Skip to content

Instantly share code, notes, and snippets.

@castorflex
Last active January 12, 2024 17:49
Star You must be signed in to star a gist
Save castorflex/4e46a9dc2c3a4245a28e to your computer and use it in GitHub Desktop.
public class CircularProgressDrawable extends Drawable
implements Animatable {
private static final Interpolator ANGLE_INTERPOLATOR = new LinearInterpolator();
private static final Interpolator SWEEP_INTERPOLATOR = new DecelerateInterpolator();
private static final int ANGLE_ANIMATOR_DURATION = 2000;
private static final int SWEEP_ANIMATOR_DURATION = 600;
private static final int MIN_SWEEP_ANGLE = 30;
private final RectF fBounds = new RectF();
private ObjectAnimator mObjectAnimatorSweep;
private ObjectAnimator mObjectAnimatorAngle;
private boolean mModeAppearing;
private Paint mPaint;
private float mCurrentGlobalAngleOffset;
private float mCurrentGlobalAngle;
private float mCurrentSweepAngle;
private float mBorderWidth;
private boolean mRunning;
public CircularProgressDrawable(int color, float borderWidth) {
mBorderWidth = borderWidth;
mPaint = new Paint();
mPaint.setAntiAlias(true);
mPaint.setStyle(Paint.Style.STROKE);
mPaint.setStrokeWidth(borderWidth);
mPaint.setColor(color);
setupAnimations();
}
@Override
public void draw(Canvas canvas) {
float startAngle = mCurrentGlobalAngle - mCurrentGlobalAngleOffset;
float sweepAngle = mCurrentSweepAngle;
if (!mModeAppearing) {
startAngle = startAngle + sweepAngle;
sweepAngle = 360 - sweepAngle - MIN_SWEEP_ANGLE;
} else {
sweepAngle += MIN_SWEEP_ANGLE;
}
canvas.drawArc(fBounds, startAngle, sweepAngle, false, mPaint);
}
@Override
public void setAlpha(int alpha) {
mPaint.setAlpha(alpha);
}
@Override
public void setColorFilter(ColorFilter cf) {
mPaint.setColorFilter(cf);
}
@Override
public int getOpacity() {
return PixelFormat.TRANSPARENT;
}
private void toggleAppearingMode() {
mModeAppearing = !mModeAppearing;
if (mModeAppearing) {
mCurrentGlobalAngleOffset = (mCurrentGlobalAngleOffset + MIN_SWEEP_ANGLE * 2) % 360;
}
}
@Override
protected void onBoundsChange(Rect bounds) {
super.onBoundsChange(bounds);
fBounds.left = bounds.left + mBorderWidth / 2f + .5f;
fBounds.right = bounds.right - mBorderWidth / 2f - .5f;
fBounds.top = bounds.top + mBorderWidth / 2f + .5f;
fBounds.bottom = bounds.bottom - mBorderWidth / 2f - .5f;
}
//////////////////////////////////////////////////////////////////////////////
//////////////// Animation
private Property<SmoothCircularIndeterminateProgressBarDrawable, Float> mAngleProperty
= new Property<SmoothCircularIndeterminateProgressBarDrawable, Float>(Float.class, "angle") {
@Override
public Float get(SmoothCircularIndeterminateProgressBarDrawable object) {
return object.getCurrentGlobalAngle();
}
@Override
public void set(SmoothCircularIndeterminateProgressBarDrawable object, Float value) {
object.setCurrentGlobalAngle(value);
}
};
private Property<SmoothCircularIndeterminateProgressBarDrawable, Float> mSweepProperty
= new Property<SmoothCircularIndeterminateProgressBarDrawable, Float>(Float.class, "arc") {
@Override
public Float get(SmoothCircularIndeterminateProgressBarDrawable object) {
return object.getCurrentSweepAngle();
}
@Override
public void set(SmoothCircularIndeterminateProgressBarDrawable object, Float value) {
object.setCurrentSweepAngle(value);
}
};
private void setupAnimations() {
mObjectAnimatorAngle = ObjectAnimator.ofFloat(this, mAngleProperty, 360f);
mObjectAnimatorAngle.setInterpolator(ANGLE_INTERPOLATOR);
mObjectAnimatorAngle.setDuration(ANGLE_ANIMATOR_DURATION);
mObjectAnimatorAngle.setRepeatMode(ValueAnimator.RESTART);
mObjectAnimatorAngle.setRepeatCount(ValueAnimator.INFINITE);
mObjectAnimatorSweep = ObjectAnimator.ofFloat(this, mSweepProperty, 360f - MIN_SWEEP_ANGLE * 2);
mObjectAnimatorSweep.setInterpolator(SWEEP_INTERPOLATOR);
mObjectAnimatorSweep.setDuration(SWEEP_ANIMATOR_DURATION);
mObjectAnimatorSweep.setRepeatMode(ValueAnimator.RESTART);
mObjectAnimatorSweep.setRepeatCount(ValueAnimator.INFINITE);
mObjectAnimatorSweep.addListener(new Animator.AnimatorListener() {
@Override
public void onAnimationStart(Animator animation) {
}
@Override
public void onAnimationEnd(Animator animation) {
}
@Override
public void onAnimationCancel(Animator animation) {
}
@Override
public void onAnimationRepeat(Animator animation) {
toggleAppearingMode();
}
});
}
@Override
public void start() {
if (isRunning()) {
return;
}
mRunning = true;
mObjectAnimatorAngle.start();
mObjectAnimatorSweep.start();
invalidateSelf();
}
@Override
public void stop() {
if (!isRunning()) {
return;
}
mRunning = false;
mObjectAnimatorAngle.cancel();
mObjectAnimatorSweep.cancel();
invalidateSelf();
}
@Override
public boolean isRunning() {
return mRunning;
}
public void setCurrentGlobalAngle(float currentGlobalAngle) {
mCurrentGlobalAngle = currentGlobalAngle;
invalidateSelf();
}
public float getCurrentGlobalAngle() {
return mCurrentGlobalAngle;
}
public void setCurrentSweepAngle(float currentSweepAngle) {
mCurrentSweepAngle = currentSweepAngle;
invalidateSelf();
}
public float getCurrentSweepAngle() {
return mCurrentSweepAngle;
}
}
/**
* Simplest custom view possible, using CircularProgressDrawable
*/
public class CustomView extends View {
private CircularProgressDrawable mDrawable;
public CustomView(Context context) {
this(context, null);
}
public CustomView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public CustomView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
mDrawable = new CircularProgressDrawable(Color.RED, 10);
mDrawable.setCallback(this);
}
@Override
protected void onVisibilityChanged(View changedView, int visibility) {
super.onVisibilityChanged(changedView, visibility);
if (visibility == VISIBLE) {
mDrawable.start();
} else {
mDrawable.stop();
}
}
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
mDrawable.setBounds(0, 0, w, h);
}
@Override
public void draw(Canvas canvas) {
super.draw(canvas);
mDrawable.draw(canvas);
}
@Override
protected boolean verifyDrawable(Drawable who) {
return who == mDrawable || super.verifyDrawable(who);
}
}
@tasneembohra
Copy link

Hi ,

The animation is not starting when you enter first time in the screen, I have checked isRunning also and that is false so that should start

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment