Develop Reference

Offline sideloading with Mapbox

So I'm trying to use the Mapbox SDK in an offline mode by merging tiles in a local DB file I created from my own tile server by using
./mbgl-offline --north [north coordinate] --west [west coordinate] --south [south coordinate] --east [east coordinate] --minZoom [minimum zoom] --maxZoom [maximum zoom] --output [output file path] --style [style URL] --token [mapbox token]
command from the mapbox-gl-native library.
I put the file in the /path/to/file/files directory and I implemented the merging code as shown in the example : merge offline tiles example
When I open the app I get a toast says the merging went successfully but I can't see the map. all I see is a blank surface with the background color of my map style.
As shown in the example, I make sure the app is not connected to the internet and then I merge the DB file before I load the style:
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Mapbox access token is configured here. This needs to be called either in your application
// object or in the same activity which contains the map view.
Mapbox.getInstance(this, getString(R.string.access_token));
// This contains the MapView in XML and needs to be called after the access token is configured.
setContentView(R.layout.activity_main);
mapView = findViewById(R.id.mapView);
mapView.onCreate(savedInstanceState);
Mapbox.setConnected(false);
mergeDb();
mapView.getMapAsync(this);
}
#Override
public void onMapReady(#NonNull final MapboxMap mapboxMap) {
MainActivity.this.mapboxMap = mapboxMap;
mapboxMap.setStyle( new Style.Builder().fromUrl("http://<my_server_ip>/styles/klokantech-basic/style.json")
, new Style.OnStyleLoaded() {
#Override
public void onStyleLoaded(#NonNull Style style) {
// enableLocationComponent(style);
}
});
}
My mergeDb function:
private void mergeDb(){
System.out.println(FileSource.getResourcesCachePath(this));
OfflineManager.getInstance(this).mergeOfflineRegions(FileSource.getResourcesCachePath(this) + "/myfile.db", new OfflineManager.MergeOfflineRegionsCallback() {
#Override
public void onMerge(OfflineRegion[] offlineRegions) {
mapView.getMapAsync(new OnMapReadyCallback() {
#Override
public void onMapReady(#NonNull MapboxMap mapboxMap) {
mapboxMap.setStyle(new Style.Builder().fromUrl("http://<my_server_ip>/styles/klokantech-basic/style.json"));
}
});
Toast.makeText(
MainActivity.this,
String.format("Merged %d regions.", offlineRegions.length),
Toast.LENGTH_LONG).show();
}
#Override
public void onError(String error) {
Toast.makeText(
MainActivity.this,
String.format("Offline DB merge error." ),
Toast.LENGTH_LONG).show();
System.out.println(error);
}
});
}
Any idea what could be the problem?

pusher-java-client eventQueue inside onCreate

Hi im using pusher for notifications, after some test i keep having troubles, now i have this message when i intent to load a task.
02-08 13:43:56.751 20712-21208/package E/AndroidRuntime: FATAL EXCEPTION: pusher-java-client eventQueue
java.lang.NoClassDefFoundError: com.pusher.client.connection.websocket.WebSocketClientWrapper
at com.pusher.client.util.Factory.newWebSocketClientWrapper(Factory.java:67)
at com.pusher.client.connection.websocket.WebSocketConnection$1.run(WebSocketConnection.java:63)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
at java.lang.Thread.run(Thread.java:841)
this is how i call pusher connection in onCreate
runOnUiThread(new Runnable() {
#Override
public void run() {
// Create a new Pusher instance
Pusher pusher = new Pusher("KEY");
pusher.connect(new ConnectionEventListener() {
#Override
public void onConnectionStateChange(ConnectionStateChange change) {
System.out.println("State changed to " + change.getCurrentState() +
" from " + change.getPreviousState());
}
#Override
public void onError(String message, String code, Exception e) {
System.out.println("There was a problem connecting!");
}
}, ConnectionState.ALL);
Channel channel = pusher.subscribe("my-channel");
channel.bind("my-event", new SubscriptionEventListener() {
#Override
public void onEvent(String channel, String event, String data) {
System.out.println("Received event with data: " + data);
}
});
pusher.disconnect();
pusher.connect();
logger.info("Hubo un problema al conectarse");
}
});
Im stuck here, i don´t know if im implementing in a bad way the Thread, some tips will be helpful, thanks!

