我正在做一个项目，我想根据 Material Design 使用 Circular Reveal 效果。项目有 minSDK = 11，所以为了与棒棒糖之前的设备兼容，我正在使用这个库https://github.com/ozodrukh/CircularReveal
我有一个带有 FloatingActionButton 的片段，当点击它时，它将在 CardView 中转换自身，就像这里描述的FAB 转换。
一旦卡片显示出来，它就会有一个按钮来恢复动画，将卡片重新转换为 FAB。现在我的问题是这样的：假设用户点击 FAB 并显示 CardView。现在用户旋转他的设备，因此活动重置片段。我想要实现的是卡片保持可见和显示，而 FAB 应该被禁用和不可见。问题是，如果我只是setVisibility(View.INVISIBLE)在我的 FAB 上使用它就不起作用（请注意，如果我getVisibility()在将其设置为不可见后使用它，它会正确返回值 4 == View.INVISIBLE，但工厂仍然可见） . 我必须以至少 50-100 毫秒的延迟将setVisibility(...)呼叫包装在 a 内，以使工厂不可见。postDelayed()
所以我的问题是：我做的事情是正确的还是有更好的方法来完成我想要的（因为它对我来说似乎很丑陋）？
这是一些代码。这是我的片段的 XML 布局：
<android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.AppBarLayout
android:id="@+id/my_appbar"
android:layout_width="match_parent"
android:layout_height="@dimen/toolbar_expanded_height"
android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">
<android.support.design.widget.CollapsingToolbarLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
app:expandedTitleMarginEnd="64dp"
app:expandedTitleMarginStart="70dp"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<android.support.v7.widget.Toolbar
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:popupTheme="@style/ToolbarPopupTheme"
app:layout_collapseMode="pin"/>
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
...
<io.codetail.widget.RevealFrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<include layout="@layout/my_fragment" />
</io.codetail.widget.RevealFrameLayout>
<android.support.design.widget.FloatingActionButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="@dimen/fab_margin"
app:fabSize="mini"
app:layout_anchor="@+id/my_appbar"
app:layout_anchorGravity="bottom|left|start" />
</android.support.design.widget.CoordinatorLayout>
这是包含的 CardView 的 XML 布局：
<android.support.v7.widget.CardView
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="16dp"
android:layout_gravity="center"
card_view:cardCornerRadius="2dp"
android:visibility="invisible"
android:focusableInTouchMode="true">
<RelativeLayout android:layout_width="match_parent"
android:layout_height="match_parent">
...
<LinearLayout android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:gravity="end">
<Button android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:text="Ok" />
<Button android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Cancel" />
</LinearLayout>
</RelativeLayout>
</android.support.v7.widget.CardView>
这是我的片段的代码：
public class MyFragment extends Fragment {
private static final String CARD_OPEN_TAG = "CARD_OPEN_TAG";
public static MyFragment newInstance(){
return new MyFragment();
}
private int cardOpen;
private FloatingActionButton fabAddPublication;
private CardView card;
private Button cardCancel;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
final View rootView = inflater.inflate(R.layout.fragment_magazines, container, false);
toolbar = (Toolbar) rootView.findViewById(R.id.layout);
...
// Initialize view status
if (savedInstanceState != null){
cardOpen = savedInstanceState.getInt(CARD_OPEN_TAG);
} else {
cardOpen = -1;
}
...
// Get FAB reference
fab = (FloatingActionButton) rootView.findViewById(R.id.fab_id);
// Get card reference
card = (CardView) rootView.findViewById(R.id.card_id);
editorPublication.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
// Using this event because I need my card to be measured to move correctly fab at his center
if (cardOpen != -1){
// Move FAB to center of card
fab.setTranslationX(coordX); // WORKS
fab.setTranslationY(coordY); // WORKS
// fab.setVisibility(View.INVISIBLE) -> DOESN'T WORK, fab remain visible on top and at center of my card
// Ugly workaround
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
// Hide FAB
fab.setVisibility(View.INVISIBLE);
}
}, 50); // Sometimes fails: if device/emulator use too much time to "rotate" screen, fab stay visible
// Remove listener
ViewTreeObserver obs = card.getViewTreeObserver();
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN)
obs.removeOnGlobalLayoutListener(this);
else obs.removeGlobalOnLayoutListener(this);
}
}
});
if (editorOpen != -1){
fab.setEnabled(false); // WORKS
card.setVisibility(View.VISIBLE); // WORKS
}
// Get editors buttons reference
cardCancel = (Button) card.findViewById(R.id.card_cancel_id);
// Set FAB listener
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// Explode FAB
explodeFab(fab, card); // This method trigger the reveal animation
cardOpen = card.getId();
}
});
// Set editors button listeners
cardCancel.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// Implode FAB
implodeFAB(fab, card); // This card reverts the reveal animation
cardOpen = -1;
}
});
...
return rootView;
}
@Override
public void onSaveInstanceState(Bundle outState){
super.onSaveInstanceState(outState);
...
outState.putInt(CARD_OPEN_TAG, cardOpen);
}
}