ViewPager(页面滑动,加动态点,循环,加标题)

本文将指导您如何使用 Android 的 ViewPager 和 Adapter 实现动态的页面滑动、按钮点击事件、标题显示以及实现伪循环滑动效果,包括添加动态指示器、设置标题和背景颜色、以及响应页面切换时的操作。

摘要生成于 C知道 ,由 DeepSeek-R1 满血版支持, 前往体验 >

页面滑动

1、新建项目,导包

1、用eclipse: 新建android application activity,最后是blank activity
找到sdk中的android.support.v4.jar包复制到 android private Libraries
2、用android studio: 新建module,建立完成后,file》project structure 导入jar包

2、在layout下的activity_viewpager布局

<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"
    tools:context=".ViewPagerActivity">

    <android.support.v4.view.ViewPager//一定要写全称
        android:id="@+id/viewpager"
        android:layout_width="match_parent"
        android:layout_height="match_parent"></android.support.v4.view.ViewPager>

</RelativeLayout>

3、写一个Adapter

//注意其中的方法返回值
public class MyPagerAdapter extends PagerAdapter {
    private List<View> views;


    public MyPagerAdapter(List<View> views) {
        this.views = views;
    }

    @Override
    public int getCount() {
        // TODO Auto-generated method stub
        return views.size();
    }
    @Override
    public void destroyItem(ViewGroup container, int position, Object object) {
        container.removeView(views.get(position));
    }
    @Override
    public Object instantiateItem(ViewGroup container, int position) {
        // TODO Auto-generated method stub
        container.addView(views.get(position));
        return views.get(position);
    }
    @Override
    public boolean isViewFromObject(View arg0, Object arg1) {
        // TODO Auto-generated method stub
        return arg0 ==arg1;
    }

}

4、写几个界面布局的xml

//例如这是一个图片的界面
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#ffcccc">
    <ImageView
        android:id="@+id/imageview"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:src="@mipmap/meinv"/>
</LinearLayout>
__________________________________
<LinearLayout 
//加个按钮
xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent"
   >
    <Button
        android:id="@+id/button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="点我吧"
        android:layout_gravity="center"
        android:layout_marginTop="30dp"/>
</LinearLayout>

可以再写几个……

5、在ViewPagerActivity中添加几个布局

public class ViewpagerActivity extends Activity {
   private ViewPager mViewPager;
   private List<View> views;
   private LayoutInflater mFlater;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_viewpager);
        mViewPager = (ViewPager) findViewById(R.id.viewpager);
        views = new ArrayList<View>();
        mFlater = getLayoutInflater();
        View view1 = mFlater.inflate(R.layout.item_view1, null);
        View view2 = mFlater.inflate(R.layout.item_view2, null);
        View view3 = mFlater.inflate(R.layout.item_view3, null);
        views.add(view1);
        views.add(view2);
        views.add(view3);
        MyPagerAdapter mAdapter = new MyPagerAdapter(views);
        mViewPager.setAdapter(mAdapter);;
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.viewpager, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }
}

6、对按钮建立点击事件

//adapter中
 @Override
    public Object instantiateItem(ViewGroup container, int position) {
        // TODO Auto-generated method stub
        View view = views.get(position);
        container.addView(view);
        if(position==2){//第三个viewpager
            Button buttton = (Button) view.findViewById(R.id.button);
            buttton.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    Toast.makeText(v.getContext(),"你点击了我",Toast.LENGTH_SHORT).show();
                }
            });
        }
        return view;
    }

最终效果如下:
这里写图片描述

加动态点

1、在view_pager.xml文件下加一个Linearlayout

 <LinearLayout
        android:id="@+id/linraelayout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_marginBottom="20dp"
        android:gravity="center"
        android:orientation="horizontal">
    </LinearLayout>

