由andriod Studio开发的一款大学生兼职招聘App

package com.uitest.administrator.shoulderby.fragment; import android.app.Fragment; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.support.annotation.Nullable; import android.support.v4.view.PagerAdapter; import android.support.v4.view.ViewPager; import android.view.LayoutInflater; import android.view.MotionEvent; import android.view.View; import android.view.ViewGroup; import android.widget.ImageView; import android.widget.RadioGroup; import android.widget.TextView; import com.uitest.administrator.shoulderby.R; import java.util.ArrayList; import java.util.List; import java.util.Timer; import java.util.TimerTask; import butterknife.Bind; import butterknife.ButterKnife; /** * 主页 * Created by Administrator on 2017/12/6 0006. */ public class HomeFragment extends Fragment { @Bind(R.id.tv_common_title) TextView tvCommonTitle; @Bind(R.id.vp_home) ViewPager vpHome; @Bind(R.id.group) RadioGroup group; @Bind(R.id.iv_home_icon1) ImageView ivHomeIcon1; @Bind(R.id.tv_home_icon1) TextView tvHomeIcon1; @Bind(R.id.iv_home_icon2) ImageView ivHomeIcon2; @Bind(R.id.tv_home_icon2) TextView tvHomeIcon2; @Bind(R.id.iv_home_icon3) ImageView ivHomeIcon3; @Bind(R.id.tv_home_icon3) TextView tvHomeIcon3; @Bind(R.id.iv_home_icon4) ImageView ivHomeIcon4; @Bind(R.id.tv_home_icon4) TextView tvHomeIcon4; @Bind(R.id.iv_home_bigshow) ImageView ivHomeBigshow; @Bind(R.id.tv_home_hot) TextView tvHomeHot; @Bind(R.id.iv_home_hot1) ImageView ivHomeHot1; @Bind(R.id.iv_home_hot2) ImageView ivHomeHot2; @Bind(R.id.iv_home_hot3) ImageView ivHomeHot3; //图片资源 private int[] imageIds = {R.drawable.pic_home_longterm, R.drawable.pic_home_quickly, R.drawable.pic_home_shortterm}; //存放图片的数组 private List<ImageView> mList; //当前索引位置以及上一个索引位置 private int index = 0, preIndex = 0; //是否需要轮播标志 private boolean isContinue = true; //定时器，用于实现轮播 private Timer timer; protected Handler mHandler = new Handler() { @Override public void handleMessage(Message msg) { super.handleMessage(msg); if (getActivity() != null) { switch (msg.what) { case 1: index++; System.out.println("==========index: " + index); vpHome.setCurrentItem(index); } } } }; @Override public void onDestroy() { super.onDestroy(); mHandler.removeCallbacksAndMessages(null); } @Nullable @Override public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, Bundle savedInstanceState) { View view = View.inflate(getActivity(), R.layout.fragment_home, null); ButterKnife.bind(this, view); initTitle(); mList = new ArrayList<>(); vpHome.setAdapter(pagerAdapter); vpHome.addOnPageChangeListener(onPageChangeListener); vpHome.setOnTouchListener(onTouchListener); initRadioButton(imageIds.length); intiTimer(); //初始化timer 定时器 return view; } private void intiTimer() { timer = new Timer();//创建Timer对象 if (getActivity() == null) { timer.cancel(); } else { //执行定时任务 timer.schedule(new TimerTask() { @Override public void run() { //首先判断是否需要轮播，是的话我们才发消息 if (isContinue) { mHandler.sendEmptyMessage(1); } } }, 3000, 3000);//延迟2秒，每隔2秒发一次消息 } } public void initTitle() { tvCommonTitle.setText("首页"); } @Override public void onDestroyView() { super.onDestroyView(); ButterKnife.unbind(this); } /** * 根据图片个数初始化按钮 * * @param length */ private void initRadioButton(int length) { for (int i = 0; i < length; i++) { ImageView imageview = new ImageView(getActivity()); imageview.setImageResource(R.drawable.rg_selector);//设置背景选择器 imageview.setPadding(20, 0, 0, 0);//设置每个按钮之间的间距 //将按钮依次添加到RadioGroup中 group.addView(imageview, ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); //默认选中第一个按钮，因为默认显示第一张图片 group.getChildAt(0).setEnabled(false); } } /** * 根据当前触摸事件判断是否要轮播 */ View.OnTouchListener onTouchListener = new View.OnTouchListener() { @Override public boolean onTouch(View v, MotionEvent event) { switch (event.getAction()) { //手指按下和划动的时候停止图片的轮播 case MotionEvent.ACTION_DOWN: case MotionEvent.ACTION_MOVE: isContinue = false; break; default: isContinue = true; } return false; } }; /** * 根据当前选中的页面设置按钮的选中 */ ViewPager.OnPageChangeListener onPageChangeListener = new ViewPager.OnPageChangeListener() { @Override public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) { } @Override public void onPageSelected(int position) { index = position;//当前位置赋值给索引 setCurrentDot(index % imageIds.length); } @Override public void onPageScrollStateChanged(int state) { } }; /** * 设置对应位置按钮的状态 * * @param i 当前位置 */ private void setCurrentDot(int i) { if (group.getChildAt(i) != null) { group.getChildAt(i).setEnabled(false);//当前按钮选中 } if (group.getChildAt(preIndex) != null) { group.getChildAt(preIndex).setEnabled(true);//上一个取消选中 preIndex = i;//当前位置变为上一个，继续下次轮播 } } PagerAdapter pagerAdapter = new PagerAdapter() { @Override public int getCount() { //返回一个比较大的值，目的是为了实现无限轮播 return Integer.MAX_VALUE; } @Override public boolean isViewFromObject(View view, Object object) { return view == object; } @Override public Object instantiateItem(ViewGroup container, int position) { position = position % imageIds.length; ImageView imageView = new ImageView(getActivity()); imageView.setImageResource(imageIds[position]); imageView.setScaleType(ImageView.ScaleType.FIT_XY); container.addView(imageView); mList.add(imageView); return imageView; } @Override public void destroyItem(ViewGroup container, int position, Object object) { container.removeView(mList.get(position)); } }; }