Android应用程序名称未显示在多任务屏幕中 [英] Android App name is not displayed in the multitasking screen

问题描述

我已经开发了一个简单的NFC应用程序，该应用程序读取并显示NFC标签中存在的数据(NDEF记录).我修改了清单文件，以便每当点击标签时，我的应用程序便会打开.

现在的问题是，当我手动打开应用程序并检查多任务屏幕时，它显示了我的应用程序名称，即NFCReader，但是当标签与设备接触时，当应用程序自身打开时，我的应用程序却被打开了，但是当我检查多任务屏幕，它不显示我的应用名称.而是显示NFC服务.我该怎么做才能克服这个问题?

解决方案

我假设您已将清单中的活动声明设置为类似以下内容:

<activity
     android:name=".packagename.MainActivity"
     android:alwaysRetainTaskState="true"
     android:launchMode="singleTask"
     android:theme="@style/AppTheme.Main">
     <intent-filter>
         <action android:name="android.intent.action.MAIN" />
         <category android:name="android.intent.category.LAUNCHER" />
     </intent-filter>
     <intent-filter>
         <action android:name="android.nfc.action.NDEF_DISCOVERED" />
         <category android:name="android.intent.category.DEFAULT" />
         <data
             android:host="domain.com"
             android:scheme="http" />
     </intent-filter>
</activity>

我认为您的问题的答案是您忘记添加的以下代码行: android:launchMode="singleTask"

我邀请您阅读有关启动模式的信息此处和此处.

请注意::此答案基于 answer .

希望这会有所帮助！

I've developed a simple NFC application that reads and displays the data(NDEF Records) present in the NFC tag. I modified the Manifest file so that whenever a tag gets tapped, my app gets opened.

Now the problem is when I manually open the app and check the multitasking screen, it displays my app name i.e NFCReader but when the app gets opened itself when a tag comes in contact with the device, my app gets opened but when I check the multitasking screen, it doesn't display my app name. Instead it displays NFC Service. What should I do to overcome this issue?

解决方案

I assume that you have set your activity declaration, in your manifest, to something like this:

<activity
     android:name=".packagename.MainActivity"
     android:alwaysRetainTaskState="true"
     android:launchMode="singleTask"
     android:theme="@style/AppTheme.Main">
     <intent-filter>
         <action android:name="android.intent.action.MAIN" />
         <category android:name="android.intent.category.LAUNCHER" />
     </intent-filter>
     <intent-filter>
         <action android:name="android.nfc.action.NDEF_DISCOVERED" />
         <category android:name="android.intent.category.DEFAULT" />
         <data
             android:host="domain.com"
             android:scheme="http" />
     </intent-filter>
</activity>

I think the answer to your question is the following line of code that you forgot to add: android:launchMode="singleTask"

I invite you to read about launch modes here and here.

Please note: This answer is based on the use of Reader mode API, otherwise check this answer.

Hope this helps!

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