我有一个使用外部电影API的Android应用程序，以便通过HTTP请求获取电影的内容。
在服务更改用于电影查询的域之前，每件事情都很顺利，我无法创建JSON对象来获取收到的响应内容。
以下是完成工作的代码片段（它在更改URL之前正常工作）
try {
Add.setEnabled(true);
movieContent.setText("");
URL url = new URL("http://www.omdbapi.com/?i=&t=" + searchET.getText().toString());
Log.d("URL content", url.toString());
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
Log.d("URL content", "register URL");
urlConnection.connect();
Log.d("URL connection", "establish connection");
String res = null;
BufferedReader reader = new BufferedReader(
new InputStreamReader(urlConnection.getInputStream()));
Log.d("stream buffer", "read the stream");
StringBuilder sb = new StringBuilder();
String line = "";
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
res = sb.toString();
Log.d("movie content", res);
JSONArray ja = new JSONArray(res);
Log.d("JSON array", "created");
JSONObject jo = ja.getJSONObject(0);
以下是日志的日志cat剪辑：
02-25 21:28:42.287: D/Username passed(32500): joker
02-25 21:28:42.295: D/USERFINALSESSION(32500): 2
02-25 21:28:53.311: V/ViewRoot(32500): BACK _ IME finished event: seq=1, handled=true, action=0c4s158
02-25 21:28:53.311: V/ViewRoot(32500): BACK _ IME finished mView : com.android.internal.policy.impl.PhoneWindow$DecorView@405488f0
02-25 21:28:53.436: V/ViewRoot(32500): BACK _ IME finished event: seq=2, handled=true, action=1c4s158
02-25 21:28:53.436: V/ViewRoot(32500): BACK _ IME finished mView : com.android.internal.policy.impl.PhoneWindow$DecorView@405488f0
02-25 21:28:59.873: D/URL content(32500): http://www.omdbapi.com/?i=&t=ted
02-25 21:28:59.889: D/URL content(32500): register URL
02-25 21:29:02.037: D/URL connection(32500): establish connection
02-25 21:29:03.608: D/stream buffer(32500): read the stream
02-25 21:29:03.615: D/movie content(32500): {"Title":"Ted","Year":"2012","Rated":"R","Released":"29 Jun 2012","Runtime":"106 min","Genre":"Comedy, Fantasy","Director":"Seth MacFarlane","Writer":"Seth MacFarlane (screenplay), Alec Sulkin (screenplay), Wellesley Wild (screenplay), Seth MacFarlane (story)","Actors":"Mark Wahlberg, Mila Kunis, Seth MacFarlane, Joel McHale","Plot":"As the result of a childhood wish, John Bennett's teddy bear, Ted, came to life and has been by John's side ever since - a friendship that's tested when Lori, John's girlfriend of four years, wants more from their relationship.","Language":"English","Country":"USA","Awards":"Nominated for 1 Oscar. Another 6 wins & 21 nominations.","Poster":"http://ia.media-imdb.com/images/M/MV5BMTQ1OTU0ODcxMV5BMl5BanBnXkFtZTcwOTMxNTUwOA@@._V1_SX300.jpg","Metascore":"62","imdbRating":"7.1","imdbVotes":"315,192","imdbID":"tt1637725","Type":"movie","Response":"True"}
02-25 21:29:03.748: D/dalvikvm(32500): GC_CONCURRENT freed 177K, 47% free 3041K/5639K, external 2311K/2882K, paused 4ms+5ms
02-25 21:29:03.748: D/Cursor(32500): Database path: moviesGeeks
02-25 21:29:03.748: D/Cursor(32500): Table name : watched
02-25 21:29:03.748: D/Cursor(32500): Database path: moviesGeeks
02-25 21:29:03.748: D/Cursor(32500): Table name : users
会出现什么问题？ 顺便说一句，以前的网址是：http://mymovieapi.com
这是将JSONArray编辑为JSONObject后的代码： @Dayan
res = sb.toString();
Log.d("movie content", res);
/*JSONArray ja = new JSONArray(res);
Log.d("JSON array", "created");
JSONObject jo = ja.getJSONObject(0);*/
JSONObject jo= new JSONObject(res);
st = "Title : " + jo.getString("Title");
movie[0] = st;
st = null;
Log.d("JSON", movie[0]);
st = "Directors : \n" +jo.getString("Director");
movie[1] = st;
st = null;
Log.d("JSON", movie[1]);
st = "Actors : \n"+ jo.getString("Actors");
movie[2] = st;
st = null;
Log.d("JSON", movie[2]);
st = "Runtime : " + jo.getString("Runtime");
movie[3] = st;
st = null;
Log.d("JSON", movie[3]);
st = "Release Year : " + jo.getString("Released");
movie[4] = st;
st = null;
Log.d("JSON", movie[4]);
st = "Rating : " + jo.getString("imdbRating");
movie[5] = st;
st = null;
Log.d("JSON", movie[5]);
st = "Description : \n" + jo.getString("Plot");
movie[6] = st;
st = null;
Log.d("JSON", movie[6]);
Log.d("before appending", movie[6] + "");
for (int i = 0; i < movie.length - 1; ++i) {
movieContent.append(movie[i] + "\n\n");
}
