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Purpose of onSaveInstanceState() in activity lifecycle
The system has a default behavior; it save the state of views that has an ID, this feature is not guaranteed, and in some cases, you must override this method and save the state of your views. FROM DOC: "The default implementation takes care of most of the UI per-instance state for you by calling onSaveInstanceState() on each view in the hierarchy that has an id, and by saving the id of th

Categories : Android

Delay an entire repeating xml animation
@Override public void onClick(View v) { //sleep for x milliseconds Handler handler = new Handler(); handler.postDelayed(new Runnable() { public void run() { //do your stuff here } }, x); } here, anything that will happen by your onclick will occur after a pause of x milliseconds

Categories : Android

Setting onClick in getView() vs setting onListItemClick() on listview
When you are adding an OnItemClickListener on the ListView, the ListView is actually adding a simple OnClickListener to all the view added by the adapter, with easy access to the view position. You could do it yourself from the adapter but you would have to take care of view recycling by yourself. If you are doing it correctly from the adapter, there is no performance difference. Be aware that

Categories : Android

android - Change Hamburger/Back icons color programaticaly during runtime
I spent one day, played with different implementation. So my opinion, the best way todo that it copy paste DrawerArrowDrawable from AppCompat v7 library. https://gist.github.com/IstiN/5d542355935fd7f0f357 - take a look on the code with some optimization than you can use it in your main activity with code below DrawerArrowDrawable drawable = new DrawerArrowDrawable(this, this);

Categories : Android

Share android project between osx and windows
you should use git for that. create your repository on github or bibucket or your own server and easily share your work.

Categories : Android

Passing events back to a Dialog's host
If I got the Question Right, not the Communication is the Problem, but the Creation of your Button and your Text. If so, you need to Add those Dynamically to your Layout. To do so, create a container (e.G a LinearLayout) and give it an ID. In my Example Code I Assume that the ID is called buttonContainer private void addButton(String text) { Button newBtn = new Button(this); TextView new

Categories : Android

Need approach for screen development in android
You don't need Photoshop to measure the units. The Android SDK has several layouts with their accompanying properties and options that will allow you to pretty much achieve any UI implementation. imho there are not tools that will 'take a screen image and generate the android layout from it'.

Categories : Android

Handling media buttons in Android 5.0 Lollipop
To receive media button events, you need to: set a MediaSession.Callback and handle the proper events (*) set MediaSession.FLAG_HANDLES_MEDIA_BUTTONS and MediaSession.FLAG_HANDLES_TRANSPORT_CONTROLS flags set the mediaSession to active set a playbackstate properly, in special the actions (playback events) that your session handles. For example: PlaybackState state = new PlaybackState.Builder()

Categories : Android

Updating JSON values are not replacing with old values
you can use update query and every time the user check new json load your data from database into ur textview. Like : db.update( "TABLE_NAME", values, TABLE_COLUMN_NAME + " = ?", new String[] { OLD_VALUE_OF_TABLE_COLUMN_NAME }); then : retreive the data from database and load it again into your textview

Categories : Android

Android: How to add custom field/action to contact detail
I doubt it is as easy as it sounds. From what I see you need to create a new Accont on the device.. http://stackoverflow.com/a/17164257/3734557

Categories : Android

Text on webpage becomes huge when viewed through Firefox on Android
I could solve it better with a link to your css file where these font styles are being handled but without seeing that I could suggest you try em units and see if you have any more luck. An explantion + example of em being used in CSS - EM units for font size Other than that it could be a problem with font-family not being supported in the same way across all browsers or possibly some browser s

Categories : Android

Android SQLCipher doesn't work in release mode
I would recommend using the sample ProGuard file that is distributed with SQLCipher for Android. The sample can be found here.

Categories : Android

What is causing my app to crash on button press?
This Activity already has an action bar supplied by the window decor. Do not request Window.FEATURE_ACTION_BAR and set windowActionBar to false in your theme to use a Toolbar instead This is the important part here. So, check your themes.xml and set ` <item name="windowActionBar">false</item> Alternatively, you should be able to use as parent parent="Theme.AppCompat.Light.NoAct

Categories : Android

How to pre-load on boot all activities in android
Luckily you cannot really. And you are most likely addressing problem in wrong place - if your activity takes too long to start check what you are doing in onCreate(), offload some tasks to background thrads, rework your ui, use Fragments, use lazy initialization etc, etc.

