onMeasure() is your opportunity to tell Android how big you want your custom view to be dependent the layout constraints provided by the parent; it is also your custom view’s opportunity to learn what those layout constraints are (in case you want to behave differently in a match_parent situation than a wrap_content situation). These constraints … Read more
You can use new Property Animation Api for color animation: int colorFrom = getResources().getColor(R.color.red); int colorTo = getResources().getColor(R.color.blue); ValueAnimator colorAnimation = ValueAnimator.ofObject(new ArgbEvaluator(), colorFrom, colorTo); colorAnimation.setDuration(250); // milliseconds colorAnimation.addUpdateListener(new AnimatorUpdateListener() { @Override public void onAnimationUpdate(ValueAnimator animator) { textView.setBackgroundColor((int) animator.getAnimatedValue()); } }); colorAnimation.start(); For backward compatibility with Android 2.x use Nine Old Androids library from Jake … Read more
If you need root view of your activity (so you can add your contents there) use findViewById(android.R.id.content).getRootView() Also it was reported that on some devices you have to use getWindow().getDecorView().findViewById(android.R.id.content) instead. Please note that as Booger reported, this may be behind navigation bar (with back button etc.) on some devices (but it seems on most … Read more
To help me remember the meaning of padding, I think of a big coat with lots of thick cotton padding. I’m inside my coat, but me and my padded coat are together. We’re a unit. But to remember margin, I think of, “Hey, give me some margin!” It’s the empty space between me and you. … Read more
You can simply switch your Activity’s windowSoftInputModeflag to adjustPan in your AndroidMainfest.xml file inside your activity tag. Check the official documentation for more info. <activity … android:windowSoftInputMode=”adjustPan”> </activity> If your container is not changing size, then you likely have the height set to “match parent”. If possible, set the parent to “Wrap Content”, or a … Read more
Use the LayoutInflater to create a view based on your layout template, and then inject it into the view where you need it. LayoutInflater vi = (LayoutInflater) getApplicationContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE); View v = vi.inflate(R.layout.your_layout, null); // fill in any details dynamically here TextView textView = (TextView) v.findViewById(R.id.a_text_view); textView.setText(“your text”); // insert into main view ViewGroup insertPoint = … Read more
Let’s say you generate a bunch of views that are similar. You could set an OnClickListener for each view individually: button1.setOnClickListener(new OnClickListener … ); button2.setOnClickListener(new OnClickListener … ); … Then you have to create a unique onClick method for each view even if they do the similar things, like: public void onClick(View v) { doAction(1); … Read more
There is another solution that does not need modifying source code of ViewPager and FragmentStatePagerAdapter, and it works with the FragmentPagerAdapter base class used by the author. I’d like to start by answering the author’s question about which ID he should use; it is ID of the container, i.e. ID of the view pager itself. … Read more
this is a working example of two fingers move/scale/rotate (note: the code is quite short due to smart detector used – see MatrixGestureDetector): class ViewPort extends View { List<Layer> layers = new LinkedList<Layer>(); int[] ids = {R.drawable.layer0, R.drawable.layer1, R.drawable.layer2}; public ViewPort(Context context) { super(context); Resources res = getResources(); for (int i = 0; i < … Read more
You may follow the Wheel View library in github: Use it like this: <it.sephiroth.android.wheel.view.Wheel android:id=”@+id/wheel” xmlns:sephiroth=”http://schemas.android.com/apk/res-auto” android:layout_width=”match_parent” android:layout_height=”match_parent” sephiroth:numRotations=”6″ sephiroth:ticks=”28″ /> and it looks like this: