效果图
adpter
package com.bawei.demo15.adapter;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.support.annotation.NonNull;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;
import com.bawei.demo15.R;
import com.bawei.demo15.view.News;
import com.bawei.demo15.workBean.Constants;
import com.bumptech.glide.Glide;
import com.google.gson.Gson;
import java.util.List;
public class NewsAdapter extends com.jcodecraeer.xrecyclerview.XRecyclerView.Adapter<com.jcodecraeer.xrecyclerview.XRecyclerView.ViewHolder> {
private List<News.Data> list;
private Context context;
private News news;
public NewsAdapter(List<News.Data> list, Context context,News news) {
this.list = list;
this.context = context;
this.news = news;
}
public void loadMore(List<News.Data> data) {
if (list != null) {
list.addAll(data);
notifyDataSetChanged();
}
}
@NonNull
@Override
public com.jcodecraeer.xrecyclerview.XRecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
if (viewType == Constants.TYPE1) {
View view = LayoutInflater.from(context).inflate(R.layout.news_item2_layout, parent, false);
return new Type1ViewHolder(view);
} else {
View view2 = LayoutInflater.from(context).inflate(R.layout.news_item_layout, parent, false);
return new Type2ViewHolder(view2);
}
}
@Override
public void onBindViewHolder(@NonNull final com.jcodecraeer.xrecyclerview.XRecyclerView.ViewHolder holder, final int position) {
holder.itemView.setOnLongClickListener(new View.OnLongClickListener() {
@Override
public boolean onLongClick(View view) {
AlertDialog.Builder builder = new AlertDialog.Builder(context);
builder.setTitle("删除");
builder.setNegativeButton("确定", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
int pos = holder.getLayoutPosition();//得到下标
System.out.println("pos----"+pos);
list.remove(position);//删除集合的数据
news.data = list;
String json = new Gson().toJson(news);
notifyDataSetChanged();
}
});
builder.setNeutralButton("取消", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
}
});
builder.show();
return true;
}
});
News.Data data = list.get(position);
if (holder instanceof Type1ViewHolder) {//1张图片
((Type1ViewHolder) holder).title.setText(data.topic);
} else if (holder instanceof Type2ViewHolder) {//三张图片
((Type2ViewHolder) holder).title.setText(data.topic);
if (data.miniimg != null && data.miniimg.size() > 0) {
if (data.miniimg.size() == 1) {
Glide.with(context).load(data.miniimg.get(0).src).into(((Type2ViewHolder) holder).iv1);
Glide.with(context).load(data.miniimg.get(0).src).into(((Type2ViewHolder) holder).iv2);
Glide.with(context).load(data.miniimg.get(0).src).into(((Type2ViewHolder) holder).iv3);
} else if (data.miniimg.size() == 2) {
Glide.with(context).load(data.miniimg.get(0).src).into(((Type2ViewHolder) holder).iv1);
Glide.with(context).load(data.miniimg.get(1).src).into(((Type2ViewHolder) holder).iv2);
Glide.with(context).load(data.miniimg.get(1).src).into(((Type2ViewHolder) holder).iv3);
} else {
Glide.with(context).load(data.miniimg.get(0).src).into(((Type2ViewHolder) holder).iv1);
Glide.with(context).load(data.miniimg.get(1).src).into(((Type2ViewHolder) holder).iv2);
Glide.with(context).load(data.miniimg.get(2).src).into(((Type2ViewHolder) holder).iv3);
}
}
}
}
@Override
public int getItemViewType(int position) {
return position % 2 == 0 ? Constants.TYPE1 : Constants.TYPE2;
}
@Override
public int getItemCount() {
return list.size();
}
class Type1ViewHolder extends com.jcodecraeer.xrecyclerview.XRecyclerView.ViewHolder {
private TextView title;
public Type1ViewHolder(View itemView) {
super(itemView);
title = itemView.findViewById(R.id.title1);
}
}
class Type2ViewHolder extends com.jcodecraeer.xrecyclerview.XRecyclerView.ViewHolder {
private TextView title;
private ImageView iv1, iv2, iv3;
public Type2ViewHolder(View itemView) {
super(itemView);
iv1 = itemView.findViewById(R.id.img1);
iv2 = itemView.findViewById(R.id.img2);
iv3 = itemView.findViewById(R.id.img3);
title = itemView.findViewById(R.id.title3);
}
}
}
db
package com.bawei.demo15.db;
import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
public class DbHelper extends SQLiteOpenHelper {
//数据库文件名称
private static final String DB_NAME = "news.db";
public static final String NEWS_TABLE_NAME = "news";
private static final int VERSION = 1;
public DbHelper(Context context) {
super(context, DB_NAME, null, VERSION);
}
@Override
public void onCreate(SQLiteDatabase sqLiteDatabase) {
String sql = "create table " + NEWS_TABLE_NAME + " (_id Integer PRIMARY KEY ,json text)";
sqLiteDatabase.execSQL(sql);
}
@Override
public void onUpgrade(SQLiteDatabase sqLiteDatabase, int i, int i1) {
}
}
model
package com.bawei.demo15.model;
import com.bawei.demo15.utils.OkhttpUtils;
import java.util.Map;
public class NewsModel {
