Develop Reference

Broadcast receiver is not called on real devices

I have updated target version from Android 8 to Android 10 after that I am facing an issue that broadcast receiver is not being called on devices(I have tested on Samsung s9(Pie), Mi Note 5(Oreo)) accept Google Pixel 2 XL device(Android 10) but it's working fine on Genymotion Samsung s9 emulator or any emulator. Can anybody tell what could be the possible issue?
There is Service called SipService inside that it registering the Intent filters and we trigger one of the Intent filter from one of the activity. Some codes are as below.
ACtivity
inside onCreate() method
registerReceiver(registrationStateReceiver, new IntentFilter(SipManager.ACTION_SIP_REGISTRATION_CHANGED));
bindService(new Intent(mContext, SipService.class), connection, Context.BIND_AUTO_CREATE);
And after some Webservice calls and operation we are calling one of the registered Intent Filter as below.
Intent intent = new Intent(SipManager.ACTION_SIP_REQUEST_RESTART);
sendBroadcast(intent);
Inside SipService class
private void registerBroadcasts() {
// Register own broadcast receiver
if (deviceStateReceiver == null) {
IntentFilter intentfilter = new IntentFilter();
intentfilter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);
intentfilter.addAction(SipManager.ACTION_SIP_ACCOUNT_CHANGED);
intentfilter.addAction(SipManager.ACTION_SIP_ACCOUNT_DELETED);
intentfilter.addAction(SipManager.ACTION_SIP_CAN_BE_STOPPED);
intentfilter.addAction(SipManager.ACTION_SIP_REQUEST_RESTART);
intentfilter.addAction(DynamicReceiver4.ACTION_VPN_CONNECTIVITY);
if (Compatibility.isCompatible(5)) {
deviceStateReceiver = new DynamicReceiver5(this);
} else {
deviceStateReceiver = new DynamicReceiver4(this);
}
registerReceiver(deviceStateReceiver, intentfilter);
deviceStateReceiver.startMonitoring();
}
}
Receiver Class
public class DynamicReceiver4 extends BroadcastReceiver {
private static final String THIS_FILE = "DynamicReceiver";
// Comes from android.net.vpn.VpnManager.java
// Action for broadcasting a connectivity state.
public static final String ACTION_VPN_CONNECTIVITY = "vpn.connectivity";
/** Key to the connectivity state of a connectivity broadcast event. */
public static final String BROADCAST_CONNECTION_STATE = "connection_state";
private SipService service;
// Store current state
private String mNetworkType;
private boolean mConnected = false;
private String mRoutes = "";
private boolean hasStartedWifi = false;
private Timer pollingTimer;
/**
* Check if the intent received is a sticky broadcast one
* A compat way
* #param it intent received
* #return true if it's an initial sticky broadcast
*/
public boolean compatIsInitialStickyBroadcast(Intent it) {
if(ConnectivityManager.CONNECTIVITY_ACTION.equals(it.getAction())) {
if(!hasStartedWifi) {
hasStartedWifi = true;
return true;
}
}
return false;
}
public DynamicReceiver4(SipService aService) {
service = aService;
}
#Override
public void onReceive(final Context context, final Intent intent) {
// Run the handler in SipServiceExecutor to be protected by wake lock
service.getExecutor().execute(new SipService.SipRunnable() {
public void doRun() throws SipService.SameThreadException {
onReceiveInternal(context, intent, compatIsInitialStickyBroadcast(intent));
}
});
}
/**
* Internal receiver that will run on sip executor thread
* #param context Application context
* #param intent Intent received
* #throws SameThreadException
*/
private void onReceiveInternal(Context context, Intent intent, boolean isSticky) throws SipService.SameThreadException {
String action = intent.getAction();
Log.d(THIS_FILE, "Internal receive " + action);
if (action.equals(ConnectivityManager.CONNECTIVITY_ACTION)) {
ConnectivityManager cm =
(ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
onConnectivityChanged(activeNetwork, isSticky);
} else if (action.equals(SipManager.ACTION_SIP_ACCOUNT_CHANGED)) {
final long accountId = intent.getLongExtra(SipProfile.FIELD_ID, SipProfile.INVALID_ID);
// Should that be threaded?
if (accountId != SipProfile.INVALID_ID) {
final SipProfile account = service.getAccount(accountId);
if (account != null) {
Log.d(THIS_FILE, "Enqueue set account registration");
service.setAccountRegistration(account, account.active ? 1 : 0, true);
}
}
} else if (action.equals(SipManager.ACTION_SIP_ACCOUNT_DELETED)){
final long accountId = intent.getLongExtra(SipProfile.FIELD_ID, SipProfile.INVALID_ID);
if(accountId != SipProfile.INVALID_ID) {
final SipProfile fakeProfile = new SipProfile();
fakeProfile.id = accountId;
service.setAccountRegistration(fakeProfile, 0, true);
}
} else if (action.equals(SipManager.ACTION_SIP_CAN_BE_STOPPED)) {
service.cleanStop();
} else if (action.equals(SipManager.ACTION_SIP_REQUEST_RESTART)){
service.restartSipStack();
} else if(action.equals(ACTION_VPN_CONNECTIVITY)) {
onConnectivityChanged(null, isSticky);
}
}

Actually, My bad it was basically ABI(Application Binary Interface) issue that causing the issue in bit 64 devices.

Creating a vpn profile and connencting (PPTP) with username and password in android programmatically

