XML布局：
<?xml version="1.0" encoding="utf-8"?> <android.support.v4.widget.DrawerLayout 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:id="@+id/drawerlayout" android:fitsSystemWindows="true" android:clickable="false" android:focusable="false" tools:openDrawer="start" tools:context=".MainActivity"> <LinearLayout android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <com.handmark.pulltorefresh.library.PullToRefreshListView android:id="@+id/pullToRefresh" android:layout_width="match_parent" android:layout_height="match_parent" /> </LinearLayout> <include android:layout_width="200dp" android:layout_height="match_parent" android:layout_gravity="start" android:background="#e8e8e8" android:clickable="false" android:focusable="false" layout="@layout/layout_left" /> </android.support.v4.widget.DrawerLayout> <?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="300dp" android:layout_height="match_parent" android:id="@+id/layout_left" android:layout_gravity="left" android:background="#e8e8e8" android:orientation="vertical" > <LinearLayout android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" android:gravity="center" > <ImageView android:layout_width="90dp" android:layout_height="90dp" android:src="@mipmap/ic_launcher" android:layout_centerInParent="true" android:id="@+id/image" android:clickable="true" android:focusable="true" android:layout_gravity="center" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="邮箱" android:textSize="20sp" android:layout_gravity="center" android:layout_marginTop="15dp" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="邮箱" android:textSize="20sp" android:layout_gravity="center" android:layout_marginTop="15dp" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="邮箱" android:textSize="20sp" android:layout_gravity="center" android:layout_marginTop="15dp" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="邮箱" android:textSize="20sp" android:layout_gravity="center" android:layout_marginTop="15dp" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="邮箱" android:textSize="20sp" android:layout_gravity="center" android:layout_marginTop="15dp" /> </LinearLayout> </LinearLayout>MAinActivity页面：
package com.example.administrator.monthdemo; import android.os.Bundle; import android.support.annotation.NonNull; import android.support.v4.widget.DrawerLayout; import android.support.v7.app.AppCompatActivity; import android.view.View; import android.widget.ListView; import android.widget.Toast; import com.example.administrator.adapter.MyAdapter; import com.example.administrator.bean.Bean; import com.example.administrator.db.DBDao; import com.example.administrator.utils.HttpHelper; import com.example.administrator.utils.NetworkUtils; import com.google.gson.Gson; import com.handmark.pulltorefresh.library.PullToRefreshBase; import com.handmark.pulltorefresh.library.PullToRefreshListView; import java.util.ArrayList; import java.util.List; public class MainActivity extends AppCompatActivity{ int page = 1; private DrawerLayout mDrawerlayout; private String urlPath = "http://www.xieast.com/api/news/news.php?page="; private List<Bean.DataBean> list = new ArrayList<>(); private List<Bean.DataBean> arrayList = new ArrayList<>(); private MyAdapter adapter; private PullToRefreshListView mPullToRefresh; private DBDao dbDao; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate( savedInstanceState ); setContentView( R.layout.activity_main ); initView(); mDrawerlayout.setDrawerListener( new DrawerLayout.DrawerListener() { @Override public void onDrawerSlide(@NonNull View drawerView, float slideOffset) { } @Override public void onDrawerOpened(@NonNull View drawerView) { toast( "侧滑菜单出来了" ); } @Override public void onDrawerClosed(@NonNull View drawerView) { toast( "侧滑菜单回去了" ); } @Override public void onDrawerStateChanged(int newState) { } } ); /** * 右侧网络请求 */ adapter = new MyAdapter(MainActivity.this); mPullToRefresh.setAdapter(adapter); adapter.setList(arrayList); dbDao = new DBDao( MainActivity.this ); boolean connected = NetworkUtils.isConnected( this ); if (connected){ doHttp( page ); mPullToRefresh.setMode( PullToRefreshBase.Mode.BOTH); mPullToRefresh.setOnRefreshListener( new PullToRefreshBase.OnRefreshListener2<ListView>() { @Override public void onPullDownToRefresh(PullToRefreshBase<ListView> refreshView) { page = 1; arrayList.clear(); doHttp( page ); onStop(); } @Override public void onPullUpToRefresh(PullToRefreshBase<ListView> refreshView) { page ++; doHttp(page); adapter.notifyDataSetChanged(); onStop(); if (page > 10){ toast("没有更多数据了......"); } } private void onStop() { mPullToRefresh.postDelayed(new Runnable() { @Override public void run() { mPullToRefresh.onRefreshComplete(); } }, 1000); } } ); }else { String data2 = dbDao.query(); Bean bean = new Gson().fromJson( data2, Bean.class ); List<Bean.DataBean> list = bean.getData(); arrayList.addAll( list ); adapter.setList( arrayList ); } } private void doHttp(int page) { new HttpHelper().get(urlPath+page).result( new HttpHelper.HttpListener() { @Override public void success(String data) { dbDao.add( data ); Gson gson = new Gson(); Bean bean = gson.fromJson( data, Bean.class ); list = bean.getData(); arrayList.addAll( list ); adapter.notifyDataSetChanged(); } @Override public void fail() { } } ); } private void toast(String data) { Toast.makeText( MainActivity.this, data, Toast.LENGTH_LONG ).show(); } private void initView() { mPullToRefresh = (PullToRefreshListView) findViewById( R.id.pullToRefresh ); mDrawerlayout = (DrawerLayout) findViewById( R.id.drawerlayout ); } }自定义适配器MyAdapter：
