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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




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