我正在使用AutoCompleteTextView，我的autocompletetextview的最终结果应该是这样的link（From和To）
但我在setText有一个错误。它告诉我这个
对于String
类型，方法setText（String）未定义
我不知道它有什么问题。错误是在FindMePlace.java请帮助我。
AutoCompleteDBAdapter.java
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import android.app.Activity;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteException;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;
public class AutoCompleteDbAdapter {
private static final int DATABASE_VERSION = 1;
private static final String DB_PATH = "data/data/com.example.ukmlocationsearching/databases/";
private static final String DATABASE_NAME = "AcademicLocation";
private static final String TABLE_NAME = "UKMRoute";
private static final String KEY_ROUTEID = "ID_route";
private static final String KEY_FROMLOCATION = "FromLocation";
private static final String KEY_TODESTINATION = "ToDestination";
private static final String KEY_ROUTE1 = "Route1";
private static final String KEY_ROUTE2 = "Route2";
private DatabaseHelper mDbHelper;
private SQLiteDatabase mDb;
private final Activity mActivity;
// private final Context myContext;
private class DatabaseHelper extends SQLiteOpenHelper {
DatabaseHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
public void createDataBase() throws IOException {
boolean dbExist = checkDataBase();
if (dbExist) {
// do nothing - database already exist
} else {
// By calling this method and empty database will be created
// into the default system path
// of your application so we are gonna be able to overwrite that
// database with our database.
this.getReadableDatabase();
try {
copyDataBase();
} catch (IOException e) {
throw new Error("Error copying database");
}
}
}
private boolean checkDataBase() {
SQLiteDatabase checkDB = null;
try {
String myPath = DB_PATH + DATABASE_NAME;
checkDB = SQLiteDatabase.openDatabase(myPath, null,
SQLiteDatabase.OPEN_READONLY);
} catch (SQLiteException e) {
// database does't exist yet.
}
if (checkDB != null) {
checkDB.close();
}
return checkDB != null ? true : false;
}
private void copyDataBase() throws IOException {
// Open your local db as the input stream
InputStream myInput = mActivity.getAssets().open(DATABASE_NAME);
// Path to the just created empty db
String outFileName = DB_PATH + DATABASE_NAME;
// Open the empty db as the output stream
OutputStream myOutput = new FileOutputStream(outFileName);
// transfer bytes from the inputfile to the outputfile
byte[] buffer = new byte[1024];
int length;
while ((length = myInput.read(buffer)) > 0) {
myOutput.write(buffer, 0, length);
}
// Close the streams
myOutput.flush();
myOutput.close();
myInput.close();
}
public void openDataBase() throws SQLException {
// Open the database
String myPath = DB_PATH + DATABASE_NAME;
mDb = SQLiteDatabase.openDatabase(myPath, null,
SQLiteDatabase.OPEN_READONLY);
}
@Override
public synchronized void close() {
if (mDb != null)
mDb.close();
super.close();
}
// Creating Tables
@Override
public void onCreate(SQLiteDatabase db) {
}
// Upgrading database
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
}
}
public AutoCompleteDbAdapter(Activity activity) {
this.mActivity = activity;
}
public AutoCompleteDbAdapter open() throws SQLException {
mDbHelper = this.new DatabaseHelper(mActivity);
mDb = mDbHelper.getWritableDatabase();
return this;
}
/**
* Closes the database.
*/
public void close() {
if (mDbHelper != null){
mDbHelper.close();
}
}
//-------------------------------------------------------------------------------------
/**
* Return a Cursor that returns all states (and their state capitals) where
* the state name begins with the given constraint string.
*
* @param constraint
* Specifies the first letters of the states to be listed. If
* null, all rows are returned.
* @return Cursor managed and positioned to the first state, if found
* @throws SQLException
* if query fails
*/
public Cursor getMatchingFromLocation(String constraint) throws SQLException {
String queryString = "SELECT * FROM " + TABLE_NAME;
if (constraint != null) {
// Query for any rows where the state name begins with the
// string specified in constraint.
//
// NOTE:
// If wildcards are to be used in a rawQuery, they must appear
// in the query parameters, and not in the query string proper.
// See http://code.google.com/p/android/issues/detail?id=3153
constraint = constraint.trim() + "%";
queryString += " WHERE FromLocation LIKE ?";
}
String params[] = { constraint };
if (constraint == null) {
// If no parameters are used in the query,
// the params arg must be null.
params = null;
}
try {
Cursor cursor = mDb.rawQuery(queryString, params);
if (cursor != null) {
this.mActivity.startManagingCursor(cursor);
cursor.moveToFirst();
return cursor;
}
} catch (SQLException e) {
Log.e("AutoCompleteDbAdapter", e.toString());
throw e;
}
return null;
}
/**
* Populates the database with data on states and state capitals.
*
* @param db
* The database to be populated; must have the appropriate table
* ("state") and columns ("state" and "values") already set up.
