Question

我正在尝试让我的应用创建通知，但此代码会给我编译错误：

public void makeRing(Context context, boolean notify)
    {

        if (notify)
        {
            NotificationCompat.Builder mBuilder =
                    new NotificationCompat.Builder(context)
                    //.setSmallIcon(R.drawable.notification_icon)
                    .setContentTitle("My notification")
                    .setContentText("Hello World!");
            // Creates an explicit intent for an Activity in your app
            Intent resultIntent = new Intent(context, MainActivity.class);

            // The stack builder object will contain an artificial back stack for the
            // started Activity.
            // This ensures that navigating backward from the Activity leads out of
            // your application to the Home screen.
            TaskStackBuilder stackBuilder = TaskStackBuilder.create(context);
            // Adds the back stack for the Intent (but not the Intent itself)
            stackBuilder.addParentStack(MainActivity.class);
            // Adds the Intent that starts the Activity to the top of the stack
            stackBuilder.addNextIntent(resultIntent);
            PendingIntent resultPendingIntent =
                    stackBuilder.getPendingIntent(
                        0,
                        PendingIntent.FLAG_UPDATE_CURRENT
                    );
            mBuilder.setContentIntent(resultPendingIntent);
            NotificationManager mNotificationManager =
                (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
            // mId allows you to update the notification later on (first number)
            mNotificationManager.notify(5954, mBuilder.build());

        }

这是直接从Android开发者网站获取的代码。错误位于“TaskStackBuilder stackBuilder = TaskStackBuilder.create（context）;”的行，其中create带有下划线，并且表示'方法create（Context）未定义为TaskStackBuilder类型。

另外，在最后一行中，build（）带有下划线，并且表示'NotificationCompat.Builder类型的方法build（）未定义。

我如何解决这些问题？

Answer 1

使用支持库时遇到了同样的问题。它似乎没有实现那些方法。以下是有效的代码：

NotificationCompat.Builder builder = new NotificationCompat.Builder(this)
        .setSmallIcon(R.drawable.ic_action_search)
        .setContentTitle("New search")
        .setContentText("Que hay de nuevo, viejo");
Intent resultIntent = new Intent(this, Temporal.class);
TaskStackBuilder stackBuilder = TaskStackBuilder.from(this);
stackBuilder.addParentStack(Temporal.class);
stackBuilder.addNextIntent(resultIntent);
PendingIntent resultPendingIntent = stackBuilder.getPendingIntent(0, PendingIntent.FLAG_UPDATE_CURRENT);
builder.setContentIntent(resultPendingIntent);
NotificationManager manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
manager.notify(112, builder.getNotification());

更改

TaskStackBuilder stackBuilder = TaskStackBuilder.from(this);

而不是

TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);

和

manager.notify(112, builder.getNotification());

而不是

manager.notify(112, mBuilder.build());

<强> EDITED

更好的解决方案：只需下载最新的Android支持库。

Answer 2

您可能尚未下载所需版本的支持库。您可以看到HERE所有版本，并找出您需要的版本。

我认为这是包含通知更改的最新版本：

支持包，修订版10（2012年8月）

v4支持库的更改：
    Added support for notification features introduced in Android 4.1 (API level 16) with additions to NotificationCompat.

但你可以下载最新的版本，只是为了确定。

尝试发出通知时出错

2 个答案: