TabLayout用法，android顶部导航栏，android底部导航栏

转载出处：http://blog.csdn.net/tianyaleixiaowu/article/details/50820257

TabLayout是android.support.design里的一个控件，使用它可以很方便的做出顶部导航和底部导航。类似于这样的，能设置选中时字体的颜色和选中时的图片。





首先我们引入compile 'com.android.support:design:23.1.1'

它的用法是：

第一种比较简单，就是文本和一个指示器。

布局文件是

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<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_width="match_parent"

android:layout_height="match_parent"

xmlns:app="http://schemas.android.com/apk/res-auto"

android:orientation="vertical">

<android.support.design.widget.TabLayout

android:id="@+id/tab"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:background="#32CD32"

app:tabIndicatorColor="#f00"

app:tabSelectedTextColor="#444"

app:tabMode="fixed"

app:tabTextColor="#fff" />

<android.support.v4.view.ViewPager

android:id="@+id/viewpager"

android:layout_width="fill_parent"

android:layout_height="0dp"

android:layout_weight="1" />

</LinearLayout>

顶部是一个TabLayout，可以设置background。app:tabIndicatorColor是设置指示器的背景颜色，app:tabIndicatorHeight设置指示器的高度，app:tabSelectedTextColor是选中时文本的颜色，app:tabTextColor是普通状态的文本颜色，app:tabMode是是否可滑动，有两个fixed和scrollable,fixed是固定的，scrollable是类似于今日头条那种可以滑动的。

java代码

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import android.app.Fragment;

import android.os.Bundle;

import android.support.design.widget.TabLayout;

import android.support.v4.view.ViewPager;

import android.support.v7.app.AppCompatActivity;

import com.tianyalei.wolf.mddesignlib.view.titlelayout.TitleFragmentPagerAdapter;

import com.tianyalei.wolf.sample.R;

import java.util.ArrayList;

import java.util.List;

import butterknife.Bind;

import butterknife.ButterKnife;

public class TabActivity extends AppCompatActivity {

@Bind(R.id.tab)

TabLayout tabLayout;

@Bind(R.id.viewpager)

ViewPager viewpager;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_tab);

ButterKnife.bind(this);

// tabLayout.setTabTextColors(Color.WHITE, Color.GRAY);//设置文本在选中和为选中时候的颜色

// tabLayout.setSelectedTabIndicatorColor(Color.WHITE);//设置选中时的指示器的颜色

// tabLayout.setTabMode(TabLayout.MODE_SCROLLABLE);//可滑动，默认是FIXED

List<Fragment> fragments = new ArrayList<>();

fragments.add(new BlankFragment());

fragments.add(new BlankFragment());

fragments.add(new BlankFragment());

TitleFragmentPagerAdapter adapter = new TitleFragmentPagerAdapter(getFragmentManager(), fragments, new String[]{"第一栏", "第二栏", "第三栏"});

viewpager.setAdapter(adapter);

tabLayout.setupWithViewPager(viewpager);

}

}

TitleFragmentPagerAdapter是viewpager的适配器，

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/*

* Copyright (C) 2012 www.amsoft.cn

*

* Licensed under the Apache License, Version 2.0 (the "License");

* you may not use this file except in compliance with the License.

* You may obtain a copy of the License at

*

* http://www.apache.org/licenses/LICENSE-2.0
*

* Unless required by applicable law or agreed to in writing, software

* distributed under the License is distributed on an "AS IS" BASIS,

* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

* See the License for the specific language governing permissions and

* limitations under the License.

*/

package com.tianyalei.wolf.mddesignlib.view.titlelayout;

import android.app.Fragment;

import android.app.FragmentManager;

import android.support.v13.app.FragmentPagerAdapter;

import java.util.ArrayList;

import java.util.List;

/**

* © 2012 amsoft.cn 名称：TitleFragmentPagerAdapter.java 描述：一个通用的Fragment适配器

*

* @author wolf

* @version v1.0

* @date：2016-3-7 上午10:57:53

*/

public class TitleFragmentPagerAdapter extends FragmentPagerAdapter {

/**

* The m fragment list.

*/

private List<Fragment> mFragmentList = null;

private String[] titles;

/**

* Instantiates a new ab fragment pager adapter.

*

* @param mFragmentManager the m fragment manager

* @param fragmentList the fragment list

*/

public TitleFragmentPagerAdapter(FragmentManager mFragmentManager,

ArrayList<Fragment> fragmentList) {

super(mFragmentManager);

mFragmentList = fragmentList;

}

/**

* titles是给TabLayout设置title用的

*

* @param mFragmentManager

* @param fragmentList

* @param titles

*/

public TitleFragmentPagerAdapter(FragmentManager mFragmentManager,

List<Fragment> fragmentList, String[] titles) {

super(mFragmentManager);

mFragmentList = fragmentList;

this.titles = titles;

}

/**

* 描述：获取数量.

*

* @return the count

* @see android.support.v4.view.PagerAdapter#getCount()

*/

@Override

public int getCount() {

return mFragmentList.size();

}

/**

* 描述：获取索引位置的Fragment.

