android-context

I have a listView, one component of the row is a TextView. By default, I wish to show only 2 rows of text in the TextView. But if the user taps on the TextView I wanted to the textView to expand in context. I actually have this portion working, but I want to have a more content indicator : My current implementation (Below) has it's own issues w/ not collapsing if the list view is scrolled, but I will handle that by storing the values for each cursor record in some collection.. I tried using chatBubble.getLineCount() but that returns zero initially b/c it has not gone through onLayout (from my

Sometimes I need to provide a Context object to call specific functions, such as Intent intent = new Intent(context, MyClass.class); in order to start a service context.startService(intent); Or, provide a Context object to do a query Cursor cursor = context.managedQuery(uri, projection, null, null, null); If this is done in a UI class which extends Activity, that's fine. However, If I want to create my own utility class (a singleton) that doesn't extend anything and call these functions, I don't have necessary Context object. Now my workaround is to pass an activity reference while

I am having trouble with my call to getWritableDatabase(). It is returning a NullPointerException. The thing that is strangest is that this error only began occurring after I commented out a couple lines of code in my android manifest. Now the project is back to where it was (I un-commented those sections and it still throws a NullPointerException). So I checked my context and tried this.getBaseContext() and this.getApplicationContext(). Using getApplicationContext() puts this out to logcat: 08-12 09:24:20.042: E/AndroidRuntime(5572): FATAL EXCEPTION: main 08-12 09:24:20.042: E/AndroidRuntime

I would like to create an recyclerView in a fragment, but it shows an error " java.lang.IllegalStateException: recylerView_Main must not be null at com.gph.bottomnavigation.FragmentMe.onCreateView(FragmentMe.kt:28)" Question 1) Please kindly help to solve this issue. Question 2) I created an recyclerView only in a empty project without any fragment, it is working properly. But the same code is no working in Fragment, it shows error so I change "recylerView_Main.layoutManager = LinearLayoutManager(this)" to "recylerView_Main.layoutManager = LinearLayoutManager(context)" It shows no error and I

Is it possible to pass arguments to an Android Handler?? I have two pieces of code. new Thread(){ public void run(){ for(;;){ uiCallback.sendEmptyMessage(0); Thread.sleep(2000); //sleep for 2 seconds } } }.start(); private Handler uiCallback = new Handler(){ public void handleMessage(Message msg){ //add a new blossom to the blossom ArrayList!! blossomArrayList.add(new Blossom(context, R.drawable.blossom)); } }; I of course get an error because the Handler method cannot see my context. This is probably because of this piece of code public BoardView(Context context){ super(context); Context is

I have a custom titlebar with an ImageButton, which produces a dialogbox, and I want to be able to show location(place itemizedOverlay) on a map(in another class) when list item is selected from dialog box, and titlebar and map are in the same context. I read somewhere that I could call a method of another class using contexts. How can I do so? public class MyTitleBar extends RelativeLayout{ private Context context; public MyTitleBar(Context context, AttributeSet attrs) { super(context, attrs); this.context = context; } @Override protected void onFinishInflate() { super.onFinishInflate();