Question

我想在我的应用中添加卡片样式

我在我的应用程序mysql数据库中使用所以我需要制作这样的卡并将数据从数据库放入其中我现在使用ListView与此代码

public void listAllItme() {
    ListAdapter lA = new listAdapter(listitems);
    listView.setAdapter(lA);


    listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

                Intent open = new Intent(R_arabic.this, rewaya_show.class);
                open.putExtra("name", listitems.get(position).name);
                open.putExtra("url", listitems.get(position).url);
                open.putExtra("img", listitems.get(position).img);
                open.putExtra("num", listitems.get(position).num);

                startActivity(open);


            }
        }
    });

}



class listAdapter extends BaseAdapter {
    ArrayList<listitem_gib> lista = new ArrayList<listitem_gib>();

    public listAdapter(ArrayList<listitem_gib> lista) {
        this.lista = lista;
    }

    @Override
    public int getCount() {
        return lista.size();
    }

    @Override
    public Object getItem(int position) {
        return lista.get(position).name;
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(final int position, View convertView, ViewGroup parent) {
        LayoutInflater layoutInflater = getLayoutInflater();
        View view = layoutInflater.inflate(R.layout.row_item_gib, null);

        TextView name = (TextView) view.findViewById(R.id.textView_gib);
        ImageView img = (ImageView) view.findViewById(R.id.imageView_gib);
        TextView num = (TextView) view.findViewById(R.id.textView_gib2);
        TextView size = (TextView) view.findViewById(R.id.textView_gib3);


        name.setText(lista.get(position).name);
        num.setText(lista.get(position).num);
        size.setText(lista.get(position).size);


        Picasso.with(R_arabic.this).load("http://grassyhat.com/android/image/" + lista.get(position).img).into(img);


        return view;
    }
}

首先，我想知道我如何制作这种卡式

第二，如何将此代码用于卡片菜单而非listview

对不起我是android的新手，抱歉我的英文不好

Answer 1

卡片菜单是什么意思？因为图像中的示例是带有cardview项目的recyclerview，您可以通过执行此类操作来实现此目的

这将是您的活动

public class MainActivity extends AppCompatActivity {

private RecyclerView recyclerView;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    recyclerView = (RecyclerView)findViewById(R.id.recyclerView);

    //Just your list of objects, in your case the list that comes from the db
    List<Items> itemsList = new ArrayList<>();
    CardAdapter adapter = new CardAdapter(this, itemsList);

    //RecyclerView needs a layout manager in order to display data so here we create one
    StaggeredGridLayoutManager layoutManager = new StaggeredGridLayoutManager(3, StaggeredGridLayoutManager.VERTICAL);

    //Here we set the layout manager and the adapter to the listview
    recyclerView.setLayoutManager(layoutManager);
    recyclerView.setAdapter(adapter);
}

在布局文件中，您只需要像这样放置recyclerview

<RelativeLayout
android:id="@+id/activity_main"
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="jsondh.myapplication.MainActivity">

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

然后你的适配器将是这样的

public class CardAdapter extends RecyclerView.Adapter<CardAdapter.CardViewHolder> {

private List<Items> itemsList;
private Activity activity;

public CardAdapter(Activity activity, List<Items> items){
    this.activity = activity;
    this.itemsList = items;
}

@Override
public CardViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View itemView = activity.getLayoutInflater().inflate(R.layout.cardview_layout, parent, false);
    return new CardViewHolder(itemView);
}

@Override
public void onBindViewHolder(CardViewHolder holder, int position) {
    //Here you bind your views with the data from each object from the list
}

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

public class CardViewHolder extends RecyclerView.ViewHolder {

    public ImageView bookImage;
    public TextView bookLabel01, bookLabel02;

    public CardViewHolder(View itemView) {
        super(itemView);
        bookImage = (ImageView)itemView.findViewById(R.id.image);
        bookLabel01 = (TextView)itemView.findViewById(R.id.label01);
        bookLabel02 = (TextView)itemView.findViewById(R.id.label02);
    }
}

最后一个将是列表中每个项目的布局，如此

<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="10dp">

<android.support.v7.widget.CardView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    app:cardElevation="15dp"
    app:cardBackgroundColor="#3369Ed">

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical">

        <ImageView
            android:id="@+id/image"
            android:layout_width="150dp"
            android:layout_height="130dp"/>

        <TextView
            android:id="@+id/label01"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Label"
            android:layout_gravity="right"
            android:padding="5dp"
            android:textColor="#ffffff"/>

        <TextView
            android:id="@+id/label02"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="LongerLabel"
            android:layout_gravity="right"
            android:padding="5dp"
            android:textColor="#ffffff"/>

    </LinearLayout>

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

您还必须将其添加到您的gradle文件中：

编译'com.android.support:recyclerview-v7:25.0.0'

编译'com.android.support:cardview-v7:25.0.0'

希望它有所帮助！

Answer 2

这很简单。您必须使用带有GridLayoutManager的RecyclerView并向其添加cardView。

然后，使用Adapter和ViewHolder提供数据。

我建议你查看一下：
https://developer.android.com/training/material/lists-cards.html

如何在android

2 个答案: