Android(安卓)TabLayout 结合ViewPager实现标签页切换
16lz
2021-01-26
第一步导入tablayout的依赖
在module里的build.gradle
compile 'com.android.support:design:25.3.1' 如果和本项目的V7包冲突，只需要把版本号改成一致就可以了 写布局，注意Tablayout是support.design.widget下的
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical"> <android.support.design.widget.TabLayout android:id="@+id/tablayout" android:layout_width="wrap_content" android:layout_height="wrap_content" app:tabMode="scrollable" app:tabSelectedTextColor="#FC4E4E" >android.support.design.widget.TabLayout> <android.support.v4.view.ViewPager android:id="@+id/viewpager" android:layout_width="match_parent" android:layout_height="0dp" android:layout_weight="1">android.support.v4.view.ViewPager>LinearLayout>
创建fragment布局
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical"> <TextView android:id="@+id/tv" android:layout_width="match_parent" android:layout_height="match_parent" android:gravity="center" android:text="fragment" android:textSize="40sp" />LinearLayout>
创建fragment
public class MyFragment extends Fragment { public static final String ARG_PAGE = "ARG_PAGE"; private int mPage; public static MyFragment newInstance(int Page) { Bundle args = new Bundle(); args.putInt(ARG_PAGE, Page); MyFragment myFragment = new MyFragment(); myFragment.setArguments(args); return myFragment; } @Override public void onCreate(@Nullable Bundle savedInstanceState) { super.onCreate(savedInstanceState); mPage = getArguments().getInt(ARG_PAGE); } @Nullable @Override public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { View view = inflater.inflate(R.layout.frag_layout,container,false); TextView tv = (TextView) view.findViewById(R.id.tv); tv.setText("FragMent #" + mPage); return view; }}
我们使用的是ViewPager结合Fragment，所以要配置适配器FragMentPagerAdapter
public class MyFragmentAdapter extends FragmentPagerAdapter { final int PAGE_COUNT = 9; private String tabTitles[] = new String[]{"tab1", "tab2", "tab3", "tab4", "tab5", "tab6", "tab7", "tab8", "tab9"}; private Context context; public MyFragmentAdapter(FragmentManager fm, Context context) { super(fm); this.context = context; } @Override public Fragment getItem(int position) { return MyFragment.newInstance(position + 1); } @Override public int getCount() { return PAGE_COUNT; } @Override public CharSequence getPageTitle(int position) { return tabTitles[position]; }}
适配器与fragmen都写完了，接下来在Activity里面
public class TabActivity extends FragmentActivity { private ViewPager vp; private MyFragmentAdapter adapter; private TabLayout tabLayout; @Override protected void onCreate(@Nullable Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.tab_layout); vp = (ViewPager) findViewById(R.id.viewpager); tabLayout = (TabLayout) findViewById(R.id.tablayout); //配置适配器 adapter = new MyFragmentAdapter(getSupportFragmentManager(), TabActivity.this); vp.setAdapter(adapter); tabLayout.setupWithViewPager(vp);// 设置此模式，在title条目数比较多的时候会拥挤在一起，所以如果条目很多一个屏幕容不下的时候就不要设置次方法// tabLayout.setTabMode(TabLayout.MODE_FIXED); }}在初始化Tablayout的时候，setupWithViewPager这个方法出不来，仔细找原来是导包导错了，正确的包是
import android.support.design.widget.TabLayout;千万不要搞错了
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