2、在activity中添加ImageView

        views = new ArrayList<>();
        View view1 = mFlater.inflate(R.layout.item_view1, null);
        View view2 = mFlater.inflate(R.layout.item_view2, null);
        View view3 = mFlater.inflate(R.layout.item_view3, null);
        views.add(view1);
        views.add(view2);
        views.add(view3);
        mPoints = new ArrayList<>();
     for (int i = 0; i < views.size(); i++) {//用for循环对每个view添加动态点
            ImageView img = new ImageView(this);
            img.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT));
            img.setImageResource(R.mipmap.search_normal);//没有滚到时的点图片
            img.setPadding(20, 20, 20, 20);//设置点的距离
            mPoints.add(img);
            mLinearlayout.addView(img);
        }
            mPoints.get(0).setImageResource(R.mipmap.search_selected);//滚到时的点图片
         MyPagerAdapter mAdapter = new MyPagerAdapter(views);
        mViewPager.setAdapter(mAdapter);

          mViewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {//页面变化时动态点的改变
            @Override
            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

            }

            @Override
            public void onPageSelected(int position) {
                for (ImageView iv : mPoints) {
                    iv.setImageResource(R.mipmap.search_normal);//先设置为全部是没有滚到是的效果
                }
                mPoints.get(position).setImageResource(R.mipmap.search_selected);//得到相应的位置,设置动态点为滚到时的效果图片
            }

实现伪循环滑动

1、在Adapter中

  @Override
    public int getCount() {
        return Integer.MAX_VALUE;//返回最大值
    }

 public Object instantiateItem(ViewGroup container, int position) {
        // TODO Auto-generated method stub
        View view = views.get(position%views.size());//注意这里
        if(view.getParent()!=null){
            container.removeView(view);
        }
        container.addView(view);
        if(position%views.size()==2){
            Button buttton = (Button) view.findViewById(R.id.button);
            buttton.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    Toast.makeText(v.getContext(),"你点击了我",Toast.LENGTH_SHORT).show();
                }
            });
        }
        return view;
    }

2、在activity中的相应改变

    @Override
            public void onPageSelected(int position) {
                for (ImageView iv : mPoints) {
                    iv.setImageResource(R.mipmap.search_normal);
                }
                mPoints.get(position % views.size()).setImageResource(R.mipmap.search_selected);
            }

            @Override
            public void onPageScrollStateChanged(int state) {

            }
        });
        mViewPager.setCurrentItem(Integer.MAX_VALUE / 2 - Integer.MAX_VALUE / 2 % mPoints.size());//注意这里的变化
    }

加标题

1、在view_pager.xml文件下添加


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

        <android.support.v4.view.PagerTabStrip//写全名称,写在viewpager里面
            android:id="@+id/pager"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="bottom"//设置为在底部
          android:layout_marginTop="5dp"></android.support.v4.view.PagerTabStrip>
    </android.support.v4.view.ViewPager>

2、在Adapter中

   private String[] title={"标题1","标题2","标题3"};


    public MyPagerAdapter(List<View> views) {
        this.views = views;
    }
//然后重写getPageTitle方法
    @Override
    public CharSequence getPageTitle(int position) {
        return title[position%title.length];
    }

3、在activity中

 private LinearLayout mLinearlayout;
    private PagerTabStrip mPagerTob;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_view_pager);
        mViewPager = (ViewPager) findViewById(R.id.viewpager);
        mLinearlayout = (LinearLayout) findViewById(R.id.linraelayout);
        mPagerTob = (PagerTabStrip) findViewById(R.id.pager);
        mPagerTob.setBackgroundColor(Color.GREEN);//设置背景颜色
        mPagerTob.setTabIndicatorColor(Color.RED);//设置下划线颜色
        mPagerTob.setTextColor(Color.BLUE);//设置文本颜色
        mPagerTob.setDrawFullUnderline(true);
评论
添加红包

请填写红包祝福语或标题

红包个数最小为10个

红包金额最低5元

当前余额3.43前往充值 >
需支付:10.00
成就一亿技术人!
领取后你会自动成为博主和红包主的粉丝 规则
hope_wisdom
发出的红包
实付
使用余额支付
点击重新获取
扫码支付
钱包余额 0

抵扣说明:

1.余额是钱包充值的虚拟货币,按照1:1的比例进行支付金额的抵扣。
2.余额无法直接购买下载,可以购买VIP、付费专栏及课程。

余额充值