上下拉刷新 轮播图 listview
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activity_main
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" tools:context="zhanghaijiao.bawei.com.day10_demo3.MainActivity"> <!--只能有一个子孩子 --> <com.handmark.pulltorefresh.library.PullToRefreshScrollView android:layout_width="match_parent" android:layout_height="match_parent" android:id="@+id/psv"> <LinearLayout android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical"> <FrameLayout android:layout_width="match_parent" android:layout_height="wrap_content"> <!--轮播图--> <android.support.v4.view.ViewPager android:layout_width="match_parent" android:layout_height="200dp" android:id="@+id/vp"></android.support.v4.view.ViewPager> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:id="@+id/lin_point" android:orientation="horizontal" android:gravity="center" android:layout_gravity="bottom"></LinearLayout> </FrameLayout> <!--listview--> <!--<ListView--> <!--android:layout_width="match_parent"--> <!--android:layout_height="match_parent"--> <!--android:id="@+id/lv"></ListView>--> <zhanghaijiao.bawei.com.day10_demo3.MyListView android:layout_width="match_parent" android:layout_height="match_parent" android:id="@+id/lv"></zhanghaijiao.bawei.com.day10_demo3.MyListView> </LinearLayout> </com.handmark.pulltorefresh.library.PullToRefreshScrollView> </LinearLayout>
main_activity
package zhanghaijiao.bawei.com.day10_demo3; import android.os.AsyncTask; import android.os.Handler; import android.os.Message; import android.support.v4.view.ViewPager; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.widget.ImageView; import android.widget.LinearLayout; import android.widget.ListView; import android.widget.ScrollView; import com.google.gson.Gson; import com.handmark.pulltorefresh.library.PullToRefreshBase; import com.handmark.pulltorefresh.library.PullToRefreshScrollView; import java.io.BufferedReader; import java.io.InputStream; import java.io.InputStreamReader; import java.net.HttpURLConnection; import java.net.URL; import java.util.ArrayList; import java.util.List; public class MainActivity extends AppCompatActivity { private PullToRefreshScrollView psv; private int pageIndex=1; private int operType=1;//1:刷新 2：加载更多 private String myurl="http://365jia.cn/news/api3/365jia/news/headline?page="+pageIndex; private List<ResultData.DataBeanX.DataBean> datas=new ArrayList<>(); private ListViewAdapter adapter; private ListView listView; private ViewPager viewPager; private List<String> imgUrls=new ArrayList<>(); private LinearLayout linPoint; private List<ImageView> lists=new ArrayList<>(); private Handler mHandler=new Handler(){ @Override public void handleMessage(Message msg) { super.handleMessage(msg); int cIndex=viewPager.getCurrentItem(); cIndex++; viewPager.setCurrentItem(cIndex); //改变指示器 setSelectedPoint(cIndex%lists.size()); sendEmptyMessageDelayed(0,1000); } }; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); psv = findViewById(R.id.psv); listView = findViewById(R.id.lv); viewPager = findViewById(R.id.vp); linPoint = findViewById(R.id.lin_point); //初使化 pullToRefreshScrollView initPsv(); //请求网络数据 requestNetData(); } private void requestNetData() { new MyTask().execute(myurl); } class MyTask extends AsyncTask<String,Void,String> { @Override protected String doInBackground(String... strings) { try { URL url=new URL(strings[0]); HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection(); urlConnection.setRequestMethod("GET"); urlConnection.setReadTimeout(5000); urlConnection.setConnectTimeout(5000); if(urlConnection.getResponseCode()==200){ InputStream inputStream = urlConnection.getInputStream(); String s = streamToString(inputStream); return s; } } catch (Exception e) { e.printStackTrace(); } return null; } @Override protected void onPostExecute(String s) { super.onPostExecute(s); Gson gson=new Gson(); ResultData resultData = gson.fromJson(s, ResultData.class); //新请求下来的数据 List<ResultData.DataBeanX.DataBean> data = resultData.getData().getData(); //展示轮播图 showPics(data); if(operType==1){ datas.clear();//清空 } datas.addAll(data); setAdapter(); //关闭头尾布局 psv.onRefreshComplete(); } } private void showPics(List<ResultData.DataBeanX.DataBean> data) { imgUrls.clear(); //为轮播图添加地址 imgUrls.add("http://365jia.cn/uploads/"+data.get(0).getPics().get(0)); imgUrls.add("http://365jia.cn/uploads/"+data.get(1).getPics().get(0)); imgUrls.add("http://365jia.cn/uploads/"+data.get(2).getPics().get(0)); MyVpAdapter adapter=new MyVpAdapter(imgUrls,MainActivity.this); viewPager.setAdapter(adapter); //初使化指示器 initPoint(); //发送消息，实现自动轮播 mHandler.sendEmptyMessageDelayed(0,1000); } //设置选中的小圆点 private void setSelectedPoint(int pageIndex){ for (int i = 0; i <lists.size() ; i++) { if(i==pageIndex){ lists.get(i).setImageResource(R.drawable.point_selected); }else { lists.get(i).setImageResource(R.drawable.point_unselected); } } } private void initPoint() { for (int i = 0; i <imgUrls.size() ; i++) { ImageView imageView=new ImageView(this); //设置它的布局参数 LinearLayout.LayoutParams params=new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT,LinearLayout.LayoutParams.WRAP_CONTENT); params.setMargins(0,0,10,0);//设置右边的间隔 if(i==0){ imageView.setImageResource(R.drawable.point_selected);//选中的小圆点 }else{ imageView.setImageResource(R.drawable.point_unselected); } linPoint.addView(imageView,params); lists.add(imageView); } } public void setAdapter(){ if (adapter == null) { adapter = new ListViewAdapter(datas,MainActivity.this); listView.setAdapter(adapter); }else { adapter.notifyDataSetChanged(); } } /** * 将流转换成String * @param stream */ private String streamToString(InputStream stream) { StringBuilder sbuilder=new StringBuilder(); String str; BufferedReader reader=new BufferedReader(new InputStreamReader(stream)); try { while ((str=reader.readLine())!=null){ sbuilder.append(str); } } catch (Exception e) { e.printStackTrace(); } return sbuilder.toString(); } private void initPsv() { //1.设置模式 psv.setMode(PullToRefreshBase.Mode.BOTH); //2.设置监听 psv.setOnRefreshListener(new PullToRefreshBase.OnRefreshListener2<ScrollView>() { @Override public void onPullDownToRefresh(PullToRefreshBase<ScrollView> pullToRefreshBase) { //刷新回调 operType=1; pageIndex=1; myurl="http://365jia.cn/news/api3/365jia/news/headline?page="+pageIndex; requestNetData(); } @Override public void onPullUpToRefresh(PullToRefreshBase<ScrollView> pullToRefreshBase) { //加载回调 operType=2; pageIndex++; myurl="http://365jia.cn/news/api3/365jia/news/headline?page="+pageIndex; requestNetData(); } }); } }
ResultData
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String getType() { return type; } public void setType(String type) { this.type = type; } public String getType_sign() { return type_sign; } public void setType_sign(String type_sign) { this.type_sign = type_sign; } } } public static class DataBean { /** * id : 3524385 * title : 合肥城市总体规划编制大调研工作启动 今年12月完成总规纲要初步成果 * link : lsapp://cn.ahurls.news/news?id=3524385 * pics : ["appletrecommend/201804/5ade91c99a715.jpg"] * t : url * type : normal * alias : headline * pic_amount : 0 * style : single_right * comment_amount : 0 * source : * type_sign : * inner_news : 1 * views : 394 * comment_amount_label : 0 * views_label : 394 * pics_new : ["special/tuku/201804/5add9971130ea73397.jpg"] */ private int id; private String title; private String link; private String t; private String type; private String alias; private int pic_amount; private