Android 无法在主外部存储器中写入文件

因此，我没有外部SD卡，我想将文件写入设备内部存储器的外部分区中

这是我的密码：

private String filename = "SampleFile.txt";
private String filepath = "MyFileStorage";
File mySensorData = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_MOVIES)
    , filepath);
    String myData = "";

private void FileWrite(String sensorReading) throws IOException {
        if (!isExternalStorageAvailable() || isExternalStorageReadOnly()) {
            try {
                FileOutputStream fos = new FileOutputStream(mySensorData);
                fos.write(sensorReading.getBytes());
                fos.close();

                Toast.makeText(this, "File written to the external storage.",
                        Toast.LENGTH_SHORT).show();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        else {

            Toast.makeText(this, "Unable to read the external storage.",
                    Toast.LENGTH_SHORT).show();
        }
    }

    //external storage discrepancies handler
    private static boolean isExternalStorageReadOnly() {
        String extStorageState = Environment.getExternalStorageState();
        if (Environment.MEDIA_MOUNTED_READ_ONLY.equals(extStorageState)) {
            return true;
        }
        return false;
    }

    private static boolean isExternalStorageAvailable() {
        String extStorageState = Environment.getExternalStorageState();
        if (Environment.MEDIA_MOUNTED.equals(extStorageState)) {
            return true;
        }
        return false;
    }

我经常遇到无法读取外部存储器的问题。toast和监视器上的此错误：

W/System.err: Caused by: android.system.ErrnoException: open failed: EROFS (Read-only file system)

问题在哪里？

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谢谢。

您不能这样做，您需要超级用户权限或root用户权限 检查此帖子是否已回复

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尝试getExternalStorageDirectory而不是getExternalStoragePublicDirectory。或Environment.DIRECTORY_MOVIES@RandykaYudhistira不行！