我有以下连接到数据库并返回一个json数组的方法。如何获得json字符串的值,然后通过此函数解析它
private String getServerData(String returnString) {
InputStream is = null;
String result = "";
//the year data to send
ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
nameValuePairs.add(new BasicNameValuePair("year","1970"));
//http post
try{
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(KEY_121);
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
is = entity.getContent();
}catch(Exception e){
Log.e("log_tag", "Error in http connection "+e.toString());
}
//convert response to string
try{
BufferedReader reader = new BufferedReader(new InputStreamReader(is,"iso-8859-1"),8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
result=sb.toString();
}catch(Exception e){
Log.e("log_tag", "Error converting result "+e.toString());
}
try{
JSONArray jArray = new JSONArray(result);
for(int i=0;i<jArray.length();i++){
// JSONObject json_data = jArray.getJSONObject(i);
JSONObject json_data = jArray.getJSONObject(i);
Log.i("log_tag","id: "+json_data.getInt("id")+
", name: "+json_data.getString("name")+
", sex: "+json_data.getInt("sex")+
", birthyear: "+json_data.getInt("birthyear")
);
//Get an output to the screen
returnString += "\n\t" + jArray.getJSONObject(i);
}
}catch(JSONException e){
Log.e("log_tag", "Error parsing data "+e.toString());
returnString += result.toString();
}
return returnString;
}
然后我想打电话从外面却是非常新到Java这个方法我不知道如何获取刺中把它放在HM的物体,像那个那注释掉。见下面
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
ListView listView = (ListView)findViewById(R.id.list);
myBooks = new ArrayList<HashMap<String,Object>>();
HashMap<String, Object> hm;
hm = new HashMap<String, Object>();
List<String> list=new ArrayList<String>();
list.add(getServerData(KEY_121));
//With the help of HashMap add Key, Values of Book, like name,price and icon path
/* hm = new HashMap<String, Object>();
hm.put(BOOKKEY, "Android");
hm.put(PRICEKEY, "Price Rs: 500");
hm.put(IMGKEY, R.raw.android); //i have images in res/raw folder
myBooks.add(hm);
SimpleAdapter adapter = new SimpleAdapter(this, myBooks, R.layout.listbox,
new String[]{BOOKKEY,PRICEKEY,IMGKEY}, new int[]{R.id.text1, R.id.text2, R.id.img});
listView.setAdapter(adapter);
listView.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
}
我这里对象的代码来获取返回的字符串,并使用HM对象将其添加到myBooks对象就像它在注释掉的代码怎么做。
感谢
彼得嗨,虽然很好的建议,我并不是正在寻找那个。不过,我认为我几乎接近解决这个问题,如果它有效,我会在这里发布。感谢有价值的链接 – Autolycus