public void getData(String getUrl, Map<String,String> params, final ResponseCallback responseCallback) {
OkhttpUtils.getInstance().postData(getUrl,params, new OkhttpUtils.ICallback() {
@Override
public void success(String result) {
responseCallback.success(result);
}
@Override
public void fail(String msg) {
responseCallback.fail(msg);
}
});
}
public interface ResponseCallback{
void success(String result);
void fail(String msg);
}
}
presenter
package com.bawei.demo15.Presenter;
import android.text.TextUtils;
import com.bawei.demo15.model.NewsModel;
import com.bawei.demo15.utils.OkhttpUtils;
import com.bawei.demo15.view.INews;
import com.bawei.demo15.view.News;
import com.google.gson.Gson;
import java.util.Map;
public class NewsPresenter {
private INews iNews;
private NewsModel model;
public NewsPresenter(INews iNews) {
model = new NewsModel();
attach(iNews);
}
/**
* 绑定view
* @param iNews
*/
public void attach(INews iNews){
this.iNews = iNews;
}
/**
* 获取数据的方法
* @param getUrl
*/
public void getData(String getUrl, Map<String ,String> params) {
model.getData(getUrl, params,new NewsModel.ResponseCallback() {
@Override
public void success(String result) {
if (!TextUtils.isEmpty(result)) {
String s = result.replace("null(","")
.replace(")","");
News news = new Gson().fromJson(s, News.class);
iNews.success(news);
}
}
@Override
public void fail(String msg) {
}
});
OkhttpUtils.getInstance().getData(getUrl, new OkhttpUtils.ICallback() {
@Override
public void success(String result) {
}
@Override
public void fail(String msg) {
}
});
}
/**
* 解绑
*/
public void detach(){
this.iNews = null;
}
}
utils
package com.bawei.demo15.utils;
import android.os.Handler;
import java.io.IOException;
import java.util.Map;
import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.FormBody;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;
import okhttp3.logging.HttpLoggingInterceptor;
public class OkhttpUtils {
private static OkhttpUtils okhttpUtils;
private OkHttpClient okHttpClient;
private Handler handler;
private OkhttpUtils() {
okHttpClient = new OkHttpClient.Builder()
.addInterceptor(new HttpLoggingInterceptor().setLevel(HttpLoggingInterceptor.Level.BODY))
.build();
handler = new Handler();
}
public static OkhttpUtils getInstance() {
if (okhttpUtils == null) {
okhttpUtils = new OkhttpUtils();
}
return okhttpUtils;
}
/**
* get方式
*/
public void getData(String url, final ICallback callback){
final Request request = new Request.Builder()
.url(url).build();
okHttpClient.newCall(request).enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
if (callback!=null){
handler.post(new Runnable() {
@Override
public void run() {
callback.fail("请求失败");
}
});
}
}
@Override
public void onResponse(Call call, Response response) throws IOException {
if (callback!=null){
if (response.isSuccessful()&&response.code()==200){
final String result = response.body().string();
handler.post(new Runnable() {
@Override
public void run() {
callback.success(result);
}
});
}
}
}
});
}
/**
* post方式
*/
public void postData(String url, Map<String,String> params, final ICallback callback){
FormBody.Builder builder = new FormBody.Builder();
for (Map.Entry<String, String> bean : params.entrySet()) {
builder.add(bean.getKey(),bean.getValue());
}
final Request request = new Request.Builder()
.url(url).post(builder.build()).build();
okHttpClient.newCall(request).enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
if (callback!=null){
handler.post(new Runnable() {
@Override
public void run() {
callback.fail("请求失败");
}
});
}
}
@Override
public void onResponse(Call call, Response response) throws IOException {
if (callback!=null){
if (response.isSuccessful()&&response.code()==200){
final String result = response.body().string();
handler.post(new Runnable() {
@Override
public void run() {
callback.success(result);
}
});
}
}
}
});
}
public interface ICallback{
void success(String result);
void fail(String msg);
}
}
view
package com.bawei.demo15.view;
public interface INews {
void success(News news);
}
package com.bawei.demo15.view;
import java.util.List;
public class News {
public String stat;
public List<Data> data;
public class Data {
public String topic;
public String source;
public List<IMG> miniimg;
public class IMG {
public String src;
}
}
}
workBean
package com.bawei.demo15.workBean;
public class Constants {
public static final String GET_URL = "http://ttpc.dftoutiao.com/jsonpc/refresh";
public static final int TYPE1 = 3;//条目是三张图
public static final int TYPE2 = 1;//条目是1张图
}
package com.bawei.demo15.workBean;
import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
public class NetWorkUtil {
/**
* @return 是否有活动的网络连接
*/
public final static boolean hasNetWorkConnection(Context context) {
//获取连接活动管理器
final ConnectivityManager connectivityManager = (ConnectivityManager) context.
getSystemService(Context.CONNECTIVITY_SERVICE);
//获取链接网络信息
final NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo();
return (networkInfo != null && networkInfo.isAvailable());
}
/**
* @return 返回boolean ,是否为wifi网络
*/
public final static boolean hasWifiConnection(Context context) {
final ConnectivityManager connectivityManager = (ConnectivityManager) context.
getSystemService(Context.CONNECTIVITY_SERVICE);
final NetworkInfo networkInfo = connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
//是否有网络并且已经连接
return (networkInfo != null && networkInfo.isConnectedOrConnecting());
}
/**
* @return 返回boolean, 判断网络是否可用, 是否为移动网络
*/
public final static boolean hasGPRSConnection(Context context) {
//获取活动连接管理器
final ConnectivityManager connectivityManager = (ConnectivityManager) context.
getSystemService(Context.CONNECTIVITY_SERVICE);
final NetworkInfo networkInfo = connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
return (networkInfo != null && networkInfo.isAvailable());
}
/**
* @return 判断网络是否可用，并返回网络类型，ConnectivityManager.TYPE_WIFI，ConnectivityManager.TYPE_MOBILE，不可用返回-1
*/
public static final int getNetWorkConnectionType(Context context) {
final ConnectivityManager connectivityManager = (ConnectivityManager) context.
getSystemService(Context.CONNECTIVITY_SERVICE);
final NetworkInfo wifiNetworkInfo = connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
final NetworkInfo mobileNetworkInfo = connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
if (wifiNetworkInfo != null && wifiNetworkInfo.isAvailable()) {
return ConnectivityManager.TYPE_WIFI;
} else if (mobileNetworkInfo != null && mobileNetworkInfo.isAvailable()) {
return ConnectivityManager.TYPE_MOBILE;
} else {
return -1;
}
}
}
MainActivity
package com.bawei.demo15;
import android.content.ContentValues;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.DefaultItemAnimator;
import android.support.v7.widget.LinearLayoutManager;
import android.widget.Toast;
import com.bawei.demo15.Presenter.NewsPresenter;
import com.bawei.demo15.adapter.NewsAdapter;
import com.bawei.demo15.db.DbHelper;
import com.bawei.demo15.view.INews;
import com.bawei.demo15.view.News;
import com.bawei.demo15.workBean.Constants;
import com.bawei.demo15.workBean.NetWorkUtil;
import com.google.gson.Gson;
import com.jcodecraeer.xrecyclerview.XRecyclerView;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
public class MainActivity extends AppCompatActivity implements INews {
private XRecyclerView rv;
private NewsPresenter presenter;
private int page = 5010;
private List<News.Data> data;
private boolean isRefresh = true;//判断是下啦刷新还是上啦加载
private NewsAdapter newsAdapter;
private DbHelper dbHelper;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initView();
initData();
}
private void initData() {
if (getIntent().getExtras() != null) {
page = 5010 + Integer.parseInt(getIntent().getExtras().getString("id"));
}
dbHelper = new DbHelper(this);
presenter = new NewsPresenter(this);
data = new ArrayList<>();
request();
}
public void request() {
if (NetWorkUtil.hasWifiConnection(this) || NetWorkUtil.hasGPRSConnection(this)) {
Map<String, String> p = new HashMap<>();
p.put("type", page + "");
presenter.getData(Constants.GET_URL, p);
} else {
Toast.makeText(this, "网络不通畅，请稍后再试！", Toast.LENGTH_SHORT).show();
String json = null;
//
//获取数据库对象，可读
SQLiteDatabase db = dbHelper.getReadableDatabase();
//获取数据库的游标
Cursor cursor = db.rawQuery("select * from news", null);
while (cursor.moveToNext()){
json = cursor.getString(cursor.getColumnIndex("json"));
}
//本地列表刷新
fillLocalData(json);
}
}
/**
* 本地列表刷新
* @param json
*/
private void fillLocalData(String json) {
