Develop Reference

How can I make appear RecyclerView with an animation?

In my app if I press a button (the green one on the screenshot) I set my RecyclerView from height 0 to 600 and even if I re-press the same button it disappear by setting it height to 0.
But actually it's ugly to see because it's appear instantly so I would like to add an animation to it like it's growing up slowly or bouncing, I don't know, something that would make it nicer. Is there a way to make something like this?
Here is my code where I make appear or disappear the RecyclerView:
menu.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
ViewGroup.LayoutParams params = mRecyclerViewBOT.getLayoutParams();
if(params.height == 0) {
params.height = 600;
mRecyclerViewBOT.setLayoutParams(params);
}else {
params.height = 0;
mRecyclerViewBOT.setLayoutParams(params);
}
}
});

You probably want:
LayoutTransition layoutTransition = new LayoutTransition();
layoutTransition.enableTransitionType(LayoutTransition.CHANGING);
parentView.setLayoutTransition(layoutTransition);
where parentView is the view containing your recyclerView

Circular reveal animation when switching between two views

What I'm trying to achieve
I have a group of buttons in a GridLayout. One of the buttons toggles the function of the other buttons between rounding up and rounding down.
I am trying to implement an animation that changes the color of the buttons in a ripple like effect. The circular reveal animation is the effect I want where the new colour spreads from the touch point on the toggling button to the rest of the other buttons. I only want the animation to grow outward from the touch point in both cases, switching from rounding up to rounding down and back.
Problem
The animation is only working in the first instance from rounding up to rounding down (my app starts with rounding up as the default). There is no animation when switching from rounding down back to rounding up; all the buttons just changes in colour and the toggle button changes icon.
This is my first app so I am having difficulty trying to work out where I've gone wrong.
My methodology and code
In my activity_main.xml layout file, I've created two sets of GridLayouts (each with child buttons) and layered them one on top of the other by wrapping both in a FrameLayout. One set is given a different colour to the other set; I also have a different icon for the toggling button for each set to differentiate between the two rounding method. I've set the visibility attribute on the second GridLayout parent to invisible.
<FrameLayout
<GridLayout
android:id="#+id/roundUp"
<ImageButton
android:id="#+id/buttonU1"
... />
<Button ... />
<Button ... />
</GridLayout>
<GridLayout
android:id="#+id/roundDown"
android:visibility="invisible"
<ImageButton
android:id="#+id/buttonD1"
... />
<Button ... />
<Button ... />
</GridLayout>
</FrameLayout>
In my MainActivity.java file:
import ...
boolean roundingMode;
public class MainActivity extends AppCompatActivity {
GridLayout roundUp, roundDown;
ImageButton buttonU1, buttonD1;
Button ...
#Override;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
roundUp = (GridLayout) findViewById(R.id.roundUp);
buttonU1 = (ImageButton) findViewById(R.id.buttonU1);
roundDown = (GridLayout) findViewById(R.id.roundDown);
buttonD1 = (ImageButton) findViewById(R.id.buttonD1);
roundingMode = true;
buttonU1.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
buttonCircularRevealAnim(roundDown);
roundingMode = false;
}
});
buttonD1.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
buttonCircularRevealAnim(roundUp);
roundingMode = true;
}
});
}
public void buttonCircularRevealAnim(View view) {
int originX = roundUp.getWidth() / 2;
int originY = roundUp.getHeight() / 2;
float finalRadius = (float) Math.hypot(originX,originY);
Animator anim;
if (roundingMode) {
anim = ViewAnimationUtils.createCircularReveal(roundDown, originX, originY, 0, finalRadius);
roundDown.setVisibility(View.VISIBLE);
anim.start();
anim.addListener(new AnimatorListenerAdapter() {
#Override
public void onAnimationEnd(Animator animation) {
super.onAnimationEnd(animation);
roundUp.setVisibility(View.INVISIBLE);
}
});
} else {
anim = ViewAnimationUtils.createCircularReveal(roundUp, originX, originY, 0, finalRadius);
roundUp.setVisibility(View.VISIBLE);
anim.start();
anim.addListener(new AnimatorListenerAdapter() {
#Override
public void onAnimationEnd(Animator animation) {
super.onAnimationEnd(animation);
roundDown.setVisibility(View.INVISIBLE);
}
});
}
}
Ignore the fact that I currently have the origin of the animation in the center of the GridLayout. I just want to get the basics working first.
I think the problem lies in the logic and/or the set up of the animation?
I've tried moving the originX, originY and finalRadius calculations into the if statement and using the roundUp (for roundingMode true) and roundDown GridLayouts (for roundingMode false) but that didn't work - so I figure it doesn't matter if it is invisible (in the scenario where you're switching from rounding down to rounding up).

