通過反射的方式全局獲取Application實例

import android.app.Application;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

public class ContextUtils {
    public static Application getApplication(){
        try {
            Method method = Class.forName("android.app.ActivityThread").getDeclaredMethod("currentApplication");
            return (Application) method.invoke(null, null);
        } catch (NoSuchMethodException e) {
            e.printStackTrace();
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        } catch (InvocationTargetException e) {
            e.printStackTrace();
        }

        return null;
    }
}