*

* @param position the position

* @return the item

* @see android.support.v4.app.FragmentPagerAdapter#getItem(int)

*/

@Override

public Fragment getItem(int position) {

Fragment fragment = null;

if (position < mFragmentList.size()) {

fragment = mFragmentList.get(position);

} else {

fragment = mFragmentList.get(0);

}

return fragment;

}

@Override

public CharSequence getPageTitle(int position) {

if (titles != null && titles.length > 0)

return titles[position];

return null;

}

}

需要注意的是getPageTitle方法，返回viewpager对应的title。

以上就是TabLayout和viewpager结合的简单例子。

下面说第二种带图片的底部导航，

其实也很简单，就是把TabLayout放到底部，上面是viewpager，然后给text设置个图片就行了。布局如下

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<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_width="match_parent"

android:layout_height="match_parent"

xmlns:app="http://schemas.android.com/apk/res-auto"

android:orientation="vertical">

<android.support.v4.view.ViewPager

android:id="@+id/viewpager"

android:layout_width="fill_parent"

android:layout_height="0dp"

android:layout_weight="1" />

<android.support.design.widget.TabLayout

android:id="@+id/tab"

android:layout_width="match_parent"

android:layout_height="wrap_content"

app:tabBackground="@drawable/selector_bg"

style="@style/MyCustomTabLayout"/>

</LinearLayout>

style里面设置了一些属性

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<style name="MyCustomTabLayout" parent="Widget.Design.TabLayout">

<item name="tabIndicatorColor">?attr/colorAccent</item>

<item name="tabIndicatorHeight">0dp</item>

<item name="tabPaddingStart">12dp</item>

<item name="tabTextColor">#aaa</item>

<item name="tabPaddingEnd">12dp</item>

<item name="tabSelectedTextColor">#f00</item>

</style>

tabIndicatorHeight是设置导航那个指示器高度为0，因为不需要那个指示器了。然后app:tabBackground这个属性待会再说。

代码如下

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package com.tianyalei.wolf.sample.activity;

import android.annotation.TargetApi;

import android.app.Fragment;

import android.graphics.drawable.Drawable;

import android.os.Build;

import android.os.Bundle;

import android.support.design.widget.TabLayout;

import android.support.v4.view.ViewPager;

import android.support.v7.app.AppCompatActivity;

import com.tianyalei.wolf.mddesignlib.view.titlelayout.TitleFragmentPagerAdapter;

import com.tianyalei.wolf.sample.R;

import java.util.ArrayList;

import java.util.List;

import butterknife.Bind;

import butterknife.ButterKnife;

public class TabBottomActivity extends AppCompatActivity {

@Bind(R.id.tab)

TabLayout tabLayout;

@Bind(R.id.viewpager)

ViewPager viewpager;

@TargetApi(Build.VERSION_CODES.JELLY_BEAN)

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_bottom_tab);

ButterKnife.bind(this);

List<Fragment> fragments = new ArrayList<>();

fragments.add(new BlankFragment());

fragments.add(new BlankFragment());

fragments.add(new BlankFragment());

fragments.add(new BlankFragment());

TitleFragmentPagerAdapter adapter = new TitleFragmentPagerAdapter(getFragmentManager(), fragments, new String[]{"首页", "流量", "社区", "关于"});

viewpager.setAdapter(adapter);

tabLayout.setupWithViewPager(viewpager);

for (int i = 0; i < tabLayout.getTabCount(); i++) {

TabLayout.Tab tab = tabLayout.getTabAt(i);

Drawable d = null;

switch (i) {

case 0:

d = getResources().getDrawable(R.drawable.selector_home);

break;

case 1:

d = getResources().getDrawable(R.drawable.selector_mall);

break;

case 2:

d = getResources().getDrawable(R.drawable.selector_socially);

break;

case 3:

d = getResources().getDrawable(R.drawable.selector_more);

break;

}

tab.setIcon(d);

}

// viewpager.setCurrentItem(2);

}

}

前面的部分没什么好说的。下面的那块是设置图片的，就是在selected的时候把图片换成选中态的图片。遍历tab，给tab设置icon，icon就是selector。

R.drawable.selector_home

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<?xml version="1.0" encoding="utf-8"?>

<selector xmlns:android = "http://schemas.android.com/apk/res/android">

<item android:drawable = "@drawable/nav_home_pre" android:state_selected = "true" />

<item android:drawable = "@drawable/nav_home" android:state_selected = "false" />

</selector>

OK，以上做完就可以了，带图片的底部导航栏就做好了。

下面说一下app:tabBackground，这个是设置单项的背景颜色的，见下图


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就是如果你需要给单项选中时设置个背景，那就用app:tabBackground，也写一个颜色的selector就行了。不需要改变背景的话就不用设置这个属性了。

以上的代码可以从oschina的git托管http://git.oschina.net/tianyalei/MDDesignLib获取，TabLayout相关的在Sample的TabActivity那里。