BottomNavigationView-如何获取选定的菜单项? [英] BottomNavigationView - How to get selected menu item?
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问题描述
我使用BottomNavigationView切换片段。如何获取当前选择的菜单项,以防止重新打开片段?
I used BottomNavigationView to switch fragments. How to get currently selected menu item, to prevent reopening fragment ?
BottomNavigationView bottomNavigationView = (BottomNavigationView)
findViewById(R.id.bottom_navigation);
bottomNavigationView.setOnNavigationItemSelectedListener(
new BottomNavigationView.OnNavigationItemSelectedListener() {
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem item) {
switch (item.getItemId()) {
case R.id.action_1:
// open fragment 1
break;
case R.id.action_2:
// open fragment 2
break;
case R.id.action_3:
// open fragment 3
break;
}
return false;
}
});
}
推荐答案
解决方案:
private int getSelectedItem(BottomNavigationView bottomNavigationView) {
Menu menu = bottomNavigationView.getMenu();
for (int i = 0; i < bottomNavigationView.getMenu().size(); i++) {
MenuItem menuItem = menu.getItem(i);
if (menuItem.isChecked()) {
return menuItem.getItemId();
}
}
return 0;
}
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