I want to build an app that can connect with a single click of button which will create a vpn profile and connect to the vpn profile by parsig the username and password of the vpn server.
The code that is developed and modified is good to create and connect vpn but my vpn requires username and password to be entered so i want to do that programatically.
Here is my project
VpnClient.java
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.net.VpnService;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
public class VpnClient extends AppCompatActivity{
public interface Prefs {
String NAME = "connection";
String SERVER_ADDRESS = "server.address";
String SERVER_PORT = "server.port";
String SHARED_SECRET = "shared.secret";
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button disconnect = (Button) findViewById(R.id.disconnect);
Button connect = (Button) findViewById(R.id.connect);
// final TextView serverAddress = (TextView) findViewById(R.id.address);
//final TextView serverPort = (TextView) findViewById(R.id.port);
// final TextView sharedSecret = (TextView) findViewById(R.id.secret);
final SharedPreferences prefs = getSharedPreferences(Prefs.NAME, MODE_PRIVATE);
final String serverAddress = ""; !!I insert my vpnserver address in here which is my.vpnserver.com
final String serverPort = ""; !!As server port i am using 1723 for PPTP connection
connect.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
prefs.edit()
.putString(Prefs.SERVER_ADDRESS,"")
.putString(Prefs.SERVER_PORT, "")
.putString(Prefs.SHARED_SECRET, "")
.commit();
Intent intent = VpnService.prepare(VpnClient.this);
if (intent != null) {
startActivityForResult(intent, 0);
} else {
onActivityResult(0, RESULT_OK, null);
}
}
});
disconnect.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
startService(getServiceIntent().setAction(MyVpnService.ACTION_DISCONNECT));
}
});
}
#Override
protected void onActivityResult(int request, int result, Intent data) {
if (result == RESULT_OK) {
startService(getServiceIntent().setAction(MyVpnService.ACTION_CONNECT));
}
}
private Intent getServiceIntent() {
return new Intent(this, MyVpnService.class);
}
}
MyVpnService.java
import android.app.Notification;
import android.app.PendingIntent;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Build;
import android.os.Handler;
import android.os.Message;
import android.os.ParcelFileDescriptor;
import android.support.annotation.RequiresApi;
import android.support.v4.util.Pair;
import android.util.Log;
import android.widget.Toast;
import java.io.IOException;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicReference;
import java.util.logging.LogRecord;
public class MyVpnService extends andenter code hereroid.net.VpnService implements android.os.Handler.Callback {
private static final String TAG = MyVpnService.class.getSimpleName();
public static final String ACTION_CONNECT = "com.yaksh.vpn.START";
public static final String ACTION_DISCONNECT = "com.yaksh.vpn.STOP";
private Handler mHandler;
private static class Connection extends Pair<Thread, ParcelFileDescriptor> {
public Connection(Thread thread, ParcelFileDescriptor pfd) {
super(thread, pfd);
}
}
private final AtomicReference<Thread> mConnectingThread = new AtomicReference<>();
private final AtomicReference<Connection> mConnection = new AtomicReference<>();
private AtomicInteger mNextConnectionId = new AtomicInteger(1);
private PendingIntent mConfigureIntent;
#Override
public void onCreate() {
// The handler is only used to show messages.
if (mHandler == null) {
mHandler = new Handler(this);
}
// Create the intent to "configure" the connection (just start ToyVpnClient).
mConfigureIntent = PendingIntent.getActivity(this, 0, new Intent(this, VpnClient.class),
PendingIntent.FLAG_UPDATE_CURRENT);
}
#RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN)
#Override
public int onStartCommand(Intent intent, int flags, int startId) {
if (intent != null && ACTION_DISCONNECT.equals(intent.getAction())) {
disconnect();
return START_NOT_STICKY;
} else {
connect();
return START_STICKY;
}
}
#Override
public void onDestroy() {
disconnect();
}
#RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN)
#Override
public boolean handleMessage(Message message) {
Toast.makeText(this, message.what, Toast.LENGTH_SHORT).show();
if (message.what != R.string.disconnected) {
updateForegroundNotification(message.what);
}
return true;
}
#RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN)
private void connect() {
// Become a foreground service. Background services can be VPN services too, but they can
// be killed by background check before getting a chance to receive onRevoke().
updateForegroundNotification(R.string.connecting);
mHandler.sendEmptyMessage(R.string.connecting);
// Extract information from the shared preferences.
final SharedPreferences prefs = getSharedPreferences(VpnClient.Prefs.NAME, MODE_PRIVATE);
final String server = prefs.getString(VpnClient.Prefs.SERVER_ADDRESS, "");
final byte[] secret = prefs.getString(VpnClient.Prefs.SHARED_SECRET, "").getBytes();
final int port;
try {
port = Integer.parseInt(prefs.getString(VpnClient.Prefs.SERVER_PORT, ""));
} catch (NumberFormatException e) {
Log.e(TAG, "Bad port: " + prefs.getString(VpnClient.Prefs.SERVER_PORT, null), e);
return;
}
// Kick off a connection.
startConnection(new VpnConnection(
this, mNextConnectionId.getAndIncrement(), server, port, secret));
}
private void startConnection(final VpnConnection connection) {
// Replace any existing connecting thread with the new one.
final Thread thread = new Thread(connection, "ToyVpnThread");
setConnectingThread(thread);
// Handler to mark as connected once onEstablish is called.
connection.setConfigureIntent(mConfigureIntent);
connection.setOnEstablishListener(new VpnConnection.OnEstablishListener() {
public void onEstablish(ParcelFileDescriptor tunInterface) {
mHandler.sendEmptyMessage(R.string.connected);
mConnectingThread.compareAndSet(thread, null);
setConnection(new Connection(thread, tunInterface));
}
});
thread.start();
}
private void setConnectingThread(final Thread thread) {
final Thread oldThread = mConnectingThread.getAndSet(thread);
if (oldThread != null) {
oldThread.interrupt();
}
}
private void setConnection(final Connection connection) {
final Connection oldConnection = mConnection.getAndSet(connection);
if (oldConnection != null) {
try {
oldConnection.first.interrupt();
oldConnection.second.close();
} catch (IOException e) {
Log.e(TAG, "Closing VPN interface", e);
}
}
}
private void disconnect() {
mHandler.sendEmptyMessage(R.string.disconnected);
setConnectingThread(null);
setConnection(null);
stopForeground(true);
}
#RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN)
private void updateForegroundNotification(final int message) {
startForeground(1, new Notification.Builder(this)
.setSmallIcon(R.drawable.ic_vpn)
.setContentText(getString(message))
.setContentIntent(mConfigureIntent)
.build());
}
}
VpnConnection.java
import android.app.PendingIntent;
import android.os.Build;
import android.os.ParcelFileDescriptor;
import android.support.annotation.RequiresApi;
import android.util.Log;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.net.SocketAddress;
import java.net.SocketException;
import java.nio.ByteBuffer;
import java.nio.channels.DatagramChannel;
import java.util.concurrent.TimeUnit;
/**
* Created by Yaksh on 11/3/2017.
*/
public class VpnConnection implements Runnable{
/**
* Callback interface to let the {#link MyVpnService} know about new connections
* and update the foreground notification with connection status.
*/
public interface OnEstablishListener {
void onEstablish(ParcelFileDescriptor tunInterface);
}
/** Maximum packet size is constrained by the MTU, which is given as a signed short. */
private static final int MAX_PACKET_SIZE = Short.MAX_VALUE;
/** Time to wait in between losing the connection and retrying. */
private static final long RECONNECT_WAIT_MS = TimeUnit.SECONDS.toMillis(3);
/** Time between keepalives if there is no traffic at the moment.
*
* TODO: don't do this; it's much better to let the connection die and then reconnect when
* necessary instead of keeping the network hardware up for hours on end in between.
**/
private static final long KEEPALIVE_INTERVAL_MS = TimeUnit.SECONDS.toMillis(15);
/** Time to wait without receiving any response before assuming the server is gone. */
private static final long RECEIVE_TIMEOUT_MS = TimeUnit.SECONDS.toMillis(20);
/**
* Time between polling the VPN interface for new traffic, since it's non-blocking.
*
* TODO: really don't do this; a blocking read on another thread is much cleaner.
*/
private static final long IDLE_INTERVAL_MS = TimeUnit.MILLISECONDS.toMillis(100);
/**
* Number of periods of length {#IDLE_INTERVAL_MS} to wait before declaring the handshake a
* complete and abject failure.
*
* TODO: use a higher-level protocol; hand-rolling is a fun but pointless exercise.
*/
private static final int MAX_HANDSHAKE_ATTEMPTS = 50;
private final MyVpnService mService;
private final int mConnectionId;
private final String mServerName;
private final int mServerPort;
private final byte[] mSharedSecret;
private PendingIntent mConfigureIntent;
private OnEstablishListener mOnEstablishListener;
public VpnConnection(final MyVpnService service, final int connectionId,
final String serverName, final int serverPort, final byte[] sharedSecret) {
mService = service;
mConnectionId = connectionId;
mServerName = serverName;
mServerPort= serverPort;
mSharedSecret = sharedSecret;
}
/**
* Optionally, set an intent to configure the VPN. This is {#code null} by default.
*/
public void setConfigureIntent(PendingIntent intent) {
mConfigureIntent = intent;
}
public void setOnEstablishListener(OnEstablishListener listener) {
mOnEstablishListener = listener;
}
#RequiresApi(api = Build.VERSION_CODES.KITKAT)
#Override
public void run() {
try {
Log.i(getTag(), "Starting");
// If anything needs to be obtained using the network, get it now.
// This greatly reduces the complexity of seamless handover, which
// tries to recreate the tunnel without shutting down everything.
// In this demo, all we need to know is the server address.
final SocketAddress serverAddress = new InetSocketAddress(mServerName, mServerPort);
// We try to create the tunnel several times.
// network is available.
// Here we just use a counter to keep things simple.
for (int attempt = 0; attempt < 10; ++attempt) {
// Reset the counter if we were connected.
if (run(serverAddress)) {
attempt = 0;
}
// Sleep for a while. This also checks if we got interrupted.
Thread.sleep(3000);
}
Log.i(getTag(), "Giving up");
} catch (IOException | InterruptedException | IllegalArgumentException e) {
Log.e(getTag(), "Connection failed, exiting", e);
}
}
#RequiresApi(api = Build.VERSION_CODES.KITKAT)
private boolean run(SocketAddress server)
throws IOException, InterruptedException, IllegalArgumentException {
ParcelFileDescriptor iface = null;
boolean connected = false;
// Create a DatagramChannel as the VPN tunnel.
try (DatagramChannel tunnel = DatagramChannel.open()) {
// Protect the tunnel before connecting to avoid loopback.
if (!mService.protect(tunnel.socket())) {
throw new IllegalStateException("Cannot protect the tunnel");
}
// Connect to the server.
tunnel.connect(server);
// For simplicity, we use the same thread for both reading and
// writing. Here we put the tunnel into non-blocking mode.
tunnel.configureBlocking(false);
// Authenticate and configure the virtual network interface.
iface = handshake(tunnel);
// Now we are connected. Set the flag.
connected = true;
// Packets to be sent are queued in this input stream.
FileInputStream in = new FileInputStream(iface.getFileDescriptor());
// Packets received need to be written to this output stream.
FileOutputStream out = new FileOutputStream(iface.getFileDescriptor());
// Allocate the buffer for a single packet.
ByteBuffer packet = ByteBuffer.allocate(MAX_PACKET_SIZE);
// Timeouts:
// - when data has not been sent in a while, send empty keepalive messages.
// - when data has not been received in a while, assume the connection is broken.
long lastSendTime = System.currentTimeMillis();
long lastReceiveTime = System.currentTimeMillis();
// We keep forwarding packets till something goes wrong.
while (true) {
// Assume that we did not make any progress in this iteration.
boolean idle = true;
// Read the outgoing packet from the input stream.
int length = in.read(packet.array());
if (length > 0) {
// Write the outgoing packet to the tunnel.
packet.limit(length);
tunnel.write(packet);
packet.clear();
// There might be more outgoing packets.
idle = false;
lastReceiveTime = System.currentTimeMillis();
}
// Read the incoming packet from the tunnel.
length = tunnel.read(packet);
if (length > 0) {
// Ignore control messages, which start with zero.
if (packet.get(0) != 0) {
// Write the incoming packet to the output stream.
out.write(packet.array(), 0, length);
}
packet.clear();
// There might be more incoming packets.
idle = false;
lastSendTime = System.currentTimeMillis();
}
// If we are idle or waiting for the network, sleep for a
// fraction of time to avoid busy looping.
if (idle) {
Thread.sleep(IDLE_INTERVAL_MS);
final long timeNow = System.currentTimeMillis();
if (lastSendTime + KEEPALIVE_INTERVAL_MS <= timeNow) {
// We are receiving for a long time but not sending.
// Send empty control messages.
packet.put((byte) 0).limit(1);
for (int i = 0; i < 3; ++i) {
packet.position(0);
tunnel.write(packet);
}
packet.clear();
lastSendTime = timeNow;
} else if (lastReceiveTime + RECEIVE_TIMEOUT_MS <= timeNow) {
// We are sending for a long time but not receiving.
throw new IllegalStateException("Timed out");
}
}
}
} catch (SocketException e) {
Log.e(getTag(), "Cannot use socket", e);
} finally {
if (iface != null) {
try {
iface.close();
} catch (IOException e) {
Log.e(getTag(), "Unable to close interface", e);
}
}
}
return connected;
}
private ParcelFileDescriptor handshake(DatagramChannel tunnel)
throws IOException, InterruptedException {
// To build a secured tunnel, we should perform mutual authentication
// and exchange session keys for encryption. To keep things simple in
// this demo, we just send the shared secret in plaintext and wait
// for the server to send the parameters.
// Allocate the buffer for handshaking. We have a hardcoded maximum
// handshake size of 1024 bytes, which should be enough for demo
// purposes.
ByteBuffer packet = ByteBuffer.allocate(1024);
// Control messages always start with zero.
packet.put((byte) 0).put(mSharedSecret).flip();
// Send the secret several times in case of packet loss.
for (int i = 0; i < 3; ++i) {
packet.position(0);
tunnel.write(packet);
}
packet.clear();
// Wait for the parameters within a limited time.
for (int i = 0; i < MAX_HANDSHAKE_ATTEMPTS; ++i) {
Thread.sleep(IDLE_INTERVAL_MS);
// Normally we should not receive random packets. Check that the first
// byte is 0 as expected.
int length = tunnel.read(packet);
if (length > 0 && packet.get(0) == 0) {
return configure(new String(packet.array(), 1, length - 1).trim());
}
}
throw new IOException("Timed out");
}
private ParcelFileDescriptor configure(String parameters) throws IllegalArgumentException {
// Configure a builder while parsing the parameters.
MyVpnService.Builder builder = mService.new Builder();
for (String parameter : parameters.split(" ")) {
String[] fields = parameter.split(",");
try {
switch (fields[0].charAt(0)) {
case 'm':
builder.setMtu(Short.parseShort(fields[1]));
break;
case 'a':
builder.addAddress(fields[1], Integer.parseInt(fields[2]));
break;
case 'r':
builder.addRoute(fields[1], Integer.parseInt(fields[2]));
break;
case 'd':
builder.addDnsServer(fields[1]);
break;
case 's':
builder.addSearchDomain(fields[1]);
break;
}
} catch (NumberFormatException e) {
throw new IllegalArgumentException("Bad parameter: " + parameter);
}
}
// Create a new interface using the builder and save the parameters.
final ParcelFileDescriptor vpnInterface;
synchronized (mService) {
vpnInterface = builder
.setSession(mServerName)
.setConfigureIntent(mConfigureIntent)
.establish();
if (mOnEstablishListener != null) {
mOnEstablishListener.onEstablish(vpnInterface);
}
}
Log.i(getTag(), "New interface: " + vpnInterface + " (" + parameters + ")");
return vpnInterface;
}
private final String getTag() {
return VpnConnection.class.getSimpleName() + "[" + mConnectionId + "]";
}
}

