我正在使用the following example的BottomNavigationDrawer / BottomSheetDialog，但我无法在底部导航菜单中为所选项目设置文本和背景颜色。
我尝试了以下SO问题的解决方案，但似乎根本没有效果，我的菜单都显示在菜单背景颜色（白色）上的colorPrimary（黑色），没有选择项目的分隔符或指示符。
我试过this question，this one，this one，this one和this one，都无济于事。
任何人都可以向我指出我做错了什么吗？这时，我的代码如下：
BottomSheetDialogFragment
public class BottomNavigationDrawerFragment extends BottomSheetDialogFragment {
BottomNavigationDrawerFragment fragment;
NavigationView navigationView;
ImageView close, menu;
Statuser statuser;
RevivDatabase database;
String email, fname, lname;
TextView txtUsername, txtEmail;
public BottomNavigationDrawerFragment() {
// Required empty public constructor
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_bottomsheet, container, false);
txtUsername = view.findViewById(R.id.txtUsername);
txtEmail = view.findViewById(R.id.txtEmail);
navigationView = view.findViewById(R.id.navigation_view);
database = RevivDatabase.getDatabase(getActivity());
statuser = database.revivDao().getUserDetails();
fname = statuser.getFname();
lname = statuser.getLname();
email = statuser.getEmail();
txtEmail.setText(email);
txtUsername.setText(fname+" "+lname);
close = view.findViewById(R.id.imgClose);
fragment = this;
close.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
fragment.dismiss();
}
});
navigationView.setItemIconTintList(null);
navigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem menuItem) {
menuItem.setChecked(true);
int id = menuItem.getItemId();
switch (id){
case R.id.app_bar_incident:
navigationView.getMenu().findItem(id).setChecked(true);
getActivity().getSupportFragmentManager().beginTransaction().replace(R.id.containerFrameLayout, new FragmentRevivIncidentDashboard()).commit();
fragment.dismiss();
break;
case R.id.app_bar_housecall:
navigationView.getMenu().findItem(id).setChecked(true);
getActivity().getSupportFragmentManager().beginTransaction().replace(R.id.containerFrameLayout, new FragmentRevivHousecallDashboard()).commit();
fragment.dismiss();
Toast.makeText(getContext(), "Request Housecall", Toast.LENGTH_SHORT).show();
break;
case R.id.settings:
navigationView.getMenu().findItem(id).setChecked(true);
getActivity().getSupportFragmentManager().beginTransaction().replace(R.id.containerFrameLayout, new FragmentRevivSettingsMain()).commit();
Toast.makeText(getActivity().getApplicationContext(), "Settings", Toast.LENGTH_SHORT).show();
fragment.dismiss();
break;
}
return true;
}
});
return view;
}
}
BottomSheetLayout
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/bottomsheet_menu"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:alpha="1">
<android.support.constraint.ConstraintLayout
android:id="@+id/constraintLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/colorPrimary"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent">
<TextView
android:id="@+id/txtUsername"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="4dp"
android:text="User Name"
android:textAppearance="@style/TextAppearance.AppCompat.Medium"
android:textColor="@color/label_text_light"
android:textSize="14sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toEndOf="@+id/imageView4"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.3" />
<ImageView
android:id="@+id/imageView4"
android:layout_width="63dp"
android:layout_height="65dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:srcCompat="@drawable/baseline_face_white_48" />
<TextView
android:id="@+id/txtEmail"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:text="Email Address"
android:textColor="@color/colorText"
android:textSize="10sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="@+id/txtUsername"
app:layout_constraintTop_toBottomOf="@+id/txtUsername"
app:layout_constraintVertical_bias="0.0" />
<ImageView
android:id="@+id/imgClose"
android:layout_width="24dp"
android:layout_height="24dp"
android:layout_marginBottom="8dp"
android:layout_marginEnd="16dp"
android:layout_marginTop="8dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:srcCompat="@drawable/baseline_close_white_48dp" />
</android.support.constraint.ConstraintLayout>
<android.support.design.widget.NavigationView
android:id="@+id/navigation_view"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
app:itemTextAppearance="@style/TextAppearance.AppCompat.Body2"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toBottomOf="@+id/constraintLayout"
app:itemIconTint="@color/drawer_item"
app:itemTextColor="@color/drawer_item"
app:itemBackground="@drawable/menu_background_color"
app:menu="@menu/bottom_nav_drawer_menu">
<!-- REMNANTS
app:itemIconTint="@color/drawer_item"
app:theme="@style/ThemeOverlay.AppCompat.navTheme"
app:itemBackground="@drawable/nav_item_drawable"
app:itemTextColor="@color/drawer_item"
app:itemBackground="@android:color/transparent"-->
</android.support.design.widget.NavigationView>
</android.support.constraint.ConstraintLayout>
主要活动的相关部分，其中设置了底部应用栏和BottomNav
public class Reviv extends AppCompatActivity implements LocationListener{
public static String TAG = "Reviv Main";
private BottomAppBar bottom_app_bar;
BottomNavigationDrawerFragment fragment;
private FragmentManager manager = this.getSupportFragmentManager();
// Functions
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Fabric.with(this, new Crashlytics());
setContentView(R.layout.activity_reviv);
uberLayout = findViewById(R.id.uberLayout);
floatingActionButton = findViewById(R.id.floatingActionButton);
floatingActionButton.setImageResource(R.drawable.baseline_add_white_24dp);
final Activity activity = this;
database = RevivDatabase.getDatabase(this);
viewModel = ViewModelProviders.of(this).get(RevivViewModel.class);
// ask for permissions
displayLocationSettingsRequest(getApplicationContext());
bringLocationUpdation(this);
params = defaultParams();
bottom_app_bar = findViewById(R.id.bottom_app_bar);
setSupportActionBar(bottom_app_bar);
fragment = new BottomNavigationDrawerFragment();
bottom_app_bar.replaceMenu(R.menu.bottomappbar_menu_home);
bottom_app_bar.setOnMenuItemClickListener(new Toolbar.OnMenuItemClickListener() {
@Override
public boolean onMenuItemClick(MenuItem menuItem) {
switch (menuItem.getItemId()){
case R.id.mnu_app_signout:
Toast.makeText(getApplicationContext(), "Sign Out", Toast.LENGTH_SHORT).show();
break;
case android.R.id.home:
fragment.show(manager, fragment.getTag());
//navigationView.getMenu().getItem(0).setChecked(true);
break;
}
return true;
}
});
bottom_app_bar.setNavigationOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
fragment = new BottomNavigationDrawerFragment();
fragment.show(getSupportFragmentManager(), fragment.getTag());
}
});
// ask for permissions
if (ContextCompat.checkSelfPermission(this,
android.Manifest.permission.INTERNET)
!= PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(this,
new String[]{android.Manifest.permission.INTERNET},
MY_PERMISSIONS_ACCESS_INTERNET);
}
if (manager.findFragmentById(R.id.containerFrameLayout) == null) {
Log.d(TAG, "onCreate: transaction manager state is Empty: "+ manager.beginTransaction().isEmpty());
// instantiate fragment and add to view
Fragment mFragment = new FragmentRevivIncidentDashboard();
manager.beginTransaction().replace(R.id.containerFrameLayout, mFragment ).commit();
} else {
Log.d(TAG, "onCreate: transaction manager state is Empty: "+ manager.beginTransaction().isEmpty());
}
}
}
[更新] - 根据@TheWanderer的要求添加可绘制文件的内容
Drawable - menu_background_color.xml
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="@android:color/transparent" android:state_checked="false"/>
<item android:drawable="@color/deeppurple" android:state_checked="true"/>
</selector>
感谢@TheWanderer的深刻质疑，我终于明白了。
首先，我将menu_background.xml更改为：
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="@color/periwinklegray" android:state_checked="true" />
<item android:drawable="@color/transparent" android:state_checked="false" />
</selector>
从this website，我在默认菜单选项中添加了默认的“已检查”状态。然而，除了突出（永久）第一个选项之外，没有真正的改进。
我终于想通了在BottomAppBar上的每个菜单按钮上单击（R.id.home），正在创建一个新的导航表实例，这很容易通过更改来修复
bottom_app_bar.setNavigationOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
fragment = new BottomNavigationDrawerFragment();
fragment.show(getSupportFragmentManager(), fragment.getTag());
}
});
对此
bottom_app_bar.setNavigationOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if(fragment == null) fragment = new BottomNavigationDrawerFragment();
fragment.show(getSupportFragmentManager(), fragment.getTag());
}
});