先来张效果图
接下来是实现过程
1.加入依赖
compile 'com.ashokvarma.android:bottom-navigation-bar:1.3.0'
2.xml布局
fragment.xml的布局
<?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:gravity="center"
android:orientation="vertical"> <TextView
android:id="@+id/tv_fragment_text"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_horizontal"
android:text="@string/app_name"
android:textColor="@color/colorAccent"
android:textSize="24sp"/>
</LinearLayout>
activity_main.xml的布局
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="cct.buttomnavigationbar.MainActivity">
<LinearLayout
android:id="@+id/ll_content"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:text="Hello World!">
</LinearLayout>
<com.ashokvarma.bottomnavigation.BottomNavigationBar
android:id="@+id/bottom_navigation_bar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true">
</com.ashokvarma.bottomnavigation.BottomNavigationBar>
</RelativeLayout>
colors.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<color name="colorPrimary">#3F51B5</color>
<color name="colorPrimaryDark">#303F9F</color>
<color name="colorAccent">#FF4081</color>
<color name="green">#79E65D</color>
<color name="orange">#F8A52A</color>
<color name="pink">#FF77FF</color>
<color name="yellow">#FFFF44</color>
<color name="light">#BBFFF1</color>
</resources>
strings.xml
<resources>
<string name="app_name">BottomNavigationBar</string>
<string name="tab_one">Fish</string>
<string name="tab_two">Fly</string>
<string name="tab_three">Bird</string>
<string name="tab_four">Coffee</string>
</resources>
2.Java代码
BaseFragment类
package cct.buttomnavigationbar.fragment;
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;
import android.widget.TextView;
import cct.buttomnavigationbar.R;
public class BaseFragment extends Fragment {
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment,container,false);
TextView mFragmentText = (TextView) view.findViewById(R.id.tv_fragment_text);
Bundle bundle = getArguments();
String args = bundle.getString(Constants.KEY_ARGS);
mFragmentText.setText(args);
return view;
}
}
Constants类
package cct.buttomnavigationbar.fragment;
public class Constants {
public static final String KEY_ARGS = "args";
}
Fragment1类， Fragment2，Fragment3,Fragment4与之一样，就不贴了
package cct.buttomnavigationbar.fragment;
import android.os.Bundle;
public class FragmentOne extends BaseFragment {
public static FragmentOne newInstance(String s){
Bundle bundle = new Bundle();
bundle.putString(Constants.KEY_ARGS,s);
FragmentOne fragment = new FragmentOne();
fragment.setArguments(bundle);
return fragment;
}
}
MainActivity类
package cct.buttomnavigationbar;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import com.ashokvarma.bottomnavigation.BadgeItem;
import com.ashokvarma.bottomnavigation.BottomNavigationBar;
import com.ashokvarma.bottomnavigation.BottomNavigationItem;
import cct.buttomnavigationbar.fragment.FragmentFour;
import cct.buttomnavigationbar.fragment.FragmentOne;
import cct.buttomnavigationbar.fragment.FragmentThree;
import cct.buttomnavigationbar.fragment.FragmentTwo; public class MainActivity extends AppCompatActivity {
private BottomNavigationBar bottomNavigationBar;
private FragmentOne mFragmentOne;
private FragmentTwo mFragmentTwo;
private FragmentThree mFragmentThree;
private FragmentFour mFragmentFour;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
BadgeItem badgeItem=new BadgeItem();
badgeItem.setHideOnSelect(false)
.setText("10").setBackgroundColor(R.color.light)
.setBorderWidth(0);
bottomNavigationBar= (BottomNavigationBar) findViewById(R.id.bottom_navigation_bar);
bottomNavigationBar.addItem(new BottomNavigationItem(R.drawable.icon_one,R.string.tab_one).setActiveColorResource(R.color.green).setBadgeItem(badgeItem))
.addItem(new BottomNavigationItem(R.drawable.icon_two, R.string.tab_two).setActiveColorResource(R.color.orange))
.addItem(new BottomNavigationItem(R.drawable.icon_three, R.string.tab_three).setActiveColorResource(R.color.pink))
.addItem(new BottomNavigationItem(R.drawable.icon_four, R.string.tab_four).setActiveColor(R.color.yellow))//依次添加item,分别icon和名称
.setFirstSelectedPosition(0)//设置默认选择item
.initialise();//初始化
bottomNavigationBar.setTabSelectedListener(new BottomNavigationBar.OnTabSelectedListener() {
@Override
public void onTabSelected(int position) {
android.support.v4.app.FragmentTransaction transaction=getSupportFragmentManager().beginTransaction();
switch(position)
{
case 0:
{
if(mFragmentOne==null)
{
mFragmentOne=FragmentOne.newInstance("First Fragment");
}
transaction.replace(R.id.ll_content, mFragmentOne);
break;
}
case 1:
{
if(mFragmentTwo==null)
{
mFragmentTwo=FragmentTwo.newInstance("Second Fragment");
}
transaction.replace(R.id.ll_content,mFragmentTwo);
break;
}
case 2:
{
if(mFragmentThree==null)
{
mFragmentThree=FragmentThree.newInstance("ThirdFragment");
}
transaction.replace(R.id.ll_content,mFragmentThree);
break;
}
case 3:
{
if(mFragmentFour==null)
{
mFragmentFour=FragmentFour.newInstance("Forth Fragment");
}
transaction.replace(R.id.ll_content,mFragmentFour);
break;
}
default:
if(mFragmentOne==null)
{
mFragmentOne=FragmentOne.newInstance("First Fragment");
}
transaction.replace(R.id.ll_content,mFragmentOne);
break; }
transaction.commit();
}
@Override
public void onTabUnselected(int position) { }
@Override
public void onTabReselected(int position) { }
});
}
}