Android 不推荐使用Environment.getExternalStorageDirectory（）

我想从手机存储器中获取目录 这是我的代码：

//"storage/emulated/0"
public String ROOT_DIR = Environment.getExternalStorageDirectory().getPath();
public String PICTURES = ROOT_DIR + "/Pictures";
public String CAMERA = ROOT_DIR + "/DCIM/camera";

}

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我可以用什么来代替方法“getExternalStorageDirectory（）”？

在api 29中，您需要使用

ContentResolver

，请参阅我的问题：

要从internet保存图像，您需要使用以下选项：

val url = URL(uRL)
val urlConnection = url.openConnection() as HttpURLConnection
urlConnection.requestMethod = "GET"
urlConnection.doOutput = true
urlConnection.readTimeout = 60000
urlConnection.connectTimeout = 20000
urlConnection.connect()
val fileName = "image.png"
val uri = insertToContentResolver(context, fileName, File(fileName).extension)
val outputStream = context.contentResolver.openOutputStream(uri)

val inputStream = urlConnection.inputStream

val buffer = ByteArray(1024)
var bufferLength: Int //used to store a temporary size of the buffer
while (inputStream.read(buffer).also { bufferLength = it } > 0) {
    outputStream.write(buffer, 0, bufferLength)
}
outputStream.close()



fun insertToContentResolver(
    context: Context,
    fileName: String,
    extension: String
): Uri? {
    val contentValues = ContentValues().apply {
        put(MediaStore.MediaColumns.DISPLAY_NAME, fileName)
        put(
            MediaStore.MediaColumns.MIME_TYPE,
            MimeTypeMap.getSingleton().getMimeTypeFromExtension(extension)
        )
        put(
            MediaStore.MediaColumns.DATA,
            File(
                "${Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES).absolutePath}/${
                    context.getString(R.string.folder_name)}",
                fileName
            ).absolutePath
        )


    }

    return context.contentResolver.insert(
        MediaStore.Files.getContentUri("external"),
        contentValues
    )
}

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它被弃用并不重要。这个函数完成它的工作。使用它。没有别的了。