依赖
implementation 'com.github.userswlwork:pull-to-refresh:1.0.0'
implementation 'com.google.code.gson:gson:2.8.5'
implementation 'com.android.support:design:28+'
implementation 'com.nostra13.universalimageloader:universal-image-loader:1.9.5'
清单文件
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.INTERNET"></uses-permission>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"></uses-permission>
MainActivity
package com.bw.zsd.day11;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.View;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.RadioGroup;
import android.widget.Toast;
import com.bw.zsd.MyApp;
import com.bw.zsd.adapter.MyAdapterLayout;
import com.bw.zsd.bean.JsonDrawble;
import com.bw.zsd.frag.Frag0;
import com.bw.zsd.frag.Frag1;
import com.bw.zsd.frag.Frag2;
import com.bw.zsd.task.MyAsyncTask;
import com.bw.zsd.task.MyAsyncTaskBitmap;
import com.bw.zsd.task.MyAsyncTaskLayout;
import com.bw.zsd.utils.NetWordUtils;
import com.handmark.pulltorefresh.library.PullToRefreshBase;
import com.handmark.pulltorefresh.library.PullToRefreshListView;
import com.nostra13.universalimageloader.core.DisplayImageOptions;
import com.nostra13.universalimageloader.core.ImageLoader;
import java.util.ArrayList;
import static android.icu.text.Normalizer.YES;
public class MainActivity extends FragmentActivity {
private int page;
private ViewPager viewPager;
private String urlBitmap = "http://image.baidu.com/search/down?tn=download&word=download&ie=utf8&fr=detail&url=http%3A%2F%2Fimg5.duitang.com%2Fuploads%2Fitem%2F201410%2F05%2F20141005082835_2RTzn.thumb.700_0.jpeg&thumburl=http%3A%2F%2Fimg2.imgtn.bdimg.com%2Fit%2Fu%3D3846895839%2C2711067435%26fm%3D26%26gp%3D0.jpg";
private RadioGroup radioGroup;
private ArrayList<Fragment> list = new ArrayList<>();
private ArrayList<JsonDrawble.DataBean> Jsonlist = new ArrayList<>();
private String urlString = "http://api.expoon.com/AppNews/getNewsList/type/1/p/1";
private MyAdapterLayout adapterLayout;
private PullToRefreshListView pullToRefreshListView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ImageView imageView = findViewById(R.id.image2);
DisplayImageOptions options = MyApp.getDisplayImageOptions2();
InitListView();
ImageLoader.getInstance().displayImage(urlBitmap,imageView,options);
viewPager = findViewById(R.id.ViewPager1);
radioGroup = findViewById(R.id.RadioGroup1);
list.add(new Frag0());
list.add(new Frag1());
list.add(new Frag2());
radioGroup.check(radioGroup.getChildAt(0).getId());
viewPager.setAdapter(new FragmentPagerAdapter(getSupportFragmentManager()) {
@Override
public Fragment getItem(int i) {
return list.get(i);
}
@Override
public int getCount() {
return list.size();
}
});
viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
@Override
public void onPageScrolled(int i, float v, int i1) {
}
@Override
public void onPageSelected(int i) {
radioGroup.check(radioGroup.getChildAt(i).getId());
}
@Override
public void onPageScrollStateChanged(int i) {
}
});
radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
switch (checkedId){
case R.id.radio0: viewPager.setCurrentItem(0);break;
case R.id.radio1: viewPager.setCurrentItem(1);break;
case R.id.radio2: viewPager.setCurrentItem(2);break;
}
}
});
}
private void InitListView() {
pullToRefreshListView = findViewById(R.id.pulldrwable);
pullToRefreshListView.setMode(PullToRefreshListView.Mode.BOTH);//上下啦
initData(page);
pullToRefreshListView.setOnRefreshListener(new PullToRefreshBase.OnRefreshListener2<ListView>() {
@Override
public void onPullDownToRefresh(PullToRefreshBase<ListView> pullToRefreshBase) {
Jsonlist.clear();
initData(page);
}
@Override
public void onPullUpToRefresh(PullToRefreshBase<ListView> pullToRefreshBase) {
page++;
initData(page);
}
});
}
private void initData(int page) {
adapterLayout = new MyAdapterLayout(Jsonlist, MainActivity.this);
pullToRefreshListView.setAdapter(adapterLayout);
String s = urlString+page;
boolean connection = NetWordUtils.isConnection(MainActivity.this);
if (connection) {
new MyAsyncTaskLayout(Jsonlist,pullToRefreshListView,adapterLayout).execute(s);
} else {
Toast.makeText(this, "请链接网络", Toast.LENGTH_SHORT).show();
}
}
}
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:background="#fff"
android:layout_height="match_parent"
tools:context=".MainActivity">
<LinearLayout
android:layout_width="match_parent"
android:orientation="vertical"
android:layout_height="match_parent"
>
<android.support.v4.view.ViewPager
android:id="@+id/ViewPager1"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
></android.support.v4.view.ViewPager>
<RadioGroup
android:id="@+id/RadioGroup1"
android:layout_width="match_parent"
android:layout_height="50dp"
android:orientation="horizontal"
>
<RadioButton
android:text="1"
android:gravity="center"
android:layout_width="0dp"
android:id="@+id/radio0"
android:layout_weight="1"
android:layout_height="50dp"
android:button="@null"
android:background="@drawable/set"
/>
<RadioButton
android:text="2"
android:gravity="center"
android:layout_width="0dp"
android:id="@+id/radio1"
android:layout_height="50dp"
android:layout_weight="1"
android:button="@null"
android:background="@drawable/set"
/>
<RadioButton
android:text="3"
android:gravity="center"
android:layout_width="0dp"
android:id="@+id/radio2"
android:layout_height="50dp"
android:layout_weight="1"
android:button="@null"
android:background="@drawable/set"
/>
</RadioGroup>
</LinearLayout>
<LinearLayout
android:layout_width="250dp"
android:layout_height="match_parent"
android:background="#0ff"
android:gravity="center_horizontal"
android:orientation="vertical"
android:layout_gravity="start">
<ImageView
android:layout_width="150dp"
android:layout_height="150dp"
android:id="@+id/image2"
/>
<TextView
android:layout_marginTop="10dp"
android:textSize="25dp"
android:text="座右铭"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<com.handmark.pulltorefresh.library.PullToRefreshListView
android:id="@+id/pulldrwable"
android:layout_marginTop="10dp"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1">
</com.handmark.pulltorefresh.library.PullToRefreshListView>
</LinearLayout>
</android.support.v4.widget.DrawerLayout>
Frag0 TabLayout
package com.bw.zsd.frag;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.design.widget.TabLayout;
import android.support.v4.app.Fragment;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.FrameLayout;
import android.widget.ListView;
import com.bw.zsd.adapter.MPagerAdapter;
import com.bw.zsd.adapter.MyAdapter;
import com.bw.zsd.bean.Json;
import com.bw.zsd.day11.BlankFragment;
import com.bw.zsd.day11.R;
import com.bw.zsd.task.MyAsyncTask;
import com.handmark.pulltorefresh.library.PullToRefreshBase;
import com.handmark.pulltorefresh.library.PullToRefreshListView;
import java.util.ArrayList;
/**
* @Auther: ZSD
* @Date: 2019/1/8 0008 19:45:03
* @Description:
*/
public class Frag0 extends Fragment {
//放所有的fragment 从你的世界路过,我是那个偷影子的人。虽然无声告白,只愿你让我留在你身边
ArrayList<Fragment> fragmentList = new ArrayList<Fragment>();
// tablayout的标题
ArrayList<String> titleList = new ArrayList<String>();
private View view;
private MPagerAdapter mPagerAdapter;
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
view = inflater.inflate(R.layout.frag0, container, false);
setTableLayout();
return view;
}
//导航
private void setTableLayout() {
//标题栏
TabLayout tableLayout = view.findViewById(R.id.tabLayout);
ViewPager viewPager = view.findViewById(R.id.viewPager);
initData();
mPagerAdapter = new MPagerAdapter(getChildFragmentManager(),fragmentList,titleList);
viewPager.setAdapter(mPagerAdapter);
//tablayout的显示模式;
tableLayout.setTabMode(TabLayout.MODE_SCROLLABLE);//滚动模式
//让tablayout和viewpager关联起来;
tableLayout.setupWithViewPager(viewPager);
}
//菜单里的视图
private void initData() {
