Need a Structure to maintain Data in Android

Question

I have a structure made from ListView - Customised as seen in Image Below

I can add New Products on Click of AddProduct Button A new Category gets added with EditText of Product and Quantity On that I have a (+) and (-) button which adds subcategory for Enter Dealer and Quantity with remove button on it .

The structure has been good .

But the data maintenance on it difficult . Like when I scroll , the focus gets lost and the data goes else where on ListView .

Kindly suggest some code for this .

score 0 · Answer 1 · answered Oct 21 '15 at 11:17

0

I suggest to you to change the navigation structure. You can keep the delete feature on the listView maybe implementing the swipe as it happens for example in GMail. I would remove the add button and use FAB (Floating action Button) as Material guide lines suggest. Hope it will help you!

answered Oct 21 '15 at 11:17

FrancescoAzzola

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Thanks for help . But I need help while entering text inside the EditText and maintain it while deleting , scrolling the listview – Oct 21 '15 at 11:19
1

I think `add` and `delete` will working fine as you are saying. Its new style to use and also user friendly. But He is may be stuck with saving data of each `EditText` Dynamically. – Pratik Butani Oct 21 '15 at 11:19
@PratikButani : yep , you got me – Oct 21 '15 at 11:20

Pratik Butani · Answer 2 · 2015-10-21T11:44:47.613

I have implemented this thing with the following structure.

First of all I have created Model class for maintain data of Product.
I am saving data in JSONArray with collection of JSONObject of quantity added. (I have used JSON because I can save easily as a String in Preference.)

In onCreate of Activity I am creating SparseArray of Saved Products from JSONArray like:

try {

    JSONArray savedProdJSONArray = new JSONArray(productSharedPref.getString("productArray", new JSONArray().toString()));

    Log.i(TAG, "Saved ARRAY Count : " + productSharedPref.getInt("count", -1));

    for (int i = 0; i < savedProdJSONArray.length(); i++) {
        ProductItems tempPItems = new ProductItems();
        tempPItems.setProdId(savedProdJSONArray.getJSONObject(i).getInt("prod_id"));
        tempPItems.setProdQty(savedProdJSONArray.getJSONObject(i).getDouble("qty"));
        tempPItems.setProdName(savedProdJSONArray.getJSONObject(i).getString("name"));
    }
} catch (JSONException e) {
    // TODO Auto-generated catch block
    Log.e(TAG, "Json Err variant:"+e.getLocalizedMessage());
}

Now in getView() of Adapter I am checking with current ProductId and Saved ProductId is matched. If it is then fill up EditText with saved data like:

    /** First check whether value of Saved product Array is >0 or not..*/
    ProductItems savedProdTemp = prodItemsSavedList.get(holder.prodId, null);

    if(savedProdTemp != null)
    {
        productQtyValue = savedProdTemp.getProdQty();
        holder.prodQtyView.setText(""+productQtyValue);
    } else {
        holder.prodQtyView.setText("");
    }

Here you also have to addTextChangeListner for EditText to save data in ArrayList and then you have to Convert in JSONArray when Activity is Stop or Pause

I think it is little bit confusing but I thought it is only helps you. I tried many times to find out solution but didn't better than this.

Hope it will help you.

Welcomes you if you have any question. (Sorry If you found English Mistake :D)

Should I save this in JSON Array while I type in EditText ,since the issue comes during scrolling , deleting of child item of listview — , Oct 21 '15 at 12:52
Its like the data on entering text in EditText in ListView , the data stays on scrolling down after leaving the screen and then scrolling down and coming back the data may or may not be found on same EditText , it might go to some other EditText — , Oct 22 '15 at 07:03
I think it is because of you are adding `EditText` dynamically — Pratik Butani, Oct 22 '15 at 07:05
I have heard its a known problem in android and I need a good waythrough for it — , Oct 22 '15 at 07:08

Need a Structure to maintain Data in Android

2 Answers2