1# Linear Container ArrayList 2 3### Introduction 4 5This sample uses the linear container **ArrayList** to simulate the operations of adding and deleting a contact. It shows the functionalities provided by the **ArrayList** APIs. 6 7### Usage 8 91. On the home screen of the sample app, touch **+** in the upper right corner. 102. In the dialog box displayed, enter the contact name and other information. 113. Click **OK** to save the information. The new contact information is displayed on the home screen. 124. Click **Delete** to delete the contact information. 13 14### Constraints 15 16This sample can only be run on standard-system devices. 17