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应该重构android。支持v4.app。DialogFragment到android。应用程序。对话框片段

android-dialogfragment android-fragments android

nicolas asinovich · 技术社区 · 8 年前

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);
                }
            }
        }
    }
}

我想要转换它:

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

收件人:

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

我做不好重写这个:

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

请告诉我怎么做对。

1 回复 | 直到 8 年前

nicolas asinovich 8 年前

我找到了工作解决方案,但我不完全确定。我想看看你的评论。

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()));
        }
    }

这里我重构如下:

@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);
        }
    }
}

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