看到新的指南出来了,并在google photos
最新的应用程序中使用。不知道如何使用新的底部导航栏。翻阅新的支持库,没有找到任何线索。
找不到任何官方样品。
如何使用新的底栏?不想做任何定制。
看到新的指南出来了,并在google photos
最新的应用程序中使用。不知道如何使用新的底部导航栏。翻阅新的支持库,没有找到任何线索。
找不到任何官方样品。
如何使用新的底栏?不想做任何定制。
我想你可能会找这个。
这是一个快速入门的片段:
public class MainActivity extends AppCompatActivity {
private BottomBar mBottomBar;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Notice how you don't use the setContentView method here! Just
// pass your layout to bottom bar, it will be taken care of.
// Everything will be just like you're used to.
mBottomBar = BottomBar.bind(this, R.layout.activity_main,
savedInstanceState);
mBottomBar.setItems(
new BottomBarTab(R.drawable.ic_recents, "Recents"),
new BottomBarTab(R.drawable.ic_favorites, "Favorites"),
new BottomBarTab(R.drawable.ic_nearby, "Nearby"),
new BottomBarTab(R.drawable.ic_friends, "Friends")
);
mBottomBar.setOnItemSelectedListener(new OnTabSelectedListener() {
@Override
public void onItemSelected(final int position) {
// the user selected a new tab
}
});
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
mBottomBar.onSaveInstanceState(outState);
}
}
这里是参考链接。
https://github.com/roughike/BottomBar
编辑新版本。
底部导航视图在材料设计指南中已有一段时间了,但我们将其实现到我们的应用程序中并不容易。一些应用程序已经构建了自己的解决方案,而其他应用程序则依赖第三方开源库来完成工作。现在设计支持库看到添加了这个底部导航栏,让我们深入了解如何使用它!
如何使用 ?
首先,我们需要更新我们的依赖!
compile ‘com.android.support:design:25.0.0’
设计 xml。
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<!-- Content Container -->
<android.support.design.widget.BottomNavigationView
android:id="@+id/bottom_navigation"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
app:itemBackground="@color/colorPrimary"
app:itemIconTint="@color/white"
app:itemTextColor="@color/white"
app:menu="@menu/bottom_navigation_main" />
</RelativeLayout>
根据您的要求创建菜单。
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<item
android:id="@+id/action_favorites"
android:enabled="true"
android:icon="@drawable/ic_favorite_white_24dp"
android:title="@string/text_favorites"
app:showAsAction="ifRoom" />
<item
android:id="@+id/action_schedules"
android:enabled="true"
android:icon="@drawable/ic_access_time_white_24dp"
android:title="@string/text_schedules"
app:showAsAction="ifRoom" />
<item
android:id="@+id/action_music"
android:enabled="true"
android:icon="@drawable/ic_audiotrack_white_24dp"
android:title="@string/text_music"
app:showAsAction="ifRoom" />
</menu>
处理启用/禁用状态。制作选择器文件。
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item
android:state_checked="true"
android:color="@color/colorPrimary" />
<item
android:state_checked="false"
android:color="@color/grey" />
</selector>
处理点击事件。
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_favorites:
break;
case R.id.action_schedules:
break;
case R.id.action_music:
break;
}
return false;
}
});
编辑:使用 Androidx,您只需要添加以下依赖项。
implementation 'com.google.android.material:material:1.2.0-alpha01'
布局
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout 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:layout_width="match_parent"
android:layout_height="match_parent">
<com.google.android.material.bottomnavigation.BottomNavigationView
android:layout_gravity="bottom"
app:menu="@menu/bottom_navigation_menu"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
</FrameLayout>
如果你想了解更多关于它的方法和它是如何工作的,请阅读这个。
当然它会帮助你。
您应该使用v25 Android 支持库中的 BottomNavigationView。它代表应用程序的标准底部导航栏。
这是一篇关于 Medium 的帖子,其中包含分步指南: https ://medium.com/@hitherejoe/exploring-the-android-design-support-library-bottom-navigation-drawer-548de699e8e0#.9vmiekxze
我最初的答案涉及BottomNavigationView
,但现在有BottomAppBar
. 我在顶部添加了一个带有实现链接的部分。
BottomAppBar
支持浮动操作按钮。
图片来自这里。有关设置. _ _ _BottomAppBar
以下完整示例显示了如何制作类似于问题中图像的底部导航视图。另请参阅文档中的底部导航。
将此行添加到您的应用程序的build.grade文件中,旁边是其他支持库的内容。
implementation 'com.android.support:design:28.0.0'
用当前的版本号替换版本号。
我们添加到布局中的唯一特别的东西是BottomNavigationView
. 要在单击时更改图标和文本的颜色,可以使用 aselector
而不是直接指定颜色。为简单起见,此处省略。
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.BottomNavigationView
android:id="@+id/bottom_navigation"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
app:menu="@menu/bottom_nav_menu"
app:itemBackground="@color/colorPrimary"
app:itemIconTint="@android:color/white"
app:itemTextColor="@android:color/white" />
</RelativeLayout>
请注意,我们过去layout_alignParentBottom
实际上将它放在底部。
上面提到的底部导航视图的 xml bottom_nav_menu
。这就是我们视图中定义每个项目的内容。我们现在就做。您所要做的就是添加一个菜单资源,就像添加操作栏或工具栏一样。
bottom_nav_menu.xml
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<item
android:id="@+id/action_recents"
android:enabled="true"
android:icon="@drawable/ic_action_recents"
android:title="Recents"
app:showAsAction="ifRoom" />
<item
android:id="@+id/action_favorites"
android:enabled="true"
android:icon="@drawable/ic_action_favorites"
android:title="Favorites"
app:showAsAction="ifRoom" />
<item
android:id="@+id/action_nearby"
android:enabled="true"
android:icon="@drawable/ic_action_nearby"
android:title="Nearby"
app:showAsAction="ifRoom" />
</menu>
您需要将适当的图标添加到您的项目中。如果您转到File > New > Image Asset并选择Action Bar and Tab Icons作为图标类型,这并不是很困难。
这里没有什么特别的事情发生。我们只需在 Activity 的onCreate
方法中向底部导航栏添加一个侦听器。
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
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_recents:
Toast.makeText(MainActivity.this, "Recents", Toast.LENGTH_SHORT).show();
break;
case R.id.action_favorites:
Toast.makeText(MainActivity.this, "Favorites", Toast.LENGTH_SHORT).show();
break;
case R.id.action_nearby:
Toast.makeText(MainActivity.this, "Nearby", Toast.LENGTH_SHORT).show();
break;
}
return true;
}
});
}
}
我通过观看以下 YouTube 视频学会了如何做到这一点。电脑声音有点奇怪,但演示很清晰。
您还可以使用带有自定义选项卡视图的选项卡布局来实现此目的。
custom_tab.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="?attr/selectableItemBackground"
android:gravity="center"
android:orientation="vertical"
android:paddingBottom="10dp"
android:paddingTop="8dp">
<ImageView
android:id="@+id/icon"
android:layout_width="24dp"
android:layout_height="24dp"
android:scaleType="centerInside"
android:src="@drawable/ic_recents_selector" />
<TextView
android:id="@+id/title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:ellipsize="end"
android:maxLines="1"
android:textAllCaps="false"
android:textColor="@color/tab_color"
android:textSize="12sp"/>
</LinearLayout>
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<android.support.v4.view.ViewPager
android:id="@+id/view_pager"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1" />
<android.support.design.widget.TabLayout
android:id="@+id/tab_layout"
style="@style/AppTabLayout"
android:layout_width="match_parent"
android:layout_height="56dp"
android:background="?attr/colorPrimary" />
</LinearLayout>
MainActivity.java
public class MainActivity extends AppCompatActivity {
private TabLayout mTabLayout;
private int[] mTabsIcons = {
R.drawable.ic_recents_selector,
R.drawable.ic_favorite_selector,
R.drawable.ic_place_selector};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Setup the viewPager
ViewPager viewPager = (ViewPager) findViewById(R.id.view_pager);
MyPagerAdapter pagerAdapter = new MyPagerAdapter(getSupportFragmentManager());
viewPager.setAdapter(pagerAdapter);
mTabLayout = (TabLayout) findViewById(R.id.tab_layout);
mTabLayout.setupWithViewPager(viewPager);
for (int i = 0; i < mTabLayout.getTabCount(); i++) {
TabLayout.Tab tab = mTabLayout.getTabAt(i);
tab.setCustomView(pagerAdapter.getTabView(i));
}
mTabLayout.getTabAt(0).getCustomView().setSelected(true);
}
private class MyPagerAdapter extends FragmentPagerAdapter {
public final int PAGE_COUNT = 3;
private final String[] mTabsTitle = {"Recents", "Favorites", "Nearby"};
public MyPagerAdapter(FragmentManager fm) {
super(fm);
}
public View getTabView(int position) {
// Given you have a custom layout in `res/layout/custom_tab.xml` with a TextView and ImageView
View view = LayoutInflater.from(MainActivity.this).inflate(R.layout.custom_tab, null);
TextView title = (TextView) view.findViewById(R.id.title);
title.setText(mTabsTitle[position]);
ImageView icon = (ImageView) view.findViewById(R.id.icon);
icon.setImageResource(mTabsIcons[position]);
return view;
}
@Override
public Fragment getItem(int pos) {
switch (pos) {
case 0:
return PageFragment.newInstance(1);
case 1:
return PageFragment.newInstance(2);
case 2:
return PageFragment.newInstance(3);
}
return null;
}
@Override
public int getCount() {
return PAGE_COUNT;
}
@Override
public CharSequence getPageTitle(int position) {
return mTabsTitle[position];
}
}
}
Google 在设计支持库 25.0.0 版本之后推出了 BottomNavigationView。但它有以下限制:
所以你可以用这个第一个版本的 BottomNavigationView 做的最大事情是:(没有任何反射或自己实现 lib)。
所以,如果你想要这些。您可以使用像roughike/BottomBar这样的第三方库,也可以自己实现该库。
正如 Sanf0rd 所提到的,Google 推出了BottomNavigationView作为设计支持库版本 25.0.0 的一部分。他提到的限制大多是正确的,除了您可以更改视图的背景颜色,甚至是文本颜色和图标色调颜色。当您添加超过 4 个项目时,它还有一个动画(遗憾的是它不能手动启用或禁用)。
我用示例和随附的存储库编写了有关它的详细教程,您可以在此处阅读: https ://blog.autsoft.hu/now-you-can-use-the-bottom-navigation-view-in-the-设计支持库/
您必须在您的应用程序级别添加这些build.gradle
:
compile 'com.android.support:appcompat-v7:25.0.0'
compile 'com.android.support:design:25.0.0'
您可以将它包含在您的布局中,如下所示:
<android.support.design.widget.BottomNavigationView
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/bottom_navigation_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:itemBackground="@color/darkGrey"
app:itemIconTint="@color/bottom_navigation_item_background_colors"
app:itemTextColor="@color/bottom_navigation_item_background_colors"
app:menu="@menu/menu_bottom_navigation" />
您可以通过这样的菜单资源指定项目:
<?xml version="1.0" encoding="utf-8"?>
<menu
xmlns:android="http://schemas.android.com/apk/res/android">
<item
android:id="@+id/action_one"
android:icon="@android:drawable/ic_dialog_map"
android:title="One"/>
<item
android:id="@+id/action_two"
android:icon="@android:drawable/ic_dialog_info"
android:title="Two"/>
<item
android:id="@+id/action_three"
android:icon="@android:drawable/ic_dialog_email"
android:title="Three"/>
<item
android:id="@+id/action_four"
android:icon="@android:drawable/ic_popup_reminder"
android:title="Four"/>
</menu>
并且您可以将色调和文本颜色设置为颜色列表,以便突出显示当前选定的项目:
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item
android:color="@color/colorAccent"
android:state_checked="false"/>
<item
android:color="@android:color/white"
android:state_checked="true"/>
</selector>
最后,您可以使用 OnNavigationItemSelectedListener 处理项目的选择:
bottomNavigationView.setOnNavigationItemSelectedListener(new BottomNavigationView.OnNavigationItemSelectedListener() {
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem item) {
Fragment fragment = null;
switch (item.getItemId()) {
case R.id.action_one:
// Switch to page one
break;
case R.id.action_two:
// Switch to page two
break;
case R.id.action_three:
// Switch to page three
break;
}
return true;
}
});
您可以尝试的其他替代库:- https://github.com/Ashok-Varma/BottomNavigation
<com.ashokvarma.bottomnavigation.BottomNavigationBar
android:layout_gravity="bottom"
android:id="@+id/bottom_navigation_bar"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
BottomNavigationBar bottomNavigationBar = (BottomNavigationBar) findViewById(R.id.bottom_navigation_bar);
bottomNavigationBar
.addItem(new BottomNavigationItem(R.drawable.ic_home_white_24dp, "Home"))
.addItem(new BottomNavigationItem(R.drawable.ic_book_white_24dp, "Books"))
.addItem(new BottomNavigationItem(R.drawable.ic_music_note_white_24dp, "Music"))
.addItem(new BottomNavigationItem(R.drawable.ic_tv_white_24dp, "Movies & TV"))
.addItem(new BottomNavigationItem(R.drawable.ic_videogame_asset_white_24dp, "Games"))
.initialise();
我创建了一个使用 gridview 和菜单资源的私有类:
private class BottomBar {
private GridView mGridView;
private Menu mMenu;
private BottomBarAdapter mBottomBarAdapter;
private View.OnClickListener mOnClickListener;
public BottomBar (@IdRes int gridviewId, @MenuRes int menuRes,View.OnClickListener onClickListener) {
this.mGridView = (GridView) findViewById(gridviewId);
this.mMenu = getMenu(menuRes);
this.mOnClickListener = onClickListener;
this.mBottomBarAdapter = new BottomBarAdapter();
this.mGridView.setAdapter(mBottomBarAdapter);
}
private Menu getMenu(@MenuRes int menuId) {
PopupMenu p = new PopupMenu(MainActivity.this,null);
Menu menu = p.getMenu();
getMenuInflater().inflate(menuId,menu);
return menu;
}
public GridView getGridView(){
return mGridView;
}
public void show() {
mGridView.setVisibility(View.VISIBLE);
mGridView.animate().translationY(0);
}
public void hide() {
mGridView.animate().translationY(mGridView.getHeight());
}
private class BottomBarAdapter extends BaseAdapter {
private LayoutInflater mInflater;
public BottomBarAdapter(){
this.mInflater = LayoutInflater.from(MainActivity.this);
}
@Override
public int getCount() {
return mMenu.size();
}
@Override
public Object getItem(int i) {
return mMenu.getItem(i);
}
@Override
public long getItemId(int i) {
return 0;
}
@Override
public View getView(int i, View view, ViewGroup viewGroup) {
MenuItem item = (MenuItem) getItem(i);
if (view==null){
view = mInflater.inflate(R.layout.your_item_layout,null);
view.setId(item.getItemId());
}
view.setOnClickListener(mOnClickListener);
view.findViewById(R.id.bottomnav_icon).setBackground(item.getIcon());
((TextView) view.findViewById(R.id.bottomnav_label)).setText(item.getTitle());
return view;
}
}
your_menu.xml:
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
<item android:id="@+id/item1_id"
android:icon="@drawable/ic_item1"
android:title="@string/title_item1"/>
<item android:id="@+id/item2_id"
android:icon="@drawable/ic_item2"
android:title="@string/title_item2"/>
...
</menu>
和自定义布局项 your_item_layout.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content" android:layout_height="wrap_content"
android:orientation="vertical"
android:layout_margin="16dp">
<ImageButton android:id="@+id/bottomnav_icon"
android:layout_width="24dp"
android:layout_height="24dp"
android:layout_gravity="top|center_horizontal"
android:layout_marginTop="8dp"
android:layout_marginBottom="4dp"/>
<TextView android:id="@+id/bottomnav_label"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|center_horizontal"
android:layout_marginBottom="8dp"
android:layout_marginTop="4dp"
style="@style/mystyle_label" />
</LinearLayout>
在您的主要活动中使用:
BottomBar bottomBar = new BottomBar(R.id.YourGridView,R.menu.your_menu, mOnClickListener);
和
private View.OnClickListener mOnClickListener = new View.OnClickListener() {
@Override
public void onClick(View view) {
switch (view.getId()) {
case R.id.item1_id:
//todo item1
break;
case R.id.item2_id:
//todo item2
break;
...
}
}
}
并在 layout_activity.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
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:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">
...
<FrameLayout android:id="@+id/fragment_container"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="@string/appbar_scrolling_view_behavior"/>
<GridView android:id="@+id/bottomNav"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/your_background_color"
android:verticalSpacing="0dp"
android:horizontalSpacing="0dp"
android:numColumns="4"
android:stretchMode="columnWidth"
app:layout_anchor="@id/fragment_container"
app:layout_anchorGravity="bottom"/>
</android.support.design.widget.CoordinatorLayout>
我认为这也很有用。
片段
public class MainActivity : AppCompatActivity, BottomNavigationBar.Listeners.IOnTabSelectedListener
{
private BottomBar _bottomBar;
protected override void OnCreate(Bundle bundle)
{
base.OnCreate(bundle);
SetContentView(Resource.Layout.MainActivity);
_bottomBar = BottomBar.Attach(this, bundle);
_bottomBar.SetItems(
new BottomBarTab(Resource.Drawable.ic_recents, "Recents"),
new BottomBarTab(Resource.Drawable.ic_favorites, "Favorites"),
new BottomBarTab(Resource.Drawable.ic_nearby, "Nearby")
);
_bottomBar.SetOnItemSelectedListener(this);
_bottomBar.HideShadow();
_bottomBar.UseDarkTheme(true);
_bottomBar.SetTypeFace("Roboto-Regular.ttf");
var badge = _bottomBar.MakeBadgeForTabAt(1, Color.ParseColor("#f02d4c"), 1);
badge.AutoShowAfterUnSelection = true;
}
public void OnItemSelected(int position)
{
}
protected override void OnSaveInstanceState(Bundle outState)
{
base.OnSaveInstanceState(outState);
// Necessary to restore the BottomBar's state, otherwise we would
// lose the current tab on orientation change.