Eventually understood that the circular reveal animation works to reveal an overlapping view that is initially invisible. So in order to use it to change the colour of a view back and forth you have to apply the new colour (from the revealed view) to the view underneath after the animation has ended and then make the revealed view invisible again with the other colour applied to it.
My original code was trying to reveal the view underneath which is of course impossible.
I found the following page very helpful:
http://myhexaville.com/2016/12/19/keep-your-app-material/

How to animate videoView along with the imageView and recyclerView?

I want to use animate on videoView which is above the imageView and recyclerView. At first, videoView's visibility is Gone and when i click on the item on the recyclerView i want to make videoView Visible with the animation sliding down and also use animation to the imageView to slideUp and make it Gone. How can i do that. I have given the snapshot of before and after of the layout.
Before Animation:
After Animation:

This is what I have done for a similar situation. In your layout you need to put both views one above the other (on the exact places where they have to appear). Add the global layout listener to the videoView / imageView once in onCreate and then just change the visibility of the according view. This code could be reused with the imageView, but keep in mind that you cannot change the visibility of both views at the same time, because they will overlap. Maybe you need to wait for the first animation to go off and then show the next. It's up to you.
private static final int ANIMATION_DURATION = 350;
private void addVideoViewAnimation(final View videoView) {
videoView.setTag(videoView.getVisibility());
videoView.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
#Override
public void onGlobalLayout() {
int newVisibility = videoView.getVisibility();
if ((int) videoView.getTag() != newVisibility) {
videoView.setTag(newVisibility);
TranslateAnimation animation;
if (newVisibility == View.VISIBLE) {
animation = new TranslateAnimation(0, 0, -videoView.getHeight(), 0);
animation.setInterpolator(new DecelerateInterpolator());
} else {
animation = new TranslateAnimation(0, 0, 0, -videoView.getHeight());
animation.setInterpolator(new AccelerateInterpolator());
}
animation.setDuration(ANIMATION_DURATION);
videoView.startAnimation(animation);
}
}
});
}

Can I partially hide a layout?

As I've a master in MS Paint, I will just upload a picture selfdescripting what I'm trying to achieve.
I've searched, but I'm not really sure what do I've to search. I've found something called Animations. I managed to rotate, fade, etc an element from a View (with this great tutorial http://www.vogella.com/articles/AndroidAnimation/article.html)
But this is a bit limited for what I'm trying to achieve, and now, I'm stuck, because I don't know how is this really called in android development. Tried words like "scrollup layouts" but I didn't get any better results.
Can you give me some tips?
Thank you.
You can see a live example, with this app: https://play.google.com/store/apps/details?id=alexcrusher.just6weeks
Sincerely,
Sergi

Use something like this as your layout (Use Linear, Relative or other layout if you wish):
<LinearLayout
android:id="#+id/lty_parent">
<LinearLayout
android:id="#+id/lyt_first" />
<LinearLayout
android:id="#+id/lyt_second"/>
</LinearLayout>
And then in an onClick method on whatever you want to use to control it, set the Visibility between Visible and Gone.
public void buttonClickListener(){
((Button) findViewById(R.id.your_button))
.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
if (lyt_second.getVisibility() == View.GONE) {
lyt_second.setVisibility(View.VISIBILE);
}
else {
lyt_second.setVisibility(View.GONE);
}
});
Which is fine if you just want a simple appear/disappear with nothing fancy. Things get a little bit more complicated if you want to animate it, as you need to play around with negative margins in order to make it appear to grow and shrink, like so:
We use the same onClick method that we did before, but this time when we click it starts up a custom SlideAnimation for the hidden/visible view.
#Override
public void onClick(View v) {
SlideAnimation slideAnim = new SlideAnimation(lyt_second, time);
lyt_second.startAnimation(slideAnim);
}
The implementation of the SlideAnimation is based on a general Animation class, which we extend and then Override the transformation.
public SlideAnimation(View view, int duration) {
//Set the duration of the animation to the int we passed in
setDuration(duration);
//Set the view to be animated to the view we passed in
viewToBeAnimated = view;
//Get the Margin Parameters for the view so we can edit them
viewMarginParams = (MarginLayoutParams) view.getLayoutParams();
//If the view is VISIBLE, hide it after. If it's GONE, show it before we start.
hideAfter = (view.getVisibility() == View.VISIBLE);
//First off, start the margin at the bottom margin we've already set.
//You need your layout to have a negative margin for this to work correctly.
marginStart = viewMarginParams.bottomMargin;
//Decide if we're expanding or collapsing
if (marginStart == 0){
marginEnd = 0 - view.getHeight();
}
else {
marginEnd = 0;
}
//Make sure the view is visible for our animation
view.setVisibility(View.VISIBLE);
}
#Override
protected void applyTransformation(float interpolatedTime, Transformation t) {
super.applyTransformation(interpolatedTime, t);
if (interpolatedTime < 1.0f) {
// Setting the new bottom margin to the start of the margin
// plus the inbetween bits
viewMarginParams.bottomMargin = marginStart
+ (int) ((marginEnd - marginStart) * interpolatedTime);
// Request the layout as it happens so we can see it redrawing
viewToBeAnimated.requestLayout();
// Make sure we have finished before we mess about with the rest of it
} else if (!alreadyFinished) {
viewMarginParams.bottomMargin = marginEnd;
viewToBeAnimated.requestLayout();
if (hideAfter) {
viewToBeAnimated.setVisibility(View.GONE);
}
alreadyFinished = true;
}
hideAfter = false;
}
}
EDIT: If anyone had used this code before and found that if you click on the button that starts the animation more than once before the animation was finished, it would mess up the animation from then on, causing it to always hide the view after the animation finished. I missed the reset of the hideAfter boolean near the bottom of the code, added it now.

