Java 在凌空中执行操作后，对象的android Arraylist为空_Java_Android_Arraylist_Android Volley

Java 在凌空中执行操作后，对象的android Arraylist为空

java android

Java 在凌空中执行操作后，对象的android Arraylist为空,java,android,arraylist,android-volley,Java,Android,Arraylist,Android Volley,我想在执行截击操作后访问Arraylist，但每次尝试访问时都会显示IndexOutOfBoundException。如何在OnCreate方法中的onResponse方法中访问Arraylist？感谢您的帮助，谢谢 public class MovieDetailsActivity extends AppCompatActivity { TextView movieIdText; private VolleySingleton volleySingleton; pri

我想在执行截击操作后访问Arraylist，但每次尝试访问时都会显示IndexOutOfBoundException。如何在OnCreate方法中的onResponse方法中访问Arraylist？感谢您的帮助，谢谢

 public class MovieDetailsActivity extends AppCompatActivity {
    TextView movieIdText;
    private VolleySingleton volleySingleton;
    private RequestQueue mRequestQueue;
    private ArrayList<MovieDetails> detailsMovies = new ArrayList<>();
    private ArrayList<MovieDetails> detailsUrl = new ArrayList<>();
    public String youtubeVideoId;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_movie_details);
        Intent i = getIntent();
        String movieId = i.getExtras().getString("movieId");
        volleySingleton = VolleySingleton.getsInstance();
        mRequestQueue = VolleySingleton.getmRequestQueue();
        parseMovieDetails();
        Toast.makeText(getApplicationContext(),detailsMovies.get(0).getYoutube_id(),Toast.LENGTH_LONG).show();


}
    public void parseMovieDetails(){



        JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(Request.Method.GET, getUrl(100), new Response.Listener<JSONObject>() {
            @Override
            public void onResponse(JSONObject response) {
                MovieDetails movieDetails = new MovieDetails();
                if (response == null || response.length() == 0) {
                    Toast.makeText(getApplicationContext(), "Null Object", Toast.LENGTH_LONG).show();
                }

                try {

                    JSONObject movieData = response.getJSONObject("data");
                    JSONObject movieDetailsObject = movieData.getJSONObject(Keys.EndPointMovieDetails.KEYS_MOVIE);
                    String movieTitle = movieDetailsObject.getString(Keys.EndPointMovieDetails.KEYS_TITLE_LONG);
                    long movieRating = movieDetailsObject.getInt(Keys.EndPointMovieDetails.KEYS_RATING);
                    String movieSynopsis = movieDetailsObject.getString(Keys.EndPointMovieDetails.KEYS_DESCRIPTION);
                    String moviePosterUrl = movieDetailsObject.getString(Keys.EndPointMovieDetails.KEYS_COVER);
                    String movieYoutubeId = movieDetailsObject.getString(Keys.EndPointMovieDetails.KEY_YOUTUBE_ID);
                    movieDetails.setTitle(movieTitle);
                    movieDetails.setRating(movieRating);
                    movieDetails.setSummary(movieSynopsis);
                    movieDetails.setUrlThumbnail(moviePosterUrl);
                    movieDetails.setYoutube_id(movieYoutubeId);
                    detailsMovies.add(movieDetails);

                    JSONArray torrentDownloadLinks = movieDetailsObject.getJSONArray(Keys.EndPointMovieDetails.KEYS_TORRENTS);
                    for(int i=0;i<torrentDownloadLinks.length();i++) {
                        JSONObject urlInfo = torrentDownloadLinks.getJSONObject(i);
                        String urlTorrent = urlInfo.getString("url");
                        String quality = urlInfo.getString("quality");
                        String fileSize = urlInfo.getString("size");

                        movieDetails.setDownloadLink(urlTorrent);
                        movieDetails.setQuality(quality);
                        movieDetails.setFileSize(fileSize);
                        detailsMovies.add(movieDetails);
                    }

                } catch (JSONException e) {
                    e.printStackTrace();
                }


            }

        }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {

            }
        });
        mRequestQueue.add(jsonObjectRequest);

    }

    public String getUrl(int movieId){
        return UrlEndPoints.URL_MOVIE_DETAILS+
                UrlEndPoints.URl_CHAR_QUESTION+
                UrlEndPoints.URL_PARAM_ID+movieId;
    }



