Android Java从res / raw读取文本文件，找不到文件错误

Question

I am trying to read a text file that is stored under res/raw . I cannot workout why the file will not open and read the contents to the textArea " usersTextArea ". The system just outputs System.out.println("file could not open"); . I don't think the file path is incorrect. Anyone know what could be causing the problem? Thanks.

public void readFile()
{        
    String path = "android.resource://" + getPackageName() + "/" + R.raw.users;

    try
    {
        Scanner s = new Scanner(new File(path));

        while (scan.hasNext())
        {
            String data = scan.next();
            usersTextArea.append(data);
        }
        scan.close();
    }
    catch(Exception error)
    {
        System.out.println("file could not open");
    }
}

Answer 1

您可以访问以下原始资源：

getResources().openRawResource(R.raw.users)

Answer 2

You should try something like:

public void readFile() {
    final InputStream input = getResources().openRawResource(R.raw.users);
    final Scanner scanner = new Scanner(input);
    try {
        // read the file
    } finally {
        // don't forget to close the resources, once you are done with them
        scanner.close();
        input.close();
    }
}

Answer 3

provide Read/Write permission in manifest file

<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

then you can read res/raw file