11/10/2022 0 Comments Add items to listview android studio![]() ![]() there would be no need for virtually all of your code just the insert (based upon the INSERT SQL above but catering for passing values instead of the hard coded values in the demo) and then building the new list after the insert. The result output (from the SELECT) being:. INSERT INTO category_value (categorydate,categoryvalue,categoryname,categoryinfo,categorytotal) run the same query but with different values):- /* Preapre the demo environment (tables) */ĬREATE TABLE IF NOT EXISTS category_value (id INTEGER PRIMARY KEY, categoryvalue TEXT, categoryname TEXT, categoryinfo TEXT, categorydate TEXT, categorytotal TEXT DEFAULT 0) ORDER BY substr(categorydate,7,2)||substr(categorydate,1,2)||substr(categorydate,4,4) DESCĪs a demo, consider the following which is used to insert all 4 four rows in progression (i.e. Step 2 Add the following code to res/layout/activitymain.xml. Step 1 Create a new project in Android Studio, go to File New Project and fill all required details to create a new project. * Really dates should be in a recognised format see */ This example demonstrates how do I dynamically add elements in ListView in android. * could use ORDER BY rowid DESC as an alternative IF ALWAYS INSERTING a later date*/ There is likely no need to do this the way that you are trying, rather you could do this all in a single insert e.g.:- INSERT INTO category_value (categorydate,categoryvalue,categoryname,categoryinfo,categorytotal)ĬAST('3.75' /* SAME VALUE AS the value !!!IMPORTANT!!!*/ AS REAL) +ĬOALESCE( /* just in case null (e.g. When I run the app and type random examples in it actually sums up the total! However, when I close and re-open the app the ListView is still there but the total starts from scratch. ValueModel newValue = new ValueModel(categoryDate, categoryValue, categoryInfo, categoryName, categoryTotal) thisCate_f = Float.valueOf(categoryTotal) ĬategoryTotal = Float.toString(totalCate_f) lastCate_f = Float.valueOf(lastCategory) lastCategory = cursor3.getString(5) back to string) cursor3.moveToPrevious() sum the previous numbers and put it cursor3 = cursor (I was trying to convert it to float, insert it into the return list and be able to make this function succeed if ther eare results loop through the results and creat the new customer results for each row SQLiteDatabase db = this.getReadableDatabase() Ĭursor cursor = db.rawQuery(queryString, null) Ĭursor cursor2 = db.rawQuery(queryString, null) Ĭursor cursor3 = db.rawQuery(queryString, null) String queryString = "SELECT * FROM " + CATEGORY_VALUE So it shows total money spent (but it only saves the ListView and does not save the total value when the app is closed). ![]()
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