ViewPager的使用

来源：互联网发布：node express restful 编辑：程序博客网时间：2024/05/29 04:16

首先布局文件添加ViewPager控件

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="vertical"    android:layout_width="match_parent"    android:layout_height="match_parent"> <android.support.v4.view.ViewPager     android:id="@+id/vp"     android:layout_width="wrap_content"     android:layout_height="wrap_content"></android.support.v4.view.ViewPager></LinearLayout>

然后在Activity得到控件添加需要展示的view 设置adapter
重写两个方法destroyItem（//滑动切换的时候销毁当前的组件）
instantiateItem（//每次滑动的时候生成的组件）

package com.example.gs_pc.zgs;import android.app.Activity;import android.os.Bundle;import android.support.v4.view.PagerAdapter;import android.support.v4.view.ViewPager;import android.view.View;import android.view.ViewGroup;import android.widget.ImageView;import java.util.ArrayList;import java.util.List;/** * Created by Gs-pc on 2016/7/30. */public class GuideAcitivty extends Activity{    private ViewPager vp;    private int Image[] = {R.drawable.q,R.drawable.w,R.drawable.e};    private List<ImageView>list;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.guide_activity);        vp = (ViewPager) findViewById(R.id.vp);        list = new ArrayList<ImageView>();        for (int i = 0;i<Image.length;i++){            ImageView iv = new ImageView(this);            iv.setBackgroundResource(Image[i]);            list.add(iv);        }        vp.setAdapter(new MyAdapter());    }    class MyAdapter extends PagerAdapter{        @Override        public int getCount() {            return list.size();        }        @Override        public boolean isViewFromObject(View view, Object object) {            return view == object;        }        @Override        public void destroyItem(ViewGroup container, int position, Object object) {            container.removeView((View) object);        }        @Override        public Object instantiateItem(ViewGroup container, int position) {            ImageView iv = list.get(position);            container.addView(iv);            return iv;        }    }}

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