i try to rotate imageview with animation.i wrote some code.this is a my xml animation code
<rotate
xmlns:android="http://schemas.android.com/apk/res/android"
android:fromDegrees="0"
android:toDegrees="360"
android:pivotX="50%"
android:pivotY="50%"
android:repeatCount="infinite" />
and this is a java code
final ImageView myImage = (ImageView)findViewById(R.id.rot);
final Animation myRotation = AnimationUtils.loadAnimation(getApplicationContext(), R.anim.rotator);
myImage.setAnimation(myRotation);
Handler ha=new Handler();
ha.postDelayed(new Runnable() {
#Override
public void run() {
myRotation.setDuration(1000);
}
}, 1000);
myRotation.cancel();
i try cancel animation when Duration is over.but i can rotate imageview but i can't cancel aniamtion
how i can solve my problem ? if anyone knows solution please help me
You don't need to use handler for animation.
Just use this:
animation xml:
<rotate
xmlns:android="http://schemas.android.com/apk/res/android"
android:fromDegrees="0"
android:toDegrees="360"
android:pivotX="50%"
android:pivotY="50%"
android:repeatCount="1"
android:duration="1000"/>
In activity:
myImage.startAnimation(myRotation); //this will stop animation after 1000 miliseconds as `repeatCount` is 1.
Hope it helps.
Try these:
myImage.startAnimation(myRotation); // to start animation
myImage.cancelAnimation(); // to cancel animation
Related
Here's my animation xml code
<rotate
android:pivotX="50%"
android:pivotY="50%"
android:fromDegrees="0"
android:toDegrees="360"
android:duration="2500"
android:startOffset="0"
android:repeatCount="1"
/>
Here's my kotlin code
private fun animateSidebarOpener() {
val rotate = AnimationUtils.loadAnimation(this, R.anim.sidebar_button_animation)
binding?.btnOpenSidebar?.animation = rotate
}
Thing is that for the animation to work, I need to start another activity and close it for the animation to work, how to make it work as soon as I call the animateSideBarOpener function
I'm new to android studio and I want to animate an imageButton with a sequential animation set. The animation set (animation_boutons.xml)is in res/anim.
I've tried with animationSet in java but the app crashed every time I launched the emulator.
I've spent a long time looking for a solution. I hope someone can help me !
I apologize if it's something obvious.
java code:
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
configureCodeurBouton();
}
private void configureCodeurBouton() {
ImageButton boutonCodeur = findViewById(R.id.boutoncodeur);
Animation animBoutons = AnimationUtils.loadAnimation(getApplicationContext(), R.anim.anim_boutons);
animBoutons.setRepeatCount(Animation.INFINITE);
boutonCodeur.setAnimation(animBoutons);
boutonCodeur.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
startActivity(new Intent(MainActivity.this, codeur.class));
}
});
}
}
xml code:
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:shareInterpolator="true"
android:fillAfter="true">
<rotate
android:fromDegrees="0"
android:toDegrees="20"
android:pivotX="50%"
android:pivotY="50%"
android:startOffset="0"
android:duration="1000"
/>
<rotate
android:startOffset="1000"
android:fromDegrees="20"
android:toDegrees="-20"
android:pivotX="50%"
android:pivotY="50%"
android:duration="2000"
/>
<rotate
android:fromDegrees="-20"
android:toDegrees="0"
android:pivotX="50%"
android:pivotY="50%"
android:startOffset="3000"
android:duration="1000"
/>
</set>
Also, Vedprakash Wagh give me the advice to try animBoutons.setRepeatCount(Animation.INFINITE) but it has no effect).
Your app is crashing every time because you're trying to find your ImageButton when the class is created first, and not after the layout is set.
You're getting NullPointerException, as there is no ImageButton with id R.id.boutoncodeur in your View hierarchy when you're trying to find it.
You need to find your ImageView AFTER it is available in your View hierarchy i.e. after your setContentView();
You can either do this:
Remove your second line
ImageButton boutonCodeur = findViewById(R.id.boutoncodeur);
as you've already found your ImageView in your configureCodeurButton() function.
Or, you can keep one class variable of ImageView, and make findViewById call after setContentView like below.
public class MainActivity extends AppCompatActivity {
ImageButton boutonCodeur;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
boutonCodeur = findViewById(R.id.boutoncodeur);
configureCodeurBouton();
}
private void configureCodeurBouton() {
Animation animBoutons = AnimationUtils.loadAnimation(getApplicationContext(), R.anim.anim_boutons);
boutonCodeur.setAnimation(animBoutons);
boutonCodeur.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
startActivity(new Intent(MainActivity.this, codeur.class));
}
});
}
}
You can learn more about NullPointerException here. Also, learn how to read the errors from tutorials that are available. Or, simply open the logcat tab in Android Studio when the error occurs to know what Error you're getting.
To make your animation run infinitely, you can add this in your code.
animation.setRepeatCount(Animation.INFINITE)
I just had to change the whole xml anim_boutons file so I have only one animation and not three rotate animations. the repeatMode line says to repeat the animation backwards at each repeat. This gives the expected effect.
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:shareInterpolator="true"
android:fillAfter="true">
<rotate
android:fromDegrees="-20"
android:toDegrees="20"
android:pivotX="50%"
android:pivotY="50%"
android:startOffset="0"
android:duration="1000"
android:repeatCount="infinite"
android:repeatMode="reverse"
/>
</set>
I have anim file
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:duration="60000"
android:fillAfter="true"
android:interpolator="#android:anim/linear_interpolator"
android:shareInterpolator="false" >
<rotate
android:startOffset="0"
android:fromDegrees="0"
android:pivotX="50%"
android:pivotY="50%"
android:toDegrees="360" />
</set>
and I want animation to start immediately. But is starts after 2-3 sec delay. What can be the reason?
