So we need a dataset and a View into which the dataset will be converted by the Adapter. So by doing this, we have defined a ListView to be created in our MainActivity, but what data it will show? and in what format? Where will we declare and define that?Īs we specified in the last tutorial, that an Adapter is used to covert data items into view objects which can be used to display as UI components. We will define a ListView in the main layout XML file activity_main.xml.
Handling click events When the user selects an item from the options menu (including action items in the app bar), the system calls your activitys onOptionsItemSelected () method. Let's see how we can use an Adapter to read data from an array, and display it in form of a List. If youve developed for Android 3.0 and higher, the system calls onCreateOptionsMenu () when starting the activity, in order to show items to the app bar. A drawable or any color can be specified as a value for this attribute.īelow we have shown how you can add a ListView to your android app using the layout XML. Using this attribute we can specify a divider between List items. Inside a ListView, we can show list of Text items by using TextView, or pictures using ImageView, or any other view or a combination of views.Īs ListView is generally used to display a large set of data, hence it is not feasible to manually create list items for the complete data, hence Android provides us with special Adapter classes which can be used to supply data from datasets to ListView.įollowing are some of the main attributes that are most commonly used: Attribute A new XML file, navgraph.xml, will be created in the Navigation folder, as shown below. In the next dialog, select Navigation as the Resource Type, and click OK. You can set divider between every item and set its height and color as per your UI design. To add a navigation graph, right-click on the res directory and select New > Android Resource File. With ListView, user can easily browse the information, while scrolling up and down.
Best example of it is our device's Contact List. ListView is used when you have to show items in a vertically scrolling list.
Android SDK Manager & required Packages.This,R.layout.list_black_text,R.id.list_content, values)) Here is my list adapter and the onItemClickListener: ListView lv = (ListView)findViewById(R.id.listView1) I would like to get the text from the selected item.
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