The data requested by the network is added to the database, disconnected from the network directly...

The data requested by the network is added to the database, disconnected from the network directly...

1. Create a database
public class MHelp extends SQLiteOpenHelper {

//Create a database
public MHelp(Context context) {
super(context, "jh.db", null, 1);

//Create a data table
public void onCreate(SQLiteDatabase db ) {
//db.execSQL("create table jh_user (id Integer primary key autoincrement, date text,thumbnail_pic_s text,thumbnail_pic_s02 text,thumbnail_pic_s03 text ,title text)");
db.execSQL("create table jh_user (id Integer primary key) autoincrement, author_name text, date text,thumbnail_pic_s text,thumbnail_pic_s02 text,thumbnail_pic_s03 text ,title text)"); public class UserDao{ private final SQLiteDatabase database; public UserDao(Context context) { //Create database

public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {


2.Create Dao

MHelp mHelp = new MHelp(context);
database = mHelp.getReadableDatabase();

public void insert(String author_name, String date, String thumbnail_pic_s, String thumbnail_pic_s02, String thumbnail_pic_s03, String title) {
database.execSQL("insert into jh_user (author_name,date,thumbnail_pic_s,thumbnail_pic_s02,thumbnail_pic_s03, title) values(?,?,?,?,?,?)",new Object[]{author_name,date,thumbnail_pic_s,thumbnail_pic_s02,thumbnail_pic_s02,thumbnail,title_s03); List<ResponBean.DataItem> list = new ArrayList<>(); while (cursor.moveToNext()){ String author_name = cursor.getString(cursor.getColumnIndex("author_name")); String date = cursor.getString(cursor. getColumnIndex("date"));

public List<ResponBean.DataItem> query() {
Cursor cursor = database.rawQuery("select * from jh_user", null );

String thumbnail_pic_s = cursor.getString(cursor.getColumnIndex("thumbnail_pic_s")); list.add(dataItem); } return list; } }//This is a method in the interface @Override public void doString(List<ResponBean.DataItem > dataItems) { if(dataItems == null){ Toast.makeText(getActivity(), "Data request error", Toast.LENGTH_SHORT).show(); return; } updateData(dataItems); loadComplete(); //to Add data to the database for(int i=0; i<dataItems.size();i++){
String thumbnail_pic_s02 = cursor.getString(cursor.getColumnIndex("thumbnail_pic_s02"));
String thumbnail_pic_s03 = cursor.getString(cursor .getColumnIndex("thumbnail_pic_s03"));
String title = cursor.getString(cursor.getColumnIndex("title"));
ResponBean.DataItem dataItem = new ResponBean.DataItem(author_name, date,thumbnail_pic_s, thumbnail_pic_s02, thumbnail_pic_s03, title);

String author_name = dataItems.get(i).getAuthor_name();
String date = dataItems.get(i).getDate();
String thumbnail_pic_s = dataItems.get(i).getThumbnail_pic_s();
String thumbnail_pic_s02 = dataItems .get(i).getThumbnail_pic_s02();
String thumbnail_pic_s03 = dataItems.get(i).getThumbnail_pic_s03();
String title = dataItems.get(i).getTitle();

3. Database and display
//Determine whether there is a network, usually written at the beginning of the program
Toast.makeText(getActivity(), "Network is not available", Toast.LENGTH_SHORT).show( );
//Jump settings interface
//startActivity(new Intent(Settings.ACTION_SETTINGS));
//Create a thread to query the database and assign it

return view;

//Query the database and display
private void thread() {
new Thread(new Runnable() {
public void run() {
List<ResponBean.DataItem> query = dao.query();
4. The utility class used
public class NetWork {
* Determine whether there is a network
* */
public static boolean isNetwork(Context context){
//Get system service, connect service
ConnectivityManager cm = (ConnectivityManager) context.getSystemService(context.CONNECTIVITY_SERVICE);
//Get active network Information
NetworkInfo activeNetworkInfo = cm.getActiveNetworkInfo();
//If the available network is not empty and available, it means there is a network
return activeNetworkInfo != null && activeNetworkInfo.isAvailable();

Author: Ka Fai, feed
Source: CSDN
Copyright: This article is a blogger original article , Please attach a link to the blog post for reprinting!