The reason behind this error is the 64K limit in android VM.
To fix it U should download this jar:
http://central.maven.org/maven2/com/pusher/pusher-java-client/1.2.1/pusher-java-client-1.2.1-jar-with-dependencies.jar
Add it and remove any existing java-client-* from your project dependency.
Also remove any com.google.gson from your gradle.build file.
Finally, enable multidex in your project:
https://developer.android.com/studio/build/multidex.html
that worked for me.

How to generate referral code using Branch.io Metrics?

I am trying to implement a referral code system, and I am using Branch.io Metrics library. The problem I am facing is that the documentation is not good (doesn't work) and I am unable to generate a code
Documentation:
https://github.com/BranchMetrics/Branch-Android-SDK#register-an-activity-for-direct-deep-linking-optional-but-recommended
Here are the steps I have taken including adding the library.
1) Grabbed the jar, added to my libs folder and added the following to my depenencies
compile files('libs/branch-1.5.9.jar')
2) In my application class that extends Application I added the following
if (DEBUG) {
Branch.getAutoTestInstance(this);
} else {
Branch.getAutoInstance(this);
}
3) In my AndroidManifest.xml I added the following
<meta-data android:name="io.branch.sdk.BranchKey" android:value="#string/bnc_app_key" />
4) In the Activity that I am testing everything, I added in the onStart() method the following
#Override
protected void onStart() {
// note that branch is a global variable (Branch branch;)
if (DEBUG) {
branch = Branch.getTestInstance(this.getApplicationContext());
} else {
branch = Branch.getInstance(this.getApplicationContext());
}
branch.initSession(new BranchReferralInitListener() {
#Override
public void onInitFinished(JSONObject jsonObject, BranchError branchError) {
if (branchError == null) {}
}, this.getIntent().getData(), this;
}
From the above, I believe I have successfully created a branch.io session and a listener that will allow me to retrieve data if branchError is null (there are no conflicts)
While still inside onStart() I now try to generate a referral code. So the whole onStart() looks as follows:
#Override
protected void onStart() {
// note that branch is a global variable (Branch branch;)
if (DEBUG) {
branch = Branch.getTestInstance(this.getApplicationContext());
} else {
branch = Branch.getInstance(this.getApplicationContext());
}
branch.initSession(new BranchReferralInitListener() {
#Override
public void onInitFinished(JSONObject jsonObject, BranchError branchError) {
if (branchError == null) {}
}, this.getIntent().getData(), this;
}
branch.getReferralCode(5, new BranchReferralInitListener() {
#Override
public void onInitFinished(JSONObject jsonObject, BranchError branchError) {
try {
String code = jsonObject.getString("referral_code");
Log.d(TAG, "code: " + code);
} catch (JSONException e) {
Log.e(TAG, "JSONException :: " + e);
e.printStackTrace();
}
}
});
}
5) I added onNewIntent override method
#Override
protected void onNewIntent(Intent intent) {
this.setIntent(intent);
}
My app does not reach inside of the onInitFinished listener, so I am unable to retrieve any code(s). Any suggestions on what I have missed is appreciated, and hopefully this thread will fill the holes that the documentation lacks.

I'm going to assume that the following lines of code are properly closed and aren't throwing syntax errors:
branch.initSession(new BranchReferralInitListener() {
#Override
public void onInitFinished(JSONObject jsonObject, BranchError branchError) {
if (branchError == null) {}
}, this.getIntent().getData(), this); // parenthesis wasnt here
First, if you are extending the Application class, you need to initialize branch inside the onCreate() callback of your Application class:
public void onCreate() {
super.onCreate();
Branch.getInstance(this);
}
As per the Branch sample code found here, you actually need to call:
Branch.getInstance();
Instead of:
Branch.getInstance(getApplicationContext());
Inside your activities onCreate callback. Once that is taken care of, the Branch SDK will properly create.

There are multiple apps registered for the AuthActivity URI scheme - Dropbox sync issue on Android

Sorry for my poor English and the fact I am a newbie on Android development.
I'm developping an Android app which should send data to the datastore of Dropbox. My problem is, when my code is getting this line:
mAccountManager.startLink(DropboxHelper.this,REQUEST_LINK_TO_DBX);
Then my logcat send me the message below:
10-19 10:40:32.411: W/com.dropbox.client2.android.AuthActivity(28381): There are multiple
apps registered for the AuthActivity URI scheme (db-qeojdcjk0dkkswc). Another app may be
trying to impersonate this app, so authentication will be disabled.
The closer explanation I have found is this one:
Android + DropboxSync startLink
But the comments have not helped me.
Here my code :
public class DropboxHelper extends ActionBarActivity {
// *** Objects and APP_KEY + APP_SECRET are instantiate here ***
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.dropbox_activity);
// Set up the account manager
mAccountManager = DbxAccountManager.getInstance(getApplicationContext(), APP_KEY, APP_SECRET);
mUnlinkButton = (Button) findViewById(R.id.unlink_button);
mUnlinkButton.setVisibility(View.GONE);
// Button to link to Dropbox
mLinkButton = (Button) findViewById(R.id.link_button);
mLinkButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
if ( mAccountManager.getLinkedAccount() == null )
mAccountManager.startLink(DropboxHelper.this, REQUEST_LINK_TO_DBX);
else
{
Toast.makeText(DropboxHelper.this, "Connection déjà établie, vous pouvez vous déconnecter si vous le souhaitez", Toast.LENGTH_LONG).show();
mUnlinkButton.setVisibility(View.VISIBLE);
}
}
});
mUnlinkButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
mAccountManager.unlink();
Toast.makeText(DropboxHelper.this, "Déconnecté", Toast.LENGTH_LONG).show();
}
});
// Set up the datastore manager
if (mAccountManager.hasLinkedAccount()) {
try {
// Use Dropbox datastores
mDatastoreManager = DbxDatastoreManager.forAccount(mAccountManager.getLinkedAccount());
mLinkButton.setVisibility(View.GONE);
} catch (DbxException.Unauthorized e) {
System.out.println("Account was unlinked remotely");
}
}
if (mDatastoreManager == null) {
// Account isn't linked yet, use local datastores
mDatastoreManager = DbxDatastoreManager.localManager(mAccountManager);
// Show link button
mLinkButton.setVisibility(View.VISIBLE);
}
}
#Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == REQUEST_LINK_TO_DBX) {
if (resultCode == Activity.RESULT_OK) {
account = mAccountManager.getLinkedAccount();
try {
// Migrate any local datastores to the linked account
mDatastoreManager.migrateToAccount(account);
// Now use Dropbox datastores
mDatastoreManager = DbxDatastoreManager.forAccount(account);
// Hide link button
mLinkButton.setVisibility(View.GONE);
} catch (DbxException e) {
e.printStackTrace();
}
} else {
// Link failed or was cancelled by the user
}
} else {
super.onActivityResult(requestCode, resultCode, data);
}
}
}
I can't figure out How to solve this issue, I really thank you If you can help me.
Best regards.

This generally means you have more than one app installed using the same app key. Often, this can happen if you have, for example, a sample app from the SDK as well as the app you're developing installed on the same device (or virtual device) using your app key. The solution is just to uninstall one of the apps, or use a different app key in one of them.

LibGDX inside Android Activity

I'm in the middle of developing a small app for Android using the Android UI and activities for the most part of the interaction, however one key aspect requires the use of LibGDX (using 3D models and physics). I want to be able to click a button in my app (my "Activate" class) which will open the "AndroidApplication" class (my "Bobble" class) that initializes and runs all the LibGDX code.
My problem is that I can't use an "Intent" to start an AndroidApplication class (only an Activity as far as I can tell). I'm sure that people have had to work around this issue in the past so any help would be fantastic.
Here's my code so far:
public class Activate extends Activity {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
try
{
setContentView(R.layout.activate_screen);
Button b_Run = (Button) findViewById(id.bActiveRun);
b_Run.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent to_Bobble = new Intent(v.getContext(), Bobble.class);
startActivity(to_Bobble);
}
});
}
catch (Exception e)
{
Log.e("Activate", "Error in activity", e);
Toast.makeText(getApplicationContext(),
e.getClass().getName() + " " + e.getMessage(),
Toast.LENGTH_LONG).show();
}
}
}
public class Bobble extends AndroidApplication {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
LifeCycle loop = new LifeCycle();
loop.ddgSettings = new ddgSystemSettings(this);
initialize(loop, false);
}
}

Ok I can now confirm that there is no issue at all with the above code. The issue was that I hadn't declared my "Bobble" class/file in the AndroidManifest file, and that was causing the runtime error.