安卓自定义通知不显示[英] Android Custom Notification doesn't Display

本文是小编为大家收集整理的关于安卓自定义通知不显示的处理/解决方法,可以参考本文帮助大家快速定位并解决问题,中文翻译不准确的可切换到English标签页查看源文。

问题描述

我无法遇到与自定义布局显示的通知.如果我使用以下(旧)代码:

notification = new Notification();
notification.icon = R.drawable.icon;
notification.tickerText = currentTickerText;
notification.when = System.currentTimeMillis();
notification.setLatestEventInfo(context, (CharSequence)currentTitle, (CharSequence)"", pendingIntent);

一切按预期工作,通知显示出来.但是,如果我使用以下(新)代码:

contentView = new RemoteViews(context.getPackageName(), R.layout.service_notification);
contentView.setImageViewResource(R.id.image, R.drawable.icon);
contentView.setTextViewText(R.id.title, (CharSequence)currentTitle);
contentView.setTextViewText(R.id.text, (CharSequence)"");
contentView.setViewVisibility(R.id.pgStatus, View.GONE);

notification = new Notification();
notification.tickerText = currentTickerText;
notification.when = System.currentTimeMillis();

notification.contentView = contentView;
notification.contentIntent = pendingIntent;

通知永远不会显示.我没有给出错误,所以我真的不确定寻找问题的地方.以下是service_notification布局代码:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/layout"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:padding="10dp" >
    <ImageView android:id="@+id/image"
        android:layout_width="wrap_content"
        android:layout_height="fill_parent"
        android:layout_alignParentLeft="true"
        android:layout_marginRight="10dp" />
    <TextView android:id="@+id/title"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_toRightOf="@id/image"
        android:text="This is the title."
        style="@style/NotificationTitle" />
    <TextView android:id="@+id/text"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_toRightOf="@id/image"
        android:layout_below="@id/title"
        android:text="This is the status"
        style="@style/NotificationText" />
    <ProgressBar
        android:id="@+id/pgStatus"
        style="?android:attr/progressBarStyleHorizontal"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/text"
        android:layout_toRightOf="@+id/image" />
</RelativeLayout>

此外,我在android 2.2仿真器上运行它,如果这会有所不同.

任何人都对可能是错误的任何想法或如何追踪问题的方法?我有点损失,因为我没有错误的消息来解决问题.谢谢!

推荐答案

状态栏通知需要以下所有内容:

  • 状态栏的图标
  • 标题和消息,除非您定义自定义通知布局
  • 一个挂起,在选择通知时被解雇

状态栏通知 - 创建通知

您未指定图标,这意味着您的通知无效.

(但是,在框架方面对此情况没有适当的错误消息/异常而言,这是不好的)


编辑:刚刚测试过这一点,我可以从Android 2.2上的评论中确认"不可见"通知.它适用于2.3.3.似乎你偶然发现了超过一个错误已在此处修复.

有问题的线对我来说是如下:

contentView.setViewVisibility(R.id.pgStatus, View.GONE);

如果我评论出来,一切都有效.当我在XML布局中添加android:visibility="gone"到ProgressBar时,它也有效,这基本上存在效果.但是一旦我打电话给栏上的setViewVisibility(),一切都崩溃了.

所以我推荐从BugTracker注释中的解决方法,将ProgressBar包装到LinearLayout并更改该方法的可见性.

本文地址:https://www.itbaoku.cn/post/102362.html

问题描述

I'm having trouble getting a notification with a custom layout to display. If I use the following (old) code:

notification = new Notification();
notification.icon = R.drawable.icon;
notification.tickerText = currentTickerText;
notification.when = System.currentTimeMillis();
notification.setLatestEventInfo(context, (CharSequence)currentTitle, (CharSequence)"", pendingIntent);

Everything works as expected and the notification shows up. However if I use the following (new) code:

contentView = new RemoteViews(context.getPackageName(), R.layout.service_notification);
contentView.setImageViewResource(R.id.image, R.drawable.icon);
contentView.setTextViewText(R.id.title, (CharSequence)currentTitle);
contentView.setTextViewText(R.id.text, (CharSequence)"");
contentView.setViewVisibility(R.id.pgStatus, View.GONE);

notification = new Notification();
notification.tickerText = currentTickerText;
notification.when = System.currentTimeMillis();

notification.contentView = contentView;
notification.contentIntent = pendingIntent;

The notification is never shown. I'm not given an error either so I'm not really sure where to look for an issue. Here is the service_notification layout code:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/layout"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:padding="10dp" >
    <ImageView android:id="@+id/image"
        android:layout_width="wrap_content"
        android:layout_height="fill_parent"
        android:layout_alignParentLeft="true"
        android:layout_marginRight="10dp" />
    <TextView android:id="@+id/title"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_toRightOf="@id/image"
        android:text="This is the title."
        style="@style/NotificationTitle" />
    <TextView android:id="@+id/text"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_toRightOf="@id/image"
        android:layout_below="@id/title"
        android:text="This is the status"
        style="@style/NotificationText" />
    <ProgressBar
        android:id="@+id/pgStatus"
        style="?android:attr/progressBarStyleHorizontal"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/text"
        android:layout_toRightOf="@+id/image" />
</RelativeLayout>

Also, I'm running this on the Android 2.2 emulator if that makes a difference.

Anyone have any ideas of what could be wrong or how I could go about tracking down the issue? I'm kind of at a loss since I don't have an error message to work off of. Thanks!

推荐答案

A status bar notification requires all of the following:

  • An icon for the status bar
  • A title and message, unless you define a custom notification layout
  • A PendingIntent, to be fired when the notification is selected

from Status Bar Notifications - Creating Notifications

You don't specify an icon, which means your notification is not valid.

(But yes, it's bad on the framework side that there is no proper error message/exception for this case)


Edit: Just tested this through and I can confirm the "invisible" notification from the comment on Android 2.2. It works on 2.3.3., seems like you stumbled over a bug that has been fixed in the meantime.

The problematic line is the following for me:

contentView.setViewVisibility(R.id.pgStatus, View.GONE);

If I comment that out, everything works. It also works when I add android:visibility="gone" to the ProgressBar in the XML layout, which has basically the same effect. But as soon as I call setViewVisibility() on the bar, everything breaks apart.

So I'd recommend the workaround from the bugtracker comments, wrap the ProgressBar into a LinearLayout and change the visibility of that instead.