Android 10 java.io.FileNotFoundException

实际上是 Android Q分区存储权限变更及适配 问题

代码：

Bitmap bitmap = BitmapFactory.decodeStream(getContentResolver().openInputStream(uri));

BitmapFactory: Unable to decode stream: java.io.FileNotFoundException: /storage/emulated/0/DCIM/Camera/IMG_20191220_173241.jpg: open failed: EACCES (Permission denied)

解决办法：android\app\src\main\AndroidManifest.xml

<application android:requestLegacyExternalStorage="true"></application>

Android 10权限参考链接
干货 | 携程 Android 10适配踩坑指南
Android 10工件映射表