Develop Reference

How to display a simple ImageButton on a customly created view?

I've been browsing the entire internet, but I could not find any answer to this question. I want to create a background, some image buttons, along with a bunch of moving graphics (circles). Since I do not know how to overwrite a xml layout with moving graphics, I chose to customly create my view, draw the background, the imageButtons and the circles (2D graphics).
public class GameView extends View implements UtilConstants
since I extended the View class, I had to call the super class constructor in my constructor
GameView(Context context) {
super(context);
this.context = context;
this.paint = new Paint();
}
and to implement the onDraw method, which acts like the java paintComponent
#Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas); // necessary for some reason
setGridBackground(); // sets the background
paint.setColor(Color.parseColor("#FF0000"));
canvas.drawCircle(this.x += 10, 300, 20, paint); //moves my graphics (ball) within the screen
drawScoreInLeftUpperCorner(canvas, 20); // paints a string text on the screen
setAbilitiesImages(); // places some imageButtons
try {
Thread.sleep(THREAD_REFRESH_RATE_MS);
} catch (InterruptedException ex) {
System.out.println(ex);
}
invalidate();
}
Now, to get to my problem:
I do not know how to set those ImageButtons !!! I am trying
private void setAbilititesImages() {
ImageButton imageButton = new ImageButton(this.context); // is this ok to put the argument this.context??
imageButton.setLayoutParams(new LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT));
imageButton.setImageResource(R.drawable.monster); // set my resource
RelativeLayout relativeLayout = findViewById(R.id.in_game_layout); // what is the purpose of this???
if (relativeLayout != null) { // it never enters this if, relativeLayout is always null
relativeLayout.addView(imageButton);
}
}
Aaaaand the image button never shows up...why is it necessary to use Relative/Linear layouts? That R.id.in_game_layout I created is just an empty RelativeLayout xml. Can't I just use something like
imageButton.setImageResource(R.drawable.monster); // set my resource
imageButton.setBounds(.....);
(View)this.add(imageButton); ???

ImageButton requires a parent view to be hosted in it. The parent View can be a RelativeLayout, a linearlayout or a ConstraintLayout.
In your case, the instance relativeLayout is always null because you not specify the view parent in which you do findViewById.
You should make something like :
RelativeLayout relativeLayout = view.findViewById(R.id.in_game_layout);

You need to add layout param to your parent Relative layout also to display your Image button appropriately.
Example
RelativeLayout relativeLayout = findViewById(R.id.relativeLayout);
RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(
ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
ImageButton imageButton = new ImageButton(this);
imageButton.setImageDrawable(getResources().getDrawable(R.drawable.ic_launcher_background,null));
relativeLayout.addView(imageButton,params);

How to add an ImageView over a Button

I want to add an ImageView within the onClick() of the Button. But the ImageView should be aligned to the centre of the button.
How can I do this pragmatically?
I'm creating a new instance of the ImageView to be added on top of the View that called it and it's position is equivalent of the View that called it.
How can I get the X and Y coordinates?
EDIT:
#Override
public void onClick(final View v) {
if(v.getWidth() > v.getHeight()) size = v.getHeight();
if(v.getWidth() < v.getHeight()) size = v.getWidth();
RelativeLayout.LayoutParams button = new RelativeLayout.LayoutParams(size,size);
buttonc = new ImageView(getApplicationContext());
buttonc.setBackgroundResource(R.drawable.round);
layout.addView(buttonc,button);
I'm using the above code to attempt to pragmatically set the size of the ImageView to that of the button, and it's working.
As for the coordinates, I still haven't figured it out.
To add clarity: I'm attempting to create a rounded ripple effect over the view that calls it.

I suggest a better solution create an image view before hand place it in the xml as you see fit,at first set its visibility to false .
On click switch its visibilty to true, and the image will appear
This solution is easier than what you are searching.
Feel free to ask questions

to add Imageview
#Override
public void onClick(final View v) {
//LinearLayout
LinearLayout linearLayout= new LinearLayout(this);
linearLayout.setOrientation(LinearLayout.VERTICAL);
linearLayout.setLayoutParams(new LayoutParams(
LayoutParams.MATCH_PARENT,
LayoutParams.MATCH_PARENT));
//ImageView
ImageView imageView = new ImageView(this);
//image resource
imageView.setImageResource(R.drawable.specs);
//image position
imageView.setLayoutParams(new LayoutParams(
LayoutParams.MATCH_PARENT,
LayoutParams.WRAP_CONTENT));
//adding view to layout
linearLayout.addView(imageView);
//make visible to program
setContentView(linearLayout);
}

How to slide an ImageView from left to right smoothly in Android?

