android - Android：隐藏/显示或添加/删除片段

Question

case R.id.section:
int orientation = getResources().getConfiguration().orientation;
FrameLayout FragmentContainer = (FrameLayout) findViewById(R.id.FragmentContainer);

switch (orientation) {
case Configuration.ORIENTATION_LANDSCAPE:
    if (FragmentContainer.getVisibility() == View.VISIBLE) {
        getSupportFragmentManager().beginTransaction().remove(new FragmentOne()).commit();
    } else {
        getSupportFragmentManager().beginTransaction().add(R.id.FragmentContainer, new FragmentOne()).commit();
    }
    break;

case Configuration.ORIENTATION_PORTRAIT:
    if (FragmentContainer.getVisibility() == View.VISIBLE) {
        getSupportFragmentManager().beginTransaction().remove(new FragmentTwo()).commit();
    } else {
        getSupportFragmentManager().beginTransaction().add(R.id.FragmentContainer, new FragmentTwo()).commit();
    }
    break;
}

我正在尝试根据我的框架布局的可见性删除/添加片段，但是当我单击菜单项时，没有任何反应......

下面是我在 XML 中定义的框架布局。

<FrameLayout
        android:id="@+id/FragmentContainer"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:visibility="gone"
     />

我已经尝试add and replace了片段的两种方法。

Answer 1

你framelayout有android:visibility="gone"。在我看不到的代码上FragmentContainer.setVisibility(View.VISIBLE);

只需更改您的两个 if/else 条件...

if (FragmentContainer.getVisibility() == View.VISIBLE) {
    getSupportFragmentManager().beginTransaction().remove(new FragmentOne()).commit();
    FragmentContainer.setVisibility(View.GONE);
   } else {
    getSupportFragmentManager().beginTransaction().add(R.id.FragmentContainer, new FragmentOne()).commit();
    FragmentContainer.setVisibility(View.VISIBLE);
}