*/
// Adding new Poi
public void addUkmRoute(UkmRoute Ukmroute) {
//SQLiteDatabase db = this.getWritableDatabase();
ContentValues values = new ContentValues();
values.put(KEY_ROUTEID, Ukmroute.getID()); // ID
values.put(KEY_FROMLOCATION, Ukmroute.getFromLocation()); // from
values.put(KEY_TODESTINATION, Ukmroute.getToDestination()); // to
values.put(KEY_ROUTE1, Ukmroute.getRoute1()); // route1
values.put(KEY_ROUTE2, Ukmroute.getRoute2()); // route2
// Inserting Row
mDb.insert(DATABASE_NAME, null, values);
mDb.close(); // Closing database connection
}
}
FindMePlace.java
package com.example.series1;
import android.os.Bundle;
import android.app.Activity;
import android.content.Context;
import android.database.Cursor;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.AutoCompleteTextView;
import android.widget.Button;
import android.widget.CursorAdapter;
import android.widget.TextView;
public class FindMePlace extends Activity {
private AutoCompleteDbAdapter mDbHelper;
private AutoCompleteTextView fromLocation, toDestination;
Button search;
class ItemAutoTextAdapter extends CursorAdapter implements
android.widget.AdapterView.OnItemClickListener {
private AutoCompleteDbAdapter mDbHelper;
public ItemAutoTextAdapter(AutoCompleteDbAdapter dbHelper) {
// Call the CursorAdapter constructor with a null Cursor.
super(FindMePlace.this, null);
mDbHelper = dbHelper;
}
//------------------------------------------------------------------------------------
@Override
public Cursor runQueryOnBackgroundThread(CharSequence constraint) {
if (getFilterQueryProvider() != null) {
return getFilterQueryProvider().runQuery(constraint);
}
Cursor cursor = mDbHelper
.getMatchingFromLocation((constraint != null ? constraint
.toString() : null));
return cursor;
}
@Override
public String convertToString(Cursor cursor) {
//ubah name table name
final int columnIndex = cursor.getColumnIndexOrThrow("FromLocation");
final String str = cursor.getString(columnIndex);
return str;
}
@Override
public void bindView(View view, Context context, Cursor cursor) {
/*final String text = convertToString(cursor);
((TextView) view).setText(text);*/
final int fromColumnIndex = cursor.getColumnIndexOrThrow("FromLocation");
final int toColumnIndex = cursor.getColumnIndexOrThrow("ToDestination");
TextView text1 = (TextView) view.findViewById(R.id.text1);
text1.setText(cursor.getString(fromColumnIndex));
TextView text2 = (TextView) view.findViewById(R.id.text1);
text2.setText(cursor.getString(toColumnIndex));
}
@Override
public View newView(Context context, Cursor cursor, ViewGroup parent) {
final LayoutInflater inflater = LayoutInflater.from(context);
//final View view = inflater.inflate(android.R.layout.simple_dropdown_item_1line, parent, false);
final View view = inflater.inflate(R.layout.list_item, parent, false);
return view;
}
//-------------------------------------------------------------------------------------------
@Override
public void onItemClick(AdapterView<?> listView, View view,
int position, long id) {
// Get the cursor, positioned to the corresponding row in the result
// set
Cursor cursor = (Cursor) listView.getItemAtPosition(position);
// Get the state's capital from this row in the database.
//**kene ubah*************capital nama database
String fromLocation = cursor.getString(cursor.getColumnIndexOrThrow("FromLocation"));
String toDestination = cursor.getString(cursor.getColumnIndexOrThrow("ToDestination"));
// Update the parent class's TextView
//mStateCapitalView.setText(fromLocation);
fromLocation.setText("");
}
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.find_me_place);
AutoCompleteDbAdapter dbHelper = new AutoCompleteDbAdapter(this);
dbHelper.open();
fromLocation = (AutoCompleteTextView) findViewById(R.id.locationTxt);
toDestination = (AutoCompleteTextView) findViewById(R.id.destinationTxt);
search = (Button) findViewById(R.id.button1);
ItemAutoTextAdapter adapter = this.new ItemAutoTextAdapter(dbHelper);
fromLocation.setAdapter(adapter);
fromLocation.setOnItemClickListener(adapter);
toDestination.setAdapter(adapter);
toDestination.setOnItemClickListener(adapter);
/*AutoCompleteTextView fromLocation = (AutoCompleteTextView) findViewById(R.id.locationTxt);
ArrayAdapter<String> arrayAdapter = new ArrayAdapter<String>(this, R.layout.country_list, COUNTRIES);
fromLocation.setAdapter(arrayAdapter); */
search.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
setResult(RESULT_OK);
finish();
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.find_me_place, menu);
return true;
}
}
答案 0 :(得分：1)
String fromLocation = cursor.getString(cursor.getColumnIndexOrThrow("FromLocation"));
String toDestination = cursor.getString(cursor.getColumnIndexOrThrow("ToDestination"));
// Update the parent class's TextView
//mStateCapitalView.setText(fromLocation);
fromLocation.setText("");
fromLocation是一个String实例。 String类没有setText()方法。您要么使用fromLocation = ""设置字符串值，要么意味着使用text1.setText("")设置“from”TextView的文本。我不知道哪个，因为你没有用那条线描述你的意图，而是从评论中我假设后者。