Json image link我正在尝试使用Volley从Json Object中提取一个整数，但似乎无法返回该值。我试图将其提取为字符串（适用于双精度值），但不适用于我的int值。 Json响应和我的代码如下。这是我正在尝试检索的“ id”，并将其用作构建另一个网络调用的URL的一部分。
[json image link][1]
// parse Json using volley to make network call
private String parseMovieJSON(final String url) {
JsonObjectRequest request = new JsonObjectRequest(Request.Method.GET, url, null,
new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
try {
JSONArray jsonArray = response.getJSONArray("results");
mMoviesList.clear();
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject movie = jsonArray.getJSONObject(i);
//Get json data as strings
int id = movie.optInt("id");
String posterPath = movie.optString("poster_path");
String originalTitle = movie.optString("title");
String overview = movie.getString("overview");
String releaseDate = movie.optString("release_date");
String voteAverage = movie.optString("vote_average");
mMoviesList.add(new Movies(id, posterPath, originalTitle, overview, releaseDate, voteAverage));
}
myMoviesAdapter = new MyMoviesAdapter(MainActivity.this, mMoviesList);
myMoviesAdapter.setOnItemClickListener(MainActivity.this);
mRecyclerView.setAdapter(myMoviesAdapter);
myMoviesAdapter.notifyDataSetChanged();
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError volleyError) {
if (volleyError instanceof NetworkError) {
if (checkConnection()) {
parseMovieJSON(url);
} else if (!checkConnection()) {
Toast.makeText(MainActivity.this, "Check Network Connection", Toast.LENGTH_LONG).show();
mMoviesList = null;
}
}
}
});
mRequestQueue.add(request);
checkConnection();
return url;
}
// network call for Trailers
private void extractTrailer(String s) {
JsonObjectRequest request = new JsonObjectRequest(Request.Method.GET, uriBuilder(), null,
new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
try {
JSONArray jsonArray = response.getJSONArray("results");
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject results = jsonArray.getJSONObject(i);
//Get json data as strings
int idNumber = results.optInt(KEY_ID);
String movieKey = results.optString(KEY_URL);
String movieName = results.optString(KEY_NAME);
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError volleyError) {
}
});
mRequestQueue.add(request);
}
private String uriBuilder() {
// http://api.themoviedb.org/3/movie/157336/videos?api_key=### (template example)
Uri.Builder builder = Uri.parse(Constants.BASE_URL).buildUpon();
builder.appendPath("movie").
appendPath(String.valueOf(Constants.MOVIE_ID)).
appendPath("videos").
appendQueryParameter("api_key", BuildConfig.ApiKey);
return builder.build().toString();
}