Question

我使用以下代码在警报对话中显示回收者视图。调用方法showAlertDialog（）时，显示屏上会出现一个对话框，但它是空的。包含输出信息的列表不为空，我检查了。

public class AlertDialogShower  {
private final String LOG_TAG = "AlertDialogShower";
private Context context;

public AlertDialogShower(Context context) {
    this.context = context;
}
@RequiresApi(api = Build.VERSION_CODES.HONEYCOMB)
public void showAlertDialog(AppInfoListModel appInfoListModel, FragmentManager fragmentManager) {

    View view = LayoutInflater.from(context).inflate(R.layout.alert_app_workperiod, null);
    RecyclerView recyclerView = (RecyclerView)view.findViewById(R.id.alert_app_info_list_view);
    AppInfoArrayAdapter arrayAdapter = new AppInfoArrayAdapter(appInfoListModel.getAppInfos());
    recyclerView.setAdapter(arrayAdapter);
    AlertDialog.Builder builder = new AlertDialog
            .Builder(new ContextThemeWrapper(view.getContext(), R.style.Theme_AppCompat_Dialog));
    builder.setView(view);

    builder.setCancelable(false)
            .setNegativeButton(view.getContext().getString(R.string.cancel_text), new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    dialog.cancel();
                }
            });

    AlertDialog alertDialog = builder.create();
    alertDialog.setTitle(appInfoListModel.getAppPackage());
    alertDialog.show();


}

/**
 * This is a modified adapter for displaying and processing the list of events in listview
 */
public class AppInfoArrayAdapter extends RecyclerView.Adapter<AppInfoArrayAdapter.AppViewHolder> {
    ArrayList<AppInfoListModel.AppInfo> appInfoList;

    public AppInfoArrayAdapter(ArrayList<AppInfoListModel.AppInfo>  appList) {
        this.appInfoList = appList;
    }

    @Override
    public AppViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
        View v = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.app_info_list_item, viewGroup, false);
        AppViewHolder appViewHolder = new AppViewHolder(v);
        return appViewHolder;
    }

    @Override
    public void onBindViewHolder(AppViewHolder appViewHolder, int i) {
        appViewHolder.periodDay.setText(appInfoList.get(i).getDate());
        String periods = " ";
        for (String s : appInfoList.get(i).getRunningEvents()){
            periods += s + "\n";
        }
        appViewHolder.timeLaunch.setText(periods);
    }


    @Override
    public int getItemCount() {
        return appInfoList.size();
    }

    public class AppViewHolder extends RecyclerView.ViewHolder {
        TextView periodDay;
        TextView timeLaunch;


        AppViewHolder(View v) {
            super(v);
            periodDay = (TextView) v.findViewById(R.id.ai_date_tv);
            timeLaunch = (TextView) v.findViewById(R.id.ai_list_date_tv);

        }
    }
}

}

来自另一个片段的调用。新 AlertDialogShower（fragmentView.getContext（））showAlertDialog（APPINFO，getFragmentManager（））;

Answer 1

您忘了添加带有RecycleView的LayoutManager，这就是它为空的原因。

可选的

//如果您知道更改，请使用此设置来提高性能 //在内容中不会更改RecyclerView的布局大小

mRecyclerView.setHasFixedSize（真）;

需要

//使用线性布局管理器

ExternalProject_Add

警报对话框已清空RecyclerView

1 个答案: