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POHashMap Iteration only shows last element
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20303652
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2013-11-30T17:55:55.963
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2013-11-30T18:27:08.380
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I'm trying to implement an expandable listview with data coming from a database. I've already tried having the data added within the codes and it works so I'm now trying to have dynamic data from the database populate the listview. The data is grouped in two, the main category and the member. For example if the main category is fruit, it's members may include mango, avocado, apples, etc. If animals, it may have horses, eagle, shark. The data always comes in pairs such as Animal, Horses; Animal, Eagle; Fruit, Apples. The expandable listview should appear as: Animal -- Horses -- Eagle Fruit -- Apples My code below can already determine the main group so the headers already display the main groupings of Fruit and Animal. By using <pre><code>group_member.put(family_name, member_name); </code></pre> I linked the member to the main category. My problem now is how to code for the iteration to group the members to the main category. So far I've already tried using iterator based on the sample codes given here in stackoverflow and from other sites however only the last elements of each group is display. I've also tried using the for-each loop bur still no success. <pre><code>String json = jsonParser.makeHttpRequest(URL_COMPONENTS, "POST", params); JSONArray components = null; ArrayList<HashMap<String, String>> componentList; List<String> main_group = new ArrayList<String>(); HashMap<String, String> group_member = new HashMap<String, String>(); try { components = new JSONArray(json); if (components != null) { for (int i = 0; i < components.length(); i++) { JSONObject c = components.getJSONObject(i); String family_name = c.getString(TAG_FAMILY_NAME); String member_name = c.getString(TAG_MEMBER_NAME); main_group.add(family_name); group_member.put(family_name, member_name); if (!listDataHeader.contains(main_group)) listDataHeader.add(main_group); componentList.add(group_member); } } } </code></pre> Please help. Thanks in advance!
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<android><expandablelistview>
Title
HashMap Iteration only shows last element
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PostAcceptedAnswerId
1. This table or related slice is empty.
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1. This table or related slice is empty.
PostTypePostTypeId
1. PTQuestion
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1. USuser3052644
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PostLinksRelatedPostIdPostId
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1. This table or related slice is empty.
PostsParentIdCreationDate
1. PO
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A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.