Verwenden von NanoHTTPD in Android

Question

Ich versuche, NanoHTTP zu verwenden, um eine HTML-Datei zu erstellen. Allerdings ist NanoHTTP relativ un-dokumentiert, und ich bin neu in Android. Meine Frage ist, wo ich die HTML-Datei speichern kann, und wie kann ich es mit NanoHTTP spezifisch bedienen.

Answer 1

Eine späte Antwort, kann aber für andere nützlich sein.

Hier ist ein einfacher Hallo Web Server, nicht genau das, was Sie fragen, aber Sie können von hier fortfahren. Das folgende Programm setzt voraus, dass Sie ein Verzeichnis www im Stammverzeichnis der SD-Karte und eine Datei index.html im Inneren haben.

Haupttätigkeit Httpd.java:

package com.inforscience.web; 

import android.app.Activity; 
import android.os.Bundle; 
import android.os.Environment; 
import android.util.Log; 
import java.io.*; 
import java.util.*; 


public class Httpd extends Activity 
{ 
    private WebServer server; 
    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) 
    { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.main); 
     server = new WebServer(); 
     try { 
      server.start(); 
     } catch(IOException ioe) { 
      Log.w("Httpd", "The server could not start."); 
     } 
     Log.w("Httpd", "Web server initialized."); 
    } 


    // DON'T FORGET to stop the server 
    @Override 
    public void onDestroy() 
    { 
     super.onDestroy(); 
     if (server != null) 
      server.stop(); 
    } 

    private class WebServer extends NanoHTTPD { 

     public WebServer() 
     { 
      super(8080); 
     } 

     @Override 
     public Response serve(String uri, Method method, 
           Map<String, String> header, 
           Map<String, String> parameters, 
           Map<String, String> files) { 
      String answer = ""; 
      try { 
       // Open file from SD Card 
       File root = Environment.getExternalStorageDirectory(); 
       FileReader index = new FileReader(root.getAbsolutePath() + 
         "/www/index.html"); 
       BufferedReader reader = new BufferedReader(index); 
       String line = ""; 
       while ((line = reader.readLine()) != null) { 
        answer += line; 
       } 
       reader.close(); 

      } catch(IOException ioe) { 
       Log.w("Httpd", ioe.toString()); 
      } 


      return new NanoHTTPD.Response(answer); 
     } 
    } 

} 

Offensichtlich ist die NanoHTTPD Klasse im selben Paket sein muss.

Sie müssen Internet-Erlaubnis in AndroidManifest.xml gewähren.

<uses-permission android:name="android.permission.INTERNET" /> 

und lesen Sie externe Speicherberechtigung.

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/> 

EDIT: Für den Zugriff auf den Server, den Sie Web-Browser mit der IP-Adresse Ihres Geräts öffnen, z.B. 192.168.1.20:8080.

NOTES:

• in Android 2.3 Getestete
• Die Verwendung von Port 80 zu dem Root-Benutzer beschränkt (http://www.mail-archive.com/android-developers@googlegroups.com/msg47377.html).

Answer 2

Ziemlich gut Quellcode kann hier gefunden werden: https://github.com/Teaonly/android-eye

Chceck Vermögenswerte Ordner, in dem HTML und JavaScript-Dateien https://github.com/Teaonly/android-eye/tree/master/assets

TeaServer gespeichert sind - Server-Implementierung https://github.com/Teaonly/android-eye/blob/master/src/teaonly/droideye/TeaServer.java

MainActivity - Server-Initialisierung https://github.com/Teaonly/android-eye/blob/master/src/teaonly/droideye/MainActivity.java

Answer 3

Aktualisiert WebServer Klasse (siehe rendon Antwort), die mit aktueller NanoHTTPD Version funktioniert:

private class WebServer extends NanoHTTPD { 

    public WebServer() { 
     super(8080); 
    } 

    @Override 
    public Response serve(IHTTPSession session) { 
     String answer = ""; 
     try { 
      // Open file from SD Card 
      File root = Environment.getExternalStorageDirectory(); 
      FileReader index = new FileReader(root.getAbsolutePath() + 
        "/www/index.html"); 
      BufferedReader reader = new BufferedReader(index); 
      String line = ""; 
      while ((line = reader.readLine()) != null) { 
       answer += line; 
      } 
      reader.close(); 

