嘿伙计我需要帮助来提取JSON值。我试过解析但结果没有出来。
继承我的java代码：
public class MyAct extends Activity {
EditText etResponse;
TextView tvIsConnected;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.result);
String s = getIntent().getStringExtra("username");
// get reference to the views
etResponse = (EditText) findViewById(R.id.etResponse);
tvIsConnected = (TextView) findViewById(R.id.tvIsConnected);
// check if you are connected or not
if(isConnected()){
tvIsConnected.setBackgroundColor(0xFF00CC00);
tvIsConnected.setText("You are connected");
}
else{
tvIsConnected.setText("You are NOT conncted");
}
// show response on the EditText etResponse
//etResponse.setText(GET("http://hmkcode.com/examples/index.php"));
// call AsynTask to perform network operation on separate thread
new HttpAsyncTask().execute("https://api.github.com/users/" + s + "/repos" );
}
public static String GET(String url){
InputStream inputStream = null;
String result = "";
String dat = "";
try {
// create HttpClient
HttpClient httpclient = new DefaultHttpClient();
// make GET request to the given URL
HttpResponse httpResponse = httpclient.execute(new HttpGet(url));
// receive response as inputStream
inputStream = httpResponse.getEntity().getContent();
// convert inputstream to string
if(inputStream != null) {
result = convertInputStreamToString(inputStream);
dat = result;
}
else
result = "Did not work!";
} catch (Exception e) {
Log.d("InputStream", e.getLocalizedMessage());
}
return result;
}
private static String convertInputStreamToString(InputStream inputStream) throws IOException{
BufferedReader bufferedReader = new BufferedReader( new InputStreamReader(inputStream));
String line = "";
String result = "";
while((line = bufferedReader.readLine()) != null)
result += line;
inputStream.close();
return result;
}
public boolean isConnected(){
ConnectivityManager connMgr = (ConnectivityManager) getSystemService(this.CONNECTIVITY_SERVICE);
NetworkInfo networkInfo = connMgr.getActiveNetworkInfo();
if (networkInfo != null && networkInfo.isConnected())
return true;
else
return false;
}
private class HttpAsyncTask extends AsyncTask<String, Void, String> {
@Override
protected String doInBackground(String... urls) {
return GET(urls[0]);
}
// onPostExecute displays the results of the AsyncTask.
@Override
protected void onPostExecute(String result) {
Toast.makeText(getBaseContext(), "Received!", Toast.LENGTH_LONG).show();
etResponse.setText(result);
}
}
}
我收到的输出如下：
[
{
"id": 8432681,
"name": "dispersy",
"full_name": "Tribler/dispersy",
"owner": {
"login": "Tribler",
"id": 2913489,
"avatar_url": "",
"gravatar_id": "",
"url": "",
"type": "Organization",
"site_admin": false
},
"private": false,
"size": 8960,
"stargazers_count": 28,
"watchers_count": 28,
"language": "Python",
"has_issues": true,
"has_downloads": true,
"has_wiki": true,
"has_pages": false,
"forks_count": 19,
"mirror_url": null,
"open_issues_count": 35,
"forks": 19,
"open_issues": 35,
"watchers": 28,
"default_branch": "devel"
}]
现在我希望从中提取HTML_URL和叉子等项目。这是JSON。
帮助我们。
答案 0 :(得分：0)
private class HttpAsyncTask extends AsyncTask<String, Void, Object> {
@Override
protected Object doInBackground(String... urls) {
JSONParser jParser = new JSONParser();
Object object = jParser.getJsonObject(urls[0]);
return object;
}
// onPostExecute displays the results of the AsyncTask.
@Override
public void onPostExecute(Object result){
JSONObject jsonObject = (JSONObject) result;
JSONArray jsonArray = jsonObject.getJSONArray("data");
for(int i=0;i<jsonArray.length;i++){
System.out.println(jsObject.getString("id"));
}
System.out.println(jsObject.getString("forks_count"));
}
}
再拿一个JSONParser类 然后粘贴以下代码
public class JSONParser {
static InputStream is = null;
static JSONObject jObj = null;
static String json = "";
public JSONParser() {
}
/**
* This method is used to parse the Url by taking the url as parameter
*
* @param url
* @return
*/
public Object getJsonObject(String url) {
try {
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpGet httpGet = new HttpGet(url);
HttpParams httpParams = new BasicHttpParams();
HttpConnectionParams.setStaleCheckingEnabled(httpParams, false);
HttpConnectionParams.setConnectionTimeout(httpParams, 15000);
HttpConnectionParams.setSoTimeout(httpParams, 15000);
httpGet.setParams(httpParams);
HttpResponse httpResponse = httpClient.execute(httpGet);
StatusLine statusLine = httpResponse.getStatusLine();
if (statusLine.getStatusCode() == HttpStatus.SC_OK) {
HttpEntity httpEntity = httpResponse.getEntity();
json = EntityUtils.toString(httpEntity);
try {
jObj = new JSONObject(json);
} catch (JSONException e) {
Log.e("JSON Parser", "Error parsing data " + e.toString());
}
if (json.startsWith("[")) {
// We have a JSONArray
try {
jObj = new JSONObject();
jObj.put("data", new JSONArray(json));
} catch (JSONException e) {
Log.d("JSON Parser",
"Error parsing JSONArray " + e.toString());
}
return jObj;
}
// return JSON String
return jObj;
}
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
return new String("Please check the connection");
} catch (ClientProtocolException e) {
e.printStackTrace();
return new String("Please check the connection");
} catch (IOException e) {
e.printStackTrace();
return new String("Please check the connection");
}
return new String("Please check the connection");
}
}