Android中Design support library库的TabLayout控件的简单使用

使用Design support library库的TabLayout。ViewPager+Fragment+TabLayout一起使用，如下图：

需要在Module里面的build.gradle中加入

compile 'com.android.support:design:26.+'

1、先看下XML文件——activity_main2.xml

<?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:orientation="vertical"
    android:layout_height="match_parent"
    tools:context="com.example.tablayoutpractice.practice.Main2Activity">

    <android.support.design.widget.TabLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/id_tablayout">

    </android.support.design.widget.TabLayout>

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

    </android.support.v4.view.ViewPager>

</LinearLayout>

2、然后Activity文件——Main2Activity.java

package com.example.tablayoutpractice.practice;

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

import com.example.tablayoutpractice.R;
import com.example.tablayoutpractice.practice.fragment.FragmentOne;
import com.example.tablayoutpractice.practice.fragment.FragmentThree;
import com.example.tablayoutpractice.practice.fragment.FragmentTwo;

import java.util.ArrayList;
import java.util.List;

public class Main2Activity extends FragmentActivity {

    private ViewPager mViewPager;

    private TabLayout mTabLayout;

    private SimpleFragmentAdapter mSimpleFragmentAdapter;

    private List<Fragment> list;

    private List<Bean> tabTitle;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);

        initViews();
        initDatas();

    }

    private void initDatas() {

        list.add(new FragmentOne());
        list.add(new FragmentTwo());
        list.add(new FragmentThree());

        tabTitle.add(new Bean("fighting", R.drawable.b));
        tabTitle.add(new Bean("missyou", R.drawable.c));
        tabTitle.add(new Bean("sunshine", R.drawable.e));

        mSimpleFragmentAdapter = new
                SimpleFragmentAdapter(getSupportFragmentManager(), this, list, tabTitle);
        mViewPager.setAdapter(mSimpleFragmentAdapter);
        /**
         * 设置TabLayout的模式
         * TabLayout具有两个模式
         *  TabLayout.MODE_FIXED        这个也是默认的模式，tab平分屏幕宽度
         *  TabLayout.MODE_SCROLLABLE   意思为可滚动的，每个tab具有固定的宽度，
         *                          当屏幕容不下时可以左右滑动选择页面
         **/
        mTabLayout.setTabMode(TabLayout.MODE_FIXED);
        mTabLayout.setupWithViewPager(mViewPager);
        for (int i = 0; i < mTabLayout.getTabCount(); i++) {
            TabLayout.Tab tab = mTabLayout.getTabAt(i);
            tab.setCustomView(mSimpleFragmentAdapter.getTabView(i));
        }

    }

    private void initViews() {
        list = new ArrayList<Fragment>();
        tabTitle = new ArrayList<Bean>();

        mViewPager = (ViewPager) findViewById(R.id.id_viewpager);
        mTabLayout = (TabLayout) findViewById(R.id.id_tablayout);
    }

}

需要传入ViewPager适配器中的数据的Bean对象

3、Bean.java

package com.example.tablayoutpractice.practice;

/**
 * Created by xiaobaiyang on 2018/4/12.
 */

public class Bean {

    private String title;

    private int icon;

    public Bean(String title, int icon) {
        this.title = title;
        this.icon = icon;
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public int getIcon() {
        return icon;
    }

    public void setIcon(int icon) {
        this.icon = icon;
    }

}

4、以及ViewPager的适配器

SimpleFragmentAdapter.java

package com.example.tablayoutpractice.practice;

import android.content.Context;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.ImageView;
import android.widget.TextView;

import com.example.tablayoutpractice.R;

import java.util.List;

/**
 * Created by xiaobaiyang on 2018/4/12.
 */

public class SimpleFragmentAdapter extends FragmentPagerAdapter {

    private Context context;

    private List<Fragment> fragments;

    private List<Bean> beanList;

    public SimpleFragmentAdapter(FragmentManager fm,
                                 Context context, List<Fragment> fragments, List<Bean> beanList) {
        super(fm);
        this.context = context;
        this.fragments = fragments;
        this.beanList = beanList;
    }

    @Override
    public Fragment getItem(int position) {
        return fragments.get(position);
    }

    @Override
    public int getCount() {
        return fragments.size();
    }

    public  View getTabView(int position) {
        View view = LayoutInflater.from(context).inflate(R.layout.tab_item, null);
        TextView textView = (TextView) view.findViewById(R.id.textView);
        ImageView imageView = (ImageView) view.findViewById(R.id.imageView);
        Bean bean = beanList.get(position);
        textView.setText(bean.getTitle());
        imageView.setImageResource(bean.getIcon());
        return view;
    }

}

5、ViewPager的页卡项——FragmentOne

因为其他两个碎片和FragmentOne大同小异，所以只把FragmentOne贴出

FragmentOne.java

package com.example.tablayoutpractice.practice.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 com.example.tablayoutpractice.R;

/**
 * Created by xiaobaiyang on 2018/4/12.
 */

public class FragmentOne extends Fragment {

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater,
                             @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        return inflater.inflate(R.layout.fragment_one, container, false);
    }

}

fragment_one.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">

    <ImageView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:src="@drawable/image_one"
        android:scaleType="centerCrop"/>

</LinearLayout>

运行效果图：

Android中Design support library库的TabLayout控件的简单使用

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