无法在android的搜索视图中检索数据
我正在尝试从SQLite数据库到无法在android的搜索视图中检索数据,android,sqlite,Android,Sqlite,我正在尝试从SQLite数据库到SearchView进行简单的数据检索 我的问题是，SearchView没有针对存储在数据库中的数据进行填充，尽管它始终显示 已成功创建数据库 下面是代码 fragment\u search.xml <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
SearchView <?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="fill_parent"
android:background="#E6E6E6"
android:orientation="vertical" >
<View
android:id="@+id/view1"
android:layout_width="match_parent"
android:layout_height="45dp"
android:layout_alignParentTop="true"
android:layout_marginLeft="5dp"
android:layout_marginRight="5dp"
android:layout_marginTop="5dp"
android:background="#FFFFFF" />
<SearchView
android:id="@+id/searchView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:layout_marginTop="3dp" >
</SearchView>
<ListView
android:id="@+id/listview_search"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="@+id/searchView"
android:layout_centerHorizontal="true"
android:divider="#E6E6E6"
android:dividerHeight="5dp" />
<LinearLayout
android:id="@+id/rightLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignBottom="@+id/view1"
android:layout_alignTop="@+id/view1"
android:orientation="vertical"
android:paddingTop="25dp" >
</LinearLayout>
</RelativeLayout>
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<LinearLayout
android:id="@+id/hotelLayout"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<TableRow
android:id="@+id/section_search"
android:layout_width="wrap_content"
android:layout_height="match_parent" >
<GridLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:columnCount="2" >
<ImageView
android:id="@+id/hotel_image"
android:layout_width="100dp"
android:layout_height="100dp"
android:layout_gravity="left"
android:src="@drawable/aaa" />
<EditText
android:id="@+id/hotel_name"
android:layout_width="209dp"
android:layout_height="56dp"
android:layout_gravity="fill_horizontal" >
<requestFocus />
</EditText>
<EditText
android:id="@+id/hotel_city"
android:layout_width="96dp"
android:layout_column="1"
android:layout_gravity="left|bottom"
android:layout_row="0"
android:ems="10" />
<EditText
android:id="@+id/hotel_country"
android:layout_width="106dp"
android:layout_column="1"
android:layout_gravity="right|bottom"
android:layout_row="0"
android:ems="10" />
</GridLayout>
</TableRow>
</LinearLayout>
</RelativeLayout>
package com.mytry.test;
import android.provider.BaseColumns;
public class TableData
{
public TableData()
{
}
public static abstract class TableInfo implements BaseColumns
{
public static final String DATABASE_NAME = "tourDguide";
public static final String TABLE_NAME = "Hotels";
public static final String HOTEL_ID = "id";
public static final String HOTEL_NAME = "hotel_name";
public static final String HOTEL_ADDRESS = "hotel_address";
public static final String HOTEL_CITY = "hotel_city";
public static final String HOTEL_COUNTRY = "hotel_country";
public static final String HOTEL_POSTAL = "postal_code";
}
}
package com.mytry.test;
import android.content.Context;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteDatabase.CursorFactory;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;
import com.mytry.test.TableData.TableInfo;
public class DataHandler
{
public static final int DATABASE_VERSION = 1;
SQLiteDatabase db;
DataBaseHelper dbhelper;
Context ctx;
private static class DataBaseHelper extends SQLiteOpenHelper
{
public String CREATE_QUERY = "CREATE TABLE "+TableInfo.TABLE_NAME+"("+TableInfo.HOTEL_ID+" INTEGER PRIMARY KEY AUTOINCREMENT,"+TableInfo.HOTEL_NAME+" VARCHAR,"+TableInfo.HOTEL_ADDRESS+" VARCHAR,"+TableInfo.HOTEL_CITY+" VARCHAR,"+TableInfo.HOTEL_COUNTRY+" VARCHAR,"+TableInfo.HOTEL_POSTAL+" INT );";
public DataBaseHelper(Context ctx) {
super(ctx,TableInfo.DATABASE_NAME, null, DATABASE_VERSION);
Log.d("Database Operations", "Successfully Created Database");
// TODO Auto-generated constructor stub
}
@Override
public void onCreate(SQLiteDatabase db) {
// TODO Auto-generated method stub
try{
db.execSQL(CREATE_QUERY);
