请处理一个班级项目，我将很快提交，我需要您的帮助。am试图将以varbinary格式保存在sql server 2016中的图像导入到我的android image view.i中，此级别的库存同时，我需要帮助来克服它。我也检查了google和youtube，但是我发现的答案并没有帮助我。数据库表中的其他值被检索到，但当我查看日志文件时，该图像告诉我它没有适配器您可以在代码中看到我的适配器已附加。请帮助。下面是我的代码 使用jtds连接到数据库
package com.example.abun.shoprite1;
import java.lang.String;
import java.io.File;
import android.annotation.SuppressLint;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import static java.nio.file.Files.size;
import java.sql.*;
import java.util.*;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.os.StrictMode;
import android.util.Log;
public class ConnectionClass {
String url;
String serverName;
String instanceName;
String databaseName;
String userName;
String password;
String port;
String sql;
ConnectionClass() {
serverName = "192.168.80.1";
port ="1433";
//instanceName = "";
databaseName = "shoprite";
userName = "abun2";
password = "shoprite";
}
private String getConnectionUrl() {
// Constructing the connection string
return url + serverName +" ;DatabaseName = " +databaseName +";user="+userName + ";password="+password +";";
}
//private String getConnectionUrl() {
// Constructing the connection string
//return url + serverName +" ;DatabaseName = " +databaseName+"; integratedSecurity=true";
//}
@SuppressLint("NewApi")
public Connection getConnection() throws SQLException, ClassNotFoundException {
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
String ConnUrl;
//String conny= "jdbc:jtds:sqlserver://"+ serverName+ ":" +port+ ";"+ " ;DatabaseName = " +databaseName+"; integratedSecurity=true";
ConnUrl="jdbc:jtds:sqlserver://" + serverName+ ":" +port+ ";"+ "databaseName=" + databaseName + ";user=" + userName + ";password=" + password + ";";
Connection con =null;
try {
Class.forName("net.sourceforge.jtds.jdbc.Driver").newInstance();
con = DriverManager.getConnection(ConnUrl);
//con = DriverManager.getConnection(conny);
//""+"jdbc:jtds:sqlserver://127.0.0.1/shoprite; integrated security=true"
// Establishing the connection
//con = DriverManager.getConnection(getConnectionUrl());
//con = DriverManager.getConnection(ConnUrl);
if(con != null){
System.out.println("Connection Successful!");
}
else{
System.out.println(" no Connection ");
}
}catch(SQLException se){
Log.e("ERROR--",se.getMessage());
Log.e("ERROR--",se.getSQLState());
Log.e("ERROR--",se.getLocalizedMessage());
Log.e("ERROR--",se.getCause().toString());
Log.e("ERROR--",se.getStackTrace().toString());
}catch(ClassNotFoundException se){
Log.e("ERROR--",se.getMessage());
Log.e("ERROR--",se.getLocalizedMessage());
}catch(Exception se){
Log.e("ERROR--",se.getMessage());
Log.e("ERROR--",se.getLocalizedMessage());
}
return con;
}
public boolean verifyCustomer(String username,String password)throws SQLException{
Connection con1;
ResultSet resultSet = null;
String query = "select * from Customer_Details where Customer_Name =? and Password=?";
try {
con1 = getConnection();
PreparedStatement stmt = con1.prepareStatement(query,ResultSet.TYPE_SCROLL_INSENSITIVE,ResultSet.CONCUR_READ_ONLY);
stmt.setString(1, username);
stmt.setString(2, password);
resultSet = stmt.executeQuery();
if(resultSet.next()){
return true;
}else{
return false;
}
}catch(Exception e){
return false;
} finally {
if(resultSet != null)
resultSet.close();
}
}
public boolean verifyEmployee(String username,String password)throws SQLException{
Connection con1;
ResultSet resultSet = null;
String query = "select * from Employee_Details where Employee_Name =? and Designation=?";
try {
con1 = getConnection();
PreparedStatement stmt = con1.prepareStatement(query,ResultSet.TYPE_SCROLL_INSENSITIVE,ResultSet.CONCUR_READ_ONLY);
stmt.setString(1, username);
stmt.setString(2, password);
resultSet = stmt.executeQuery();
if(resultSet.next()){
return true;
}else{
return false;
}
}catch(Exception e){
return false;
} finally {
if(resultSet != null)
resultSet.close();
}
}
public boolean insertDataCustomer(String name, String gender,String address,int phone,
String DOB,String password,String email,int creditcard,String creditCardType){
Connection con1;
String query = "insert into Customer_Details(Customer_Name,Gender,Address,Phone,DOB,Password,CreditCardNo,CreditCardType) values( ?, ?, ?, ?,?,?,?,?)";
try {
con1 = getConnection();
PreparedStatement stmt = con1.prepareStatement(query);
stmt.setString(1, name);
stmt.setString(2, gender);
stmt.setString(3, address);
stmt.setInt(4, phone);
stmt.setString(5, DOB);
stmt.setString(6, password);
//stmt.setString(7, email);
stmt.setInt(7, creditcard);
stmt.setString(8, creditCardType);
long ent= stmt.executeUpdate();
if(ent == -1)
return false;
else
return true;
}catch(Exception e){
// System.out.println(e.getMessage());
Log.e( "error here: ",e.getMessage());
Log.e( "error here: ",e.getLocalizedMessage());
Log.e( "error here: ",e.getCause().toString());
return false;
}
}
public boolean insertDataEmployee(String ID, String name, String gender,
String DOB,String Designation,String address,String email,String phone){
Connection con1;
String query = "insert into Employee_Details(ID,name,gender,DOB,Designation,address,email,phone) values(?, ?, ?, ?, ?,?,?,?)";
try {
con1 = getConnection();
PreparedStatement stmt = con1.prepareStatement(query);
stmt.setString(1, name);
stmt.setString(2, gender);
stmt.setString(3, DOB);
stmt.setString(4, Designation);
stmt.setString(5, address);
stmt.setString(6, email);
stmt.setString(7, phone);
long ent= stmt.executeUpdate();
if(ent == -1)
return false;
else
return true;
}catch(Exception e){
// System.out.println(e.getMessage());
Log.e( "error here: ",e.getMessage());
return false;
}
}
public void veiwOrders()throws SQLException{
Connection con1;
ResultSet resultSet = null;
String query = "select * from Order_Details";
try {
con1 = getConnection();
PreparedStatement stmt = con1.prepareStatement(query,ResultSet.TYPE_SCROLL_INSENSITIVE,ResultSet.CONCUR_READ_ONLY);
resultSet = stmt.executeQuery();
if(resultSet.next()){
while(resultSet.next()){
}
}
}catch(Exception e){
//return false;
} finally {
if(resultSet != null)
resultSet.close();
}
}
}
下面是我的活动课 包com.example.abun.shoprite1;
/**
* Created by Abun on 5/12/2018.
*/
import android.app.Activity;
import android.app.ProgressDialog;
import android.support.annotation.RequiresPermission.Write;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.MenuItem;
import android.os.AsyncTask;
import android.support.design.widget.NavigationView;
import android.content.Intent;
//import android.app.ActionBar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.view.View;
import android.support.v7.app.ActionBar;
import android.widget.Toast;
import java.io.InputStream;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.util.ArrayList;
public class productPage extends AppCompatActivity {
private RecyclerView mRecycler;
private RecyclerView.LayoutManager mLayoutManager;
private RecyclerView.Adapter mAdapter;
private DrawerLayout mDrawerLayout;
private ArrayList<String> mData;
private ArrayList<ProductPageRetrive> data;
ConnectionClass db;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.productpage1);
db = new ConnectionClass();
data = new ArrayList<ProductPageRetrive>();
mData = new ArrayList<>();
for (int i = 0;i<30;i++){
mData.add("new title"+i);
}
SyncData orderData = new SyncData();
orderData.execute("");
mRecycler = (RecyclerView) findViewById(R.id.recycler_view);
mRecycler.setHasFixedSize(true);
mLayoutManager = new LinearLayoutManager(productPage.this,LinearLayoutManager.HORIZONTAL,false);
mRecycler.setLayoutManager(mLayoutManager);
mAdapter = new MainAdapter(data,productPage.this);
mRecycler.setAdapter(mAdapter);
Toolbar toolbar = findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
ActionBar actionbar = getSupportActionBar();
actionbar.setDisplayHomeAsUpEnabled(true);
actionbar.setHomeAsUpIndicator(R.mipmap.ic_launcher);
mDrawerLayout = findViewById(R.id.drawer_layout);
mDrawerLayout.addDrawerListener(
new DrawerLayout.DrawerListener() {
@Override
public void onDrawerSlide(View drawerView, float slideOffset) {
// Respond when the drawer's position changes
}
@Override
public void onDrawerOpened(View drawerView) {
// Respond when the drawer is opened
}
@Override
public void onDrawerClosed(View drawerView) {
// Respond when the drawer is closed
}
@Override
public void onDrawerStateChanged(int newState) {
// Respond when the drawer motion state changes
}
}
);
NavigationView navigationView = findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(
new NavigationView.OnNavigationItemSelectedListener() {
@Override
public boolean onNavigationItemSelected(MenuItem menuItem) {
// set item as selected to persist highlight
menuItem.setChecked(true);
// close drawer when item is tapped
mDrawerLayout.closeDrawers();
// Add code here to update the UI based on the item selected
// For example, swap UI fragments here
return true;
}
});
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
mDrawerLayout.openDrawer(GravityCompat.START);
return true;
}
return super.onOptionsItemSelected(item);
}
private class SyncData extends AsyncTask<String ,String,String>{
