adapter

I have a graph in main activity also I have a recycler view in main activity. Custom adapter is used for recyclerview. I have a check box and swipe layout in list item layout. in swipe layout there is a delete button. I want to reset the graph of main activity when I check the check box or when I delete any item. For this I created one method in main activity. And called this method in adapter onCheckedChangeListener and on click of delete. But I am getting a null pointer exception on mBarChart. i.e . graph. I have instantiated in mBarChart in setUI method and this is called in onCreate of an

I want to create a dynamic listview which adds dynamic elements on scrolling to the end of the initial list. New items should be added everytime the scroll position reaches the end of previous list. How can I achieve this? Thank you. you need to add a scroll listener and override the onscroll() 来源： https://stackoverflow.com/questions/9454170/dynamic-list-view-with-a-dynamic-adapter

I want to populate listview through adapter using array like below: public class ChildActivity extends ActionBarActivity implements GetChildList { private ListView lv_child; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_child); List<String> array = new ArrayList<String>(); // for e.g array ["num1", "num2"] lv_child = (ListView)findViewById(R.id.lv_child); ArrayAdapter<String> adapterChild = new ArrayAdapter<String>(ChildActivity.this, android.R.layout.simple_list_item_1,array); lv_child.setAdapter

I have several methods in the ListAC ListActivity that I want to reuse and would like to put in separate classes (if possible??). I will be having dozens of ListView Activities (ListActivities ie: ListAD, ListTCDS, listSFAR, etc., etc.) that will call on these methods that are exactly the same in this activity but the only changes in the 'Cursor databaseCursor' (ie. The Table name for each ListActivity). I plan on putting these Classes and related into their own packages w/n the application (ie: com.myCompany.myApp.AC) Also, w/n these Activities there needs to be multiple coursers for the

以下文章转自 @安卓泡面 在工作中，曾多次碰到ScrollView嵌套ListView的问题，网上的解决方法有很多种，但是杂而不全。我试过很多种方法，它们各有利弊。 在这里我将会从使用ScrollView嵌套ListView结构的原因、这个结构碰到的问题、几种解决方案和优缺点比较，这4个方面来为大家阐述、分析、总结。 实际上不光是ListView，其他继承自AbsListView的类也适用，包括ExpandableListView、GridView等等，为了方便说明，以下均用ListView来代表。 一、 为什么要使用ScrollView嵌套ListView的奇怪的结构 ScrollView和ListView都是滚动结构，按理说，这两个控件在UI上的功能是一样的，但是看看下面这个设计： 这是天猫商城的确认订单的页面，ScrollView中嵌套了ExpandableListView，ExpandableListView上面有固定的一些控件，下面也有固定的一些控件，整体又要能够滚动。 列表数据要嵌在固定数据中间，并且作为整体一起滚动，有了这样的设计需求，于是就有了ScrollView嵌套ListView的奇怪结构。 二、 ScrollView、ListView嵌套结构碰到的问题 不多说，直接看失败例子： <ScrollView android:id="@+id/act_solution

I'm trying to create Recyclerview onLoadMore with ProgressBar at the bottom. I've tried this solution , but method onLoadMore in my Activity is never called. Please, help me. Here is my Adapter : public class NewsAdapterTest extends RecyclerView.Adapter<RecyclerView.ViewHolder> { private ArrayList<NewsDataModel> dataSet; private Context context; private final int VIEW_ITEM = 1; private final int VIEW_PROG = 0; // The minimum amount of items to have below your current scroll position before loading more. private int visibleThreshold = 2; private int lastVisibleItem, totalItemCount; private