Log.d("Database Operations", "Successfully Created Table");
}
catch(SQLException e)
{
e.printStackTrace();
}
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
db.execSQL("Drop table if exists "+TableInfo.TABLE_NAME);
onCreate(db);
}
}
public DataHandler(Context ctx) {
this.ctx = ctx;
dbhelper = new DataBaseHelper(ctx);
// TODO Auto-generated constructor stub
}
public DataHandler open()
{
dbhelper = new DataBaseHelper(ctx);
db = dbhelper.getReadableDatabase();
return this;
}
public void close()
{
dbhelper.close();
}
public Cursor searchHotels(String inputText) throws SQLException
{
String query = "Select "+TableInfo.HOTEL_ID+" as _id,"+TableInfo.HOTEL_NAME+","+TableInfo.HOTEL_ADDRESS+","+TableInfo.HOTEL_CITY+","+TableInfo.HOTEL_COUNTRY+","+TableInfo.HOTEL_POSTAL+" from "+TableInfo.TABLE_NAME+" where "+TableInfo.HOTEL_NAME+" LIKE '" + inputText + "';";
Log.d("table operations","Successfully transferred query");
Cursor cr = db.rawQuery(query, null);
if(cr!=null)
{
cr.moveToFirst();
}
return cr;
}
}
package com.mytry.test;
import com.mytry.test.TableData.TableInfo;
import android.R.anim;
import android.app.Activity;
import android.app.DownloadManager.Query;
import android.content.Context;
import android.database.Cursor;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.SearchView;
import android.widget.SimpleAdapter;
import android.widget.SimpleCursorAdapter;
import android.widget.TextView;
import android.widget.AdapterView.OnItemClickListener;
public class SearchViewActivity extends Activity implements SearchView.OnQueryTextListener,SearchView.OnCloseListener
{
private ListView list;
private SearchView search;
private DataHandler dbHandler;
private TextView name,city,country;
private EditText edit;
Context ctx=this;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.fragment_search);
search = (SearchView) this.findViewById(R.id.searchView);
list = (ListView) this.findViewById(R.id.listview_search);
name = (TextView)this.findViewById(R.id.hotel_name);
city = (TextView)this.findViewById(R.id.hotel_city);
country = (TextView)this.findViewById(R.id.hotel_country);
search.setIconifiedByDefault(false);
search.setOnQueryTextListener(this);
search.setOnCloseListener(this);
dbHandler = new DataHandler(getBaseContext());
dbHandler.open();
}
public boolean onQueryTextSubmit(String query)
{
showResults(query + "*");
return false;
}
public boolean onQueryTextChange(String newText)
{
showResults(newText + "*");
return false;
}
public boolean onClose()
{
showResults("");
return false;
}
private void showResults(String query)
{
Cursor cr = dbHandler.searchHotels((query!=null?query.toString(): "@@@@"));
if(cr==null)
{
}
else
{
String[] from = new String[]
{TableInfo.HOTEL_NAME,TableInfo.HOTEL_ADDRESS,TableInfo.HOTEL_CITY,TableInfo.HOTEL_COUNTRY,TableInfo.HOTEL_POSTAL};
int[] to = new int[]{R.id.hotel_name,R.id.hotel_city,R.id.hotel_country};
SimpleCursorAdapter hotels = new SimpleCursorAdapter(this,R.layout.search_list, cr, from, to);
list.setAdapter(hotels);
list.setOnItemClickListener(new OnItemClickListener()
{
public void onItemClick(AdapterView<?> parent, View view, int position, long id)
{
Cursor cr = (Cursor)list.getItemAtPosition(position);
String hotel_name = cr.getString(cr.getColumnIndexOrThrow("hotel_name"));
String hotel_city = cr.getString(cr.getColumnIndexOrThrow("hotel_city"));
String hotel_country = cr.getString(cr.getColumnIndexOrThrow("hotel_country"));
LinearLayout hotelLayout = (LinearLayout)findViewById(R.id.hotelLayout);
if(hotelLayout == null){
//Inflate the Customer Information View
LinearLayout leftLayout = (LinearLayout)findViewById(R.id.rightLayout);
View hotelInfo = getLayoutInflater().inflate(R.layout.search_list, leftLayout, false);
leftLayout.addView(hotelInfo);
}
name.setText(hotel_name);
city.setText(hotel_city);
country.setText(hotel_country);
search.setQuery("", true);
}
});
}
}
}
package com.mytry.test;
import android.provider.BaseColumns;
public class TableData
{
public TableData()
{
}
