android显示出mysql数据库信息

<TextView
    android:id="@+id/databaseInfo"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:textSize="20sp" />

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

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

public class MainActivity extends AppCompatActivity {

    private TextView databaseInfo;

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

        databaseInfo = findViewById(R.id.databaseInfo);

        // 连接到 MySQL 数据库并执行查询操作
        new ConnectToMySQL().execute();
    }

    private class ConnectToMySQL extends AsyncTask<Void, Void, String> {

        @Override
        protected String doInBackground(Void... params) {
            try {
                // 加载 MySQL 驱动
                Class.forName("com.mysql.jdbc.Driver");

                // 建立数据库连接
                Connection connection = DriverManager.getConnection(
                        "jdbc:mysql://your_mysql_server_address:your_mysql_server_port/your_database_name",
                        "your_username",
                        "your_password");

                // 创建 Statement 对象
                Statement statement = connection.createStatement();

                // 执行查询语句
                ResultSet resultSet = statement.executeQuery("SELECT * FROM your_table_name");

                // 处理查询结果
                StringBuilder result = new StringBuilder();
                while (resultSet.next()) {
                    String column1 = resultSet.getString("column1");
                    String column2 = resultSet.getString("column2");
                    // ... 其他列

                    result.append("column1: ").append(column1).append("\n")
                            .append("column2: ").append(column2).append("\n\n");
                    // ... 其他列
                }

                // 关闭数据库连接
                resultSet.close();
                statement.close();
                connection.close();

                return result.toString();

            } catch (Exception e) {
                e.printStackTrace();
                return "Failed to retrieve database information.";
            }
        }

        @Override
        protected void onPostExecute(String result) {
            // 将查询结果显示在 TextView 上
            databaseInfo.setText(result);
        }
    }
}