Java 将JSON值从整数转换为字符串
我正在使用AsyncTask连接到以下URL： 我遇到的一个问题是类型id。由于它是JSONArray，我将这些值添加到ArrayList中。随后，我想将这些值转换为字符串对应关系，如下所示：Java 将JSON值从整数转换为字符串,java,android,arraylist,Java,Android,Arraylist,我正在使用AsyncTask连接到以下URL： 我遇到的一个问题是类型id。由于它是JSONArray，我将这些值添加到ArrayList中。随后，我想将这些值转换为字符串对应关系，如下所示： //类型是json数组 JSONArray genreArry=obj.getJSONArray（“类型ID”）； ArrayList流派=新的ArrayList（）； 对于（int j=0；j
//类型是json数组
JSONArray genreArry=obj.getJSONArray（“类型ID”）；
ArrayList流派=新的ArrayList（）；
对于（int j=0；j private void getGenre(int genre) {
for (int i = 0; i < genreList.size(); i++) {
Log.d("THE", "THE GENRE ADAPTER RETRIEVED IS" + i + genreList.get(i).getId() + genreList.get(i).getName());
if (genreList.get(i).getId() == genre) {
String name = genreList.get(i).getName();
mGenre.setText(name);
}
}
private void getGenre（int类型）{
对于（int i=0；i已解决。
我通过在AsyncTask的onPostExecute中进行检查，成功地实现了这一点
try {
JSONObject json = new JSONObject(result);
JSONArray movies = json.getJSONArray("results");
for (int i = 0; i < movies.length(); i++) {
JSONObject obj = movies.getJSONObject(i);
//Create Movie Object
Movie movie = new Movie();
//get values from JSON
movie.setTitle(obj.getString("original_title"));
movie.setPopularity(obj.getString("popularity"));
movie.setYear(obj.getString("release_date"));
movie.setThumbnailUrl(obj.getString("poster_path"));
movie.setOverView(obj.getString("overview"));
// Genre is json array
JSONArray genreArry = obj.getJSONArray("genre_ids");
ArrayList<Integer> genre = new ArrayList<Integer>();
ArrayList<String> genreName = new ArrayList<String>();
for (int j = 0; j < genreArry.length(); j++) {
genre.add(genreArry.optInt(j));
for (int zz = 0; zz < myGenreList.size(); zz++) {
if (myGenreList.get(zz).getId() == genre.get(j)) {
String name = myGenreList.get(zz).getName();
genreName.add(name);
}
}
}
movie.setGenre(genre);
movie.setGenreName(genreName);
试试看{
JSONObject json=新的JSONObject（结果）；
JSONArray movies=json.getJSONArray（“结果”）；
对于（int i=0；iMovie.java-模型对象
public class Movie {
private int id;
private String title;
private List<String> genres;
public Movie() {
this(-1, null);
}
public Movie(int id, String title) {
this.id = id;
this.title = title;
this.genres = new ArrayList<String>();
}
public void addGenre(String s) {
this.genres.add(s);
}
public String getTitle() {
return title;
}
public List<String> getGenres() {
return genres;
}
}
公共类电影{
私有int-id；
私有字符串标题；
私人列表体裁；
公共电影（）{
这是（-1，空）；
}
公共电影（int-id，字符串标题）{
this.id=id；
this.title=标题；
this.genres=新的ArrayList（）；
}
公共void addgreen（字符串s）{
此.genres.add（s）；
}
公共字符串getTitle（）{
返回标题；
}
公共列表getGenres（）{
回归体裁；
}
}
MovieAdapter.java-ListView适配器
public class MovieAdapter extends ArrayAdapter<Movie> {
private final int layoutId;
public MovieAdapter(Context context, List<Movie> objects) {
super(context, 0, objects);
layoutId = R.layout.item_movie;
}
private static class ViewHolder {
TextView title;
TextView genres;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
Movie movie = getItem(position);
ViewHolder viewHolder; // view lookup cache stored in tag
if (convertView == null) {
viewHolder = new ViewHolder();
LayoutInflater inflater = LayoutInflater.from(getContext());
convertView = inflater.inflate(layoutId, parent, false);
viewHolder.title = (TextView) convertView.findViewById(R.id.movie_title);
viewHolder.genres = (TextView) convertView.findViewById(R.id.movie_genres);
convertView.setTag(viewHolder);
} else {
viewHolder = (ViewHolder) convertView.getTag();
}
// Populate the data into the template view using the data object
viewHolder.title.setText(movie.getTitle());
viewHolder.genres.setText(String.valueOf(movie.getGenres()));
// Return the completed view to render on screen
return convertView;
}
}
公共类电影适配器扩展了ArrayAdapter{
私人最终国际布局；
公共电影适配器（上下文、列表对象）{
超级（上下文，0，对象）；
layoutId=R.layout.item\u电影；
}
私有静态类视图持有者{
文本视图标题；
文本视图类型；
}
@凌驾
公共视图getView（int位置、视图转换视图、视图组父视图）{
Movie Movie=getItem（位置）；
ViewHolder ViewHolder；//存储在标记中的视图查找缓存
if（convertView==null）{
viewHolder=新的viewHolder（）；
LayoutInflater充气器=LayoutInflater.from（getContext（））；
convertView=充气机。充气（layoutId，父项，false）；
viewHolder.title=（TextView）convertView.findViewById（R.id.movie\u title）；
viewHolder.genres=（TextView）convertView.findViewById（R.id.movie\u流派）；
convertView.setTag（viewHolder）；
}否则{
viewHolder=（viewHolder）convertView.getTag（）；
}
//使用数据对象将数据填充到模板视图中
viewHolder.title.setText（movie.getTitle（））；
viewHolder.genres.setText（String.valueOf（movie.getGenres（））；
//返回要在屏幕上渲染的已完成视图
返回视图；
}
}
MainActivity.java
public class MainActivity extends Activity {
private static final String GENRES_URL = "http://api.themoviedb.org/3/genre/movie/list?api_key=6572f232190d6b55ec917726dab87783";