Categories : Android

Error in gradle sync(Android Studio)
You need to install the "Android Support Repository" in your SDK Manager. Open your Android SDK Manager Scroll down to the "extras" folder, and check the box next to "Android Support Repository" Click "Install packages..." and accept all of the licenses that it asks you to accept.

Categories : Android

onSharedPreferenceChanged method - Called for all activities or just current activity?
It should hit areas 1 and 2 both. Shared Preferences are on a per-app basis IIRC. See the documentation for more info.

Categories : Android

Android custom animation where the animation velocity changes with time
Just simply create a translation animation and then in code set the interpolator to be an AccelerateDecelerateInterpolator. See this for more info.

Categories : Android

Unable to remove view from linear layout
You could also use this workaround: if (view != null) { //Get the real LinearLayout which is holding your View ViewGroup parent = (ViewGroup) view.getParent(); //check if it is null if (parent != null) { //remove your view parent.removeView(view); } }

Categories : Android

wait for animation to complete and then execute the code
You could try the follow, calling the delete methods after the animation has ended. YoYo.with(Techniques.ZoomOut) .withListener(new Animator.AnimatorListener() { @Override public void onAnimationStart(Animator animation) { } @Override public void onAnimationEnd(Animator animation) { tasksDatabaseOperations.deleteItemWithTask(row_id); a

Categories : Android

Change Android 5.0 scrollbar color
I found that you could override the entire scrollbarThumbVertical or scrollbarThumbHorizontal attributes within your own theme to a different drawable; within you AppTheme it would look like: <style name="AppTheme" parent="@android:style/Theme.Material"> <item name="android:scrollbarThumbVertical">@drawable/scrollbar_handle_material</item> </style> and then within yo

Categories : Android

How to write the text file using sensetalk - eggplant functional
To append information to a log file, just do this: put "this is a new log entry" & return after file "/path/to/log/file" If the file doesn't exist, it will be created. After that, a new line will be added each time. If you'll be doing this a lot you may want to create a custom handler that you can call. This one puts the date and time before each log entry: to logEvent theEvent put the

Categories : Android

Android Google Map API: How to get minimum and maximum coordinate can visible on map
I think you can use this code for determining map's bounds GoogleMap map; map.setOnCameraChangeListener(new GoogleMap.OnCameraChangeListener() { @Override public void onCameraChange(CameraPosition cameraPosition) { //those are corners of visible region VisibleRegion visibleRegion = map.getProjection().getVisibleRegion();

Categories : Android

GCM - no devices registered
I guess you should fill SERVER_URL in gcm-demo-client/src/com/google/android/gcm/demo/app/CommonUtilities.java and check whatever the HTTP call to the servlet http://Your-IP/register is really executed after the GCM registration to Google in order to let the gcm-demo-server, that you are using, to run correctly and send the push notification to that Registration ID. Don't forget to keep the ser

Categories : Android

Debug Android Wear Device over USB
You need to allow ADB debugging in Developer options on Wear device, and after you connect watch-PC by USB you will be prompted on the phone to "allow USB debugging for particular PC", you click yes and your smartwatch should be visible on adb list, also you should see log and be able to deploy apps right away - just as any phone in debugging mode.

Categories : Android

Database created but records no records inserting
KEY_COUNTRY + "TEXT," + KEY_CONTACT + "TEXT)"; You're missing spaces here between column name and type. Add the spaces. Uninstall your app so the old database with column names like countryTEXT is removed and onCreate() is executed again.

