正在为网站开发应用程序。一个星期左右，我一直在尝试解决这个问题，并在谷歌上搜索了很多!而且我似乎找不到解决方案。我有一个 JSON 字符串，它是:
{
"error":"",
"S8tf":{
"infoToken":"wCfhXe",
"deleteToken":"gzHTfGcF",
"size":122484,
"sha1":"8c4e2bbc0794d2bd4f901a36627e555c068a94e6",
"filename":"Screen_Shot_2013-07-02_at_3.52.23_PM.png"
},
"S29N":{
"infoToken":"joRm6p",
"deleteToken":"IL5STLhq",
"size":129332,
"sha1":"b4a03897121d0320b82059c36f7a10a8ef4c113d",
"filename":"Stockholmsyndromet.docx"
}
}
我希望它像 JSON 数组一样，所以我不必搜索“S8tf”和“S29N”，因为这是由服务器随机生成的。如果你明白我的意思？ (不善于解释)。
我似乎无法从“错误”中获取所有信息并显示出来。我什么都试过了，但我似乎还是想不通。
Activity :(教程，应该有效)
package com.androidhive.jsonparsing;
import java.util.ArrayList;
import java.util.HashMap;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.ListActivity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;
public class AndroidJSONParsingActivity extends ListActivity {
// url to make request
private static String url = "http://api.bayfiles.net/v1/account/files?session=7je10rvdhr1mcvjam75hetaul0";
// JSON Node names
private static final String TAG_CONTACTS = "error";
private static final String TAG_ID = "id";
private static final String TAG_NAME = "name";
private static final String TAG_EMAIL = "email";
private static final String TAG_ADDRESS = "address";
private static final String TAG_GENDER = "gender";
private static final String TAG_PHONE = "phone";
private static final String TAG_PHONE_MOBILE = "mobile";
private static final String TAG_PHONE_HOME = "home";
private static final String TAG_PHONE_OFFICE = "office";
// contacts JSONArray
JSONArray contacts = null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// Hashmap for ListView
ArrayList<HashMap<String, String>> contactList = new ArrayList<HashMap<String, String>>();
// Creating JSON Parser instance
JSONParser jParser = new JSONParser();
// getting JSON string from URL
JSONObject json = jParser.getJSONFromUrl(url);
try {
// Getting Array of Contacts
contacts = json.getJSONArray(TAG_CONTACTS);
// looping through All Contacts
for(int i = 0; i < contacts.length(); i++){
JSONObject c = contacts.getJSONObject(i);
// Storing each json item in variable
String id = c.getString(TAG_ID);
String name = c.getString(TAG_NAME);
String email = c.getString(TAG_EMAIL);
String address = c.getString(TAG_ADDRESS);
String gender = c.getString(TAG_GENDER);
// Phone number is agin JSON Object
JSONObject phone = c.getJSONObject(TAG_PHONE);
String mobile = phone.getString(TAG_PHONE_MOBILE);
String home = phone.getString(TAG_PHONE_HOME);
String office = phone.getString(TAG_PHONE_OFFICE);
// creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
// adding each child node to HashMap key => value
map.put(TAG_ID, id);
map.put(TAG_NAME, name);
map.put(TAG_EMAIL, email);
map.put(TAG_PHONE_MOBILE, mobile);
// adding HashList to ArrayList
contactList.add(map);
}
} catch (JSONException e) {
e.printStackTrace();
}
/**
* Updating parsed JSON data into ListView
* */
ListAdapter adapter = new SimpleAdapter(this, contactList,
R.layout.list_item,
new String[] { TAG_NAME, TAG_EMAIL, TAG_PHONE_MOBILE }, new int[] {
R.id.name, R.id.email, R.id.mobile });
setListAdapter(adapter);
// selecting single ListView item
ListView lv = getListView();
// Launching new screen on Selecting Single ListItem
lv.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// getting values from selected ListItem
String name = ((TextView) view.findViewById(R.id.name)).getText().toString();
String cost = ((TextView) view.findViewById(R.id.email)).getText().toString();
String description = ((TextView) view.findViewById(R.id.mobile)).getText().toString();
// Starting new intent
Intent in = new Intent(getApplicationContext(), SingleMenuItemActivity.class);
in.putExtra(TAG_NAME, name);
in.putExtra(TAG_EMAIL, cost);
in.putExtra(TAG_PHONE_MOBILE, description);
startActivity(in);
}
});
}
}
编辑:我知道看到 OP 使它工作但没有任何类型的代码是多么令人恼火。所以我会发布对我有用的代码:)
public class FilesActivity extends SherlockListActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.dblist);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setTitle("Files");
String response = null;
DefaultHttpClient httpClient = new DefaultHttpClient();
ResponseHandler <String> resonseHandler = new BasicResponseHandler();
HttpPost postMethod = new HttpPost("URL");
try
{
JSONObject json = new JSONObject();
json.put("filename", "error");
//json.put("Fiedl2", "");
postMethod.setEntity(new ByteArrayEntity(json.toString().getBytes("UTF8")));
postMethod.setHeader( "Content-Type", "application/json" );
response = httpClient.execute(postMethod,resonseHandler);
TextView txt = (TextView)findViewById(R.id.nodata);
//JSONObject mJsonObject = new JSONObject(response);
//JSONObject userJObject = mJsonObject.getJSONObject("error");
JSONObject request = new JSONObject(response);
for (Iterator keyIterator = request.keys(); keyIterator.hasNext(); ) {
// will be set to "S29N", "S8tf", "error" etc
String key = (String) keyIterator.next();
// will get value if it's an JSONObject or null if it's not
JSONObject object = request.optJSONObject(key);
if (object != null) {
//doSomething(object); // ← process the object
txt.setText(object.toString());
Log.d("log_tag", object.toString());
}
}
}
catch(Exception e)
{
e.printStackTrace();
Log.d("log_tag", "Error: " + e.toString());
}
}
非常感谢你们!
最佳答案
让我们重新格式化它作为开始。
{
"S29N": {
"deleteToken": "IL5STLhq",
"filename": "Stockholmsyndromet.docx",
"infoToken": "joRm6p",
"sha1": "b4a03897121d0320b82059c36f7a10a8ef4c113d",
"size": 129332
},
"S8tf": {
"deleteToken": "gzHTfGcF",
"filename": "Screen_Shot_2013-07-02_at_3.52.23_PM.png",
"infoToken": "wCfhXe",
"sha1": "8c4e2bbc0794d2bd4f901a36627e555c068a94e6",
"size": 122484
},
"error": ""
}
因此，您似乎想要实现的目标是迭代 S29N、S8tf 和任何其他对象，前提是它们确实是对象。这是可行的(代码未经测试):
// let's say sourceString is the variable holding the JSON text
JSONObject request = new JSONObject(sourceString);
for (Iterator keyIterator = request.keys(); keyIterator.hasNext(); ) {
// will be set to "S29N", "S8tf", "error" etc
String key = (String) keyIterator.next();
// will get value if it's an JSONObject or null if it's not
JSONObject object = request.optJSONObject(key);
if (object != null) {
doSomething(object); // ← process the object
}
}
很抱歉，如果它没有帮助——我已经在你发布更新的问题之前回答了，现在我真的被 java 源代码惊呆了，因为我无法弄清楚你收到的数据与数据的关系你正在显示(前者似乎是一些文件操作请求，后者是一些个人联系数据)。
关于android - 将 JSON String 转换为 JSON Array 并显示在 ListView 中，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/17553991/