Kotlin DialogFragment Example

Usage

1. Import project into Android Studio
2. Initliazing the DialogFragment fragment for your BaseActivity.kt

BaseActivity.kt

/**
 * Method which receives showAlertDialog request from other showAlertDialog() methods requested
 *
 * @param title                       The title to be displayed in the alert
 * @param message                     The message to be displayed in the alert
 * @param isCancelNeeded              Boolean to detect whether negative button needed
 * @param positiveButtonClickListener The listener for positive button click event
 * @param negativeButtonClickListener The listener for negative button click event
 * @param negativeButtonTitle         The title of negative button
 * @param positiveButtonTitle         The title of positive button
 */
    fun showAlertDialog(
            title: String?,
            message: String,
            isCancelNeeded: Boolean,
            positiveButtonClickListener: DialogInterface.OnClickListener?,
            negativeButtonClickListener: DialogInterface.OnClickListener?,
            negativeButtonTitle: String?,
            positiveButtonTitle: String?
        ) {
            try {
                removeExistingDialog()
                val alertDialogFragment = GeneralAlertDialogFragment.newInstance(
                    title,
                    message,
                    isCancelNeeded,
                    positiveButtonClickListener,
                    negativeButtonClickListener,
                    negativeButtonTitle,
                    positiveButtonTitle
                )
                alertDialogFragment.show(this.supportFragmentManager, LAConstant.ALERT_DIALOG_TAG)
            } catch (e: Exception) {
                LALog().e(TAG, "Base activity showAlertDialog: Caught exception: " + e.message, e)
            }
        }


/**
 * Shows alert dialog with message and also handles positive and negative button click events
 *
 * @param message                     The message to be displayed in the alert
 * @param positiveButtonClickListener The listener for positive button click event
 * @param negativeButtonClickListener The listener for negative button click event
 * @param negativeButtonTitle         The title of negative button
 * @param positiveButtonTitle         The title of positive button
 */
fun showAlertDialog(
    message: String,
    positiveButtonClickListener: DialogInterface.OnClickListener,
    negativeButtonClickListener: DialogInterface.OnClickListener,
    negativeButtonTitle: String,
    positiveButtonTitle: String
) {
    showAlertDialog(
        null,
        message,
        true,
        positiveButtonClickListener,
        negativeButtonClickListener,
        negativeButtonTitle,
        positiveButtonTitle
    )
}

/**
 * Shows alert dialog with title and message and also handles positive and negative button click events
 *
 * @param title                       The title to be displayed in the alert
 * @param message                     The message to be displayed in the alert
 * @param positiveButtonClickListener The listener for positive button click event
 * @param negativeButtonClickListener The listener for negative button click event
 * @param negativeButtonTitle         The title of negative button
 * @param positiveButtonTitle         The title of positive button
 */
fun showAlertDialog(
    title: String,
    message: String,
    positiveButtonClickListener: DialogInterface.OnClickListener,
    negativeButtonClickListener: DialogInterface.OnClickListener,
    negativeButtonTitle: String,
    positiveButtonTitle: String
) {
    showAlertDialog(
        title,
        message,
        true,
        positiveButtonClickListener,
        negativeButtonClickListener,
        negativeButtonTitle,
        positiveButtonTitle
    )
}

BaseFragment.kt

/**
 * Method to get base activity.
 *
 * @return Returns activity.
 */
fun getBaseActivity(): BaseActivity {
    return activity as BaseActivity
}


protected fun showAlertDialog(
    title: String?,
    message: String,
    isCancelNeeded: Boolean,
    positiveButtonClickListener: DialogInterface.OnClickListener?,
    negativeButtonClickListener: DialogInterface.OnClickListener?,
    negativeButtonTitle: String?,
    positiveButtonTitle: String?
) {
    val baseActivity = getBaseActivity()
    if (baseActivity != null) {
        baseActivity!!.showAlertDialog(
            title,
            message,
            isCancelNeeded,
            positiveButtonClickListener,
            negativeButtonClickListener,
            negativeButtonTitle,
            positiveButtonTitle
        )
    }
}

protected fun showAlertDialog(
    message: String,
    positiveButtonClickListener: DialogInterface.OnClickListener,
    negativeButtonClickListener: DialogInterface.OnClickListener
) {
    showAlertDialog(null, message, true, positiveButtonClickListener, negativeButtonClickListener, null, null)
}

/**
 * Method to show alert dialog with title, message and positive click listener
 *
 * @param title                       title of the alert dialog
 * @param message                     message of the alert dialog
 * @param positiveButtonClickListener click listener of positive click listener
 */
protected fun showAlertDialog(
    title: String,
    message: String,
    positiveButtonClickListener: DialogInterface.OnClickListener
) {
    showAlertDialog(title, message, false, positiveButtonClickListener, null, null, null)
}

protected fun showAlertDialog(message: String, positiveButtonClickListener: DialogInterface.OnClickListener) {
    showAlertDialog(null, message, false, positiveButtonClickListener, null, null, null)
}

/**
 * Method to show alert dialog with message
 *
 * @param message message to be displayed in alert dialog
 */
protected fun showAlertDialog(message: String) {
    showAlertDialog(null, message, false, null, null, null, null)
}

We can you used thought application in alert dialog fragment class is common.