Its working properly in my code. So there are no error in XML. Please check your Java. My Java code is:
void startAnim() {
view.clearAnimation();
Animation anim= AnimationUtils.loadAnimation(MainActivity.this, R.anim.anim);
view.startAnimation(anim);
}
private ImageView logo;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
logo=(ImageView)findViewById(R.id.logo);
Animation myanim = AnimationUtils.loadAnimation(this,R.anim.anim);
logo.startAnimation(myanim);
}
I have this simple arrow image rotation animation which works as intended only for the first time. from second time onward It's still do the rotation but without slow animation.
Here's the code in anim xml files
Rotate 180
<rotate xmlns:android="http://schemas.android.com/apk/res/android"
android:duration="1500"
android:fromDegrees="0"
android:toDegrees="180"
android:interpolator="#android:anim/linear_interpolator"
android:pivotX="50%"
android:pivotY="50%"
android:repeatCount="0"
android:fillAfter="true"
android:fillEnabled="true"/>
Rotate Revere
<rotate xmlns:android="http://schemas.android.com/apk/res/android"
android:duration="1500"
android:fromDegrees="180"
android:toDegrees="0"
android:interpolator="#android:anim/linear_interpolator"
android:pivotX="50%"
android:pivotY="50%"
android:repeatCount="0"
android:fillAfter="true"
android:fillEnabled="true"
/>
The image view inside card view.
<ImageView
android:id="#+id/creadit_card_next_image"
android:layout_width="#dimen/next_image_size"
android:layout_height="#dimen/next_image_size"
android:layout_marginEnd="#dimen/static_menu_primary_margin"
android:layout_marginTop="16dp"
android:rotation="-90"
android:src="#drawable/ic_navigate_next"
android:tint="#color/colorPrimary"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent" />
Java code to trigger Animation.
private Animation rotatePlus180;
private Animation rotateMinus180;
private boolean creditDebitCardViewExpanded = true;
rotatePlus180 = AnimationUtils.loadAnimation(this, R.anim.rotate_plus_180);
rotateMinus180 = AnimationUtils.loadAnimation(this, R.anim.rotate_minus_180);
private void onClickCreditDebitCardView() {
creditDebitCardPaymentMethod.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if (creditDebitCardViewExpanded) {
expandAnimation(paymentRecyclerView);
creditDebitCardViewExpanded = false;
creditCardNextImage.setAnimation(rotatePlus180);
} else {
collapseAnimation(paymentRecyclerView);
creditDebitCardViewExpanded = true;
creditCardNextImage.setAnimation(rotateMinus180);
CreditDebitLayoutContainer.setPadding(0, 0, 0, padding);
}
}
});
}
Instead of setAnimation use startAnimation
creditCardNextImage.startAnimation(rotatePlus180);
creditCardNextImage.startAnimation(rotateMinus180);
setAnimation seems to be called once you attach the animation to the view/ or when the view is added.
StartAnimation will be called all the time even if the view has already been added.
I want to increase/decrease the text size in text view but not by .setTextSize() method . Like when I click a button the size must change from one to another smoothly and not abruptly. The transition must be visible as it is increasing so that a good UI experience is obtained. I tried to use a loop where the size changes by small-small bits but thats also to quick to be visible. So please someone suggest me a method to do this. I am just a beginner in Android
This could be achieved with a ValueAnimator.
Try this :
final TextView tv = new TextView(getApplicationContext());
Button btnPlay = (Button) findViewById(R.id.btnPlay);
btnPlay.setOnClickListener(MainActivity.this);
final float startSize = 42; // Size in pixels
final float endSize = 12;
final int animationDuration = 600; // Animation duration in ms
ValueAnimator animator = ValueAnimator.ofFloat(startSize, endSize);
animator.setDuration(animationDuration);
animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
#Override
public void onAnimationUpdate(ValueAnimator valueAnimator) {
float animatedValue = (float) valueAnimator.getAnimatedValue();
tv.setTextSize(animatedValue);
}
});
#Override
public void onClick(View view)
{
if(view == btnPlay)
{
animator.start();
}
}
Use this code in on click listner of button, where you want to achieve this.
You can perform this using View Animation.
You should refer it from here
create one textanim.xml inside tour res/anim folder. (here add anim folder first in res file if not created.)
your textanim.xml should be look like this.
<set android:shareInterpolator="false">
<scale
android:interpolator="#android:anim/accelerate_decelerate_interpolator"
android:fromXScale="1.0"
android:toXScale="1.4"
android:fromYScale="1.0"
android:toYScale="0.6"
android:pivotX="50%"
android:pivotY="50%"
android:fillAfter="false"
android:duration="700" />
<set android:interpolator="#android:anim/decelerate_interpolator">
<scale
android:fromXScale="1.4"
android:toXScale="0.0"
android:fromYScale="0.6"
android:toYScale="0.0"
android:pivotX="50%"
android:pivotY="50%"
android:startOffset="700"
android:duration="400"
android:fillBefore="false" />
<rotate
android:fromDegrees="0"
android:toDegrees="-45"
android:toYScale="0.0"
android:pivotX="50%"
android:pivotY="50%"
android:startOffset="700"
android:duration="400" />
</set>
</set>
Moving on to the associated java file (inside your Activity), you have to use this animation like this,
TextView mT = (TextView) findViewById(R.id.yourTextViewId);
Animation myAnim = AnimationUtils.loadAnimation(this, R.anim.textanim);
mText.startAnimation(myAnim);