     } catch(IOException ioe) { 
      Log.w("Httpd", ioe.toString()); 
     } 

     return newFixedLengthResponse(answer); 
    } 

} 

Answer 4

Try this ... erstellen 2 Pakete (Aktivität, util), erstellen Sie nur für die Organisation In Tätigkeit AndroidWebServer.java

package awserverfatepi.com.activity; 
import android.content.BroadcastReceiver; 
import android.content.Context; 
import android.content.DialogInterface; 
import android.content.Intent; 
import android.content.IntentFilter; 
import android.net.ConnectivityManager; 
import android.net.NetworkInfo; 
import android.net.wifi.WifiManager; 
import android.support.design.widget.CoordinatorLayout; 
import android.support.design.widget.FloatingActionButton; 
import android.support.design.widget.Snackbar; 
import android.support.v4.content.ContextCompat; 
import android.support.v7.app.AlertDialog; 
import android.support.v7.app.AppCompatActivity; 
import android.os.Bundle; 
import android.view.KeyEvent; 
import android.view.View; 
import android.widget.EditText; 
import android.widget.TextView; 

import awserverfatepi.com.R; 
import awserverfatepi.com.util.AndroidWebServer; 

public class MainActivity extends AppCompatActivity { 

    private static final int DEFAULT_PORT = 8080; 

    private AndroidWebServer androidWebServer; 
    private BroadcastReceiver broadcastReceiverNetworkState; 
    private static boolean isStarted = false; 

    private CoordinatorLayout coordinatorLayout; 
    private EditText editTextPort; 
    private FloatingActionButton floatingActionButtonOnOff; 
    private View textViewMessage; 
    private TextView textViewIpAccess; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 

     initGui(); 
     setIpAccess(); 
     floatingActionButtonOnOff = (FloatingActionButton) findViewById(R.id.floatingActionButtonOnOff); 
     floatingActionButtonOnOff.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       if (isConnectedInWifi()) { 
        if (!isStarted && startAndroidWebServer()) { 
         isStarted = true; 
         textViewMessage.setVisibility(View.VISIBLE); 
         floatingActionButtonOnOff.setBackgroundTintList(ContextCompat.getColorStateList(MainActivity.this, 
           R.color.colorGreen)); 
         editTextPort.setEnabled(false); 
        } else if (stopAndroidWebServer()) { 
         isStarted = false; 
         textViewMessage.setVisibility(View.INVISIBLE); 
         floatingActionButtonOnOff.setBackgroundTintList(ContextCompat.getColorStateList(MainActivity.this, 
           R.color.colorRed)); 
         editTextPort.setEnabled(true); 
        } 
       } else { 
        Snackbar.make(coordinatorLayout, getString(R.string.wifi_message), Snackbar.LENGTH_LONG).show(); 
       } 
      } 
     }); 

     initBroadcastReceiverNetworkStateChanged(); 
    } 

    private void initGui() { 
     coordinatorLayout = (CoordinatorLayout) findViewById(R.id.coordinatorLayout); 
     editTextPort = (EditText) findViewById(R.id.editTextPort); 
     textViewMessage = findViewById(R.id.textViewMessage); 
     textViewIpAccess = (TextView) findViewById(R.id.textViewIpAccess); 
    } 

    private boolean startAndroidWebServer() { 
     if (!isStarted) { 
      int port = getPortFromEditText(); 
      try { 
       if (port == 0) { 
        throw new Exception(); 
       } 
       androidWebServer = new AndroidWebServer(port); 
       androidWebServer.start(); 
       return true; 
      } catch (Exception e) { 
       e.printStackTrace(); 
       Snackbar.make(coordinatorLayout, "A porta " + port + " não está funcionando, por favor altere para outra no intervalo" + 
         " entre 1000 e 9999.", Snackbar.LENGTH_LONG).show(); 
      } 
     } 
     return false; 
    } 

    private boolean stopAndroidWebServer() { 
     if (isStarted && androidWebServer != null) { 
      androidWebServer.stop(); 
      return true; 
     } 
     return false; 
    } 

    private void setIpAccess() { 
     textViewIpAccess.setText(getIpAccess()); 
    } 

    private void initBroadcastReceiverNetworkStateChanged() { 
     final IntentFilter filters = new IntentFilter(); 
     filters.addAction("android.net.wifi.WIFI_STATE_CHANGED"); 
     filters.addAction("android.net.wifi.STATE_CHANGE"); 
     broadcastReceiverNetworkState = new BroadcastReceiver() { 
      @Override 
      public void onReceive(Context context, Intent intent) { 
       setIpAccess(); 
      } 
     }; 
     super.registerReceiver(broadcastReceiverNetworkState, filters); 
    } 

    private String getIpAccess() { 
     WifiManager wifiManager = (WifiManager) getSystemService(WIFI_SERVICE); 
     int ipAddress = wifiManager.getConnectionInfo().getIpAddress(); 
     final String formatedIpAddress = String.format("%d.%d.%d.%d", (ipAddress & 0xff), (ipAddress >> 8 & 0xff), 
       (ipAddress >> 16 & 0xff), (ipAddress >> 24 & 0xff)); 
     return "http://" + formatedIpAddress + ":"; 
    } 

