一、背景
之前的保存图片吧,在Android11之前,我会去申请WIRITE权限,11之后,我又去申请MANAGE_EXTERNAL_STORAGE这个权限,该权限将授权读写所有共享存储内容,这也将同时包含非媒体类型的文件。但是在google上架的时候,MANAGE_EXTERNAL_STORAGE属于敏感权限,需要向谷歌做声明,做了,没过,谷歌说可以不要这个权限也可以保存,看来是我无知了,于是去研究了一下下,有了下面的方法。
二、实现
@SuppressLint("UseCompatLoadingForDrawables")
@AfterPermissionGranted(200)
fun saveFreshAppImageToGallery(context: PreViewActivity, imageResId: Int) {
val drawable = context.getDrawable(imageResId)
if (drawable is BitmapDrawable) {
val bitmap = drawable.bitmap
val displayName = "${System.currentTimeMillis()}.jpg"
val values = ContentValues().apply {
put(MediaStore.Images.Media.DISPLAY_NAME, displayName)
put(MediaStore.Images.Media.MIME_TYPE, "image/jpeg")
put(MediaStore.Images.Media.DATE_ADDED, System.currentTimeMillis() / 1000)
}
val contentResolver = context.contentResolver
val collection =
MediaStore.Images.Media.getContentUri(MediaStore.VOLUME_EXTERNAL_PRIMARY)
val item = contentResolver.insert(collection, values)
item?.let { uri ->
try {
val outputStream = contentResolver.openOutputStream(uri)
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, outputStream)
outputStream?.close()
Toast.makeText(context, "Save successfully!", Toast.LENGTH_SHORT).show()
val mediaScanIntent = Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE)
mediaScanIntent.data = uri
context.sendBroadcast(mediaScanIntent)
} catch (e: Exception) {
Toast.makeText(context, "Save Failed!", Toast.LENGTH_SHORT).show()
e.printStackTrace()
}
}
}
}
其中:通知相册刷新的逻辑是下面代码
val mediaScanIntent = Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE)
mediaScanIntent.data = uri
context.sendBroadcast(mediaScanIntent)
或者下面的方法
private fun saveToGallery(photoFile: File) {
val contentValues = ContentValues().apply {
put(MediaStore.Images.Media.DISPLAY_NAME, "photo.jpg")
put(MediaStore.Images.Media.MIME_TYPE, "image/jpeg")
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
put(MediaStore.Images.Media.IS_PENDING, 1)
}
}
val contentResolver = contentResolver
val collectionUri = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
MediaStore.Images.Media.getContentUri(MediaStore.VOLUME_EXTERNAL_PRIMARY)
} else {
MediaStore.Images.Media.EXTERNAL_CONTENT_URI
}
val imageUri = contentResolver.insert(collectionUri, contentValues)
imageUri?.let { uri ->
try {
contentResolver.openOutputStream(uri)?.use { outputStream ->
val inputStream = FileInputStream(photoFile)
inputStream.copyTo(outputStream)
inputStream.close()
outputStream.close()
}
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
contentValues.clear()
contentValues.put(MediaStore.Images.Media.IS_PENDING, 0)
contentResolver.update(uri, contentValues, null, null)
}
} catch (e: IOException) {
}
}
}
原理都是一样的