imageURL = jo.getString("Poster");
movie[7] = imageURL;
Log.d("image url", movie[7] + "");
// added jafar alali
// write Json content to a file
int c = 0;
for (String content : movie) {
if (c == 0) {
writefileInitial();
c++;
}
writeJsonFile(content, JsonFileToread);
}
try {
Bitmap bitmap = BitmapFactory
.decodeStream((InputStream) new URL(imageURL)
.getContent());
moviePoster.setImageBitmap(bitmap);
} catch (MalformedURLException e) {
// TODO: handle exception
Log.d("poster", movie[7] + "");
} catch (IOException e) {
e.printStackTrace();
// TODO: handle exception
}
Add.setVisibility(View.VISIBLE);
addtolist.setVisibility(View.VISIBLE);
} catch (JSONException e) {
// TODO Auto-generated catch block
movieContent.setText("Film not found");
moviePoster.setImageBitmap(null);
Add.setVisibility(View.GONE);
addtolist.setVisibility(View.GONE);
} catch (IOException e) {
// TODO Auto-generated catch block
movieContent.setText("Error in Connection");
moviePoster.setImageBitmap(null);
Add.setVisibility(View.GONE);
addtolist.setVisibility(View.GONE);
}
catch (Exception e) {
movieContent.setText("Exception");
moviePoster.setImageBitmap(null);
Add.setVisibility(View.GONE);
addtolist.setVisibility(View.GONE);
}
// extract file content into a movie object to be inserted
movies tempMovie = new movies();
tempMovie.setTitle(movie[0]);
tempMovie.setDirector(movie[1]);
tempMovie.setActors(movie[2]);
tempMovie.setRuntime(movie[3]);
tempMovie.setYear(movie[4]);
tempMovie.setGrate(movie[5]);
tempMovie.setDescription(movie[6]);
tempMovie.setURL(movie[7]);
// insert movie into data base
// send object to data base movie inserter
try {
dbm.addMovie(tempMovie);
} catch (Exception e1) {
// TODO Auto-generated catch block
Toast tt = Toast.makeText(HomePage.this,
"Insertion failed", 3000);
tt.setGravity(Gravity.CENTER, 0, 0);
tt.show();
}
}
});
答案 0 :(得分：2)
您收到的是JsonObject，而不再是JsonArray！
更改您的代码：
JSONArray ja = new JSONArray(res);
Log.d("JSON array", "created");
JSONObject jo = ja.getJSONObject(0);
有：
JSONObject jo = new JSONObject(res);
这应该有用！
答案 1 :(得分：1)
替换
JSONArray ja = new JSONArray(res);
用
JSONObject movie = new JSONObject(res);
因为你的JSON字符串就是这个。
{"Title":"Ted","Year":"2012","Rated":"R","Released":"29 Jun 2012","Runtime":"106 min","Genre":"Comedy, Fantasy","Director":"Seth MacFarlane","Writer":"Seth MacFarlane (screenplay), Alec Sulkin (screenplay), Wellesley Wild (screenplay), Seth MacFarlane (story)","Actors":"Mark Wahlberg, Mila Kunis, Seth MacFarlane, Joel McHale","Plot":"As the result of a childhood wish, John Bennett's teddy bear, Ted, came to life and has been by John's side ever since - a friendship that's tested when Lori, John's girlfriend of four years, wants more from their relationship.","Language":"English","Country":"USA","Awards":"Nominated for 1 Oscar. Another 6 wins & 21 nominations.","Poster":"http://ia.media-imdb.com/images/M/MV5BMTQ1OTU0ODcxMV5BMl5BanBnXkFtZTcwOTMxNTUwOA@@._V1_SX300.jpg","Metascore":"62","imdbRating":"7.1","imdbVotes":"315,192","imdbID":"tt1637725","Type":"movie","Response":"True"}
{ -----> Represents JSONObject
[ -----> Represents JSONArray
答案 2 :(得分：1)
<强>更新
这对我来说很好：http://rextester.com/live/ZKUZ3520
您应该在代码中解析要附加到URI的文本：
URL url = new URL("http://www.omdbapi.com/?i=&t=" + searchET.getText().toString());
如果您输入“True Grit”等内容，则会回复 404 ：
Exception in thread "main" java.io.IOException: Server returned HTTP response code: 400 for URL: http://www.omdbapi.com/?t=True Grit
因为您省略了空格，因此（%20）
http://www.omdbapi.com/?t=True%20Grit
此外，请确保在收到JSON后正确反序列化：
如Rajesh CP所述，您使用的旧API标准显然使用了Array而不是Object。因此，将JSONArray ja = new JSONArray(res);替换为JSONObject movie = new JSONObject(res);
这是我在删除JSON反序列化后想出的代码，试图将问题稍微隔离一下。这将正确地从服务器获取JSON而没有错误。
public static void main(String args[]) throws IOException
{
URL url = new URL("http://www.omdbapi.com/?i=&t=True%20Grit");
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.connect();
BufferedReader reader = new BufferedReader(new InputStreamReader(urlConnection.getInputStream()));
StringBuilder sb = new StringBuilder();
String line = "";
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
System.out.println(sb.toString());
}