public static abstract class TableInfo implements BaseColumns
{
public static final String DATABASE_NAME = "tourDguide";
public static final String TABLE_NAME = "Hotels";
public static final String HOTEL_ID = "id";
public static final String HOTEL_NAME = "hotel_name";
public static final String HOTEL_ADDRESS = "hotel_address";
public static final String HOTEL_CITY = "hotel_city";
public static final String HOTEL_COUNTRY = "hotel_country";
public static final String HOTEL_POSTAL = "postal_code";
}
}
package com.mytry.test;
import android.content.Context;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteDatabase.CursorFactory;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;
import com.mytry.test.TableData.TableInfo;
public class DataHandler
{
public static final int DATABASE_VERSION = 1;
SQLiteDatabase db;
DataBaseHelper dbhelper;
Context ctx;
private static class DataBaseHelper extends SQLiteOpenHelper
{
public String CREATE_QUERY = "CREATE TABLE "+TableInfo.TABLE_NAME+"("+TableInfo.HOTEL_ID+" INTEGER PRIMARY KEY AUTOINCREMENT,"+TableInfo.HOTEL_NAME+" VARCHAR,"+TableInfo.HOTEL_ADDRESS+" VARCHAR,"+TableInfo.HOTEL_CITY+" VARCHAR,"+TableInfo.HOTEL_COUNTRY+" VARCHAR,"+TableInfo.HOTEL_POSTAL+" INT );";
public DataBaseHelper(Context ctx) {
super(ctx,TableInfo.DATABASE_NAME, null, DATABASE_VERSION);
Log.d("Database Operations", "Successfully Created Database");
// TODO Auto-generated constructor stub
}
@Override
public void onCreate(SQLiteDatabase db) {
// TODO Auto-generated method stub
try{
db.execSQL(CREATE_QUERY);
Log.d("Database Operations", "Successfully Created Table");
}
catch(SQLException e)
{
e.printStackTrace();
}
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
db.execSQL("Drop table if exists "+TableInfo.TABLE_NAME);
onCreate(db);
}
}
public DataHandler(Context ctx) {
this.ctx = ctx;
dbhelper = new DataBaseHelper(ctx);
// TODO Auto-generated constructor stub
}
public DataHandler open()
{
dbhelper = new DataBaseHelper(ctx);
db = dbhelper.getReadableDatabase();
return this;
}
public void close()
{
dbhelper.close();
}
public Cursor searchHotels(String inputText) throws SQLException
{
String query = "Select "+TableInfo.HOTEL_ID+" as _id,"+TableInfo.HOTEL_NAME+","+TableInfo.HOTEL_ADDRESS+","+TableInfo.HOTEL_CITY+","+TableInfo.HOTEL_COUNTRY+","+TableInfo.HOTEL_POSTAL+" from "+TableInfo.TABLE_NAME+" where "+TableInfo.HOTEL_NAME+" LIKE '" + inputText + "';";
Log.d("table operations","Successfully transferred query");
Cursor cr = db.rawQuery(query, null);
if(cr!=null)
{
cr.moveToFirst();
}
return cr;
}
}
package com.mytry.test;
import com.mytry.test.TableData.TableInfo;
import android.R.anim;
import android.app.Activity;
import android.app.DownloadManager.Query;
import android.content.Context;
import android.database.Cursor;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.SearchView;
import android.widget.SimpleAdapter;
import android.widget.SimpleCursorAdapter;
import android.widget.TextView;
import android.widget.AdapterView.OnItemClickListener;
public class SearchViewActivity extends Activity implements SearchView.OnQueryTextListener,SearchView.OnCloseListener
{
private ListView list;
private SearchView search;
private DataHandler dbHandler;
private TextView name,city,country;
private EditText edit;
Context ctx=this;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.fragment_search);
search = (SearchView) this.findViewById(R.id.searchView);
list = (ListView) this.findViewById(R.id.listview_search);
name = (TextView)this.findViewById(R.id.hotel_name);
city = (TextView)this.findViewById(R.id.hotel_city);
country = (TextView)this.findViewById(R.id.hotel_country);
search.setIconifiedByDefault(false);
search.setOnQueryTextListener(this);
search.setOnCloseListener(this);
dbHandler = new DataHandler(getBaseContext());
dbHandler.open();
}
public boolean onQueryTextSubmit(String query)
{
showResults(query + "*");
return false;
}
public boolean onQueryTextChange(String newText)
{
showResults(newText + "*");
