Android自定义对话框滑动选择数据（使用DiscreteScrollView框架）

先上图看看效果

效果大概就是图上面的了，自定义一个对话框，然后可以滑动选择数据。

在这里我使用了DiscreteScrollView框架，这个框架给出的demo是在Activity中这样显示，但既然在Activity都可以实现此效果，那在dialog中自然也可以实现，给出框架地址，大家可以去看一下。

框架地址

下面来介绍如何实现此效果。

1.添加依赖：

implementation 'com.yarolegovich:discrete-scrollview:1.4.9'
           

2.自定义dialog布局：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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:background="@drawable/backgrounddialogshape">
    <TextView
        android:layout_alignParentTop="true"
        android:id="@+id/tv_show_cjfq"
        android:text=""
        android:layout_centerHorizontal="true"
        android:layout_marginTop="15dp"
        android:textSize="20dp"
        android:textColor="#328dff"
        android:textStyle="bold"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content">
    </TextView>
    <com.yarolegovich.discretescrollview.DiscreteScrollView
        android:layout_below="@+id/tv_show_cjfq"
        android:layout_marginTop="30dp"
        android:layout_marginBottom="30dp"
        android:layout_marginLeft="50dp"
        android:layout_marginRight="50dp"
        android:id="@+id/picker"
        android:layout_width="match_parent"
        android:layout_height="100dp"
        app:dsv_orientation="vertical" />
    <LinearLayout
        android:id="@+id/ll_address"
        android:layout_below="@+id/picker"
        android:layout_width="match_parent"
        android:layout_height="45dp"
        android:orientation="horizontal">
        <TextView
            android:id="@+id/submit"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:gravity="center"
            android:layout_weight="1"
            android:text="确定"
            android:background="@color/top"
            android:textSize="20dp"
            android:textStyle="bold"
            android:textColor="@color/white"/>
        <View
            android:layout_width="1dp"
            android:layout_height="match_parent"
            android:background="#eee"/>
        <TextView
            android:id="@+id/cancel"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:gravity="center"
            android:text="取消"
            android:textSize="20dp"
            android:textStyle="bold"
            android:textColor="#666"/>
    </LinearLayout>
</RelativeLayout>
           

3.dialog相关操作

//首先自定义一些变量

private DiscreteScrollView picker; 
    private InfiniteScrollAdapter infiniteAdapter;
    private List<ItemBean> data;
    private String name;
           

WindowManager.LayoutParams lp = getWindow().getAttributes();
                lp.alpha = 0.3f; 
                getWindow().setAttributes(lp);
                getWindow().addFlags(WindowManager.LayoutParams.FLAG_DIM_BEHIND);
                LayoutInflater inflater = LayoutInflater.from(this);
                View inflate = inflater.inflate(R.layout.dialog_address_partition_live, null);
                final AlertDialog.Builder dialog = new AlertDialog.Builder(this, R.style.MyDialog).setCancelable(false);
                dialog.setView(inflate);
                final AlertDialog alertDialog = dialog.create();
                alertDialog.show();
                data = getData();
                picker = (DiscreteScrollView)inflate.findViewById(R.id.picker);
                picker.setOrientation(DSVOrientation.VERTICAL);  //设置滑动的水平方向
                picker.addOnItemChangedListener(this);  //设置监听，获取获得到的哪一条数据
                infiniteAdapter = InfiniteScrollAdapter.wrap(new AddressAdapter(data));  //适配器
                picker.setAdapter(infiniteAdapter);  //设置适配器
                picker.setItemTransitionTimeMillis(150);  //设置动画时间
                picker.setItemTransformer(new ScaleTransformer.Builder()
                        .setMinScale(0.6f)  //设置上下数据的与中间数据的字体大小
                        .build());
                inflate.findViewById(R.id.submit).setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        alertDialog.dismiss();
                        WindowManager.LayoutParams lp = getWindow().getAttributes();
                        lp.alpha = 1.0f; //值越大越透明，即不暗
                        getWindow().setAttributes(lp);
                        getWindow().addFlags(WindowManager.LayoutParams.FLAG_DIM_BEHIND);
                       //确定按钮，这里可以进行确定后的一些操作，比如跳转界面，将数据传递到下一个界面
                    }
                });
                //取消按钮
                inflate.findViewById(R.id.cancel).setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        alertDialog.dismiss();
                        WindowManager.LayoutParams lp = getWindow().getAttributes();
                        lp.alpha = 1.0f; //值越大越透明，即不暗
                        getWindow().setAttributes(lp);
                        getWindow().addFlags(WindowManager.LayoutParams.FLAG_DIM_BEHIND);
                    }
                });
                break;
        }
    }
     @Override
    public void onCurrentItemChanged(@Nullable RecyclerView.ViewHolder viewHolder, int position) {
        int positionInDataSet = infiniteAdapter.getRealPosition(position);
        ItemBean bean = data.get(positionInDataSet);
        name = bean.getName();
        Log.e(TAG,"当前选中的数据是：" + name);
    }
    private List<ItemBean> getData() {
        return Arrays.asList(
                new ItemBean( "Everyday Candle"),
                new ItemBean("Small Porcelain Bowl"),
                new ItemBean( "Favourite Board"),
                new ItemBean( "Earthenware Bowl"),
                new ItemBean( "Porcelain Dessert Plate"),
                new ItemBean( "Detailed Rolling Pin"));
    }
           

