使用TabLayout、ViewPager和Fragment實現頂部選單可滑動切換
阿新 • • 發佈:2019-02-15
效果圖如下
首先,要使用控制元件需要新增design library,在Android Studio中新增
compile 'com.android.support:design:23.4.0'
然後是佈局檔案
其中TabLayout中tabIndicatorColor屬性為標籤底部下滑線顏色,tabTextColor為標籤未選中時字型顏色,tabSelectedTextColor為選中時字型顏色<?xml version="1.0" encoding="utf-8"?> <RelativeLayout 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" tools:context="com.lg.tablayoutdemo.MainActivity"> <android.support.design.widget.TabLayout android:id="@+id/tab_layou" android:layout_width="match_parent" app:tabIndicatorColor="@android:color/holo_blue_light" app:tabTextColor="@android:color/darker_gray" app:tabSelectedTextColor="@android:color/black" android:layout_height="wrap_content" /> <android.support.v4.view.ViewPager android:id="@+id/view_pager" android:layout_below="@id/tab_layou" android:layout_width="match_parent" android:layout_height="match_parent" /> </RelativeLayout>
自定一個FragmentPagerAdapter介面卡
public class MyViewPagerAdapter extends FragmentPagerAdapter { private List<Fragment> fragments; private String[] titles; public MyViewPagerAdapter(FragmentManager fm, String[] titles, List<Fragment> fragments) { super(fm); this.titles = titles; this.fragments = fragments; } @Override public Fragment getItem(int arg0) { return fragments.get(arg0); } @Override public CharSequence getPageTitle(int position) { return titles[position]; } @Override public int getCount() { return fragments.size(); } }
Fragment程式碼我就不貼了,會在下面奉上原始碼地址
public class MainActivity extends AppCompatActivity implements TabLayout.OnTabSelectedListener { private TabLayout tabLayout; private ViewPager viewPager; private MyViewPagerAdapter viewPagerAdapter; //TabLayout標籤 private String[] titles=new String[]{"ANDROID","JAVA","C#","PHP"}; private List<Fragment> fragments=new ArrayList<>(); @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); init(); } private void init(){ tabLayout=(TabLayout)findViewById(R.id.tab_layou); viewPager=(ViewPager)findViewById(R.id.view_pager); //設定TabLayout標籤的顯示方式 tabLayout.setTabMode(TabLayout.MODE_FIXED); //迴圈注入標籤 for (String tab:titles){ tabLayout.addTab(tabLayout.newTab().setText(tab)); } //設定TabLayout點選事件 tabLayout.setOnTabSelectedListener(this); fragments.add(new AndroidFragment()); fragments.add(new JavaFragment()); fragments.add(new CshapFragment()); fragments.add(new PhpFragment()); viewPagerAdapter=new MyViewPagerAdapter(getSupportFragmentManager(),titles,fragments); viewPager.setAdapter(viewPagerAdapter); tabLayout.setupWithViewPager(viewPager); } @Override public void onTabSelected(TabLayout.Tab tab) { viewPager.setCurrentItem(tab.getPosition()); } @Override public void onTabUnselected(TabLayout.Tab tab) { } @Override public void onTabReselected(TabLayout.Tab tab) { } }
以上是核心程式碼,至此功能就實現了,當然也可 以根據不同的需求進行改動