Android - HTTP Post request

Question

Androidデバイスからサーバーに地理情報を送信するためにPOSTリクエストを呼び出す必要があります。

私のサーバーはPHPを使用しており、PHPスクリプトを使用して、受信したすべての投稿要求をデータベースに保存します。私のPHPスクリプトはうまくいきましたが、カールで試してみましたが、私のアンドロイドデバイスからいくつかの情報を送ろうとすると、ネットワークエラーが発生します。ここで

は私のエラーログはここ

12-11 12:08:02.871 10241-10241/local.example.markus.geoapp E/AndroidRuntime: FATAL EXCEPTION: main 
Process: local.example.markus.geoapp, PID: 10241 
android.os.NetworkOnMainThreadException 
at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1448) 
at java.net.Inet6AddressImpl.lookupHostByName(Inet6AddressImpl.java:102) 
at java.net.Inet6AddressImpl.lookupAllHostAddr(Inet6AddressImpl.java:90) 
at java.net.InetAddress.getAllByName(InetAddress.java:787) 
at com.android.okhttp.Dns$1.lookup(Dns.java:39) 
at com.android.okhttp.internal.http.RouteSelector.resetNextInetSocketAddress(RouteSelector.java:175) 
at com.android.okhttp.internal.http.RouteSelector.nextProxy(RouteSelector.java:141) 
at com.android.okhttp.internal.http.RouteSelector.next(RouteSelector.java:83) 
at com.android.okhttp.internal.http.StreamAllocation.findConnection(StreamAllocation.java:174) 
at com.android.okhttp.internal.http.StreamAllocation.findHealthyConnection(StreamAllocation.java:126) 
at com.android.okhttp.internal.http.StreamAllocation.newStream(StreamAllocation.java:95) 
at com.android.okhttp.internal.http.HttpEngine.connect(HttpEngine.java:281) 
at com.android.okhttp.internal.http.HttpEngine.sendRequest(HttpEngine.java:224) 
at com.android.okhttp.internal.huc.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:461) 
at com.android.okhttp.internal.huc.HttpURLConnectionImpl.connect(HttpURLConnectionImpl.java:127) 
at com.android.okhttp.internal.huc.HttpURLConnectionImpl.getOutputStream(HttpURLConnectionImpl.java:258) 
at com.android.tools.profiler.support.network.httpurl.TrackedHttpURLConnection.getOutputStream(TrackedHttpURLConnection.java:288) 
at com.android.tools.profiler.support.network.httpurl.HttpURLConnection$.getOutputStream(HttpURLConnection$.java:212) 
at local.example.markus.geoapp.MapsListener.sendPost(MapsListener.java:121) 
at local.example.markus.geoapp.MapsListener.onLocationChanged(MapsListener.java:77) 
at android.location.LocationManager$ListenerTransport._handleMessage(LocationManager.java:291) 
at android.location.LocationManager$ListenerTransport.-wrap0(Unknown Source:0) 
at android.location.LocationManager$ListenerTransport$1.handleMessage(LocationManager.java:236) 
at android.os.Handler.dispatchMessage(Handler.java:105) 
at android.os.Looper.loop(Looper.java:164) 
at android.app.ActivityThread.main(ActivityThread.java:6541) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767) 

である私のJavaコードは、私がhttp://example.local/gps.phpに私のPHPスクリプトにPOSTリクエストに関するいくつかの情報を送ることができますどのように

package local.example.markus.geoapp; 

import android.Manifest; 
import android.content.pm.PackageManager; 
import android.location.Location; 
import android.location.LocationListener; 
import android.location.LocationManager; 
import android.os.Build; 
import android.os.Bundle; 
import android.support.v4.app.ActivityCompat; 
import android.util.Log; 

import com.google.android.gms.maps.CameraUpdate; 
import com.google.android.gms.maps.CameraUpdateFactory; 
import com.google.android.gms.maps.GoogleMap; 
import com.google.android.gms.maps.model.CameraPosition; 
import com.google.android.gms.maps.model.LatLng; 
import com.google.android.gms.maps.model.MarkerOptions; 

import java.io.BufferedOutputStream; 
import java.io.BufferedWriter; 
import java.io.IOException; 
import java.io.OutputStream; 
import java.io.OutputStreamWriter; 
import java.net.HttpURLConnection; 
import java.net.MalformedURLException; 
import java.net.URL; 
import java.sql.Timestamp; 

/** 
* Created by markus on 04.12.17. 
*/ 

public class MapsListener implements LocationListener { 
// Member Variablen 
private GoogleMap googleMap; 

// Konstruktor 
public MapsListener() { 

} 

// Getter und Setter 
public GoogleMap getGoogleMap() { 
    return googleMap; 
} 

public void setGoogleMap(GoogleMap googleMap) { 
    this.googleMap = googleMap; 
} 


// Interface Methods 
@Override 
public void onLocationChanged(Location location) { 
    // Print new Latitide and Logtitude into log 
    Log.d("INFO", "New Location! Latitude: '" + location.getLatitude() + "', '" + location.getLongitude() + "'"); 

