Android的服务没有设置初始化变量 [英] Android Service not initializing variables from settings

问题描述

我正在与我的应用程序的问题，我似乎无法弄清楚。

I am running into a problem with my application that I cannot seem to figure out.

应用程序具有启动手机启动时，或者如果它已经停止，当一切完成之前的主要活动是运行启动的服务。

The application has a service that starts when the phone starts, or if it has been stopped, starts when the main activity is run before everything else is done.

在活动的onCreate我有：

In the activity's onCreate I have:

serviceIntent.setClass(this, Service.class);
bindService(serviceIntent, mConnection, Context.BIND_AUTO_CREATE);
startService(serviceIntent);
WriteDisplay();

public void WriteDisplay(){
TextView t = (TextView)findViewById(R.id.tv1);
String strdisplay = Service.getDisplay();
t.setText(strdisplay);
}

在服务我有：

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

}
public static String getDisplay() {
    return display;
}

的getSettings填充一个从settings.xml文件中返回getDisplay（）的显示的值

GetSettings populates the value of display that is returned in getDisplay() from a settings.xml file.

然而，当我加载在活动的任何code将其简单地失败，并返回只是空值。

However when I load up any code in the activity it simply fails and returns nothing but null values.

我有调用DrawCanvas屏幕上的刷新按钮（）;再次，如果我打刷新按钮，它能够正确地抓住所有的变量和处理code。

I have a refresh button on the screen that invokes DrawCanvas(); again, and if I hit the refresh button it is able to grab all the variables properly and processes the code.

我不明白，为什么变量没有装上活动的第一次运行，但正确加载，当我打的刷新按钮。

I don't understand why the variables are not loaded on the first run of the activity, but loads properly when I hit the refresh button.

推荐答案

绑定到一个服务是一个异步操作。你必须等待，直到绑定完成后，然后调用服务方法。看看 ServiceConnection.onServiceConnected（）方法。它有一个的IBinder 参数。当这个方法被调用时，你可以投装订器的实际类型，并调用它的方法。

Binding to a service is an asynchronous operation. You have to wait until the binding is finished and then call service methods. Take a look at ServiceConnection.onServiceConnected() method. It has an IBinder argument. When this method is called you can cast binder to its actual type and call its methods.

下面是一个指导开发势必服务：的http：//开发商。 android.com/guide/topics/fundamentals/bound-services.html

Here's a guide to developing bound services: http://developer.android.com/guide/topics/fundamentals/bound-services.html

您应仔细阅读并以类似的方式实现你的服务。

You should read it carefully and implement your service in a similar way.

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