Question

我应该在下面的自定义对话框类中重构代码。

import android.app.Activity;
import android.content.Intent;
import android.support.v4.app.DialogFragment;
import android.support.v4.app.Fragment;
import android.util.Log;

public class BaseDialogFragment extends DialogFragment {
    public BaseActivity parentActivity;

    protected void showMessage(String title, String message) {
        MessageDialogFragment dialog = MessageDialogFragment.newInstance(title, message);
        dialog.setCancelable(false);
        dialog.show(parentActivity.getSupportFragmentManager(), MessageDialogFragment.TAG);
    }

    //...

    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (getChildFragmentManager().getFragments() != null) {
            for (Fragment fragment : getChildFragmentManager().getFragments()) {
                if (fragment != null) {
                    fragment.onActivityResult(requestCode, resultCode, data);
                }
            }
        }
    }
}

我想转换它：

android.support.v4.app.DialogFragment;
android.support.v4.app.Fragment;

为：

android.app.DialogFragment;
android.app.Fragment;

我无法正确地重写这个：

for (Fragment fragment : getChildFragmentManager().getFragments()) {
                if (fragment != null) {
                    fragment.onActivityResult(requestCode, resultCode, data);
                }
            }

请告诉我该怎么做。

Answer 1

我找到工作解决方案，但我并不完全确定。我想看看你的意见。

在此处添加列表片段：

private List<WeakReference<Fragment>> fragList = new ArrayList<>();

    public List<Fragment> getActiveFragments() {
        ArrayList<Fragment> ret = new ArrayList<>();
        for (WeakReference<Fragment> ref : fragList) {
            Fragment f = ref.get();
            if (f != null) {
                if (f.isVisible()) {
                    ret.add(f);
                }
            }
        }
        return ret;
    }

    @Override
    public void onAttach(Activity act) {
        super.onAttach(act);
        if (act instanceof BaseActivity) {
            parentActivity = (BaseActivity) act;
            fragList.add(new WeakReference(getActiveFragments()));
        }
    }

我在这里重构：

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (getChildFragmentManager().getBackStackEntryCount() > 0) {
        for (WeakReference<Fragment> fragmentWeakReference : fragList) {
            fragmentWeakReference.get().onActivityResult(requestCode, resultCode, data);
        }
    }
}

应该将android.support.v4.app.DialogFragment重构为android.app.DialogFragment

1 个答案: