Android关闭对话5秒后？

I'm working on an accesibility app. When the user wants to leave the app I show a dialog where he has to confirm he wants to leave, if he doesn't confirm after 5 seconds the dialog should close automatically (since the user probably opened it accidentally). This is similar to what happens on Windows when you change the screen resolution (an alert appears and if you don't confirm it, it reverts to the previous configuration).

我正在开发一个辅助功能应用。当用户想要离开应用程序时,我会显示一个对话框,他必须确认他要离开,如果他在5秒后没有确认对话框应该自动关闭(因为用户可能会意外打开它)。这类似于更改屏幕分辨率时在Windows上发生的情况(出现警报,如果您不确认,则会恢复到之前的配置)。

This is how I show the dialog:

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();

How can I close the dialog 5 seconds after showing it?

如何在显示后5秒钟关闭对话框?

6 个解决方案

#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);

#2

Use CountDownTimer to achieve.

使用CountDownTimer来实现。

      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();

    new CountDownTimer(5000, 1000) {

        @Override
        public void onTick(long millisUntilFinished) {
            // TODO Auto-generated method stub

        }

        @Override
        public void onFinish() {
            // TODO Auto-generated method stub

            alert.dismiss();
        }
    }.start();

#3

This is the code, refer this link:

这是代码,请参考此链接:

public class MainActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        // get button
        Button btnShow = (Button)findViewById(R.id.showdialog);
        btnShow.setOnClickListener(new View.OnClickListener() {
            //on click listener
            @Override
            public void onClick(View v) {
                AlertDialog.Builder builder = new AlertDialog.Builder(v.getContext());
                builder.setTitle("How to close alertdialog programmatically");
                builder.setMessage("5 second dialog will close automatically");
                builder.setCancelable(true);

                final AlertDialog closedialog= builder.create();

                closedialog.show();

                final Timer timer2 = new Timer();
                timer2.schedule(new TimerTask() {
                    public void run() {
                        closedialog.dismiss(); 
                        timer2.cancel(); //this will cancel the timer of the system
                    }
                }, 5000); // the timer will count 5 seconds....

            }
        });
    }
}

HAPPY CODING!

#4

Late, but I thought this might be useful for anyone using RxJava in their application.

迟到了,但我认为这对于在他们的应用程序中使用RxJava的任何人都有用。

RxJava comes with an operator called .timer() which will create an Observable which will fire onNext() only once after a given duration of time and then call onComplete(). This is very useful and avoids having to create a Handler or Runnable.

RxJava带有一个名为.timer()的运算符,它将创建一个Observable,它将在给定的持续时间后触发onNext()一次,然后调用onComplete()。这非常有用,可以避免创建Handler或Runnable。

More information on this operator can be found in the ReactiveX Documentation

有关此运算符的更多信息,请参阅ReactiveX文档

// Wait afterDelay milliseconds before triggering call
Subscription subscription = Observable
        .timer(5000, TimeUnit.MILLISECONDS) // 5000ms = 5s
        .observeOn(AndroidSchedulers.mainThread())
        .subscribe(new Action1<Long>() {
            @Override
            public void call(Long aLong) {
                // Remove your AlertDialog here
            }
        });

You can cancel behavior triggered by the timer by unsubscribing from the observable on a button click. So if the user manually closes the alert, call subscription.unsubscribe() and it has the effect of canceling the timer.

您可以通过在按钮单击时从observable取消订阅来取消计时器触发的行为。因此,如果用户手动关闭警报,请调用subscription.unsubscribe(),它具有取消计时器的效果。

#5

AlertDialog alertDialog = new AlertDialog.Builder(MainActivity.this).create();

then call dismiss meth it work

然后调用dismiss meth它工作

alertDialog .dismiss(); 

#6

I added automatic dismiss with the time remaining shown in the positive button text to an AlertDialog.

我将自动消除添加了正向按钮文本中显示的剩余时间到AlertDialog。

AlertDialog dialog = new AlertDialog.Builder(getContext())
        .setTitle(R.string.display_locked_title)
        .setMessage(R.string.display_locked_message)
        .setPositiveButton(R.string.button_dismiss, null)
        .create();

dialog.setOnShowListener(new DialogInterface.OnShowListener() {
    @Override
    public void onShow(DialogInterface dialog) {
        final Button positiveButton = ((AlertDialog) dialog).getButton(AlertDialog.BUTTON_POSITIVE);
        final CharSequence positiveButtonText = positiveButton.getText();
        new CountDownTimer(AUTO_DISMISS_MILLIS, 100) {
            @Override
            public void onTick(long millisUntilFinished) {
                positiveButton.setText(String.format(Locale.getDefault(), "%s (%d)",
                        positiveButtonText,
                        TimeUnit.MILLISECONDS.toSeconds(millisUntilFinished) + 1));
            }

            @Override
            public void onFinish() {
                dismiss();
            }
        }.start();

    }
});