Notification启动broadcast失败

最新推荐文章于 2024-01-03 17:29:36 发布

原创最新推荐文章于 2024-01-03 17:29:36 发布 · 323 阅读

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#android

本文介绍了一个技巧，通过在Android应用程序中使用FLAG_RECEIVER_FOREGROUND标志来提高Broadcast接收者的响应速度。此标志允许Broadcast接收者在前台优先级下运行，从而缩短了等待时间。适用于API 16及以上版本。

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手机启动后，后台broadcast满天飞。可能点击自己应用的Notification 启动的broadcast半天不响应。这时候加上FLAG_RECEIVER_FOREGROUND吧。注意此flag在API 16中引入.

示例:


Intent intent = new Intent(context, XXXReceiver.class);
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.JELLY_BEAN) {
            intent.addFlags(Intent.FLAG_RECEIVER_FOREGROUND);
        }
PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
...

注FLAG_RECEIVER_FOREGROUND的doc：


    /**
     * If set, when sending a broadcast the recipient is allowed to run at
     * foreground priority, with a shorter timeout interval.  During normal
     * broadcasts the receivers are not automatically hoisted out of the
     * background priority class.
     */
    public static final int FLAG_RECEIVER_FOREGROUND = 0x10000000;