Android SQLite SELECT語句未執行
[英]Android SQLite SELECT statement not executing
問題描述
我正在建立一個SQLite數據庫來管理Android設備上的訂單，訂單項和客戶數據。 我已經在DataAdapter.java中將SQLHelpOpen幫助程序作為私有類實現了DataHelper，並且能夠將數據插入數據庫中。
但是，當我select _id, order_id, retailer, qty from the_order運行一個簡單的select _id, order_id, retailer, qty from the_order ，代碼將拋出異常。 當我查看最后一個SQL語句時，似乎未執行select 。
這是DataAdapter.java的代碼， getAllOrders方法具有select語句。
package com.orderdelivery;
import java.util.ArrayList;
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.SQLiteOpenHelper;
import android.util.Log;
public class DataAdapter {
private DataHelper dHelper;
private Context context;
private SQLiteDatabase db;
public static final String ORDER_TABLE_NAME ="the_order";
public static final String ITEM_TABLE_NAME="item";
public static final String CUSTOMER_TABLE_NAME="customer";
public static final String CUSTOMER_KEY_ID="_id";
public static final String CUSTOMER_KEY_ORDER_ID = "order_id";
public static final String CUSTOMER_KEY_NAME = "name";
public static final String CUSTOMER_KEY_ADDRESS = "address";
public static final String CUSTOMER_KEY_COUNTRY = "country";
public static final String CUSTOMER_KEY_ZIPCODE = "zip_code";
public static final String CUSTOMER_KEY_CITY = "city";
public static final String CUSTOMER_KEY_HOMEPHONE = "home_phone";
public static final String CUSTOMER_KEY_CELLPHONE = "cell_phone";
public static final String ITEM_KEY_NAME="name";
public static final String ITEM_KEY_ID="item_id";
public static final String ITEM_KEY_ORDER_ID="order_id";
public static final String ITEM_KEY_DESCRIPTION="description";
public static final String ITEM_KEY_QTY="qty";
public static final String ITEM_KEY_BRAND="brand";
public static final String ITEM_KEY_CURRENTQTY="current_qty";
public static final String ITEM_KEY_ITEM_ID_INC="_id";
public static final String ITEM_KEY_PRICE="price";
public static final String ITEM_KEY_BARCODE="barcode";
public static final String ORDER_KEY_ORDER_ID = "order_id";
public static final String ORDER_KEY_ORDER_IDSQLITE="_id";
public static final String ORDER_KEY_STATUS="status";
public static final String ORDER_KEY_CONFIRMATIONCODE="confirmation_code";
public static final String ORDER_KEY_HOUR = "hour";
public static final String ORDER_KEY_MINUTE="minute";
public static final String ORDER_KEY_RETAILER="retailer_name";
public static final String ORDER_KEY_RETAILERADDRESS="retailer_address";
public static final String ORDER_KEY_QTY="qty";
private static final String DATABASE_NAME = "orderdata.db";
private static final int DATABASE_VERSION =1;
private static final String ORDER_TABLE_CREATE = "create table the_order(order_id text not null, qty integer not null,"
+ " status text not null, confirmation_code text not null, hour integer not null,"
+ " minute integer not null, retailer_name text not null, retailer_address text not null, _id integer primary key autoincrement, unique(order_id));";
private static final String CUSTOMER_TABLE_CREATE= "create table customer(order_id text not null, name text not null, "
+"address text not null, country text not null,city text not null,zip_code text not null, "
