java - 如何将值从 Activity 类传递到 android 中的 java 类？

Question

我编写了一个程序，其中我通过 sharedpreferences 放置了一些值并通过 sharedpreferences 获取它，还有一个来自 intent ，并且这些值显示得非常完美，我通过 Toast 对其进行了测试现在我想将这些值存储在 mysql 数据库中，为此我编写了一个普通的 java 类，其中包含 jdbc 准备好的语句，但我无法弄清楚如何将值从我的 Activity 类传递到普通的 java 类

在下面发布我的代码，请告诉我我需要做什么

public class Service_Access extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setContentView(R.layout.service_access);

    // Get Email ID from Shared preferences
    // SharedPreferences prefs = getSharedPreferences("UserDetails",
    // Context.MODE_PRIVATE);
    // String eMailId = prefs.getString("eMailId", "");

    // Get Email ID from Shared preferences
    SharedPreferences prefs = getSharedPreferences("UserDetails", Context.MODE_PRIVATE);
    String eMailId = prefs.getString("eMailId", "");
    String registrationId = prefs.getString("regId", "");
    // Intent Message sent from Broadcast Receiver
    String str = getIntent().getStringExtra("msg");

    if (str != null) {
        // Set the message
        lblMessage = (TextView) findViewById(R.id.txtView);
        lblMessage.setText(str + "\n");
        // Toast.makeText(getBaseContext(), registrationId + "\n" + eMailId
        // + "\n", Toast.LENGTH_LONG).show();
        ServiceSql sersql = new ServiceSql();
        sersql.insertValues(eMailId, registrationId, str);
    }

}

在上面的类中，我获得的值存储在 String str , emailid , registrationid我想在下面的类中设置这些值，prep.setString(1,"") 等等

ServiceSql.java

public class ServiceSql {
Connection connection = null;
PreparedStatement prep = null;
ResultSet rSet = null;
Statement state = null;
java.sql.Timestamp timestamp = getCurrentJavaSqlTimestamp();
Context context;

public static java.sql.Timestamp getCurrentJavaSqlTimestamp() {
    java.util.Date date = new java.util.Date();
    return new java.sql.Timestamp(date.getTime());
}

public void readDatabase() {
    try {

        Class.forName("com.mysql.jdbc.Driver");
        connection = (Connection) DriverManager.getConnection("jdbc:mysql://localhost:3306/gcm",
        "root", "root");
        state = (Statement) connection.createStatement();

        prep = (PreparedStatement) connection
                .prepareStatement("Select email,gcm_regid,created_at,gcm_message from  
        gcm.gcm_users");
        rSet = prep.executeQuery();

    } catch (Exception e) {
        // TODO: handle exception
        e.printStackTrace();
    }
}

public void insertValues(String email, String regID, String msg) {
    try {
        Class.forName("com.mysql.jdbc.Driver");
        connection = (Connection) DriverManager.getConnection("jdbc:mysql://localhost:3306/gcm",
        "root", "root");
        state = (Statement) connection.createStatement();

        prep = (PreparedStatement) connection
                .prepareStatement("insert into 
        gcm.gcm_users(email,gcm_regid,created_at,gcm_message)"
                        + "values(?,?,?,?)");

        prep.setString(1, email);
        prep.setString(2, regID);
        prep.setTimestamp(3, timestamp);
        prep.setString(4, msg);
        prep.executeUpdate();
    } catch (Exception e) {
        // TODO: handle exception
        e.printStackTrace();
    }
}

请帮忙谢谢你

Answer 1

读取其他类中的 sharedPreference 值并将这些值写入数据库中。

SharedPreferences s = SharedMyAPP.getAppContext().getSharedPreferences("myPreferences", Context.MODE_PRIVATE);value = s.getString(key, "");