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有一个在应用程序没有错误，也logcat中没有显示任何有用的应用程序不会崩溃，但是，它也不会显示任何东西。这里是JSON响应我收到类型：安卓：无法显示JSON数据，原因不明
{
"backdrop_path": "/mmxxEpTqVdwBlu5Pii7tbedBkPC.jpg",
"created_by": [
{
"id": 1216615,
"name": "Andrew Kreisberg",
"profile_path": "/giFmwdBAw6uwC8yeHPaW6dq6YT8.jpg"
},
{
"id": 211962,
"name": "Geoff Johns",
"profile_path": "/xkaRZu1o1NILQ4PcRXqnjOrJ0Y0.jpg"
}
],
"episode_run_time": [
44
],
"first_air_date": "2014-10-07",
"genres": [
{
"id": 18,
"name": "Drama"
},
{
"id": 10765,
"name": "Sci-Fi & Fantasy"
}
],
"homepage": "http://www.cwtv.com/shows/the-flash/",
"id": 60735,
"in_production": true,
"languages": [
"en"
],
"last_air_date": "2017-04-25",
"name": "The Flash",
"networks": [
{
"id": 71,
"name": "The CW"
}
],
"number_of_episodes": 65,
"number_of_seasons": 3,
"origin_country": [
"US"
],
"original_language": "en",
"original_name": "The Flash",
"overview": "After a particle accelerator causes a freak storm, CSI Investigator Barry Allen is struck by lightning and falls into a coma. Months later he awakens with the power of super speed, granting him the ability to move through Central City like an unseen guardian angel. Though initially excited by his newfound powers, Barry is shocked to discover he is not the only \"meta-human\" who was created in the wake of the accelerator explosion -- and not everyone is using their new powers for good. Barry partners with S.T.A.R. Labs and dedicates his life to protect the innocent. For now, only a few close friends and associates know that Barry is literally the fastest man alive, but it won't be long before the world learns what Barry Allen has become...The Flash.",
"popularity": 50.611816,
"poster_path": "/lUFK7ElGCk9kVEryDJHICeNdmd1.jpg",
"production_companies": [
{
"name": "Warner Bros. Television",
"id": 1957
},
{
"name": "DC Entertainment",
"id": 9993
},
{
"name": "Berlanti Productions",
"id": 27711
}
],
"seasons": [
{
"air_date": "2016-04-19",
"episode_count": 5,
"id": 79954,
"poster_path": null,
"season_number": 0
},
{
"air_date": "2014-10-07",
"episode_count": 23,
"id": 60523,
"poster_path": "/hJysBrladxYuP5065vCAf91KcyB.jpg",
"season_number": 1
},
{
"air_date": "2015-10-06",
"episode_count": 23,
"id": 66922,
"poster_path": "/8xWZPVX1cv9V5YD1RPeLj9QZDE9.jpg",
"season_number": 2
},
{
"air_date": "2016-10-04",
"episode_count": 19,
"id": 77888,
"poster_path": "/6F8v0n37xbGY4syGcW6pRcB9BcY.jpg",
"season_number": 3
}
],
"status": "Returning Series",
"type": "Scripted",
"vote_average": 6.7,
"vote_count": 984
}
这里是什么应用程序正在显示的截图： Click here to see the image
请注意，主海报，背景和所有其他的事情，包括tabLayout是MainActivity的一部分，viewPager由5个片段组成，其中2个在此活动中正常工作;一个人应该工作，并正在与另一个活动使用它的工作，但在这里不工作，其他两个根本不工作。
在MainActivity能够加载所述数据的罚款。在此之前，我试图将一个Bundle从这个活动发送到其余的片段，但五分之三的结果是空的，剩下的两个仍然加载数据就好了。现在，我在MainActivity中使用返回数据的函数，然后在片段中使用getActivity（）方法，我知道我无法在其他任何地方使用这些片段。现在，我已经检查了一切，碎片正在接收数据，但即使是现在，它们也没有显示任何内容。下面是解析JSON，我使用的是recyclerView，也是我使用里面的AsyncTask凌空代码，以便显示默认messgaes只有当一切设置：
private class connectToTheInternet extends AsyncTask<String, Void, Void> {
@Override
protected Void doInBackground(String... strings) {
StringRequest stringRequest = new StringRequest(Request.Method.GET, url,
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
Log.d("receivedData", response);
try {
JSONObject parentObject = new JSONObject(response);
Log.d("receivedData", response);
JSONArray genreArray = parentObject.getJSONArray("genres");
for (int i = 0; i < genreArray.length(); i++) {
JSONObject tempObject = genreArray.getJSONObject(i);
if (i < genreArray.length() - 1) {
genreCollector = genreCollector + tempObject.getString("name") + ", ";
} else
genreCollector = genreCollector + tempObject.getString("name");
}
genre.setText(genreCollector);
if (genreArray.length() == 1) {
genreTag.setText("Genres: ");
} else
genreTag.setText("Genre: ");
JSONArray creatorArray = parentObject.getJSONArray("created_by");
for (int i = 0; i < creatorArray.length(); i++) {
JSONObject tempObject = creatorArray.getJSONObject(i);
if (i < creatorArray.length() - 1) {
creatorName = creatorName + tempObject.getString("name") + ", ";
} else {
creatorName = creatorName + tempObject.getString("name");
}
}
createdBy.setText(creatorName);
JSONArray runTimeArray = parentObject.getJSONArray("episode_run_time");
int arrayLength = runTimeArray.length();
for (int i = 0; i < runTimeArray.length(); i++) {
//No need for a tempObject, as the values in this array don't have a 'key'.....
