如果网络可用，我正在尝试更新数据。从SQLite数据库中读取数据时出现问题。 它显示 readFromLocalDatabase 方法 DbHelper1.java 中光标初始化的问题
NetworkMonitor.java
public class NetworkMonitor1 extends BroadcastReceiver {
@Override
public void onReceive(final Context context, Intent intent) {
if(checkNetworkConnection(context)){
DbHelper1.getInstance(context);
final SQLiteDatabase database = DbHelper1.getInstance(context).getWritableDatabase();
Cursor cursor=DbHelper1.getInstance(context).readFromLocalDatabase(database);
while (cursor.moveToNext()){
int sync_status = cursor.getInt(cursor.getColumnIndex(DbContact.SYNC_STATUS_1));
if(sync_status == DbContact.SYNC_STATUS_FAILED_1){
final String Vehicle = cursor.getString(cursor.getColumnIndex(DbContact.VEHICLE_NO));
final String Exp_Date = cursor.getString(cursor.getColumnIndex(DbContact.EXP_DATE));
final String Society_Name = cursor.getString(cursor.getColumnIndex(DbContact.SOCIETY_NAME));
final String Spl_Qty = cursor.getString(cursor.getColumnIndex(DbContact.SPL_QTY));
final String Transport_Name = cursor.getString(cursor.getColumnIndex(DbContact.TRANSPORT_NAME));
final String Transport_Vehicle_No = cursor.getString(cursor.getColumnIndex(DbContact.TRANSPORT_VEHICLE_NO));
final String Hsd = cursor.getString(cursor.getColumnIndex(DbContact.HSD));
final String Toll_Tax = cursor.getString(cursor.getColumnIndex(DbContact.TOLL_TAX));
final String Food = cursor.getString(cursor.getColumnIndex(DbContact.FOOD));
final String P_Name = cursor.getString(cursor.getColumnIndex(DbContact.P_NAME));
final String P_Expenses = cursor.getString(cursor.getColumnIndex(DbContact.P_EXPENSES));
final String Reading_Open = cursor.getString(cursor.getColumnIndex(DbContact.READING_OPEN));
final String Reading_Close = cursor.getString(cursor.getColumnIndex(DbContact.READING_CLOSE));
final String Reading_Net = cursor.getString(cursor.getColumnIndex(DbContact.READING_NET));
final String Net_Amount = cursor.getString(cursor.getColumnIndex(DbContact.NET_AMOUNT));
final String Opening_Balance = cursor.getString(cursor.getColumnIndex(DbContact.OPENING_BALANCE));
final String Closing_Balance = cursor.getString(cursor.getColumnIndex(DbContact.CLOSING_BALANCE));
final String Remarks = cursor.getString(cursor.getColumnIndex(DbContact.REMARKS));
StringRequest stringRequest = new StringRequest(Request.Method.POST, DbContact.SERVER_URL_TRANSPORT,
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
try {
JSONObject jsonObject = new JSONObject(response);
String Response = jsonObject.getString("response");
if(Response.equals("OK")){
DbHelper1.getInstance(context).updateLocalDatabase(Vehicle,Exp_Date,Society_Name, Spl_Qty,
Transport_Name, Transport_Vehicle_No,Hsd,Toll_Tax,Food,P_Name,P_Expenses,Reading_Open,
Reading_Close,Reading_Net, Net_Amount,Opening_Balance,Closing_Balance,Remarks,
DbContact.SYNC_STATUS_OK_1);
context.sendBroadcast(new Intent(DbContact.UI_UPDATE_BROADCAST));
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
}
})
{
@Override
protected Map<String, String> getParams() throws AuthFailureError {
Map<String,String> params = new HashMap<>();
params.put("vehicle_no",Vehicle);
params.put("exp_date",Exp_Date);
params.put("society_name",Society_Name);
params.put("spl_qty", Spl_Qty);
params.put("transport_name", Transport_Name);
params.put("transport_vehicle_no", Transport_Vehicle_No);
params.put("hsd", Hsd);
params.put("toll_tax", Toll_Tax);
params.put("food", Food);
params.put("p_name", P_Name);
params.put("p_expenses", P_Expenses);
params.put("reading_open",Reading_Open);
params.put("reading_close", Reading_Close);
params.put("reading_net",Reading_Net);
params.put("net_amount", Net_Amount);
params.put("opening_balance", Opening_Balance);
params.put("closing_balance",Closing_Balance);
params.put("remarks", Remarks);
return params;
}
} ;
MySingleton.getInstance(context).addToRequestQueue(stringRequest);
}
}
DbHelper1.getInstance(context).close();
}
}
public boolean checkNetworkConnection(Context context){
ConnectivityManager connectivityManager =(ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo networkInfo=connectivityManager.getActiveNetworkInfo();
return (networkInfo!= null && networkInfo.isConnected());
}
}
DbHelper1.java
public class DbHelper1 extends SQLiteOpenHelper {
private static DbHelper1 sInstance;
private SQLiteDatabase jewlotDB;
//database version
private static final int DATABASE_VERSION = 3;
public static final String DATABASE_NAME = "ddagroin";
private static final String DROP_TABLE = "DROP TABLE IF EXISTS " + DbContact.TABLE_NAME_TRANSPORT;
public static synchronized DbHelper1 getInstance(Context context) {
// Use the application context, which will ensure that you
// don't accidentally leak an Activity's context
if (sInstance == null) {
sInstance = new DbHelper1(context.getApplicationContext());
}
return sInstance;
}
/**
* Constructor should be private to prevent direct instantiation.