+"home_phone text not null, cell_phone text not null, _id integer primary key autoincrement, foreign key(order_id) references the_order(order_id));";
private static final String ITEMS_TABLE_CREATE="create table item(order_id text not null, name text not null, "
+"description text not null, qty integer not null, brand text not null, current_qty integer not null, price real not null, "
+"item_id integer not null , barcode text, _id integer primary key autoincrement, foreign key(order_id) references the_order(order_id));";
public DataAdapter(Context context) {
this.context = context;
}
public DataAdapter open() throws SQLException{
//For testing
// db.delete(this.ORDER_TABLE_NAME, null, null);
// db.delete(this.ITEM_TABLE_NAME, null, null);
// db.delete(this.CUSTOMER_TABLE_NAME, null, null);
//Actual code
dHelper = new DataHelper(context);
db = dHelper.getWritableDatabase();
boolean test = db.isOpen();
test = db.isReadOnly();
test = db.isDbLockedByCurrentThread();
return this;
}
public void close(){
dHelper.close();
db.close();
}
public long addOrder(String id, String status, String confirmationCode, int hour, int minute, String retailer, String retailerAddress, int qty){
ContentValues values = new ContentValues();
values.put(this.ORDER_KEY_ORDER_ID, id);
values.put(this.ORDER_KEY_STATUS,status);
values.put(this.ORDER_KEY_CONFIRMATIONCODE,confirmationCode);
values.put(this.ORDER_KEY_HOUR, hour);
values.put(this.ORDER_KEY_MINUTE,minute);
values.put(this.ORDER_KEY_RETAILER, retailer);
values.put(this.ORDER_KEY_RETAILERADDRESS,retailerAddress);
values.put(this.ORDER_KEY_QTY,qty);
return db.insert(this.ORDER_TABLE_NAME, null, values);
}
public long addItem(String id, String name, String orderId, String description, int qty, String brand, int currentQty ,double price, String barcode){
ContentValues values = new ContentValues();
values.put(this.ITEM_KEY_NAME, name);
values.put(this.ITEM_KEY_ORDER_ID, orderId);
values.put(this.ITEM_KEY_DESCRIPTION, description);
values.put(this.ITEM_KEY_QTY, qty);
values.put(this.ITEM_KEY_BRAND, brand);
values.put(this.ITEM_KEY_CURRENTQTY, currentQty);
values.put(this.ITEM_KEY_PRICE, price);
values.put(this.ITEM_KEY_ID, id);
values.put(this.ITEM_KEY_BARCODE, barcode);
return db.insert(this.ITEM_TABLE_NAME, null, values);
}
public long addCustomer(String orderId, String name,String address, String country, String city ,String zipCode, String homePhone, String cellPhone){
ContentValues values = new ContentValues();
values.put(this.CUSTOMER_KEY_ORDER_ID, orderId);
values.put(this.CUSTOMER_KEY_NAME, name);
values.put(this.CUSTOMER_KEY_ADDRESS, address);
values.put(this.CUSTOMER_KEY_COUNTRY, country);
values.put(this.CUSTOMER_KEY_CITY, city);
values.put(this.CUSTOMER_KEY_ZIPCODE, zipCode);
values.put(this.CUSTOMER_KEY_HOMEPHONE,homePhone);
values.put(this.CUSTOMER_KEY_CELLPHONE,cellPhone);
return db.insert(this.CUSTOMER_TABLE_NAME, null, values);
}
public int changeOrderStatus(String orderId, String status){
ContentValues values = new ContentValues();
values.put(ORDER_KEY_STATUS, status);
return db.update(ORDER_TABLE_NAME, values, this.ORDER_KEY_ORDER_ID+"=?", new String[]{orderId});
}
public int changeItemCurrentQty(String orderId, String itemId, int currentQty){
ContentValues values = new ContentValues();
values.put(this.ITEM_KEY_CURRENTQTY, currentQty);
return db.update(ITEM_TABLE_NAME, values, this.ITEM_KEY_ORDER_ID+"="+orderId+" and "+this.ITEM_KEY_ID+"="+itemId, null);
}
public int changeItemTotalQuantity(String orderId, String itemId, int qty){
ContentValues values = new ContentValues();
values.put(this.ITEM_KEY_QTY, qty);
return db.update(this.ITEM_KEY_QTY,values,this.ITEM_KEY_ORDER_ID+"="+orderId+" and "+this.ITEM_KEY_ID+"="+itemId,null);
}
public Cursor getAllOrders(){
// Cursor cursor = db.query(this.ORDER_TABLE_NAME,
// new String[]{this.ORDER_KEY_ORDER_IDSQLITE, this.ORDER_KEY_ORDER_ID, this.ORDER_KEY_RETAILER, this.ORDER_KEY_QTY, this.ORDER_KEY_STATUS },
// null,
// new String[]{},
// null,
// null,
// this.ORDER_KEY_ORDER_IDSQLITE);
String query = "select "+this.ORDER_KEY_ORDER_IDSQLITE +", "+this.ORDER_KEY_RETAILER+", "+this.ORDER_KEY_QTY+", "+this.ORDER_KEY_ORDER_ID+", "+this.ORDER_KEY_STATUS+ " from the_order;";
Cursor c = db.rawQuery(query, null);
return c;
}
public void deleteAll(){
db.delete(ORDER_TABLE_NAME, null, null);
db.delete(ITEM_TABLE_NAME, null, null);
db.delete(CUSTOMER_TABLE_NAME,null,null);
}
public Cursor getAllItems(String orderId){
Cursor c = db.query(this.ITEM_TABLE_NAME, new String[] {this.ITEM_KEY_ITEM_ID_INC, this.ITEM_KEY_NAME,this.ITEM_KEY_BRAND,this.ITEM_KEY_CURRENTQTY,this.ITEM_KEY_QTY}, this.ITEM_KEY_ORDER_ID+"=?", new String[]{orderId}, null, null, this.ITEM_KEY_ITEM_ID_INC);
return c;
}
public Cursor getItemForList(String orderId, String itemId){
Cursor c = db.query(this.ITEM_TABLE_NAME, new String[] {this.ITEM_KEY_ITEM_ID_INC,this.ITEM_KEY_NAME,this.ITEM_KEY_BRAND,this.ITEM_KEY_CURRENTQTY, this.ITEM_KEY_QTY}, this.ITEM_KEY_ORDER_ID+"=? and "+ this.ITEM_KEY_ID+" =?", new String[] {orderId,itemId}, null, null, null);
return c;
}
public ArrayList<String> getItemDetails(String orderId, String itemId){
Cursor c = db. query(this.ITEM_TABLE_NAME, new String[] {this.ITEM_KEY_ITEM_ID_INC,this.ITEM_KEY_NAME,this.ITEM_KEY_BRAND, this.ITEM_KEY_CURRENTQTY,this.ITEM_KEY_QTY,this.ITEM_KEY_PRICE,this.ITEM_KEY_DESCRIPTION}, this.ITEM_KEY_ID+" =? and "+ this.ITEM_KEY_ORDER_ID +" =?", new String[]{itemId, orderId},null,null,null);
//TODO
c.moveToFirst();
ArrayList<String> data = new ArrayList<String>();
data.add(c.getString(c.getColumnIndex(this.ITEM_KEY_NAME)));
data.add(c.getString(c.getColumnIndex(this.ITEM_KEY_BRAND)));
data.add(((Double) c.getDouble(c.getColumnIndex(this.ITEM_KEY_DESCRIPTION))).toString());
data.add(c.getString(c.getColumnIndex(this.ITEM_KEY_CURRENTQTY)));
data.add(c.getString(c.getColumnIndex(this.ITEM_KEY_QTY)));
return data;
}
public ArrayList<String> getOrderDetails(String orderId){
Cursor cursorOrder = db.query(this.ORDER_TABLE_NAME, new String[] {this.ORDER_KEY_ORDER_IDSQLITE, this.ORDER_KEY_STATUS,this.ORDER_KEY_RETAILER,this.ORDER_KEY_STATUS,this.ORDER_KEY_HOUR,thi s.ORDER_KEY_MINUTE}, this.ORDER_KEY_ORDER_ID+" =?", new String[]{orderId}, null, null, null);
