获取信息使用JSON API [英] Getting info from api using JSON
本文介绍了获取信息使用JSON API的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我有麻烦从这个API读
I'm having troubles reading from this api
<一个href="http://api.xhanch.com/islamic-get-prayer-time.php?lng=67&lat=24&yy=2012&mm=7&gmt=5&m=json" rel="nofollow">http://api.xhanch.com/islamic-get-prayer-time.php?lng=67&lat=24&yy=2012&mm=7&gmt=5&m=json
下面是我的code:
new Read().execute("sunrise");
public JSONObject retrieveInfo(String user) throws ClientProtocolException,IOException, JSONException {
StringBuilder url = new StringBuilder(URL);
url.append(user);
HttpGet get = new HttpGet(url.toString());
HttpResponse r = client.execute(get);
HttpEntity e = r.getEntity();
String data = EntityUtils.toString(e);
JSONArray timeline = new JSONArray(data);
JSONObject last = timeline.getJSONObject(1);
return last;
}
public class Read extends AsyncTask<String, Integer, String> {
protected String doInBackground(String... arg0) {
// TODO Auto-generated method stub
try {
json = retrieveInfo("");
return json.getString(arg0[0]);
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
此方法总是返回一个空字符串,而不是我需要的信息。
This method always returns a blank string instead of the info I need.
推荐答案
在这里不用工作的例子给你。
here goes a working example for you
import java.io.IOException;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.os.AsyncTask;
import android.os.Bundle;
public class GetPrayerTime extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.custom_component);
new Read().execute("sunrise");
}
public JSONObject retrieveInfo(String user) throws ClientProtocolException,
IOException, JSONException {
StringBuilder url = new StringBuilder(
"http://api.xhanch.com/islamic-get-prayer-time.php?lng=67&lat=24&yy=2012&mm=7&gmt=5&m=json");
url.append(user);
HttpClient httpclient = new DefaultHttpClient();
HttpGet get = new HttpGet(url.toString());
HttpResponse r = httpclient.execute(get);
HttpEntity e = r.getEntity();
String data = EntityUtils.toString(e);
JSONObject timeline = new JSONObject(data);
return timeline.getJSONObject("1");
}
private class Read extends AsyncTask<String, Integer, String> {
ProgressDialog pd = null;
@Override
protected void onPreExecute() {
super.onPreExecute();
pd = new ProgressDialog(GetPrayerTime.this);
pd.setTitle("Downloading...");
pd.setMessage("Please wait...");
pd.setCancelable(false);
pd.show();
}
protected String doInBackground(String... arg0) {
// TODO Auto-generated method stub
try {
JSONObject json = retrieveInfo("");
return json.getString(arg0[0]);
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(String status) {
super.onPostExecute(status);
pd.dismiss();
AlertDialog alertDialog = new AlertDialog.Builder(
GetPrayerTime.this).create();
alertDialog.setTitle("Prayer time");
alertDialog.setMessage(status);
alertDialog.setButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
GetPrayerTime.this.finish();
dialog.cancel();
}
});
alertDialog.setIcon(android.R.drawable.ic_dialog_info);
alertDialog.show();
}
}
}
这篇关于获取信息使用JSON API的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
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