仿网易选项卡的实现

来源：互联网发布：淘宝卖家怎么用手机编辑：程序博客网时间：2024/05/21 16:17

Google在2015的IO大会上，给我们带来了更加详细的Material Design设计规范，同时，也给我们带来了全新的Android Design Support Library，在这个support库里面，Google给我们提供了更加规范的MD设计风格的控件。最重要的是，Android Design Support Library的兼容性更广，直接可以向下兼容到Android 2.2。

app/build.gradle

apply plugin: 'com.android.application'android {    compileSdkVersion 23    buildToolsVersion "23.0.2"    defaultConfig {        applicationId "com.hd.tabviewtest"        minSdkVersion 15        targetSdkVersion 23        versionCode 1        versionName "1.0"    }    buildTypes {        release {            minifyEnabled false            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'        }    }}dependencies {    compile fileTree(include: ['*.jar'], dir: 'libs')    testCompile 'junit:junit:4.12'    compile 'com.android.support:appcompat-v7:23.2.0'    compile 'com.android.support:support-annotations:23.2.0'    compile 'com.android.support:design:23.2.0'}

需要添加compile ‘com.android.support:design:23.2.0’包。

layout/activity_main.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:layout_height="match_parent"    android:orientation="vertical"    tools:context="com.hd.tabviewtest.MainActivity">    <android.support.design.widget.AppBarLayout        android:id="@+id/appbar"        android:layout_width="match_parent"        android:layout_height="wrap_content">        <android.support.v7.widget.Toolbar            android:id="@+id/toolbar"            android:layout_width="match_parent"            android:layout_height="wrap_content"            app:layout_scrollFlags="scroll|enterAlways"            app:popupTheme="@style/ThemeOverlay.AppCompat.Light"/>        <android.support.design.widget.TabLayout            android:id="@+id/tabs"            android:layout_width="match_parent"            android:layout_height="wrap_content"            app:tabIndicatorColor="#ADBE107E"            app:tabMode="scrollable"></android.support.design.widget.TabLayout>        <android.support.v4.view.ViewPager            android:id="@+id/viewpager"            android:layout_width="match_parent"            android:layout_height="match_parent"            android:background="@color/white"            ></android.support.v4.view.ViewPager>    </android.support.design.widget.AppBarLayout></LinearLayout>

这里需要注意控件所属的包别用错了，android.widget.TabLayout也有一个TabLayout，我们需要使用design.support包中的控件。

com.hd.tabviewtest.MainActivity

package com.hd.tabviewtest;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 android.os.Bundle;import android.support.v7.widget.Toolbar;import java.util.ArrayList;import java.util.List;public class MainActivity extends AppCompatActivity {    private Toolbar toolbar;    private ViewPager viewPager;    private TabLayout mTablayout;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        toolbar = (Toolbar) findViewById(R.id.toolbar);        setSupportActionBar(toolbar);        viewPager = (ViewPager) findViewById(R.id.viewpager);        initViewger();    }    private void initViewger() {        mTablayout = (android.support.design.widget.TabLayout) findViewById(R.id.tabs);        List<String> titles = new ArrayList<>();        titles.add("精选");        titles.add("体育");        titles.add("巴萨");        titles.add("明星");        titles.add("视频");        titles.add("健康");        titles.add("励志");        titles.add("图文");        titles.add("本地");        titles.add("动漫");        titles.add("搞笑");        titles.add("精选");        for (int i=0;i<titles.size();i++) {            mTablayout.addTab(mTablayout.newTab().setText(titles.get(i)));        }        List<Fragment> fragmentList = new ArrayList<>();        for (int i =0;i<titles.size();i++) {            ListFragment fragment = new ListFragment();            Bundle bundle = new Bundle();            bundle.putString("title",titles.get(i));            fragment.setArguments(bundle);            fragmentList.add(fragment);        }        FragmentAdapter adapter = new FragmentAdapter(getSupportFragmentManager(), fragmentList, titles);        viewPager.setAdapter(adapter);        mTablayout.setupWithViewPager(viewPager);    }}

这里主要说下mTablayout.setupWithViewPager(viewPager)这个方法。这个方法会把TabLayout和ViewPager进行关联，无论哪一个控件改变，另外一个控件都会对应做出改变。当然，这是因为适配器的功能，当进行页面切换时，viewpger会回调适配器中的getItem方法去加载对应Frament，而TabLayout也会回调适配器中的getPageTitle方法。

layout/fragment_1.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">    <TextView        android:id="@+id/textView"        android:layout_width="match_parent"        android:layout_height="match_parent"        android:gravity="center"        android:text="fragment1"/></LinearLayout>

package com.hd.tabviewtest;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 android.widget.TextView;/** * Created by hd on 2016/3/5. */public class ListFragment extends Fragment {    @Nullable    @Override    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {        String title = getArguments().getString("title");        View view = inflater.inflate(R.layout.fragment_1, container, false);        TextView mTextView = (TextView) view.findViewById(R.id.textView);        mTextView.setText(title);        return view;    }}

com.hd.tabviewtest.FragmentAdapter

package com.hd.tabviewtest;import android.support.v4.app.Fragment;import android.support.v4.app.FragmentManager;import android.support.v4.app.FragmentStatePagerAdapter;import java.util.List;/** * Created by hd on 2016/3/5. */public class FragmentAdapter extends FragmentStatePagerAdapter {    private List<Fragment> mFragmentList;    private List<String> mTitleList;    public FragmentAdapter(FragmentManager fm, List<Fragment> fragmentsList, List<String> TitleList) {        super(fm);        mFragmentList = fragmentsList;        mTitleList = TitleList;    }    @Override    public Fragment getItem(int position) {        return mFragmentList.get(position);    }    @Override    public int getCount() {        return mFragmentList.size();    }    @Override    public CharSequence getPageTitle(int position) {        return mTitleList.get(position);    }}

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