Categories : Android

Should app check if device has calling functionality when using ACTION_DIAL intent?
I would use PackageManager and resolveActivity() to see if anything will respond to your configured ACTION_DIAL Intent. That would handle: Devices that do not have native telephony and have no dialer, as resolveActivity() should return null Devices that do not have native telephony but do have a dialer (e.g., VOIP), as hopefully the authors of that dialer have ACTION_DIAL support Devices that do

Categories : Android

android login sqlite with username and password
use double ? and send two parameter in array. like: Cursor cursor = db.query(usm_Users, null, " UserName=? and Password=?", new String[] { username,password }, null, null, null);

Categories : Android

Placing LinearLayout to the bottom of other LinearLayout
I guess if you try this, it will work. Here I'm putting the two lieaner layouts inside a relative layout, so then I can manipulate where they are going to be on the screen. <?xml version="1.0" encoding="utf-8"?> <android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/drawer_layout" android

Categories : Android

How to use endpoints for Android with App Engine Search API
The combination does make sense. App Engine as a platform is so powerful exactly because you have access to so many APIs and services like search API and enhancements to your workflow like the Endpoints system, instead of simply defining an API servlet and your own protocol (or implementing jsonrpc2.0, for example) Yes, you can use an endpoint API function to run any kind of code you could run an

Categories : Android

How to create modal popup in Android?
You can use the android:theme to make an activity look like a dialog. Add a tag similar to this to your activity in the Android Manifest. <activity .... android:theme="@android:style/Theme.Holo.Light.Dialog" ..../>

Categories : Android

Setting Elevation in XML on AppCompat CardView on Android 5.0
You have to use the cardElevation attribute <android.support.v7.widget.CardView xmlns:card_view="http://schemas.android.com/apk/res-auto" card_view:cardElevation="4dp" />

Categories : Android

Android calendar view date color
Your best bet might be to create your own CalendarView class i.e. CalendarViewCustom based on the source code found here. You could then add an extra method to the LegacyCalendarViewDelegate class similar to the setFocusedMonthDateColor() method to iterate through the weeks and set a date and colour in the WeekView class (might be worth storing these key/value date/colours as an Map collection

Categories : Android

Cloudpebble "Installation failed. Check your phone for details."
The answer to my particular issue, as it turns out, was that I had unused fonts. It's not a very obvious problem, so I hope this helps others out. The main issue really was poor error reporting from cloudpebble due to the lack of error clarification returned from the pebble app to cloudpebble. I have opened an issue on the cloudpebble github (that's where I found the answer) so if any further de

Categories : Android

android is http.keepalive false necessary when using okhttp
You can change that to true with no problems. http.keepAlive just tells the client that it can keep the connection to the server open, rather than renegotiating a connection every time you do something. There shouldn't be any consequences to enabling it; at least, not in my experience.

Categories : Android

Android Search specific item in Listview
useful,but my xml file is frequently upgraded i can't use this method,i need that while typing my listview show the result(just like your example,but with action bar) this is the script: @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // Get the view from listview_main.xml setContentView(R.layout.listview_main);

Categories : Android

how to get object's attributes
Just create accessor methods for each field. Assuming you have declared your fields like this: private String title; private String desciption; create the accessor methods in your class definition like this: public String getTitle() { return title; } public String getDescription() { return description; } then you just call these methods to get the appropriate value.

Categories : Android

Android - spinner within dialog won't populate
Okay so what I did wrong was inflating/creating two independent views with the same context. First I did: View v = inflater.inflate(R.layout.diaglog_add_match, null); And then: builder.setView(inflater.inflate(R.layout.diaglog_add_match, null)) So I set the view for the builder as a new view, and not the same ones I used for the spinner. So instead if I do: View v = inflater.inflate(R.la

Categories : Android

Android layout issue with sibling of RelativeLayout
this error is because parent of TextView and LinearLayout are not same. if you want to put TextView and ProgressBar horizontal , change their parent's orientation to horizontal

Categories : Android

android : Save a value even if the app was closed
There is a librbary called GSON its good for serializing objects to json that is simple string. Than you can save it to shared preferences on application close. And ofcorse deserilize them when you need. device obj = new device (); Gson gson = new Gson(); String json = gson.toJson(obj); This is how to wrire it in preferences: PreferenceManager.getDefaultSharedPreferences(context).edit().putStr

Categories : Android




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