MySQL Nutzen für Android App

W/System.err: java.sql.SQLException: No suitable driver
W/System.err:     at java.sql.DriverManager.getConnection(DriverManager.java:186)
W/System.err:     at java.sql.DriverManager.getConnection(DriverManager.java:213)
W/System.err:     at mysql.germandev.de.ultimate_stupedia.MySQL.connect(MySQL.java:34)
W/System.err:     at mysql.germandev.de.ultimate_stupedia.MySQL.<init>(MySQL.java:21)
W/System.err:     at germandev.de.ultimate_stupedia.MainActivity.onCreate(MainActivity.java:30)
W/System.err:     at android.app.Activity.performCreate(Activity.java:5458)
W/System.err:     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1093)
W/System.err:     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2376)
W/System.err:     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2470)
W/System.err:     at android.app.ActivityThread.access$900(ActivityThread.java:174)
W/System.err:     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1307)
W/System.err:     at android.os.Handler.dispatchMessage(Handler.java:102)
W/System.err:     at android.os.Looper.loop(Looper.java:146)
W/System.err:     at android.app.ActivityThread.main(ActivityThread.java:5593)
W/System.err:     at java.lang.reflect.Method.invokeNative(Native Method)
W/System.err:     at java.lang.reflect.Method.invoke(Method.java:515)
W/System.err:     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1283)
W/System.err:     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1099)
W/System.err:     at dalvik.system.NativeStart.main(Native Method)
I/System.out: [MySQL] Verbinden fehlgeschlagen!

package mysql.germandev.de.ultimate_stupedia;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

import butterknife.ButterKnife;

public class MySQL {
    private String host = "privat";
    private String database = "privat;
    private String user = "privat";
    private String password = "privat";

    private Connection con;

    public MySQL() {

        connect();
    }

    public MySQL(String host, String database, String user) {
        this.host = host;
        this.database = database;
        this.user = user;

        connect();
    }

    public void connect() {
        try {
            con = DriverManager.getConnection("jdbc:mysql://" + host + ":3306/" + database + "?autoReconnect=true", user, password);
            System.out.println("[MySQL] Erfolgreich verbunden.");
        } catch (SQLException ex) {
            ex.printStackTrace();
            System.out.println("[MySQL] Verbinden fehlgeschlagen!");
        }
    }

    public void close() {
        try {
            if(con != null) {
                con.close();
            }
        } catch(SQLException ex) {
            ex.printStackTrace();
        }
    }

    public ResultSet query(String qry) {
        ResultSet rs = null;

        try {
            Statement st = con.createStatement();
            rs = st.executeQuery(qry);
        } catch(SQLException ex) {
            connect();
            ex.printStackTrace();
        }

        return rs;
    }

    public void update(String qry) {
        try {
            Statement st = con.createStatement();
            st.executeUpdate(qry);
            st.close();
        } catch(SQLException ex) {
            connect();
            ex.printStackTrace();
        }
    }

    public Connection getConnection(){
        return con;

    }

}

package germandev.de.ultimate_stupedia;

import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.TextView;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;

import butterknife.ButterKnife;
import butterknife.OnClick;
import mysql.germandev.de.ultimate_stupedia.MySQL;

import static germandev.de.ultimate_stupedia.R.layout.activity_kategories;

public class MainActivity extends AppCompatActivity {

    public static boolean connected;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ButterKnife.bind(this);
        TextView view = (TextView) findViewById(R.id.main_connect);
        new MySQL();

        if(connected == false) {
            view.setText("Keine Internetverbindung");
        } else {
            view.setCursorVisible(false);
        }
    }

    @OnClick(R.id.main_kategories)
    void klickKategories() {
        setContentView(activity_kategories);
    }

}