I'm querying the calendar data like this:
// Constructor of the class
mCursor = context.getContentResolver().query(CalendarContract.Events.CONTENT_URI, mColumns, null, null, null);
updateEvents();
//contents of updateEvents:
events.clear();
mCursor.moveToFirst();
mLastUpdate = System.currentTimeMillis();
while (!mCursor.isAfterLast())
{
long end = mCursor.getLong(2);
if (end > mLastUpdate)
events.add(new Event(mCursor));
mCursor.moveToNext();
}
The code manages works on mobile device, however when it's run on a Wear device there appears to be no data.
I've found a WaerableCalendarContract, but it doesn't seem to contain the Events class that I use to fill the mColumns class to select the desired data.
How can I do the same on the Wear?
WearableCalendarContract describes a 24 hour long window (starting from the current time) of calendar data. You don't see Event there, because we transfer Instances objects. As you can see in base interface for Instances, it does include Events columns too, so you should be able to fetch the data that you need from there.
If you need more than 24 hours of data, you will need sync it yourself. Query the calendar on the phone and then for each event that interests you, construct a DataItem. This is a little tricky, so I would recommend using the WearableCalendarContract instead.
I think you have to sync your data to the Wear app manually, a.k.a fetch it from the ContentProvider on the phone and then send it to the wearable via the DataItem API. Read more about syncing data between phone<->wear HERE.
Related
I'm developing an android app and part of it needs to read WhatsApp messages by the notifications and analyze them.
I'm using a NotificationListenerService and it is working, however, I'm having a problem that notifications are being "analyzed" twice when I get the notification and then get a Message from other chat.
What I want is to analyze each message (Notification) once.
I already tried to save the notification sortKey or the StatusBarNotification key in a HashSet and then check, if it already contains the key every time, however that does not work.
Here is the code that in onNotificationPosted function -
String pack = sbn.getPackageName();
if (pack.equals("com.whatsapp")) {
Bundle extras = sbn.getNotification().extras;
if (extras.getCharSequence("android.text") != null && extras.getString("android.title") != null) {
if (sbn.getNotification().getSortKey() != null) {
String title = extras.getString("android.title");
String text = extras.getCharSequence("android.text").toString();
//Checking if it's from specic group and analyzing the message and
//doing what needs to be done, not related to the problem.
}
}
}
The result I want is that every notification will be analyzed once and not get posted again if some other messages arrive in other chats
Without knowing the inner workings of WhatsApp, it's hard to tell what you should exactly do, because it appears they reuse Actions/Extras for various things (which makes sense anyway).
In this case though, you could keep a list/map of the ones you've already "analyzed" and if you get it again, discard it.
I'm making a to-do list app and after user presses the button I create a new GridLayout(and all the data about time and name of the task inside of it) and add it into my RelativeLayout. How do I save those GridLayouts in UI so after the activity is destroyed and launched again those layouts are there.
After pressing the button I trigger the Create Activity method
public void CreateActivity(String name,int hours, int minutes,int i)
{
RelativeLayout.LayoutParams relparams= new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT,RelativeLayout.LayoutParams.WRAP_CONTENT);
relparams.addRule(RelativeLayout.BELOW,i);
relparams.setMargins(0,50,0,100);
Glayouts.add(new GridLayout(this));
Glayouts.get(i+1).setBackgroundColor(Color.GRAY);
Glayouts.get(i+1).setMinimumWidth(relative.getWidth());
Glayouts.get(i+1).setId(i+1);
Glayouts.get(i+1).setPadding(10,0,0,0);
GridLayout.LayoutParams namee = new GridLayout.LayoutParams();
namee.columnSpec = GridLayout.spec(0);
namee.rowSpec = GridLayout.spec(0);
namee.setGravity(Gravity.LEFT);
final TextView Actname = new TextView(this);
Actname.setText(name);
GridLayout.LayoutParams checkbox = new GridLayout.LayoutParams();
checkbox.columnSpec = GridLayout.spec(1);
checkbox.rowSpec = GridLayout.spec(0);
checkbox.setGravity(Gravity.RIGHT);
CheckBox check = new CheckBox(this);
// ADDING TO LAYOUT
Glayouts.get(i+1).addView(Actname,namee);
Glayouts.get(i+1).addView(check,checkbox);
relative.addView(Glayouts.get(i+1),relparams);
Theoretically when you extends View, then you can also override onSaveInstanceState and onRestoreInstanceState methods, where you must provide your own SavedState class that typically extends BaseSavedState. You can find info on that here
In your case, your layout is dynamic, therefore this doesn't really work. To tell you the truth, your layout probably shouldn't be constructed this way, you should be rendering the grid using a RecyclerView based on a "model" that describes this layout, render the items of the grid via the RecyclerView.Adapter, and you should persist either the "model", or the data you use to construct this model along with the user-inputted state so that you can re-construct the model that will be rendered via your RecyclerView.
You can read more about RecyclerView here.
You can read more about data persistence here.
You can read about using onSaveInstanceState to save data in Activities/Fragments across config change and process death (but not finishing then restarting the app) here.
You can’t. The best way to save state is to use some persistence mechanism, for example database (I’d recommend Room as it is officially supported by Google).
After clicking a button, you should put all the needed information (name, hours, minutes) in the database and when Activity is created, you can read all persisted data and - basing on it - create all needed layouts again.
Another option is storing data in SharedPreferences - it is much easier to setup, so you can also start with this solution. Please note, I'm suggesting it as a first step in the world of persistency in Android, not as a preferred solution for storing data.
Hey I am trying to send MIDI data from a Java class to a MIDI device connected via USB. I did this once like 2 years ago and it worked, but I somehow can't find the project anymore.
The example Java code runs fine;
myMsg = new ShortMessage();
myMsg.setMessage(ShortMessage.NOTE_ON, 0, 60, 93);
timeStamp = -1;
Receiver rcvr = MidiSystem.getReceiver();
rcvr.send(myMsg, timeStamp);
Simple stuff. 5 lines of code and the message appears on the device. The problem is, that this way, only the standard device is set up and ready to receive MIDI. I can't ask my users to set the device of desire as standard device every time they want to use my application. (the Receiver acts as output destination/port to the input of the physical device I am connected to)
I am now trying to set up the Receiver by doing the following:
MidiDevice.Info[] infoA=MidiSystem.getMidiDeviceInfo();//array where all the device info goes
for (int x=0;x<infoA.length;x++){
System.out.println("in "+infoA[x]); //this displays all the devices
}
MidiSystem.getMidiDevice(infoA[d]); //d is set to an integer that represents the item number on the device list of the device I wanna send MIDI to
System.out.println(infoA[d]);//last check if the correct device is selected
MidiDevice MidiOutDevice = MidiSystem.getMidiDevice(infoA[d]); //setting this to "my" device in order to set the Receiver
maschineReceiver= MidiOutDevice.getReceiver();
Sequencer MidiOutSequencer = MidiSystem.getSequencer();
MidiOutSequencer.getTransmitter().setReceiver(maschineReceiver); //probably unnecessary last 2 line but I gave this a try in case it helps
if I now do maschineReceiver.send(myMsg, timeStamp);, nothing happens at all. I also tried different devices but it didn't get any better. I am sure it can't be a very hard difficult thing to do as it something I actually achieved 2 years ago when my coding skills were awful but I just can't find the mistake right now, no matter how often I reread the Java documentation, it just won't work whatever I do.
Thanks in advance
To actually reserve a device for your program, you need to use the MidiDevice method open:
if (!(device.isOpen())) {
try {
device.open();
} catch (MidiUnavailableException e) {
// Handle or throw exception...
}
}
I am wondering what the best method is to check if it is the first time a certain user has used my app, and also when they update will it reset and make it think they are a new user.
Edit(For more precision): I want to store a user id number in my sql server, and I want every user to create a password when they first download, but I also want them to have the option to select "Already have account" so that they can sync their accounts across devices
Like Illegal Argument mentions, the most reliable way is to use a server, because if you use a Shared preference, the user can delete the data or move to a different device and appear to be a totally new user.
If you don't want to go through the trouble of creating and managing your own server, you might consider using Google's Cloud Save API. When your app starts, check for existing data in the cloud. If there's nothing there it's a new user so create the data. It should be as simple as that.
The most reliable way to know that the user is a first time user is via a server validation. Another way to do it would be to use shared preference and saving certain data in internal or external storage. However storing data in mobile is not so foolproof as data can be easily deleted by user.
Globals
String _StrCode="";
SharedPreferences preferences;
String _responseCode=null;
In oncreate but before set content view check
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.requestWindowFeature(Window.FEATURE_NO_TITLE);
preferences = getSharedPreferences("mypref", 0);
_StrCode= preferences.getString("Code", _StrCode);
if(_StrCode.equalsIgnoreCase("")){
setContentView(R.layout.activity_qdc_status__launcher);
// here you can assign a value to
_StrCode ="some value";
Editor prefsEditor = preferences .edit();
prefsEditor.putString("Code",_StrCode);
prefsEditor.commit();
}else{
Intent _in= new Intent(firstscreen,secondscreen.class);
startActivity(_in);
finish();
}
}
i hope this will halp you and its easy to understand too.
Android platform is really fun to work with especially when it comes to resolving issues. Indeed, there is possibly everything there is to know about Android development on the internet.
Alright, I've been searching for about a week and haven't found anything that was close from working. Let's dive into it.
We are building an Android Application that requires a read/write access to existing Contacts on a device. It has become really easy to read a contact's set photo using this method :
// Returns a stream reading a contact thumbnail
public InputStream getContactThumbnail(int id) {
// Stream reading contact image
InputStream stream = ContactsContract.Contacts.openContactPhotoInputStream(
context.getContentResolver(),
ContentUris.withAppendedId(
ContactsContract.Contacts.CONTENT_URI, id
)
);
// If image is null, try to read Facebook image
if (stream == null) {
stream = new ByteArrayInputStream(getFacebookPhoto(id));
}
return stream;
}
Now, the previous method receives an id as a parameter and returns a Stream making it possible to read the contact's thumbnail. It is needed to be a stream because the phone acts like a web server and has multiple threads running. If a thumbnail is requested several times in the same short time lapse, an OutOfMemoryException will be thrown for sure.
I need to correctly implement the getFacebookPhoto(int) method so that it returns whatever stream reading the Facebook profile picture of a contact that has his or her contact linked with his or her respective Facebook profile. I've tried and failed so many times.
Hypothesis #1
If a contact is linked with a Facebook profile, it has to have the Facebook ID saved somewhere. If this information is accessible, it would make it easy to get a Facebook profile picture using graph. Problem is an internet connection is needed to do so.
Hypothesis #2
Facebook thumbnails are saved somewhere on the SD card. Maybe there's a link between a Contact and those files that can be found through an SQLite request?
Hypothesis #3
sigh, I look desperate. Okay, if I understood correctly, a phone Contact and a Facebook Contact are not the same things in the database. If you query all the contacts from the following URI :
*ContactsContract.Contacts.CONTENT_URI*
you only get contacts that you created and nothing regarding Facebook links. Is there a way to find all linked contacts and get their respective photos?
Conclusion
Yeah, that's about is. To sum it up, I need to read all contacts information. For each contact, I have to find its photo. If the user has not set a picture to a contact that is linked to a Facebook profile, the profile picture which it was linked too must be read.
Up until now, the StackOverflow community has been of a great help and saved my life and job countless times. It is possible, I've seen it in other apps.
Thank you for spending of your time, it is truly appreciated.
EDIT
Let's not give up! I will start a 100pts bounty as soon as I can.
Your hypothesises are right to a certain extend. In contact application this things are handled as folows -
Device's Contact & its Facebook account are mapped by Contact's _ID & Facebook's id, this is one-to-one mapping. So from this mapping first you have to find out the Facebook id
of the conserned contact. But in which table this info is stored & wheather that table is eposed to you or not, URL to that table completely dependent on vendors.
From Facebook Id we can get corresponding profile image either from Facebook's server or from Media DB, if it is also cached in.
But this is not supported by all OEMs. And implementation varies from OEM to OEM as Google don't enforce for any common standard implementation of it.
So there is no garantee that a single implementation will work for all devices from different OEMs.
You should really go and play around with Graph Explorer on the Facebook Developers site it will help you a lot in figuring out what you need to do to get certain things. In order to get the picture for an person you just have to do is do a simple GET HTTPRequest with the graph path of /ID?fields=picture (where ID is the facebook id of the contact) which will return a JSON object that contains the link to that person's profile picture. From there it should be fairly simple for you to get the image.
You can also do the same thing to get all of a person's friends with the picture information by sending a GET request to /me/friends?fields=picture. It seems like you are trying to avoid a web connection but if the android contacts do not store the facebook id then you will have to get the ids yourself I'm afraid.
Hope that helps.
Why don't you use FQL, for Android you can use -
String query = "SELECT uid, name, pic, pic_small, pic_big FROM user WHERE uid IN (SELECT uid2 FROM friend WHERE uid1 = me())";
Bundle params = new Bundle();
params.putString("method", "fql.query");
params.putString("query", query);
mAsyncFacebookRunner.request(null, params, new CustomRequestListener());
where CustomRequestListener() extends RequestListener in the Facebook Android SDK.