安卓界面之Viewpager和Tablayout实现滑动界面

摘要:六部实现选项卡界面

一.

在gradle文件添加以下代码:

implementation 'com.android.support:design:28.0.0'

在gradle文件添加以上代码后,才能使用Tablayout(版本号28.0.0是我做实验时最新的版本)

二.布局代码

<android.support.design.widget.TabLayout

            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            app:tabMaxWidth="0dp"
            app:tabGravity="fill"
            app:tabMode="fixed"
            android:id="@+id/tablayout_id"
            android:textAlignment="center"
            app:tabSelectedTextColor="@color/tabindicatorcolor"
            app:tabTextColor="@color/tabtextcolor"
            app:tabIndicatorColor="@color/tabindicatorcolor"
            android:background="@color/colorPrimary"/>

<!--app:tabIndicatorColor ：指示条的颜色-->
<!--app:tabIndicatorHeight ：指示条的高度-->
<!--app:tabSelectedTextColor ： tab被选中时的字体颜色-->
<!--app:tabTextColor ： tab未被选中时的字体颜色-->

 <android.support.v4.view.ViewPager
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:id="@+id/viewpager_id">
        </android.support.v4.view.ViewPager>

三.在res/layout目录下自定义xml文件作为fragment中的选项界面

　　action_fragment.xml和mark_fragment.xml分别为"行动","统计"选项卡界面

四.新建多个继承Fragment的子类返回选项界面

FragmentAction.java

public class FramentAction extends Fragment {

    public FramentAction() {
    }

    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View view=inflater.inflate(R.layout.action_fragment,container,false);
        return view;
    }
}

FragmentMark.java

public class FragmentMark extends Fragment {
    public FragmentMark() {
    }
    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View view=inflater.inflate(R.layout.mark_fragment,container,false);
        return view;
    }

}

五.自定义继承FragmentPagerAdapter的子类ViewPagerAdater,重写getItem(),getCount(),getPageTitle()方法,添加AddFragment()方法

public class ViewPagerAdaper extends FragmentPagerAdapter {

    private final List<Fragment> fragmentList=new ArrayList<>();
    private final List<String> fragementListTitle=new ArrayList<>();

    public ViewPagerAdaper(FragmentManager fm) {
        super(fm);
    }

    @Override
    public Fragment getItem(int i) {
        return fragmentList.get(i);
    }

    @Override
    public int getCount() {
        return fragementListTitle.size();
    }

    @Nullable
    @Override
    public CharSequence getPageTitle(int position) {
        return fragementListTitle.get(position);
    }

    public void AddFragemnt(Fragment fragment,String title){
        fragmentList.add(fragment);
        fragementListTitle.add(title);
    }
}

六.在MainActivity.java中实现以下代码:

 　　　　tabLayout=findViewById(R.id.tablayout_id);
        viewPager=findViewById(R.id.viewpager_id);
        ViewPagerAdaper mAdaper=new ViewPagerAdaper(getSupportFragmentManager());
        mAdaper.AddFragemnt(new FramentAction(),"行动");
        mAdaper.AddFragemnt(new FragmentMark(),"统计");
        viewPager.setAdapter(mAdaper);
        tabLayout.setupWithViewPager(viewPager);