results.values;
notifyDataSetChanged();
}
@Override
protected FilterResults performFiltering(CharSequence constraint) {
FilterResults results = new FilterResults();
ArrayList<String> FilteredArrayNames = new ArrayList<String>();
// perform your search here using the searchConstraint String.
constraint = constraint.toString().toLowerCase();
for (int i = 0; i < mDatabaseOfNames.size(); i++) {
String dataNames = mDatabaseOfNames.get(i);
if (dataNames.toLowerCase().startsWith(constraint.toString())) {
FilteredArrayNames.add(dataNames);
}
}
results.count = FilteredArrayNames.size();
results.values = FilteredArrayNames;
Log.e("VALUES", results.values.toString());
return results;
}
};
return filter;
}
}
在perfromFiltering（）内部，您需要将搜索查询与数据库中的值进行实际比较。它会将其结果传递给publishResults（）方法。