<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"

android:layout\_height="match\_parent">  
<androidx.viewpager.widget.ViewPager  
    android:id="@+id/vp\_guide"  
    android:layout\_width="match\_parent"  
    android:layout\_height="match\_parent">  
</androidx.viewpager.widget.ViewPager>

<RelativeLayout  
    android:layout\_width="wrap\_content"  
    android:layout\_height="wrap\_content"  
    android:layout\_alignParentBottom="true"  
    android:layout\_centerHorizontal="true"  
    android:layout\_marginBottom="30dip">

    <LinearLayout  
        android:id="@+id/ll\_guide\_points"  
        android:layout\_width="wrap\_content"  
        android:layout\_height="wrap\_content"  
        android:orientation="horizontal">  
    </LinearLayout>

    <View  
        android:id="@+id/v\_guide\_redpoint"  
        android:layout\_width="10px"  
        android:layout\_height="10px"  
   android:background="@drawable/shap"/>

</RelativeLayout>

public class MyAdapter extends PagerAdapter {
private List mGuids;

public MyAdapter(Context ctx, List<ImageView> guids) {  
    this.mGuids = guids;  
}

@Override  
public int getCount() {  
    return mGuids.size();// 返回数据的个数  
}

@Override  
public boolean isViewFromObject(View arg0, Object arg1) {  
    return arg0 == arg1;// 过滤和缓存的作用  
}

@Override  
public void destroyItem(ViewGroup container, int position, Object object) {  
    container.removeView((View) object);//从viewpager中移除掉  
}

@Override  
public Object instantiateItem(ViewGroup container, int position) {  
    // container viewpaper  
    //获取View  
    View child = mGuids.get(position);  
    // 添加View  
    container.addView(child);  
    return child;  
}  

}

public class MainActivity extends AppCompatActivity {
private ViewPager mVp_Guide;
private View mGuideRedPoint;
private LinearLayout mLlGuidePoints;
private int[] mPics = new int[]{R.drawable.lunch1, R.drawable.lunch2, R.drawable.lunch3, R.drawable.lunch4};
private View v_point;
private int disPoints;
private int currentItem;
private MyAdapter adapter;
private List guids;
private int width;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

// UIUtils.init(getApplicationContext());
WindowManager windowManager = (WindowManager) getApplicationContext().getSystemService(Context.WINDOW_SERVICE);
//获取屏幕的宽度
Point size = new Point();
windowManager.getDefaultDisplay().getSize(size);
width = size.x;
initView();
initData();
initEvent();

    }

    private void initView() {  
        mVp\_Guide = (ViewPager) findViewById(R.id.vp\_guide);  
        mGuideRedPoint = findViewById(R.id.v\_guide\_redpoint);  
        mLlGuidePoints = (LinearLayout) findViewById(R.id.ll\_guide\_points);  
    }

    private void initData() {  
        // viewpaper adapter适配器  
        guids = new ArrayList<ImageView>();

        //创建viewpager的适配器  
        for (int i = 0; i < mPics.length; i++) {  
            ImageView iv\_temp = new ImageView(getApplicationContext());  
            iv\_temp.setBackgroundResource(mPics\[i\]);

            //添加界面的数据  
            guids.add(iv\_temp);

            //灰色的点在LinearLayout中绘制：  
            //获取点  
           v\_point = new View(getApplicationContext());  
            v\_point.setBackgroundResource(R.drawable.shap2);//灰点背景色  
            //设置灰色点的显示大小  
            LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(10, 10);  
            //设置点与点的距离,第一个点除外  
            if (i != 0)  
                params.leftMargin = 47;  
            v\_point.setLayoutParams(params);

            mLlGuidePoints.addView(v\_point);  
        }

        // 创建viewpager的适配器  
        adapter = new MyAdapter(getApplicationContext(), guids);  
        // 设置适配器  
        mVp\_Guide.setAdapter(adapter);  
    }

    private void initEvent() {  
        //监听界面绘制完成  
        mGuideRedPoint.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {  
            @Override  
            public void onGlobalLayout() {  
                //取消注册界面而产生的回调接口  
                mGuideRedPoint.getViewTreeObserver().removeGlobalOnLayoutListener(this);  
                //计算点于点之间的距离  
                disPoints = (mLlGuidePoints.getChildAt(1).getLeft() - mLlGuidePoints.getChildAt(0).getLeft());  
            }  
        });

        //滑动事件监听滑动距离，点更随滑动。  
        mVp\_Guide.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {  
            @Override  
            public void onPageSelected(int position) {  
           /\* //当前viewpager显示的页码  
            //如果viewpager滑动到第三页码（最后一页），显示进入的button  
            if (position == guids.size() - 1) {  
                bt\_startExp.setVisibility(View.VISIBLE);//设置按钮的显示  
            } else {  
                //隐藏该按钮  
                bt\_startExp.setVisibility(View.GONE);  
            }\*/  
                currentItem = position;  
            }

            /\*\*  
             \*页面滑动调用，拿到滑动距离设置视图的滑动状态  
             \* @param position 当前页面位置  
             \* @param positionOffset 移动的比例值  
             \* @param positionOffsetPixels 便宜的像素  
             \*/  
            @Override  
            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {  
                //计算红点的左边距  
                float leftMargin = disPoints \* (position + positionOffset);  
                //设置红点的左边距  
                RelativeLayout.LayoutParams layoutParams = (RelativeLayout.LayoutParams) mGuideRedPoint.getLayoutParams();  
                //对folat类型进行四舍五入，  
                layoutParams.leftMargin = Math.round(leftMargin);  
                //设置位置  
                mGuideRedPoint.setLayoutParams(layoutParams);  
            }

            @Override  
            public void onPageScrollStateChanged(int state) {  
            }  
        });

        //给页面设置触摸事件  
        mVp\_Guide.setOnTouchListener(new View.OnTouchListener() {  
            float startX;  
            float endX;

            @Override  
            public boolean onTouch(View v, MotionEvent event) {  
                switch (event.getAction()) {  
                    case MotionEvent.ACTION\_DOWN:  
                        startX = event.getX();  
                        break;  
                    case MotionEvent.ACTION\_UP:  
                        endX = event.getX();

                        //首先要确定的是，是否到了最后一页，然后判断是否向左滑动，并且滑动距离是否符合，我这里的判断距离是屏幕宽度的4分之一（这里可以适当控制）  
                        if (currentItem == (guids.size() - 1) && startX - endX >= (width / 4)) {  
                            Toast.makeText( MainActivity.this, "跳转", Toast.LENGTH\_SHORT ).show();  
                            //进入主页  

// Intent intent = new Intent(MainActivity.this, Main2Activity.class);
// startActivity(intent);
// //这部分代码是切换Activity时的动画，看起来就不会很生硬
// overridePendingTransition(android.R.anim.slide_in_left, android.R.anim.slide_out_right);
// finish();
}
break;
}
return false;
}
});
}

    @Override  
    public boolean onKeyDown(int keyCode, KeyEvent event) {  
        return true;  
    }

}

    <corners android:radius="10dp"/>  
    <solid android:color="#e7e7e7"/>  
    <size android:width="10px"  
        android:height="10px"/>