带指示点的无限轮播(直接可以向左滑,速度稳定,时间久了速度也不会变)

无限轮播的分析图  ：指示点及图片显示角标的对照

package myapp.first.myapplication.view;

import android.content.Context;
import android.os.Handler;
import android.os.Message;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;

/**
* Created by xi on 2016/7/9.
*/
public class RollViewPager extends ViewPager {
public RollViewPager(Context context) {
super(context);
}

public RollViewPager(Context context, AttributeSet attrs) {
super(context, attrs);
}

@Override
public void addOnPageChangeListener(OnPageChangeListener listener) {
MyPageChangeListener myPageChangeListener = new MyPageChangeListener(listener);
super.addOnPageChangeListener(myPageChangeListener);
}

@Override
public void setAdapter(PagerAdapter adapter) {
//  修正  adapter 中position
MyAdapter myAdapter = new MyAdapter(adapter);
addOnPageChangeListener(null); //手动增加一个监听
super.setAdapter(myAdapter);
setCurrentItem(1);
//开启自动轮播
startScroll();//自动轮播
}

@Override
public boolean onTouchEvent(MotionEvent ev) {
//手指触摸  按下 停止轮播  抬起继续轮播
switch (ev.getAction()){
case MotionEvent.ACTION_DOWN:
stopScroll();
break;
case MotionEvent.ACTION_MOVE:
break;
case MotionEvent.ACTION_CANCEL://取消事件
case MotionEvent.ACTION_UP:
startScroll();
break;
}

return super.onTouchEvent(ev);
}

Handler handler = new Handler(){
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
int currentItem = getCurrentItem();
currentItem ++;
setCurrentItem(currentItem);
handler.sendEmptyMessageDelayed(1, 4000);//4s发送消息
}
};

public void startScroll() {
//开启轮播
handler.sendEmptyMessageDelayed(1, 4000);//4s发送消息
}

public void stopScroll(){
handler.removeMessages(1);
}

public class MyPageChangeListener implements OnPageChangeListener {

private OnPageChangeListener listener;
private int position;

public MyPageChangeListener(OnPageChangeListener listener) {

this.listener = listener;
}

@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
if (listener != null)
listener.onPageScrolled(position, positionOffset, positionOffsetPixels);
}

@Override
public void onPageSelected(int position) {
this.position = position;
if (listener != null)
listener.onPageSelected(position);
}

@Override
public void onPageScrollStateChanged(int state) {
//状态改变的时候 调用    手指抬起的时候切换
if (state == ViewPager.SCROLL_STATE_IDLE) {
//空闲切换
// 页面切换   自动的切换到对应的界面    最后一个A----->第一个A
if (position == getAdapter().getCount() - 1) {
//最后一个元素  是否平滑切换
setCurrentItem(1, false);
} else if (position == 0) {
//是第一个元素{D] ----> 倒数第二个元素[D]
setCurrentItem(getAdapter().getCount() - 2, false);
}
}
if (listener != null)
listener.onPageScrollStateChanged(state);
}
}

public class MyAdapter extends PagerAdapter {

private PagerAdapter adapter;

public MyAdapter(PagerAdapter adapter) {

this.adapter = adapter;  //[ABCD]
}

@Override
public Object instantiateItem(ViewGroup container, int position) {
//  position 已经是 [DABCDA] 的索引了
// 修正后的索引 应该是 [ABCD]的索引
//修正position
if (position == 0) { //新增的D
position = adapter.getCount() - 1;// 最后一个元素
} else if (position == getCount() - 1) {  //最后一个元素 A
position = 0;
} else {
position -= 1; //计算新的索引
}
return adapter.instantiateItem(container, position);
}

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

@Override
public int getCount() {
return adapter.getCount() + 2;
}

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

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">

<myapp.first.myapplication.view.RollViewPager
android:id="@+id/roll_viewpager"
android:layout_width="match_parent"
android:layout_height="match_parent"/>

<include layout="@layout/ll_roll_point"/>
<!--<include layout="@layout/ll_roll_number"/>-->

</FrameLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/ll_point"
android:gravity="bottom|center_horizontal"
android:layout_gravity="bottom"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#00000000"
android:layout_marginBottom="8dp"
android:orientation="horizontal">

</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="45dp"
android:layout_height="45dp"
android:gravity="center"
android:layout_gravity="right|bottom"
android:paddingTop="5dp"
android:layout_marginBottom="11dp"
android:layout_marginRight="13dp"
android:id="@+id/ll_roll_number"
android:background="@drawable/roll_circle_conner">
<TextView
android:id="@+id/tv_current_number"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#ffffff"
android:textSize="20dp"
android:layout_marginBottom="3dp"
android:text="1"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#ffffff"
android:textSize="18dp"
android:text="/"/>
<TextView
android:id="@+id/tv_count_number"
android:textColor="#ffffff"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="n"
android:layout_centerVertical="true"
android:layout_toRightOf="@+id/chu"
android:layout_toEndOf="@+id/chu" />

