12

我有以下布局片段：

    <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" />

如您所见，animateLayoutChanges设置为trueon LinearLayout，因此当向其中添加项目时，它会为添加设置动画。这没问题，但删除有问题。如果我删除一个项目，动画仍然可以很好地播放，但TextView下面会立即弹出并且不等待动画完成。我怎样才能做到这一点，甚至更好地使TextView动画与动画同步LinearLayout？

4

2 回答 2

25

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()){
                                //....
                                }

            }});
于 2013-07-25T21:26:37.410 回答
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 a 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
    }
}
于 2016-02-03T17:57:48.500 回答