Actionbar选项卡的FragmentTransaction .attach和.detach

Question

我试图让代码在这里工作.它汇编很好.它会运行.它将加载选项卡1(3).但是,当我点击第二或第三个标签时,我得到了这个:

java.lang.NoSuchMethodError:android.app.FragmentTransaction.detach

这发生在这里的代码中

public void onTabUnselected(Tab tab, FragmentTransaction ft) {
    if (mFragment != null) {
        //ft.detach(mFragment); //requires API Level 13
        ft.remove(mFragment); //this does not do the same thing as detach
    }
}

我发现分离仅适用于API级别13.我尝试删除,但显然不会做同样的事情.有没有人对如何根据第一个链接中的代码克服这个问题有任何想法？

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编辑:我想同样适用于附加,因为它也在代码中,但在应用程序崩溃之前不会被击中.

Answer 1

看来,通过添加和删除替换引用附加和分离的代码中的几个位置将允许代码在API级别13之前的环境中正常运行.

    public TabListener(Activity activity, String tag, Class<T> clz, Bundle args) {
        mActivity = activity;
        mTag = tag;
        mClass = clz;
        mArgs = args;

        // Check to see if we already have a fragment for this tab, probably
        // from a previously saved state.  If so, deactivate it, because our
        // initial state is that a tab isn't shown.
        mFragment = mActivity.getFragmentManager().findFragmentByTag(mTag);
        if (mFragment != null) { // && !mFragment.isDetached()) {
            FragmentTransaction ft = mActivity.getFragmentManager().beginTransaction();
            //ft.detach(mFragment);
            ft.remove(mFragment);
            ft.commit();
        }
    }

    public void onTabSelected(Tab tab, FragmentTransaction ft) {
        //if (mFragment == null) {
            mFragment = Fragment.instantiate(mActivity, mClass.getName(), mArgs);
            ft.add(android.R.id.content, mFragment, mTag);
        //} else {
        //    ft.attach(mFragment);
        //}
    }

    public void onTabUnselected(Tab tab, FragmentTransaction ft) {
        if (mFragment != null) {
            //ft.detach(mFragment); //requires API 13
            ft.remove(mFragment); //this does not do the same thing as detach
        }
    }