这段文字将在5秒内消失。

    final Toast toast = Toast.makeText(getApplicationContext(), "My Text", Toast.LENGTH_SHORT);
    toast.show();

    Handler handler = new Handler();
        handler.postDelayed(new Runnable() {
           @Override
           public void run() {
               toast.cancel(); 
           }
    }, 5000); // Change to what you want

编辑: 正如Itai Spector在评论中所说，它将显示约3.5秒，所以使用以下代码:

    int toastDuration = 5000; // in MilliSeconds
    Toast mToast = Toast.makeText(this, "My text", Toast.LENGTH_LONG);
    CountDownTimer countDownTimer;
    countDownTimer = new CountDownTimer(toastDuration, 1000) {
        public void onTick(long millisUntilFinished) {
            mToast.show();
        }

        public void onFinish() {
            mToast.cancel();
        }
    };

    mToast.show();
    countDownTimer.start();

不，这里列出的大多数/所有黑客都不再适用于android 9。但有一个更好的解决方案:如果你的消息需要挂着，使用对话框。

(new AlertDialog.Builder(this)).setTitle("Sorry!")
.setMessage("Please let me know by posting a beta comment on the play store .")
.setPositiveButton("OK", null).create().show();

为此，我编写了一个辅助类。你可以在github上看到代码:https://github.com/quiqueqs/Toast-Expander/blob/master/src/com/thirtymatches/toasted/ToastedActivity.java

这是你如何在5秒(或5000毫秒)内显示祝酒词:

Toast aToast = Toast.makeText(this, "Hello World", Toast.LENGTH_SHORT);
ToastExpander.showFor(aToast, 5000);

一个自定义背景和视图的祝酒词对我来说很管用。我在nexus 7平板电脑上测试了它，我注意到在循环过程中没有淡入淡出动画。实现如下:

public static void customToast(Context context, String message, int duration) {

    for (int i = 0; i < duration; i++) {
        Toast toast = new Toast(context);
        toast.setDuration(Toast.LENGTH_LONG);
        toast.setGravity(Gravity.CENTER, 0, 0);
        LayoutInflater inflater = (LayoutInflater) context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View view = inflater.inflate(R.layout.toast_layout, null);
        TextView textViewToast = (TextView) view
                .findViewById(R.id.textViewToast);
        textViewToast.setText(message);
        toast.setView(view);
        toast.show();
    }

}

下面是上面代码中使用的自定义textview:

<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/textViewToast"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/fragment_background"
android:padding="8dp"
android:text="Large Text"
android:textAppearance="?android:attr/textAppearanceLarge"
android:textColor="@color/blue" />

@drawable/fragment_background正在使我的吐司有圆角，就像kitkat版本一样。您还可以在该文件中添加其他视图。任何改进和评论的修改都是鼓励的，因为我计划在我的live应用程序中实现这一点。

将吐司设置为以毫秒为单位的特定时间段:

public void toast(int millisec, String msg) {
    Handler handler = null;
    final Toast[] toasts = new Toast[1];
    for(int i = 0; i < millisec; i+=2000) {
        toasts[0] = Toast.makeText(this, msg, Toast.LENGTH_SHORT);
        toasts[0].show();
        if(handler == null) {
            handler = new Handler();
            handler.postDelayed(new Runnable() {
                @Override
                public void run() {
                    toasts[0].cancel();
                }
            }, millisec);
        }
    }
}

在所有可用的解决方案都失败后，我最终使用递归解决了问题。

代码:

//Recursive function, pass duration in seconds
public void showToast(int duration) {
    if (duration <= 0)
        return;

    Toast.makeText(this, "Hello, it's a toast", Toast.LENGTH_LONG).show();
    Handler handler = new Handler();
    handler.postDelayed(new Runnable() {
        @Override
        public void run() {
            showToast(duration-1);
        }
    }, 1000);
}