you can do this manually by using setvisibility feature on the event onClick()
or
use this
dynamically adding two views one below other

Button not responding to Click Event after Translation animation

I have performed a Translation animation on button ,everything work as i excepted ,but only the problem is after the animation the button not responding to click event please correct me
Button b=(Button)findViewById(R.id.button1);
TranslateAnimation slide=new TranslateAnimation(0, 30, 0,-40);
slide.setDuration(500);
slide.setZAdjustment(TranslateAnimation.ZORDER_TOP);
slide.setFillAfter(true);
b.startAnimation(slide);

This will translate the object in y direction:
ObjectAnimator mover = ObjectAnimator.ofFloat(v, "translationY", 0, 400);
mover.start();

If you are handling animations at lower level API (below HoneyComb) your animation actually does not moves the button but only its images.Its click will be at same place where you have placed it in your layout.

I faced this issue and I did fix it just some second ago. So, I think that I should share my solution with you guys.
In animation xml file,I removed android:fillAfter="true" when keep android:fillEnabled="true".
Register Animation listener, then in onAnimationEnd() method, I call View#Layout() to change the position of the view.
int newLeft = (int) (layoutContent.getLeft() + layoutContent.getWidth() * 0.8);
layoutContent.layout(newLeft,
layoutContent.getTop(),
newLeft + layoutContent.getMeasuredWidth(),
layoutContent.getTop() + layoutContent.getMeasuredHeight());
In my case, what the animation do is that slides the layoutContent to leftside 80% of width.
It works fine. Hope this helps.
#Update: Today, you can use ObjectAnimator on android 3.0 +. If you are developing for android under 3.0, you can find it at support library v.4. ObjectAnimator is bester for animation.
#Update#2: You can use ViewPropertyAnimator on android api higher 12 version.
It provides better performance, and fix problem with click events. Example:
mButton.animate()
.setDuration(TIME)
.translationY(VALUE)
.start();

I could achieve what you wanted but you will have manage co-ordinates manually.
See if it works for you.
public class AnimationTestActivity extends Activity {
private Button mButton;
private LinearLayout.LayoutParams params;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mButton = (Button) findViewById(R.id.button);
mButton.setOnClickListener(mClickListener);
params = (LayoutParams) mButton.getLayoutParams();
}
private android.view.View.OnClickListener mClickListener = new View.OnClickListener() {
#Override
public void onClick(View v) {
TranslateAnimation animation = new TranslateAnimation(0, 0, 0, 400);
animation.setDuration(2000);
animation.setAnimationListener(mAnimationListener);
v.startAnimation(animation);
}
};
private AnimationListener mAnimationListener = new AnimationListener() {
#Override
public void onAnimationStart(Animation animation) {
}
#Override
public void onAnimationRepeat(Animation animation) {
}
#Override
public void onAnimationEnd(Animation animation) {
params.topMargin = params.topMargin + 400;
mButton.setLayoutParams(params);
}
};
}

The animation do not change the View actually Position. even if you setfillAfter(true), The position it can accept click event is the original position.

I found an easy solution define the button final position in layout and start the animation from some position ,ie specify the fromX or fromY instead of putting as zero

Try to use this:
b.layout(0, -40, b.getWidth(), b.getHeight());