I need to make an ImageView slide from left to right of the screen with a smooth animation (I want the ImageView to be visible during the transition) I tried with the following code:
Display display = getWindowManager().getDefaultDisplay();
Point size = new Point();
display.getSize(size);
int width = size.x;
camion.animate()
.translationX(width)
.setDuration(2000)
.setInterpolator(new LinearInterpolator())
.setListener(new AnimatorListenerAdapter() {
#Override
public void onAnimationEnd(Animator animation) {
super.onAnimationEnd(animation);
//camion.setVisibility(View.GONE);
}
});
The ImageView moves but the animation is laggy and not smooth like I want to.
What am I doing wrong on the code?

Creating this kind of tween animation is simple. Just follow the steps,
Step 1
Create a directory anim inside the res directory and put this as slide.xml
<?xml version="1.0" encoding="utf-8"?>
<set
xmlns:android="http://schemas.android.com/apk/res/android"
android:interpolator="#android:anim/linear_interpolator"
android:fillAfter="true">
<translate
android:fromXDelta="0%p"
android:toXDelta="75%p"
android:duration="800" />
</set>
You can obviously customize the animation by changing the two attributes fromXDelta and toXDelta. The %p refers to with respect to the parent which simply means that it will move the image 75% with respect to the parent.
Step 2
// Refer the ImageView like this
imageView = (ImageView) findViewById(R.id.img);
// Load the animation like this
animSlide = AnimationUtils.loadAnimation(getApplicationContext(),
R.anim.slide);
// Start the animation like this
imageView.startAnimation(animSlide);
You can also setInterpolator() and setListeners() if you want to. I haven't shown them here to keep it simple. If you need, just let me know.
NOTE
As you have mentioned repeatedly, that you are experiencing a laggy animation. I have tested this animation on 3 real devices and 2 emulators and the animation was buttery smooth on all of them. Tested on low end devices like Moto E to high end devices like Nexus 5 and Galaxy S6.
If you still have a lag running this code, then the test device must be the reason. The code is perfect.
UPDATE
I just checked on my Moto G running on Lollipop too, the animation is running smoothly. This is a very small and light-weight animation, and should never be laggy. If you are still getting a lag, then it must be the device you are testing, or some other piece of code on that Activity making the UI slow or unresponsive.
Try to check which one is applicable to you,
I have tested on a total of 6 devices now with no lag at all. So, you can be rest assured that your production app will not have any lag, it can be your device which is slow
If you are doing some heavy operations like accessing the file system, database, or any other heavy operation, it must be slowing down the UI thread and you are loosing frames. Try to use AsyncTask for these heavy operations

Try this. It will animate the imageview.
ImageView img_animation = (ImageView) findViewById(R.id.img_animation);
Display display = getWindowManager().getDefaultDisplay();
float width = display.getWidth();
TranslateAnimation animation = new TranslateAnimation(0, width - 50, 0, 0); // new TranslateAnimation(xFrom,xTo, yFrom,yTo)
animation.setDuration(1000); // animation duration
animation.setRepeatCount(5); // animation repeat count
animation.setRepeatMode(2); // repeat animation (left to right, right to
// left )
// animation.setFillAfter(true);
img_animation.startAnimation(animation); // start animation

TranslateAnimation animate = new TranslateAnimation(0, -view.getWidth(), 0, 0);
animate.setDuration(500);
animate.setFillAfter(true);
view.startAnimation(animate);

Hope this works for u
animation.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".Animation" >
<ImageView
android:id="#+id/img_animation"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="30dp"
android:layout_marginTop="42dp"
android:src="#drawable/emo_im_laughing" />
</RelativeLayout>
Animation.java
import android.os.Bundle;
import android.app.Activity;
import android.view.animation.TranslateAnimation;
import android.widget.ImageView;
public class Animation extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.);
ImageView img_animation = (ImageView) findViewById(R.id.img_animation);
TranslateAnimation animation = new TranslateAnimation(0.0f, 400.0f,
0.0f, 0.0f);
animation.setDuration(5000);
animation.setRepeatCount(5);
animation.setRepeatMode(2);
animation.setFillAfter(true);
img_animation.startAnimation(animation);
}
}

try the code below
TranslateAnimation animation = new TranslateAnimation(0.0f, 0.0f, 0.0f, 1500.0f); // new TranslateAnimation (float fromXDelta,float toXDelta, float fromYDelta, float toYDelta)
animation.setDuration(2000); // animation duration
animation.setRepeatCount(1); // animation repeat count if u repeat only once set to 1 if u don't repeat set to 0
animation.setFillAfter(false);
your_view .startAnimation(animation);//your_view for mine is imageView

