What is the best way to connect between android and oracle database?

Question

I need to access data from an external oracle database from my application android to update the local database application, but I don\'t know what would be the best way to

Answer 1

ORACLE DATABASE CONNECTION WITH ANDROID THROUGH LAN

Grant Some Manifest Permissions

MainActivity Class

    package example.com.myapplication;

    import java.sql.Connection;
    import java.sql.DriverManager;
    import android.os.StrictMode;

    public class MainActivity extends AppCompatActivity {

    private static final String DEFAULT_DRIVER = "oracle.jdbc.driver.OracleDriver";
    private static final String DEFAULT_URL = "jdbc:oracle:thin:@192.168.0.1:1521:xe";
    private static final String DEFAULT_USERNAME = "system";
    private static final String DEFAULT_PASSWORD = "oracle";

    private Connection connection;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        if (android.os.Build.VERSION.SDK_INT > 9) {
            StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
            StrictMode.setThreadPolicy(policy);
        }

        TextView tv = (TextView) findViewById(R.id.hello);


                try {
                    this.connection = createConnection();
                    e.Log("Connected");
                    Statement stmt=connection.createStatement();

                    ResultSet rs=stmt.executeQuery("select * from cat");
                    while(rs.next()) {
                        System.out.println("hello : " + rs.getString(1));
                    }
                    connection.close();
                }
                catch (Exception e) {
                    e.Log(""+e);
                    e.printStackTrace();
                }
            }

            public static Connection createConnection(String driver, String url, String username, String password) throws ClassNotFoundException, SQLException {

                Class.forName(driver);
                return DriverManager.getConnection(url, username, password);
            }

            public static Connection createConnection() throws ClassNotFoundException, SQLException {
                return createConnection(DEFAULT_DRIVER, DEFAULT_URL, DEFAULT_USERNAME, DEFAULT_PASSWORD);
            }
        }

Prerequisite are: Note there is no need to add dependency lib ojdbc14.jar just copy ojdbc14.jar to your JAVA_HOME jre -> lib -> ext & paste here ojdbc14.jar then first manually check jdbc connection by cmd/terminal make any simple java program http://www.javatpoint.com/example-to-connect-to-the-oracle-database