Android 5秒后关闭对话框？

Question

我正在开发可访问性应用程序。当用户想要离开该应用程序时，我会显示一个对话框，在该对话框中他必须确认要离开，如果5秒钟后他仍未确认，则该对话框应自动关闭（因为用户可能意外打开了该对话框）。这类似于在Windows上更改屏幕分辨率时发生的情况（会出现警报，如果您没有确认，它将恢复为以前的配置）。

这是我显示对话框的方式：

AlertDialog.Builder dialog = new AlertDialog.Builder(this).setTitle("Leaving launcher").setMessage("Are you sure you want to leave the launcher?");
            dialog.setPositiveButton("Confirm", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int whichButton) {
                    exitLauncher();
                }
            });
            dialog.create().show();

显示对话框后5秒钟如何关闭对话框？

Answer 1

final AlertDialog.Builder dialog = new AlertDialog.Builder(this).setTitle("Leaving launcher").setMessage("Are you sure you want to leave the launcher?");
dialog.setPositiveButton("Confirm", new DialogInterface.OnClickListener() {
    @Override
    public void onClick(DialogInterface dialog, int whichButton) {
        exitLauncher();
    }
});     
final AlertDialog alert = dialog.create();
alert.show();

// Hide after some seconds
final Handler handler  = new Handler();
final Runnable runnable = new Runnable() {
    @Override
    public void run() {
        if (alert.isShowing()) {
            alert.dismiss();
        }
    }
};

alert.setOnDismissListener(new DialogInterface.OnDismissListener() {
    @Override
    public void onDismiss(DialogInterface dialog) {
        handler.removeCallbacks(runnable);
    }
});

handler.postDelayed(runnable, 10000);