You can download the complete example from here.

JSONObject obj=new JSONObject(data_array.get(i).toString()) JSONArray data_array=new JSONArray(data) įor (int i = 0 i < data_array.length() i++) Let's complete now the get_data interface function, called as soon as the data are ready. You can find this JSON data right here.Īs you can seee the structure is the following: In this example I've provided for you a simple JSON data structure composed by an array of objects. Public class Download_data implements Runnable parenthesis. This let us to define a custom Runnable class and to perform the background process. On the top, where the class name is defined, be sure to write implements Runnable. Create a new java class, call it Download_data. Let's now create the class that will download the data in background. Populate a listview in Android Studio, I cannot get my listview object populated with the string below in my mainactivity.java file. Insert two TextView components.īe sure that in the androidmanifest.xml you've added the internet permission In the activity_main.xml layout add the Listview component.Ĭreate now a new android xml file, call it cell.xml, it will be used for the custom ListView cell definition. You'll see how to download data from URL in an asynchronous way using a Thread, how to extract the data from the JSON format using a free json library and how to define an adapter for a cutom ListView. You'll learn how to load data from URL in Android, how to define the Android ListView and how to use the JSON format in an Android ListView component.

Populate listview android studio