当我的应用程序进入后台时,我的(静态和单例)对象被清除。 所以我试图将这些对象存储在应用上下文。我正在使用下面的代码。在ApplicationContext中存储对象
Accounts.create(getApplicationContext())将被调用一次以存储帐户实例。
这是可能的(可靠)在应用程序上下文中存储对象?我不确定以下方法是否正确。请指导..
public class Init extends Application {
private Hashtable<Object, Object> globalStore = new Hashtable<Object, Object>();
public void putToGlobalStore(Object key, Object value) {
globalStore.put(key, value);
}
public Object takeFromGlobalStore(Object key) {
return this.globalStore.get(key);
}
public void removeFromGlobalStore(Object key) {
this.globalStore.remove(key);
}
public boolean containsInGlobalStore(Object key) {
return this.globalStore.containsKey(key);
}
}
public class Accounts {
protected Accounts(String name, Context context) {
Init init = (Init) applicationContext;
init.putToGlobalStore(name, this);
}
private static Init applicationContext;
public static void create(Context context) {
if (context instanceof Application)
applicationContext = (Init) context;
else
applicationContext = (Init) context.getApplicationContext();
if (applicationContext.containsInGlobalStore(GLOBAL_NAME))
Logger.log("Warning " + GLOBAL_NAME
+ " is already created. This will remove all old datas");
new Accounts(GLOBAL_NAME, applicationContext);
}
private static final String GLOBAL_NAME = "accounts";
public static Accounts getInstance() {
try {
return (Accounts) applicationContext
.takeFromGlobalStore(GLOBAL_NAME);
} catch (Exception e) {
Logger.log("GLOBAL_NAME Lost");
return null;
}
}
请帮忙。
感谢您的回复。我需要的是在运行时将数据存储在应用程序中 – 2011-04-20 06:28:41