runTimeCollector += runTimeArray.getInt(i);
}
runTimeCollector = runTimeCollector/arrayLength;
runtime.setText(runTimeCollector);
numberOfSeasons.setText(parentObject.getInt("number_of_seasons"));
numberOfEpisodes.setText(parentObject.getInt("number_of_episodes"));
lastAirDate.setText(convertDate(parentObject.getString("last_air_date")));
} catch (JSONException e) {
e.printStackTrace();
Toast.makeText(getContext(), e.getLocalizedMessage(), Toast.LENGTH_SHORT).show();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(getContext(), "Error Detected", Toast.LENGTH_SHORT).show();
}
});
RequestQueue requestQueue = Volley.newRequestQueue(getContext());
requestQueue.add(stringRequest);
return null;
}
@Override
protected void onPostExecute(Void aVoid) {
super.onPostExecute(aVoid);
runTimeTag.setText("RunTime:");
numberOfSeasonsTag.setText("Number Of Seasons:");
numberOfEpisodesTag.setText("Number Of Episodes:");
lastAirDateTag.setText("Last Air Date:");
createdByTag.setText("Created By:");
overViewTag.setText("OVERVIEW:");
}
}
这里是logcat的痕迹：
04-01 09:23:54.292 1503-1503/com.example.android.jsontutorial W/System.err: org.json.JSONException: No value for credits
04-01 09:23:54.292 1503-1503/com.example.android.jsontutorial W/System.err: at org.json.JSONObject.get(JSONObject.java:389)
04-01 09:23:54.292 1503-1503/com.example.android.jsontutorial W/System.err: at org.json.JSONObject.getJSONObject(JSONObject.java:609)
04-01 09:23:54.292 1503-1503/com.example.android.jsontutorial W/System.err: at com.example.android.jsontutorial.credits$1.onResponse(credits.java:109)
04-01 09:23:54.293 1503-1503/com.example.android.jsontutorial W/System.err: at com.example.android.jsontutorial.credits$1.onResponse(credits.java:103)
04-01 09:23:54.293 1503-1503/com.example.android.jsontutorial W/System.err: at com.android.volley.toolbox.StringRequest.deliverResponse(StringRequest.java:60)
04-01 09:23:54.293 1503-1503/com.example.android.jsontutorial W/System.err: at com.android.volley.toolbox.StringRequest.deliverResponse(StringRequest.java:30)
04-01 09:23:54.293 1503-1503/com.example.android.jsontutorial W/System.err: at com.android.volley.ExecutorDelivery$ResponseDeliveryRunnable.run(ExecutorDelivery.java:99)
04-01 09:23:54.293 1503-1503/com.example.android.jsontutorial W/System.err: at android.os.Handler.handleCallback(Handler.java:751)
04-01 09:23:54.293 1503-1503/com.example.android.jsontutorial W/System.err: at android.os.Handler.dispatchMessage(Handler.java:95)
04-01 09:23:54.293 1503-1503/com.example.android.jsontutorial W/System.err: at android.os.Looper.loop(Looper.java:154)
04-01 09:23:54.293 1503-1503/com.example.android.jsontutorial W/System.err: at android.app.ActivityThread.main(ActivityThread.java:6077)
04-01 09:23:54.293 1503-1503/com.example.android.jsontutorial W/System.err: at java.lang.reflect.Method.invoke(Native Method)
04-01 09:23:54.293 1503-1503/com.example.android.jsontutorial W/System.err: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865)
04-01 09:23:54.293 1503-1503/com.example.android.jsontutorial W/System.err: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)
04-01 09:24:09.710 1503-1682/com.example.android.jsontutorial D/Volley: [132] BasicNetwork.logSlowRequests: HTTP response for request=<[ ] https://api.themoviedb.org/3/tv/top_rated?api_key=43630259102f25bfa2d21a3039b&language=en-US&page=1 0x89bd75e7 NORMAL 1> [lifetime=22435], [size=18147], [rc=200], [retryCount=1]
04-01 09:36:07.024 1503-1510/com.example.android.jsontutorial W/art: Suspending all threads took: 5.062ms
04-01 09:39:12.493 1503-1510/com.example.android.jsontutorial W/art: Suspending all threads took: 26.896ms
请帮助，因为我是新的，不知道该怎么办.....
PS “Credits”是另一个java类的名称，应该显示所有在该特定电影中表演的名人名单。这不会妨碍其他两个不显示任何数据的类的功能。
崩溃发生在Credit类，更具体地在'credits.java' o正如错误日志所说的那样，第109行。 –