0
else ifステートメントを使用してアプリケーションで同じString属性の値を変更しようとしていますが、今まで私は値を変更することができませんでした。ここに私のコードの重要な部分があります。助言がありますか？'else if'ステートメントに適切な条件を設定して、Androidでクエリを実行する際の問題
protected void ScheduleOp1() {
// TODO Auto-generated method stub
String VarMin = "-140 minute";
db.execSQL("DROP VIEW IF EXISTS " + view_Schedule1);
db.execSQL("CREATE VIEW " + view_Schedule1 + " " + " AS SELECT "
+ sBusDepart + "," + sBusArrival + "," + sBusDepartT + ","
+ sBusArrivalT + " FROM" + " " + fDepart + " " + "INNER JOIN" + " "
+ sBusSchedule + " " + "ON " + sBusSchedule + "." + sBusDate + "="
+ fDepart + "." + fDate + " " + "WHERE " + fDate + "= '" + fDate1
+ "'" + " " + "AND" + " " + sBusDepartT + " "
+ "= strftime('%H:%M', '" + fTime + "', '" + VarMin + "');");
Cursor cur = fetchAllTodos();
startManagingCursor(cur);
if (cur.moveToFirst()) {
Toast.makeText(
getBaseContext(),
cur.getString(0) + " " + cur.getString(1) + " "
+ cur.getString(2) + " " + cur.getString(3) + "\n",
Toast.LENGTH_LONG).show();
} else if (cur.moveToFirst() == false) {
VarMin = "-150 minute";
} else {
Toast.makeText(this, "Not found", Toast.LENGTH_LONG).show();
}
}
あなたが私を助けてくれることを願っています。
--Updated--
ここでは、コードの更新です。私がしようとしていることは、作成したビューを通して検索を実行するために、常に 'VarMin'の値を変更することです。 'else'ステートメントは、結果が全く見つからないときのためのステートメントです。
protected void ScheduleOp1() {
// TODO Auto-generated method stub
db.execSQL("DROP VIEW IF EXISTS " +view_Schedule1);
db.execSQL("CREATE VIEW " +view_Schedule1+ " " +
" AS SELECT " +sBusDepart+ "," +sBusArrival+ ","
+sBusDepartT+ "," +sBusArrivalT+ " FROM" + " "
+fDepart+ " " + "INNER JOIN" + " " +sBusSchedule+ " " +
"ON " +sBusSchedule+ "." +sBusDate+ "=" +fDepart+ "."
+fDate+ " " + "WHERE " +fDate+ "= '" +fDate1+"'"+" "+
"AND" + " " +sBusDepartT+ " " + "= strftime('%H:%M', '" +fTime+ "', '" +VarMin+"');");
Cursor cur = fetchAllTodos();
startManagingCursor (cur);
if (cur.moveToFirst()) {
Toast.makeText(getBaseContext(), cur.getString(0)+ " " +cur.getString(1)+ " "
+cur.getString(2)+ " " +cur.getString(3)+ "\n",
Toast.LENGTH_LONG).show();
}else if (cur.moveToFirst() == false){
VarMin = "-145 minute";
}
else if (cur.moveToFirst() == false){
VarMin = "-150 minute";
}
else{
Toast.makeText(this, "Not found", Toast.LENGTH_LONG).show();
}
}
//fetching records from database
public Cursor fetchAllTodos() {
return db.query(view_Schedule1, new String [] {sBusDepart,
sBusArrival, sBusDepartT, sBusArrivalT }, null, null, null, null, null);
}
}
あなたが私を助けてくれることを願っています。
--update - ここ
フルコードの更新です。
package sirtat.individualProject.PublicTransportationTimeScheduler;
import android.app.Activity;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
import android.widget.TimePicker;
import android.widget.DatePicker;
import java.util.Calendar;
import java.util.Locale;
import android.database.Cursor;
public class ScheduleActivity extends Activity {
SQLiteDatabase db;
TimePicker timePicker;
DatePicker datePicker;
int hour, minute;
int yr, month, day;
static String fDate1="DepartureDate";
static String fDate2="DepartureDate";
static String fTime="DEPART_TIME";
static String fTime2="DEPART_TIME";
public static final String view_Schedule1 = "ViewSchedule1";
public static final String sBusArrival = "SBusArrivalLocation";
public static final String sBusDepart = "SBusDepartLocation";
public static final String sBusArrivalT = "SBusArrivalTime";
public static final String sBusDepartT = "SBusDepartTime";
public static final String fDepart = "FlightDeparture";
public static final String sBusSchedule = "SkyBusSchedule";
public static final String sBusDate = "SkyBusDate";
public static final String fDate = "FlightDate";
private int Min=140;
private String getVarMin(){
return "-"+Min+" " + "minute";
}
//private String VarMin = "";
/** Called when the activity is first created */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.schedule_layout);
db = openOrCreateDatabase("PublicTransport2" , SQLiteDatabase.CREATE_IF_NECESSARY, null);
db.setVersion(1);
db.setLocale(Locale.getDefault());
db.setLockingEnabled(true);
Calendar today = Calendar.getInstance();
//--GET THE CURRENT DATE--
yr= today.get(Calendar.YEAR);
month = today.get(Calendar.MONTH);
day = today.get(Calendar.DAY_OF_MONTH);
//--GET THE CURRENT TIME--
hour = today.get(Calendar.HOUR);
minute = today.get(Calendar.MINUTE);
timePicker = (TimePicker) findViewById(R.id.timePicker);
datePicker = (DatePicker) findViewById(R.id.datePicker);
//--Button view--
Button btnOp1 = (Button) findViewById(R.id.btnOption1);
btnOp1.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
int year1 = datePicker.getYear();
int mnth1 = datePicker.getMonth() + 1;
int dy1 = datePicker.getDayOfMonth();
int hr1 = timePicker.getCurrentHour();
int min1 = timePicker.getCurrentMinute();
fDate1 = (pad(year1)) + ("-") + (pad(mnth1))
+ ("-") + (pad(dy1));
fTime = (pad(hr1)) + (":") + (pad(min1));
ScheduleOp1();
}
private Object pad(int b) {
// TODO Auto-generated method stub
if (b >= 10){
return String.valueOf(b);
}else{
return "0" + String.valueOf(b);
}
}
});
Button btnOp2 = (Button) findViewById(R.id.btnScheduleOption2);
btnOp2.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
int year2 = datePicker.getYear();
int mnth2 = datePicker.getMonth() + 1;
int dy2 = datePicker.getDayOfMonth();
int hr2 = timePicker.getCurrentHour();
int min2 = timePicker.getCurrentMinute();
fDate2 = (pad2(year2)) + ("-") + (pad2(mnth2))
+ ("-") + (pad2(dy2));
fTime2 = (pad2(hr2)) + (":") + (pad2(min2));
ScheduleOp2();
}
private Object pad2(int c) {
// TODO Auto-generated method stub
if (c >= 10){
return String.valueOf(c);
}else{
return "0" + String.valueOf(c);
}
}
});
}
protected void ScheduleOp1() {
// TODO Auto-generated method stub
Cursor cur = null;
boolean mustCont = true;
while (mustCont){
db.execSQL("DROP VIEW IF EXISTS " +view_Schedule1);
db.execSQL("CREATE VIEW " +view_Schedule1+ " " +
" AS SELECT " +sBusDepart+ "," +sBusArrival+ ","
+sBusDepartT+ "," +sBusArrivalT+ " FROM" + " "
+fDepart+ " " + "INNER JOIN" + " " +sBusSchedule+ " " +
"ON " +sBusSchedule+ "." +sBusDate+ "=" +fDepart+ "."
