【发布时间】：2020-08-06 11:58:37
【问题描述】：
package com.example.workdb;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import androidx.appcompat.app.AppCompatActivity;
import android.os.AsyncTask;
import android.os.StrictMode;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.os.Bundle;
import android.widget.TextView;
import org.w3c.dom.Text;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import net.sourceforge.jtds.jdbc.*;
public class MainActivity extends AppCompatActivity {
public Button run;
public TextView message;
public TextView txtvw;
public Connection con;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
run= (Button) findViewById(R.id.button);
run.setOnClickListener(new View.OnClickListener() {
public void onClick(View v)
{
CheckLogin checkLogin= new CheckLogin();
checkLogin.execute("");
Log.d("CREATION","ON CREATE WORKS");
// Log.d("txtvw", connection);
//System.out.println("Yes");
// txtvw.setText("hello");
}
});
} public class CheckLogin extends AsyncTask<String,String,String>
{
String z="";
Boolean IsSuccess= false;
String name1="";
// Log.d("txtvw","step 1 done");
protected void onPostExecute(String r){
if (IsSuccess){
message=(TextView)findViewById(R.id.textView);
message.setText(name1);
Log.d("TAG", "STEP 1 DONE");
}
}
@Override
protected String doInBackground(String... strings) {
try
{
Connection con = connectionClass();
if(con==null){
z="Check interent";
//Log.d("txtvw", z);
}
else
{
String query= "select * from Value";
Statement stmt= con.createStatement();
ResultSet rs= stmt.executeQuery(query);
if (rs.next())
{
name1=rs.getString("KneeAngle");
Log.d("MYTAG", "name 1 works");
z="Query success";
IsSuccess=true;
con.close();
}
else{
z="Invalid query";
IsSuccess=false;
}
}
} catch (SQLException e) {
e.printStackTrace();
}
return z;
}
}
public Connection connectionClass(){
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
Connection connection = null;
String ConnectionURL ;
try{
Class.forName("net.sourceforge.jtds.jdbs.Driver");
ConnectionURL="jdbc:jtds:sqlserver://havvasemserv3.database.windows.net:1433;DatbaseName=Newfin;user=;password= ;encrypt=true;trustServerCertificate=false;hostNameInCertificate=*.database.windows.net;loginTimeout=30";
connection= DriverManager.getConnection(ConnectionURL);
} catch(ClassNotFoundException e){
Log.e("Error here 2 ",e.getMessage());
}
catch (Exception e) {
Log.e("error here 3:",e.getMessage());
}
//Log.d("txtvw", connection);
return connection;
}
}
我正在尝试将 azure sql 数据库连接到 android studio。我已经在清单文件中添加了所有权限，并且我还在项目中添加了一个 jtds 模块 1.3.1 并在 gradle 模块应用程序中实现了它。我的代码以 0 个错误退出，但数据未显示在模拟器上。预期输出是我数据库中的第一个值，即“8”。 谢谢。，
【问题讨论】：
标签： android azure android-studio jdbc azure-sql-database