Cursor cursorCustomer = db.query(this.CUSTOMER_TABLE_NAME, new String[] {this.CUSTOMER_KEY_ID, this.CUSTOMER_KEY_NAME,this.CUSTOMER_KEY_ADDRESS,this.CUSTOMER_KEY_CITY,this.CUSTOMER_KEY_C OUNTRY,this.CUSTOMER_KEY_ZIPCODE,this.CUSTOMER_KEY_CELLPHONE,this.CUSTOMER_KEY_HOMEPHONE}, this.CUSTOMER_KEY_ORDER_ID+" =?", new String[]{orderId}, null, null, null);
cursorOrder.moveToFirst();
cursorCustomer.moveToFirst();
ArrayList<String> data = new ArrayList<String>();
data.add(orderId);
data.add(cursorOrder.getString(cursorOrder.getColumnIndex(this.ORDER_KEY_STATUS)));
data.add(cursorOrder.getString(cursorOrder.getColumnIndex(this.ORDER_KEY_RETAILER)));
//concat dateHour
String date = cursorOrder.getString(cursorOrder.getColumnIndex(this.ORDER_KEY_HOUR))+":"+cursorOrder.getS tring(cursorOrder.getColumnIndex(this.ORDER_KEY_MINUTE));
data.add(cursorCustomer.getString(cursorCustomer.getColumnIndex(this.CUSTOMER_KEY_NAME)));
data.add(cursorCustomer.getString(cursorCustomer.getColumnIndex(this.CUSTOMER_KEY_ADDRESS)));
data.add(cursorCustomer.getString(cursorCustomer.getColumnIndex(this.CUSTOMER_KEY_CITY)));
data.add(cursorCustomer.getString(cursorCustomer.getColumnIndex(this.CUSTOMER_KEY_COUNTRY)) );
data.add(cursorCustomer.getString(cursorCustomer.getColumnIndex(this.CUSTOMER_KEY_ZIPCODE)));
data.add(cursorCustomer.getString(cursorCustomer.getColumnIndex(this.CUSTOMER_KEY_CELLPHONE)));
data.add(cursorCustomer.getString(cursorCustomer.getColumnIndex(this.CUSTOMER_KEY_HOMEPHONE)));
return data;
}
private class DataHelper extends SQLiteOpenHelper {
public DataHelper(Context context){
super(context,DATABASE_NAME,null,DATABASE_VERSION);
}
@Override
public void onCreate(SQLiteDatabase arg0) {
arg0.execSQL(ORDER_TABLE_CREATE);
arg0.execSQL(ITEMS_TABLE_CREATE);
arg0.execSQL(CUSTOMER_TABLE_CREATE);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
// TODO Auto-generated method stub
Log.w("Orders","Upgrading database, this will drop tables and recreate.");
//drop tables!!! TODO AS SOON AS BACK FROM LUNCH!!
db.execSQL("drop table if exists "+ITEM_TABLE_NAME);
db.execSQL("drop table if exists "+ORDER_TABLE_CREATE);
db.execSQL("drop table if exists "+CUSTOMER_TABLE_NAME);
}
}
}
這是OrderList.Java，在其中我在OnCreate上調用getAllOrders方法：
package com.orderdelivery;
import java.util.ArrayList;
import android.app.Activity;
import android.app.ListActivity;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.CursorAdapter;
import android.widget.ListView;
import android.widget.SimpleCursorAdapter;
import android.widget.TextView;
import com.orderdelivery.DataAdapter;
public class OrderList extends ListActivity {
ArrayList<Order> orders;
OrderListAdapter oAdapter;
SimpleOrderAdapter oCursorAdapter;
static Order active = null;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
ListView list = getListView();
// list.setAdapter(oCursorAdapter);
list.setOnItemClickListener(new OnItemClickListener(){
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
startActivity(new Intent("com.orderdelivery.GROCERYITEMLIST"));
// TODO Auto-generated method stub
}
});
// orders = new ArrayList<Order>();
//
// for(int i =0; i<5;i++){
// orders.add(new Order("19995","Pueblo, Maya",i,"Pending", null, null, null)); //Customer, items, confirmation...