News news = new Gson().fromJson(json,News.class);
newsAdapter = new NewsAdapter(news.data, this,news);
rv.setAdapter(newsAdapter);
}
private void initView() {
rv = findViewById(R.id.rv);
//设置局部刷新动画
rv.setItemAnimator(new DefaultItemAnimator());
rv.setPullRefreshEnabled(true);//刷新配置
rv.setLoadingMoreEnabled(true);//上拉配置
rv.setLayoutManager(new LinearLayoutManager(this));
rv.setLoadingListener(new XRecyclerView.LoadingListener() {
@Override
public void onRefresh() {
// rv.refreshComplete();
isRefresh = true;
//下拉刷新
page = 5010;
request();
}
@Override
public void onLoadMore() {
isRefresh = false;
page++;
request();
// rv.loadMoreComplete();
}
});
}
@Override
public void success(News news) {
//转换json串
String json = new Gson().toJson(news);
System.out.println("size:" + news.data.size());
data = news.data;
if (isRefresh) {
newsAdapter = new NewsAdapter(data, this,news);
rv.setAdapter(newsAdapter);
rv.refreshComplete();
//保存json串数据
SQLiteDatabase db = dbHelper.getWritableDatabase();
ContentValues contentValues = new ContentValues();
contentValues.put("json", json);
db.insert(DbHelper.NEWS_TABLE_NAME, null, contentValues);
} else {
if (newsAdapter != null) {
//上啦加载更多，刷新
newsAdapter.loadMore(news.data);
}
rv.loadMoreComplete();
}
}
@Override
protected void onDestroy() {
super.onDestroy();
presenter.detach();
}
}
主MainActivity.xml
<?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"
tools:context=".MainActivity">
<com.jcodecraeer.xrecyclerview.XRecyclerView
android:id="@+id/rv"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
</LinearLayout>
news_item_layout.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:padding="10dp">
<TextView
android:id="@+id/title3"
android:text="我是标题"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_marginTop="10dp">
<ImageView
android:id="@+id/img1"
android:src="@mipmap/ic_launcher"
android:layout_width="0dp"
android:layout_weight="1"
android:scaleType="centerCrop"
android:layout_height="70dp"/>
<ImageView
android:id="@+id/img2"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:src="@mipmap/ic_launcher"
android:layout_width="0dp"
android:scaleType="centerCrop"
android:layout_weight="1"
android:layout_height="70dp"/>
<ImageView
android:id="@+id/img3"
android:src="@mipmap/ic_launcher"
android:layout_width="0dp"
android:layout_weight="1"
android:scaleType="centerCrop"
android:layout_height="70dp"/>
</LinearLayout>
</LinearLayout>
news_item2_layout.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
android:padding="10dp">
<ImageView
android:id="@+id/img1"
android:src="@mipmap/ic_launcher"
android:layout_width="wrap_content"
android:scaleType="centerCrop"
android:layout_height="wrap_content"/>
<LinearLayout
android:layout_width="0dp"
android:layout_weight="1"
android:layout_height="wrap_content"
android:orientation="vertical"
android:layout_marginTop="10dp">
<TextView
android:id="@+id/title1"
android:layout_marginLeft="10dp"
android:text="我是标题"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
</LinearLayout>
</LinearLayout>
依赖
dependencies {
implementation 'com.github.bumptech.glide:glide:4.7.1'
annotationProcessor 'com.github.bumptech.glide:compiler:4.7.1'
implementation 'com.jcodecraeer:xrecyclerview:1.5.9'
implementation 'com.squareup.okhttp3:logging-interceptor:3.10.0'
implementation 'com.squareup.okhttp3:okhttp:3.10.0'
implementation 'com.google.code.gson:gson:2.8.5'
}
configurations.all {
resolutionStrategy.eachDependency { DependencyResolveDetails details ->
def requested = details.requested
if (requested.group == 'com.android.support') {
if (!requested.name.startsWith("multidex")) {
details.useVersion '27.1.1'
}
}
}
}
权限
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>