我是 android 和 json 的新手。我想使用 json 将一些数据从 android 发布并返回到我的 php。
这是我的PHP。
<?php
$response = array();
include_once('C:\xampp\htdocs\RS\connection.php');
$latitude = $_POST['GPSlat'];
$longitude = $_POST['GPSlng'];
$result = mysql_query("SELECT nama_rs, telepon, lat, lng, ( 3959 * acos( cos( radians('$latitude') ) * cos( radians( lat ) ) * cos( radians( lng ) - radians('$longitude') ) + sin( radians('$latitude') ) * sin( radians( lat ) ) ) ) AS distance FROM datars HAVING distance < 2 ORDER BY distance LIMIT 0 , 1") or die(mysql_error());
if (mysql_num_rows($result) > 0) {
$response["peta_rs"] = array();
while ($row = mysql_fetch_array($result)) {
$peta_rs = array();
$peta_rs["nama"] = stripslashes($row["nama_rs"]);
$peta_rs["telepon_rs"] = stripslashes($row["telepon"]);
$peta_rs["lintang_rs"] = stripslashes($row["lat"]);
$peta_rs["bujur_rs"] = stripslashes($row["lng"]);
array_push($response["peta_rs"], $peta_rs);
}
$response["success"] = 1;
echo json_encode($response);
} else {
$response["success"] = 0;
$response["message"] = "error";
echo json_encode($response);
}
?>
如果你在我的 php 代码中看到，
$latitude = $_POST['GPSlat'];$longitude = $_POST['GPSlng'];
那么我想从 android 获取我的纬度和经度并发送到GPSlat并GPSlng执行sql查询并使用json显示它。有没有例子或教程？谢谢
这是我的安卓代码
public class Callrs extends Activity {
private LocationManager locationManager;
private LocationListener locationListener;
private ProgressDialog pDialog;
JSONParser jParser = new JSONParser();
private static String url_peta_rs = "http://192.168.199.1/RS/callrs.php";
private static final String TAG_SUCCESS = "success";
private static final String TAG_PETA_RS = "peta_rs";
public static final String TAG_NAMA_RS = "nama";
public static final String TAG_TELEPON_RS = "telepon_rs";
public static final String TAG_LINTANG_RS = "lintang_rs";
public static final String TAG_BUJUR_RS = "bujur_rs";
final Location locationA = new Location("point A");
final Location locationB = new Location("point B");
ProgressDialog dialog;
JSONArray peta_rs = null;
private LocationManager locManager;
private LocationListener locListener;
private ArrayList<Telepon> list_fasilitas = new ArrayList<Telepon>();
ListenToPhoneState listener;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
CurrentLocation();
new Activity().execute();
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == 100) {
Intent intent = getIntent();
finish();
startActivity(intent);
}
}
class Activity extends AsyncTask<String, String, String> {
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(Callrs.this);
pDialog.setMessage("Mohon tunggu...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
pDialog.show();
}
protected String doInBackground(String... args) {
postData();
List<NameValuePair> params = new ArrayList<NameValuePair>();
JSONObject json = jParser.makeHttpRequest(url_peta_rs,
"GET", params);
Log.d("peta_rs: ", json.toString());
try {
int success = json.getInt(TAG_SUCCESS);
if (success == 1) {
peta_rs = json.getJSONArray(TAG_PETA_RS);
for (int i = 0; i < peta_rs.length(); i++) {
JSONObject c = peta_rs.getJSONObject(i);
String nama_rs = c.getString(TAG_NAMA_RS);
String telepon_rs = c.getString(TAG_TELEPON_RS);
double lintang_rs = c.getDouble(TAG_LINTANG_RS);
double bujur_rs = c.getDouble(TAG_BUJUR_RS);
list_fasilitas.add(new Telepon(nama_rs,telepon_rs,
lintang_rs, bujur_rs));
}
} else {
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
protected void onPostExecute(String file_url) {
pDialog.dismiss();
}
}
public void CurrentLocation()
{
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
locationListener = new GPSLocationListener();
locationManager.requestLocationUpdates(
LocationManager.NETWORK_PROVIDER,
0,
0,
locationListener);
}
private class GPSLocationListener implements LocationListener
{
public void onLocationChanged(Location location) {
if (location != null) {
GeoPoint pointA = new GeoPoint(
(int) (location.getLatitude() * 1E6),
(int) (location.getLongitude() * 1E6));
locationA.setLatitude(pointA.getLatitudeE6() / 1E6);
locationA.setLongitude(pointA.getLongitudeE6() / 1E6);
Toast.makeText(getBaseContext(),
"Latitude: " + location.getLatitude() +
" Longitude: " + location.getLongitude(),
Toast.LENGTH_LONG).show();
/////////////////////
for (int i = 0; i < list_fasilitas.size(); i++) {
// transform the location to a geopoint
GeoPoint pointB = new GeoPoint(
(int) (list_fasilitas.get(i).lintang_rs * 1E6),
(int) (list_fasilitas.get(i).bujur_rs * 1E6));
locationB.setLatitude(pointB.getLatitudeE6() / 1E6);
locationB.setLongitude(pointB.getLongitudeE6() / 1E6);
DecimalFormat formatData = new DecimalFormat("#.#");
float distance = (float) locationA.distanceTo(locationB) / 1000;
String jarak;
jarak = String.valueOf(formatData.format(distance));
Toast.makeText(Callrs.this, ""+list_fasilitas.get(i).nama_rs, Toast.LENGTH_LONG).show();
try {
Intent callIntent = new Intent(Intent.ACTION_CALL);
callIntent.setData(Uri.parse("tel:"+list_fasilitas.get(i).telepon_rs));
startActivity(callIntent);
///
TelephonyManager tManager = (TelephonyManager)
getSystemService(Context.TELEPHONY_SERVICE);
listener = new ListenToPhoneState();
tManager.listen(listener, PhoneStateListener.LISTEN_CALL_STATE);
///
} catch (ActivityNotFoundException activityException) {
Log.e("dialing-example", "Call failed", activityException);
}
}
/////////////////////
}
}
public void onProviderDisabled(String provider) {
// TODO Auto-generated method stub
}
public void onProviderEnabled(String provider) {
// TODO Auto-generated method stub
}
public void onStatusChanged(String provider, int status, Bundle extras) {
// TODO Auto-generated method stub
}
}
public void postData() {
// Create a new HttpClient and Post Header
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://192.168.199.1/RS/callrs.php");
try {
// Add your data
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2);
nameValuePairs.add(new BasicNameValuePair("GPSlat", "-7.772354"));
nameValuePairs.add(new BasicNameValuePair("GPSlng", "110.351565"));
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
// Execute HTTP Post Request
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
String res = EntityUtils.toString(entity);
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
} catch (IOException e) {
// TODO Auto-generated catch block
}
}
}