public class MainActivity extends Activity {
int windowwidth;
int windowheight;
private LayoutParams layoutParams;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
windowwidth = getWindowManager().getDefaultDisplay().getWidth();
windowheight = getWindowManager().getDefaultDisplay().getHeight();
final ImageView img = (ImageView) findViewById(R.id.imageView1);
img.setOnTouchListener(new View.OnTouchListener() {
#Override
public boolean onTouch(View v, MotionEvent event) {
LayoutParams layoutParams = (LayoutParams) img
.getLayoutParams();
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
break;
case MotionEvent.ACTION_MOVE:
int x_cord = (int) event.getRawX();
int y_cord = (int) event.getRawY();
if (x_cord > windowwidth) {
x_cord = windowwidth;
}
if (y_cord > windowheight) {
y_cord = windowheight;
}
layoutParams.leftMargin = x_cord - 25;
layoutParams.topMargin = y_cord - 75;
img.setLayoutParams(layoutParams);
break;
default:
break;
}
return true;
}
});
}
}

To Move imageview
from Right to Left Using #Aritra Roy Answer.
Use this code
<?xml version="1.0" encoding="utf-8"?>
<set
xmlns:android="http://schemas.android.com/apk/res/android"
android:interpolator="#android:anim/linear_interpolator"
android:fillAfter="true">
<translate
android:fromXDelta="75%p"
android:toXDelta="0%p"
android:duration="100000" />
</set>

Now we have MotionLayout try to use that for very clean and smooth sliding animation.

How can I make a drop down hidden menu

I want to make a drop down menu, like a status menu, that is hidden when the activity starts, and when it's pressed or slid it opens like the image below..
http://i.stack.imgur.com/jeq5z.png
My layout currently has a RelativeLayout for the top bar and a ScrollView for the text.. between those, i'd like to put the menu..
I'm not doing this app on phonegap or anything like that, just java and xml..
Thanks in advance
Edit:
Thank you all for your help! I end up doing a FrameLayout that was set off the screen with the translationY and then, when clicked, just slide up and down.. Here's the snipped.. I'll just leave it here in case someone else needs it.
on layout.xml
<FrameLayout
android:id="#+id/layout_FrameLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#00ffffff" >
<!-- stuf -->
</FrameLayout>
on activity.java
private FrameLayout statusDrawer = null;
private int statusDrawerHeight; // height of the FrameLayout (generated automatically)
private int statusDrawerDragButtonHeight = 30 + 5; //height of the DragButton + height of the border
private boolean statusDrawerOpened = false;
private int statusDrawerDuration = 750; //time in milliseconds
private TimeInterpolator interpolator = null; //type of animation see#developer.android.com/reference/android/animation/TimeInterpolator.html
#Override
protected void onCreated(Bundle savedInstanceState){
statusDrawer = (FrameLayout) findViewById(R.id.layout_FrameLayout);
interpolator = new AccelerateDecelerateInterpolator();
statusDrawer.post(new Runnable() {
#Override
public void run() {
statusDrawerHeight = statusDrawer.getHeight();
statusDrawer.setTranslationY(-statusDrawerHeight+statusDrawerDragButtonHeight);
}
});
statusDrawer.setOnClickListener(new OnClickListener(){
#Override
public void onClick(View v){
if(statusDrawerOpened) {
statusDrawer.animate()
.translationY(-statusDrawerHeight+statusDrawerDragButtonHeight)
.setDuration(statusDrawerDuration)
.setInterpolator(interpolator)
.start();
} else {
statusDrawer.animate()
.translationY(0)
.setDuration(statusDrawerDuration)
.setInterpolator(interpolator)
.start();
}
statusDrawerOpened = !statusDrawerOpened;
}
});
}

Use a FrameLayout as the root layout. Add the drop menu layout as in the right side of your picture. Call
menuView.setTranslationY(-view.getHeight);
on this view to initially hide the drop down menu when the activity is started. Make sure menuView only refers to the drop down view part without the small tab button. When the user touches the tab animate translationY to 0 so that the layout will slide down
ObjectAnimator.ofFloat(dropDownView, "translationY", -view.getHeight, 0).setDuration(200).start();
whereby dropDownView refers to the complete drop down menu.
Using ObjectAnimator requires API level 11. If you need to support older API levels, use http://developer.android.com/reference/android/view/animation/TranslateAnimation.html (which has some down sides).
If you instead want add a sliding effect, e.g. the sliding menu is moving with together with the finger, install a OnTouchListener:
dropDownTab.setOnTouchListener(new OnTouchListener() {
public void onTouch(View v, MotionEvent e) {
// Make the drop down menu finger follow the finger position.
// Use again dropDownView.setTranslationY(...) to move the view.
// If the drop down menu has been dragged a certain distance, make it move out by itself using the animation as above.
}
});

