Develop Reference

How to send data from Raspberry pi to Google Cloud IoT Core, using Android Studio?

I'm doing Android Things project.
I want to publish a String message to Google Cloud IoT Core, but there are errors shown.
I'm using Raspberry Pi 3 with Android Things OS and and programming it using Android Studio.
Errors screenshot:
This is the whole code:
AndroidManifest.xml:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="cacaosd.com.sample1">
<!-- PAHO Permissions -->
<uses-permission android:name="android.permission.WAKE_LOCK" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
<!-- PAHO Permissions -->
<application>
<uses-library android:name="com.google.android.things"/>
<!-- Mqtt Service -->
<service android:name="org.eclipse.paho.android.service.MqttService" />
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.IOT_LAUNCHER"/>
<category android:name="android.intent.category.DEFAULT"/>
</intent-filter>
</activity>
</application>
</manifest>
IotCoreCommunicator Class
package cacaosd.com.sample1;
import android.content.Context;
import android.util.Log;
import java.util.concurrent.TimeUnit;
import org.eclipse.paho.android.service.MqttAndroidClient;
import org.eclipse.paho.client.mqttv3.IMqttActionListener;
import org.eclipse.paho.client.mqttv3.IMqttDeliveryToken;
import org.eclipse.paho.client.mqttv3.IMqttToken;
import org.eclipse.paho.client.mqttv3.MqttCallback;
import org.eclipse.paho.client.mqttv3.MqttConnectOptions;
import org.eclipse.paho.client.mqttv3.MqttException;
import org.eclipse.paho.client.mqttv3.MqttMessage;
public class IotCoreCommunicator {
private static final String SERVER_URI = "ssl://mqtt.googleapis.com:8883";
public static class Builder {
private Context context;
private String projectId;
private String cloudRegion;
private String registryId;
private String deviceId;
private int privateKeyRawFileId;
public Builder withContext(Context context) {
this.context = context;
return this;
}
public Builder withProjectId(String projectId) {
this.projectId = projectId;
return this;
}
public Builder withCloudRegion(String cloudRegion) {
this.cloudRegion = cloudRegion;
return this;
}
public Builder withRegistryId(String registryId) {
this.registryId = registryId;
return this;
}
public Builder withDeviceId(String deviceId) {
this.deviceId = deviceId;
return this;
}
public Builder withPrivateKeyRawFileId(int privateKeyRawFileId) {
this.privateKeyRawFileId = privateKeyRawFileId;
return this;
}
public IotCoreCommunicator build() {
if (context == null) {
throw new IllegalStateException("context must not be null");
}
if (projectId == null) {
throw new IllegalStateException("projectId must not be null");
}
if (cloudRegion == null) {
throw new IllegalStateException("cloudRegion must not be null");
}
if (registryId == null) {
throw new IllegalStateException("registryId must not be null");
}
if (deviceId == null) {
throw new IllegalStateException("deviceId must not be null");
}
String clientId = "projects/" + projectId + "/locations/" + cloudRegion + "/registries/" + registryId + "/devices/" + deviceId;
if (privateKeyRawFileId == 0) {
throw new IllegalStateException("privateKeyRawFileId must not be 0");
}
MqttAndroidClient client = new MqttAndroidClient(context, SERVER_URI, clientId);
IotCorePasswordGenerator passwordGenerator = new IotCorePasswordGenerator(projectId, context.getResources(), privateKeyRawFileId);
return new IotCoreCommunicator(client, deviceId, passwordGenerator);
}
}
private final MqttAndroidClient client;
private final String deviceId;
private final IotCorePasswordGenerator passwordGenerator;
IotCoreCommunicator(MqttAndroidClient client, String deviceId, IotCorePasswordGenerator passwordGenerator) {
this.client = client;
this.deviceId = deviceId;
this.passwordGenerator = passwordGenerator;
}
public void connect() {
monitorConnection();
clientConnect();
subscribeToConfigChanges();
}
private void monitorConnection() {
client.setCallback(new MqttCallback() {
#Override
public void connectionLost(Throwable cause) {
Log.e("TUT", "connection lost", cause);
}
#Override
public void messageArrived(String topic, MqttMessage message) throws Exception {
Log.d("TUT", "message arrived " + topic + " MSG " + message);
// You need to do something with messages when they arrive
}
#Override
public void deliveryComplete(IMqttDeliveryToken token) {
Log.d("TUT", "delivery complete " + token);
}
});
}
private void clientConnect() {
try {
MqttConnectOptions connectOptions = new MqttConnectOptions();
// Note that the the Google Cloud IoT Core only supports MQTT 3.1.1, and Paho requires that we explicitly set this.
// If you don't, the server will immediately close its connection to your device.
connectOptions.setMqttVersion(MqttConnectOptions.MQTT_VERSION_3_1_1);
// With Google Cloud IoT Core, the username field is ignored, however it must be set for the
// Paho client library to send the password field. The password field is used to transmit a JWT to authorize the device.
connectOptions.setUserName("unused-but-necessary");
connectOptions.setPassword(passwordGenerator.createJwtRsaPassword());
IMqttToken iMqttToken = client.connect(connectOptions);
iMqttToken.setActionCallback(new IMqttActionListener() {
#Override
public void onSuccess(IMqttToken asyncActionToken) {
Log.d("TUT", "success, connected");
}
#Override
public void onFailure(IMqttToken asyncActionToken, Throwable exception) {
Log.e("TUT", "failure, not connected", exception);
}
});
iMqttToken.waitForCompletion(TimeUnit.SECONDS.toMillis(30));
Log.d("TUT", "IoT Core connection established.");
} catch (MqttException e) {
throw new IllegalStateException(e);
}
}
/**
* Configuration is managed and sent from the IoT Core Platform
*/
private void subscribeToConfigChanges() {
try {
client.subscribe("/devices/" + deviceId + "/config", 1);
} catch (MqttException e) {
throw new IllegalStateException(e);
}
}
public void publishMessage(String subtopic, String message) {
String topic = "/devices/" + deviceId + "/" + subtopic;
String payload = "{msg:\"" + message + "\"}";
MqttMessage mqttMessage = new MqttMessage(payload.getBytes());
mqttMessage.setQos(1);
try {
client.publish(topic, mqttMessage);
Log.d("TUT", "IoT Core message published. To topic: " + topic);
} catch (MqttException e) {
throw new IllegalStateException(e);
}
}
public void disconnect() {
try {
Log.d("TUT", "IoT Core connection disconnected.");
client.disconnect();
} catch (MqttException e) {
throw new IllegalStateException(e);
}
}
}
IotCorePasswordGenerator Class
package cacaosd.com.sample1;
import android.content.res.Resources;
import android.util.Base64;
import java.io.IOException;
import java.io.InputStream;
import java.security.KeyFactory;
import java.security.NoSuchAlgorithmException;
import java.security.spec.InvalidKeySpecException;
import java.security.spec.PKCS8EncodedKeySpec;
import java.time.Duration;
import java.time.Instant;
import java.util.Date;
import io.jsonwebtoken.JwtBuilder;
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.SignatureAlgorithm;
class IotCorePasswordGenerator {
private final String projectId;
private final Resources resources;
private final int privateKeyRawFileId;
IotCorePasswordGenerator(String projectId, Resources resources, int privateKeyRawFileId) {
this.projectId = projectId;
this.resources = resources;
this.privateKeyRawFileId = privateKeyRawFileId;
}
char[] createJwtRsaPassword() {
try {
byte[] privateKeyBytes = decodePrivateKey(resources, privateKeyRawFileId);
return createJwtRsaPassword(projectId, privateKeyBytes).toCharArray();
} catch (NoSuchAlgorithmException e) {
throw new IllegalStateException("Algorithm not supported. (developer error)", e);
} catch (InvalidKeySpecException e) {
throw new IllegalStateException("Invalid Key spec. (developer error)", e);
} catch (IOException e) {
throw new IllegalStateException("Cannot read private key file.", e);
}
}
private static byte[] decodePrivateKey(Resources resources, int privateKeyRawFileId) throws IOException {
try(InputStream inStream = resources.openRawResource(privateKeyRawFileId)) {
return Base64.decode(inputToString(inStream), Base64.DEFAULT);
}
}
private static String inputToString(InputStream is) {
java.util.Scanner s = new java.util.Scanner(is).useDelimiter("\\A");
return s.hasNext() ? s.next() : "";
}
private static String createJwtRsaPassword(String projectId, byte[] privateKeyBytes) throws NoSuchAlgorithmException, InvalidKeySpecException {
