我有一个自动完成功能，可以对数据库进行查询....当点击自动完成中显示的某个条目时，我想要点击我点击的项目并显示它...为此我实现了onClickListener：
这是我的代码：
AutoCompleteTextView textView = (AutoCompleteTextView)findViewById(R.id.autocomplete_from);
ContactListCursorAdapter adapter = new ContactListCursorAdapter(this,
cursor);
textView.setAdapter(adapter);
textView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0,View arg1,int arg2,long arg3){
System.out.println("Click la autocomplet pe :" +arg0.getItemAtPosition(arg2).toString());
}
});
但这是我的System.out显示的内容：
Click la autocomplet pe :android.database.sqlite.SQLiteCursor@43c33e18
Click la autocomplet pe :android.database.sqlite.SQLiteCursor@43c33e18
任何人都知道如何做到这一点，因为这显然不适合我！
这是我的整个代码：
我正在做的是将自动完成功能与数据库绑定.....一旦我开始输入我的自动完成功能，就会显示我的数据库中的2列内容......当然是用我的内容过滤的开始输入：
公共类Server8扩展MapActivity { DBAdapter db; CharSequence constraint1; MapView mapView; 私人MapController mc; 私人ProgressDialog进展; InitTask init_task = null; String user_id;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.server8);
AutoCompleteTextView textView = (AutoCompleteTextView) findViewById(R.id.autocomplete_from);
progress = new ProgressDialog(this);
progress.setIndeterminate(true);
progress.setMessage("I am thinking");
db = new DBAdapter(this);
db.createDatabase();
db.openDataBase();
Cursor cursor = db.getAllData2();
textView.setHint("type route");
textView.setThreshold(2);
startManagingCursor(cursor);
mapView = (MapView) findViewById(R.id.mapview);
mapView.setBuiltInZoomControls(true);
mapView.setStreetView(true);
mapView.setSatellite(true);
mc = mapView.getController();
mc.setZoom(10);
ContactListCursorAdapter adapter = new ContactListCursorAdapter(this,
cursor);
textView.setAdapter(adapter);
textView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
Cursor c = (Cursor) arg0.getItemAtPosition(arg2);
int nameCol = c.getColumnIndex(db.KEY_ROWID_2);
user_id = c.getString(nameCol);
init_task = new InitTask();
init_task.execute(db);
}
});
Button b=(Button)findViewById(R.id.stop);
b.setOnClickListener(new View.OnClickListener(){
public void onClick(View arg1) {
System.out.println("Click pe butonul stop!");
init_task.cancel(true);
}
}）;
}
public void theRouteDraw(GeoPoint p) {
mc.animateTo(p);
mc.setZoom(17);
mapView.setSatellite(true);
mapView.setStreetView(true);
mapView.invalidate();
}
class myOverlay extends Overlay {
GeoPoint gp1;
GeoPoint gp2;
public myOverlay(GeoPoint gp1, GeoPoint gp2) {
this.gp1 = gp1;
this.gp2 = gp2;
}
public void draw(Canvas canvas, MapView mapView, boolean shadow) {
Projection projection = mapView.getProjection();
Paint mPaint = new Paint();
Point from = new Point();
projection.toPixels(gp1, from);
mPaint.setColor(Color.BLUE);
Point to = new Point();
projection.toPixels(gp2, to);
mPaint.setStrokeWidth(9);
mPaint.setAlpha(120);
canvas.drawLine(from.x, from.y, to.x, to.y, mPaint);
super.draw(canvas, mapView, shadow);
}
}
public class InitTask extends AsyncTask<DBAdapter, GeoPoint, Void> {
List<GeoPoint> geoPointsArray = new ArrayList<GeoPoint>();
DBAdapter db;
int latitude;
int longitude;
GeoPoint p;
String TABLE_3;
protected void onPreExecute() {
progress.show();
}
protected Void doInBackground(DBAdapter... db) {
try {
//db[0].openDataBase();
Cursor c = db[0].getCursor3(db[0].TABLE_3, user_id);
if (c.moveToFirst()) {
do {
longitude = (int) Double.parseDouble(c.getString(1));
latitude = (int) Double.parseDouble(c.getString(2));
System.out.println("Valoarea latitudinii" + latitude
+ longitude);
p = new GeoPoint(longitude, latitude);
publishProgress(p);
Thread.sleep(2500);
} while (c.moveToNext());
}
c.close();
db[0].close();
} catch (Exception e) {
Log.d("Eroare", "doInBackground", e);
}
return null;
}
protected void onProgressUpdate(GeoPoint... progress1) {
try {
if (geoPointsArray.size() == 1) {
mapView.getOverlays().add(
new myOverlay(geoPointsArray.get(0), geoPointsArray
.get(0)));
theRouteDraw(progress1[0]);
}
} catch (Exception e) {
e.printStackTrace();
}
if (geoPointsArray.size() > 1) {
int i = geoPointsArray.size();
List overlays = mapView.getOverlays();
overlays.add(new myOverlay(geoPointsArray.get(i - 1),
progress1[0]));
theRouteDraw(progress1[0]);
}
geoPointsArray.add(progress1[0]);
}
}
public class ContactListCursorAdapter extends CursorAdapter implements
Filterable {
private Context context;
private TextView mName, mNumber;
public ContactListCursorAdapter(Context context, Cursor cursor) {
super(context, cursor);
this.context = context;
}
@Override
public View newView(Context context, Cursor cursor, ViewGroup parent) {
Cursor c = getCursor();
final LinearLayout ret = new LinearLayout(context);
final LayoutInflater inflater = LayoutInflater.from(context);
mName = (TextView) inflater.inflate(
android.R.layout.simple_dropdown_item_1line, parent, false);
mNumber = (TextView) inflater.inflate(
android.R.layout.simple_dropdown_item_1line, parent, false);
ret.setOrientation(LinearLayout.HORIZONTAL);
LinearLayout horizontal = new LinearLayout(context);
horizontal.setOrientation(LinearLayout.HORIZONTAL);
int nameCol = c.getColumnIndex(db.KEY_SURSA);
String name = c.getString(nameCol);
String number = c.getString(c.getColumnIndex(db.KEY_DATE));
mName.setText(name);
mNumber.setText(number);
horizontal.addView(mName, new LinearLayout.LayoutParams(
LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
ret.addView(mNumber, new LinearLayout.LayoutParams(
LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
ret.addView(horizontal, new LinearLayout.LayoutParams(
LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
return ret;
}
@Override
public void bindView(View view, Context context, Cursor cursor) {
int nameCol = cursor.getColumnIndex(db.KEY_SURSA);
String name = cursor.getString(nameCol);
String number = cursor
.getString(cursor.getColumnIndex(db.KEY_DATE));
((TextView) ((LinearLayout) view).getChildAt(0)).setText(number);
LinearLayout horizontal = (LinearLayout) ((LinearLayout) view)
.getChildAt(1);
((TextView) horizontal.getChildAt(0)).setText(name);
}
public CharSequence convertToString(Cursor cursor) {
int numcol = cursor.getColumnIndexOrThrow(db.KEY_SURSA);
String name = cursor.getString(numcol);
return name;
}
@Override
public Cursor runQueryOnBackgroundThread(CharSequence constraint) {
if (getFilterQueryProvider() != null) {
return getFilterQueryProvider().runQuery(constraint);
}
String filter = "";
if (constraint == null)
filter = "";
else
filter = constraint.toString();
Cursor cursor = db.getCursor(filter);
return cursor;
}
}
public void onDestroy(){
super.onDestroy();
db.close();
}
protected void onPause() {
super.onPause();
if(init_task!=null){
init_task.cancel(true);
init_task=null;
}
}
protected boolean isRouteDisplayed() {
// TODO Auto-generated method stub
return false;
}
这是我点击它时自动完成功能的行为：
textView.setOnItemClickListener（new OnItemClickListener（）{
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
Cursor c = (Cursor) arg0.getItemAtPosition(arg2);
int nameCol = c.getColumnIndex(db.KEY_ROWID_2);
user_id = c.getString(nameCol);
init_task = new InitTask();
init_task.execute(db);
}
});
答案 0 :(得分：2)
@embry此文本视图的onItemclickListener将返回光标而不是光标内的项目。
在自定义游标适配器（ContactListCursorAdapter）中，您将实现一个名为covertToString（Cursor）的方法。此方法指示用户单击自动完成列表中的每个条目时显示的内容。您可以在此处获取所选值。
@Override
public String convertToString(Cursor cursor) {
// this method dictates what is shown when the user clicks each entry in your autocomplete list
String name="";
name = cursor.getString(cursor.getColumnIndex("column1"))
Id = cursor.getInt(cursor.getColumnIndex("_id"));
return name;
}
public int getId(){
return Id;
}
我在convertToString（）中获取了id。和方法getId（）返回id。所以在主要方法
AutoCompleteTextView textView = (AutoCompleteTextView)findViewById(R.id.autocomplete_from);
ContactListCursorAdapter adapter = new ContactListCursorAdapter(this, cursor);
int Id = adapter.getDrugId();
这对我有用。我不确定这是否正确。