String style; private int comment_amount; private String source; private String type_sign; private int inner_news; private int views; private String comment_amount_label; private String views_label; private List<String> pics; private List<String> pics_new; public int getId() { return id; } public void setId(int id) { this.id = id; } public String getTitle() { return title; } public void setTitle(String title) { this.title = title; } public String getLink() { return link; } public void setLink(String link) { this.link = link; } public String getT() { return t; } public void setT(String t) { this.t = t; } public String getType() { return type; } public void setType(String type) { this.type = type; } public String getAlias() { return alias; } public void setAlias(String alias) { this.alias = alias; } public int getPic_amount() { return pic_amount; } public void setPic_amount(int pic_amount) { this.pic_amount = pic_amount; } public String getStyle() { return style; } public void setStyle(String style) { this.style = style; } public int getComment_amount() { return comment_amount; } public void setComment_amount(int comment_amount) { this.comment_amount = comment_amount; } public String getSource() { return source; } public void setSource(String source) { this.source = source; } public String getType_sign() { return type_sign; } public void setType_sign(String type_sign) { this.type_sign = type_sign; } public int getInner_news() { return inner_news; } public void setInner_news(int inner_news) { this.inner_news = inner_news; } public int getViews() { return views; } public void setViews(int views) { this.views = views; } public String getComment_amount_label() { return comment_amount_label; } public void setComment_amount_label(String comment_amount_label) { this.comment_amount_label = comment_amount_label; } public String getViews_label() { return views_label; } public void setViews_label(String views_label) { this.views_label = views_label; } public List<String> getPics() { return pics; } public void setPics(List<String> pics) { this.pics = pics; } public List<String> getPics_new() { return pics_new; } public void setPics_new(List<String> pics_new) { this.pics_new = pics_new; } } }
ListViewAdapter
package zhanghaijiao.bawei.com.day10_demo3; import android.os.AsyncTask; import android.os.Handler; import android.os.Message; import android.support.v4.view.ViewPager; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.widget.ImageView; import android.widget.LinearLayout; import android.widget.ListView; import android.widget.ScrollView; import com.google.gson.Gson; import com.handmark.pulltorefresh.library.PullToRefreshBase; import com.handmark.pulltorefresh.library.PullToRefreshScrollView; import java.io.BufferedReader; import java.io.InputStream; import java.io.InputStreamReader; import java.net.HttpURLConnection; import java.net.URL; import java.util.ArrayList; import java.util.List; public class MainActivity extends AppCompatActivity { private PullToRefreshScrollView psv; private int pageIndex=1; private int operType=1;//1:刷新 2：加载更多 private String myurl="http://365jia.cn/news/api3/365jia/news/headline?page="+pageIndex; private List<ResultData.DataBeanX.DataBean> datas=new ArrayList<>(); private ListViewAdapter adapter; private ListView listView; private ViewPager viewPager; private List<String> imgUrls=new ArrayList<>(); private LinearLayout linPoint; private List<ImageView> lists=new ArrayList<>(); private Handler mHandler=new Handler(){ @Override public void handleMessage(Message msg) { super.handleMessage(msg); int cIndex=viewPager.getCurrentItem(); cIndex++; viewPager.setCurrentItem(cIndex); //改变指示器 