안드로이드 파일 복사 퍼미션

파일 퍼미션을 manifets에 넣어주어도 

코드로 다시 호출해 주어야 한다.

// Storage Permissions variables
private static final int REQUEST_EXTERNAL_STORAGE = 1;
private static String[] PERMISSIONS_STORAGE = {
        Manifest.permission.READ_EXTERNAL_STORAGE,
        Manifest.permission.WRITE_EXTERNAL_STORAGE
};

//persmission method.
public void verifyStoragePermissions(Activity activity) {
    // Check if we have read or write permission
    int writePermission =
            ActivityCompat.checkSelfPermission(activity,
                Manifest.permission.WRITE_EXTERNAL_STORAGE);
    int readPermission =
            ActivityCompat.checkSelfPermission(activity,
                Manifest.permission.READ_EXTERNAL_STORAGE);

    if (writePermission!=PackageManager.PERMISSION_GRANTED ||
         readPermission!=PackageManager.PERMISSION_GRANTED) {

        Log.d("paulaner80","퍼미션이 없잖아!");
        ActivityCompat.requestPermissions( activity,
                PERMISSIONS_STORAGE,REQUEST_EXTERNAL_STORAGE );
    }else{
        Log.d("paulaner80","퍼미션이 있습니다");
        examMakeDirectory();
    }
}

@Override
public void onRequestPermissionsResult(int requestCode,
                                   @NonNull String[] permissions,
                                   @NonNull int[] grantResults) {
    super.onRequestPermissionsResult(requestCode, permissions, grantResults);

    if (requestCode == REQUEST_EXTERNAL_STORAGE) {
        if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
            // save file
            Log.d("paulaner80","퍼미션 허락 받았습니다");

            examMakeDirectory();

        } else {
            Log.d("paulaner80","퍼미션 거부 받았습니다");
            Toast.makeText(getApplicationContext(), "PERMISSION_DENIED",
                    Toast.LENGTH_SHORT).show();
        }
    }

}