适配器代码：

public class AddressAdapter extends RecyclerView.Adapter<AddressAdapter.ViewHolder> {

    private List<ItemBean> data;

    public AddressAdapter(List<ItemBean> data) {
        this.data = data;
    }

    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        LayoutInflater inflater = LayoutInflater.from(parent.getContext());
        View v = inflater.inflate(R.layout.item_address, parent, false);
        return new ViewHolder(v);
    }

    @Override
    public void onBindViewHolder(ViewHolder holder, int position) {
        ItemBean itemBean = data.get(position);
        String name = itemBean.getName();
        holder.tv_show_address.setText(String.valueOf(name));
    }

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

    class ViewHolder extends RecyclerView.ViewHolder {

        private TextView tv_show_address;

        public ViewHolder(View itemView) {
            super(itemView);
            tv_show_address = (TextView) itemView.findViewById(R.id.tv_show_address);
        }
    }
}
           

适配器布局文件：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_gravity="center"
    android:layout_height="30dp">
    <TextView
        android:id="@+id/tv_show_address"
        android:textColor="@color/top"
        android:textSize="20dp"
        android:textStyle="bold"
        android:layout_centerHorizontal="true"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content">
    </TextView>
</RelativeLayout>
           

ItemBean：

public class ItemBean {

    private final String name;

    public ItemBean(String name) {
        this.name = name;

    }

    public String getName() {
        return name;
    }
}
           

有些不懂的地方可以去看看框架里面的解释，实在不懂的可以在下面留言或者私聊我。

附上xml文件中其它代码：

backgrounddialogshape

<?xml version="1.0" encoding="UTF-8"?>
<shape
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">
    <!-- 填充的颜色 -->
    <solid android:color="#ffffff" />
    <!-- 设置按钮的四个角为弧形 -->
    <!-- android:radius 弧形的半径 -->
    <corners android:radius="10dip" />
</shape>
           

MyDialog

<style name="MyDialog" parent="@android:style/Theme.DeviceDefault.Light.Dialog">
        <!--背景颜色及和透明程度-->
        <item name="android:windowBackground">@android:color/transparent</item>
        <!--是否去除标题 -->
        <item name="android:windowNoTitle">true</item>
        <!--是否去除边框-->
        <item name="android:windowFrame">@null</item>
        <!--是否浮现在activity之上-->
        <item name="android:windowIsFloating">true</item>
        <!--是否模糊-->
        <item name="android:backgroundDimEnabled">false</item>
    </style>