解决 Android N 上报错：android.os.FileUriExposedException: file:///storage/emulated/0/-优快云博客

本文介绍了如何在Android应用中正确配置和使用FileProvider来管理文件路径权限，确保应用能够安全地读写外部存储上的文件。

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http://blog.youkuaiyun.com/mr_orange_klj/article/details/69660225

1、在AndroidManifest.xml中添加如下代码

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    ...
    <application
        ...
        <provider
            android:name="android.support.v4.content.FileProvider"
            android:authorities="${applicationId}.provider"
            android:exported="false"
            android:grantUriPermissions="true">
            <meta-data
                android:name="android.support.FILE_PROVIDER_PATHS"
                android:resource="@xml/provider_paths"/>
        </provider>
    </application>
</manifest>

2、在res目录下新建一个xml文件夹，并且新建一个provider_paths的xml文件

<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
    <external-path name="external_files" path="."/>
</paths>

注意 external-path代表了不同的文件目录，一共有五种，下面是官网的说明：

<files-path name="name" path="path" />

Represents files in the files/ subdirectory of your app's internal storage area. This subdirectory is the same as the value returned by Context.getFilesDir().

代表了 Context.getFilesDir() .

<cache-path name="name" path="path" />

Represents files in the cache subdirectory of your app's internal storage area. The root path of this subdirectory is the same as the value returned by getCacheDir().

<external-path name="name" path="path" />

Represents files in the root of the external storage area. The root path of this subdirectory is the same as the value returned by Environment.getExternalStorageDirectory().

<external-files-path name="name" path="path" />

Represents files in the root of your app's external storage area. The root path of this subdirectory is the same as the value returned by Context#getExternalFilesDir(String) Context.getExternalFilesDir(null).

<external-cache-path name="name" path="path" />

Represents files in the root of your app's external cache area. The root path of this subdirectory is the same as the value returned by Context.getExternalCacheDir().

3、修改代码

Uri photoURI = Uri.fromFile(createImageFile());

变成：

Uri photoURI = FileProvider.getUriForFile(context, context.getApplicationContext().getPackageName() + ".provider", createImageFile());