// }
//
// oAdapter = new OrderListAdapter(this,R.layout.row,orders);
// list.setAdapter(oAdapter);
//
DataAdapter dbAdapter = new DataAdapter(this);
dbAdapter.open();
dbAdapter.deleteAll();
dbAdapter.addOrder("1995", "Pending", "100101", 12, 31, "Pueblo,Xtra", "Mayaguez" , 1);
dbAdapter.addCustomer("1995", "Robert Soler", "Urb. Villa Mofongo II3", "PR", "Mayaguez", "00617", "787-391-5555", "787-391-5555");
dbAdapter.addItem("0101", "Habichuelas Blancas", "1995", "Si es GOYA tiene que ser bueno", 1, "Goya", 0, 2.75, "1001019");
Cursor oCursor = dbAdapter.getAllOrders();
oCursorAdapter = new SimpleOrderAdapter(this,R.layout.row,oCursor,null,null);
list.setAdapter(oCursorAdapter);
}
public static Order getCurrentActiveOrder()
{
return active;
}
public void setCurrentActiveOrder(Order o){
active = o;
}
private class OrderListAdapter extends ArrayAdapter<Order> {
private ArrayList<Order> orders;
private OrderListAdapter(Context context, int textViewResourceId, ArrayList<Order> orders)
{
super(context, textViewResourceId, orders);
this.orders = orders;
}
@Override
public View getView(int position, View convertView, ViewGroup parent)
{
View v = convertView;
if (v==null)
{
LayoutInflater vi = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
v = vi.inflate(R.layout.row, null);
}
Order o = orders.get(position);
if(o!=null){
TextView orderNum = (TextView) v.findViewById(R.id.orderNumber);
TextView location = (TextView) v.findViewById(R.id.location);
TextView quantity = (TextView) v.findViewById(R.id.quantity);
TextView status = (TextView) v.findViewById(R.id.status);
if(orderNum!=null){
orderNum.setText("Order " + o.getOrderNumber());
}
if(location!=null)
{
location.setText("Location: "+o.getOrderRetailer());
}
if(quantity!=null){
quantity.setText("Qty: "+o.getTotalQuantity());
}
if(status!=null){
status.setText("Status: "+ o.getStatus());
}
}
return v;
}
}
@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
// TODO Auto-generated method stub
super.onListItemClick(l, v, position, id);
Intent intent = new Intent("com.orderdelivery.GROCERYITEMLIST");
Bundle bundle = new Bundle();
bundle.putInt("position", position);
}
//Might be needed
public static Order getOrderAtPosition(int pos){
return null;
}
private class SimpleOrderAdapter extends SimpleCursorAdapter {
private LayoutInflater inflater;
public SimpleOrderAdapter(Context context, int layout, Cursor c,
String[] from, int[] to) {
super(context, layout, c, from, to);
// TODO Auto-generated constructor stub
}
@Override
public void bindView(View v, Context context, Cursor c) {
// TODO Auto-generated method stub
super.bindView(v, context, c);
TextView orderNum = (TextView) v.findViewById(R.id.orderNumber);
TextView location = (TextView) v.findViewById(R.id.location);
TextView quantity = (TextView) v.findViewById(R.id.quantity);
TextView status = (TextView) v.findViewById(R.id.status);
String orderNumString="Order "+ c.getString(c.getColumnIndex(DataAdapter.ORDER_KEY_ORDER_ID));
String locationString=c.getString(c.getColumnIndex(DataAdapter.ORDER_KEY_RETAILER));
int qty = c.getInt(c.getColumnIndex(DataAdapter.ORDER_KEY_QTY));
String statusString = c.getString(c.getColumnIndex(DataAdapter.ORDER_KEY_STATUS));
orderNum.setText(orderNumString);
location.setText(locationString);
quantity.setText(""+qty); //FIXXX
status.setText(statusString);
}
@Override
public View newView(Context context, Cursor c, ViewGroup parent) {
// TODO Auto-generated method stub
final LayoutInflater inflater = LayoutInflater.from(context);
View v = inflater.inflate(R.layout.row, parent, false);
TextView orderNum = (TextView) v.findViewById(R.id.orderNumber);
TextView location = (TextView) v.findViewById(R.id.location);
TextView quantity = (TextView) v.findViewById(R.id.quantity);
TextView status = (TextView) v.findViewById(R.id.status);
String orderNumString="Order "+ c.getString(c.getColumnIndex(DataAdapter.ORDER_KEY_ORDER_ID));
String locationString="Location: "+c.getString(c.getColumnIndex(DataAdapter.ORDER_KEY_RETAILER));
String qtyString ="Qty: "+ c.getString(c.getColumnIndex(DataAdapter.ORDER_KEY_QTY));
String statusString = c.getString(c.getColumnIndex(DataAdapter.ORDER_KEY_STATUS));
orderNum.setText(orderNumString);
location.setText(locationString);
quantity.setText(qtyString);
status.setText(statusString);
return v;
}
}
}
這是我在該網站上的第一篇文章，非常感謝可以幫助您的人:)
'編輯'這是logcat文件的輸出：
D/AndroidRuntime( 7415): CheckJNI is ON
D/AndroidRuntime( 7415): --- registering native functions ---
I/ActivityManager( 58): Starting activity: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10000000 cmp=com.orderdelivery/.OrderList }
I/ActivityManager( 58): Start proc com.orderdelivery for activity com.orderdelivery/.OrderList: pid=7421 uid=10033 gids={1015}
D/AndroidRuntime( 7415): Shutting down VM
I/AndroidRuntime( 7415): NOTE: attach of thread 'Binder Thread #3' failed
D/dalvikvm( 7415): Debugger has detached; object registry had 1 entries
I/ARMAssembler( 58): generated scanline__00000077:03545404_00000004_00000000 [ 47 ipp] (67 ins) at [0x2ec420:0x2ec52c] in 1155044 ns
D/AndroidRuntime( 7421): Shutting down VM
W/dalvikvm( 7421): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
E/AndroidRuntime( 7421): FATAL EXCEPTION: main
E/AndroidRuntime( 7421): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.orderdelivery/com.orderdelivery.OrderList}: java.lang.NullPointerException
E/AndroidRuntime( 7421): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
E/AndroidRuntime( 7421): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
E/AndroidRuntime( 7421): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
E/AndroidRuntime( 7421): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
E/AndroidRuntime( 7421): at android.os.Handler.dispatchMessage(Handler.java:99)
E/AndroidRuntime( 7421): at android.os.Looper.loop(Looper.java:123)
E/AndroidRuntime( 7421): at android.app.ActivityThread.main(ActivityThread.java:4627)
E/AndroidRuntime( 7421): at java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime( 7421): at java.lang.reflect.Method.invoke(Method.java:521)
E/AndroidRuntime( 7421): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
E/AndroidRuntime( 7421): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
E/AndroidRuntime( 7421): at dalvik.system.NativeStart.main(Native Method)
E/AndroidRuntime( 7421): Caused by: java.lang.NullPointerException
E/AndroidRuntime( 7421): at android.widget.SimpleCursorAdapter.findColumns(SimpleCursorAdapter.java:307)
E/AndroidRuntime( 7421): at android.widget.SimpleCursorAdapter.<init> (SimpleCursorAdapter.java:87)
E/AndroidRuntime( 7421): at com.orderdelivery.OrderList$SimpleOrderAdapter.<init> (OrderList.java:171)
E/AndroidRuntime( 7421): at com.orderdelivery.OrderList.onCreate(OrderList.java:74)
E/AndroidRuntime( 7421): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
E/AndroidRuntime( 7421): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
E/AndroidRuntime( 7421): ... 11 more
W/ActivityManager( 58): Force finishing activity com.orderdelivery/.OrderList
W/ActivityManager( 58): Activity pause timeout for HistoryRecord{43f91798 com.orderdelivery/.OrderList}
I/ARMAssembler( 58): generated scanline__00000077:03515104_00000000_00000000 [ 33 ipp] (47 ins) at [0x329870:0x32992c] in 2032590 ns
D/AndroidRuntime( 7435):
1 個解決方案
解決方案1
1 已采納 2011-04-07 07:09:53
您的SimpleOrderAdapter子類化SimpleCursorAdapter 。 您可以使用游標（查詢的結果）以及from和to null值來創建它。 根據javadoc，這僅在游標尚不可用時才允許。
我看到，在創建新的SimpleOrderAdapter實例期間，應用程序在查詢后崩潰。 在我看來，您必須使用實際值（列名和文本視圖的索引/ ID）創建此適配器。
如何在Android平台上的SQLite中創建准備好的SELECT語句
[英]How to create a prepared SELECT statement in SQLite on Android platform
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