Android Studio: Bluetooth Low Energy BLE Advertisements

on line 370 i need a way to look for a string of 'f's' in the advertisement data from a TI CC2650. I found this template online but I'm looking for specific advertising data. Please let me know what string array I need to look at to find this.
package net.jmodwyer.beacon.beaconPoC;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.app.DialogFragment;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.IntentSender;
import android.content.SharedPreferences;
import android.location.Location;
import android.os.Bundle;
import android.os.RemoteException;
import android.preference.PreferenceManager;
import android.text.util.Linkify;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ScrollView;
import android.widget.Toast;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GooglePlayServicesClient;
import com.google.android.gms.location.LocationClient;
import net.jmodwyer.ibeacon.ibeaconPoC.R;
import org.altbeacon.beacon.Beacon;
import org.altbeacon.beacon.BeaconConsumer;
import org.altbeacon.beacon.BeaconManager;
import org.altbeacon.beacon.RangeNotifier;
import org.altbeacon.beacon.Region;
import org.altbeacon.beacon.utils.UrlBeaconUrlCompressor;
import java.util.Collection;
import java.util.HashMap;
import java.util.Iterator;
/**
* Adapted from original code written by D Young of Radius Networks.
* #author dyoung, jodwyer
*
*/
public class ScanActivity extends Activity implements BeaconConsumer,
GooglePlayServicesClient.ConnectionCallbacks,
GooglePlayServicesClient.OnConnectionFailedListener {
// Constant Declaration
private static final String PREFERENCE_SCANINTERVAL = "scanInterval";
private static final String PREFERENCE_TIMESTAMP = "timestamp";
private static final String PREFERENCE_POWER = "power";
private static final String PREFERENCE_PROXIMITY = "proximity";
private static final String PREFERENCE_RSSI = "rssi";
private static final String PREFERENCE_MAJORMINOR = "majorMinor";
private static final String PREFERENCE_UUID = "uuid";
private static final String PREFERENCE_INDEX = "index";
private static final String PREFERENCE_LOCATION = "location";
private static final String PREFERENCE_REALTIME = "realTimeLog";
private static final String MODE_SCANNING = "Stop Scanning";
private static final String MODE_STOPPED = "Start Scanning";
protected static final String TAG = "ScanActivity";
/*
* Define a request code to send to Google Play services
* This code is returned in Activity.onActivityResult
*/
private final static int
CONNECTION_FAILURE_RESOLUTION_REQUEST = 9000;
private FileHelper fileHelper;
private BeaconManager beaconManager;
private Region region;
private int eventNum = 1;
// This StringBuffer will hold the scan data for any given scan.
private StringBuffer logString;
// Preferences - will actually have a boolean value when loaded.
private Boolean index;
private Boolean location;
private Boolean uuid;
private Boolean majorMinor;
private Boolean rssi;
private Boolean proximity;
private Boolean power;
private Boolean timestamp;
private String scanInterval;
// Added following a feature request from D.Schmid.
private Boolean realTimeLog;
// LocationClient for Google Play Location Services
LocationClient locationClient;
private ScrollView scroller;
private EditText editText;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_scan);
verifyBluetooth();
PreferenceManager.setDefaultValues(this, R.xml.preferences, false);
BeaconScannerApp app = (BeaconScannerApp)this.getApplication();
beaconManager = app.getBeaconManager();
//beaconManager.setForegroundScanPeriod(10);
region = app.getRegion();
beaconManager.bind(this);
locationClient = new LocationClient(this, this, this);
fileHelper = app.getFileHelper();
scroller = (ScrollView)ScanActivity.this.findViewById(R.id.scanScrollView);
editText = (EditText)ScanActivity.this.findViewById(R.id.scanText);
// Initialise scan button.
getScanButton().setText(MODE_STOPPED);
}
#Override
public void onResume() {
super.onResume();
beaconManager.bind(this);
}
#Override
public void onPause() {
super.onPause();
// Uncommenting the following leak prevents a ServiceConnection leak when using the back
// arrow in the Action Bar to come out of the file list screen. Unfortunately it also kills
// background scanning, and as I have no workaround right now I'm settling for the lesser of
// two evils.
// beaconManager.unbind(this);
}
public String getCurrentLocation() {
/** Default "error" value is set for location, will be overwritten with the correct lat and
* long values if we're ble to connect to location services and get a reading.
*/
String location = "Unavailable";
if (locationClient.isConnected()) {
Location currentLocation = locationClient.getLastLocation();
if (currentLocation != null) {
location = Double.toString(currentLocation.getLatitude()) + "," +
Double.toString(currentLocation.getLongitude());
}
}
return location;
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.main_activity_actions, menu);
return super.onCreateOptionsMenu(menu);
}
#Override
public void onBeaconServiceConnect() {}
/**
*
* #param view
*/
public void onScanButtonClicked(View view) {
toggleScanState();
}
// Handle the user selecting "Settings" from the action bar.
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.Settings:
// Show settings
Intent api = new Intent(this, AppPreferenceActivity.class);
startActivityForResult(api, 0);
return true;
case R.id.action_listfiles:
// Launch list files activity
Intent fhi = new Intent(this, FileHandlerActivity.class);
startActivity(fhi);
return true;
default:
return super.onOptionsItemSelected(item);
}
}
/**
* Start and stop scanning, and toggle button label appropriately.
*/
private void toggleScanState() {
Button scanButton = getScanButton();
String currentState = scanButton.getText().toString();
if (currentState.equals(MODE_SCANNING)) {
stopScanning(scanButton);
} else {
startScanning(scanButton);
}
}
/**
* start looking for beacons.
*/
private void startScanning(Button scanButton) {
// Set UI elements to the correct state.
scanButton.setText(MODE_SCANNING);
((EditText)findViewById(R.id.scanText)).setText("");
// Reset event counter
eventNum = 1;
// Get current values for logging preferences
SharedPreferences sharedPrefs = PreferenceManager.getDefaultSharedPreferences(this);
HashMap <String, Object> prefs = new HashMap<String, Object>();
prefs.putAll(sharedPrefs.getAll());
index = (Boolean)prefs.get(PREFERENCE_INDEX);
location = (Boolean)prefs.get(PREFERENCE_LOCATION);
uuid = (Boolean)prefs.get(PREFERENCE_UUID);
majorMinor = (Boolean)prefs.get(PREFERENCE_MAJORMINOR);
rssi = (Boolean)prefs.get(PREFERENCE_RSSI);
proximity = (Boolean)prefs.get(PREFERENCE_PROXIMITY);
power = (Boolean)prefs.get(PREFERENCE_POWER);
timestamp = (Boolean)prefs.get(PREFERENCE_TIMESTAMP);
scanInterval = (String)prefs.get(PREFERENCE_SCANINTERVAL);
realTimeLog = (Boolean)prefs.get(PREFERENCE_REALTIME);
// Get current background scan interval (if specified)
if (prefs.get(PREFERENCE_SCANINTERVAL) != null) {
beaconManager.setBackgroundBetweenScanPeriod(Long.parseLong(scanInterval));
}
logToDisplay("Scanning...");
// Initialise scan log
logString = new StringBuffer();
//Start scanning again.
beaconManager.setRangeNotifier(new RangeNotifier() {
#Override
public void didRangeBeaconsInRegion(Collection<Beacon> beacons, Region region) {
if (beacons.size() > 0) {
Iterator <Beacon> beaconIterator = beacons.iterator();
while (beaconIterator.hasNext()) {
Beacon beacon = beaconIterator.next();
// Debug - logging a beacon - checking background logging is working.
System.out.println("Logging another beacon.");
logBeaconData(beacon);
}
}
}
});
try {
beaconManager.startRangingBeaconsInRegion(region);
} catch (RemoteException e) {
// TODO - OK, what now then?
}
}
/**
* Stop looking for beacons.
*/
private void stopScanning(Button scanButton) {
try {
beaconManager.stopRangingBeaconsInRegion(region);
} catch (RemoteException e) {
// TODO - OK, what now then?
}
String scanData = logString.toString();
if (scanData.length() > 0) {
// Write file
fileHelper.createFile(scanData);
// Display file created message.
Toast.makeText(getBaseContext(),
"File saved to:" + getFilesDir().getAbsolutePath(),
Toast.LENGTH_SHORT).show();
scanButton.setText(MODE_STOPPED);
} else {
// We didn't get any data, so there's no point writing an empty file.
Toast.makeText(getBaseContext(),
"No data captured during scan, output file will not be created.",
Toast.LENGTH_SHORT).show();
scanButton.setText(MODE_STOPPED);
}
}
/**
*
* #return reference to the start/stop scanning button
*/
private Button getScanButton() {
return (Button)findViewById(R.id.scanButton);
}
/**
*
* #param beacon The detected beacon
*/
private void logBeaconData(Beacon beacon) {
StringBuilder scanString = new StringBuilder();
if (index) {
scanString.append(eventNum++);
}
if (beacon.getServiceUuid() == 0xfeaa) {
if (beacon.getBeaconTypeCode() == 0x00) {
scanString.append(" Eddystone-UID -> ");
scanString.append(" Namespace : ").append(beacon.getId1());
scanString.append(" Identifier : ").append(beacon.getId2());
logEddystoneTelemetry(scanString, beacon);
} else if (beacon.getBeaconTypeCode() == 0x10) {
String url = UrlBeaconUrlCompressor.uncompress(beacon.getId1().toByteArray());
scanString.append(" Eddystone-URL -> " + url);
} else if (beacon.getBeaconTypeCode() == 0x20) {
scanString.append(" Eddystone-TLM -> ");
logEddystoneTelemetry(scanString, beacon);
}
} else {
// Just an old fashioned iBeacon or AltBeacon...
logGenericBeacon(scanString, beacon);
}
logToDisplay(scanString.toString());
scanString.append("\n");
// Code added following a feature request by D.Schmid - writes a single entry to a file
// every time a beacon is detected, the file will only ever have one entry as it will be
// recreated on each call to this method.
// Get current background scan interval (if specified)
if (realTimeLog) {
// We're in realtime logging mode, create a new log file containing only this entry.
fileHelper.createFile(scanString.toString(), "realtimelog.txt");
}
logString.append(scanString.toString());
}
/**
* Logs iBeacon & AltBeacon data.
*/
private void logGenericBeacon(StringBuilder scanString, Beacon beacon) {
// Comment stuff out for whatever reason
/*
if (location) {
scanString.append(" Location: ").append(getCurrentLocation()).append(" ");
}
`
*/
if (uuid) {
scanString.append(" UUID: ").append(beacon.getId1());
if (beacon.getId1().equals("ffffffff-ffff-ffff-ffff-ffffffffffff ")){
scanString.append("WE DID IT!!!!!!!!!!!");
}else{
scanString.append(" WE DID NOT DO IT =( ");
}
/*
if ((beacon.getId1()).equals ("f")){
scanString.append("WE DID IT!!!!!!!!!!!");
}else{
scanString.append(" WE DID NOT DO IT!!!!!!!!!!! ");
}
*/
}
// Making if statements to test for advertising data
/*
if (majorMinor) {
scanString.append(" Maj. Mnr.: ");
if (beacon.getId2() != null) {
scanString.append(beacon.getId2());
}
scanString.append("-");
if (beacon.getId3() != null) {
scanString.append(beacon.getId3());
}
}
if (rssi) {
scanString.append(" RSSI: ").append(beacon.getRssi());
}
if (proximity) {
scanString.append(" Proximity: ").append(BeaconHelper.getProximityString(beacon.getDistance()));
}
if (power) {
scanString.append(" Power: ").append(beacon.getTxPower());
}
if (timestamp) {
scanString.append(" Timestamp: ").append(BeaconHelper.getCurrentTimeStamp());
} */
}
private void logEddystoneTelemetry(StringBuilder scanString, Beacon beacon) {
// Do we have telemetry data?
if (beacon.getExtraDataFields().size() > 0) {
long telemetryVersion = beacon.getExtraDataFields().get(0);
long batteryMilliVolts = beacon.getExtraDataFields().get(1);
long pduCount = beacon.getExtraDataFields().get(3);
long uptime = beacon.getExtraDataFields().get(4);
scanString.append(" Telemetry version : " + telemetryVersion);
scanString.append(" Uptime (sec) : " + uptime);
scanString.append(" Battery level (mv) " + batteryMilliVolts);
scanString.append(" Tx count: " + pduCount);
}
}
/**
*
* #param line
*/
private void logToDisplay(final String line) {
runOnUiThread(new Runnable() {
public void run() {
editText.append(line + "\n");
// Temp code - don't really want to do this for every line logged, will look for a
// workaround.
Linkify.addLinks(editText, Linkify.WEB_URLS);
scroller.fullScroll(View.FOCUS_DOWN);
}
});
}
private void verifyBluetooth() {
try {
if (!BeaconManager.getInstanceForApplication(this).checkAvailability()) {
final AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Bluetooth not enabled");
builder.setMessage("Please enable bluetooth in settings and restart this application.");
builder.setPositiveButton(android.R.string.ok, null);
builder.setOnDismissListener(new DialogInterface.OnDismissListener() {
#Override
public void onDismiss(DialogInterface dialog) {
finish();
System.exit(0);
}
});
builder.show();
}
}
catch (RuntimeException e) {
final AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Bluetooth LE not available");
builder.setMessage("Sorry, this device does not support Bluetooth LE.");
builder.setPositiveButton(android.R.string.ok, null);
builder.setOnDismissListener(new DialogInterface.OnDismissListener() {
#Override
public void onDismiss(DialogInterface dialog) {
finish();
System.exit(0);
}
});
builder.show();
}
}
/* Location services code follows */
#Override
protected void onStart() {
super.onStart();
// Connect the client.
locationClient.connect();
}
#Override
protected void onStop() {
// Disconnect the client.
locationClient.disconnect();
super.onStop();
}
#Override
public void onConnected(Bundle dataBundle) {
// Uncomment the following line to display the connection status.
// Toast.makeText(this, "Connected", Toast.LENGTH_SHORT).show();
}
#Override
public void onDisconnected() {
// Display the connection status
Toast.makeText(this, "Disconnected. Please re-connect.",
Toast.LENGTH_SHORT).show();
}
#Override
public void onConnectionFailed(ConnectionResult connectionResult) {
/* Google Play services can resolve some errors it detects.
* If the error has a resolution, try sending an Intent to
* start a Google Play services activity that can resolve
* error.
*/
if (connectionResult.hasResolution()) {
try {
// Start an Activity that tries to resolve the error
connectionResult.startResolutionForResult(
this,
CONNECTION_FAILURE_RESOLUTION_REQUEST);
/*
* Thrown if Google Play services canceled the original
* PendingIntent
*/
} catch (IntentSender.SendIntentException e) {
// Log the error
e.printStackTrace();
}
} else {
/*
* If no resolution is available, display a dialog to the
* user with the error.
*/
Toast.makeText(getBaseContext(),
"Location services not available, cannot track device location.",
Toast.LENGTH_SHORT).show();
}
}
// Define a DialogFragment that displays the error dialog
public static class ErrorDialogFragment extends DialogFragment {
// Global field to contain the error dialog
private Dialog mDialog;
// Default constructor. Sets the dialog field to null
public ErrorDialogFragment() {
super();
mDialog = null;
}
// Set the dialog to display
public void setDialog(Dialog dialog) {
mDialog = dialog;
}
// Return a Dialog to the DialogFragment.
#Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
return mDialog;
}
}
/*
* Handle results returned to the FragmentActivity
* by Google Play services
*/
#Override
protected void onActivityResult(
int requestCode, int resultCode, Intent data) {
// Decide what to do based on the original request code
switch (requestCode) {
case CONNECTION_FAILURE_RESOLUTION_REQUEST :
/*
* If the result code is Activity.RESULT_OK, try
* to connect again
*/
switch (resultCode) {
case Activity.RESULT_OK :
/*
* TODO - Try the request again
*/
break;
}
}
}
}

