问题
when i use the serachbox for my Listview, i get everytime the same result. For Example:
Car Flower Hate Love Water
When I typef or h or l etc. the result is Car. I worked with this example http://androidcocktail.blogspot.in/2012/04/search-custom-listview-in-android.html
Activity:
package de.bodprod.rettinfo;
import java.util.ArrayList;
import java.util.HashMap;
import android.app.ListActivity;
import android.content.Context;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.TextView;
public class AntidotList extends ListActivity{
ArrayList<HashMap<String, Object>> antidots;
ArrayList<HashMap<String, Object>> antidotsResult;
LayoutInflater inflater;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.antidotlist_layout);
final EditText searchBox=(EditText) findViewById(R.id.EditText01);
ListView antidotListView=(ListView) findViewById(android.R.id.list);
inflater=(LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
antidots = new ArrayList<HashMap<String,Object>>();
DatabaseHandler db = new DatabaseHandler(getApplicationContext());
antidots = db.getAllAntidots();
antidotsResult = new ArrayList<HashMap<String,Object>>(antidots);
final CustomAdapter adapter = new CustomAdapter(this, R.layout.antidotlist_layout, antidotsResult);
antidotListView.setAdapter(adapter);
searchBox.addTextChangedListener(new TextWatcher() {
public void onTextChanged(CharSequence s, int start, int before, int count) {
//get the text in the EditText
String searchString=searchBox.getText().toString();
int textLength=searchString.length();
antidotsResult.clear();
for(int i=0;i<antidots.size();i++){
String toxinname=antidots.get(i).get("toxin").toString();
if(textLength<=toxinname.length()){
if(searchString.equalsIgnoreCase(toxinname.substring(0,textLength)))
antidotsResult.add(antidots.get(i));
}
}
adapter.notifyDataSetChanged();
}
public void beforeTextChanged(CharSequence s, int start, int count, int after) {}
public void afterTextChanged(Editable s) {}
});
}
private class CustomAdapter extends ArrayAdapter<HashMap<String, Object>>{
public CustomAdapter(Context context, int textViewResourceId, ArrayList<HashMap<String, Object>> Strings) {
super(context, textViewResourceId, Strings);
}
private class ViewHolder{
TextView sqlite_id, tox_layout, antidot_layout;
}
ViewHolder viewHolder;
@Override
public View getView(int position, View convertView, ViewGroup parent) {
if(convertView==null){
convertView=inflater.inflate(R.layout.antidotlistitem_layout, null);
viewHolder=new ViewHolder();
viewHolder.sqlite_id=(TextView) convertView.findViewById(R.id.sqlite_id);
viewHolder.tox_layout=(TextView) convertView.findViewById(R.id.tox_layout);
viewHolder.antidot_layout=(TextView) convertView.findViewById(R.id.antidot_layout);
convertView.setTag(viewHolder);
}else{
viewHolder=(ViewHolder) convertView.getTag();
}
viewHolder.sqlite_id.setText(antidots.get(position).get("sql_id").toString());
viewHolder.tox_layout.setText(antidots.get(position).get("toxin").toString());
viewHolder.antidot_layout.setText(antidots.get(position).get("antidot").toString());
return convertView;
}
}
}
DatabaseHandler:
package de.bodprod.rettinfo;
import java.util.ArrayList;
import java.util.HashMap;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;
public class DatabaseHandler extends SQLiteOpenHelper {
// All Static variables
// Database Version
private static final int DATABASE_VERSION = 7;
// Database Name
private static final String DATABASE_NAME = "rettinfo";
// Antidot table name
private static final String TABLE_ANTIDOT = "antidotlist";
// Antidot Table Columns names
private static final String KEY_ID = "id";
private static final String KEY_TOX = "tox";
private static final String KEY_ANTIDOT = "antidot";
private static final String KEY_DOS = "dos";
private static final String KEY_KAT = "kat";
public DatabaseHandler(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
// Creating Tables
@Override
public void onCreate(SQLiteDatabase db) {
Log.d("Create: ", "Creating ..");
String CREATE_ANTIDOT_TABLE = "CREATE TABLE " + TABLE_ANTIDOT + "("
+ KEY_ID + " INTEGER PRIMARY KEY," + KEY_TOX + " TEXT,"
+ KEY_ANTIDOT + " TEXT," + KEY_DOS + " TEXT," + KEY_KAT + " INTEGER" + ")";
Log.d("Create: ", CREATE_ANTIDOT_TABLE);
db.execSQL(CREATE_ANTIDOT_TABLE);
ContentValues values = new ContentValues();
values.put(KEY_TOX, "Alkylphosphat");
values.put(KEY_ANTIDOT, "Atropinsulfat");
values.put(KEY_DOS, "Initial: 2 - 5 mg i.V. alle 10 bis 15 Min 
 Kinder - Initial: 0,5 - 2 mg i.V. 
