Question

我正在开始学习将文件写入SD卡。但是，我需要一些澄清，因为我不明白为什么我在getAbsolutePath（）（由Android工作室检测到）中得到错误。

public class AndroidFileIO implements FileIO {
  Context context;
  AssetManager assets;
  String externalStoragePath;

public AndroidFileIO( Context context ) {
  this.context = context;
  this.assets = context.getAssets();
  this.externalStoragePath = Environment.getExternalStorageState().getAbsolutePath()
                  + File.separator;
}

谢谢，

Answer 1

更改此

this.externalStoragePath = Environment.getExternalStorageState().getAbsolutePath()
              + File.separator;

到

this.externalStoragePath = Environment.getExternalStorageDirectory().getAbsolutePath()
              + File.separator;

更多信息@

http://developer.android.com/guide/topics/data/data-storage.html#filesExternal

public static String getExternalStorageState () //返回类型是字符串

Added in API level 1
Returns the current state of the primary "external" storage device

public static File getExternalStorageDirectory ()

Added in API level 1
Return the primary external storage directory

查看File

的文档

http://developer.android.com/reference/java/io/File.html#getAbsolutePath()

public String getAbsolutePath ()

Added in API level 1
Returns the absolute path of this file. An absolute path is a path that starts at a root of the file system. On Android, there is only one root: /.

getAbsolutePath（） - 无法解析方法 - Android studio

1 个答案: