java将数组从php发送到安卓 studio
嘿,我在000webhost上有一些数据,我想把它们发送到我的安卓 studio应用程序。我已经通过直接在000webhost上运行来检查查询,它正在工作
但它并没有向安卓 studio发送数据。我尝试打印它打印的值null。基本上,我发送的数据是试图发送一个数组。我的功能在点击按钮时执行。我想在从php发送的经纬度值上显示一个标记。但是它发送null,在logcat上没有错误
我正在使用的apiconnector
package com.example.arpanagarwal.sba;
import 安卓.util.Log;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.ParseException;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
import org.json.JSONArray;
import org.json.JSONException;
import java.io.IOException;
public class Apiconnector2 {
public JSONArray getUser() {
//int i = 1;
String url;
//url = "http://10.0.0.2/uservalidate.php?BookName="+temp;
HttpEntity httpEntity = null;
//ArrayList<NameValuePair> nameValuePairs1 = new ArrayList<NameValuePair>();
//nameValuePairs1.add(new BasicNameValuePair("search","sys"));
try {
System.out.println("step 3");
url = "http://askamit2012.netne.net/callemptybin.php";
DefaultHttpClient httpclient = new DefaultHttpClient();
HttpGet httpGet = new HttpGet(url);
//httpGet.setEntity(new UrlEncodedFormEntity(nameValuePairs1));
HttpResponse httpResponse = httpclient.execute(httpGet);
httpEntity = httpResponse.getEntity();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
JSONArray jsonArray = null;
if (httpEntity != null) {
try {
String entityResponse = EntityUtils.toString(httpEntity);
// String entityResponse = null;
Log.e("Entity Response :", entityResponse);
jsonArray = new JSONArray(entityResponse);
} catch (JSONException e) {
e.printStackTrace();
} catch (ParseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
return jsonArray;
}
}
/******我呼叫连接器的功能*****/
public class callemptybin extends AsyncTask<Apiconnector2,Long,JSONArray>
{
protected JSONArray doInBackground(Apiconnector2... params) {
System.out.println("step1");
return params[0].getUser();
}
@Override
protected void onPreExecute()
{
System.out.println("step4");
super.onPreExecute();
}
protected void onPostExecute(JSONArray jsonArray)
{
System.out.println("jsonarray=" + jsonArray);
try{
if(jsonArray==null)
{
System.out.println("null");
}
else {
JSONObject json = jsonArray.getJSONObject(0);
double lat1 = json.getDouble("latitude");
double long1 = json.getDouble("longitude");
LatLng jpnagar = new LatLng(lat1, long1);
mMap.addMarker(new MarkerOptions().position(jpnagar).title("Bin Empty").icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_GREEN)));
}
}
catch (JSONException e) {
System.out.println("catch");
e.printStackTrace();
}
}
}
/****分配给按钮的功能***/
public void onthrow(View view)
{
if(view.getId()==R.id.button3 )
{
//throwtrash();
System.out.println("step 00");
new callemptybin().execute(new Apiconnector2());
tt=1;
}
}
/****Php脚本****/
<?php
if (isset($_SERVER['HTTP_ORIGIN']))
{
header("Access-Control-Allow-Origin: {$_SERVER['HTTP_ORIGIN']}");
header('Access-Control-Allow-Credentials: true');
header('Access-Control-Max-Age: 86400'); // cache for 1 day
}
// Access-Control headers are received during OPTIONS requests
if ($_SERVER['REQUEST_METHOD'] == 'OPTIONS')
{
if (isset($_SERVER['HTTP_ACCESS_CONTROL_REQUEST_METHOD']))
header("Access-Control-Allow-Methods: GET, POST, OPTIONS");
if (isset($_SERVER['HTTP_ACCESS_CONTROL_REQUEST_HEADERS']))
header("Access-Control-Allow-Headers: {$_SERVER['HTTP_ACCESS_CONTROL_REQUEST_HEADERS']}");
exit(0);
}
$con = mysql_connect("mysql8.000webhost.com","********","*******");
if(!$con)
{
die("Could not connect :".mysql_error());
}
mysql_select_db("*********",$con);
//mysql_query($sql);
mysql_query("set names 'utf8'");
$result=mysql_query("select * from GPS where marker=1");
while($row=mysql_fetch_assoc($result))
{
$output[]=$row;
}
print(json_encode($output));
mysql_close($con);
?>
logcat结果。请小心使用logcat,因为会发生多个功能。我只检查了一次按钮点击,它的onstrow功能与onclick初始化相同。检查json数组在logcat中打印为null的位置
04-14 21:16:51.387 1109-1109/? D/PhoneStatusBar: removeNotification key=安卓.os.BinderProxy@42b5f3f0 keyCode=1119220720 old=StatusBarNotification(pkg=com.安卓.systemui user=UserHandle{0} id=252119 tag=null score=10: Notification(pri=1 contentView=com.安卓.systemui/0x1090064 vibrate=null sound=null defaults=0x0 flags=0x2 kind=[null]))
04-14 21:17:38.757 6128-6128/com.example.arpanagarwal.sba I/System.out: **jsonarray=null**
04-14 21:17:38.767 6128-6128/com.example.arpanagarwal.sba I/System.out: null
04-14 21:18:56.327 6819-6835/? D/AlertSyncService: onHandleIntent action = null
# 1 楼答案
帖子太长,stackoverflow不喜欢它们。我有一些建议,你可以自己试试
使用Rest控制台测试来自服务器的预期响应。(Link for Google Chrome)
忘记} ,欢迎来到现代世界
DefaultHttpClient
,使用^{保持简短。没有人关心
onthrow()
做什么要将JSON解析为Java对象,请使用^{}
使用
Volley
意味着您将不再解析JSON,不再需要创建异步任务,也不再为doInBackground()
编写代码。我已经做了一个GitHub gist来在android代码中实现Volley