android - 方向更改后恢复 ActionMode

Question

我有启动 Action 模式的列表 fragment 。我正在使用 actionbarsherlock。但是当方向改变时，或者当我开始新的 Activity 时，上下文操作栏就会消失。有什么方法可以恢复它，而无需重新启动它吗？在 google gmail 应用程序中，无论我旋转手机还是转到详细信息屏幕，它都会停留在屏幕上。

Answer 1

更好的方法是使用 onSaveInstanceState 在旋转之前保存 ActionMode 状态。

public abstract class MyActivity extends SherlockFragmentActivity{

    private boolean isInActionMode = false;

    @Override
    public void onCreate(Bundle state){
         super.onCreate(state);

         if (state != null && state.getBoolean("ActionMode", false)){
                startActionMode(new MyActionMode());
         }else{
             ///whatever you'd normally do
         }
    }

    @Override
    public void onSaveInstanceState(Bundle outState) {
         // Save isInActionMode value
         outState.putBoolean("ActionMode", isInActionMode);

         super.onSaveInstanceState(outState);
    }

    public void onWhateverEventNormallyStartsYourActionMode(){
        startActionMode(new MyActionMode());
    }

    public class MyActionMode implements ActionMode.Callback{

        @Override
        public boolean onCreateActionMode(ActionMode mode, Menu menu) {
            isInActionMode = true;
            ///whatever you'd normally do
        }

        @Override
        public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
            ///whatever you'd normally do
        }

        @Override
        public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
            ///whatever you'd normally do
        }

        @Override
        public void onDestroyActionMode(ActionMode mode) {
            isInActionMode = false;
        }
    }
}

根据 Saran 的评论更新。