Во-первых, вы должны создать свой собственный класс запросов, например
class InputStreamVolleyRequest extends Request<byte[]> {
private final Response.Listener<byte[]> mListener;
private Map<String, String> mParams;
//create a static map for directly accessing headers
public Map<String, String> responseHeaders ;
public InputStreamVolleyRequest(int method, String mUrl ,Response.Listener<byte[]> listener,
Response.ErrorListener errorListener, HashMap<String, String> params) {
// TODO Auto-generated constructor stub
super(method, mUrl, errorListener);
// this request would never use cache.
setShouldCache(false);
mListener = listener;
mParams=params;
}
@Override
protected Map<String, String> getParams()
throws com.android.volley.AuthFailureError {
return mParams;
};
@Override
protected void deliverResponse(byte[] response) {
mListener.onResponse(response);
}
@Override
protected Response<byte[]> parseNetworkResponse(NetworkResponse response) {
//Initialise local responseHeaders map with response headers received
responseHeaders = response.headers;
//Pass the response data here
return Response.success( response.data, HttpHeaderParser.parseCacheHeaders(response));
}
}
Теперь просто отправьте запрос через наш пользовательский класс с Request.Method.GET и URL-адресом, откуда вы хотите загрузить файл.
String mUrl= <YOUR_URL>;
InputStreamVolleyRequest request = new InputStreamVolleyRequest(Request.Method.GET, mUrl,
new Response.Listener<byte[]>() {
@Override
public void onResponse(byte[] response) {
// TODO handle the response
try {
if (response!=null) {
FileOutputStream outputStream;
String name=<FILE_NAME_WITH_EXTENSION e.g reference.txt>;
outputStream = openFileOutput(name, Context.MODE_PRIVATE);
outputStream.write(response);
outputStream.close();
Toast.makeText(this, "Download complete.", Toast.LENGTH_LONG).show();
}
} catch (Exception e) {
// TODO Auto-generated catch block
Log.d("KEY_ERROR", "UNABLE TO DOWNLOAD FILE");
e.printStackTrace();
}
}
} ,new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
// TODO handle the error
error.printStackTrace();
}
}, null);
RequestQueue mRequestQueue = Volley.newRequestQueue(getApplicationContext(), new HurlStack());
mRequestQueue.add(request);