Viewpager实现跳转

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package com.example.qq_lite;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.support.annotation.Nullable;import android.support.v4.view.PagerAdapter;import android.support.v4.view.ViewPager;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.ImageView;import java.util.ArrayList;import java.util.List;/** * Created by linpiaohsin on 2017/11/15. */public class ViewPagerActivity extends Activity {    ViewPager viewPager;    List<ImageView> listView;    int[] images=new int[]{R.drawable.pic1,R.drawable.pic2,R.drawable.pic3};    @Override    protected void onCreate(@Nullable Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.view_pager_activity);        viewPager=findViewById(R.id.viewPager);        viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {            @Override            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {            }            @Override            public void onPageSelected(int position) {            }            @Override            public void onPageScrollStateChanged(int state) {                Boolean misScrolled=false;                switch (state) {                    case ViewPager.SCROLL_STATE_DRAGGING:                        misScrolled = false;                        break;                    case ViewPager.SCROLL_STATE_SETTLING:                        misScrolled = true;                        break;                    case ViewPager.SCROLL_STATE_IDLE:                        if (viewPager.getCurrentItem() == viewPager.getAdapter().getCount() - 1 && !misScrolled) {                            startActivity(new Intent(ViewPagerActivity.this, MainActivity.class));                            ViewPagerActivity.this.finish();                        }                        misScrolled = true;                        break;                }            }        });        listView=new ArrayList<>();        init();        PagerAdapter pagerAdapter=new PagerAdapter() {            @Override            public int getCount() {                return listView.size();            }            @Override            public boolean isViewFromObject(View view, Object object) {                return view==object;            }            @Override            public void destroyItem(ViewGroup container, int position, Object object) {                container.removeView(listView.get(position));            }            @Override            public Object instantiateItem(ViewGroup container, int position) {                container.addView(listView.get(position));                return listView.get(position);            }        };        viewPager.setAdapter(pagerAdapter);    }    private void init() {        for (int image:images){            ImageView imageView=new ImageView(getApplicationContext());            imageView.setScaleType(ImageView.ScaleType.FIT_XY);            imageView.setImageResource(image);            listView.add(imageView);        }    }}
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