在CardView

Question

我正在尝试在ReViewView中的CardView中的TextView上动态设置maxLines。

这是我的CardView_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:card_view="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:padding="16dp">

    <android.support.v7.widget.CardView
        android:id="@+id/fragment_advice_cardview_CV_cardview"
        android:layout_width="match_parent"
        android:layout_height="150sp"
        card_view:cardCornerRadius="5sp"
        card_view:cardElevation="5sp"
        card_view:contentPadding="2dp"
        card_view:cardUseCompatPadding="true">


        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:background="@color/green_background"
            android:padding="16sp">

            <ImageView
                android:id="@+id/fragment_advice_cardview_IV_doctor_photo"
                android:layout_width="wrap_content"
                android:layout_height="match_parent"
                android:layout_alignParentStart="true"
                android:layout_alignParentTop="true"
                android:layout_marginEnd="16sp"
                android:adjustViewBounds="true"
                android:maxWidth="150sp"
                android:scaleType="fitCenter"
                android:src="@drawable/batman_logo" />

            <TextView
                android:id="@+id/fragment_advice_cardview_TV_doctor_name"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_alignParentTop="true"
                android:layout_toEndOf="@+id/fragment_advice_cardview_IV_doctor_photo"
                android:text="@string/omg"
                android:textSize="30sp" />

            <TextView
                android:id="@+id/fragment_advice_cardview_TV_doctor_advice"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:layout_below="@+id/fragment_advice_cardview_TV_doctor_name"
                android:layout_toEndOf="@+id/fragment_advice_cardview_IV_doctor_photo"
                android:text="@string/omg" />

        </RelativeLayout>
    </android.support.v7.widget.CardView>
</LinearLayout>

这是我的fragment_layout.xml：

<ViewSwitcher xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/fragment_advice_VS_view_switcher"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".android.fragments.AdviceFragment">

    <android.support.v7.widget.RecyclerView
        android:id="@+id/fragment_advice_RV_list"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

    <TextView
        android:id="@+id/fragment_advice_TV_empty_error_message"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

</ViewSwitcher>

我的适配器：

public class RVAdapter extends RecyclerView.Adapter<RVAdapter.DoctorViewHolder> {
    private final ArrayList<Doctor> doctors;

    public RVAdapter(ArrayList<Doctor> doctors) {
        this.doctors = doctors;
    }


    @Override
    public DoctorViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.fragment_advice_cardview_layout, parent, false);

        final TextView doctorAdviceTV = (TextView) view.findViewById(R.id.fragment_advice_cardview_TV_doctor_advice);
        System.out.println("doctorAdviceTV.getId() : " + doctorAdviceTV.getId());
        System.out.println("doctorAdviceTV.getHeight() : " + doctorAdviceTV.getHeight());


        ViewTreeObserver doctorAdviceTVviewTreeObserver = doctorAdviceTV.getViewTreeObserver();
        doctorAdviceTVviewTreeObserver.addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
            @Override
            public void onGlobalLayout() {
                doctorAdviceTV.getViewTreeObserver().removeOnGlobalLayoutListener(this);

                int maxLines = doctorAdviceTV.getHeight() / doctorAdviceTV.getLineHeight();
                BaseActivity.logD("RVAdapter", "maxLines : " + maxLines + " = " + doctorAdviceTV.getHeight() + " / " + doctorAdviceTV.getLineHeight());
                doctorAdviceTV.setMaxLines(maxLines);
                doctorAdviceTV.setEllipsize(TextUtils.TruncateAt.END);
            }
        });

        DoctorViewHolder dvh = new DoctorViewHolder(view);
        return dvh;
    }

    @Override
    public void onBindViewHolder(DoctorViewHolder holder, int position) {
        Doctor doctor = doctors.get(position);
        holder.doctorNameTV.setText(doctor.getSettingValue(Doctor.SETTINGS.NAME));
        holder.doctorAdviceTV.setText(doctor.getSettingValue(Doctor.SETTINGS.ADVICE));

        Bitmap profilePicture = doctor.getProfilePicture();
        if (profilePicture == null) {
            holder.doctorImageIV.setImageResource(R.drawable.batman_logo);
        } else {
            holder.doctorImageIV.setImageBitmap(profilePicture);
        }
    }

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

    public static class DoctorViewHolder extends RecyclerView.ViewHolder {

        CardView cv;
        TextView doctorNameTV;
        TextView doctorAdviceTV;
        ImageView doctorImageIV;

        public DoctorViewHolder(View itemView) {
            super(itemView);
            cv = (CardView) itemView.findViewById(R.id.fragment_advice_cardview_CV_cardview);
            doctorNameTV = (TextView) itemView.findViewById(R.id.fragment_advice_cardview_TV_doctor_name);
            doctorAdviceTV = (TextView) itemView.findViewById(R.id.fragment_advice_cardview_TV_doctor_advice);
            doctorImageIV = (ImageView) itemView.findViewById(R.id.fragment_advice_cardview_IV_doctor_photo);
        }
    }
}

当然结果

在改变之前：

正如您所看到的，第一个CardView TextView正确更新到正确的行数，但第二个仍保持1，即使有更多的空间。

请帮忙。

谢谢

Answer 1

尝试

textView.setMaxLines(("This is a \n \n test".split("\n").length+1));