通過點擊一個按鈕,我想執行一個選擇查詢來顯示一些結果,我使用Internet權限和AsyncTask以及我的PC的地址ip來執行此調用,但它不適用於我,還有日誌不顯示我什麼弄清楚這個問題,這是代碼:Android與Oracle數據庫的連接
清單文件:
<uses-permission android:name="android.permission.INTERNET"/>
的Android PROGRAMM:
package com.ammach.oraclecon;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.TextView;
import android.widget.Toast;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
public class MainActivity extends AppCompatActivity {
class Task extends AsyncTask<Void,Void,String>{
@Override
protected String doInBackground(Void... params) {
String param="mal9a walou";
String driver="oracle.jdbc.driver.OracleDriver";
String bd="ORCL";
String user="SYSTEM";
String passwd="SYSTEM";
String port="1521";
String ip="192.168.1.7";
String url="jdbc:oracle:thin:@"+ip+":"+port+":"+bd;
Connection con=null;
try {
Class.forName(driver);
con = DriverManager.getConnection(url, user, passwd);
Log.e("coooon", "coooon");
Statement st=con.createStatement();
Log.e("Statement", "Statement");
ResultSet resultSet = st.executeQuery("select * from auteur");
Log.e("ResultSet", "ResultSet");
Log.e("con", "You made it, take control your database now!");
if(resultSet.next()){
param=resultSet.getString("nom");
Log.e("dkhal", "rah dkhal");
}else{
Log.e("walou", "walou");
}
} catch (SQLException | ClassNotFoundException e) {
e.printStackTrace();
}
return param;
}
@Override
protected void onPostExecute(String param) {
super.onPostExecute(param);
textView.setText(param);
Toast.makeText(MainActivity.this, "finished", Toast.LENGTH_SHORT).show();
}
}
TextView textView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
textView= (TextView) findViewById(R.id.txt);
}
public void fetchOracle(View view) {
new Task().execute();
Toast.makeText(MainActivity.this, "starting", Toast.LENGTH_SHORT).show();
}
}
我鋁所以在Netbeans的一個簡單的java項目(void main)中運行相同的過程,它完美的工作,我嘗試了很多次的Android應用程序,但我失敗了,有人可以幫我解決這個問題。
這是Java PROGRAMM:
String param = "nothing";
String driver = "oracle.jdbc.driver.OracleDriver";
String bd = "ORCL";
String user = "SYSTEM";
String passwd = "SYSTEM";
String port = "1521";
String ip = "localhost";
String url = "jdbc:oracle:thin:@" + ip + ":" + port + ":" + bd;
Connection con = null;
try {
Class.forName(driver);
con = DriverManager.getConnection(url, user, passwd);
Statement st = con.createStatement();
ResultSet resultSet = st.executeQuery("select * from auteur");
if (resultSet.next()) {
param = resultSet.getString("nom");
} else {
System.out.println("no result");
}
System.out.println("nom: "+param);
} catch (SQLException | ClassNotFoundException e) {
e.printStackTrace();
}
你是在一個真正的android設備或模擬器? –
在一個真實的設備上 –