private static final String MOVIES_URL = "https://api.themoviedb.org/3/movie/upcoming?api_key=6572f232190d6b55ec917726dab87783";
private HashMap<Integer, String> genreMap = new HashMap<Integer, String>();
private List<Movie> movies = new ArrayList<Movie>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ListView lv = (ListView) findViewById(R.id.listView);
final MovieAdapter movieAdapter = new MovieAdapter(this, movies);
lv.setAdapter(movieAdapter);
// Build the genres map
JsonObjectRequest request1 = new JsonObjectRequest(GENRES_URL, null,
new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
try {
JSONArray genres = response.getJSONArray("genres");
for (int i = 0; i < genres.length(); i++) {
JSONObject genre = genres.getJSONObject(i);
int id = genre.getInt("id");
String name = genre.getString("name");
genreMap.put(id, name);
}
} catch (JSONException e) {
e.printStackTrace();
}
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Log.e("Network error", error.getMessage());
}
}
);
VolleyApplication.getInstance().getRequestQueue().add(request1);
JsonObjectRequest request2 = new JsonObjectRequest(MOVIES_URL, null,
new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
movieAdapter.clear();
try {
JSONArray results = response.getJSONArray("results");
for (int i = 0; i < results.length(); i++) {
JSONObject result = results.getJSONObject(i);
int movieId = result.getInt("id");
String title = result.getString("original_title");
Movie movie = new Movie(movieId, title);
JSONArray genreIds = result.getJSONArray("genre_ids");
for (int j = 0; j < genreIds.length(); j++) {
int id = genreIds.getInt(j);
String genre = genreMap.get(id);
movie.addGenre(genre);
}
movieAdapter.add(movie);
}
} catch (JSONException e) {
Log.e("JSONException", e.getMessage());
}
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Log.e("Network error", error.getMessage());
}
}
);
VolleyApplication.getInstance().getRequestQueue().add(request2);
}
}
公共类MainActivity扩展活动{
私有静态最终字符串类型\u URL=”http://api.themoviedb.org/3/genre/movie/list?api_key=6572f232190d6b55ec917726dab87783";
私有静态最终字符串\u URL=”https://api.themoviedb.org/3/movie/upcoming?api_key=6572f232190d6b55ec917726dab87783";
私有HashMap genreMap=新HashMap（）；
private List movies=new ArrayList（）；
@凌驾
创建时受保护的void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
setContentView（R.layout.activity_main）；
ListView lv=（ListView）findViewById（R.id.ListView）；
最终电影适配器电影适配器=新电影适配器（此为电影）；
lv.设置适配器（电影适配器）；
//构建类型图
JSONObjectRequest1=新的JsonObjectRequest（类型URL，null，
新的Response.Listener（）{
@凌驾
公共void onResponse（JSONObject响应）{
public class MainActivity extends Activity {
private static final String GENRES_URL = "http://api.themoviedb.org/3/genre/movie/list?api_key=6572f232190d6b55ec917726dab87783";
private static final String MOVIES_URL = "https://api.themoviedb.org/3/movie/upcoming?api_key=6572f232190d6b55ec917726dab87783";
private HashMap<Integer, String> genreMap = new HashMap<Integer, String>();
private List<Movie> movies = new ArrayList<Movie>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ListView lv = (ListView) findViewById(R.id.listView);
final MovieAdapter movieAdapter = new MovieAdapter(this, movies);
lv.setAdapter(movieAdapter);
// Build the genres map
JsonObjectRequest request1 = new JsonObjectRequest(GENRES_URL, null,
new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
try {
JSONArray genres = response.getJSONArray("genres");
for (int i = 0; i < genres.length(); i++) {
JSONObject genre = genres.getJSONObject(i);
int id = genre.getInt("id");
String name = genre.getString("name");
genreMap.put(id, name);
}
} catch (JSONException e) {
e.printStackTrace();
}
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Log.e("Network error", error.getMessage());
}
}
);
VolleyApplication.getInstance().getRequestQueue().add(request1);
JsonObjectRequest request2 = new JsonObjectRequest(MOVIES_URL, null,
new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
movieAdapter.clear();
try {
JSONArray results = response.getJSONArray("results");
for (int i = 0; i < results.length(); i++) {
JSONObject result = results.getJSONObject(i);
int movieId = result.getInt("id");
String title = result.getString("original_title");
Movie movie = new Movie(movieId, title);
JSONArray genreIds = result.getJSONArray("genre_ids");
for (int j = 0; j < genreIds.length(); j++) {
int id = genreIds.getInt(j);
String genre = genreMap.get(id);
movie.addGenre(genre);
}
movieAdapter.add(movie);
}
} catch (JSONException e) {
Log.e("JSONException", e.getMessage());
}
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Log.e("Network error", error.getMessage());
}
}
);
VolleyApplication.getInstance().getRequestQueue().add(request2);
}
}