setSelectedPoint(cIndex%lists.size()); sendEmptyMessageDelayed(0,1000); } }; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); psv = findViewById(R.id.psv); listView = findViewById(R.id.lv); viewPager = findViewById(R.id.vp); linPoint = findViewById(R.id.lin_point); //初使化 pullToRefreshScrollView initPsv(); //请求网络数据 requestNetData(); } private void requestNetData() { new MyTask().execute(myurl); } class MyTask extends AsyncTask<String,Void,String> { @Override protected String doInBackground(String... strings) { try { URL url=new URL(strings[0]); HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection(); urlConnection.setRequestMethod("GET"); urlConnection.setReadTimeout(5000); urlConnection.setConnectTimeout(5000); if(urlConnection.getResponseCode()==200){ InputStream inputStream = urlConnection.getInputStream(); String s = streamToString(inputStream); return s; } } catch (Exception e) { e.printStackTrace(); } return null; } @Override protected void onPostExecute(String s) { super.onPostExecute(s); Gson gson=new Gson(); ResultData resultData = gson.fromJson(s, ResultData.class); //新请求下来的数据 List<ResultData.DataBeanX.DataBean> data = resultData.getData().getData(); //展示轮播图 showPics(data); if(operType==1){ datas.clear();//清空 } datas.addAll(data); setAdapter(); //关闭头尾布局 psv.onRefreshComplete(); } } private void showPics(List<ResultData.DataBeanX.DataBean> data) { imgUrls.clear(); //为轮播图添加地址 imgUrls.add("http://365jia.cn/uploads/"+data.get(0).getPics().get(0)); imgUrls.add("http://365jia.cn/uploads/"+data.get(1).getPics().get(0)); imgUrls.add("http://365jia.cn/uploads/"+data.get(2).getPics().get(0)); MyVpAdapter adapter=new MyVpAdapter(imgUrls,MainActivity.this); viewPager.setAdapter(adapter); //初使化指示器 initPoint(); //发送消息，实现自动轮播 mHandler.sendEmptyMessageDelayed(0,1000); } //设置选中的小圆点 private void setSelectedPoint(int pageIndex){ for (int i = 0; i <lists.size() ; i++) { if(i==pageIndex){ lists.get(i).setImageResource(R.drawable.point_selected); }else { lists.get(i).setImageResource(R.drawable.point_unselected); } } } private void initPoint() { for (int i = 0; i <imgUrls.size() ; i++) { ImageView imageView=new ImageView(this); //设置它的布局参数 LinearLayout.LayoutParams params=new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT,LinearLayout.LayoutParams.WRAP_CONTENT); params.setMargins(0,0,10,0);//设置右边的间隔 if(i==0){ imageView.setImageResource(R.drawable.point_selected);//选中的小圆点 }else{ imageView.setImageResource(R.drawable.point_unselected); } linPoint.addView(imageView,params); lists.add(imageView); } } public void setAdapter(){ if (adapter == null) { adapter = new ListViewAdapter(datas,MainActivity.this); listView.setAdapter(adapter); }else { adapter.notifyDataSetChanged(); } } /** * 将流转换成String * @param stream */ private String streamToString(InputStream stream) { StringBuilder sbuilder=new StringBuilder(); String str; BufferedReader reader=new BufferedReader(new InputStreamReader(stream)); try { while ((str=reader.readLine())!=null){ sbuilder.append(str); } } catch (Exception e) { e.printStackTrace(); } return sbuilder.toString(); } private void initPsv() { //1.设置模式 psv.setMode(PullToRefreshBase.Mode.BOTH); //2.设置监听 psv.setOnRefreshListener(new PullToRefreshBase.OnRefreshListener2<ScrollView>() { @Override public void onPullDownToRefresh(PullToRefreshBase<ScrollView> pullToRefreshBase) { //刷新回调 operType=1; pageIndex=1; myurl="http://365jia.cn/news/api3/365jia/news/headline?page="+pageIndex; requestNetData(); } @Override public void onPullUpToRefresh(PullToRefreshBase<ScrollView> pullToRefreshBase) { //加载回调 operType=2; pageIndex++; myurl="http://365jia.cn/news/api3/365jia/news/headline?page="+pageIndex; requestNetData(); } }); } }
MyListView
