手把手教你TabLayout、ViewPager、Fragment实现顶部导航

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

<android.support.design.widget.TabLayout
android:id="@+id/tabs"
app:tabIndicatorColor="@color/colorAccent"
app:tabSelectedTextColor="@color/colorAccent"
app:tabTextColor="@color/colorPrimaryDark"
app:tabMode="fixed"
android:layout_width="match_parent"
android:layout_height="wrap_content"></android.support.design.widget.TabLayout>

<android.support.v4.view.ViewPager
android:id="@+id/viewPager"
android:layout_width="match_parent"
android:layout_height="wrap_content"></android.support.v4.view.ViewPager>

</LinearLayout>

Fragment的布局文件，3个一样的：layout1.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:src="@mipmap/ic_launcher"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>

<TextView
android:text="this is tab1111"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>

</LinearLayout>

package com.androidtalent.viewpagedemotwo;


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;

/**
* Created by androidtalent on 2016/8/10.
*/
public class Tab1 extends Fragment {

@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {

View view = inflater.inflate(R.layout.layout1, null);

return view;
}
}

MainActivity.java

package com.androidtalent.viewpagedemotwo;


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

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

public class MainActivity extends AppCompatActivity {

private TabLayout tabs;
private ViewPager viewPager;
private List<String> mTitle = new ArrayList<String>();
private List<Fragment> mFragment = new ArrayList<Fragment>();

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

MyAdapter adapter = new MyAdapter(getSupportFragmentManager(), mTitle, mFragment);
viewPager.setAdapter(adapter);
//为TabLayout设置ViewPager
tabs.setupWithViewPager(viewPager);
//使用ViewPager的适配器
tabs.setTabsFromPagerAdapter(adapter);
}

//初始化V
private void initView() {

tabs = (TabLayout) findViewById(R.id.tabs);
viewPager = (ViewPager) findViewById(R.id.viewPager);
mTitle.add("tab1");
mTitle.add("tab2");
mTitle.add("tab3");

mFragment.add(new Tab1());
mFragment.add(new Tab2());
mFragment.add(new Tab3());

}
}

package com.androidtalent.viewpagedemotwo;

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

import java.util.List;

public class MyAdapter extends FragmentPagerAdapter {

private List<String> title;
private List<Fragment> views;

public MyAdapter(FragmentManager fm, List<String> title, List<Fragment> views) {
super(fm);
this.title = title;
this.views = views;
}

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

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

//配置标题的方法
@Override
public CharSequence getPageTitle(int position) {
return title.get(position);
}
}