[英]How to insert Arraylist into sqlite in Android ?
我想在我的sqlite中插入Arraylist,而在anggota coloumn中没有相同的值,如下所示:
helper=new DBSpaj(getActivity());
for (int i=0; i<ListKeluargaPP.size();i++) {
helper.insertTableMarital(
a,
ListKeluargaPP.get(i).getAnggota_pp(),
ListKeluargaPP.get(i).getNama_Anggota_pp(),
ListKeluargaPP.get(i).getTtl_Anggota_pp()
);
这是我的插入代码:
public void insertTableMarital(
String master_id,
String anggota,
String nama,
String ttl
)
{
String selectQuery = "SELECT master_id,anggota FROM table_marital " +
"where master_id='"+Menu_SPPAJ.getX()+"'";
SQLiteDatabase db = this.getReadableDatabase();
Cursor cursor = db.rawQuery(selectQuery, null);
if (cursor.equals(null)){
ContentValues cv=new ContentValues();
cv.put("master_id", master_id);
cv.put("anggota", anggota);
cv.put("nama", nama);
cv.put("ttl", ttl);
getWritableDatabase().insert("table_marital",null, cv);
}
if (cursor.getString(1)!=PemegangPolis.getStrAnggota()){
ContentValues cv=new ContentValues();
cv.put("master_id", master_id);
cv.put("anggota", anggota);
cv.put("nama", nama);
cv.put("ttl", ttl);
getWritableDatabase().insert("table_marital",null, cv);
}else {
System.out.println("udah ada");
}
}
我想保存它时出错,而logcat如下所示:
02-04 10:15:31.274: E/AndroidRuntime(17174): FATAL EXCEPTION: main
02-04 10:15:31.274: E/AndroidRuntime(17174): android.database.CursorIndexOutOfBoundsException: Index -1 requested, with a size of 0
02-04 10:15:31.274: E/AndroidRuntime(17174): at android.database.AbstractCursor.checkPosition(AbstractCursor.java:418)
02-04 10:15:31.274: E/AndroidRuntime(17174): at android.database.AbstractWindowedCursor.checkPosition(AbstractWindowedCursor.java:136)
02-04 10:15:31.274: E/AndroidRuntime(17174): at android.database.AbstractWindowedCursor.getString(AbstractWindowedCursor.java:50)
02-04 10:15:31.274: E/AndroidRuntime(17174): at id.co.ajsmsig.espaj.DBSpaj.insertTableMarital(DBSpaj.java:912)
02-04 10:15:31.274: E/AndroidRuntime(17174): at id.co.ajsmsig.espaj.PemegangPolis.onSave(PemegangPolis.java:1574)
02-04 10:15:31.274: E/AndroidRuntime(17174): at id.co.ajsmsig.espaj.Menu_SPPAJ$SlideMenuClickListener.onClick(Menu_SPPAJ.java:243)
02-04 10:15:31.274: E/AndroidRuntime(17174): at android.view.View.performClick(View.java:4222)
02-04 10:15:31.274: E/AndroidRuntime(17174): at android.view.View$PerformClick.run(View.java:17337)
02-04 10:15:31.274: E/AndroidRuntime(17174): at android.os.Handler.handleCallback(Handler.java:615)
02-04 10:15:31.274: E/AndroidRuntime(17174): at android.os.Handler.dispatchMessage(Handler.java:92)
02-04 10:15:31.274: E/AndroidRuntime(17174): at android.os.Looper.loop(Looper.java:137)
02-04 10:15:31.274: E/AndroidRuntime(17174): at android.app.ActivityThread.main(ActivityThread.java:4895)
02-04 10:15:31.274: E/AndroidRuntime(17174): at java.lang.reflect.Method.invokeNative(Native Method)
02-04 10:15:31.274: E/AndroidRuntime(17174): at java.lang.reflect.Method.invoke(Method.java:511)
02-04 10:15:31.274: E/AndroidRuntime(17174): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:994)
02-04 10:15:31.274: E/AndroidRuntime(17174): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:761)
02-04 10:15:31.274: E/AndroidRuntime(17174): at dalvik.system.NativeStart.main(Native Method)
我不知道我的错在哪里,我希望有人能理解我的问题并帮助我解决问题。
我已解决了我的问题,将所有cursor.getString(1)
放在List中,然后使用以下代码逐个检查:
public void insertTableMarital(
String master_id,
String anggota,
String nama,
String ttl
)
{
List<String> test= new ArrayList<String>();
String selectQuery = "SELECT master_id,anggota FROM table_marital " +
"where master_id='"+Menu_SPPAJ.getX()+"'";
SQLiteDatabase db = this.getReadableDatabase();
Cursor cursor = db.rawQuery(selectQuery, null);
if(cursor.getCount()>0){
cursor.moveToPosition(cursor.getCount() - 1);
if (cursor.moveToFirst()) {
do {
test.add(cursor.getString(1));
} while (cursor.moveToNext());
}
Log.i("TES LAIN", PemegangPolis.getStrAnggota());
if (!(test.contains(PemegangPolis.getStrAnggota()))){
ContentValues cv=new ContentValues();
cv.put("master_id", master_id);
cv.put("anggota", anggota);
cv.put("nama", nama);
cv.put("ttl", ttl);
getWritableDatabase().insert("table_marital",null, cv);
}
else {
System.out.println("udah ada");
}
}
else {
ContentValues cv=new ContentValues();
cv.put("master_id", master_id);
cv.put("anggota", anggota);
cv.put("nama", nama);
cv.put("ttl", ttl);
getWritableDatabase().insert("table_marital",null, cv);
}
}
您需要先调用cursor.moveToFirst()
然后才能使用它,此时它指向第一个(如果有)条目之前
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