package com.example.administrator.adapter; import android.content.Context; import android.graphics.Bitmap; import android.view.View; import android.view.ViewGroup; import android.widget.BaseAdapter; import android.widget.ImageView; import android.widget.TextView; import com.example.administrator.bean.Bean; import com.example.administrator.monthdemo.R; import com.nostra13.universalimageloader.core.DisplayImageOptions; import com.nostra13.universalimageloader.core.ImageLoader; import java.util.ArrayList; import java.util.List; public class MyAdapter extends BaseAdapter{ private List<Bean.DataBean> list = new ArrayList<>(); private Context context; public MyAdapter(Context context) { this.context = context; } public void setList(List<Bean.DataBean> list) { this.list = list; notifyDataSetChanged(); } @Override public int getViewTypeCount() { return 2; } @Override public int getItemViewType(int position) { if(list.get(position).getThumbnail_pic_s02()!=null&&list.get(position).getThumbnail_pic_s03()!=null){ return 0;//有三个图片以上的，展示规则是，上面是title下面是图片 } return 1;// } @Override public int getCount() { return list.size(); } @Override public Object getItem(int i) { return list.get( i ); } @Override public long getItemId(int i) { return i; } @Override public View getView(int i, View view, ViewGroup viewGroup) { ViewHolder1 holder1; ViewHolder2 holder2; int type = getItemViewType( i ); DisplayImageOptions options = new DisplayImageOptions.Builder() .cacheOnDisk( true ) .bitmapConfig( Bitmap.Config.RGB_565) .build(); switch (type){ case 1: if (view == null){ view = View.inflate( context, R.layout.layout_item1,null ); holder1 = new ViewHolder1(); holder1.title = view.findViewById( R.id.title); holder1.imageView = view.findViewById( R.id.img_pic ); view.setTag( holder1 ); }else { holder1 = (ViewHolder1) view.getTag(); } holder1.title.setText( list.get( i ).getTitle() ); ImageLoader.getInstance().displayImage( list.get( i ).getThumbnail_pic_s(),holder1.imageView ,options); break; case 0: if (view == null){ view = View.inflate( context, R.layout.layout_item2,null ); holder2 = new ViewHolder2(); holder2.title = view.findViewById( R.id.title); holder2.img_pic1 = view.findViewById( R.id.img_pic1 ); holder2.img_pic2 = view.findViewById( R.id.img_pic2 ); holder2.img_pic3 = view.findViewById( R.id.img_pic3 ); view.setTag( holder2 ); }else { holder2 = (ViewHolder2) view.getTag(); } holder2.title.setText( list.get( i ).getTitle() ); ImageLoader.getInstance().displayImage( list.get( i ).getThumbnail_pic_s(),holder2.img_pic1,options ); ImageLoader.getInstance().displayImage( list.get( i ).getThumbnail_pic_s02(),holder2.img_pic2,options ); ImageLoader.getInstance().displayImage( list.get( i ).getThumbnail_pic_s03(),holder2.img_pic3 ,options); break; } return view; } class ViewHolder1{ TextView title; ImageView imageView; } class ViewHolder2{ TextView title; ImageView img_pic1,img_pic2,img_pic3; } }创建数据库并使用：
package com.example.administrator.db; import android.content.Context; import android.database.sqlite.SQLiteDatabase; import android.database.sqlite.SQLiteOpenHelper; public class DBHelper extends SQLiteOpenHelper { public DBHelper(Context context, String name, SQLiteDatabase.CursorFactory factory, int version) { super(context, name, factory, version); } @Override public void onCreate(SQLiteDatabase sqLiteDatabase) { sqLiteDatabase.execSQL("create table why (id integer primary key autoincrement,data text)"); } @Override public void onUpgrade(SQLiteDatabase sqLiteDatabase, int i, int i1) { } } package com.example.administrator.db; import android.content.ContentValues; import android.content.Context; import android.database.Cursor; import android.database.sqlite.SQLiteDatabase; import java.util.ArrayList; import java.util.List; public class DBDao { private final SQLiteDatabase db; public DBDao(Context context) { DBHelper dbHelper = new DBHelper(context, "why.db", null, 1); db = dbHelper.getWritableDatabase(); } public long add(String data){ ContentValues values = new ContentValues(); values.put("data",data); return db.insert("why",null,values); } public String query(){ String data = ""; Cursor cursor = db.query("why", null, null, null, null, null, null); while (cursor.moveToNext()){ data = cursor.getString(cursor.getColumnIndex("data")); } return data; } }