}

公共类MovieDetailsActivity扩展了AppCompativeActivity{
TextView电影文本；
单打单打单打单打单打单打；
私有请求队列mRequestQueue；
私有ArrayList detailsMovies=新ArrayList（）；
private ArrayList detailsUrl=new ArrayList（）；
公共字符串youtubeVideoId；
@凌驾
创建时受保护的void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
setContentView（R.layout.activity\u movie\u details）；
Intent i=getIntent（）；
String movieId=i.getExtras（）.getString（“movieId”）；
volleySingleton=volleySingleton.getsInstance（）；
mRequestQueue=VolleySingleton.getmRequestQueue（）；
parseMovieDetails（）；
Toast.makeText（getApplicationContext（），detailsMovies.get（0）.getYoutube_id（），Toast.LENGTH_LONG.show（）；
}
公共电影详细信息（）{
JsonObjectRequest JsonObjectRequest=新的JsonObjectRequest（Request.Method.GET，getUrl（100），new Response.Listener（）{
@凌驾
公共void onResponse（JSONObject响应）{
MovieDetails MovieDetails=新的MovieDetails（）；
if（response==null | | response.length（）==0）{
Toast.makeText（getApplicationContext（），“Null对象”，Toast.LENGTH_LONG.show（）；
}
试一试{
JSONObject movieData=response.getJSONObject（“数据”）；
JSONObject movieDetailsObject=movieData.getJSONObject（Keys.EndPointMovieDetails.Keys\u MOVIE）；
String movieTitle=movieDetailsObject.getString（Keys.EndPointMovieDetails.Keys\u TITLE\u LONG）；
long movieRating=movieDetailsObject.getInt（key.EndPointMovieDetails.Keys\u RATING）；
String movieSynopsis=movieDetailsObject.getString（key.EndPointMovieDetails.Keys\u DESCRIPTION）；
String moviePosterUrl=movieDetailsObject.getString（key.EndPointMovieDetails.Keys\u COVER）；
String movieYoutubeId=movieDetailsObject.getString（KEY.EndPointMovieDetails.KEY\u YOUTUBE\u ID）；
电影详情。片名（电影字幕）；
电影细节。设置（电影化）；
电影详情.集摘要（电影综合）；
setUrlThumbnail（moviePosterUrl）；
movieDetails.setYoutube_id（movieYoutubeId）；
detailsMovies.add（电影详情）；
JSONArray torrentDownloadLinks=movieDetailsObject.getJSONArray（key.EndPointMovieDetails.Keys_TORRENTS）；
对于（int i=0；ipublic class MovieDetailsActivity扩展了appcompativity{
TextView电影文本；
单打单打单打单打单打单打；
私有请求队列mRequestQueue；
私有ArrayList detailsMovies=新ArrayList（）；
private ArrayList detailsUrl=new ArrayList（）；
公共字符串youtubeVideoId；
@凌驾
创建时受保护的void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
setContentView（R.layout.activity\u movie\u details）；
Intent i=getIntent（）；
String movieId=i.getExtras（）.getString（“movieId”）；
volleySingleton=volleySingleton.getsInstance（）；
mRequestQueue=VolleySingleton.getmRequestQueue（）；
parseMovieDetails（）；
}
公共电影详细信息（）{
JsonObjectRequest JsonObjectRequest=新的JsonObjectRequest（Request.Method.GET，getUrl（100），new Response.Listener（）{
@凌驾
公共void onResponse（JSONObject响应）{
MovieDetails MovieDetails=新的MovieDetails（）；
if（response==null | | response.length（）==0）{
Toast.makeText（getApplicationContext（），“Null对象”，Toast.LENGTH_LONG.show（）；
}
试一试{
JSONObject movieData=response.getJSONObject（“数据”）；
JSONObject movieDetailsObject=movieData.getJSONObject（Keys.EndPointMovieDetails.Keys\u MOVIE）；
String movieTitle=movieDetailsObject.getString（Keys.EndPointMovieDetails.Keys\u TITLE\u LONG）；
long movieRating=movieDetailsObject.getInt（key.EndPointMovieDetails.Keys\u RATING）；
String movieSynopsis=movieDetailsObject.getString（key.EndPointMovieDetails.Keys\u DESCRIPTION）；
String moviePosterUrl=movieDetailsObject.getString（key.EndPointMovieDetails.Keys\u COVER）；
String movieYoutubeId=movieDetailsObject.getString（KEY.EndPointMovieDetails.KEY\u YOUTUBE\u ID）；
电影详情。片名（电影字幕）；
电影细节。设置（电影化）；
电影详情.集摘要（电影综合）；
setUrlThumbnail（moviePosterUrl）；
movieDetails.setYoutube_id（movieYoutubeId）；
detailsMovies.add（电影详情）；
JSONArray torrentDownloadLinks=movieDetailsObject.getJSONArray（key.EndPointMovieDetails.Keys_TORRENTS）；
对于（int i=0；i0）{
Toast.makeText（getApplicationContext（），detailsMovies.get（0）.getYoutube_id（），Toast.LENGTH_LONG.show（）；
}
}捕获（JSONException e）{
e、 printStackTrace（）；
}
}
}，new Response.ErrorListener（）{
@凌驾
公共无效onErrorResponse（截击错误）{
}
});
添加（jsonObjectRequest）；
}
公共字符串getUrl（int movieId）{
返回urlendops.URL
public class MovieDetailsActivity extends AppCompatActivity {
    TextView movieIdText;
    private VolleySingleton volleySingleton;
    private RequestQueue mRequestQueue;
    private ArrayList<MovieDetails> detailsMovies = new ArrayList<>();
    private ArrayList<MovieDetails> detailsUrl = new ArrayList<>();
    public String youtubeVideoId;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_movie_details);
        Intent i = getIntent();
        String movieId = i.getExtras().getString("movieId");
        volleySingleton = VolleySingleton.getsInstance();
        mRequestQueue = VolleySingleton.getmRequestQueue();
        parseMovieDetails();



