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); builder. setpositivebutton ("OK", buttononclick); builder. setnegativebutton ("cancel", buttononclick); builder. show ();} private class buttononclick implements dialoginterface. onclicklistener {private int index; // indicates the option index public buttononclick (INT index) {This. index = ind Ex ;}@ override public void onclick (dialoginterface diich, int which) {// which indicates the clicked button index. All option indexes are greater than 0, and the button indexes are smaller than 0. I

In Android, the Spinner is the automatically displayed style of the drop-down menu and AutoCompleteTextView. It is equivalent to the The Spinner Widget drop-down menu and AutoCompleteTextView provided in Android are very easy to use and style is also applicable,However, we can change the style of the drop-down menu by defining xml.Create an xml file in the layout directory with the name (activity_main.xml )

--- Restore content start --- I. Previous Code 2. Create a New View resource in the drop-down list, that is, the TextView of each Item. we name it dropdown. xml and place it in drawable. The code is: 3. Create an Adapter Here we will introduce two functions: 1. ArrayAdapter. ArrayAdapter (Context context, int textViewResourcId, List We can use it to create a new Adapter object. Three parameters are requi

You can use a spinner to implement a drop-down list box and then select it from the drop-down list box. Defines an array used as the data source of the spinner. Define a spinner

Main implementation: Dynamically load all levels drop-down values of the adapterIn the listen to this level drop-down box, when the selected value of this level drop-down box changes, the binding value of the subordinate adapter is modified with itXML layout:Implementation code:Package Com.example.android.demo.spinner;import Android.os.bundle;import Android.app.activity;import Android.view.view;import Andro

This article describes the implementation of the list selection box. Shows the program running effect: The main. xml content of the main layout file is as follows: