我看了一下这样的问题在这里，但答案似乎并不奏效。

I have read about this kind of problem here but the answers don't seem to be working.

我表现出吐司当用户点击一个按钮。当用户continously点击吐司不断连连即使当用户退出活动

I show a Toast when user clicks a button. When the user continously clicks the button the toast keeps on being displayed again and again even when the user exits the activity.

敬酒的长度短。敬酒的长度不能改变文本较长。

The length of the toast is short. Length of the toast cannot be changed as the text is long.

这是我曾尝试截至目前：

This is what i have tried as of now:

    Toast toast;
    toast=Toast.makeText(getApplicationContext(),"text",Toast.LENGTH_SHORT);
    if(toast.getView().isShown()==false){
         toast.show();
    }

这没有奏效。

我想：

    if(toast.getView().isShown()==true){            
        toast.cancel();
    }

在的onStop（）。出于某种原因取消方法不会工作的。

in the onStop(). For some reason the cancel method never works.

如果我把 .cancel（）我展示应用程序之前......那么将是另一个空检查了点。但是这样做在那之后也没有奏效。我可以显示一个对话框，而不是祝酒但不会是一个解决办法。

If i put the .cancel() before i show the app... then there would be another null check for that. But after doing that also it did not work. I can show a dialog box instead of a toast but that would not be a solution.

有没有什么办法来检查是否显示或不敬酒的？

Is there any way to check whether a toast is being displayed or not?

有关引用

吐司消息在Android的

how为避免敬酒消息的android，如果敬酒的消息已经在运行

如何prevent多吐司重叠

Cancelling并且已经打开土司的Andr​​oid

推荐答案

关键是要跟踪的最后吐司结果表明，并取消之一。

The trick is to keep track of the last Toast that was shown, and to cancel that one.

我所做的是创建一个吐司包装，包含静态引用到最后吐司显示出来。

What I have done is to create a Toast wrapper, that contains a static reference to the last Toast displayed.

当我需要展示一个新的，我第一次取消了静态引用，显示出新的（并保存在静态）之前。

When I need to show a new one, I first cancel the static reference, before showing the new one (and saving it in the static).

这里的夸包装我做了充分code - 它模仿足够的面包的方法，我用它。默认情况下，夸将取消previous之一，这样你就不会建立起来敬酒等待显示的队列。

Here's full code of the Boast wrapper I made - it mimics enough of the Toast methods for me to use it. By default the Boast will cancel the previous one, so you don't build up a queue of Toasts waiting to be displayed.

如果你只是想知道如何取消通知，退出你的应用程序的时候，你会发现很多的帮助下在那里。

If you just want to know how to cancel the notifications when exiting your app, you will find lots of help in there.

顺便说一句 - 这应该是一个直接的简易替换为吐司 在大多数情况下使用

BTW - this should be a direct drop-in replacement for Toast in most use cases.

package com.mobiRic.ui.widget;

import android.annotation.SuppressLint;
import android.content.Context;
import android.content.res.Resources;
import android.widget.Toast;

/**
 * {@link Toast} decorator allowing for easy cancellation of notifications. Use
 * this class if you want subsequent Toast notifications to overwrite current
 * ones. </p>
 * 
 * By default, a current {@link Boast} notification will be cancelled by a
 * subsequent notification. This default behaviour can be changed by calling
 * certain methods like {@link #show(boolean)}.
 */
public class Boast
{
    /**
     * Keeps track of certain {@link Boast} notifications that may need to be cancelled.
     * This functionality is only offered by some of the methods in this class.
     */
    private volatile static Boast globalBoast = null;

    // ////////////////////////////////////////////////////////////////////////////////////////////////////////

    /**
     * Internal reference to the {@link Toast} object that will be displayed.
     */
    private Toast internalToast;

    // ////////////////////////////////////////////////////////////////////////////////////////////////////////

    /**
     * Private constructor creates a new {@link Boast} from a given
     * {@link Toast}.
     * 
     * @throws NullPointerException
     *         if the parameter is <code>null</code>.
     */
    private Boast(Toast toast)
    {
        // null check
        if (toast == null)
        {
            throw new NullPointerException(
                "Boast.Boast(Toast) requires a non-null parameter.");
        }

        internalToast = toast;
    }

    // ////////////////////////////////////////////////////////////////////////////////////////////////////////

    /**
     * Make a standard {@link Boast} that just contains a text view.
     * 
     * @param context
     *        The context to use. Usually your {@link android.app.Application}
     *        or {@link android.app.Activity} object.
     * @param text
     *        The text to show. Can be formatted text.
     * @param duration
     *        How long to display the message. Either {@link #LENGTH_SHORT} or
     *        {@link #LENGTH_LONG}
     */
    @SuppressLint("ShowToast")
    public static Boast makeText(Context context, CharSequence text,
        int duration)
    {
        return new Boast(Toast.makeText(context, text, duration));
    }