fragmentList.add(new Frag0_0());
fragmentList.add(new Frag0_1());
fragmentList.add(new Frag0_2());
titleList.add("标题0");
titleList.add("标题1");
titleList.add("标题2");
}
}
frag0.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
android:orientation="vertical">
<android.support.design.widget.TabLayout
android:id="@+id/tabLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content">
</android.support.design.widget.TabLayout>
<android.support.v4.view.ViewPager
android:id="@+id/viewPager"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1" />
</LinearLayout>
MyPagerAdapter
package com.bw.zsd.adapter;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import java.util.ArrayList;
/**
* @Auther: ZSD
* @Date: 2019/1/8 0008 14:01:37
* @Description:
*/
public class MPagerAdapter extends FragmentPagerAdapter {
ArrayList<Fragment> fragmentList = new ArrayList<Fragment>();
// tablayout的标题
ArrayList<String> titleList = new ArrayList<String>();
public MPagerAdapter(FragmentManager fm, ArrayList<Fragment> fragmentList, ArrayList<String> titleList) {
super(fm);
this.fragmentList = fragmentList;
this.titleList = titleList;
}
public MPagerAdapter(FragmentManager fm) {
super(fm);
}
@Override
public Fragment getItem(int i) {
return fragmentList.get(i);
}
@Override
public int getCount() {
return 3;
}
@Nullable
@Override
public CharSequence getPageTitle(int position) {
return titleList.get(position);
}
}
MyAdapterLayout
package com.bw.zsd.adapter;
import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;
import com.bw.zsd.MyApp;
import com.bw.zsd.bean.JsonDrawble;
import com.bw.zsd.day11.R;
import com.nostra13.universalimageloader.core.DisplayImageOptions;
import com.nostra13.universalimageloader.core.ImageLoader;
import java.util.ArrayList;
/**
* @Auther: ZSD
* @Date: 2019/1/8 0008 15:44:48
* @Description:
*/
public class MyAdapterLayout extends BaseAdapter {
private ArrayList<JsonDrawble.DataBean> list = new ArrayList<>();
private Context context;
public MyAdapterLayout(ArrayList<JsonDrawble.DataBean> list, Context context) {
this.list = list;
this.context = context;
}
@Override
public int getCount() {
return list.size();
}
@Override
public Object getItem(int position) {
return list.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public int getItemViewType(int position) {
return position % 4;
}
@Override
public int getViewTypeCount() {
return 4;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
int itemViewType = getItemViewType(position);
switch (itemViewType){
case 0:{
convertView = View.inflate(context,R.layout.item0,null);
ImageView imageView = convertView.findViewById(R.id.image1_0);
TextView textView = convertView.findViewById(R.id.text1_0);
DisplayImageOptions options = new MyApp().getDisplayImageOptions();
ImageLoader.getInstance().displayImage(list.get(position).getPic_url(),imageView,options);
textView.setText(list.get(position).getNews_title());
}break;
case 1:{
convertView = View.inflate(context,R.layout.item1,null);
ImageView imageView = convertView.findViewById(R.id.image1_1);
TextView textView = convertView.findViewById(R.id.text1_1);
DisplayImageOptions options = new MyApp().getDisplayImageOptions();
ImageLoader.getInstance().displayImage(list.get(position).getPic_url(),imageView,options);
textView.setText(list.get(position).getNews_title());
}break;
case 3:{
convertView = View.inflate(context,R.layout.item2,null);
ImageView imageView = convertView.findViewById(R.id.image1_2);
TextView textView = convertView.findViewById(R.id.text1_2);
DisplayImageOptions options = new MyApp().getDisplayImageOptions();
ImageLoader.getInstance().displayImage(list.get(position).getPic_url(),imageView,options);
textView.setText(list.get(position).getNews_title());
}break;
case 2:{
convertView = View.inflate(context,R.layout.item3,null);
ImageView imageView = convertView.findViewById(R.id.image1_3);