 bis zum Rückgang der Bronchialsekretion");
values.put(KEY_KAT, "1");
db.insert(TABLE_ANTIDOT, null, values);
values.put(KEY_TOX, "E605 (Alkylphosphat)");
values.put(KEY_ANTIDOT, "Atropinsulfat");
values.put(KEY_DOS, "Initial: 2 - 5 mg i.V. alle 10 bis 15 Min 
 Kinder - Initial: 0,5 - 2 mg i.V. 
 bis zum Rückgang der Bronchialsekretion");
values.put(KEY_KAT, "1");
db.insert(TABLE_ANTIDOT, null, values);
values.put(KEY_TOX, "DDVP (Alkylphosphat)");
values.put(KEY_ANTIDOT, "Atropinsulfat");
values.put(KEY_DOS, "Initial: 2 - 5 mg i.V. alle 10 bis 15 Min 
 Kinder - Initial: 0,5 - 2 mg i.V. 
 bis zum Rückgang der Bronchialsekretion");
values.put(KEY_KAT, "1");
db.insert(TABLE_ANTIDOT, null, values);
values.put(KEY_TOX, "Sarin (Alkylphosphat)");
values.put(KEY_ANTIDOT, "Atropinsulfat");
values.put(KEY_DOS, "Initial: 2 - 5 mg i.V. alle 10 bis 15 Min 
 Kinder - Initial: 0,5 - 2 mg i.V. 
 bis zum Rückgang der Bronchialsekretion");
values.put(KEY_KAT, "1");
db.insert(TABLE_ANTIDOT, null, values);
values.put(KEY_TOX, "Nervengas (Alkylphosphat)");
values.put(KEY_ANTIDOT, "Atropinsulfat");
values.put(KEY_DOS, "Initial: 2 - 5 mg i.V. alle 10 bis 15 Min 
 Kinder - Initial: 0,5 - 2 mg i.V. 
 bis zum Rückgang der Bronchialsekretion");
values.put(KEY_KAT, "1");
db.insert(TABLE_ANTIDOT, null, values);
}
// Upgrading database
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
// Drop older table if existed
db.execSQL("DROP TABLE IF EXISTS " + TABLE_ANTIDOT);
// Create tables again
onCreate(db);
}
public ArrayList<HashMap<String,Object>> getAllAntidots() {
ArrayList<HashMap<String,Object>> antidotList = new ArrayList<HashMap<String,Object>>();
String selectQuery = "SELECT * FROM " + TABLE_ANTIDOT + " ORDER BY " + KEY_TOX;
SQLiteDatabase db = this.getWritableDatabase();
Cursor cursor = db.rawQuery(selectQuery, null);
HashMap<String , Object> antidot;
if (cursor.moveToFirst()) {
do {
antidot = new HashMap<String, Object>();
antidot.put("sql_id", Integer.parseInt(cursor.getString(0)));
antidot.put("toxin", cursor.getString(1));
antidot.put("antidot", cursor.getString(2));
antidotList.add(antidot);
} while (cursor.moveToNext());
}
return antidotList;
}
}
antidotlist_layout.xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
style="@style/mainView"
android:orientation="vertical" >
<EditText android:id="@+id/EditText01"
android:layout_height="wrap_content"
android:layout_width="fill_parent"
android:hint="Suchen">
</EditText>
<ListView
android:id="@android:id/list"
style="@style/mainView"
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
</ListView>
</LinearLayout>
antidotlistitem_layout.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
style="@style/mainView"
android:padding="5dip">
<!-- SQLite row id / hidden by default -->
<TextView android:id="@+id/sqlite_id"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<!-- android:visibility="gone" -->
<!-- web site title -->
<TextView
android:id="@+id/tox_layout"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:paddingTop="8dip"
android:paddingLeft="8dip"
android:paddingBottom="4dip"
android:textSize="18dip"
android:textColor="#1a1a1a" />
<!-- web site url -->
<TextView android:id="@+id/antidot_layout"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:paddingLeft="8dip"
android:paddingBottom="6dip"
android:textSize="15dip"
android:textColor="#c00300"
android:layout_below="@id/tox_layout"/>
</RelativeLayout>
I uploaded the files as eclipse workspace: http://www.file-upload.net/download-4447258/test.rar.html
回答1:
Are you sure this line works?:
if(searchString.equalsIgnoreCase(toxinname.substring(0,textLength))){
Maybe try this instead:
if(toxiname.toUpperCase().indexOf(searchString.toUpperCase()) != -1)
回答2:
I found the problem. In the Activity the last three viewHolder worked with antidots and not with antidotsResult
Wrong:
viewHolder.sqlite_id.setText(antidots.get(position).get("sql_id").toString());
viewHolder.tox_layout.setText(antidots.get(position).get("toxin").toString());
viewHolder.antidot_layout.setText(antidots.get(position).get("antidot").toString());
Works:
viewHolder.sqlite_id.setText(antidotsResult.get(position).get("sql_id").toString());
viewHolder.tox_layout.setText(antidotsResult.get(position).get("toxin").toString());
viewHolder.antidot_layout.setText(antidotsResult.get(position).get("antidot").toString());
来源：https://stackoverflow.com/questions/11040117/searchbox-in-listview-always-the-same-result