TabLayout滑动框

版权声明：李帅哲专属 https://blog.csdn.net/weixin_43584282/article/details/84258874

加入依赖

implementation 'com.android.support:design:28.0.0'

MainActivity

package com.example.lianxi.activity;

import android.support.design.widget.TabLayout;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;

import com.example.lianxi.R;
import com.example.lianxi.adapter.View_Pager_adapter;

public class MainActivity extends AppCompatActivity {

    private TabLayout tabLayout;
    private ViewPager viewPager;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate( savedInstanceState );
        setContentView( R.layout.activity_main );

        tabLayout = findViewById( R.id.tab_layout );
        viewPager = findViewById( R.id.view_pager );

        viewPager.setAdapter( new View_Pager_adapter(getSupportFragmentManager()) );
        tabLayout.setupWithViewPager( viewPager );

    }
}

适配器

package com.example.lianxi.adapter;

import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;

import com.example.lianxi.fragment.oneFragment;
import com.example.lianxi.fragment.towFragment;

public class View_Pager_adapter extends FragmentPagerAdapter {

    private String[] strings = new String[]{"文章","发现","主题","站点","我的"};

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

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

    @Override
    public Fragment getItem(int i) {
        switch (i){
            case 0:
                return  new oneFragment();
            default:
                return  new towFragment();
        }
    }

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

//布局

<?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:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".activity.MainActivity"
    android:orientation="vertical">

    <android.support.v4.view.ViewPager
        android:id="@+id/view_pager"
        android:layout_weight="9"
        android:layout_width="match_parent"
        android:background="#ccc"
        android:layout_height="wrap_content" />

    <android.support.design.widget.TabLayout
        android:id="@+id/tab_layout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="#dad"
        android:layout_weight="1"
        app:tabMode="scrollable" />

</LinearLayout>