return false;
}
public boolean onClose()
{
showResults("");
return false;
}
private void showResults(String query)
{
Cursor cr = dbHandler.searchHotels((query!=null?query.toString(): "@@@@"));
if(cr==null)
{
}
else
{
String[] from = new String[]
{TableInfo.HOTEL_NAME,TableInfo.HOTEL_ADDRESS,TableInfo.HOTEL_CITY,TableInfo.HOTEL_COUNTRY,TableInfo.HOTEL_POSTAL};
int[] to = new int[]{R.id.hotel_name,R.id.hotel_city,R.id.hotel_country};
SimpleCursorAdapter hotels = new SimpleCursorAdapter(this,R.layout.search_list, cr, from, to);
list.setAdapter(hotels);
list.setOnItemClickListener(new OnItemClickListener()
{
public void onItemClick(AdapterView<?> parent, View view, int position, long id)
{
Cursor cr = (Cursor)list.getItemAtPosition(position);
String hotel_name = cr.getString(cr.getColumnIndexOrThrow("hotel_name"));
String hotel_city = cr.getString(cr.getColumnIndexOrThrow("hotel_city"));
String hotel_country = cr.getString(cr.getColumnIndexOrThrow("hotel_country"));
LinearLayout hotelLayout = (LinearLayout)findViewById(R.id.hotelLayout);
if(hotelLayout == null){
//Inflate the Customer Information View
LinearLayout leftLayout = (LinearLayout)findViewById(R.id.rightLayout);
View hotelInfo = getLayoutInflater().inflate(R.layout.search_list, leftLayout, false);
leftLayout.addView(hotelInfo);
}
name.setText(hotel_name);
city.setText(hotel_city);
country.setText(hotel_country);
search.setQuery("", true);
}
});
}
}
}
package com.mytry.test；
导入com.mytry.test.TableData.TableInfo；
导入android.R.anim；
导入android.app.Activity；
导入android.app.DownloadManager.Query；
导入android.content.Context；
导入android.database.Cursor；
导入android.os.Bundle；
导入android.view.view；
导入android.widget.AdapterView；
导入android.widget.EditText；
导入android.widget.LinearLayout；
导入android.widget.ListView；
导入android.widget.SearchView；
导入android.widget.simpledapter；
导入android.widget.SimpleCursorAdapter；
导入android.widget.TextView；
导入android.widget.AdapterView.OnItemClickListener；
公共类SearchViewActivity扩展活动实现SearchView.OnQueryTextListener、SearchView.OnCloseListener
{
私有列表视图列表；
私有搜索视图搜索；
私有数据处理程序dbHandler；
私有文本视图名称、城市、国家；
私人编辑文本编辑；
上下文ctx=此；
创建时的公共void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
setContentView（R.layout.fragment_search）；
search=（SearchView）this.findviewbyd（R.id.SearchView）；
list=（ListView）this.findViewById（R.id.ListView\u search）；
name=（TextView）this.findviewbyd（R.id.hotel\u name）；
城市=（TextView）this.findviewbyd（R.id.hotel\u city）；
country=（TextView）this.findviewbyd（R.id.hotel\u country）；
search.setIconifiedByDefault（false）；
search.setOnQueryTextListener（这个）；
search.setOnCloseListener（this）；
dbHandler=newdatahandler（getBaseContext（））；
dbHandler.open（）；
}
公共布尔值onQueryTextSubmit（字符串查询）
{
显示结果（查询+“*”）；
返回false；
}
公共布尔onQueryTextChange（字符串newText）
{
显示结果（新文本+“*”）；
返回false；
}
公共布尔onClose（）
{
展示结果（“”）；
返回false；
}
私有void显示结果（字符串查询）
{
游标cr=dbHandler.searchHotels（（query！=null？query.toString（）：“@@@”）；
if（cr==null）
{
}
其他的
{
String[]from=新字符串[]
{TableInfo.HOTEL\u NAME，TableInfo.HOTEL\u ADDRESS，TableInfo.HOTEL\u CITY，TableInfo.HOTEL\u COUNTRY，TableInfo.HOTEL\u POSTAL}；
int[]to=新int[]{R.id.hotel\u name，R.id.hotel\u city，R.id.hotel\u country}；
SimpleCursorAdapter hotels=新的SimpleCursorAdapter（this，R.layout.search_list，cr，from，to）；
名单.酒店;；
list.setOnItemClickListener（新的OnItemClickListener（）
{
public void onItemClick（AdapterView父对象、视图、整型位置、长id）
{
游标cr=（游标）列表。getItemAtPosition（位置）；
String hotel_name=cr.getString（cr.getColumnIndexOrThrow（“hotel_name”）；
String hotel_city=cr.getString（cr.getColumnIndexOrThrow（“hotel_city”）；
String hotel_country=cr.getString（cr.getColumnIndexOrThrow（“hotel_country”）；
LinearLayout hotelLayout=（LinearLayout）findViewById（R.id.hotelLayout）；
if（hotelLayout==null）{
//膨胀客户信息视图
LinearLayout leftLayout=（LinearLayout）findViewById（R.id.rightLayout）；
查看hotelInfo=GetLayoutFlater（）。充气（R.layout.search_list，leftLayout，false）；
leftLayout.addView（hotelInfo）；
}
name.setText（酒店名称）；
city.setText（城市酒店）；
country.setText（国家酒店）；
search.setQuery（“，true）；
}
});
}
}
}