在四大主件以外的类中 怎么使用Context

1.自定义一个类.
public class MyApplication extends Application {
private static Context context;

@Override
public void onCreate() {
// TODO Auto-generated method stub
context= getApplicationContext();
}


public static Context getContext() {
return context;
}

public static void setContext(Context context) {
MyApplication.context = context;
}

}

2.在AndroidManifest.xml中修改

3.3.在调用的时候:MyApplication.getContext();