java - 可显示的 Toast 数量有限制吗？

Question

在 MainActivity 中，我需要显示 getApplicationContext().fileList() 返回的所有文件，但只会显示大约前 50 个 Toast。

有一些限制吗？

String[] fileList = getApplicationContext().fileList();

Toast.makeText(getApplicationContext(), fileList.length + " files", Toast.LENGTH_LONG).show();

for (String fileName : fileList)
{
    Toast.makeText(getApplicationContext(), fileName, Toast.LENGTH_LONG).show();
}

谢谢

Answer 1

2023 年 2 月更新

一个新的limit Android 12 中添加了 5 个排队 toast，preventing to queue too many toasts .

// To limit bad UX of seeing a toast many seconds after if was triggered.
static final int MAX_PACKAGE_TOASTS = 5;

if (count >= MAX_PACKAGE_TOASTS) {
    Slog.e(TAG, "Package has already queued " + count
            + " toasts. Not showing more. Package=" + pkg);
    return;
}

还有previous limit of 50 toasts在 Android 10 中更改为 25。

static final int MAX_PACKAGE_NOTIFICATIONS = 25;

原始答案

是的，Toasts 会排队，并且限制为 50 个 Toasts，您可以在 NotificationManagerService 中查看检查情况。类

if (count >= MAX_PACKAGE_NOTIFICATIONS) {
    Slog.e(TAG, "Package has already posted " +
           + " toasts. Not showing more. Package=" + pkg);
    return;
}

并且 MAX_PACKAGE_NOTIFICATIONS 声明为

static final int MAX_PACKAGE_NOTIFICATIONS = 50;