return createPassword(projectId, privateKeyBytes, "RSA", SignatureAlgorithm.RS256);
}
private static String createPassword(String projectId, byte[] privateKeyBytes, String algorithmName, SignatureAlgorithm signatureAlgorithm) throws NoSuchAlgorithmException, InvalidKeySpecException {
Instant now = Instant.now();
// Create a JWT to authenticate this device. The device will be disconnected after the token
// expires, and will have to reconnect with a new token. The audience field should always be set
// to the GCP project id.
JwtBuilder jwtBuilder =
Jwts.builder()
.setIssuedAt(Date.from(now))
.setExpiration(Date.from(now.plus(Duration.ofMinutes(20))))
.setAudience(projectId);
PKCS8EncodedKeySpec spec = new PKCS8EncodedKeySpec(privateKeyBytes);
KeyFactory kf = KeyFactory.getInstance(algorithmName);
return jwtBuilder.signWith(signatureAlgorithm, kf.generatePrivate(spec)).compact();
}
}
MainActivity Class:
package cacaosd.com.sample1;
import android.app.Activity;
import android.hardware.SensorEvent;
import android.os.Bundle;
import android.os.HandlerThread;
import android.os.Handler;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.HandlerThread;
import android.util.Log;
import cacaosd.com.sample1.R;
import cacaosd.com.sample1.IotCoreCommunicator;
import com.google.android.things.pio.Gpio;
import java.io.IOException;
import java.util.concurrent.TimeUnit;
public class MainActivity extends Activity {
private IotCoreCommunicator communicator;
private Handler handler;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Setup the communication with your Google IoT Core details
communicator = new IotCoreCommunicator.Builder()
.withContext(this)
.withCloudRegion("us-central1") // ex: europe-west1
.withProjectId("my-first-project-198704") // ex: supercoolproject23236
.withRegistryId("vibration") // ex: my-devices
.withDeviceId("my-device") // ex: my-test-raspberry-pi
.withPrivateKeyRawFileId(R.raw.rsa_private)
.build();
HandlerThread thread = new HandlerThread("MyBackgroundThread");
thread.start();
handler = new Handler(thread.getLooper());
handler.post(connectOffTheMainThread); // Use whatever threading mechanism you want
}
private final Runnable connectOffTheMainThread = new Runnable() {
#Override
public void run() {
communicator.connect();
handler.post(sendMqttMessage);
}
};
private final Runnable sendMqttMessage = new Runnable() {
private int i;
/**
* We post 100 messages as an example, 1 a second
*/
#Override
public void run() {
if (i == 100) {
return;
}
// events is the default topic for MQTT communication
String subtopic = "events";
// Your message you want to send
String message = "Hello World " + i++;
communicator.publishMessage(subtopic, message);
handler.postDelayed(this, TimeUnit.SECONDS.toMillis(1));
}
};
#Override
protected void onDestroy() {
communicator.disconnect();
super.onDestroy();
}
}
Update:
I converted the private key from "pem" format to "pkcs8" format by following this documentation and this demo, then the error "Invalid key spec" is gone, but still there is a "FATAL EXCEPTION" and "java.lang.IllegalArgumentException: bad base-64" as shown in the image below:
[![enter image description here][4]][4]
It says that these are the related codes that caused the error (which shown in blue color in the previous image:
IotCorePasswordGenerator.java:47
return Base64.decode(inputToString(inStream), Base64.DEFAULT);
IotCorePasswordGenerator.java:34
byte[] privateKeyBytes = decodePrivateKey(resources, privateKeyRawFileId);
IotCoreCommunicator.java:135
connectOptions.setPassword(passwordGenerator.createJwtRsaPassword());
IotCoreCommunicator.java:101
clientConnect();
MainActivity.java:58
communicator.connect();
Update 2
I deleted the statement "-----BEGIN PRIVATE KEY-----" and the statement "------END PRIVATE KEY-----" and the error "bad base 64" is gone, Now there is another error which is "broken pipe" as shown in image below, when I reopen Android Studio and rebuild the project this error "broken pipe" removed, and when I run the project again it comes back again.
The error (first image)
Private key with start and end statements(second image)
Private key without start and end statements(third image)

From the error, it looks like you registered the device with the wrong type of SSL key. Verify that you created an SSL key that matches the format you specified in IoT Core. I.e. if you created an RSA key with the x509 certificate wrapper, be sure that your device is registered with that type and not just the RSA key.
Also be sure that the private key is actually on the device, and that it's not corrupted.
Edit: Problem may have been the roots.pem wasn't on device to handle the TLS handshake with IoT Core. We shall see... to get it, run: wget https://pki.google.com/roots.pem and put the roots.pem in the same directory as the private key on device.

I strongly recommend that you take a look at the Android Things connector for Cloud IoT core. This project makes it much easier to access Cloud IoT core from Android Things and handles various best practices such as token refresh.

Bluemix: How to insert JSON in Cloudant in Android with Replicator?

I am finding it difficult to make this simple upload. I've used all encontrandos tutorials on the internet such as Bluelist and android-sync. I already have a database created within the service. My code is as follows:
MainActivity.java
package com.example.engenharia.replicator;
import android.content.Context;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.Toast;
import com.cloudant.sync.datastore.BasicDocumentRevision;
import com.cloudant.sync.datastore.Datastore;
import com.cloudant.sync.datastore.DatastoreException;
import com.cloudant.sync.datastore.DatastoreManager;
import com.cloudant.sync.datastore.DocumentBodyFactory;
import com.cloudant.sync.datastore.DocumentException;
import com.cloudant.sync.datastore.DocumentRevision;
import com.cloudant.sync.datastore.MutableDocumentRevision;
import com.cloudant.sync.query.IndexManager;
import com.cloudant.sync.replication.ReplicatorBuilder;
import com.cloudant.sync.replication.Replicator;
import java.io.File;
import java.net.URI;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.CountDownLatch;
public class MainActivity extends AppCompatActivity {
private static final String DATASTORE_MANGER_DIR = "data";
private Datastore DataStore;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
try {
URI uri = new URI(my_uri);
File path = getApplicationContext().getDir(DATASTORE_MANGER_DIR, Context.MODE_PRIVATE);
DatastoreManager manager = new DatastoreManager(path.getAbsolutePath());
DataStore = manager.openDatastore("banco0"); //banco0 is the DB created in Cloudant NoSQL service.
// Create a replicator that replicates changes from the local
// datastore to the remote database.
Replicator replicator = ReplicatorBuilder.push().to(uri).from(DataStore).build();
// Use a CountDownLatch to provide a lightweight way to wait for completion
CountDownLatch latch = new CountDownLatch(1);
Listener listener = new Listener(latch);
replicator.getEventBus().register(listener);
replicator.start();
latch.await();
replicator.getEventBus().unregister(listener);
if(replicator.getState() != Replicator.State.COMPLETE){
System.out.println("Error replicating TO remote");
System.out.println(listener.error);
} else {
System.out.println(String.format("Replicated %d documents in %d batches",
listener.documentsReplicated, listener.batchesReplicated));
}
}catch (Exception e){
e.printStackTrace();
}
}
public DocumentRevision createDocument() {
MutableDocumentRevision rev = new MutableDocumentRevision();
rev.body = DocumentBodyFactory.create(HashMap());
try {
return DataStore.createDocumentFromRevision(rev);
} catch (DocumentException e) {
//throw new RuntimeException(e);
e.printStackTrace();
return null;
}
}
public Map<String, Object> HashMap() {
HashMap<String, Object> map = new HashMap<String, Object>();
HashMap<String, String> map1 = new HashMap<String, String>();
map1.put("Street", "121");
map1.put("Street1", "12112");
map1.put("Street123", "1211111");
String[] array1 = new String[]{"Cloudant", "NoSQL", "JSON"};
map.put("address", map1);
map.put("description", "This is sample description");
map.put("skills", array1);
return map;
}
}
listener.java
package com.example.engenharia.replicator;
import com.cloudant.sync.notifications.ReplicationCompleted;
import com.cloudant.sync.notifications.ReplicationErrored;
import com.cloudant.sync.replication.ErrorInfo;
import com.google.common.eventbus.Subscribe;
import com.cloudant.sync.replication.ReplicatorBuilder;
import com.cloudant.sync.replication.Replicator;
import java.util.concurrent.CountDownLatch;
/**
* Created by engenharia on 19/08/16.
*/
public class Listener {
private final CountDownLatch latch;
public ErrorInfo error = null;
public int documentsReplicated;
public int batchesReplicated;
Listener(CountDownLatch latch) {
this.latch = latch;
}
#Subscribe
public void complete(ReplicationCompleted event) {
this.documentsReplicated = event.documentsReplicated;
this.batchesReplicated = event.batchesReplicated;
latch.countDown();
}
#Subscribe
public void error(ReplicationErrored event) {
this.error = event.errorInfo;
latch.countDown();
}
}
Executing this code I have the follow error:
CouchException: error: forbidden, reason: server_admin access is
required for this request, statusCode: 403, msg: null, cause: null
But I am the admin!
How do I fix the problem or what is the solution?