Need to cast to string first .toString
if (uuid) {
scanString.append(" UUID: ").append(beacon.getId1());
// Making if statements to look for all f's in advertising data
if (beacon.getId1().toString().equals(Str1)){
scanString.append("\nAlarm ACTIVATED\n");
}else{
scanString.append("\n Alarm NOT active\n");
}
}

android : open chrome custom tab from fragment

I have one Activity MainActivity. It contains a ViewPager hosting a fragment FragmentPlaceHolder. This fragment has a RecyclerView.
Now, on a click of a particular view, say button, inside a RecyclerView item, I want to open a chrome custom tab in new Activity. Can anyone help me with this one ? I am expecting a step wise implemention of Chrome Custom tabs.
Thanks.

So, I did it this way:
First of all, add this following dependency in build.gradle(app):
compile 'com.android.support:customtabs:23.1.1'
First create an activity WebviewActivity:
WebViewActivity.java
public class WebviewActivity extends AppCompatActivity {
public static final String EXTRA_URL = "extra.url";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_webview);
String url = getIntent().getStringExtra(EXTRA_URL);
WebView webView = (WebView)findViewById(R.id.webview);
webView.setWebViewClient(new WebViewClient());
WebSettings webSettings = webView.getSettings();
webSettings.setJavaScriptEnabled(true);
setTitle(url);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
webView.loadUrl(url);
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
// Respond to the action bar's Up/Home button
case android.R.id.home:
finish();
return true;
}
return super.onOptionsItemSelected(item);
}
}
Now, say on button click you want to open chrome custom tab and load www.google.com, so, do it as below:
public void onButtonClick(View view){
CustomTabsIntent customTabsIntent = new CustomTabsIntent.Builder().build();
CustomTabActivityHelper.openCustomTab(
this,// activity
customTabsIntent,
Uri.parse("http://www.google.com"),
new WebviewFallback()
);
}
activity_webview.xml
<?xml version="1.0" encoding="utf-8"?>
<!-- Copyright 2015 Google Inc. All Rights Reserved.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
-->
<WebView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/webview"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context=".helpers.WebviewActivity" />
Then, simply craete the classes as below:
CustomTabActivityHelper.java
import android.app.Activity;
import android.net.Uri;
import android.os.Bundle;
import android.support.customtabs.CustomTabsClient;
import android.support.customtabs.CustomTabsIntent;
import android.support.customtabs.CustomTabsServiceConnection;
import android.support.customtabs.CustomTabsSession;
import java.util.List;
/**
* This is a helper class to manage the connection to the Custom Tabs Service.
*/
public class CustomTabActivityHelper implements ServiceConnectionCallback {
private CustomTabsSession mCustomTabsSession;
private CustomTabsClient mClient;
private CustomTabsServiceConnection mConnection;
private ConnectionCallback mConnectionCallback;
/**
* Opens the URL on a Custom Tab if possible. Otherwise fallsback to opening it on a WebView.
*
* #param activity The host activity.
* #param customTabsIntent a CustomTabsIntent to be used if Custom Tabs is available.
* #param uri the Uri to be opened.
* #param fallback a CustomTabFallback to be used if Custom Tabs is not available.
*/
public static void openCustomTab(Activity activity,
CustomTabsIntent customTabsIntent,
Uri uri,
CustomTabFallback fallback) {
String packageName = CustomTabsHelper.getPackageNameToUse(activity);
//If we cant find a package name, it means theres no browser that supports
//Chrome Custom Tabs installed. So, we fallback to the webview
if (packageName == null) {
if (fallback != null) {
fallback.openUri(activity, uri);
}
} else {
customTabsIntent.intent.setPackage(packageName);
customTabsIntent.launchUrl(activity, uri);
}
}
/**
* Unbinds the Activity from the Custom Tabs Service.
*
* #param activity the activity that is connected to the service.
*/
public void unbindCustomTabsService(Activity activity) {
if (mConnection == null) return;
activity.unbindService(mConnection);
mClient = null;
mCustomTabsSession = null;
mConnection = null;
}
/**
* Creates or retrieves an exiting CustomTabsSession.
*
* #return a CustomTabsSession.
*/
public CustomTabsSession getSession() {
if (mClient == null) {
mCustomTabsSession = null;
} else if (mCustomTabsSession == null) {
mCustomTabsSession = mClient.newSession(null);
}
return mCustomTabsSession;
}
/**
* Register a Callback to be called when connected or disconnected from the Custom Tabs Service.
*
* #param connectionCallback
*/
public void setConnectionCallback(ConnectionCallback connectionCallback) {
this.mConnectionCallback = connectionCallback;
}
/**
* Binds the Activity to the Custom Tabs Service.
*
* #param activity the activity to be binded to the service.
*/
public void bindCustomTabsService(Activity activity) {
if (mClient != null) return;
String packageName = CustomTabsHelper.getPackageNameToUse(activity);
if (packageName == null) return;
mConnection = new ServiceConnection(this);
CustomTabsClient.bindCustomTabsService(activity, packageName, mConnection);
}
/**
* #return true if call to mayLaunchUrl was accepted.
* #see {#link CustomTabsSession#mayLaunchUrl(Uri, Bundle, List)}.
*/
public boolean mayLaunchUrl(Uri uri, Bundle extras, List<Bundle> otherLikelyBundles) {
if (mClient == null) return false;
CustomTabsSession session = getSession();
if (session == null) return false;
return session.mayLaunchUrl(uri, extras, otherLikelyBundles);
}
#Override
public void onServiceConnected(CustomTabsClient client) {
mClient = client;
mClient.warmup(0L);
if (mConnectionCallback != null) mConnectionCallback.onCustomTabsConnected();
}
#Override
public void onServiceDisconnected() {
mClient = null;
mCustomTabsSession = null;
if (mConnectionCallback != null) mConnectionCallback.onCustomTabsDisconnected();
}
/**
* A Callback for when the service is connected or disconnected. Use those callbacks to
* handle UI changes when the service is connected or disconnected.
*/
public interface ConnectionCallback {
/**
* Called when the service is connected.
*/
void onCustomTabsConnected();
/**
* Called when the service is disconnected.
*/
void onCustomTabsDisconnected();
}
/**
* To be used as a fallback to open the Uri when Custom Tabs is not available.
*/
public interface CustomTabFallback {
/**
* #param activity The Activity that wants to open the Uri.
* #param uri The uri to be opened by the fallback.
*/
void openUri(Activity activity, Uri uri);
}
}
CustomTabsHelper.java
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.net.Uri;
import android.text.TextUtils;
import android.util.Log;
import java.util.ArrayList;
import java.util.List;
/**
* Helper class for Custom Tabs.
*/
public class CustomTabsHelper {
private static final String TAG = "CustomTabsHelper";
static final String STABLE_PACKAGE = "com.android.chrome";
static final String BETA_PACKAGE = "com.chrome.beta";
static final String DEV_PACKAGE = "com.chrome.dev";
static final String LOCAL_PACKAGE = "com.google.android.apps.chrome";
private static final String EXTRA_CUSTOM_TABS_KEEP_ALIVE =
"android.support.customtabs.extra.KEEP_ALIVE";
private static final String ACTION_CUSTOM_TABS_CONNECTION =
"android.support.customtabs.action.CustomTabsService";
private static String sPackageNameToUse;
private CustomTabsHelper() {}
public static void addKeepAliveExtra(Context context, Intent intent) {
Intent keepAliveIntent = new Intent().setClassName(
context.getPackageName(), KeepAliveService.class.getCanonicalName());
intent.putExtra(EXTRA_CUSTOM_TABS_KEEP_ALIVE, keepAliveIntent);
}
/**
* Goes through all apps that handle VIEW intents and have a warmup service. Picks
* the one chosen by the user if there is one, otherwise makes a best effort to return a
* valid package name.
*
* This is <strong>not</strong> threadsafe.
*
* #param context {#link Context} to use for accessing {#link PackageManager}.
* #return The package name recommended to use for connecting to custom tabs related components.
*/
public static String getPackageNameToUse(Context context) {
if (sPackageNameToUse != null) return sPackageNameToUse;
PackageManager pm = context.getPackageManager();
// Get default VIEW intent handler.
Intent activityIntent = new Intent(Intent.ACTION_VIEW, Uri.parse("http://www.example.com"));
ResolveInfo defaultViewHandlerInfo = pm.resolveActivity(activityIntent, 0);
String defaultViewHandlerPackageName = null;
if (defaultViewHandlerInfo != null) {
defaultViewHandlerPackageName = defaultViewHandlerInfo.activityInfo.packageName;
}
// Get all apps that can handle VIEW intents.
List<ResolveInfo> resolvedActivityList = pm.queryIntentActivities(activityIntent, 0);
List<String> packagesSupportingCustomTabs = new ArrayList<>();
for (ResolveInfo info : resolvedActivityList) {
Intent serviceIntent = new Intent();
serviceIntent.setAction(ACTION_CUSTOM_TABS_CONNECTION);
serviceIntent.setPackage(info.activityInfo.packageName);
if (pm.resolveService(serviceIntent, 0) != null) {
packagesSupportingCustomTabs.add(info.activityInfo.packageName);
}
}
// Now packagesSupportingCustomTabs contains all apps that can handle both VIEW intents
// and service calls.
if (packagesSupportingCustomTabs.isEmpty()) {
sPackageNameToUse = null;
} else if (packagesSupportingCustomTabs.size() == 1) {
sPackageNameToUse = packagesSupportingCustomTabs.get(0);
} else if (!TextUtils.isEmpty(defaultViewHandlerPackageName)
&& !hasSpecializedHandlerIntents(context, activityIntent)
&& packagesSupportingCustomTabs.contains(defaultViewHandlerPackageName)) {
sPackageNameToUse = defaultViewHandlerPackageName;
} else if (packagesSupportingCustomTabs.contains(STABLE_PACKAGE)) {
sPackageNameToUse = STABLE_PACKAGE;
} else if (packagesSupportingCustomTabs.contains(BETA_PACKAGE)) {
sPackageNameToUse = BETA_PACKAGE;
} else if (packagesSupportingCustomTabs.contains(DEV_PACKAGE)) {
sPackageNameToUse = DEV_PACKAGE;
} else if (packagesSupportingCustomTabs.contains(LOCAL_PACKAGE)) {
sPackageNameToUse = LOCAL_PACKAGE;
}
return sPackageNameToUse;
}
/**
* Used to check whether there is a specialized handler for a given intent.
* #param intent The intent to check with.
* #return Whether there is a specialized handler for the given intent.
*/
private static boolean hasSpecializedHandlerIntents(Context context, Intent intent) {
try {
PackageManager pm = context.getPackageManager();
List<ResolveInfo> handlers = pm.queryIntentActivities(
intent,
PackageManager.GET_RESOLVED_FILTER);
if (handlers == null || handlers.size() == 0) {
return false;
}
for (ResolveInfo resolveInfo : handlers) {
IntentFilter filter = resolveInfo.filter;
if (filter == null) continue;
if (filter.countDataAuthorities() == 0 || filter.countDataPaths() == 0) continue;
if (resolveInfo.activityInfo == null) continue;
return true;
}
} catch (RuntimeException e) {
Log.e(TAG, "Runtime exception while getting specialized handlers");
}
return false;
}
/**
* #return All possible chrome package names that provide custom tabs feature.
*/
public static String[] getPackages() {
return new String[]{"", STABLE_PACKAGE, BETA_PACKAGE, DEV_PACKAGE, LOCAL_PACKAGE};
}
}
ServiceConnection.java
import android.content.ComponentName;
import android.support.customtabs.CustomTabsClient;
import android.support.customtabs.CustomTabsServiceConnection;
import java.lang.ref.WeakReference;
/**
* Implementation for the CustomTabsServiceConnection that avoids leaking the
* ServiceConnectionCallback
*/
public class ServiceConnection extends CustomTabsServiceConnection {
// A weak reference to the ServiceConnectionCallback to avoid leaking it.
private WeakReference<ServiceConnectionCallback> mConnectionCallback;
public ServiceConnection(ServiceConnectionCallback connectionCallback) {
mConnectionCallback = new WeakReference<>(connectionCallback);
}
#Override
public void onCustomTabsServiceConnected(ComponentName name, CustomTabsClient client) {
ServiceConnectionCallback connectionCallback = mConnectionCallback.get();
if (connectionCallback != null) connectionCallback.onServiceConnected(client);
}
#Override
public void onServiceDisconnected(ComponentName name) {
ServiceConnectionCallback connectionCallback = mConnectionCallback.get();
if (connectionCallback != null) connectionCallback.onServiceDisconnected();
}
}
ServiceConnectionCallback.java
import android.support.customtabs.CustomTabsClient;
/**
* Callback for events when connecting and disconnecting from Custom Tabs Service.
*/
public interface ServiceConnectionCallback {
/**
* Called when the service is connected.
* #param client a CustomTabsClient
*/
void onServiceConnected(CustomTabsClient client);
/**
* Called when the service is disconnected.
*/
void onServiceDisconnected();
}
WebviewFallback.java
import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
/**
* A Fallback that opens a Webview when Custom Tabs is not available
*/
public class WebviewFallback implements CustomTabActivityHelper.CustomTabFallback {
#Override
public void openUri(Activity activity, Uri uri) {
Intent intent = new Intent(activity, WebviewActivity.class);
intent.putExtra(WebviewActivity.EXTRA_URL, uri.toString());
activity.startActivity(intent);
}
}
By now, you should be able to open Chrome custom tab.
If found any issue with this, just let me know.

#Chintan Soni's answer is absolutely correct for Android SDK versions lower than 21.
For higher versions when querying activities that can handle the intent in getPackageNameToUse() function pass flag PackageManager.MATCH_ALL like this.
if (Build.VERSION.SDK_INT > Build.VERSION_CODES.LOLLIPOP_MR1)
resolvedActivityList = pm.queryIntentActivities(activityIntent,
PackageManager.MATCH_ALL);
else
resolvedActivityList = pm.queryIntentActivities(activityIntent, 0);

add next string to tour code before WebSettings webSettings
webView.setWebViewClient(new WebViewClient());

Expansion File (Android): "Download failed because the resources could not be found"