+fDate+ " " + "WHERE " +fDate+ "= '" +fDate1+"'"+" "+
"AND" + " " +sBusDepartT+ " " + "= strftime('%H:%M', '" +fTime+ "', '" +getVarMin()+"');");
cur = fetchAllTodos();
if (cur.getCount() == 0){
switch (Min){
case 140 :
Min = 145;
break;
case 145 :
Min = 150;
break;
case 150 :
Min = 155;
break;
case 155 :
Min = 180;
break;
case 200 :
mustCont = false;
break;
}
}else{
mustCont = false;
}
}
if(cur != null && cur.getCount()>0){
cur.moveToFirst();
Toast.makeText(getBaseContext(), cur.getString(0)+ " " +cur.getString(1)+ " "
+cur.getString(2)+ " " +cur.getString(3)+ "\n",
Toast.LENGTH_LONG).show();
}else {
Toast.makeText(this, "Not found", Toast.LENGTH_LONG).show();
}
}
protected void ScheduleOp2(){
Toast.makeText(getBaseContext(), "Date selected:"
+ fDate2 + "\n" +
"Time Selected:" + fTime2,
Toast.LENGTH_LONG).show();
}
//fetching records from database
public Cursor fetchAllTodos() {
return db.query(view_Schedule1, new String [] {sBusDepart,
sBusArrival, sBusDepartT, sBusArrivalT }, null, null, null, null, null);
}
}
そしてここでコード
protected void ScheduleOp1() {
// TODO Auto-generated method stub
Cursor cur = null;
boolean mustCont = true;
while (mustCont){
db.execSQL("DROP VIEW IF EXISTS " +view_Schedule1);
db.execSQL("CREATE VIEW " +view_Schedule1+ " " +
" AS SELECT " +sBusDepart+ "," +sBusArrival+ ","
+sBusDepartT+ "," +sBusArrivalT+ " FROM" + " "
+fDepart+ " " + "INNER JOIN" + " " +sBusSchedule+ " " +
"ON " +sBusSchedule+ "." +sBusDate+ "=" +fDepart+ "."
+fDate+ " " + "WHERE " +fDate+ "= '" +fDate1+"'"+" "+
"AND" + " " +sBusDepartT+ " " + "= strftime('%H:%M', '" +fTime+ "', '" +getVarMin()+"');");
cur = fetchAllTodos();
if (cur.getCount() == 0){
switch (Min){
case 140 :
Min = 145;
break;
case 145 :
Min = 150;
break;
case 150 :
Min = 155;
break;
case 155 :
Min = 180;
break;
case 200 :
mustCont = false;
break;
}
}else{
mustCont = false;
}
}
if(cur != null && cur.getCount()>0){
cur.moveToFirst();
Toast.makeText(getBaseContext(), cur.getString(0)+ " " +cur.getString(1)+ " "
+cur.getString(2)+ " " +cur.getString(3)+ "\n",
Toast.LENGTH_LONG).show();
}else {
Toast.makeText(this, "Not found", Toast.LENGTH_LONG).show();
}
}
の重要な部分に更新され君たちが私を助けることができる願っています。 Thx
'の場合は、他の（cur.moveToFirst（）== false）を' あなたは真でない場合はfalseでなければならないので、単に 'else'を使うことができます。とにかくあなたが直面している問題は何ですか？あなたのVarMin変数は変更されていませんか？コンソールで印刷することによって 'cur.moveToFirst（）'の値を確認してください。 – Antrromet
こんにちは、私は他の情報に変更することはできません。前回の検索で見つかった情報がない場合、 'VarMin'属性の値を変更し続けるために、複数のelse if文の条件を引用する良い方法がありますか？私は 'if'ステートメントからトーストをコピー＆ペーストしようとしましたが、例外エラーが発生しました。どのような提案ですか？ – CookieMan
元に戻ってみましょう。あなたは検索していると言いますが、私は比較を行っていません。あなたの検索が成功したときを定義するために何を探しているのですか？ – Barak