How to Keep List Item Highlight and Display the Correct Details in Android ListView?

How to Maintain List Item Highlight in Android ListView

Problem Statement

In an Android application, we have two ListViews: one displays a list of clients ('t'), and the other shows details of the selected client ('td'). However, when a client is selected in 't', the highlight disappears, and 'td' does not display the correct information.

Solution

To maintain the selected item's highlight and ensure 'td' displays the appropriate details, we can utilize the following:

1. Declare the following attributes in the relevant ListView XML elements:

   android:choiceMode="singleChoice"
   android:listSelector="#666666"

   This enables single item selection and applies a background color to the selected item.

2. Programmatically set these properties in your Java code:

   listView.setChoiceMode(AbsListView.CHOICE_MODE_SINGLE);
   listView.setSelector(R.drawable.selector_background); // You can specify a custom selector Drawable

Explanation

• android:choiceMode="singleChoice" allows only one item to be selected at a time.
• android:listSelector specifies the background color to be applied to the selected item.
• listView.setSelector() and listView.setChoiceMode() allow you to programmatically set the selector and choice mode, respectively.

Additional Notes

It's important to note that manipulating a view's background directly, as attempted in your original approach, is not recommended. When the list is scrolled, views may be reused, leading to inconsistencies in highlighting and incorrect data updates. By using the proper methods described above, you can maintain the selected item's highlight and ensure 'td' displays accurate details.

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