Bonjour,
J'ai vu qu'il y à plusieurs post sur ce thème mais je n'arrive pas à comprendre comment le résoudre.

J’exécute ce code :

Code : Sélectionner tout - Visualiser dans une fenêtre à part
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public class MainActivity extends AppCompatActivity {
 
    private static final String url = "jdbc:mysql://192.168.1.155:3306/***"; //*** = DB.
    private static final String user = "***";
    private static final String pass = "***";
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
            setSupportActionBar(toolbar);
 
            testDB();
        }
 
    public void testDB() {
        TextView tv = (TextView)this.findViewById(R.id.text_view);
        try {
            Class.forName("com.mysql.jdbc.Driver");
            Connection con = DriverManager.getConnection(url, user, pass);
        /* System.out.println("Database connection success"); */
 
            String result = "Database connection success\n";
            Statement st = con.createStatement();
            ResultSet rs = st.executeQuery("select * from personne");
            ResultSetMetaData rsmd = rs.getMetaData();
 
            while(rs.next()) {
                result += rsmd.getColumnName(1) + ": " + rs.getInt(1) + "\n";
                result += rsmd.getColumnName(2) + ": " + rs.getString(2) + "\n";
                result += rsmd.getColumnName(3) + ": " + rs.getString(3) + "\n";
            }
            tv.setText(result);
        }
        catch(Exception e) {
            e.printStackTrace();
            tv.setText(e.toString());
        }
 
    }
}
Et j’obtiens :
com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.