package zhanghaijiao.bawei.com.day10_demo3; import android.content.Context; import android.util.AttributeSet; import android.widget.ListView; /** * Created by jane on 2018/4/24. */ public class MyListView extends ListView { public MyListView(Context context) { super(context); } public MyListView(Context context, AttributeSet attrs) { super(context, attrs); } //测量 @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { //重新计算高度 int newHeight=MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE>>2,MeasureSpec.AT_MOST); super.onMeasure(widthMeasureSpec, newHeight); } }
MyVpAdapter
package zhanghaijiao.bawei.com.day10_demo3; import android.content.Context; import android.graphics.Bitmap; import android.support.v4.view.PagerAdapter; import android.view.View; import android.view.ViewGroup; import android.widget.ImageView; import com.nostra13.universalimageloader.core.DisplayImageOptions; import com.nostra13.universalimageloader.core.ImageLoader; import com.nostra13.universalimageloader.core.assist.ImageScaleType; import java.util.List; /** * Created by jane on 2018/4/24. */ public class MyVpAdapter extends PagerAdapter { //数据源 private List<String> urls; //上下文对象 private Context context; private DisplayImageOptions options; public MyVpAdapter(List<String> urls, Context context) { this.urls = urls; this.context = context; this.options=new DisplayImageOptions.Builder() .cacheInMemory(true)//使用内存缓存 .cacheOnDisk(true)//使用磁盘缓存 .showImageOnLoading(R.mipmap.ic_launcher)//设置正在下载的图片 .showImageForEmptyUri(R.mipmap.ic_launcher)//url为空或请求的资源不存在时 .showImageOnFail(R.mipmap.ic_launcher)//下载失败时显示的图片 .bitmapConfig(Bitmap.Config.RGB_565)//设置图片色彩模式 1px=2个字节 ARGB_8888 1px=4个字节 ARGB_4444 1px=2个字节 ALPHA_8 1px=1个字节 .imageScaleType(ImageScaleType.EXACTLY)//设置图片的缩放模式 .build(); } @Override public int getCount() { return Integer.MAX_VALUE; } @Override public boolean isViewFromObject(View view, Object object) { return view==object; } @Override public Object instantiateItem(ViewGroup container, int position) { ImageView imageView=new ImageView(context); //下载图片 ImageLoader.getInstance().displayImage(urls.get(position%urls.size()),imageView,options); container.addView(imageView); return imageView; } @Override public void destroyItem(ViewGroup container, int position, Object object) { //super.destroyItem(container, position, object); container.removeView((View)object); } }
MyApplication
package zhanghaijiao.bawei.com.day10_demo3; import android.app.Application; import android.os.Environment; import com.nostra13.universalimageloader.cache.disc.impl.UnlimitedDiscCache; import com.nostra13.universalimageloader.cache.disc.naming.Md5FileNameGenerator; import com.nostra13.universalimageloader.core.ImageLoader; import com.nostra13.universalimageloader.core.ImageLoaderConfiguration; import java.io.File; /** * Created by jane on 2018/4/17. */ public class MyApplication extends Application { @Override public void onCreate() { super.onCreate(); //自定义图片的缓存路径 File cachefile=new File( Environment.getExternalStorageDirectory().getPath()+"/abc"); ImageLoaderConfiguration configuration=new ImageLoaderConfiguration.Builder(this) .memoryCacheExtraOptions(480, 800)//缓存图片最大的长和宽 .threadPoolSize(2)//线程池的数量 .threadPriority(4) .memoryCacheSize(2*1024*1024)//设置内存缓存区大小 .diskCacheSize(20*1024*1024)//设置sd卡缓存区大小 .diskCache(new UnlimitedDiscCache(cachefile))//自定义缓存目录 .writeDebugLogs()//打印日志内容 .diskCacheFileNameGenerator(new Md5FileNameGenerator())//给缓存的文件名进行md5加密处理 .build(); ImageLoader.getInstance().init(configuration); } }
item
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/tv" /> </RelativeLayout>
pull
compile ‘com.github.userswlwork:pull-to-refresh:1.0.0‘
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