效果图如下:

添加依赖

implementation 'com.weigan:loopView:0.1.2'

新建一个WheelViewDialog类, 代码如下

public class WheelViewDialog extends Dialog{    private LoopView loopView;    private Button btn_ok;    private Button btn_cancle;    private OnSelectedListener listener;    private ArrayList
    
      stringArrayList = new ArrayList<>();    private int position = 0;    public WheelViewDialog(Context context, ArrayList
     
       arrayList) {        super(context,R.style.alert_dialog);        stringArrayList = arrayList;    }    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.dialog_view);        setCanceledOnTouchOutside(false);//设置显示dialog后,触屏屏幕不会使dialog消失        loopView =  findViewById(R.id.loopView);        btn_ok =  findViewById(R.id.btn_ok);        btn_cancle =  findViewById(R.id.btn_cancle);        // 设置原始数据        loopView.setItems(stringArrayList);        loopView.setNotLoop();        // 滚动监听//        loopView.setListener(new AdapterView.OnItemSelectedListener() {//            @Override//            public void onItemSelected(int index) {//                if (!TextUtils.isEmpty( stringArrayList.get( index) ) ){//                    Toast.makeText(getContext() ,"选择了" + stringArrayList.get( index) , Toast.LENGTH_SHORT).show();//                    position = index;//存储选择的位序//                }//            }//        });        loopView.setListener(new OnItemSelectedListener() {            @Override            public void onItemSelected(int i) {                if (!TextUtils.isEmpty( stringArrayList.get( i) ) ){                    Toast.makeText(getContext() ,"选择了" + stringArrayList.get( i) , Toast.LENGTH_SHORT).show();                    position = i;//存储选择的位序                }            }        });        btn_ok.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View view) {                if (listener!=null){                    if (!TextUtils.isEmpty( stringArrayList.get( position) ) ){                        listener.getData( stringArrayList.get( position) );                    }                }                dismiss();            }        });        btn_cancle.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View view) {                dismiss();            }        });    }    public interface OnSelectedListener{        void getData(String data);    }    public void setOnSelectedListener(OnSelectedListener listener){        this.listener = listener;    }}
     
    

新建 dialog_view.xml文件, 代码如下:

背景图片是这个:

然后就可以在需要调用的地方调用了

比如点击一个按钮, 弹出dialog, 示例代码:

public class DialogActivity extends AppCompatActivity {    private Button showDialogBtn;    private ArrayList
    
      stringArrayList = new ArrayList<>();    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_dialog);        showDialogBtn = findViewById(R.id.act_show_dialog_btn);        for (int i = 0; i < 15; i++) {            stringArrayList.add("item " + i);        }        showDialogBtn.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View view) {                showDialog();            }        });    }    private void showDialog() {        WheelViewDialog dialog = new WheelViewDialog( DialogActivity.this, stringArrayList );        dialog.setOnSelectedListener(new WheelViewDialog.OnSelectedListener() {            @Override            public void getData(String data) {                Toast.makeText(DialogActivity.this, ""+data, Toast.LENGTH_SHORT).show();            }        });        dialog.show();    }}
    

ok完成