package com.demo.cyq;

import android.os.Handler;
import android.os.Message;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.Toolbar;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {
    private Toolbar toolbar;
    private ViewPager viewPage;
    private TextView imgDescription;
    private ArrayList images;
    private LinearLayout ll_point_group;
    private int[] imgesId = {R.mipmap.banner1, R.mipmap.banner2, R.mipmap.banner3, R.mipmap.banner4};
    private String[] imgDescriptions = {"Facebooks Audience Network", "新一代Mac Pro发布", "全国大学生珠三角论坛", "Maple 2016"};
    private int presentPostion = 0;
    private final int OPTION_TYPE_AUTO = 1, OPTION_TYPE_POINT = 2;
    private static int pointClickPosition = 0; //point点击的位置
    private boolean isDraging = false;
    private Handler handler = new Handler() {
        @Override
        public void handleMessage(Message msg) {

            int option = msg.what;
            switch (option) {
                case OPTION_TYPE_AUTO: //option==1执行viewPage跳转到下一个
                    int currentPostion = viewPage.getCurrentItem();//获得当前的ViewPage位置
                    viewPage.setCurrentItem(++currentPostion, true);
                    handler.sendEmptyMessageDelayed(OPTION_TYPE_AUTO, 3000);//回调handler 实现自动轮播
                    break;
                case OPTION_TYPE_POINT:
                    //重新设置Adapter 这个地方不设置就会报如下错误 很诡异：
                    // The specified child already has a parent. You must call removeView() on the child's parent first
                    int currentPostion2 = viewPage.getCurrentItem();//获得当前的ViewPage位置
                    viewPage.setAdapter(new MyViewPageAdapter());
                    viewPage.setCurrentItem(currentPostion2 - currentPostion2 % images.size() + pointClickPosition, true);
                    handler.sendEmptyMessageDelayed(OPTION_TYPE_AUTO, 3000);//回调handler 实现自动轮播
                    break;
            }
        }
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        toolbar = (Toolbar) findViewById(R.id.toobar);
        toolbar.setTitle("ViewPage实现图片轮播");
        setSupportActionBar(toolbar);

        viewPage = (ViewPager) findViewById(R.id.viewPage);
        ll_point_group = (LinearLayout) findViewById(R.id.ll_point_group);
        imgDescription = (TextView) findViewById(R.id.imgDescr