问题
This is what I want:
As you can see in the image I have stored sub-Lists on each main List position. Now I want to display one item from sub-list when main loop is working. If looping counter is greater than sub-List size then it starts again from 0 and increments one by one.
What I have done:
I have got the data from database and stored sub-Lists in a ArrayList
public static ArrayList<ArrayList<HashMap<String, String>>> selectdataloop(SQLiteDatabase db, String TableName,String userfield,String userid,String dbfield, String fieldValue,String selectedplaylistid)
{
int count=0;
ArrayList<ArrayList<HashMap<String, String>>> data = new ArrayList<ArrayList<HashMap<String,String>>>();
ArrayList<HashMap<String, String>> odata = new ArrayList<HashMap<String,String>>();
String Query="SELECT * FROM myfiles WHERE (( Datetime('2014-09-01 09:50:15') >= startdate AND Datetime('2014-09-01 09:50:15') <= enddate ) AND (('09:50:15' >= strftime('%H:%M:%S',timer_from) AND '09:50:15' <= strftime('%H:%M:%S',timer_to )) OR ( strftime('%H:%M:%S',timer_from) = '00:00:00' OR '00:00:00' = strftime('%H:%M:%S',timer_to )))) AND ( Monday = 1 OR Everyday = 1) AND download = 1 AND playlist_id = 24 AND user_id='83' ORDER BY position_id ASC, subposition_id ASC";
Cursor cursor = db.rawQuery(Query, null);
if(cursor.getCount()<=0)
{
cursor.close();
return data;
}
else
{
if (cursor.moveToFirst())
{
do
{
HashMap<String, String> map = new HashMap<String, String>();
String currenttype=cursor.getString(9);
String nexttype = null;
if(count<cursor.getCount())
{
if(cursor.getPosition()==cursor.getCount()-1)
{
nexttype="image";
Log.d("nexttype==image","--->"+cursor.getCount());
}
else
{
cursor.moveToNext();
nexttype=cursor.getString(9);
cursor.moveToPrevious();
}
}
count++;
map.put(DB_Constant.MYFILES.FILE_ID, cursor.getString(cursor.getColumnIndex(DB_Constant.MYFILES.FILE_ID)));
map.put(DB_Constant.MYFILES.FILE_TYPE, cursor.getString(cursor.getColumnIndex(DB_Constant.MYFILES.FILE_TYPE)));
map.put(DB_Constant.MYFILES.FILE_SUBTYPE, cursor.getString(cursor.getColumnIndex(DB_Constant.MYFILES.FILE_SUBTYPE)));
map.put(DB_Constant.MYFILES.FILE_PATH, cursor.getString(cursor.getColumnIndex(DB_Constant.MYFILES.FILE_PATH)));
map.put(DB_Constant.MYFILES.USERID, cursor.getString(cursor.getColumnIndex(DB_Constant.MYFILES.USERID)));
map.put(DB_Constant.MYFILES.FILE_SECOND, cursor.getString(cursor.getColumnIndex(DB_Constant.MYFILES.FILE_SECOND)));
map.put(DB_Constant.MYFILES.FILE_DOWNLOAD, cursor.getString(cursor.getColumnIndex(DB_Constant.MYFILES.FILE_DOWNLOAD)));
map.put(DB_Constant.MYFILES.FILE_STARTTIME, cursor.getString(cursor.getColumnIndex(DB_Constant.MYFILES.FILE_STARTTIME)));
map.put(DB_Constant.MYFILES.FILE_ENDTIME, cursor.getString(cursor.getColumnIndex(DB_Constant.MYFILES.FILE_ENDTIME)));
map.put(DB_Constant.MYFILES.FILE_TIMERFROM, cursor.getString(cursor.getColumnIndex(DB_Constant.MYFILES.FILE_TIMERFROM)));
map.put(DB_Constant.MYFILES.FILE_TIMERTO, cursor.getString(cursor.getColumnIndex(DB_Constant.MYFILES.FILE_TIMERTO)));
map.put(DB_Constant.MYFILES.FILE_STUDIOFORMAT, cursor.getString(cursor.getColumnIndex(DB_Constant.MYFILES.FILE_STUDIOFORMAT)));
odata.add(map);
if(currenttype.equalsIgnoreCase("image") || currenttype.equalsIgnoreCase("video"))
{
data.add(odata);
odata = new ArrayList<HashMap<String,String>>();
}
else if(nexttype.equalsIgnoreCase("image") || nexttype.equalsIgnoreCase("video"))
{
data.add(odata);
odata = new ArrayList<HashMap<String,String>>();
}
// get the data into array,or class variable
} while (cursor.moveToNext());
}
}
Log.e("data","---->"+data.size());
Log.e("data","---->"+data);
cursor.close();
return data;
}
ArrayList<ArrayList<HashMap<String, String>>> data2 = new ArrayList<ArrayList<HashMap<String,String>>>();
data2=DB_Helper.selectdataloop(mSQLiteDatabase, "", "", "", "", "", "");
for(int i=0;i<data2.size();i++)
{
Log.v("Main Loop","----i----"+i);
ArrayList<HashMap<String,String>> idata=data2.get(i);
if(i<idata.size())
{
String id=idata.get(i).get("file_id").toString();
Log.e("i<data.size","----------"+id);
}
else
{
String id=idata.get(0).get("file_id").toString();
Log.d("i>data.size","----------"+id);
}
}
来源：https://stackoverflow.com/questions/25622025/round-looping-not-work-in-arraylist-with-hashmap-for-display-images