</LinearLayout>

package myapp.first.myapplication.adapter;

import android.content.Context;
import android.view.ViewGroup;
import android.widget.ImageView;

import com.bumptech.glide.Glide;

import java.util.List;

import myapp.first.myapplication.R;

/**
* @Author Xi
* Created by zz.wbkj.xi on 2016/8/15.
*/
public class RollViewPagerAdapter extends BasePagerAdapter<Integer> {

public RollViewPagerAdapter(Context context, List<Integer> dataList) {
super(context, dataList);
}

@Override
public Object instantiateItem(ViewGroup container, int position) {
ImageView imageView = new ImageView(mContext);
imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
imageView.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));
container.addView(imageView);
Glide.with(mContext)
.load(dataList.get(position))
//                .load(R.mipmap.ic_launcher)
//                .placeholder(R.mipmap.not_login_bg)
//                .error(R.mipmap.not_login_bg)
.into(imageView);
//        Glide.with(mContext).load(NetPath.BASE_IMG_PATH+dataList.get(position).getPath()).into(imageView);
//        LogUtils.e(mContext,"加载轮播图",position+"");
return imageView;
}
}

package myapp.first.myapplication.adapter;

import android.content.Context;
import android.support.v4.view.PagerAdapter;
import android.view.View;
import android.view.ViewGroup;

import java.util.List;

/**
* @Author Xi
* Created by zz.wbkj.xi on 2016/8/13.
*/
public abstract class BasePagerAdapter<T> extends PagerAdapter {

public Context mContext;
public List<T> dataList;

public BasePagerAdapter(Context context , List<T> dataList) {
this.mContext = context;
this.dataList = dataList;
}

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

@Override
public boolean isViewFromObject(View view, Object object) {
return view == object;
}
@Override
public abstract Object instantiateItem(ViewGroup container, int position) ;
@Override
public void destroyItem(ViewGroup container, int position, Object object) {
container.removeView((View) object);
}

}

package myapp.first.myapplication.tools;

import android.content.Context;

/**
* @Author Xi
* Created by zz.wbkj.xi on 2016/8/15.
*/
public class DensityUtil {

/**
* 根据手机的分辨率从 dp 的单位 转成为 px(像素)
*/
public static int dip2px(Context context, float dpValue) {
final float scale = context.getResources().getDisplayMetrics().density;
return (int) (dpValue * scale + 0.5f);
}

/**
* 根据手机的分辨率从 px(像素) 的单位 转成为 dp
*/
public static int px2dip(Context context, float pxValue) {
final float scale = context.getResources().getDisplayMetrics().density;
return (int) (pxValue / scale + 0.5f);
}
}

package myapp.first.myapplication.tools;

import android.content.Context;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;

import java.util.List;

import myapp.first.myapplication.R;
import myapp.first.myapplication.adapter.RollViewPagerAdapter;
import myapp.first.myapplication.listener.RollViewPagerOnPageChangeListener;
import myapp.first.myapplication.view.RollViewPager;

/**
* @Author Xi
* Created by zz.wbkj.xi on 2016/8/16.
*/
public class RollUtils {

private static LinearLayout.LayoutParams layoutParams;

/***
*  处理轮播点
* @param mContext
* @param rollList
* @param ll_point
* @param pointSelectorResourceId
* @param rollViewPager
*/
public static void dealPoint(Context mContext,List rollList, LinearLayout ll_point,  int pointSelectorResourceId, RollViewPager rollViewPager){
ll_point.removeAllViews();
if (rollList.size()!=0) {
for (int i = 0; i < rollList.size(); i++) {
ImageView point = new ImageView(mContext);
//                point.setBackgroundResource(R.drawable.point_selector);
point.setBackgroundResource(pointSelectorResourceId);
if (i == 0)
point.setEnabled(true);
else {
point.setEnabled(false);
}
if (layoutParams == null)
layoutParams = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
layoutParams.rightMargin = DensityUtil.dip2px(mContext, Float.valueOf(mContext.getResources().getString(R.string.point_margin)));
//            layoutParams.rightMargin = DensityUtil.px2dip(mContext,Float.valueOf(15));
ll_point.addView(point, layoutParams);
}
//            LogUtils.e(mContext, "添加指示点", "");
}
rollViewPager.addOnPageChangeListener(new RollViewPagerOnPageChangeListener(mContext,rollList,ll_point));
//        rollViewPager.setCurrentItem(0);
}

/***
*  处理数字
* @param mContext
* @param rollList
* @param tv_count_number
* @param tv_current_number
* @param rollViewPager
*/
public static void dealNumber(Context mContext,List rollList, TextView tv_count_number,TextView tv_current_number,  RollViewPager rollViewPager){
tv_count_number.setText(String.valueOf(rollList.size()));
rollViewPager.addOnPageChangeListener(new RollViewPagerOnPageChangeListener(mContext,rollList,tv_current_number));
}

}

package myapp.first.myapplication.listener;

import android.content.Context;
import android.support.v4.view.ViewPager;
import android.widget.LinearLayout;
import android.widget.TextView;

//import com.basedemo.my.xi.basedemo.utils.LogUtils;

import java.util.List;

/**
* @Author Xi
* Created by zz.wbkj.xi on 2016/8/16.
*/
public class RollViewPagerOnPageChangeListener implements ViewPager.OnPageChangeListener {

private Context mContext;
private LinearLayout ll_point;
private List rollList;
private int lastPosition ;
TextView tv_currentNumber;
boolean isPoint;
boolean isNumber;

public RollViewPagerOnPageChangeListener(Context context , List rollList, LinearLayout ll_point) {
this.mContext = context;
this.rollList = rollList;
this.ll_point = ll_point;
isPoint = true;
isNumber = false;
}

public RollViewPagerOnPageChangeListener(Context context , List rollList, TextView tv_currentNumber) {
this.mContext = context;
this.rollList = rollList;
this.tv_currentNumber = tv_currentNumber;
isNumber = true;
isPoint = false;
}

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

}

@Override
public void onPageSelected(int position) {
if (isPoint) {
if (rollList.size() != 0) {
position = position % rollList.size();
if (position != 0){
position = position -1;
}else {
position = rollList.size()-1;
}
ll_point.getChildAt(lastPosition).setEnabled(false);
ll_point.getChildAt(position).setEnabled(true);
lastPosition = position;
}
}else if (isNumber){
if (position > rollList.size()) {
position = 1;
} else if (position == 0) {
position = rollList.size();
}
tv_currentNumber.setText(String.valueOf(position));
}
}

@Override
public void onPageScrollStateChanged(int state) {

}
}

package myapp.first.myapplication.ui;

import android.view.LayoutInflater;
import android.view.View;
import android.widget.LinearLayout;
import android.widget.TextView;

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

import myapp.first.myapplication.R;
import myapp.first.myapplication.adapter.RollViewPagerAdapter;
import myapp.first.myapplication.base.MyBaseFragment;
import myapp.first.myapplication.tools.RollUtils;
import myapp.first.myapplication.view.RollViewPager;

/**
* Created by Administrator on 2016/10/7 0007.
*/

public class FragmentRbtn2 extends MyBaseFragment {

private LinearLayout ll_fragment2;

@Override
public void init() {

}

@Override
public int getLayoutResID() {
return R.layout.fragment_rbtn2;
}
List<Integer> list = new ArrayList<>();
@Override
public void initView(View view) {
ll_fragment2 = (LinearLayout) view.findViewById(R.id.ll_fragment2);
View rollView = LayoutInflater.from(mContext).inflate(R.layout.rollviewpager,null);
RollViewPager rollViewPager = (RollViewPager) rollView.findViewById(R.id.roll_viewpager);
LinearLayout ll_point = (LinearLayout) rollView.findViewById(R.id.ll_point);
//        TextView tv_current_number = (TextView) rollView.findViewById(R.id.tv_current_number);
//        TextView tv_count_number = (TextView) rollView.findViewById(R.id.tv_count_number);
ll_fragment2.addView(rollView);
list.clear();
list.add(R.mipmap.lambo);
list.add(R.mipmap.wheel);
list.add(R.mipmap.zhanweitu);
rollViewPager.setAdapter(new RollViewPagerAdapter(mContext,list));
RollUtils.dealPoint(mContext,list,ll_point,R.drawable.point_selector,rollViewPager);
//        RollUtils.dealNumber(mContext,list,tv_count_number,tv_current_number,rollViewPager);
}

@Override
public void initData() {

}

@Override
public void initListener() {

}
}

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_enabled="false" android:drawable="@mipmap/dian_off"/>
<item android:state_enabled="true" android:drawable="@mipmap/dian_on"/>
</selector>

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<corners android:radius="30dp"
/>
<solid android:color="#c6c7cc"
/>
<stroke android:width="0dp" android:color="#00000000"/>
</shape>