1 分析Log

04-11 10:41:41.591 1302 1302 E AndroidRuntime: android.os.FileUriExposedException: file:///storage/emulated/0/Android/data/com.android.mms/cache/.temp0.3gp exposed beyond app through Intent.getData()

04-11 10:41:41.591  1302  1302 E AndroidRuntime: at android.os.StrictMode.onFileUriExposed(StrictMode.java:1960)

04-11 10:41:41.591  1302  1302 E AndroidRuntime: at android.net.Uri.checkFileUriExposed(Uri.java:2356)

04-11 10:41:41.591  1302  1302 E AndroidRuntime: at android.content.Intent.prepareToLeaveProcess(Intent.java:9881)

04-11 10:41:41.591  1302  1302 E AndroidRuntime: at android.content.Intent.prepareToLeaveProcess(Intent.java:9835)

04-11 10:41:41.591  1302  1302 E AndroidRuntime: at android.app.Instrumentation.execStartActivity(Instrumentation.java:1612)

04-11 10:41:41.591  1302  1302 E AndroidRuntime: at android.app.Activity.startActivityForResult(Activity.java:4501)

04-11 10:41:41.591  1302  1302 E AndroidRuntime: at android.app.Activity.startActivityForResult(Activity.java:4459)

04-11 10:41:41.591  1302  1302 E AndroidRuntime: at com.android.mms.ui.ComposeMessageActivity.startActivityForResult(ComposeMessageActivity.java:934)

04-11 10:41:41.591  1302  1302 E AndroidRuntime: at android.app.Activity.startActivity(Activity.java:4820)

04-11 10:41:41.591  1302  1302 E AndroidRuntime: at android.app.Activity.startActivity(Activity.java:4788)

04-11 10:41:41.591  1302  1302 E AndroidRuntime: at com.android.mms.ui.MessageUtils.viewSimpleSlideshow(MessageUtils.java:1224)

04-11 10:41:41.591  1302  1302 E AndroidRuntime: at com.android.mms.ui.ComposeMessageActivity.viewMmsMessageAttachment(ComposeMessageActivity.java:682)

04-11 10:41:41.591  1302  1302 E AndroidRuntime: at com.android.mms.ui.ComposeMessageActivity.-wrap68(Unknown Source:0)

04-11 10:41:41.591  1302  1302 E AndroidRuntime: at com.android.mms.ui.ComposeMessageActivity$1.handleMessage(ComposeMessageActivity.java:642)

04-11 10:41:41.591  1302  1302 E AndroidRuntime: at android.os.Handler.dispatchMessage(Handler.java:106)

04-11 10:41:41.591  1302  1302 E AndroidRuntime: at android.os.Looper.loop(Looper.java:164)

04-11 10:41:41.591  1302  1302 E AndroidRuntime: at android.app.ActivityThread.main(ActivityThread.java:6518)

04-11 10:41:41.591  1302  1302 E AndroidRuntime: at java.lang.reflect.Method.invoke(Native Method)

04-11 10:41:41.591  1302  1302 E AndroidRuntime: at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)

04-11 10:41:41.591  1302  1302 E AndroidRuntime: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)

04-11 10:41:41.603  1246  765 D ActivityTrigger: ActivityTrigger activityPauseTrigger

2 定位原因，经过查资料发现

android 8.0 的版本：当把targetSdkVersion指定成24及之上并且在API>=24的设备上运行时。这种方式则会出现FileUriExposedException异常

原因

Android 8.0的系统对权限的管理更加严格

不在让其他app可以访问另外一个apk的中把file://Uri（主要是权限问题，如文件是私有的，没有权限无法访问），通过过谷歌文档，google提供了FileProvider，发现通过Intent或ClipData 等方法可以规避。由于需要运行中的权限

如果接收访问app 的file://Uri没有申请READ_EXTERNAL_STORAGE权限，在查看文件会让APP 挂掉。

3 解决方法

1.在AndroidManifest中添加provider节点

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    package="apk 的包名"

<provider

    android:name="android.support.v4.content.FileProvider"

    android:authorities="apk的包名.fileprovider"

    android:exported="false"

    android:grantUriPermissions="true">

     <meta-data

             android:name="android.support.FILE_PROVIDER_PATHS"

             android:resource="@xml/provider_paths" />

</provider>

</manifest>

2 2.在res的xml目录下创建provider_paths

<?xml version="1.0" encoding="utf-8"?>

<pathsxmlns:android="http://schemas.android.com/apk/res/android">

<external-path path="Android/data/app的包名/" name="files_root"

>  </paths>

TIPS 

如果要共享的文件在SD卡上可以这样写

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

或者在某个目录下可以这样写

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

3.修改代码（最重要的地方，定位出问题的代码位置）

Intent intent = new Intent();

intent.setAction("android.intent.action.VIEW");

Uri videoUri;if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {    

//申请权限  

  intent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);

//getUriForFile的第二个参数就是Manifest中的authorities  

  videoUri = FileProvider.getUriForFile(context,"apk的包名.FileProvider", file);} 

else {  

  videoUri = Uri.fromFile(file);

}

intent.setDataAndType(videoUri,"video/*");

context.startActivity(intent);

4 搞定