Android - TranslateAnimation update dynamically the size of the Layout

I'm trying to do an animation that goes like this:
The context:
I have two EditText's I need that when you click over one, the another one come out from behind the first one. Here you have some pictures to get a image of what I want.
To do this obviously I need a TranslateAnimation in order to move the second EditText from behind the first one.
My approach:
The first thing that I could thought was in use a FrameLayout put the EditText one over another, and then in the onTouch event of the first one do a TranslateAnimation on the second one. The problem with this is that if I have the FrameLayout height in wrap_content then the animation will be invisible to the user. And if I change on runtime the height of the FrameLayout I will leave a void below the first EditText as you can see in this picture:
The second solution that I thought was add one AnimationListener to the TranslateAnimation and in the onAnimationStart method change the height of the FrameLayout. But the problem with this is that the height of the FrameLayout changes too abruptly. I want keep the animation smooth.
My question:
How can I get a smooth animation of the second EditText from behind the first one, changing the height of the FrameLayout as the second EditText moves down?
Thanks!
Update:
I changed the FrameLayout by a RelativeLayout I searched and there's no difference for this case. I tried scale this RelativeLayout that contains both of the EditText with an AnimationScale in order to display the animation smoothly, but didn't work. Here is my code:
protected void expanse() {
Log.d("Accordion", "expandAccordion");
//Translate the top of the second EditText to its bottom
TranslateAnimation translateSecond = new TranslateAnimation(second.getLeft(), second.getLeft(),
second.getTop(), second.getBottom());
translateSecond.setDuration(1000);
//Scale the relative layout to show the both of them
ScaleAnimation scaleContainer = new ScaleAnimation(container.getLeft(), container.getLeft(),
container.getTop(), second.getBottom());
scaleContainer.setDuration(1000);
//At the end of the scaling, change the height of the relative layout
scaleContainer.setAnimationListener(new AnimationListenerAdapter() {
#Override
public void onAnimationEnd(Animation animation) {
RelativeLayout.LayoutParams params = (LayoutParams) container.getLayoutParams();
params.height = second.getBottom();
container.setLayoutParams(params);
super.onAnimationEnd(animation);
}
});
container.startAnimation(scaleContainer);
second.startAnimation(translateSecond);
}
BTW I can guarantee that if I hardcode some large height like 350dp, the animation is displayed correctly.
UPDATE:
I tried moving both, the second EditText and the layout below. This is the code. BTW for another reasons I changed the ListView by a custom ViewPager, this doesn't change anything.
public class MainActivity extends FragmentActivity {
private EditText first;
private EditText second;
private HoboViewPager pager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
pager = (HoboViewPager) findViewById(R.id.pager);
pager.setPageTransformer(true, new RotationPageTransformer());
pager.setAdapter(new SampleAdapter(this, getSupportFragmentManager()));
first = (EditText) findViewById(R.id.location_search_field);
second = (EditText) findViewById(R.id.term_search_field);
first.setOnTouchListener(new OnTouchListener() {
#Override
public boolean onTouch(View v, MotionEvent event) {
expanseSecondField();
return true;
}
});
}
protected void expanseSecondField() {
TranslateAnimation translateSecondField = new TranslateAnimation(second.getLeft(), second.getLeft(),
second.getTop(), second.getBottom());
translateSecondField.setFillAfter(true);
translateSecondField.setDuration(1000);
TranslateAnimation translateContainer = new TranslateAnimation(pager.getLeft(), pager.getLeft(),
pager.getTop(), pager.getTop() + second.getBottom());
translateContainer.setFillAfter(true);
translateContainer.setDuration(1000);
pager.startAnimation(translateContainer);
second.startAnimation(translateSecondField);
}
}
This didn't work because the TranslateAnimation of the container is executed immediately. The result is the same that when I was trying to change the size of the container at the end of the animation.

How use the 2nd option & try performing two translate animations in tandem: 1 on the EditText, then one on the FrameLayout? Give them both the same exact deltas and duration. This way, the FrameLayout will move down smoothly, then at the end of the animation, change the height of the FrameLayout.
Hope this helps :)