Unable to get output from Pd library and Android app

I am trying to get a simple Android app working with the Pd library I have integrated within my eclipse environment.
I have successfully build and compiled an example project called "CircleOfFifths" which proves that the library has been integrated fine in eclipse.
I am using cordova/phonegap and trying to create a plugin for libpd. All the plugin communication with the javascript file on the front-end is working fine.
The code seems to initialise and load the patch fine. It also goes into the play() method but I don't get any output. I am expecting to hear the sine wave.
I followed this tutorial on YouTube.
My code can be viewed here, and the patch is here.
Can anyone help me figure out where I can be going wrong?
My ultimate objective is to use a live audio from microphone and process that audio and return immediately with applied Pd patch (patch is ready and created for this) but before I go to that stage I want to make sure that I get some sort of output from the existing patch. Same patch as the one above in the YouTube tutorial.
package com.test.libpd;
import java.io.File;
import java.io.IOException;
import org.apache.cordova.CallbackContext;
import org.apache.cordova.CordovaInterface;
import org.apache.cordova.CordovaPlugin;
import org.apache.cordova.CordovaWebView;
import org.json.JSONArray;
import org.json.JSONException;
import org.puredata.android.io.AudioParameters;
import org.puredata.android.io.PdAudio;
import org.puredata.android.utils.PdUiDispatcher;
import org.puredata.core.PdBase;
import org.puredata.core.utils.IoUtils;
import android.content.Context;
import android.util.Log;
import com.sgil.libpddemo.R;
public class Libpd extends CordovaPlugin {
private static final String TAG = "libpd_plugin";
private Exception exception;
private Context AppContext;
private PdUiDispatcher dispatcher;
private static final int MIN_SAMPLE_RATE = 44100;
public Libpd() { // constructor
}
private Context getApplicationContext() {
return this.cordova.getActivity().getApplicationContext();
}
public void initialize(CordovaInterface cordova, CordovaWebView webView) {
super.initialize(cordova, webView);
Log.v(TAG, "Init LIBPD PLUGIN");
}
public boolean execute(final String action, final JSONArray args,
final CallbackContext callbackContext) throws JSONException {
cordova.getActivity().runOnUiThread(new Runnable() {
// #SuppressLint("NewApi")
public void run() {
Log.v(TAG, "Plugin received:" + action);
Libpd libpd = new Libpd();
libpd.AppContext = getApplicationContext();
try {
libpd.initPd(libpd.AppContext);
libpd.loadPatch(libpd.AppContext);
} catch (IOException e) {
Log.e(TAG, e.toString());
// libpd.finish();
}
if (action.equals("playRec")) {
// MediaRecordMethod mediaRecordMethod = new
// MediaRecordMethod(action);
// mediaRecordMethod.init();
libpd.play();
}
if (action.equals("stopRec")) {
libpd.onPause();
}
if (action.equals("startRec")) {
libpd.record("start");
libpd.play();
}
}
});
return true;
}
private void initPd(Context ctx) throws IOException {
AudioParameters.init(ctx);
// Configure the audio glue
int sampleRate = AudioParameters.suggestSampleRate();
int srate = Math.max(MIN_SAMPLE_RATE, AudioParameters.suggestSampleRate());
// int sampleRate = 64;
int inpch = AudioParameters.suggestInputChannels();
int outpch = AudioParameters.suggestOutputChannels();
PdAudio.initAudio(srate, 0, outpch, 8, true);
// Create and install the dispatcher
dispatcher = new PdUiDispatcher();
PdBase.setReceiver(dispatcher);
}
private void loadPatch(Context ctx) throws IOException {
File dir = ctx.getFilesDir();
Log.v(TAG, "path:" + dir.getAbsolutePath().toString());
//File dir = new File("/sdcard/mypatches");
IoUtils.extractZipResource(
ctx.getResources().openRawResource(R.raw.simplepatch), dir, true);
File patchFile = new File(dir, "simplepatch.pd");
PdBase.openPatch(patchFile.getAbsolutePath());
//PdAudio.startAudio(ctx);
//this.record("start");
}
private void record(String startorStop) {
if (startorStop.equals("start")) {
PdBase.sendSymbol("recordfilename", "x.aiff");
PdBase.sendBang("openfile");
PdBase.sendBang("record");
} else {
PdBase.sendBang("stoprecording");
}
}
// play back the last recording from the file called 'recorded'
public void play() {
//PdBase.sendSymbol("playfilename", "x.aiff");
//PdBase.sendBang("readfile");
//PdBase.sendBang("play");
Float val = 1.0f;
PdBase.sendFloat("onOff", val);
}
protected void onPause() {
PdAudio.stopAudio();
PdAudio.release();
PdBase.release();
}
}

your code never starts the audio-processing.
For whatever reasons youhave uncommented the line
PdAudio.startAudio(ctx)

DalvikVm could not found class android library project

Need to tap the collective brain power here. I am trying out a very simple BindService and communicate with Messenger example. Since I am passing message object in the Message.obj field I defined messages in their own Android library project to be shared between service and the client. I can compile fine by including the message library as a depdendency but during runtime dalvikvm complains it could not find class. I have read other related issue dealing with export and orders but same solution doesn't help in my case. It must be a very simple mistake but I am pulling my hair out right now.
App depends on SupportServiceMessageLibrary.
App has library before its src in project's order tab.
Lib is not checked for export in App since no one is consuming the App
Library is exporting its src and gen folder.
The error message from log cat:
01-31 01:53:41.134: E/dalvikvm(22886): Could not find class 'com.example.service.RequestStatus', referenced from method com.example.MainActivity$ServiceReplyHandler.handleMessage
Here are snippet of code
MainActivity
package com.example;
import android.app.Activity;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.Bundle;
import android.os.Handler;
import android.os.IBinder;
import android.os.Message;
import android.os.Messenger;
import android.os.RemoteException;
import android.view.Menu;
import android.widget.TextView;
import com.example.appserver.R;
import com.example.service.MessageType;
import com.example.service.RequestStatus;
public class MainActivity extends Activity {
private TextView serverStatus;
/** Messenger for sending message to service. */
Messenger mServiceMessenger = null;
/** Flag indicating whether we have called bind on the service. */
boolean mBound;
/** Messenger for receiving message from service */
Messenger mClientMessenger = null;
class ServiceReplyHandler extends Handler {
#Override
public void handleMessage(Message msg) {
if (msg.what == MessageType.MSG_REPLY) {
RequestStatus reqStatus = (RequestStatus) msg.obj;
}
}
}
/**
* Class for interacting with the main interface of the service.
*/
private ServiceConnection mConnection = new ServiceConnection() {
public void onServiceConnected(ComponentName className, IBinder service) {
// This is called when the connection with the service has been
// established, giving us the object we can use to
// interact with the service. We are communicating with the
// service using a Messenger, so here we get a client-side
// representation of that from the raw IBinder object.
mServiceMessenger = new Messenger(service);
Message regMsg = Message.obtain(null,
MessageType.MSG_REGISTER);
regMsg.replyTo = mClientMessenger;
try {
mServiceMessenger.send(regMsg);
} catch (RemoteException e) {
}
mBound = true;
}
public void onServiceDisconnected(ComponentName className) {
// This is called when the connection with the service has been
// unexpectedly disconnected -- that is, its process crashed.
mServiceMessenger = null;
mBound = false;
}
};
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_server);
serverStatus = (TextView) findViewById(R.id.server_status);
Intent startServiceIntent = new Intent();
startServiceIntent.setComponent(new ComponentName(
"com.example.supportservices",
"com.example.service.EntitlementService"));
bindService(startServiceIntent, mConnection, Context.BIND_AUTO_CREATE);
// Initialize messenger to receiver service messages;
mClientMessenger = new Messenger(new ServiceReplyHandler());
}
#Override
protected void onStop() {
super.onStop();
}
#Override
protected void onStart() {
super.onStart();
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.server, menu);
return true;
}
}
And the message itself
package com.example.service;
import org.json.JSONException;
import org.json.JSONObject;
import android.text.TextUtils;
public class RequestStatus {
public static int REQUEST_SUCCESS = 0;
public static int REQUEST_FAILURE = 1;
public static String TYPE = "request_status";
public static String STATUS_JSON_KEY = "status";
private int status;
public RequestStatus(int status) {
this.status = status;
}
public static RequestStatus fromJson(String json) {
try {
JSONObject msg = new JSONObject(json);
String type = msg.getString("type");
if (TextUtils.isEmpty(type) || TYPE.equals(type) == false) {
return null;
}
return(new RequestStatus(msg.getJSONObject("body").getInt(STATUS_JSON_KEY)));
} catch (JSONException e) {
return null;
}
}
public String toJson() {
JSONObject msg = new JSONObject();
try {
msg.put("type", TYPE);
JSONObject body = new JSONObject();
body.put(STATUS_JSON_KEY, status);
msg.put("body", body);
} catch (JSONException e) {
return null;
}
return msg.toString();
}
}

Go to project property of the App and add it as a library under Android in addition to project dependency under build path.

webserver for file upload on android

I would like to add a webserver to my android application for uploading small files to the phone.
The user would start the webserver from the phone by hitting a button. He would then see an ip address that can be accessed by any browser from a pc. The website behind this ip address should show a file upload opportunity.
My question is: Is there an open source project similar to my needs? Or how would you recommend doing this?

you can use NanoHttpd link it's very weight android web server that is nicely embbedible..
package .....;
import java.io.IOException;
import java.util.Map.Entry;
import java.util.Properties;
import android.app.Activity;
import android.net.wifi.WifiManager;
import android.os.Bundle;
import android.os.Handler;
import android.widget.TextView;
public class AndroidWebServerActivity extends Activity {
private static final int PORT = 8765;
private TextView hello;
private MyHTTPD server;
private Handler handler = new Handler();
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
#Override
protected void onResume() {
super.onResume();
try {
server = new MyHTTPD();
} catch (IOException e) {
e.printStackTrace();
}
}
#Override
protected void onPause() {
super.onPause();
if (server != null)
server.stop();
}
private class MyHTTPD extends NanoHTTPD {
public MyHTTPD() throws IOException {
super(PORT, null);
}
#Override
public Response serve(String uri, String method, Properties header, Properties parms, Properties files) {
final StringBuilder buf = new StringBuilder();
for (Entry<Object, Object> kv : header.entrySet())
buf.append(kv.getKey() + " : " + kv.getValue() + "\n");
handler.post(new Runnable() {
#Override
public void run() {
}
});
final String html = "<html><head><head><body><h1>Hello, World</h1></body></html>";
return new NanoHTTPD.Response(HTTP_OK, MIME_HTML, html);
}
}
}