Question

嘿，我在显示CardView中的一行时遇到问题。我想用行分隔图像和标题。我在CardView中使用view作为行。在预览中可以，但是在运行应用程序时不显示。这是我的代码：

我在另一个项目中做到了这一点，并且有效，但是在这个项目中不起作用

xml代码：

   <?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView `enter code here`xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_margin="4dp"
    android:foreground="?attr/selectableItemBackground"
    android:clickable="true"
    app:cardCornerRadius="8dp"
    xmlns:tools="http://schemas.android.com/tools">

    <RelativeLayout
        android:padding="8dp"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">


        <ImageView
            android:scaleType="centerCrop"
            android:id="@+id/img_amazingRow_icon"
            android:layout_alignParentRight="true"
            tools:src="@mipmap/ic_launcher"
            android:layout_width="130dp"
            android:layout_height="170dp" />
        <TextView
            android:textColor="#000"
            android:id="@+id/txt_amazingRow_title"
            android:ellipsize="end"
            android:maxLines="1"
            android:layout_centerHorizontal="true"
            android:layout_alignParentRight="true"
            android:layout_below="@+id/img_amazingRow_icon"
            tools:text="سرویس چای خوری"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />

        <View
            android:id="@+id/line_amazingRow"
            android:layout_margin="8dp"
            android:layout_below="@+id/txt_amazingRow_title"
            android:background="#000"
            android:layout_width="match_parent"
            android:layout_height="1dp"/>
        <TextView
            android:textColor="@color/gray500"
            android:layout_centerHorizontal="true"
            android:layout_alignParentRight="true"
            android:layout_below="@id/line_amazingRow"
            tools:text="24500"
            android:id="@+id/txt_amazingRow_discount"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
        <TextView
            android:layout_marginTop="8dp"
            android:textColor="#000"
            android:layout_centerHorizontal="true"
            android:layout_alignParentRight="true"
            android:layout_below="@id/txt_amazingRow_discount"
            tools:text="24500"
            android:id="@+id/txt_amazingRow_price"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />

    </RelativeLayout>

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

活动代码：

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);


        setupViews();
        getMainData();

        final DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);

        ImageView imgHamberMenu = (ImageView) findViewById(R.id.img_toolbar_hamberMenu);
        imgHamberMenu.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                drawer.openDrawer(Gravity.RIGHT);
            }
        });
        NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
        navigationView.setNavigationItemSelectedListener(this);
    }


    public void getMainData() {
        ApiService service = ApiClient.getClient().create(ApiService.class);
        Call<MainData> call = service.getMainData();
        call.enqueue(new Callback<MainData>() {
            @Override
            public void onResponse(Call<MainData> call, Response<MainData> response) {

                MainData mainData = response.body();
                cats=mainData.getCats();
                iamgeUrl = mainData.getSliders();
                catRecycler.setAdapter(new CatAdapter(MainActivity.this,cats));

                amazingList=mainData.getAmazings();
                for (int i = 0; i < iamgeUrl.size(); i++) {
                    DefaultSliderView defaultSliderView = new DefaultSliderView(MainActivity.this);
                    defaultSliderView
                            .image(iamgeUrl.get(i).getUrl())
                            .setScaleType(BaseSliderView.ScaleType.CenterCrop)
                            .setOnSliderClickListener(MainActivity.this);

                    defaultSliderView.bundle(new Bundle());
                    slider.addSlider(defaultSliderView);

                    txtHour.setText(hour+"");
                    txtMin.setText(min+"");
                    txtSecond.setText(second+"");
                }

                amazingRecycler.setAdapter(new AmazingAdapter(MainActivity.this,amazingList));
            }

