android -> viewPaer 页面滑动

最新推荐文章于 2021-07-09 14:54:30 发布

mft8899

最新推荐文章于 2021-07-09 14:54:30 发布

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分类专栏： android java 文章标签：移动开发 java

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本文介绍如何使用Android中的ViewPager组件来实现多页面布局的切换效果。通过LayoutInflater加载不同的XML布局文件到ViewPager中，并自定义PagerAdapter来管理这些页面。具体展示了如何初始化ViewPager、创建页面布局以及配置PagerAdapter。

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MainActivity.java

public class MainActivity extends Activity {
    ViewPager viewpager;
    //
    private View view1, view2, view3;
    private List<View> viewList;//view数组

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //
        viewpager = (ViewPager) findViewById(R.id.viewpager);
        //\\
        LayoutInflater inflater=getLayoutInflater();
        view1 = inflater.inflate(R.layout.page1, null);
        view2 = inflater.inflate(R.layout.page2,null);
        view3 = inflater.inflate(R.layout.page3, null);
        //
        viewList = new ArrayList<View>();// 将要分页显示的View装入数组中
        viewList.add(view1);
        viewList.add(view2);
        viewList.add(view3);
        //\\
        PagerAdapter pagerAdapter = new PagerAdapter() {
            @Override
            public boolean isViewFromObject(View arg0, Object arg1) {
                // TODO Auto-generated method stub
                return arg0 == arg1;
            }

            @Override
            public int getCount() {
                // TODO Auto-generated method stub
                return viewList.size();
            }

            @Override
            public void destroyItem(ViewGroup container, int position,
                                    Object object) {
                // TODO Auto-generated method stub
                container.removeView(viewList.get(position));
            }

            @Override
            public Object instantiateItem(ViewGroup container, int position) {
                // TODO Auto-generated method stub
                container.addView(viewList.get(position));
                return viewList.get(position);
            }

        };
        viewpager.setAdapter(pagerAdapter);



    }
 

    //======================================
}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="horizontal"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

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

    </android.support.v4.view.ViewPager>

</LinearLayout>

page1.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="horizontal"
    android:background="#ff00ff"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >
    <TextView
        android:text="aaaaaaaaaa"
        android:layout_centerInParent="true"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />
</RelativeLayout>

page2.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="horizontal"
    android:background="#ff0000"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >
    <TextView
        android:text="bbbbbbbbb"
        android:layout_centerInParent="true"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />
</RelativeLayout>

page3.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="horizontal"
    android:background="#0000ff"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >
    <TextView
        android:text="cccccccccc"
        android:layout_centerInParent="true"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />
</RelativeLayout>