package com.example.nanchen.taketurnplaydemo;import android.support.v4.view.PagerAdapter;import android.view.View;import android.view.ViewGroup;import java.util.List;/** * Created by 南塵 on 2016/7/10. */public class GuidePageAdapter extends PagerAdapter { private List<View> viewList; public GuidePageAdapter(List<View> viewList) { this.viewList = viewList; } /** * @return 返回頁面的個(gè)數(shù) */ @Override public int getCount() { if (viewList != null){// return viewList.size(); //第一處修改，設(shè)置輪播最大值，等于無限循環(huán) return Integer.MAX_VALUE; } return 0; }  /** * 判斷對(duì)象是否生成界面 * @param view * @param object * @return */ @Override public boolean isViewFromObject(View view, Object object) { return view == object; }  /** * 初始化position位置的界面 * @param container * @param position * @return */ @Override public Object instantiateItem(ViewGroup container, int position) {  //第二處修改，當(dāng)前要顯示的數(shù)據(jù)索引為集合長度 int newPosition = position % viewList.size(); container.addView(viewList.get(newPosition)); return viewList.get(newPosition); // container.addView(viewList.get(position));// return viewList.get(position); } @Override public void destroyItem(ViewGroup container, int position, Object object) { //第三處修改，移除的索引為集合的長度 int newPosition = position % viewList.size(); container.removeView(viewList.get(newPosition));// container.removeView(viewList.get(position)); }}

package com.example.nanchen.taketurnplaydemo;import android.content.Intent;import android.os.Bundle;import android.support.v4.view.ViewPager;import android.support.v7.app.AppCompatActivity;import android.view.View;import android.view.ViewGroup;import android.view.Window;import android.widget.ImageButton;import android.widget.ImageView;import android.widget.LinearLayout; import java.util.ArrayList;import java.util.List; /** * 實(shí)現(xiàn)首次啟動(dòng)的引導(dǎo)頁面 */public class GuideActivity extends AppCompatActivity implements ViewPager.OnPageChangeListener{  private ViewPager vp; private int []imageIdArray;//圖片資源的數(shù)組 private List<View> viewList;//圖片資源的集合 private ViewGroup vg;//放置圓點(diǎn) //實(shí)例化原點(diǎn)View private ImageView iv_point; private ImageView []ivPointArray; private boolean isLooper;  //最后一頁的按鈕 private ImageButton ib_start; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); supportRequestWindowFeature(Window.FEATURE_NO_TITLE); setContentView(R.layout.activity_guide); ib_start = (ImageButton) findViewById(R.id.guide_ib_start); ib_start.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { startActivity(new Intent(GuideActivity.this,MainActivity.class)); finish(); } }); //加載ViewPager initViewPager(); //加載底部圓點(diǎn) initPoint(); //修改添加設(shè)置ViewPager的當(dāng)前頁，為了保證左右輪播 vp.setCurrentItem(5000000); //開啟一個(gè)線程，用于循環(huán) new Thread(new Runnable() { @Override public void run() { isLooper = true; while (isLooper){  try {  Thread.sleep(2000);  } catch (InterruptedException e) {  e.printStackTrace();  }  runOnUiThread(new Runnable() {  @Override  public void run() {  //這里是設(shè)置當(dāng)前頁的下一頁  vp.setCurrentItem(vp.getCurrentItem() + 1);  }  }); } } }).start(); }  /** * 加載底部圓點(diǎn) */ private void initPoint() { //這里實(shí)例化LinearLayout vg = (ViewGroup) findViewById(R.id.guide_ll_point); //根據(jù)ViewPager的item數(shù)量實(shí)例化數(shù)組 ivPointArray = new ImageView[viewList.size()]; //循環(huán)新建底部圓點(diǎn)ImageView，將生成的ImageView保存到數(shù)組中 int size = viewList.size(); for (int i = 0;i<size;i++){ iv_point = new ImageView(this); iv_point.setLayoutParams(new ViewGroup.LayoutParams(20,20)); iv_point.setPadding(30,0,30,0);//left,top,right,bottom ivPointArray[i] = iv_point; //第一個(gè)頁面需要設(shè)置為選中狀態(tài)，這里采用兩張不同的圖片 if (i == 0){ iv_point.setBackgroundResource(R.mipmap.full_holo); }else{ iv_point.setBackgroundResource(R.mipmap.empty_holo); } //將數(shù)組中的ImageView加入到ViewGroup vg.addView(ivPointArray[i]); } } /** * 加載圖片ViewPager */ private void initViewPager() { vp = (ViewPager) findViewById(R.id.guide_vp); //實(shí)例化圖片資源 imageIdArray = new int[]{R.mipmap.guide1,R.mipmap.guide2,R.mipmap.guide3}; viewList = new ArrayList<>(); //獲取一個(gè)Layout參數(shù)，設(shè)置為全屏 LinearLayout.LayoutParams params = new LinearLayout.LayoutParams( LinearLayout.LayoutParams.MATCH_PARENT,LinearLayout.LayoutParams.MATCH_PARENT); //循環(huán)創(chuàng)建View并加入到集合中 int len = imageIdArray.length; for (int i = 0;i<len;i++){ //new ImageView并設(shè)置全屏和圖片資源 ImageView imageView = new ImageView(this); imageView.setLayoutParams(params); imageView.setBackgroundResource(imageIdArray[i]);  //將ImageView加入到集合中 viewList.add(imageView); } //View集合初始化好后，設(shè)置Adapter vp.setAdapter(new GuidePageAdapter(viewList)); //設(shè)置滑動(dòng)監(jiān)聽 vp.setOnPageChangeListener(this); } @Override public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {  } /** * 滑動(dòng)后的監(jiān)聽 * @param position */ @Override public void onPageSelected(int position) { //修改全部的position長度 int newPosition = position % viewList.size(); //循環(huán)設(shè)置當(dāng)前頁的標(biāo)記圖 int length = imageIdArray.length; for (int i = 0;i<length;i++){ ivPointArray[newPosition].setBackgroundResource(R.mipmap.full_holo); if (newPosition != i){ ivPointArray[i].setBackgroundResource(R.mipmap.empty_holo); } } // //循環(huán)設(shè)置當(dāng)前頁的標(biāo)記圖// int length = imageIdArray.length;// for (int i = 0;i<length;i++){// ivPointArray[position].setBackgroundResource(R.mipmap.full_holo);// if (position != i){// ivPointArray[i].setBackgroundResource(R.mipmap.empty_holo);// }// } //判斷是否是最后一頁，若是則顯示按鈕// if (position == imageIdArray.length - 1){// ib_start.setVisibility(View.VISIBLE);// }else {// ib_start.setVisibility(View.GONE);// } } @Override public void onPageScrollStateChanged(int state) {}}

<?xml version="1.0" encoding="utf-8"?><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" tools:context=".GuideActivity"> <RelativeLayout android:layout_width="match_parent" android:layout_height="200dp"> <android.support.v4.view.ViewPager android:id="@+id/guide_vp" android:layout_width="match_parent" android:layout_height="match_parent"> </android.support.v4.view.ViewPager> <LinearLayout android:id="@+id/guide_ll_point" android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal" android:layout_alignParentBottom="true" android:paddingBottom="10dp" android:gravity="center_horizontal"> </LinearLayout>  <ImageButton android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/guide_ib_start" android:src="@mipmap/btn_start" android:layout_centerHorizontal="true" android:layout_above="@+id/guide_ll_point" android:background="@null" android:visibility="gone"/> </RelativeLayout> </RelativeLayout>