* make call to static method "getInstance()" instead.
*/
private DbHelper1(Context context){
super(context,DATABASE_NAME,null,DATABASE_VERSION);
}
@Override
public void onCreate(SQLiteDatabase db) {
String CREATE_TABLE= "CREATE TABLE " + DbContact.TABLE_NAME_TRANSPORT
+ "(" + DbContact.COLUMN_ID +
" INTEGER PRIMARY KEY AUTOINCREMENT, "
+ DbContact.VEHICLE_NO + " VARCHAR, "
+ DbContact.EXP_DATE + " VARCHAR, "
+ DbContact.SOCIETY_NAME + " VARCHAR, "
+ DbContact.SPL_QTY + " VARCHAR, "
+ DbContact.TRANSPORT_NAME + " VARCHAR, "
+ DbContact.TRANSPORT_VEHICLE_NO + " VARCHAR, "
+ DbContact.HSD + " VARCHAR, "
+ DbContact.TOLL_TAX + " VARCHAR, "
+ DbContact.FOOD + " VARCHAR, "
+ DbContact.P_NAME + " VARCHAR, "
+ DbContact.P_EXPENSES + " VARCHAR, "
+ DbContact.READING_OPEN + " VARCHAR, "
+ DbContact.READING_CLOSE + " VARCHAR, "
+ DbContact.READING_NET + " VARCHAR, "
+ DbContact.NET_AMOUNT + " VARCHAR, "
+ DbContact.OPENING_BALANCE + " VARCHAR, "
+ DbContact.CLOSING_BALANCE + " VARCHAR, "
+ DbContact.REMARKS + " VARCHAR, "
+ DbContact.SYNC_STATUS_1 + " INTEGER);";
db.execSQL(CREATE_TABLE);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
db.execSQL(DROP_TABLE);
onCreate(db);
}
public void saveToLocalDatabase(String vehicle, String exp_date,String society_name,
String spl_qty, String transport_name, String transport_vehicle_no,
String hsd, String toll_tax, String food, String p_name,
String p_expenses, String reading_open, String reading_close,
String reading_net,String net_amount, String opening_balance,
String closing_balance, String remarks,
int sync_status, SQLiteDatabase database){
ContentValues contentValues = new ContentValues();
contentValues.put(DbContact.VEHICLE_NO, vehicle);
contentValues.put(DbContact.EXP_DATE, exp_date);
contentValues.put(DbContact.SOCIETY_NAME, society_name);
contentValues.put(DbContact.SPL_QTY, spl_qty);
contentValues.put(DbContact.TRANSPORT_NAME, transport_name);
contentValues.put(DbContact.TRANSPORT_VEHICLE_NO, transport_vehicle_no);
contentValues.put(DbContact.HSD, hsd);
contentValues.put(DbContact.TOLL_TAX, toll_tax);
contentValues.put(DbContact.FOOD, food);
contentValues.put(DbContact.P_NAME, p_name);
contentValues.put(DbContact.P_EXPENSES, p_expenses);
contentValues.put(DbContact.READING_OPEN, reading_open);
contentValues.put(DbContact.READING_CLOSE, reading_close);
contentValues.put(DbContact.READING_NET, reading_net);
contentValues.put(DbContact.NET_AMOUNT, net_amount);
contentValues.put(DbContact.OPENING_BALANCE, opening_balance);
contentValues.put(DbContact.CLOSING_BALANCE, closing_balance);
contentValues.put(DbContact.REMARKS, remarks);
contentValues.put(DbContact.SYNC_STATUS_1, sync_status);
database.insert(DbContact.TABLE_NAME_TRANSPORT,null,contentValues);
}
public Cursor readFromLocalDatabase(SQLiteDatabase database) {
String[] projection = {DbContact.VEHICLE_NO,DbContact.EXP_DATE,DbContact.SOCIETY_NAME,DbContact.SPL_QTY,
