@Override
public void onAnimationEnd(Animation animation) {
if (mRefreshing) {
// Make sure the progress view is fully visible
mProgress.setAlpha(MAX_ALPHA);
mProgress.start();
if (mNotify) {
if (mListener != null) {
mListener.onRefresh();
}
}
} else {
mProgress.stop();
mCircleView.setVisibility(View.GONE);
setColorViewAlpha(MAX_ALPHA);
// Return the circle to its start position
if (mScale) {
setAnimationProgress(0 /* animation complete and view is hidden */);
} else {
setTargetOffsetTopAndBottom(
mOriginalOffsetTop - mCurrentTargetOffsetTop, true /* requires update */);
}
}
mCurrentTargetOffsetTop = mCircleView.getTop();
}
@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
ensureTarget();
final int action = MotionEventCompat.getActionMasked(ev);
if (mReturningToStart && action == MotionEvent.ACTION_DOWN) {
mReturningToStart = false;
}
if (!isEnabled() || mReturningToStart || canChildScrollUp() || mRefreshing) {
// Fail fast if we're not in a state where a swipe is possible
return false;
}
switch (action) {
case MotionEvent.ACTION_DOWN:
setTargetOffsetTopAndBottom(mOriginalOffsetTop - mCircleView.getTop(), true);
mActivePointerId = MotionEventCompat.getPointerId(ev, 0);
mIsBeingDragged = false;
final float initialDownY = getMotionEventY(ev, mActivePointerId);
if (initialDownY == -1) {
return false;
}
mInitialDownY = initialDownY;
break;
case MotionEvent.ACTION_MOVE:
if (mActivePointerId == INVALID_POINTER) {
Log.e(LOG_TAG, "Got ACTION_MOVE event but don't have an active pointer id.");
return false;
}
final float y = getMotionEventY(ev, mActivePointerId);
if (y == -1) {
return false;
}
final float yDiff = y - mInitialDownY;
if (yDiff > mTouchSlop && !mIsBeingDragged) {
mInitialMotionY = mInitialDownY + mTouchSlop;
mIsBeingDragged = true;
mProgress.setAlpha(STARTING_PROGRESS_ALPHA);
}
break;
case MotionEventCompat.ACTION_POINTER_UP:
onSecondaryPointerUp(ev);
break;
case MotionEvent.ACTION_UP:
case MotionEvent.ACTION_CANCEL:
mIsBeingDragged = false;
mActivePointerId = INVALID_POINTER;
break;
}
return mIsBeingDragged;
}
private void startScaleUpAnimation(AnimationListener listener) {
mCircleView.setVisibility(View.VISIBLE);
if (android.os.Build.VERSION.SDK_INT >= 11) {
// Pre API 11, alpha is used in place of scale up to show the
// progress circle appearing.
// Don't adjust the alpha during appearance otherwise.
mProgress.setAlpha(MAX_ALPHA);
}
mScaleAnimation =
new Animation() {
@Override
public void applyTransformation(float interpolatedTime, Transformation t) {
setAnimationProgress(interpolatedTime);
}
};
mScaleAnimation.setDuration(mMediumAnimationDuration);
if (listener != null) {
mCircleView.setAnimationListener(listener);
}
mCircleView.clearAnimation();
mCircleView.startAnimation(mScaleAnimation);
}
private void setColorViewAlpha(int targetAlpha) {
mCircleView.getBackground().setAlpha(targetAlpha);
mProgress.setAlpha(targetAlpha);
}