    /**
     * Make a standard {@link Boast} that just contains a text view with the
     * text from a resource.
     * 
     * @param context
     *        The context to use. Usually your {@link android.app.Application}
     *        or {@link android.app.Activity} object.
     * @param resId
     *        The resource id of the string resource to use. Can be formatted
     *        text.
     * @param duration
     *        How long to display the message. Either {@link #LENGTH_SHORT} or
     *        {@link #LENGTH_LONG}
     * 
     * @throws Resources.NotFoundException
     *         if the resource can't be found.
     */
    @SuppressLint("ShowToast")
    public static Boast makeText(Context context, int resId, int duration)
        throws Resources.NotFoundException
    {
        return new Boast(Toast.makeText(context, resId, duration));
    }

    /**
     * Make a standard {@link Boast} that just contains a text view. Duration
     * defaults to {@link #LENGTH_SHORT}.
     * 
     * @param context
     *        The context to use. Usually your {@link android.app.Application}
     *        or {@link android.app.Activity} object.
     * @param text
     *        The text to show. Can be formatted text.
     */
    @SuppressLint("ShowToast")
    public static Boast makeText(Context context, CharSequence text)
    {
        return new Boast(Toast.makeText(context, text, Toast.LENGTH_SHORT));
    }

    /**
     * Make a standard {@link Boast} that just contains a text view with the
     * text from a resource. Duration defaults to {@link #LENGTH_SHORT}.
     * 
     * @param context
     *        The context to use. Usually your {@link android.app.Application}
     *        or {@link android.app.Activity} object.
     * @param resId
     *        The resource id of the string resource to use. Can be formatted
     *        text.
     * 
     * @throws Resources.NotFoundException
     *         if the resource can't be found.
     */
    @SuppressLint("ShowToast")
    public static Boast makeText(Context context, int resId)
        throws Resources.NotFoundException
    {
        return new Boast(Toast.makeText(context, resId, Toast.LENGTH_SHORT));
    }

    // ////////////////////////////////////////////////////////////////////////////////////////////////////////

    /**
     * Show a standard {@link Boast} that just contains a text view.
     * 
     * @param context
     *        The context to use. Usually your {@link android.app.Application}
     *        or {@link android.app.Activity} object.
     * @param text
     *        The text to show. Can be formatted text.
     * @param duration
     *        How long to display the message. Either {@link #LENGTH_SHORT} or
     *        {@link #LENGTH_LONG}
     */
    public static void showText(Context context, CharSequence text, int duration)
    {
        Boast.makeText(context, text, duration).show();
    }

    /**
     * Show a standard {@link Boast} that just contains a text view with the
     * text from a resource.
     * 
     * @param context
     *        The context to use. Usually your {@link android.app.Application}
     *        or {@link android.app.Activity} object.
     * @param resId
     *        The resource id of the string resource to use. Can be formatted
     *        text.
     * @param duration
     *        How long to display the message. Either {@link #LENGTH_SHORT} or
     *        {@link #LENGTH_LONG}
     * 
     * @throws Resources.NotFoundException
     *         if the resource can't be found.
     */
    public static void showText(Context context, int resId, int duration)
        throws Resources.NotFoundException
    {
        Boast.makeText(context, resId, duration).show();
    }

    /**
     * Show a standard {@link Boast} that just contains a text view. Duration
     * defaults to {@link #LENGTH_SHORT}.
     * 
     * @param context
     *        The context to use. Usually your {@link android.app.Application}
     *        or {@link android.app.Activity} object.
     * @param text
     *        The text to show. Can be formatted text.
     */
    public static void showText(Context context, CharSequence text)
    {
        Boast.makeText(context, text, Toast.LENGTH_SHORT).show();
    }

    /**
     * Show a standard {@link Boast} that just contains a text view with the
     * text from a resource. Duration defaults to {@link #LENGTH_SHORT}.
     * 
     * @param context
     *        The context to use. Usually your {@link android.app.Application}
     *        or {@link android.app.Activity} object.
     * @param resId
     *        The resource id of the string resource to use. Can be formatted
     *        text.
     * 
     * @throws Resources.NotFoundException
     *         if the resource can't be found.
     */
    public static void showText(Context context, int resId)
        throws Resources.NotFoundException
    {
        Boast.makeText(context, resId, Toast.LENGTH_SHORT).show();
    }

    // ////////////////////////////////////////////////////////////////////////////////////////////////////////

    /**
     * Close the view if it's showing, or don't show it if it isn't showing yet.
     * You do not normally have to call this. Normally view will disappear on
     * its own after the appropriate duration.
     */
    public void cancel()
    {
        internalToast.cancel();
    }

    /**
     * Show the view for the specified duration. By default, this method cancels
     * any current notification to immediately display the new one. For
     * conventional {@link Toast#show()} queueing behaviour, use method
     * {@link #show(boolean)}.
     * 
     * @see #show(boolean)
     */
    public void show()
    {
        show(true);
    }

    /**
     * Show the view for the specified duration. This method can be used to
     * cancel the current notification, or to queue up notifications.
     * 
     * @param cancelCurrent
     *        <code>true</code> to cancel any current notification and replace
     *        it with this new one
     * 
     * @see #show()
     */
    public void show(boolean cancelCurrent)
    {
        // cancel current
        if (cancelCurrent && (globalBoast != null))
        {
            globalBoast.cancel();
        }

        // save an instance of this current notification
        globalBoast = this;

        internalToast.show();
    }

}