ViewPager及ViewPager的使用

最新推荐文章于 2024-11-11 09:34:18 发布

原创最新推荐文章于 2024-11-11 09:34:18 发布 · 151 阅读

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文章标签：

#android #android studio #java

本文介绍了在Android中如何使用ViewPager组件，包括布局设置、数据源创建、自定义PagerAdapter以及Fragment的配合使用，展示了如何在ViewPager中展示多个Fragment页面。

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1.首先准备布局

<android.support.v4.view.ViewPager android:id="@+id/viewpager" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center" />

2.准备数据源

LayoutInflater inflater=getLayoutInflater(); View view1 = inflater.inflate(R.layout.layout1, null); ArrayList<View>() viewList = new ArrayList<View>(); viewList.add(view1); MyAdapter myAdapter=new MyAdapter(this,viewList); viewPager.setAdapter(myAdapter);

3.自定义MyAdapter继承PagerAdapter，重写四个方法

public class MyAdapter extends PagerAdapter { public int getCount() { return viewList .size();} public boolean isViewFromObject(View view, Object object) { return view==object; }

fragment的Java后台

public class PagerFragment extends Fragment { String mContent; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { mContent = (String) getArguments().get("content"); View view = inflater.inflate(R.layout.fragment_pager, container, false) ; TextView textView = (TextView) view.findViewById(R.id.tv); textView.setText(mContent); return view; } }

final List<PagerFragment> list = new ArrayList<>(); for (int i = 0; i < 5; i++) { PagerFragment fragment = new PagerFragment(); Bundle bundle = new Bundle(); bundle.putString("content","第"+i+"个Fragment"); fragment.setArguments(bundle); list.add(fragment); } ViewPager vp = (ViewPager) findViewById(R.id.vp); vp.setAdapter(new FragmentStatePagerAdapter(getSupportFragmentManager()) { @Override public Fragment getItem(int position) { return list.get(position); } @Override public int getCount() { return list.size(); } });

xml页面布局: