需要 SecurityException NFC 权限 [英] SecurityException NFC permission required

问题描述

我一直在 Android 上进行一些 NFC 开发，但遇到了麻烦.我启动了应用程序，但它立即失败，并显示不幸的是，..... 已停止工作".

I have been doing some NFC development on android, and I have hit a brick wall. I launch the app and it immediatly fails with a "Unfortunately,..... has stopped working".

一些快速的谷歌搜索表明我需要将权限放在清单中.我这样做了，但是你瞧，我仍然遇到同样的错误！

Some quick googling showed I need the put the permission in the manifest. I did that, but lo and behold, I still get the same error!

这是我的清单的开始:

<application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >

    <uses-permission android:name="android.permission.NFC" />
    <uses-sdk android:minSdkVersion="10"/>
    <uses-feature android:name="android.hardware.nfc" android:required="true" />

    <activity
        android:name=".MainActivity"
    <!-- rest of the file --->

以及 logcat 中的输出:

And the output in logcat:

java.lang.RuntimeException: Unable to resume activity {za.co.fnb.ms.nfcreader/za.co.fnb.ms.nfcreader.MainActivity}: java.lang.SecurityException: NFC permission required: Neither user 10253 nor current process has android.permission.NFC.

我在这里做错了什么?

推荐答案

将这些添加到您使用 nfc 的活动中:

Add these to activities which you use nfc:

    <activity
        android:name="com.example.example.CLASSNAME"
        android:label="@string/app_name"
        android:theme="@android:style/Theme.NoTitleBar">

        <intent-filter>
            <action android:name="android.nfc.action.TAG_DISCOVERED"/>
        </intent-filter>

        <intent-filter>
            <action android:name="android.nfc.action.NDEF_DISCOVERED"/>  
            <data android:mimeType="mime/type" />
        </intent-filter>

        <meta-data android:name="android.nfc.action.TECH_DISCOVERED"
            android:resource="@xml/nfc_type"/>   

    </activity>

并且您还必须在应用程序标签之前定义权限.

And also you have to define permissions before application tag.

这篇关于需要 SecurityException NFC 权限的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！