DbContact.TRANSPORT_NAME,DbContact.TRANSPORT_VEHICLE_NO,DbContact.HSD,DbContact.TOLL_TAX,DbContact.FOOD,
DbContact.P_NAME,DbContact.P_EXPENSES,DbContact.READING_OPEN,DbContact.READING_CLOSE,DbContact.READING_NET,
DbContact.NET_AMOUNT, DbContact.OPENING_BALANCE,DbContact.CLOSING_BALANCE, DbContact.REMARKS,DbContact.SYNC_STATUS_1};
return (database.query(DbContact.TABLE_NAME_TRANSPORT, projection, null, null, null, null, null));
}
public void openDataBase() throws SQLException {
// open the database...
try {
String myPath = DATABASE_NAME + DbContact.TABLE_NAME;
jewlotDB = SQLiteDatabase.openDatabase(myPath, null,
SQLiteDatabase.OPEN_READWRITE);
} catch (Exception e) {
e.printStackTrace();
}
}
// check the state of db ??....
public boolean isOpen() {
return jewlotDB != null && jewlotDB.isOpen();
}
@Override
public synchronized void close() {
if (jewlotDB != null)
jewlotDB.close();
super.close();
}
public void updateLocalDatabase(String vehicle,String exp_date, String society_name,
String spl_qty, String transport_name, String transport_vehicle_no,
String hsd, String toll_tax, String food, String p_name,
String p_expenses, String reading_open, String reading_close,
String reading_net,String net_amount, String opening_balance,
String closing_balance, String remarks, int sync_status) {
if (!isOpen()) openDataBase();
SQLiteDatabase database = this.getReadableDatabase();
ContentValues contentValues = new ContentValues();
contentValues.put(DbContact.SYNC_STATUS_1, sync_status);
String selection = DbContact.VEHICLE_NO + " LIKE ?" +" AND "
+ DbContact.EXP_DATE + " LIKE ?"+" AND "
+ DbContact.SOCIETY_NAME + " LIKE ?"
+ DbContact.SPL_QTY + " LIKE ?" +" AND "
+ DbContact.TRANSPORT_NAME + " LIKE ?" +" AND "
+ DbContact.TRANSPORT_VEHICLE_NO + " LIKE ?" +" AND "
+ DbContact.HSD + " LIKE ?" +" AND "
+ DbContact.TOLL_TAX + " LIKE ?" +" AND "
+ DbContact.FOOD + " LIKE ?" +" AND "
+ DbContact.P_NAME + " LIKE ?" +" AND "
+ DbContact.P_EXPENSES + " LIKE ?" +" AND "
+ DbContact.READING_OPEN + " LIKE ?" +" AND "
+ DbContact.READING_CLOSE + " LIKE ?" +" AND "
+ DbContact.READING_NET + " LIKE ?" +" AND "
+ DbContact.NET_AMOUNT + " LIKE ?" +" AND "
+ DbContact.OPENING_BALANCE + " LIKE ?" +" AND "
+ DbContact.CLOSING_BALANCE + " LIKE ?" +" AND "
+ DbContact.REMARKS + " LIKE ?" ;
String[] selection_args = {vehicle,exp_date,society_name,spl_qty,transport_name,transport_vehicle_no,
hsd,toll_tax,food,p_name,p_expenses,reading_open,reading_close,reading_net,net_amount,
opening_balance,closing_balance,remarks};
database.update(DbContact.TABLE_NAME_TRANSPORT, contentValues, selection, selection_args);
database.close();
}
}
logcat的
java.lang.RuntimeException: Unable to start receiver com.example.myapplication.Transport.NetworkMonitor1: java.lang.IllegalArgumentException: column 'transport_vehicle_no ' does not exist