String msg="Internet/DB_Credentials/Windows_FireWall_TurnOn Error, see android monitor in the buttom for details";
ProgressDialog progress;
boolean success = false;
@Override
protected void onPreExecute(){
progress = ProgressDialog.show(productPage.this,"Synchronising","RecyclerView loading! please wait...",true);
}
@Override
protected String doInBackground(String...strings){
try {
Connection con = db.getConnection();
ResultSet resultSet = null;
if (con == null) {
msg="No Data found";
success = false;
}else{
String query = "SELECT * FROM Product_Details";
PreparedStatement stmt = con.prepareStatement(query, ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_READ_ONLY);
resultSet = stmt.executeQuery();
while (resultSet.next()) {
try {
data.add(new ProductPageRetrive(resultSet.getBinaryStream("Image"), resultSet.getInt("Price"), resultSet.getInt("Discount")));
}catch(Exception ex){
ex.printStackTrace();
}
}
msg ="found";
success=true;
}
}catch(Exception e){
e.printStackTrace();
//Write write = new StringWriter();
//e.printStackTrace(new PrintWriter(write));
//msg=writer.toString();
success=false;
}
return msg;
}
@Override
protected void onPostExecute(String msg){
progress.dismiss();
Toast.makeText(productPage.this,msg+"",Toast.LENGTH_LONG).show();
if(success == true){
mAdapter.notifyDataSetChanged();
}else{
try{
}catch (Exception e){
}
}
}
}
}
是数组数据的数据对象； 包com.example.abun.shoprite1;
import java.io.InputStream;
import java.sql.Blob;
import java.sql.ResultSet;
/**
* Created by Abun on 6/14/2018.
*/
public class ProductPageRetrive {
private int price;
private int rating;
private String img1;
private InputStream ism;
private ResultSet rs;
public ProductPageRetrive(InputStream is, int money, int rate){
this.ism=is;
this.price=money;
this.rating=rate;
}
public int getRating() {
return rating;
}
public void setRating(int rating) {
this.rating = rating;
}
public int getPrice() {
return price;
}
public void setPrice(int price) {
this.price = price;
}
public String getImg1() {
return img1;
}
public void setImg1(String img1) {
this.img1 = img1;
}
public InputStream getIsm() {
return ism;
}
public void setIsm(InputStream ism) {
this.ism = ism;
}
}
下面是我的适配器类 包com.example.abun.shoprite1;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.support.v7.widget.RecyclerView;
import android.util.Base64;
import java.io.FileOutputStream;
import android.view.LayoutInflater;
import android.view.ViewGroup;
import android.view.View;
import android.widget.ImageView;
import android.widget.TextView;
import java.io.File;
import java.io.InputStream;
import java.io.OutputStream;
import java.sql.Blob;
import java.sql.SQLException;
import java.util.ArrayList;
import com.squareup.picasso.Picasso;
import android.content.Context;
/**
* Created by Abun on 6/13/2018.
*/
public class MainAdapter extends RecyclerView.Adapter<MainAdapter.ViewHolder> {
private ArrayList<String> mData;
private ArrayList<ProductPageRetrive> Data;
private Context ct1;
public MainAdapter(ArrayList<String> Data1){
this.mData=Data1;
}
public MainAdapter(ArrayList<ProductPageRetrive> Data, Context ct)
{
this.Data=Data;
this.ct1 =ct;
}
@Override
public MainAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext())
.inflate(R.layout.contain,parent,false);
// set the view size, margin,padding and layout parameters
ViewHolder vh = new ViewHolder(v);
return vh;
}
@Override
public void onBindViewHolder(MainAdapter.ViewHolder holder, int position) {
int py =Data.get(position).getRating();
String pp = py +"";
holder.mtitle.setText(pp);
try {
InputStream is = Data.get(position).getIsm();
OutputStream os = new FileOutputStream(new File("photo1.jpg"));
byte[] content = new byte[1024];
int size = 0;
while((size=is.read(content))!=-1){
os.write(content,0,size);
}
os.close();
is.close();
//Picasso.get().load("file:photo1.jpg").into(holder.img);
Picasso.get().load("file:photo1.jpg").into(holder.img);
}catch (Exception e){
}
/*byte[] decorde = Base64.decode(Data.get(position).getImg1(),Base64.DEFAULT);
Bitmap mp = BitmapFactory.decodeByteArray(decorde,0,decorde.length);
holder.img.setImageBitmap(mp);*/
}
@Override
public int getItemCount() {
return Data.size();
}
public class ViewHolder extends RecyclerView.ViewHolder{
public TextView mtitle;
public TextView mtitle1;
public ImageView img;
public View layout;
public ViewHolder(View itemView){
super(itemView);
layout = itemView;
mtitle = (TextView) itemView.findViewById(R.id.mtitle);
img = (ImageView) itemView.findViewById(R.id.imaging);
}
}
}