_bottomBar.OnSaveInstanceState(outState);
}
}
链接
https://github.com/pocheshire/BottomNavigationBar
它是为 Xamarin 开发人员移植到 C#的https://github.com/roughike/BottomBar
设计支持库 25 版中新增了官方的BottomNavigationView
https://developer.android.com/reference/android/support/design/widget/BottomNavigationView.html
加入gradle
compile 'com.android.support:design:25.0.0'
XML
<android.support.design.widget.BottomNavigationView
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:design="http://schema.android.com/apk/res/android.support.design"
android:id="@+id/navigation"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
design:menu="@menu/my_navigation_items" />
这个库BottomNavigationViewEx扩展了 Google 的 BottomNavigationView。您可以轻松自定义 Google 的库,使其底部导航栏按您想要的方式显示。您可以禁用移动模式、更改图标和文本的可见性等等。一定要试一试。
我已经提到了这个github 帖子,并且我已经在底部标签栏中设置了页面three layouts
。three fragment
FourButtonsActivity.java:
bottomBar.setFragmentItems(getSupportFragmentManager(), R.id.fragmentContainer,
new BottomBarFragment(LibraryFragment.newInstance(R.layout.library_fragment_layout), R.drawable.ic_update_white_24dp, "Recents"),
new BottomBarFragment(PhotoEffectFragment.newInstance(R.layout.photo_effect_fragment), R.drawable.ic_local_dining_white_24dp, "Food"),
new BottomBarFragment(VideoFragment.newInstance(R.layout.video_layout), R.drawable.ic_favorite_white_24dp, "Favorites")
);
设置徽章计数:
BottomBarBadge unreadMessages = bottomBar.makeBadgeForTabAt(1, "#E91E63", 4);
unreadMessages.show();
unreadMessages.setCount(4);
unreadMessages.setAnimationDuration(200);
unreadMessages.setAutoShowAfterUnSelection(true);
库片段.java:
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class LibraryFragment extends Fragment {
private static final String STARTING_TEXT = "Four Buttons Bottom Navigation";
public LibraryFragment() {
}
public static LibraryFragment newInstance(int resource) {
Bundle args = new Bundle();
args.putInt(STARTING_TEXT, resource);
LibraryFragment sampleFragment = new LibraryFragment();
sampleFragment.setArguments(args);
return sampleFragment;
}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = LayoutInflater.from(getActivity()).inflate(
getArguments().getInt(STARTING_TEXT), null);
return view;
}
<android.support.design.widget.BottomNavigationView
android:id="@+id/navigation"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
android:background="?android:attr/windowBackground"
app:menu="@menu/navigation" />
navigation.xml(内部菜单)
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<item
android:id="@+id/navigation_home"
android:icon="@drawable/ic_home_black_24dp"
android:title="@string/title_home"
app:showAsAction="always|withText"
android:enabled="true"/>
内部onCreate()
方法,
BottomNavigationView navigation = (BottomNavigationView)findViewById(R.id.navigation);
//Dont forgot this line
BottomNavigationViewHelper.disableShiftMode(navigation);
并创建如下类。
public class BottomNavigationViewHelper {
public static void disableShiftMode(BottomNavigationView view) {
BottomNavigationMenuView menuView = (BottomNavigationMenuView) view.getChildAt(0);
try {
Field shiftingMode = menuView.getClass().getDeclaredField("mShiftingMode");
shiftingMode.setAccessible(true);
shiftingMode.setBoolean(menuView, false);
shiftingMode.setAccessible(false);
for (int i = 0; i < menuView.getChildCount(); i++) {
BottomNavigationItemView item = (BottomNavigationItemView) menuView.getChildAt(i);
//noinspection RestrictedApi
item.setShiftingMode(false);
// set once again checked value, so view will be updated
//noinspection RestrictedApi
item.setChecked(item.getItemData().isChecked());
}
} catch (NoSuchFieldException e) {
Log.e("BNVHelper", "Unable to get shift mode field", e);
} catch (IllegalAccessException e) {
Log.e("BNVHelper", "Unable to change value of shift mode", e);
}
}
}
您可以根据上述答案创建布局如果有人想在 kotlin 中使用它:-
private val mOnNavigationItemSelectedListener = BottomNavigationView.OnNavigationItemSelectedListener { item ->
when (item.itemId) {
R.id.images -> {
// do your work....
return@OnNavigationItemSelectedListener true
}
R.id.videos ->
{
// do your work....
return@OnNavigationItemSelectedListener true
}
}
false
}
然后在 oncreate 中,您可以将上述侦听器设置为您的视图
mDataBinding?.navigation?.setOnNavigationItemSelectedListener(mOnNavigationItemSelectedListener)