我有一個程序,你點擊一個按鈕,並彈出一個對話框與一堆複選框。您選擇一些複選框,然後單擊「確定」。我試圖做的是讓它在按下ok時,對於每個檢查過的值,它將搜索多個數據庫表中包含該值的行,從這些行中獲取信息並將它們放入不同的表中。出於某種原因,我一直讓這個遊標超出界限例外,我真的不明白爲什麼。我嘗試了一些我在搜索時發現的東西,但無法使其工作。Android:光標出界異常
下面是當您單擊確定會發生什麼:
ok.setOnClickListener(new View.OnClickListener(){
public void onClick(View v) {
if (dumbbells.isChecked()==true){
equip = "dumbbells";
AddToEquipTable(equip);
}
if (barbell.isChecked()==true){
equip = "Barbell";
AddToEquipTable(equip);
}
if (cablemachine.isChecked()==true){
equip = "Cable Machine";
AddToEquipTable(equip);
}
if (pullupbar.isChecked()==true){
equip = "Pull Up Bar";
AddToEquipTable(equip);
}
if (legpressmachine.isChecked()==true){
equip = "Leg Press Machine";
AddToEquipTable(equip);
}
if (legextensionmachine.isChecked()==true){
equip = "Leg Extension Machine";
AddToEquipTable(equip);
}
if (hamstringcurlmachine.isChecked()==true){
equip = "Hamstring Curl Machine";
AddToEquipTable(equip);
}
if (kettlebells.isChecked()==true){
equip = "Kettlebells";
AddToEquipTable(equip);
}
if (none.isChecked()==true){
equip = "None";
AddToEquipTable(equip);
}
}
});
這裏是「AddToEquipTable」的方法,我創建:
public void AddToEquipTable(String equip){
ExerciseDatabase equipment = new ExerciseDatabase(WorkMeOutActivity.this);
try {
equipment.open();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
equipment.AddToEquipmentDBFromBiceps(equip);
equipment.AddToEquipmentDBFromChest(equip);
equipment.AddToEquipmentDBFromBack(equip);
equipment.AddToEquipmentDBFromTriceps(equip);
equipment.AddToEquipmentDBFromShoulders(equip);
equipment.AddToEquipmentDBFromLegs(equip);
equipment.AddToEquipmentDBFromCompound(equip);
equipment.close();
}
這裏是它在我的數據庫輔助函數的方法之一活動。它們都是一樣的,除了名稱叫做表格名稱。
public String AddToEquipmentDBFromBiceps(String equip) {
// TODO Auto-generated method stub
String[] columns = new String[]{KEY_REPS, KEY_EXERCISE, KEY_TIMETYPE};
ContentValues cv = new ContentValues();
Cursor c = ourDatabase.query(DATABASE_BICEPSTABLE, columns, KEY_EQUIP + "='" + equip + "'", null, null, null, null);
if (c == null){
return null;
}
else if(c != null){
c.moveToFirst();
int iReps = c.getColumnIndex(KEY_REPS);
int iExercise = c.getColumnIndex(KEY_EXERCISE);
int iTimeType = c.getColumnIndex(KEY_TIMETYPE);
do{
String reps = c.getString(iReps);
String exercise = c.getString(iExercise);
String time = c.getString(iTimeType);
cv.put(KEY_REPS, reps);
cv.put(KEY_EXERCISE, exercise);
cv.put(KEY_TIMETYPE, time);
ourDatabase.insert(DATABASE_CHOSEN_EQUIP_TABLE, null, cv);
c.moveToNext();
}while(KEY_EQUIP == equip);
}
return null;
}
**錯誤日誌變更條件的建議下面後:
while (c.moveToNext() && KEY_EQUIP == equip);
注:此外,我建議
06-24 09:34:42.785: E/AndroidRuntime(20592): FATAL EXCEPTION: main
06-24 09:34:42.785: E/AndroidRuntime(20592): android.database.CursorIndexOutOfBoundsException: Index 0 requested, with a size of 0
06-24 09:34:42.785: E/AndroidRuntime(20592): at android.database.AbstractCursor.checkPosition(AbstractCursor.java:580)
06-24 09:34:42.785: E/AndroidRuntime(20592): at android.database.AbstractWindowedCursor.checkPosition(AbstractWindowedCursor.java:214)
06-24 09:34:42.785: E/AndroidRuntime(20592): at android.database.AbstractWindowedCursor.getString(AbstractWindowedCursor.java:41)
06-24 09:34:42.785: E/AndroidRuntime(20592): at com.work.me.out.ExerciseDatabase.AddToEquipmentDBFromLegs(ExerciseDatabase.java:896)
06-24 09:34:42.785: E/AndroidRuntime(20592): at com.work.me.out.WorkMeOutActivity.AddToEquipTable(WorkMeOutActivity.java:456)
06-24 09:34:42.785: E/AndroidRuntime(20592): at com.work.me.out.WorkMeOutActivity$9.onClick(WorkMeOutActivity.java:395)
06-24 09:34:42.785: E/AndroidRuntime(20592): at android.view.View.performClick(View.java:2538)
06-24 09:34:42.785: E/AndroidRuntime(20592): at android.view.View$PerformClick.run(View.java:9152)
06-24 09:34:42.785: E/AndroidRuntime(20592): at android.os.Handler.handleCallback(Handler.java:587)
06-24 09:34:42.785: E/AndroidRuntime(20592): at android.os.Handler.dispatchMessage(Handler.java:92)
06-24 09:34:42.785: E/AndroidRuntime(20592): at android.os.Looper.loop(Looper.java:130)
06-24 09:34:42.785: E/AndroidRuntime(20592): at android.app.ActivityThread.main(ActivityThread.java:3687)
06-24 09:34:42.785: E/AndroidRuntime(20592): at java.lang.reflect.Method.invokeNative(Native Method)
06-24 09:34:42.785: E/AndroidRuntime(20592): at java.lang.reflect.Method.invoke(Method.java:507)
06-24 09:34:42.785: E/AndroidRuntime(20592): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:842)
06-24 09:34:42.785: E/AndroidRuntime(20592): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)
06-24 09:34:42.785: E/AndroidRuntime(20592): at dalvik.system.NativeStart.main(Native Method)
我只是去嘗試......仍然得到同樣的光標出界外 – SillyFidget
此處添加您的錯誤日誌。 – Sajmon
看到我更新的答案並用我的替換你的條件片段。 – Sajmon