Question

在android中我试图在预定义的时间访问数据库。在我的应用程序中，它运行一个简单的Android服务，我希望在特定时间检查外部数据库（MySQL）。我正在使用java Web服务来访问数据库。

public class DBService extends Service {

private static final String SOAP_ACTION = "http://dbconnectivity.com/test/";
private static final String METHOD_NAME = "test";
private static final String NAMESPACE = "http://dbconnectivity.com";
private static final String URL = "http://10.0.2.2:8089/DB_Connectivity/services/SqlConnectivity?wsdl";
String str;
@Override
public IBinder onBind(Intent intent) {
    // TODO Auto-generated method stub
    return null;
}

@Override
public void onCreate() {
    super.onCreate();

    //Toast.makeText(this, "Test", Toast.LENGTH_LONG).show();
    SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME);          
    request.addProperty("time",0);
    SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);

    envelope.setOutputSoapObject(request);

    HttpTransportSE ht = new HttpTransportSE(URL);
    try {
        ht.call(SOAP_ACTION, envelope);
        SoapPrimitive response = (SoapPrimitive)envelope.getResponse();

        SoapPrimitive s = response;
        str = s.toString();

    } catch (Exception e) {
        e.printStackTrace();
    }
    Toast.makeText(this, "Test "+str, Toast.LENGTH_LONG).show();
}

@Override
public void onDestroy() {
    super.onDestroy();
    Toast.makeText(this, "Service destroyed ...", Toast.LENGTH_LONG).show();
}

}

如何完成这项任务？

Answer 1

查看AlarmManager类或检查this教程并在指定时间运行http poll到mysql服务器（你需要一些php脚本来返回MySQL的结果，因为android不支持直接数据库连接）

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