Java 使用recyclerview和cardview在android活动中读取JSON数组
我知道如何解析JSON对象,如下所示Java 使用recyclerview和cardview在android活动中读取JSON数组,java,android,Java,Android,我知道如何解析JSON对象,如下所示 { "users": [{ "id": 2, "username": "user", "full_name": "user full name", "profilePicture": "/images/profileimage.png" }, { "id": 2, "us
{
"users": [{
"id": 2,
"username": "user",
"full_name": "user full name",
"profilePicture": "/images/profileimage.png"
},
{
"id": 2,
"username": "user2",
"full_name": "user2 full name",
"profilePicture": "/images/profileimage2.png"
}
]
}
通过像这样使用recyclerview和cardview调用JSON对象
try {
JSONObject response = new JSONObject(result);
JSONArray users= response.optJSONArray("users");
feedsList = new ArrayList<>();
for (int i = 0; i < users.length(); i++) {
JSONObject user = users.optJSONObject(i);
FeedItem item = new FeedItem();
item.setTitle(user.optString("full_name"));
item.setThumbnail(user.optString("profilePicture"));
feedsList.add(item);
}
} catch (JSONException e) {
e.printStackTrace();
}
任何人都知道我如何阅读这种类型的JSON,以[而不是{can help me开头,请尝试以下方法:
try {
JSONObject response = new JSONObject(result);
JSONArray users= response.getJSONArray("users");
feedsList = new ArrayList<>();
for (int i = 0; i < users.length(); i++) {
JSONObject user = users.getJSONObject(i);
FeedItem item = new FeedItem();
item.setTitle(user.getString("full_name"));
item.setThumbnail(user.getString("profilePicture"));
feedsList.add(item);
}
} catch (JSONException e) {
e.printStackTrace();
}
试试看{
JSONObject响应=新JSONObject(结果);
JSONArray users=response.getJSONArray(“用户”);
feedsList=新的ArrayList();
对于(int i=0;i
您的JSON错误
右JSON
{
"users": [{
"id": 2,
"username": "user",
"full_name": "user full name",
"profilePicture": "/images/profileimage.png"
},
{
"id": 2,
"username": "user2",
"full_name": "user2 full name",
"profilePicture": "/images/profileimage2.png"
}
]
}
并将您的代码替换为
try {
JSONObject response = new JSONObject(result);
JSONArray users= response.getJSONArray("users");
feedsList = new ArrayList<>();
for (int i = 0; i < users.length(); i++) {
JSONObject user = users.getJSONObject(i);
FeedItem item = new FeedItem();
item.setTitle(user.getString("full_name"));
item.setThumbnail(user.getString("profilePicture"));
feedsList.add(item);
}
} catch (JSONException e) {
e.printStackTrace();
}
试试看{
JSONObject响应=新JSONObject(结果);
JSONArray users=response.getJSONArray(“用户”);
feedsList=新的ArrayList();
对于(int i=0;i
你的错误是你可以使用posts.length替换it用户。lenth
try {
JSONObject response = new JSONObject(result);
JSONArray users= response.optJSONArray("users");
feedsList = new ArrayList<>();
for (int i = 0; i < users.length(); i++) {
JSONObject user = users.optJSONObject(i);
FeedItem item = new FeedItem();
item.setTitle(user.optString("full_name"));
item.setThumbnail(user.optString("profilePicture"));
feedsList.add(item);
}
} catch (JSONException e) {
e.printStackTrace();
}
试试看{
JSONObject响应=新JSONObject(结果);
JSONArray users=response.optJSONArray(“用户”);
feedsList=新的ArrayList();
对于(int i=0;i
我设法首先调用JSONArray并解析JSONObject
如下
try {
JSONArray jArray = new JSONArray(result);
feedsList = new ArrayList<>();
for (int i = 0; i < jArray.length(); i++) {
JSONObject user = jArray.optJSONObject(i);
FeedItem item = new FeedItem();
item.setTitle(user.optString("full_name"));
item.setThumbnail(user.optString("profilePicture"));
feedsList.add(item);
}
} catch (JSONException e) {
e.printStackTrace();
}
试试看{
JSONArray jArray=新JSONArray(结果);
feedsList=新的ArrayList();
for(int i=0;i
谢谢你的想法帮了我这么多!!有什么问题吗?你说你可以解析JSON,但后来你说你不能?@Knight请检查我的答案。你的JSON是错误的请检查JSON LINT并检查我的答案@Dennyboth你的JSON格式都不正确谢谢我想阅读以[和]开头的JSON
try {
JSONArray jArray = new JSONArray(result);
feedsList = new ArrayList<>();
for (int i = 0; i < jArray.length(); i++) {
JSONObject user = jArray.optJSONObject(i);
FeedItem item = new FeedItem();
item.setTitle(user.optString("full_name"));
item.setThumbnail(user.optString("profilePicture"));
feedsList.add(item);
}
} catch (JSONException e) {
e.printStackTrace();
}