Question

Parcelable文档说CREATOR字段必须是静态的，但当我尝试以这种方式实现它时，我得到错误＆＃34;内部类不能有静态声明＆＃34;。

我试图通过将CategoryButton放在一个单独的类中来解决此问题（不将其声明为MainActivity中的内部类），但我无法调用getApplicationContext()传递给super的构造函数。

public class MainActivity extends ActionBarActivity {


    private class CategoryButton extends Button implements Parcelable{
        private ArrayList<CategoryButton> buttons = null;
        private RelativeLayout.LayoutParams params = null;
        public CategoryButton(Context context){
            super(context);
        };
        public void setButtons(ArrayList<CategoryButton> buttons){
            this.buttons = buttons;
        }
        public void setParams(RelativeLayout.LayoutParams params){
            this.params = params;
        }
        public ArrayList<CategoryButton> getButtons(){
            return this.buttons;
        }
        public RelativeLayout.LayoutParams getParams(){
            return this.params;
        }



        public int describeContents() {
            return 0;
        }
        public void writeToParcel(Parcel out, int flags) {
            out.writeList(buttons);
        }
        public static final Parcelable.Creator<CategoryButton> CREATOR // *** inner classes cannot have static declarations
                = new Parcelable.Creator<CategoryButton>() {
            public CategoryButton createFromParcel(Parcel in) {
                return new CategoryButton(in); // *** 'package.MainActivity.this' cannot be referenced from a static context
            }

            public CategoryButton[] newArray(int size) {
                return new CategoryButton[size];
            }
        };

        private CategoryButton(Parcel in) {
            super(getApplicationContext());
            in.readList(buttons, null);
        }

    }

// ...other activity code

Answer 1

您需要将CategoryButton设置为内部静态，即

private static class CategoryButton extends Button implements Parcelable {
    ...

无法实现Parcelable，因为我无法使CREATOR字段保持静态

1 个答案: