这种方法对我有用
In Manifest
file
<application>
<provider
android:name="androidx.core.content.FileProvider"
android:authorities="com.example.android.provider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/file_paths">
</meta-data>
</provider>
...
</application
创建了一个文件/res/xml/file_paths.xml
并指定路径
<paths xmlns:android="http://schemas.android.com/apk/res/android">
<external-files-path name="my_images" path="Pictures" />
</paths>
In my activity
创建了一个全局变量var cameraPhotoFilePath: Uri? = null
这就是我开始相机活动以获取结果的方式
val intent = Intent(MediaStore.ACTION_IMAGE_CAPTURE)
val photoFile: File? = try {
createImageFileInAppDir()
} catch (ex: IOException) {
// Error occurred while creating the File
null
}
photoFile?.also { file ->
val photoURI: Uri = FileProvider.getUriForFile(
this,
"com.example.android.provider",
file
)
cameraPhotoFilePath = photoURI
intent.putExtra(MediaStore.EXTRA_OUTPUT, photoURI)
}
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION or Intent.FLAG_GRANT_WRITE_URI_PERMISSION)
startActivityForResult(intent, ACTION_REQUEST_CAMERA)
这是我在上面的代码中使用的辅助函数
@Throws(IOException::class)
private fun createImageFileInAppDir(): File {
val timeStamp: String = SimpleDateFormat("yyyyMMdd_HHmmss").format(Date())
val imagePath = getExternalFilesDir(Environment.DIRECTORY_PICTURES)
return File(imagePath, "JPEG_${timeStamp}_" + ".jpg")
}
最后在onActivityResult
这就是我获得图像 Uri 的方式
if (resultCode == RESULT_OK && requestCode == ACTION_REQUEST_CAMERA) {
cameraPhotoFilePath?.let { uri ->
// here uri is image Uri that was captured by camera
}
}