    private int getPortFromEditText() { 
     String valueEditText = editTextPort.getText().toString(); 
     return (valueEditText.length() > 0) ? Integer.parseInt(valueEditText) : DEFAULT_PORT; 
    } 

    public boolean isConnectedInWifi() { 
     WifiManager wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE); 
     NetworkInfo networkInfo = ((ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE)).getActiveNetworkInfo(); 
     if (networkInfo != null && networkInfo.isAvailable() && networkInfo.isConnected() 
       && wifiManager.isWifiEnabled() && networkInfo.getTypeName().equals("WIFI")) { 
      return true; 
     } 
     return false; 
    } 

    public boolean onKeyDown(int keyCode, KeyEvent evt) { 
     if (keyCode == KeyEvent.KEYCODE_BACK) { 
      if (isStarted) { 
       new AlertDialog.Builder(this) 
         .setTitle(R.string.warning) 
         .setMessage(R.string.dialog_exit_message) 
         .setPositiveButton(getResources().getString(android.R.string.ok), new DialogInterface.OnClickListener() { 
          public void onClick(DialogInterface dialog, int id) { 
           finish(); 
          } 
         }) 
         .setNegativeButton(getResources().getString(android.R.string.cancel), null) 
         .show(); 
      } else { 
       finish(); 
      } 
      return true; 
     } 
     return false; 
    } 

    @Override 
    protected void onDestroy() { 
     super.onDestroy(); 
     stopAndroidWebServer(); 
     isStarted = false; 
     if (broadcastReceiverNetworkState != null) { 
      unregisterReceiver(broadcastReceiverNetworkState); 
     } 
    } 

} 

im AndroidWebserver.java die Klasse MainActivity.java in util die Klasse erstellen

package awserverfatepi.com.util; 
import java.util.Map; 
import fi.iki.elonen.NanoHTTPD; 

public class AndroidWebServer extends NanoHTTPD { 

    public AndroidWebServer(int port) { 
     super(port); 
    } 

    public AndroidWebServer(String hostname, int port) { 
     super(hostname, port); 
    } 

    @Override 
    public Response serve(IHTTPSession session) { 
     String msg = "<html><body><h1>Hello World</h1>\n"; 
     Map<String, String> parms = session.getParms(); 
     if (parms.get("username") == null) { 
      msg += "<form action='?' method='get'>\n <p>Seu nome: <input type='text' name='username'></p>\n" + "</form>\n"; 
     } else { 
      msg += "<p>Hello, " + parms.get("username") + "!</p>"; 
     } 
     return newFixedLengthResponse(msg + "</body></html>\n"); 
    } 
} 

Manifest nicht vergessen.xml

<uses-permission android:name="android.permission.INTERNET" /> 
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" /> 
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> 
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> 

Und last

activity_main.xml

<?xml version="1.0" encoding="utf-8"?> 
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:app="http://schemas.android.com/apk/res-auto" 
    android:id="@+id/coordinatorLayout" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent"> 

    <LinearLayout 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     android:orientation="vertical"> 

     <ImageView 
      android:layout_width="match_parent" 
      android:layout_height="150dp" 
      android:scaleType="centerCrop" 
      android:src="@drawable/header" /> 

     <LinearLayout 
      android:layout_width="match_parent" 
      android:layout_height="0dp" 
      android:layout_weight="1" 
      android:background="@color/colorPrimaryLight" 
      android:gravity="center" 
      android:orientation="vertical"> 

      <LinearLayout 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:orientation="horizontal"> 

       <TextView 
        android:id="@+id/textViewIpAccess" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:text="http://000.000.000.000:" 
        android:textColor="@android:color/white" 
        android:textSize="20sp" 
        android:textStyle="bold" /> 

       <EditText 
        android:id="@+id/editTextPort" 
        android:layout_width="60dp" 
        android:layout_height="wrap_content" 
        android:gravity="center" 
        android:hint="8080" 
        android:inputType="numberDecimal" 
        android:maxLength="4" 
        android:text="8080" 
        android:textColor="@android:color/white" 
        android:textSize="20sp" 
        android:textStyle="bold" /> 

      </LinearLayout> 

      <TextView 
       android:id="@+id/textViewMessage" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:layout_marginLeft="50dp" 
       android:layout_marginRight="50dp" 
       android:layout_marginTop="50dp" 
       android:gravity="center" 
       android:text="@string/message" 
       android:textColor="@android:color/white" 
       android:textSize="18sp" 
       android:visibility="invisible" /> 

     </LinearLayout> 

    </LinearLayout> 

    <android.support.design.widget.FloatingActionButton 
     android:id="@+id/floatingActionButtonOnOff" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_gravity="end|bottom" 
     android:layout_margin="16dp" 
     android:elevation="4dp" 
     android:src="@drawable/on_btn" 
     app:backgroundTint="@color/colorRed" /> 

</android.support.design.widget.CoordinatorLayout>