}
    public void parseMovieDetails(){



        JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(Request.Method.GET, getUrl(100), new Response.Listener<JSONObject>() {
            @Override
            public void onResponse(JSONObject response) {
                MovieDetails movieDetails = new MovieDetails();
                if (response == null || response.length() == 0) {
                    Toast.makeText(getApplicationContext(), "Null Object", Toast.LENGTH_LONG).show();
                }

                try {

                    JSONObject movieData = response.getJSONObject("data");
                    JSONObject movieDetailsObject = movieData.getJSONObject(Keys.EndPointMovieDetails.KEYS_MOVIE);
                    String movieTitle = movieDetailsObject.getString(Keys.EndPointMovieDetails.KEYS_TITLE_LONG);
                    long movieRating = movieDetailsObject.getInt(Keys.EndPointMovieDetails.KEYS_RATING);
                    String movieSynopsis = movieDetailsObject.getString(Keys.EndPointMovieDetails.KEYS_DESCRIPTION);
                    String moviePosterUrl = movieDetailsObject.getString(Keys.EndPointMovieDetails.KEYS_COVER);
                    String movieYoutubeId = movieDetailsObject.getString(Keys.EndPointMovieDetails.KEY_YOUTUBE_ID);
                    movieDetails.setTitle(movieTitle);
                    movieDetails.setRating(movieRating);
                    movieDetails.setSummary(movieSynopsis);
                    movieDetails.setUrlThumbnail(moviePosterUrl);
                    movieDetails.setYoutube_id(movieYoutubeId);
                    detailsMovies.add(movieDetails);

                    JSONArray torrentDownloadLinks = movieDetailsObject.getJSONArray(Keys.EndPointMovieDetails.KEYS_TORRENTS);
                    for(int i=0;i<torrentDownloadLinks.length();i++) {
                        JSONObject urlInfo = torrentDownloadLinks.getJSONObject(i);
                        String urlTorrent = urlInfo.getString("url");
                        String quality = urlInfo.getString("quality");
                        String fileSize = urlInfo.getString("size");

                        movieDetails.setDownloadLink(urlTorrent);
                        movieDetails.setQuality(quality);
                        movieDetails.setFileSize(fileSize);
                        detailsMovies.add(movieDetails);
                    }

                    if(detailsMovies!=null && detailsMovies.size()>0){
                    Toast.makeText(getApplicationContext(),detailsMovies.get(0).getYoutube_id(),Toast.LENGTH_LONG).show();
                    }

                } catch (JSONException e) {
                    e.printStackTrace();
                }


            }

        }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {

            }
        });
        mRequestQueue.add(jsonObjectRequest);

    }

    public String getUrl(int movieId){
        return UrlEndPoints.URL_MOVIE_DETAILS+
                UrlEndPoints.URl_CHAR_QUESTION+
                UrlEndPoints.URL_PARAM_ID+movieId;
    }



}