Differences between dismiss and cancel of alertdialog

First, use the cancel method source code and annotation.

  /**     * Cancel the dialog.  This is essentially the same as calling {@link #dismiss()}, but it will     * also call your {@link DialogInterface.OnCancelListener} (if registered).     */    public void cancel() {        if (!mCanceled && mCancelMessage != null) {            mCanceled = true;            // Obtain a new message so this dialog can be re-used            Message.obtain(mCancelMessage).sendToTarget();        }        dismiss();    }

The cancel dialog box is essentially the same as disimss. However, cancel executes the dialoginterface. oncancellistener listener, provided that it has been registered.

 

Public void opendialog (view v) {alertdialog dialog; alertdialog. builder = new alertdialog. builder (this); builder. settitle ("title"); builder. setmessage ("difference between dismiss and cancel"); builder. setpositivebutton ("OK", new dialoginterface. onclicklistener () {@ override public void onclick (dialoginterface dialog, int which) {dialog. cancel () ;}}); builder. setnegativebutton ("cancel", new dialoginterface. onclicklistener () {@ override public void onclick (dialoginterface dialog, int which) {dialog. dismiss () ;}}); dialog = builder. create (); dialog. setoncancellistener (New dialoginterface. oncancellistener () {@ override public void oncancel (dialoginterface DIALOG) {toast. maketext (mainactivity. this, "setoncancellistener", toast. length_short ). show () ;}}); dialog. show ();}

Click OK to execute dialoginterface. oncancellistener (). The toast and close dialog box is displayed.