更改navigationView的单个特定菜单项的背景颜色

问题描述

我想在导航抽屉里的android菜单中设置所有标题项的背景颜色。我的布局如下：

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>

结果应如下：

我发现我可以使用以下内容设置文字颜色：

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); }

但我如何设置填充背景颜色？

But how can i set the filling background color?

推荐答案

AFAIK 使用菜单这是不可能的，您需要创建自定义 navigationView

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

当您使用 BackgroundColorSpan 来设置菜单项的背景时，它只将背景设置为菜单项标题而不是整个视图

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

<?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>

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;
    }
}

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);
        }
    }
}

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;
    }
}

输出

这篇关于更改navigationView的单个特定菜单项的背景颜色的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！