我有来自服务器的json响应，附在下面。我想用android中的volley来解析这个响应。如何解析数组中的对象。
{
"status": "ok",
"source": "techcrunch",
"sortBy": "top",
"articles": [
{
"author": "Ingrid Lunden, Fitz Tepper",
"title": "Confirmed: AT&T is buying Time Warner for $85.4B in cash and shares",
"description": "After days of speculation, the deal is now official: AT&T is acquiring Time Warner for $85 billion in a mix of cash and shares, paving the way for..",
"url": "http://social.techcrunch.com/2016/10/22/confirmed-att-is-buying-time-warner-for-85-4b-in-cash-and-shares/",
"urlToImage": "https://tctechcrunch2011.files.wordpress.com/2016/10/946_432_newsroom_release_tw.jpg?w=764&h=400&crop=1",
"publishedAt": "2016-10-23T00:02:34Z"
},
我想要访问第一个对象，然后是下一个对象，然后是下一个对象。升值。
答案 0 :(得分：3)
这应显示标题列表
JsonObjectRequest req = new JsonObjectRequest(Request.Method.GET, url, null,
new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
JSONArray jsonArray = null;
try {
jsonArray = response.getJSONArray("articles");
for(int i=0; i<jsonArray.length(); i++){
JSONObject jsonObject = (JSONObject) jsonArray.get(i);
Log.d(TAG, jsonObject.getString("title"));
}
} catch (JSONException e) {
e.printStackTrace();
} }
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Log.d(TAG, "Error: " + error.getMessage());
}
});
答案 1 :(得分：0)
首先你必须使用
添加排球库编译'com.mcxiaoke.volley：library-aar：1.0.0'
在build.grdle文件中，如下所示
apply plugin: 'com.android.application'
android {
compileSdkVersion 24
buildToolsVersion "24.0.2"
defaultConfig {
applicationId "com.iitism.ritik.popularmovies"
minSdkVersion 15
targetSdkVersion 24
versionCode 1
versionName "1.0"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
compile fileTree(include: ['*.jar'], dir: 'libs')
testCompile 'junit:junit:4.12'
compile 'com.android.support:appcompat-v7:24.1.1'
compile 'com.android.support:design:24.1.1'
compile 'com.mcxiaoke.volley:library-aar:1.0.0'
compile 'com.squareup.picasso:picasso:2.5.2'
compile files('libs/YouTubeAndroidPlayerApi.jar')
}
然后你需要一个url来获取json对象 之后你可以按照下面的代码来解析json
StringRequest stringRequest = new StringRequest(URL, new Response.Listener<String>() {
@Override
public void onResponse(String response) {
Log.d("TAG",response);
showJson(response);
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(MainActivity.this,error.getMessage(),Toast.LENGTH_SHORT).show();
}
});
RequestQueue requestQueue = Volley.newRequestQueue(this);
requestQueue.add(stringRequest);
public void showJson(String response)
{
Log.d("TAG",response);
try {
JSONObject jsonObject = new JSONObject(response);
JSONArray jsonArray = jsonObject.getJSONArray("results");
int n = jsonArray.length();
for(int i=0;i<n;i++)
{
JSONObject movieObject = jsonArray.getJSONObject(i);
String title = movieObject.getString("original_title");
String poster_path = movieObject.getString("poster_path");
String overView = movieObject.getString("overview");
String releaseDate = movieObject.getString("release_date");
String popularity = movieObject.getString("popularity");
String voteAvg = movieObject.getString("vote_average");
String id = movieObject.getString("id");
movieList.add(new Movie(poster_path,title,overView,releaseDate,popularity,voteAvg,id));
movieAdapter.notifyDataSetChanged();
}
} catch (JSONException e) {
Toast.makeText(getApplicationContext(),"Not available",Toast.LENGTH_SHORT).show();
e.printStackTrace();
}
}
就像在你的json中你想解析“文章”数组所以你可以使用下面的代码
JSONArray jsonArray = jsonObject.getJSONArray("articles");
int n = jsonArray.length();
for(int i=0;i<n;i++)
{
JSONObject movieObject = jsonArray.getJSONObject(i);
//do your work here
}
答案 2 :(得分：0)
首先检查此APi是POST API还是GET API。如果这个api是POST方法，那么在hashmap中传递参数。如果它是GET api，则传递参数和url。以下代码解析你给定的json。
StringRequest notificationrequest = new StringRequest(Request.Method.POST, YOUR_URL,
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
try {
JSONObject jObject = new JSONObject(response);
if (jObject.getString("status").equals("ok")) {
String source = jObject.getString("source");
String sortby = jObject .getString("sortBy");
JSONArray jsonArray = jObject.getJSONArray("articles");
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject jsonObject = jsonArray.getJSONObject(i);
String author = jsonObject.getString("author");
String title= jsonObject.getString("title");
String description= jsonObject.getString("description");
String url= jsonObject.getString("url");
String urlToImage= jsonObject.getString("urlToImage");
String publishedAt= jsonObject.getString("publishedAt");
}
} else {
}
} catch (JSONException e) {
e.printStackTrace();
}
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError volleyError) {
Log.e("error", "" + volleyError.getMessage());
}
}) {
@Override
protected Map<String, String> getParams() throws AuthFailureError {
Map<String, String> params = new HashMap<String, String>();
//put your parameter in the hash map variable params if you using post request
return params;
}
};
RequestQueue notificationqueue = Volley.newRequestQueue(getContext());
notificationqueue.add(notificationrequest);
并且不要忘记把凌空的依赖性放在一起。
答案 3 :(得分：0)
尝试这种方式来获得结果
JsonObjectRequest obreq = new JsonObjectRequest(Request.Method.GET, url, new
Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
try {
JSONArray obj = response.getJSONArray("articles");
for (int i = 0; i < obj.length(); i++) {
JSONObject jsonObject = obj.getJSONObject(i);
String type = jsonObject.getString("author");
// check the other values like this so on..
}
}
catch (JSONException e) {
e.printStackTrace();
}
}
},null);
答案 4 :(得分：0)
public void onResponse(Object response) {
JSONArray jsonArray = null;
try {
Log.e("status",((JSONObject)response).getString("status"));
Log.e("source",((JSONObject)response).getString("source"));
Log.e("sortBy",((JSONObject)response).getString("sortBy"));
Log.e("articles",((JSONObject)response).getString("articles"));//Notice than the articles string could not be completly display in the Log if it is too long
//if you want to browse the table of articles
jsonArray = ((JSONObject)response).getJSONArray("articles");
for (int i = 0 ; i < jsonArray.length() ; i++){
Log.e("Item "+i,jsonArray.getJSONObject(i).getString("source"));
}
} catch (JSONException e) {
e.printStackTrace();
}
}
答案 5 :(得分：0)
@Override
public void onResponse(JSONObject response) {
try {
JSONArray array=response.getJSONArray("articles");
for (int i=0;i<array.length();i++){
JSONObject object=array.getJSONObject(i);
String title=object.get("title").toString();
}
} catch (JSONException e) {
e.printStackTrace();
}
}