TextView textView = convertView.findViewById(R.id.text1_3);
DisplayImageOptions options = new MyApp().getDisplayImageOptions();
ImageLoader.getInstance().displayImage(list.get(position).getPic_url(),imageView,options);
textView.setText(list.get(position).getNews_title());
}break;
}
return convertView;
}
}
MyAdapter 外部
package com.bw.zsd.adapter;
import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;
import com.bw.zsd.MyApp;
import com.bw.zsd.bean.Json;
import com.bw.zsd.day11.MainActivity;
import com.bw.zsd.day11.R;
import com.nostra13.universalimageloader.core.DisplayImageOptions;
import com.nostra13.universalimageloader.core.ImageLoader;
import java.util.ArrayList;
/**
* @Auther: ZSD
* @Date: 2019/1/8 0008 15:44:48
* @Description:
*/
public class MyAdapter extends BaseAdapter {
private ArrayList<Json.DataBean> list = new ArrayList<>();
private Context context;
public MyAdapter(ArrayList<Json.DataBean> list, Context context) {
this.list = list;
this.context = context;
}
@Override
public int getCount() {
return list.size();
}
@Override
public Object getItem(int position) {
return list.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
convertView = View.inflate(context,R.layout.item,null);
ImageView imageView = convertView.findViewById(R.id.image1);
TextView textView = convertView.findViewById(R.id.text1);
DisplayImageOptions options = new MyApp().getDisplayImageOptions();
ImageLoader.getInstance().displayImage(list.get(position).getThumbnail_pic_s(),imageView,options);
textView.setText(list.get(position).getTitle());
return convertView;
}
}
MyAsyncTask
package com.bw.zsd.task;
import android.content.ContentValues;
import android.content.Context;
import android.os.AsyncTask;
import android.widget.Toast;
import com.bw.zsd.adapter.MyAdapter;
import com.bw.zsd.bean.Json;
import com.bw.zsd.bean.JsonDrawble;
import com.bw.zsd.sql.Dao;
import com.bw.zsd.utils.NetWordUtils;
import com.google.gson.Gson;
import com.handmark.pulltorefresh.library.PullToRefreshListView;
import java.util.ArrayList;
import java.util.List;
/**
* @Auther: ZSD
* @Date: 2019/1/8 0008 09:01:26
* @Description:
*/
public class MyAsyncTask extends AsyncTask<String,Void,String> {
ArrayList<Json.DataBean> list = new ArrayList<>();
private PullToRefreshListView pullToRefreshListView;
private MyAdapter adapter;
private String title;
private Dao dao;
private Context context;
public MyAsyncTask(ArrayList<Json.DataBean> list, PullToRefreshListView pullToRefreshListView, MyAdapter adapter, Dao dao, Context context) {
this.list = list;
this.pullToRefreshListView = pullToRefreshListView;
this.adapter = adapter;
this.dao = dao;
this.context = context;
}
@Override
protected String doInBackground(String... strings) {
return NetWordUtils.getJson(strings[0]);
}
@Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
Gson gson = new Gson();
Json json = gson.fromJson(s, Json.class);
List<Json.DataBean> data = json.getData();
for (int i = 0; i <data.size() ; i++) {
dao.delete("first","uniquekey=?",new String[]{data.get(i).getUniquekey()});
ContentValues contentValues = new ContentValues();
contentValues.put("uniquekey",data.get(i).getUniquekey());
contentValues.put("news_title",data.get(i).getTitle());
contentValues.put("thumbnail_pic_s",data.get(i).getThumbnail_pic_s());
long first = dao.add("first", null, contentValues);
if (first > 1) {
Toast.makeText(context, "添加成功", Toast.LENGTH_SHORT).show();
}
}
list.addAll(data);
adapter.notifyDataSetChanged();
pullToRefreshListView.onRefreshComplete();
}
}
MyAsyncTaskLayout
package com.bw.zsd.task;
import android.os.AsyncTask;
import com.bw.zsd.adapter.MyAdapter;
import com.bw.zsd.adapter.MyAdapterLayout;
import com.bw.zsd.bean.Json;
import com.bw.zsd.bean.JsonDrawble;
import com.bw.zsd.utils.NetWordUtils;
import com.google.gson.Gson;
import com.handmark.pulltorefresh.library.PullToRefreshListView;
import java.util.ArrayList;
import java.util.List;
/**
* @Auther: ZSD
* @Date: 2019/1/8 0008 09:01:26
* @Description:
*/
public class MyAsyncTaskLayout extends AsyncTask<String,Void,String> {
ArrayList<JsonDrawble.DataBean> list = new ArrayList<>();
private PullToRefreshListView pullToRefreshListView;
private MyAdapterLayout adapter;
private String title;
public MyAsyncTaskLayout(ArrayList<JsonDrawble.DataBean> list, PullToRefreshListView pullToRefreshListView, MyAdapterLayout adapter) {
this.list = list;
this.pullToRefreshListView = pullToRefreshListView;
this.adapter = adapter;
}
@Override
protected String doInBackground(String... strings) {
return NetWordUtils.getJson(strings[0]);
}
@Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
Gson gson = new Gson();
JsonDrawble json = gson.fromJson(s, JsonDrawble.class);
List<JsonDrawble.DataBean> data = json.getData();
list.addAll(data);
adapter.notifyDataSetChanged();
pullToRefreshListView.onRefreshComplete();
}
}
NetWordUtils 工具类
package com.bw.zsd.utils;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.support.v4.net.ConnectivityManagerCompat;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.sql.Connection;
/**
* @Auther: ZSD
* @Date: 2019/1/8 0008 09:02:31
* @Description:
*/
public class NetWordUtils {
//判断网络
public static boolean isConnection(Context context) {
if (context != null) {
ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo networkInfo=connectivityManager.getActiveNetworkInfo();
if (networkInfo != null) {
return networkInfo.isAvailable();
}
}
return false;
}
public static String getJson(String urlString){
try {
URL url = new URL(urlString);
HttpURLConnection connection =(HttpURLConnection) url.openConnection();
// connection.setRequestMethod("GET");
// connection.setReadTimeout(5000);
// connection.setConnectTimeout(5000);
InputStream stream = connection.getInputStream();
BufferedReader reader= new BufferedReader(new InputStreamReader(stream));
StringBuilder builder = new StringBuilder();
String strs;
while((strs=reader.readLine())!=null){
builder.append(strs);
}
return builder.toString();
} catch (Exception e) {
e.printStackTrace();
}
return "";
}
public static Bitmap getJsonBitmap(String urlString){
try {
URL url = new URL(urlString);
HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();
InputStream inputStream = httpURLConnection.getInputStream();
Bitmap bitmap = BitmapFactory.decodeStream(inputStream);
return bitmap;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
}
MyApp 图片框架
package com.bw.zsd;
import android.app.Application;
import com.bw.zsd.day11.R;
import com.nostra13.universalimageloader.core.DisplayImageOptions;
import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.ImageLoaderConfiguration;
import com.nostra13.universalimageloader.core.display.RoundedBitmapDisplayer;
/**
* @Auther: ZSD
* @Date: 2019/1/8 0008 15:40:30
* @Description:
*/
public class MyApp extends Application {
@Override
public void onCreate() {
super.onCreate();
ImageLoaderConfiguration builder = new ImageLoaderConfiguration.Builder(this).build();
ImageLoader.getInstance().init(builder);
}
public static DisplayImageOptions getDisplayImageOptions(){
DisplayImageOptions displayImageOptions = new DisplayImageOptions.Builder()
.showImageForEmptyUri(R.mipmap.ic_launcher)
.showImageOnFail(R.mipmap.ic_launcher)
.showImageOnLoading(R.mipmap.ic_launcher)
.build();
return displayImageOptions;
}
public static DisplayImageOptions getDisplayImageOptions2(){
DisplayImageOptions displayImageOptions = new DisplayImageOptions.Builder()
.showImageForEmptyUri(R.mipmap.ic_launcher)
.showImageOnFail(R.mipmap.ic_launcher)
.showImageOnLoading(R.mipmap.ic_launcher)
.displayer(new RoundedBitmapDisplayer(360))
.build();
return displayImageOptions;
}
}
Dao
package com.bw.zsd.sql;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
/**
* @Auther: ZSD
* @Date: 2019/1/10 0010 14:03:35
