Alert DialogBox in Android

The following is the source code, Now I will explain the preceding code in the following code sections for a better understanding. Code Section 1 In the preceding code, we set an OnClick event for the “Alert Type 1” button. This event will occur when a user clicks on the “Alert Type 1” button. In the preceding code, we create an object of the AlertDialog class using the Builder method. Then we set the title, message, and Icon for the Alert Dialog Box. Using the setButton method we set the type of button that will be shown in the dialog box. We also set an OnClick event for this button. When a person clicks on the “OK” button we will show some text using the Toast.makeText method. We can see that setButton is not showing in a proper way (crossed by a line). The reason is that the setButton method only works in older versions of an Android device. In the new version of Android devices, we use another method instead of setButton. When a person clicks on the “Alert Type 1” button, the following action will be performed. Code Section 2 This code will work the same as I explained in the previous code. Instead of a single button we use two buttons (Yes and No) and create an OnClick event for each button. Instead of the setButton method, we use the setPositiveButton method for showing the “Yes” option and the setNegativeButton method for showing the “No” option in the dialog box. Code Section 3 In the preceding code, we will show a ListView using a Dialog Box when someone clicks on the “Alter Type 3” button. In the preceding code, we create an array of string types and insert some data into this array. Using the inflate method of the getLayoutInflater class we get a reference for a menu_detail_fragment layout and insert it into a View type object. Then we get the reference of ListView into the lv object of ListView and bind the string array to a ListView using ArrayAdapter. Finally we create an OnClick event for ListView. Using this method we show the name of the list item, on which a user will click. Assume we click on item number three of the ListView then the output will be the following,