PointerView

ViewPagerIndicator

用法：

Gradle

    compile 'cn.tinkling.pointerview:pointerview:1.0.0@aar'

Maven

    <dependency>
        <groupId>cn.tinkling.pointerview</groupId>
        <artifactId>pointerview</artifactId>
        <version>1.0.0</version>
        <type>aar</type>
    </dependency>

1.drawable(pointer_selector.xml):

    <selector xmlns:android="http://schemas.android.com/apk/res/android">
        <item android:state_selected="true" android:drawable="@drawable/pointer_selected"/>
        <item android:drawable="@drawable/pointer"/>
    </selector>

2.layout xml:

    <cn.tinkling.pointerview.PointerView xmlns:app="http://schemas.android.com/apk/res-auto"
        android:id="@+id/pointerView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:pointerDrawable="@drawable/pointer"
        app:spacing="fill_center" />

3.code:

    ViewPager viewPager = (ViewPager) findViewById(R.id.viewPager);
    ...
    final PointerView pointerView = (PointerView) findViewById(R.id.pointerView);
    pointerView.setPointerCount(viewPager.getAdapter().getCount());
    pointerView.setCurrentPosition(viewPager.getCurrentItem());
    viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
      @Override
      public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
        pointerView.setCurrentPosition(position, positionOffset);
      }
      
      @Override
      public void onPageSelected(int position) {}
      
      @Override
      public void onPageScrollStateChanged(int state) {}
    });
    ...