I am facing a problem with an expansion file process, I do not know what the problem is. I hope if someone could help.
I have followed the steps by Google; yet I cannot assure I have done it correctly 100%.
/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
*/
import com.android.vending.expansion.zipfile.ZipResourceFile;
import com.android.vending.expansion.zipfile.ZipResourceFile.ZipEntryRO;
import com.google.android.vending.expansion.downloader.Constants;
import com.google.android.vending.expansion.downloader.DownloadProgressInfo;
import com.google.android.vending.expansion.downloader.DownloaderClientMarshaller;
import com.google.android.vending.expansion.downloader.DownloaderServiceMarshaller;
import com.google.android.vending.expansion.downloader.Helpers;
import com.google.android.vending.expansion.downloader.IDownloaderClient;
import com.google.android.vending.expansion.downloader.IDownloaderService;
import com.google.android.vending.expansion.downloader.IStub;
import android.app.Activity;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager.NameNotFoundException;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Messenger;
import android.os.SystemClock;
import android.provider.Settings;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.ProgressBar;
import android.widget.TextView;
import java.io.DataInputStream;
import java.io.IOException;
import java.util.zip.CRC32;
/**
* This is sample code for a project built against the downloader library. It
* implements the IDownloaderClient that the client marshaler will talk to as
* messages are delivered from the DownloaderService.
*/
public class ExpansionFileDownloaderActivity extends Activity implements IDownloaderClient {
private static final String LOG_TAG = "LVLDownloader";
private ProgressBar mPB;
private TextView mStatusText;
private TextView mProgressFraction;
private TextView mProgressPercent;
private TextView mAverageSpeed;
private TextView mTimeRemaining;
private View mDashboard;
private View mCellMessage;
private Button mPauseButton;
private Button mWiFiSettingsButton;
private boolean mStatePaused;
private int mState;
private IDownloaderService mRemoteService;
private IStub mDownloaderClientStub;
private void setState(int newState) {
if (mState != newState) {
mState = newState;
mStatusText.setText(Helpers.getDownloaderStringResourceIDFromState(newState));
}
}
private void setButtonPausedState(boolean paused) {
mStatePaused = paused;
int stringResourceID = paused ? R.string.text_button_resume :
R.string.text_button_pause;
mPauseButton.setText(stringResourceID);
}
/**
* This is a little helper class that demonstrates simple testing of an
* Expansion APK file delivered by Market. You may not wish to hard-code
* things such as file lengths into your executable... and you may wish to
* turn this code off during application development.
*/
private static class XAPKFile {
public final boolean mIsMain;
public final int mFileVersion;
public final long mFileSize;
XAPKFile(boolean isMain, int fileVersion, long fileSize) {
mIsMain = isMain;
mFileVersion = fileVersion;
mFileSize = fileSize;
}
}
/**
* Here is where you place the data that the validator will use to determine
* if the file was delivered correctly. This is encoded in the source code
* so the application can easily determine whether the file has been
* properly delivered without having to talk to the server. If the
* application is using LVL for licensing, it may make sense to eliminate
* these checks and to just rely on the server.
*/
private static final XAPKFile[] xAPKS = {
new XAPKFile(
true, // true signifies a main file
1, // the version of the APK that the file was uploaded
// against
102459993L // the length of the file in bytes
)
};
/**
* Go through each of the APK Expansion files defined in the structure above
* and determine if the files are present and match the required size. Free
* applications should definitely consider doing this, as this allows the
* application to be launched for the first time without having a network
* connection present. Paid applications that use LVL should probably do at
* least one LVL check that requires the network to be present, so this is
* not as necessary.
*
* #return true if they are present.
*/
boolean expansionFilesDelivered() {
for (XAPKFile xf : xAPKS) {
String fileName = Helpers.getExpansionAPKFileName(this, xf.mIsMain, xf.mFileVersion);
if (!Helpers.doesFileExist(this, fileName, xf.mFileSize, false))
return false;
}
return true;
}
public static boolean expansionFilesDelivered(Context ctx) {
for (XAPKFile xf : xAPKS) {
String fileName = Helpers.getExpansionAPKFileName(ctx, xf.mIsMain, xf.mFileVersion);
if (!Helpers.doesFileExist(ctx, fileName, xf.mFileSize, false))
return false;
}
return true;
}
/**
* Calculating a moving average for the validation speed so we don't get
* jumpy calculations for time etc.
*/
static private final float SMOOTHING_FACTOR = 0.005f;
/**
* Used by the async task
*/
private boolean mCancelValidation;
/**
* Go through each of the Expansion APK files and open each as a zip file.
* Calculate the CRC for each file and return false if any fail to match.
*
* #return true if XAPKZipFile is successful
*/
void validateXAPKZipFiles() {
AsyncTask<Object, DownloadProgressInfo, Boolean> validationTask = new AsyncTask<Object, DownloadProgressInfo, Boolean>() {
#Override
protected void onPreExecute() {
mDashboard.setVisibility(View.VISIBLE);
mCellMessage.setVisibility(View.GONE);
mStatusText.setText(R.string.text_verifying_download);
mPauseButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
mCancelValidation = true;
}
});
mPauseButton.setText(R.string.text_button_cancel_verify);
super.onPreExecute();
}
#Override
protected Boolean doInBackground(Object... params) {
for (XAPKFile xf : xAPKS) {
String fileName = Helpers.getExpansionAPKFileName(
ExpansionFileDownloaderActivity.this,
xf.mIsMain, xf.mFileVersion);
if (!Helpers.doesFileExist(ExpansionFileDownloaderActivity.this, fileName,
xf.mFileSize, false))
return false;
fileName = Helpers
.generateSaveFileName(ExpansionFileDownloaderActivity.this, fileName);
ZipResourceFile zrf;
byte[] buf = new byte[1024 * 256];
try {
zrf = new ZipResourceFile(fileName);
ZipEntryRO[] entries = zrf.getAllEntries();
/**
* First calculate the total compressed length
*/
long totalCompressedLength = 0;
for (ZipEntryRO entry : entries) {
totalCompressedLength += entry.mCompressedLength;
}
float averageVerifySpeed = 0;
long totalBytesRemaining = totalCompressedLength;
long timeRemaining;
/**
* Then calculate a CRC for every file in the Zip file,
* comparing it to what is stored in the Zip directory.
* Note that for compressed Zip files we must extract
* the contents to do this comparison.
*/
for (ZipEntryRO entry : entries) {
if (-1 != entry.mCRC32) {
long length = entry.mUncompressedLength;
CRC32 crc = new CRC32();
DataInputStream dis = null;
try {
dis = new DataInputStream(
zrf.getInputStream(entry.mFileName));
long startTime = SystemClock.uptimeMillis();
while (length > 0) {
int seek = (int) (length > buf.length ? buf.length
: length);
dis.readFully(buf, 0, seek);
crc.update(buf, 0, seek);
length -= seek;
long currentTime = SystemClock.uptimeMillis();
long timePassed = currentTime - startTime;
if (timePassed > 0) {
float currentSpeedSample = (float) seek
/ (float) timePassed;
if (0 != averageVerifySpeed) {
averageVerifySpeed = SMOOTHING_FACTOR
* currentSpeedSample
+ (1 - SMOOTHING_FACTOR)
* averageVerifySpeed;
} else {
averageVerifySpeed = currentSpeedSample;
}
totalBytesRemaining -= seek;
timeRemaining = (long) (totalBytesRemaining / averageVerifySpeed);
this.publishProgress(
new DownloadProgressInfo(
totalCompressedLength,
totalCompressedLength
- totalBytesRemaining,
timeRemaining,
averageVerifySpeed
)
);
}
startTime = currentTime;
if (mCancelValidation)
return true;
}
if (crc.getValue() != entry.mCRC32) {
Log.e(Constants.TAG,
"CRC does not match for entry: "
+ entry.mFileName
);
Log.e(Constants.TAG,
"In file: " + entry.getZipFileName());
return false;
}
} finally {
if (null != dis) {
dis.close();
}
}
}
}
} catch (IOException e) {
e.printStackTrace();
return false;
}
}
return true;
}
#Override
protected void onProgressUpdate(DownloadProgressInfo... values) {
onDownloadProgress(values[0]);
super.onProgressUpdate(values);
}
#Override
protected void onPostExecute(Boolean result) {
if (result) {
mDashboard.setVisibility(View.VISIBLE);
mCellMessage.setVisibility(View.GONE);
mStatusText.setText(R.string.text_validation_complete);
mPauseButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
finish();
}
});
mPauseButton.setText(android.R.string.ok);
} else {
mDashboard.setVisibility(View.VISIBLE);
mCellMessage.setVisibility(View.GONE);
mStatusText.setText(R.string.text_validation_failed);
mPauseButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
finish();
}
});
mPauseButton.setText(android.R.string.cancel);
}
super.onPostExecute(result);
}
};
validationTask.execute(new Object());
}
/**
* If the download isn't present, we initialize the download UI. This ties
* all of the controls into the remote service calls.
