安卓在共享存储创建文件报Operation not permitted

放假几天 发表于 2022-1-12 16:48

本帖最后由放假几天于 2022-1-12 21:09 编辑

代码
/**
* 创建文件
*
* @Param name
* @return
*/
public String fileCj(String name) {
//    获取外部存储路径
//    String path = Environment.getDownloadCacheDirectory().getAbsolutePath()+"/"+name;
//    Log.e("路径",Environment.getExternalStorageDirectory()+"");
//    Log.e("",Environment.getExternalStorageState().equals("mounted")+"");//查看外部存储是否存在

//    String path = context.getExternalFilesDir(null)+ "//" + name;

   File createFiles = new File(name);

   try {
         if (!createFiles.exists()) {
            createFiles.createNewFile();
         }
   } catch (IOException e) {
         Log.d("文件创建失败", "files err:" + e.getMessage());
   }

   return name;
}

报错
W/System.err: java.io.FileNotFoundException: /storage/emulated/0/Documents/gnss/2022-01-12-03:45:55/GNSS/location.txt: open failed: EPERM (Operation not permitted)

jxn|android 发表于 2022-1-12 16:52

没权限申请存储权限

放假几天 发表于 2022-1-12 19:14

jxn|android 发表于 2022-1-12 16:52
没权限申请存储权限

if (ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA)
            != PackageManager.PERMISSION_GRANTED
            || ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)
            != PackageManager.PERMISSION_GRANTED
            || ContextCompat.checkSelfPermission(this, Manifest.permission.READ_EXTERNAL_STORAGE)
            != PackageManager.PERMISSION_GRANTED
            || ContextCompat.checkSelfPermission(getApplication(), Manifest.permission.ACCESS_FINE_LOCATION)
            != PackageManager.PERMISSION_GRANTED) {
         //多个权限一起申请
         ActivityCompat.requestPermissions(this, new String[]{
               Manifest.permission.CAMERA,
               Manifest.permission.WRITE_EXTERNAL_STORAGE,
               Manifest.permission.READ_EXTERNAL_STORAGE,
               Manifest.permission.ACCESS_FINE_LOCATION,

         }, 1);
   }
给了权限的。文件夹可以创建，但文件不可以

放假几天 发表于 2022-1-12 21:07

已解决，参考https://stackoverflow.com/questions/68140893/android-studio-throwing-ioexception-operation-not-permitted
原因是Android 11 中的存储机制更新导致

jxn|android 发表于 2022-1-14 09:14

好吧好久没写安卓了

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安卓在共享存储创建文件报Operation not permitted