我将单个活动多片段与导航组件一起使用。如何隐藏某些片段的底部导航栏?
我尝试了以下操作:
1-通过数据绑定控制底部导航栏的可见性。(越野车)2-在打开片段之前和在后堆栈上切换底部导航可见性(越野车)3-使2个主机片段1全屏显示1受底部导航约束4-制作2个航海图..
activity_main.xml:
<com.google.android.material.bottomnavigation.BottomNavigationView
android:id="@+id/bottomNavigation"
android:visibility="@{viewModel.uiUtils.shouldShow ? View.VISIBLE:View.GONE}"/>
mainactivity.java:
private void observeShouldShow() {
mainViewModel.uiUtils.getShouldShow().observe(this, new Observer<Boolean>() {
@Override
public void onChanged(Boolean aBoolean) {
ViewGroup.LayoutParams layoutParams = binding.bottomNavigation.getLayoutParams();
if (mainViewModel.getUiUtils().getShouldShow().getValue()) {
binding.bottomNavigation.setVisibility(View.VISIBLE);
layoutParams.height = 170;
binding.bottomNavigation.setLayoutParams(layoutParams);
} else {
layoutParams.height = 0;
binding.bottomNavigation.setLayoutParams(layoutParams);
binding.bottomNavigation.setVisibility(View.INVISIBLE);
}
}
});
在全屏片段和普通片段之间切换时,底部导航栏闪烁
官方文档建议使用OnDestinationChangedListener
处理此问题。 Look here.