    // Define new Latitude and Logtitude object 
    LatLng latLng = new LatLng(location.getLatitude(), location.getLongitude()); 

    // Add a new Marker to the Map 
    this.googleMap.addMarker(new MarkerOptions().position(latLng).title("Lat:" + location.getLatitude() + ", Lng: " + location.getLongitude())); 

    // Build ca,era position 
    CameraPosition cameraPosition = new CameraPosition.Builder() 
      .target(new LatLng(location.getLatitude(), location.getLongitude()))  // Sets the center of the map to location user 
      .zoom(17)                 // Sets the zoom 
      .bearing(0)                // Sets the orientation of the camera to north 
      .tilt(40)                 // Sets the tilt of the camera to 30 degrees 
      .build();                 // Creates a CameraPosition from the builder 

    // Animate camera to zoom to the new position with defined settings 
    this.googleMap.animateCamera(CameraUpdateFactory.newCameraPosition(cameraPosition)); 

    Log.d("Device ID", this.getDeviceId()); 
    this.sendPost(location); 
} 

@Override 
public void onStatusChanged(String s, int i, Bundle bundle) { 

} 

@Override 
public void onProviderEnabled(String s) { 

} 

@Override 
public void onProviderDisabled(String s) { 

} 

private String getDeviceId() { 
    if (Build.VERSION.SDK_INT <= 25) { 
     return Build.SERIAL; 
    } else { 
     return Build.getSerial(); 
    } 
} 

private void sendPost(Location location) { 
    URL url = null; 
    HttpURLConnection httpURLConnection = null; 
    OutputStream outputStream = null; 

    try{ 
     url = new URL("http://example.local"); 
     httpURLConnection = (HttpURLConnection) url.openConnection(); 

     Timestamp timestamp = new Timestamp(System.currentTimeMillis()); 

     /*httpURLConnection.setRequestMethod("POST"); 
     httpURLConnection.setRequestProperty("d", this.getDeviceId()); 
     httpURLConnection.setRequestProperty("lat", Double.toString(location.getLatitude())); 
     httpURLConnection.setRequestProperty("lon", Double.toString(location.getLongitude())); 
     httpURLConnection.setRequestProperty("t", timestamp.toString()); 
     httpURLConnection.setDoOutput(true);*/ 

     outputStream = new BufferedOutputStream(httpURLConnection.getOutputStream()); 

     BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(outputStream, "UTF-8")); 

     writer.write(Double.toString(location.getLongitude())); 

     writer.flush(); 

     writer.close(); 

     outputStream.close(); 


     httpURLConnection.disconnect(); 

    } catch (MalformedURLException e) { 
     e.printStackTrace(); 
    } catch (IOException e) { 
     e.printStackTrace(); 
    } 
} 
} 

のですか？

ポストSending POST data in Androidは機能しません。

Answer 1

この例外は、アプリケーションがメインスレッドでネットワーク操作を実行しようとするとスローされます。 AsyncTaskでコードを実行します。

public class HttpPost extends AsyncTask<String, String, String> { 


    protected String doInBackground(String... args) { 
     URL url = null; 
     HttpURLConnection httpURLConnection = null; 
     OutputStream outputStream = null; 

     try{ 
      url = new URL("http://example.local"); 
      httpURLConnection = (HttpURLConnection) url.openConnection(); 

      Timestamp timestamp = new Timestamp(System.currentTimeMillis()); 

      /*httpURLConnection.setRequestMethod("POST"); 
      httpURLConnection.setRequestProperty("d", this.getDeviceId()); 
      httpURLConnection.setRequestProperty("lat", Double.toString(location.getLatitude())); 
      httpURLConnection.setRequestProperty("lon", Double.toString(location.getLongitude())); 
      httpURLConnection.setRequestProperty("t", timestamp.toString()); 
      httpURLConnection.setDoOutput(true);*/ 

      outputStream = new BufferedOutputStream(httpURLConnection.getOutputStream()); 

      BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(outputStream, "UTF-8")); 

      writer.write(Double.toString(location.getLongitude())); 
      writer.flush(); 
      writer.close(); 
      outputStream.close(); 
      httpURLConnection.disconnect(); 

      } catch (MalformedURLException e) { 
       e.printStackTrace(); 
      } catch (IOException e) { 
       e.printStackTrace(); 
      } 
    } 

    protected void onPostExecute(String result) { 
     //What you want to do with the result 
     //Call a callback function for instance 
     //You can also delete this method if you dont expect a result 
    } 
} 

Answer 2

投稿Sending POST data in Androidは機能しません。

上記は、受け入れられてupvoted状態になっていないはずです。

ことで作られたネットワーク呼び出しはあなたが1を下回る逃し

ANSどのよう逃したので、あなたは明らかになっているもののエラー。

パブリッククラスCallAPIは、プラットフォームのほとんどはまた、UIスレッドが許可されていない呼び出しネットワークAndroidや他のプラットフォームではAsyncTask {

を拡張します。 Android AsyncTaskでは、ネットワークからUiスレッドを呼び出す1つの方法です。