*/
private void initializeDownloadUI() {
mDownloaderClientStub = DownloaderClientMarshaller.CreateStub
(this, SampleDownloaderService.class);
setContentView(R.layout.downloader_ui);
mPB = (ProgressBar) findViewById(R.id.progressBar);
mStatusText = (TextView) findViewById(R.id.statusText);
mProgressFraction = (TextView) findViewById(R.id.progressAsFraction);
mProgressPercent = (TextView) findViewById(R.id.progressAsPercentage);
mAverageSpeed = (TextView) findViewById(R.id.progressAverageSpeed);
mTimeRemaining = (TextView) findViewById(R.id.progressTimeRemaining);
mDashboard = findViewById(R.id.downloaderDashboard);
mCellMessage = findViewById(R.id.approveCellular);
mPauseButton = (Button) findViewById(R.id.pauseButton);
mWiFiSettingsButton = (Button) findViewById(R.id.wifiSettingsButton);
mPauseButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if (mStatePaused) {
mRemoteService.requestContinueDownload();
} else {
mRemoteService.requestPauseDownload();
}
setButtonPausedState(!mStatePaused);
}
});
mWiFiSettingsButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
startActivity(new Intent(Settings.ACTION_WIFI_SETTINGS));
}
});
Button resumeOnCell = (Button) findViewById(R.id.resumeOverCellular);
resumeOnCell.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
mRemoteService.setDownloadFlags(IDownloaderService.FLAGS_DOWNLOAD_OVER_CELLULAR);
mRemoteService.requestContinueDownload();
mCellMessage.setVisibility(View.GONE);
}
});
}
/**
* Called when the activity is first create; we wouldn't create a layout in
* the case where we have the file and are moving to another activity
* without downloading.
*/
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
/**
* Both downloading and validation make use of the "download" UI
*/
initializeDownloadUI();
/**
* Before we do anything, are the files we expect already here and
* delivered (presumably by Market) For free titles, this is probably
* worth doing. (so no Market request is necessary)
*/
if (!expansionFilesDelivered()) {
try {
Intent launchIntent = ExpansionFileDownloaderActivity.this
.getIntent();
Intent intentToLaunchThisActivityFromNotification = new Intent(
ExpansionFileDownloaderActivity
.this, ((Object) this).getClass() //..... this.getClass()
);
intentToLaunchThisActivityFromNotification.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK |
Intent.FLAG_ACTIVITY_CLEAR_TOP);
intentToLaunchThisActivityFromNotification.setAction(launchIntent.getAction());
if (launchIntent.getCategories() != null) {
for (String category : launchIntent.getCategories()) {
intentToLaunchThisActivityFromNotification.addCategory(category);
}
}
// Build PendingIntent used to open this activity from
// Notification
PendingIntent pendingIntent = PendingIntent.getActivity(
ExpansionFileDownloaderActivity.this,
0, intentToLaunchThisActivityFromNotification,
PendingIntent.FLAG_UPDATE_CURRENT);
// Request to start the download
int startResult = DownloaderClientMarshaller.startDownloadServiceIfRequired(this,
pendingIntent, SampleDownloaderService.class);
if (startResult != DownloaderClientMarshaller.NO_DOWNLOAD_REQUIRED) {
// The DownloaderService has started downloading the files,
// show progress
initializeDownloadUI();
return;
} // otherwise, download not needed so we fall through to
// starting the movie
} catch (NameNotFoundException e) {
Log.e(LOG_TAG, "Cannot find own package! MAYDAY!");
e.printStackTrace();
}
} else {
validateXAPKZipFiles();
}
}
/**
* Connect the stub to our service on start.
*/
#Override
protected void onStart() {
if (null != mDownloaderClientStub) {
mDownloaderClientStub.connect(this);
}
super.onStart();
}
/**
* Disconnect the stub from our service on stop
*/
#Override
protected void onStop() {
if (null != mDownloaderClientStub) {
mDownloaderClientStub.disconnect(this);
}
super.onStop();
}
/**
* Critical implementation detail. In onServiceConnected we create the
* remote service and marshaler. This is how we pass the client information
* back to the service so the client can be properly notified of changes. We
* must do this every time we reconnect to the service.
*/
#Override
public void onServiceConnected(Messenger m) {
mRemoteService = DownloaderServiceMarshaller.CreateProxy(m);
mRemoteService.onClientUpdated(mDownloaderClientStub.getMessenger());
}
/**
* The download state should trigger changes in the UI --- it may be useful
* to show the state as being indeterminate at times. This sample can be
* considered a guideline.
*/
#Override
public void onDownloadStateChanged(int newState) {
setState(newState);
boolean showDashboard = true;
boolean showCellMessage = false;
boolean paused;
boolean indeterminate;
switch (newState) {
case IDownloaderClient.STATE_IDLE:
// STATE_IDLE means the service is listening, so it's
// safe to start making calls via mRemoteService.
paused = false;
indeterminate = true;
break;
case IDownloaderClient.STATE_CONNECTING:
case IDownloaderClient.STATE_FETCHING_URL:
showDashboard = true;
paused = false;
indeterminate = true;
break;
case IDownloaderClient.STATE_DOWNLOADING:
paused = false;
showDashboard = true;
indeterminate = false;
break;
case IDownloaderClient.STATE_FAILED_CANCELED:
case IDownloaderClient.STATE_FAILED:
case IDownloaderClient.STATE_FAILED_FETCHING_URL:
case IDownloaderClient.STATE_FAILED_UNLICENSED:
paused = true;
showDashboard = false;
indeterminate = false;
break;
case IDownloaderClient.STATE_PAUSED_NEED_CELLULAR_PERMISSION:
case IDownloaderClient.STATE_PAUSED_WIFI_DISABLED_NEED_CELLULAR_PERMISSION:
showDashboard = false;
paused = true;
indeterminate = false;
showCellMessage = true;
break;
case IDownloaderClient.STATE_PAUSED_BY_REQUEST:
paused = true;
indeterminate = false;
break;
case IDownloaderClient.STATE_PAUSED_ROAMING:
case IDownloaderClient.STATE_PAUSED_SDCARD_UNAVAILABLE:
paused = true;
indeterminate = false;
break;
case IDownloaderClient.STATE_COMPLETED:
showDashboard = false;
paused = false;
indeterminate = false;
validateXAPKZipFiles();
return;
default:
paused = true;
indeterminate = true;
showDashboard = true;
}
int newDashboardVisibility = showDashboard ? View.VISIBLE : View.GONE;
if (mDashboard.getVisibility() != newDashboardVisibility) {
mDashboard.setVisibility(newDashboardVisibility);
}
int cellMessageVisibility = showCellMessage ? View.VISIBLE : View.GONE;
if (mCellMessage.getVisibility() != cellMessageVisibility) {
mCellMessage.setVisibility(cellMessageVisibility);
}
mPB.setIndeterminate(indeterminate);
setButtonPausedState(paused);
}
/**
* Sets the state of the various controls based on the progressinfo object
* sent from the downloader service.
*/
#Override
public void onDownloadProgress(DownloadProgressInfo progress) {
mAverageSpeed.setText(getString(R.string.kilobytes_per_second,
Helpers.getSpeedString(progress.mCurrentSpeed)));
mTimeRemaining.setText(getString(R.string.time_remaining,
Helpers.getTimeRemaining(progress.mTimeRemaining)));
progress.mOverallTotal = progress.mOverallTotal;
mPB.setMax((int) (progress.mOverallTotal >> 8));
mPB.setProgress((int) (progress.mOverallProgress >> 8));
mProgressPercent.setText(Long.toString(progress.mOverallProgress
* 100 /
progress.mOverallTotal) + "%");
mProgressFraction.setText(Helpers.getDownloadProgressString
(progress.mOverallProgress,
progress.mOverallTotal));
}
#Override
protected void onDestroy() {
this.mCancelValidation = true;
super.onDestroy();
}
}
this is the SampleDownloaderService class,
import com.google.android.vending.expansion.downloader.impl.DownloaderService;
/**
* Created by Abdulkarim Kanaan on 22-Mar-14.
*/
public class SampleDownloaderService extends DownloaderService {
// You must use the public key belonging to your publisher account
public static final String BASE64_PUBLIC_KEY = "<Place Key provided by Google Play Publisher>";
// You should also modify this salt
public static final byte[] SALT = new byte[] { 1, 42, -12, -1, 54, 98,
-100, -12, 43, 2, -8, -4, 9, 5, -106, -107, -33, 45, -1, 84
};
#Override
public String getPublicKey() {
return BASE64_PUBLIC_KEY;
}
#Override
public byte[] getSALT() {
return SALT;
}
#Override
public String getAlarmReceiverClassName() {
return SampleAlarmReceiver.class.getName();
}
}
Finally, this is the Main Activity creation method, where the check is carried out to see whether the expansion file exists or not.
public class MainActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
String.valueOf(ExpansionFileDownloaderActivity.expansionFilesDelivered(this)));
if (!ExpansionFileDownloaderActivity.expansionFilesDelivered(this)){
startActivity(new Intent(this, ExpansionFileDownloaderActivity.class));
}
//startApp(); // Expansion files are available, start the app
}
the problem is that after uploading the expansion file to Google Play, when the program starts, it shows that downloading process is going to be carried out. After a short period, it stops saying that "Download failed because the resources could not be found". When I place the file (obb file) in the SD Card, the application works as expected. However, I am trying now to download the file from Google Play.
What is the problem?
Thank you in advance,

I was having the same problem and no matter what I tried it still didnt work.
Finally I managed to download the apk expansion file. What I did was the following.
*Make sure your file size is correct (file size not disk size).
*Make sure versionCode matches with your manifest's versionCode.
*Make sure you have changed the SALT bytes.
Step by step:
1- Create a new app in the developer console.
2- Obtain the LVL Licence Key and repace it in your code.
3- Sign and export your application and create a zip with your expansion file without compression (compression: "store" in win rar).
4-Upload your app to google play but upload it in the Beta Testing Section. (without a production version listed, this is very important you must not have a production version saved in draft).
5- Create a google group with the people you want to allow beta acess and under the Beta Testing tab you must add that group.
5- Now its the scary part, you must click on publish. Your app will not show in google play, it will only be shown to your testing groups, TRUST ME. It should look like this:
*Note: Make sure you don't promote the beta to production or it will be shown, also notice I don't have a production version listed.
6- Under Beta Testing tab there is a link that a you must click in order to use the beta.
After that just download the app from google play, you can just type your package name for example:
https://play.google.com/store/apps/details?id=com.mydomain.myapp
and the app will be installed along with the expansion package.
If you want to test the files download, install the app and then delete the obb file downloaded. This will start the obb download process.
Hope this helps, as it did for me!
Cheers.