Я хочу анимировать слайд вниз и слайд вверх в расширяемом списке, когда я нажимаю элемент группы. Затем я заканчиваю слайд вниз.
public class ExpandAnimation extends Animation {
private static final String TAG = "ExpandAnimation";
private View mAnimatedView;
private LayoutParams mViewLayoutParams;
private int mMarginStart, mMarginEnd;
private boolean mIsVisibleAfter = false;
private boolean mWasEndedAlready = false;
/**
* Initialize the animation
* @param view The layout we want to animate
* @param duration The duration of the animation, in ms
*/
public ExpandAnimation(View view, int duration) {
setDuration(duration);
mAnimatedView = view;
mViewLayoutParams = (LayoutParams) view.getLayoutParams();
// if the bottom margin is 0,
// then after the animation will end it'll be negative, and invisible.
mIsVisibleAfter = (mViewLayoutParams.bottomMargin == 0);
mMarginStart = mViewLayoutParams.bottomMargin;
Log.i(TAG, "mMarginStart:>>>>>>>"+mMarginStart);
mMarginEnd = (mMarginStart == 0 ? (0- view.getHeight()) : 0);
Log.i(TAG, "mMarginEnd:>>>>>>>"+mMarginEnd);
view.setVisibility(View.VISIBLE);
}
@Override
protected void applyTransformation(float interpolatedTime, Transformation t) {
super.applyTransformation(interpolatedTime, t);
Log.i(TAG, "applyTransformation-->"+interpolatedTime);
if (interpolatedTime < 1.0f) {
// Calculating the new bottom margin, and setting it
mViewLayoutParams.bottomMargin = mMarginStart
+ (int) ((mMarginEnd - mMarginStart) * interpolatedTime);
// Invalidating the layout, making us seeing the changes we made
mAnimatedView.requestLayout();
// Making sure we didn't run the ending before (it happens!)
} else if (!mWasEndedAlready) {
mViewLayoutParams.bottomMargin = mMarginEnd;
mAnimatedView.requestLayout();
if (mIsVisibleAfter) {
mAnimatedView.setVisibility(View.GONE);
}
mWasEndedAlready = true;
}
}
}
public View getChildView(int groupPosition, int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
Log.i(TAG, "getChildView");
@SuppressWarnings("unchecked")
String text = ((Map<String, String>) getChild(groupPosition,
childPosition)).get("child");
if (convertView == null) {
LayoutInflater layoutInflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = layoutInflater.inflate(R.layout.child, null);
}
View toolbar = convertView.findViewById(R.id.toolbar);
setAnimationView(toolbar);
((LinearLayout.LayoutParams) toolbar.getLayoutParams()).bottomMargin = -75;
toolbar.setVisibility(View.GONE);
ExpandAnimation expandAni = new ExpandAnimation(toolbar, 1000);
toolbar.startAnimation(expandAni);
TextView tv = (TextView) convertView.findViewById(R.id.childTo);
tv.setText(text);
return convertView;
}
Но когда я щелкаю элемент groupItem, чтобы свернуть группу, он не вызывает метод getChildView(). Итак, как я могу вызвать getChildView() и позволить ему скользить вверх?
