大神略過(guò)，如有不足，請(qǐng)輕噴?。?！最后附上下載地址。

在開始本篇文章前，咱們先來(lái)聊聊實(shí)現(xiàn)的思路。引導(dǎo)界面，ViewPager這是毋庸置疑的。然后就是圓點(diǎn)的實(shí)現(xiàn)，咱們可以自己畫出來(lái)相應(yīng)的圓點(diǎn)以及相鄰圓點(diǎn)之間的距離。利用ViewPager圖片移動(dòng)百分比(屏幕寬度)動(dòng)態(tài)算出圓點(diǎn)要移動(dòng)的距離。

ViewPager的實(shí)現(xiàn)相信來(lái)到這篇文章的童鞋都是會(huì)的，就直接貼代碼了

 @Override
    public int getCount() {
        return arrayImages.size();
    }

    @Override
    public boolean isViewFromObject(View view, Object object) {
        return view==object;
    }

    @Override
    public Object instantiateItem(ViewGroup container, int position) {
        ImageView iv = arrayImages.get(position);
        container.addView(iv);
        return iv;
    }

    @Override
    public void destroyItem(ViewGroup container, int position, Object object) {
        container.removeView((View)object);
    }

接下來(lái)的就是圓點(diǎn)的實(shí)現(xiàn)了：

• 首先需要在布局上畫出咱們的圓點(diǎn)個(gè)數(shù)：

// 動(dòng)態(tài)得出圓點(diǎn)的個(gè)數(shù)，距離，并添加到線性布局中
for (int i = 0;i<mImages.length;i++){
            ImageView iv = new ImageView(this);
            iv.setBackgroundResource(mImages[i]);
            mImageViewArrayList.add(iv);
            
            ImageView circleView = new ImageView(this);
            circleView.setBackgroundResource(R.drawable.guide_circle_shape_select);
            LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
                    LinearLayout.LayoutParams.WRAP_CONTENT,LinearLayout.LayoutParams.WRAP_CONTENT);
            if (i>0){
                params.leftMargin = 8;
            }
            circleView.setLayoutParams(params)；
            mLlContainear.addView(circleView);//在添加到布局文件中是的時(shí)需要注意一點(diǎn)：要添加的父布局是什么布局，這里添加的就是什么布局。
        }

• 得到兩個(gè)點(diǎn)之間的距離：(必須要頁(yè)面繪制完成，否者得到的距離為0)

mGuide_red_point.getViewTreeObserver().addOnGlobalLayoutListener(
                new ViewTreeObserver.OnGlobalLayoutListener() {
            @Override
            public void onGlobalLayout() {
                mGuide_red_point.getViewTreeObserver().removeOnGlobalLayoutListener(this);
                mPointWidth = mLlContainear.getChildAt(1).getLeft()-
                        mLlContainear.getChildAt(0).getLeft();
            }
        });

• 利用百分比得到移動(dòng)的距離并賦值：

 @Override
            public void onPageScrolled(int position,
                                       float positionOffset, int positionOffsetPixels) {

                int leftMargin = (int) (position * mPointWidth + mPointWidth * positionOffset);
                RelativeLayout.LayoutParams params = (RelativeLayout.LayoutParams)
                        mGuide_red_point.getLayoutParams();
                params.leftMargin = leftMargin;
                mGuide_red_point.setLayoutParams(params);
            }

最后附上完整的代碼：

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_guide);

        mGuide_viewpager =  (ViewPager) findViewById(R.id.guide_viewpager);
        mGuide_begin = (Button) findViewById(R.id.guide_begin);
        mLlContainear = (LinearLayout)findViewById(R.id.llContainer);
        mGuide_red_point = (ImageView)findViewById(R.id.guide_red_point);
        mImages = new int[]{R.drawable.guide_1,
                R.drawable.guide_3,
                R.drawable.guide_4,
                R.drawable.guide_5};

        mImageViewArrayList =  new ArrayList<ImageView>();

        // 動(dòng)態(tài)得出圓點(diǎn)的個(gè)數(shù)，距離，并添加到線性布局中
        for (int i = 0;i<mImages.length;i++){
            ImageView iv = new ImageView(this);
            iv.setBackgroundResource(mImages[i]);
            mImageViewArrayList.add(iv);

            ImageView circleView = new ImageView(this);
            circleView.setBackgroundResource(R.drawable.guide_circle_shape_select);
            LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
                    LinearLayout.LayoutParams.WRAP_CONTENT,LinearLayout.LayoutParams.WRAP_CONTENT);
            if (i>0){
                params.leftMargin = 8;
            }
            circleView.setLayoutParams(params);
            mLlContainear.addView(circleView);
        }

        mGuide_red_point.getViewTreeObserver().addOnGlobalLayoutListener(
                new ViewTreeObserver.OnGlobalLayoutListener() {
            @Override
            public void onGlobalLayout() {
                mGuide_red_point.getViewTreeObserver().removeOnGlobalLayoutListener(this);
                mPointWidth = mLlContainear.getChildAt(1).getLeft()-
                        mLlContainear.getChildAt(0).getLeft();
            }
        });

        Guide_Adapter ga = new Guide_Adapter(mImageViewArrayList,this);
        mGuide_viewpager.setAdapter(ga);

        mGuide_viewpager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
            @Override
            public void onPageScrolled(int position,
                                       float positionOffset, int positionOffsetPixels) {

                int leftMargin = (int) (position * mPointWidth + mPointWidth * positionOffset);
                RelativeLayout.LayoutParams params = (RelativeLayout.LayoutParams)
                        mGuide_red_point.getLayoutParams();
                params.leftMargin = leftMargin;
                mGuide_red_point.setLayoutParams(params);
            }

            @Override
            public void onPageSelected(int position) {
               
            }

            @Override
            public void onPageScrollStateChanged(int state) {

            }
        });
    }

Demo下載地址