Android动态给ViewPager添加Indicator导航

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package com.duanlian.viewpagerindicatordemo;

import android.os.Bundle;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.widget.ImageView;
import android.widget.LinearLayout;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {
  private ViewPager mViewPager;
  private LinearLayout mLinear;
  private List mList;
  private PagerAdapter mPagerAdapter;
  private int[] imageArray = {R.mipmap.banner1, R.mipmap.banner2, R.mipmap.banner3, R.mipmap.ic_launcher};

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

  private void initView() {
    mViewPager = (ViewPager) findViewById(R.id.viewpager);
    mLinear = (LinearLayout) findViewById(R.id.linear);
    //给ViewPager添加图片显示
    mList = new ArrayList<>();
    for (int i = 0; i 

package com.duanlian.viewpagerindicatordemo;


import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;

import java.util.List;

/**
 * viewPager的adapter
 */

public class PagerAdapter extends android.support.v4.view.PagerAdapter{
  private List list;

  public PagerAdapter(List list) {
    this.list = list;
  }

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

  @Override
  public boolean isViewFromObject(View view, Object object) {
    return view==object;
  }
  @Override
  public Object instantiateItem(ViewGroup container, int position) {
    container.addView(list.get(position));//添加页卡
    return list.get(position);
  }

  @Override
  public void destroyItem(ViewGroup container, int position, Object object) {
    container.removeView(list.get(position));//删除页卡
  }
}