java - Change background color of single specific menu items of navigationView

Question

I want to set the background color of all header items in a android menu within a navigation drawer. My layout looks like:

<menu xmlns:android="http://schemas.android.com/apk/res/android">
  <item android:title="TopItem" android:id="@+id/top_item1"> // Here i want to set the background
    <menu>
      <group>
        <item android:id="@+id/sub_item1"
            android:title="SubItem" /> // Here no background
      </group>
    </menu>
  </item>
  <item android:title="TopItem" android:id="@+id/top_item2">
    <menu>
      <group>
       <item android:id="@+id/sub_item2"
            android:title="SubItem" />
        <item android:id="@+id/sub_item3"
            android:title="SubItem" />
       <item android:id="@+id/sub_item4"
            android:title="SubItem" />
      </group>
    </menu>
</menu>

Result should kinda look like:

I found out that i can set the text color by using something like:

MenuItem menuItem = navigationView.getMenu().findItem(R.id.menu_item);
SpannableString s = new SpannableString(menuItem.getTitle());
s.setSpan(new TextAppearanceSpan(this, R.style.TextAppearance), 0, s.length(), 0);

if (menuItem.getItemId()==R.id.nav_targets){            
  menuItem.setTitle(s); }

But how can i set the filling background color?

Answer 1

Change background color of single specific menu items

AFAIK Using menu this is not possible you need to create custom navigationView

When you use BackgroundColorSpan to set background to your menu item it only set the background to menu item title not whole view

OUTPUT USING BackgroundColorSpan

Try this way using RecyclerView

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout 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/drawer_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true"
    tools:openDrawer="start">

    <include
        layout="@layout/app_bar_main"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

    <android.support.design.widget.NavigationView
        android:id="@+id/nav_view"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        android:fitsSystemWindows="true">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical">

            <include layout="@layout/nav_header_main" />

            <android.support.v7.widget.RecyclerView
                android:id="@+id/navRecyclerView"
                android:layout_width="match_parent"
                android:layout_height="wrap_content" />

        </LinearLayout>
    </android.support.design.widget.NavigationView>

</android.support.v4.widget.DrawerLayout>

MainActivity

public class MainActivity extends AppCompatActivity
        implements NavigationView.OnNavigationItemSelectedListener {

    RecyclerView navRecyclerView;
    LinearLayoutManager layoutManager;
    ArrayList<NavigationDataModel> arrayList = new ArrayList<>();
    NavigationAdapter adapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
                this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
        drawer.addDrawerListener(toggle);
        toggle.syncState();

        NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);

        navigationView.setNavigationItemSelectedListener(this);

        navRecyclerView = findViewById(R.id.navRecyclerView);
        navRecyclerView.setHasFixedSize(true);
        layoutManager = new LinearLayoutManager(this);
        navRecyclerView.setLayoutManager(layoutManager);

        initArray();

        adapter = new NavigationAdapter(this, arrayList);
        navRecyclerView.setAdapter(adapter);


    }

    private void initArray() {

        NavigationDataModel model = new NavigationDataModel();
        model.setColor(ContextCompat.getColor(this, R.color.colorPrimary));
        model.setIcon(R.drawable.ic_menu_gallery);
        model.setTitle("Item 1");
        arrayList.add(model);


        NavigationDataModel model2 = new NavigationDataModel();
        model2.setColor(ContextCompat.getColor(this, R.color.colorRed));
        model2.setIcon(R.drawable.ic_menu_camera);
        model2.setTitle("Item 2");
        arrayList.add(model2);

        NavigationDataModel model3 = new NavigationDataModel();
        model3.setColor(ContextCompat.getColor(this, R.color.colorGreen));
        model3.setIcon(R.drawable.ic_menu_send);
        model3.setTitle("Item 3");
        arrayList.add(model3);

        NavigationDataModel model4 = new NavigationDataModel();
        model4.setColor(ContextCompat.getColor(this, R.color.colorPink));
        model4.setIcon(R.drawable.ic_menu_share);
        model4.setTitle("Item 4");
        arrayList.add(model4);

    }

    @Override
    public void onBackPressed() {
        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        if (drawer.isDrawerOpen(GravityCompat.START)) {
            drawer.closeDrawer(GravityCompat.START);
        } else {
            super.onBackPressed();
        }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

    @SuppressWarnings("StatementWithEmptyBody")
    @Override
    public boolean onNavigationItemSelected(MenuItem item) {
        // Handle navigation view item clicks here.
        int id = item.getItemId();


        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        drawer.closeDrawer(GravityCompat.START);
        return true;
    }
}

NavigationAdapter

public class NavigationAdapter extends RecyclerView.Adapter<NavigationAdapter.ViewHolder> {

    Context context;
    ArrayList<NavigationDataModel> arrayList = new ArrayList<>();

    public NavigationAdapter(Context context, ArrayList<NavigationDataModel> arrayList) {
        this.context = context;
        this.arrayList = arrayList;
    }

    @NonNull
    @Override
    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(context).inflate(R.layout.custom_layout, parent, false);
        return new ViewHolder(view);
    }

    @Override
    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {

        holder.navIcon.setImageResource(arrayList.get(position).getIcon());
        holder.rootView.setBackgroundColor(arrayList.get(position).getColor());
        holder.navTitle.setText(arrayList.get(position).getTitle());
    }

    @Override
    public int getItemCount() {
        return arrayList.size();
    }

    public class ViewHolder extends RecyclerView.ViewHolder {
        ImageView navIcon;
        TextView navTitle;
        LinearLayout rootView;

        public ViewHolder(View itemView) {
            super(itemView);
            rootView = itemView.findViewById(R.id.rootView);
            navIcon = itemView.findViewById(R.id.navIcon);
            navTitle = itemView.findViewById(R.id.navTitle);
        }
    }
}

NavigationDataModel

public class NavigationDataModel {
    private int icon, color;
    private String title;

    public int getIcon() {
        return icon;
    }

    public void setIcon(int icon) {
        this.icon = icon;
    }

    public int getColor() {
        return color;
    }

    public void setColor(int color) {
        this.color = color;
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }
}

OUTPUT