How to trigger a custom dialog in Android?

In Android, you can create a custom dialog by following these steps:

1. Create a custom dialog layout file: Create an XML layout file in the res/layout directory to define the UI interface for the custom dialog. For example, create a layout file named dialog_custom.xml.
2. Create a dialog box class: Create a custom dialog box class in Java code, inherit from the Dialog class, and override the constructor. Set the dialog box’s style, layout, and other attributes in the constructor.

public class CustomDialog extends Dialog {

    public CustomDialog(Context context) {
        super(context);
        // 设置自定义对话框的样式
        getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
        setContentView(R.layout.dialog_custom);
    }
}

1. To use a custom dialog in an Activity: Instantiate a custom dialog class in the Activity where you want to display the dialog, then call the show() method to display the dialog.

CustomDialog customDialog = new CustomDialog(this);
customDialog.show();

By following the above steps, you can create a custom dialog in Android.