前言：既然Tablayout可以做成選項卡的導航欄，也可以做成底部導航欄的樣子，其實也就是去掉底部的indicator，把TabLayout佈局放在下面！

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效果圖：

底部文字圖片切換的時候沒有改變，需要的可以自己新增！

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來看程式碼：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="com.fly.lsn12_tablayout_bottomnavigationbar.MainActivity">

    <android.support.v4.view.ViewPager
        android:id="@+id/vp"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1" />

    <android.support.design.widget.TabLayout
        android:id="@+id/tl"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:tabGravity="fill"
        app:tabIndicatorHeight="0dp"
        app:tabMode="fixed"
        app:tabSelectedTextColor="?attr/colorPrimaryDark"
        app:tabTextColor="?attr/colorPrimary" />
</LinearLayout>
 

MainActivity完整程式碼：

import android.os.Bundle;
import android.support.design.widget.TabLayout;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

    private ViewPager viewPager;
    private TabLayout tabLayout;
    String title[] = {
            "標題1", "標題2", "標題3",
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        viewPager = (ViewPager) findViewById(R.id.vp);
        tabLayout = (TabLayout) findViewById(R.id.tl);

        MyPagerAdapter adapter = new MyPagerAdapter(getSupportFragmentManager());

        tabLayout.setupWithViewPager(viewPager);

        for (int i = 0; i < tabLayout.getTabCount(); i++) {
            TabLayout.Tab tab = tabLayout.getTabAt(i);
            View view = View.inflate(this, R.layout.bottom_navigation, null);
            TextView tv = (TextView) view.findViewById(R.id.tv);
            tv.setText(title[i]);
            tab.setCustomView(view);
        }
    }

    class MyPagerAdapter extends FragmentPagerAdapter {

        public MyPagerAdapter(FragmentManager fm) {
            super(fm);
        }

        @Override
        public CharSequence getPageTitle(int position) {
            return title[position];
        }

        @Override
        public Fragment getItem(int position) {
            Fragment f = new MyFragment();
            Bundle bundle = new Bundle();
            bundle.putString("title", title[position]);
            f.setArguments(bundle);
            return f;
        }

        @Override
        public int getCount() {
            return title.length;
        }
    }
}
 

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;

/**
 * Created by Fly on 2017/5/8.
 */

public class MyFragment extends Fragment {
    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        Bundle bundle = getArguments();
        String title = bundle.getString("title");
        TextView tv = new TextView(getContext());
        tv.setText(title);
        return tv;
    }
}
 

<?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="wrap_content"
    android:gravity="center"
    android:orientation="vertical">

    <ImageView
        android:layout_width="30dp"
        android:layout_height="30dp"
        android:src="@mipmap/ic_launcher" />

    <TextView
        android:id="@+id/tv"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="haha" />
</LinearLayout>

-------------------深夜擼程式碼很辛苦，希望大家多多支援----------------------------------