我有以下布局代码段:
<LinearLayout
android:id="@+id/tagContainer"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:animateLayoutChanges="true" >
</LinearLayout>
<TextView
android:id="@+id/commentLabel"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/tagContainer" />
正如您所看到的,animateLayoutChanges
上的true
设置为LinearLayout
,因此当项目添加到其中时,它会为添加设置动画。这没关系,但删除有问题。如果我删除一个项目,动画仍然可以正常播放,但下面的TextView
会立即弹出并且不会等待动画完成。如何实现这一目标,甚至更好,使TextView
动画与LinearLayout
动画同步?
答案 0 :(得分:20)
您可以通过以下方式从视图中检索LayoutTransition:
mLinearLayout = findViewById(R.id.myLayout);
LayoutTransition layoutTransition = mLinearLayout.getLayoutTransition();
layoutTransition.addTransitionListener(new TransitionListener(){
@Override
public void endTransition(LayoutTransition arg0, ViewGroup arg1,
View arg2, int arg3) {
switch(arg2.getId()){
//....
}
}
@Override
public void startTransition(LayoutTransition transition,
ViewGroup container, View view, int transitionType) {
switch(view.getId()){
//....
}
}});
答案 1 :(得分:2)
这不是一个答案,而是一个现成的代码片段,您可以尝试检查正在发生的事情。
mContainer = (ViewGroup) v.findViewById(R.id.container);
if (Build.VERSION.SDK_INT >= 11) {
mLayoutTransition = mContainer.getLayoutTransition();
if (mLayoutTransition != null) {
mLayoutTransition.addTransitionListener(new LayoutTransition.TransitionListener() {
@Override
public void startTransition(LayoutTransition transition, ViewGroup container, View view, int transitionType) {
Log.d("\n\n startTransition: in "+container+" view "+view+" type "+ descr(transitionType));
}
@Override
public void endTransition(LayoutTransition transition, ViewGroup container, View view, int transitionType) {
Log.d("\n\n endTransition: in "+container+" view "+view+" type "+ descr(transitionType));
}
String descr(int transitionType) {
String[] m = new String[]{"CHANGE_APPEARING","CHANGE_DISAPPEARING","APPEARING","DISAPPEARING"};
return "" + transitionType + ": " + m[transitionType&3] + " changing="+( transitionType&LayoutTransition.CHANGING);
}
});
}
}
对我来说,容器视图是LinearLayout
,感兴趣的事件是:
public void endTransition(LayoutTransition transition, ViewGroup container, View view, int transitionType) { // UI thread
if (transitionType == LayoutTransition.DISAPPEARING) {
// start 2nd animation, it will be done while another view is moved
}
}