* @Description:
*/
public class Dao {
private final SQLiteDatabase db;
public Dao(Context context) {
Sqliter sqliter = new Sqliter(context);
db = sqliter.getWritableDatabase();
}
public long delete(String table, String whereClause, String[] whereArgs){
return db.delete(table, whereClause, whereArgs);
}
public long add(String table, String nullColumnHack, ContentValues values){
return db.insert(table, nullColumnHack, values);
}
public Cursor query(String table, String[] columns, String selection,
String[] selectionArgs, String groupBy, String having){
return db.query(table,columns,selection,selectionArgs,groupBy,groupBy,having);
}
}
Sqliter
package com.bw.zsd.sql;
import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
/**
* @Auther: ZSD
* @Date: 2019/1/9 0009 10:57:42
* @Description:
*/
public class Sqliter extends SQLiteOpenHelper {
public Sqliter(Context context) {
super(context, "bw.db", null, 1);
}
@Override
public void onCreate(SQLiteDatabase db) {
db.execSQL("create table first(uniquekey primary key ,news_title varchar(200),thumbnail_pic_s varchar(200))");
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
}
}
Frag0_0
package com.bw.zsd.frag;
import android.database.Cursor;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
import com.bw.zsd.adapter.MyAdapter;
import com.bw.zsd.bean.Json;
import com.bw.zsd.day11.R;
import com.bw.zsd.sql.Dao;
import com.bw.zsd.task.MyAsyncTask;
import com.bw.zsd.utils.NetWordUtils;
import com.handmark.pulltorefresh.library.PullToRefreshBase;
import com.handmark.pulltorefresh.library.PullToRefreshListView;
import java.util.ArrayList;
/**
* @Auther: ZSD
* @Date: 2019/1/9 0009 08:59:40
* @Description:
*/
public class Frag0_0 extends Fragment {
ArrayList<Json.DataBean> list = new ArrayList<Json.DataBean>();
private PullToRefreshListView pullToRefreshListView;
private MyAdapter adapter;
private int page;
private String urlString = "http://www.xieast.com/api/news/news.php?page/1";
private Dao dao;
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.frag0_0, container, false);
pullToRefreshListView = view.findViewById(R.id.pull);
dao = new Dao(getActivity());
//上下拉都支持
pullToRefreshListView.setMode(PullToRefreshListView.Mode.BOTH);
adapter = new MyAdapter(list,getActivity());
init(page);
pullToRefreshListView.setAdapter(adapter);
pullToRefreshListView.setOnRefreshListener(new PullToRefreshBase.OnRefreshListener2<ListView>() {
@Override
public void onPullDownToRefresh(PullToRefreshBase<ListView> pullToRefreshBase) {
list.clear();
init(page);
}
@Override
public void onPullUpToRefresh(PullToRefreshBase<ListView> pullToRefreshBase) {
page++;
init(page);
}
});
return view;
}
private void init(int page) {
String s = urlString + page;
boolean connection = NetWordUtils.isConnection(getActivity());
if (connection) {
new MyAsyncTask(list,pullToRefreshListView,adapter,dao,getActivity()).execute(s);
} else {
Toast.makeText(getActivity(), "请链接网络", Toast.LENGTH_SHORT).show();
Cursor first = dao.query("first", null, null, null, null, null);
if (first.moveToFirst()) {
do {
String uniquekey = first.getString(first.getColumnIndex("uniquekey"));
String news_title = first.getString(first.getColumnIndex("news_title"));
String thumbnail_pic_s = first.getString(first.getColumnIndex("thumbnail_pic_s"));
list.add(new Json.DataBean(uniquekey,news_title,thumbnail_pic_s));
}while (first.moveToNext());
}
first.close();
adapter = new MyAdapter(list,getActivity());
pullToRefreshListView.setAdapter(adapter);
pullToRefreshListView.onRefreshComplete();
}
}
}
Frag0_0
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
android:orientation="vertical">
<com.handmark.pulltorefresh.library.PullToRefreshListView
android:id="@+id/pull"
android:layout_width="match_parent"
android:layout_height="match_parent"
>
</com.handmark.pulltorefresh.library.PullToRefreshListView>
</LinearLayout>