ViewPager添加圆点

ViewPager用法参考上一篇http://blog.youkuaiyun.com/taoolee/article/details/48162507

方法一XML中实现

public class MainActivity extends Activity {
    private ViewPager mViewPager;
    private List<View> views;
    //管理圆点的
    private List<View>dots;
    private LayoutInflater mInflater;

    private int oldPosition = 0;// 记录上一次点的位置
    private int currentItem; // 当前页面

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

        dots = new ArrayList<View>();
        dots.add(findViewById(R.id.dot_1));
        dots.add(findViewById(R.id.dot_2));
        dots.add(findViewById(R.id.dot_3));
//另外一种实现方法实在代码中实现
        for(int i=0;i<3;i++){
            ImageView iv1=new ImageView(this);
            iv1.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,ViewGroup.LayoutParams.MATCH_PARENT));
            iv1.setImageResource(R.mipmap.point_normal);


        }





        mViewPager = (ViewPager) findViewById(R.id.viewpager);
        views = new ArrayList<>();
        mInflater = getLayoutInflater();
        View view1 = mInflater.inflate(R.layout.viewpager_item1, null);
        View view2 = mInflater.inflate(R.layout.viewpager_item2, null);
        View view3 = mInflater.inflate(R.layout.viewpager_item3, null);
        views.add(view1);
        views.add(view2);
        views.add(view3);

        MyAdapter myAdapter=new MyAdapter(views);
        mViewPager.setAdapter(myAdapter);

        //因为开始页面不响应页面滑动，所以先把开始页面设置为选中背景
        dots.get(0).setBackgroundResource(R.mipmap.point_select);
        //设置ViewPager的默认项, 设置为长度的100倍，这样子开始就能往左滑动
       // mViewPager.setCurrentItem((views.size()) * 100);

        //addOnPageChangeListener替换掉setOnPageChangeListener
        mViewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
            //当前页面
            @Override
            public void onPageSelected(int position) {
                // TODO Auto-generated method stub

                dots.get(oldPosition).setBackgroundResource(R.mipmap.point_normal);
                dots.get(position).setBackgroundResource(R.mipmap.point_select);

                oldPosition = position;
                currentItem = position;
            }

            @Override
            public void onPageScrolled(int arg0, float arg1, int arg2) {

            }

            @Override
            public void onPageScrollStateChanged(int arg0) {
            }
        });
    }
}

<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"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin"
    tools:context=".MainActivity">

    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent" >

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

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="35dip"
            android:layout_gravity="bottom"
            android:gravity="center"
            android:orientation="vertical" >

            <LinearLayout
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginTop="3dip"
                android:orientation="horizontal" >


                <View
                    android:id="@+id/dot_1"
                    android:layout_width="10dip"
                    android:layout_height="10dip"
                    android:layout_marginLeft="2dip"
                    android:layout_marginRight="2dip"
                    android:background="@mipmap/point_normal" />

                <View
                    android:id="@+id/dot_2"
                    android:layout_width="10dip"
                    android:layout_height="10dip"
                    android:layout_marginLeft="2dip"
                    android:layout_marginRight="2dip"
                    android:background="@mipmap/point_normal" />

                <View
                    android:id="@+id/dot_3"
                    android:layout_width="10dip"
                    android:layout_height="10dip"
                    android:layout_marginLeft="2dip"
                    android:layout_marginRight="2dip"
                    android:background="@mipmap/point_normal" />
            </LinearLayout>
        </LinearLayout>
    </FrameLayout>


</RelativeLayout>

方法二代码中实现

public class MainActivity extends Activity {
    private ViewPager mViewPager;
    private List<View> views;
    //管理圆点的
    private List<ImageView> dots;
    private LayoutInflater mInflater;
    private LinearLayout mLinearLayout;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //另外一种实现方法在代码中实现
        dots = new ArrayList<>();
        mLinearLayout= (LinearLayout) findViewById(R.id.linerlayout);
        for (int i = 0; i < 3; i++) {
            ImageView iv1 = new ImageView(this);
            iv1.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT));
            iv1.setImageResource(R.mipmap.point_normal);
            iv1.setLeft(50);

            dots.add(iv1);

            mLinearLayout.addView(iv1);
        }
        //因为开始页面不响应页面滑动，所以先把开始页面设置为选中背景setBackgroundResource不可以
        dots.get(0).setImageResource(R.mipmap.point_select);

        mViewPager = (ViewPager) findViewById(R.id.viewpager);
        views = new ArrayList<>();
        mInflater = getLayoutInflater();
        View view1 = mInflater.inflate(R.layout.viewpager_item1, null);
        View view2 = mInflater.inflate(R.layout.viewpager_item2, null);
        View view3 = mInflater.inflate(R.layout.viewpager_item3, null);
        views.add(view1);
        views.add(view2);
        views.add(view3);

        MyAdapter myAdapter = new MyAdapter(views);
        mViewPager.setAdapter(myAdapter);


        //addOnPageChangeListener替换掉setOnPageChangeListener
        mViewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
            //当前页面
            @Override
            public void onPageSelected(int position) {
             //遍历当前页改变背景其他背景设为常规

                for (ImageView iv1 : dots) {
                    iv1.setImageResource(R.mipmap.point_normal);

                }
                dots.get(position).setImageResource(R.mipmap.point_select);
            }

            @Override
            public void onPageScrolled(int arg0, float arg1, int arg2) {

            }

            @Override
            public void onPageScrollStateChanged(int arg0) {
            }
        });
    }
}

<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"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin"
    tools:context=".MainActivity">

    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent" >

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

        <LinearLayout
            android:id="@+id/linerlayout"
            android:layout_width="match_parent"
            android:layout_height="50dip"
            android:layout_gravity="bottom"
            android:gravity="center"
            android:orientation="horizontal" >

        </LinearLayout>
    </FrameLayout>


</RelativeLayout>