private void setState(State state) {
this.state = state;
switch (state) {
case PULL_TO_REFRESH:
spinner.setVisibility(View.INVISIBLE);
image.setVisibility(View.VISIBLE);
text.setText(pullToRefreshText);
if (showLastUpdatedText && lastUpdated != -1) {
lastUpdatedTextView.setVisibility(View.VISIBLE);
lastUpdatedTextView.setText(
String.format(lastUpdatedText, lastUpdatedDateFormat.format(new Date(lastUpdated))));
}
break;
case RELEASE_TO_REFRESH:
spinner.setVisibility(View.INVISIBLE);
image.setVisibility(View.VISIBLE);
text.setText(releaseToRefreshText);
break;
case REFRESHING:
setUiRefreshing();
lastUpdated = System.currentTimeMillis();
if (onRefreshListener == null) {
setState(State.PULL_TO_REFRESH);
} else {
onRefreshListener.onRefresh();
}
break;
}
}
private void setUiRefreshing() {
spinner.setVisibility(View.VISIBLE);
image.clearAnimation();
image.setVisibility(View.INVISIBLE);
text.setText(refreshingText);
}
@Override
public boolean onTouchEvent(MotionEvent event) {
if (lockScrollWhileRefreshing
&& (state == State.REFRESHING || getAnimation() != null && !getAnimation().hasEnded())) {
return true;
}
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
if (getFirstVisiblePosition() == 0) previousY = event.getY();
else previousY = -1;
break;
case MotionEvent.ACTION_UP:
if (previousY != -1
&& (state == State.RELEASE_TO_REFRESH || getFirstVisiblePosition() == 0)) {
switch (state) {
case RELEASE_TO_REFRESH:
setState(State.REFRESHING);
bounceBackHeader();
break;
case PULL_TO_REFRESH:
resetHeader();
break;
default:
break;
}
}
break;
case MotionEvent.ACTION_MOVE:
if (previousY != -1) {
float y = event.getY();
float diff = y - previousY;
if (diff > 0) diff /= PULL_RESISTANCE;
previousY = y;
int newHeaderPadding = Math.max(Math.round(headerPadding + diff), -header.getHeight());
if (newHeaderPadding != headerPadding && state != State.REFRESHING) {
setHeaderPadding(newHeaderPadding);
if (state == State.PULL_TO_REFRESH && headerPadding > 0) {
setState(State.RELEASE_TO_REFRESH);
image.clearAnimation();
image.startAnimation(flipAnimation);
} else if (state == State.RELEASE_TO_REFRESH && headerPadding < 0) {
setState(State.PULL_TO_REFRESH);
image.clearAnimation();
image.startAnimation(reverseFlipAnimation);
}
return true;
}
}
break;
}
return super.onTouchEvent(event);
}