Android开发中使用顶部 & 底部Tab导航栏的频次非常高,主要的实现手段有以下:
在上一篇我介绍了如何使用(Fragment+FragmentTabHost++ViewPager) 实现底部菜单栏,详情请看
今天我手把手教大家如何使用TabLayout+ViewPager+Fragment的组合来实现顶部和底部Tab导航栏,
具体使用请参考我写的另外一篇文章:Android开发:ViewPage的介绍
具体使用请参考我写的另外一篇文章Android开发:Fragment介绍&使用方法解析
利用(TabLayout+ViewPager+Fragment)实现顶部&底部Tab导航栏的步骤一共有6个:
接下来大家和我一步步去实现吧!!
强烈建议大家先去Carson_Ho的Github:Top&Bottom_tabbar去下载完整Demo,这样看效果会更好哦!
步骤1:在Gradle中添加依赖
//TabLayout
compile 'com.android.support:support-v4:23.4.0'
compile 'com.android.support:design:23.4.0'
//ViewPage
android.support.v4.view.ViewPager
步骤2:创建需要的Fragment布局文件(需要多少个Tab选项,就建多少个Fragment,这里以4个举例) fragment1.xml(一共4个,这里只写出一个)
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="Fragment1"/>
</RelativeLayout>
步骤3:创建Fragment对应的Activity类 Fragment1(一共4个,这里只写出一个)
package com.example.carson_ho.toptabbar;
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 Carson_Ho on 16/7/22.
*/
public class Fragment1 extends Fragment {
@Nullable
@Override
public View onCreateView(LayoutInflater inflater,
@Nullable ViewGroup container,
@Nullable Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment1, container, false);
}
}
步骤4:定义适配器Adapter类 这里的适配的作用是将Fragment与ViewPager进行适配 MyFragmentPagerAdapter.java
package com.example.carson_ho.toptabbar;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
/**
* Created by Carson_Ho on 16/7/22.
*/
public class MyFragmentPagerAdapter extends FragmentPagerAdapter {
private String[] mTitles = new String[]{"首页", "发现", "进货单","我的"};
public MyFragmentPagerAdapter(FragmentManager fm) {
super(fm);
}
@Override
public Fragment getItem(int position) {
if (position == 1) {
return new Fragment2();
} else if (position == 2) {
return new Fragment3();
}else if (position==3){
return new Fragment4();
}
return new Fragment1();
}
@Override
public int getCount() {
return mTitles.length;
}
//ViewPager与TabLayout绑定后,这里获取到PageTitle就是Tab的Text
@Override
public CharSequence getPageTitle(int position) {
return mTitles[position];
}
}
步骤5:定义主布局activity_main.xml activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="vertical"
tools:context=".MainActivity">
<android.support.design.widget.TabLayout
android:id="@+id/tabLayout"
android:layout_width="match_parent"
android:layout_height="100p"
//导航栏背景颜色
android:background="#ffff00"
//指示器颜色
app:tabIndicatorColor="#66ff33"
//指示器高度
app:tabIndicatorHeight="20p"
//普通状态下文字的颜色
app:tabTextColor="@color/colorPrimary"
//选中时文字的颜色
app:tabSelectedTextColor="#CC33FF"
//是否可滑动:fixed:固定;scrollable:可滑动
app:tabMode="fixed"
//设置选项卡的背景:此处要写一个selector)
app:tabBackground="@drawable/selected"
//设置字体大小:此处要写一个style) app:tabTextAppearance="@style/MyTabLayoutTextAppearance"/>
<android.support.v4.view.ViewPager
android:id="@+id/viewPager"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"/>
</LinearLayout>
selected.xml
<selector xmlns:android="http://schemas.android.com/apk/res/android"> <item android:state_selected="true" android:drawable="@color/colorPrimary"/> <item android:drawable="@color/c1olorAccent"/></selector>
style.xml
<style name="MyTabLayoutTextAppearance" parent="TextAppearance.AppCompat.Widget.ActionBar.Title"> <item name="android:textSize">5sp</item> <item name="android:textColor">@color/c1olorAAA</item></style>
步骤6:定义MainActivity MainActivity.Java
package com.example.carson_ho.toptabbar;
import android.os.Bundle;
import android.support.design.widget.TabLayout;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
public class MainActivity extends AppCompatActivity {
private TabLayout mTabLayout;
private ViewPager mViewPager;
private MyFragmentPagerAdapter myFragmentPagerAdapter;
private TabLayout.Tab one;
private TabLayout.Tab two;
private TabLayout.Tab three;
private TabLayout.Tab four;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getSupportActionBar().hide();//隐藏掉整个ActionBar
setContentView(R.layout.activity_main);
//初始化视图
initViews();
}
private void initViews() {
//使用适配器将ViewPager与Fragment绑定在一起
mViewPager= (ViewPager) findViewById(R.id.viewPager);
myFragmentPagerAdapter = new MyFragmentPagerAdapter(getSupportFragmentManager());
mViewPager.setAdapter(myFragmentPagerAdapter);
//将TabLayout与ViewPager绑定在一起
mTabLayout = (TabLayout) findViewById(R.id.tabLayout);
mTabLayout.setupWithViewPager(mViewPager);
//指定Tab的位置
one = mTabLayout.getTabAt(0);
two = mTabLayout.getTabAt(1);
three = mTabLayout.getTabAt(2);
four = mTabLayout.getTabAt(3);
//设置Tab的图标,假如不需要则把下面的代码删去
one.setIcon(R.mipmap.ic_launcher);
two.setIcon(R.mipmap.ic_launcher);
three.setIcon(R.mipmap.ic_launcher);
four.setIcon(R.mipmap.ic_launcher);
}
}
实现了顶部Tab导航栏,该如何实现底部Tab导航栏实现呢?很简单!只需要在上面步骤5:定义主布局activity_main.xml中将TabLayout和ViewPager的位置交换就可以了!如下图: 步骤5:定义主布局activity_main.xml activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="vertical"
tools:context=".MainActivity">
<android.support.v4.view.ViewPager
android:id="@+id/viewPager"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"/>
<android.support.design.widget.TabLayout
android:id="@+id/tabLayout"
android:layout_width="match_parent"
android:layout_height="100p"
//导航栏背景颜色
android:background="#ffff00"
//指示器颜色
app:tabIndicatorColor="#66ff33"
//指示器高度
app:tabIndicatorHeight="20p"
//普通状态下文字的颜色
app:tabTextColor="@color/colorPrimary"
//选中时文字的颜色
app:tabSelectedTextColor="#CC33FF"
//是否可滑动:fixed:固定;scrollable:可滑动
app:tabMode="fixed"
//设置选项卡的背景:此处要写一个selector)
app:tabBackground="@drawable/selected"/>
</LinearLayout>
Carson_Ho的Github:Top&Bottom_tabbar
本文对利用Google最新的控件库TabLayout实现顶部&底部Tab导航栏进行了全面的讲解,接下来我会继续介绍Android开发中的相关知识,有兴趣可以继续关注Carson_Ho的安卓开发笔记