            @Override
            public void onFailure(Call<MainData> call, Throwable t) {

                Log.i("LOG", t.toString());
            }
        });
    }


    public void setupViews() {
        txtHour=(TextView)findViewById(R.id.txt_amazing_hour);
        txtMin=(TextView)findViewById(R.id.txt_amazing_min);
        txtSecond=(TextView)findViewById(R.id.txt_amazing_second);
        imgBannerB=(ImageView)findViewById(R.id.img_main_bannerBottom) ;
        imgBannerR=(ImageView)findViewById(R.id.img_main_bannerRight) ;
        imgBannerL=(ImageView)findViewById(R.id.img_main_bannerLeft);

        Picasso.with(getApplicationContext()).load("https://dkstatics-public.digikala.com/digikala-adservice-banners/4387.jpg").into(imgBannerB);
        Picasso.with(getApplicationContext()).load("https://dkstatics-public.digikala.com/digikala-adservice-banners/2774.jpg").into(imgBannerL);
        Picasso.with(getApplicationContext()).load("https://dkstatics-public.digikala.com/digikala-adservice-banners/1814.jpg").into(imgBannerR);

        amazingRecycler=(RecyclerView)findViewById(R.id.rv_main_amazing);
        amazingRecycler.setLayoutManager(new LinearLayoutManager(MainActivity.this,LinearLayoutManager.HORIZONTAL,true));
        iamgeUrl = new ArrayList<>();
        catRecycler=(RecyclerView)findViewById(R.id.rv_main_cats);
        catRecycler.setLayoutManager(new LinearLayoutManager(MainActivity.this,LinearLayoutManager.HORIZONTAL,true));
        slider = (SliderLayout) findViewById(R.id.slider_main);
        slider.setPresetTransformer(SliderLayout.Transformer.Default);
        slider.setPresetIndicator(SliderLayout.PresetIndicators.Center_Bottom);
    }

适配器代码：

public class AmazingAdapter extends RecyclerView.Adapter<AmazingAdapter.AmazingViewHolder> {

    public Context context;
    public List<Amazing> amazingList;

    public AmazingAdapter(Context context, List<Amazing> amazingList){
        this.amazingList=amazingList;
        this.context=context;
    }

    @NonNull
    @Override
    public AmazingViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
       View view= LayoutInflater.from(context).inflate(R.layout.amazing_row,viewGroup,false);
        return  new AmazingViewHolder(view);
    }

    @Override
    public void onBindViewHolder(@NonNull AmazingViewHolder amazingViewHolder, int position) {

        Amazing amazing=amazingList.get(position);
        amazingViewHolder.txtTitle.setText(amazing.getTitle());
        amazingViewHolder.txtPrice.setText(amazing.getPrice()+" تومان");

        SpannableString spannableString=new SpannableString(amazing.getPrice()+"تومان ");
        spannableString.setSpan(new StrikethroughSpan(),0,amazing.getPrice().length(),Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        amazingViewHolder.txtDiscount.setText(spannableString);

        Picasso.with(context).load(amazing.getImg()).into(amazingViewHolder.imgIcon);
    }

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

    public class AmazingViewHolder extends RecyclerView.ViewHolder{

        ImageView imgIcon;
        TextView txtTitle;
        TextView txtPrice,txtDiscount;
        public AmazingViewHolder(@NonNull View itemView) {
            super(itemView);
            txtTitle=(TextView)itemView.findViewById(R.id.txt_amazingRow_title);
            txtPrice=(TextView)itemView.findViewById(R.id.txt_amazingRow_price);
            txtDiscount=(TextView)itemView.findViewById(R.id.txt_amazingRow_discount);
            imgIcon=(ImageView)itemView.findViewById(R.id.img_amazingRow_icon);
        }
    }
}

我希望在txt_amazingRow_title和txt_amazingRow_discount之间显示一行但这没用

Answer 1

@john，

似乎您的布局层次结构正确。只需要替换一些属性。

我刚刚将tools:src替换为android:src，将tools:text替换为android:text。现在一切正常。 Check this Screenshot

此外，您应该使用 @+id 而不是 @id 。两者都一样。 @id不会在代码中引起任何问题，但是最好使用@+id来避免任何意外的问题。

就是这样。

Android在CardView中未将视图显示为一行

1 个答案: