Android自定义wheelview随机选号效果

package com.yskj.jh.wheeldemo;import android.app.Dialog;import android.content.Context;import android.os.Bundle;import android.view.View;import android.view.ViewGroup;import android.widget.ImageView;import android.widget.TextView;import android.widget.Toast;import com.yskj.jh.wheeldemo.wheel.adapters.AbstractWheelTextAdapter;import com.yskj.jh.wheeldemo.wheel.views.OnWheelChangedListener;import com.yskj.jh.wheeldemo.wheel.views.OnWheelScrollListener;import com.yskj.jh.wheeldemo.wheel.views.WheelView;import java.util.ArrayList;import java.util.List;/** * Created by Administrator on 2016/4/7. */public class SnatchDialog extends Dialog implements View.OnClickListener, OnWheelChangedListener { private Context context; private TextView tvNumberL, tvNumberC, tvNumberR; //数字控件 private WheelView wvLeft; private WheelView wvCenter; private WheelView wvRight; //数字集合 private List<String> list = new ArrayList<String>(); //选中的数字信息 private String strLeft; private String strCenter; private String strRight = "1"; private TextView btnSure;//确定按钮 private ImageView btnCancle;//取消按钮 private TextView btnRandom;//随机 //回调函数 private OnSnatchCListener onSnatchCListener; private NumberAdapter adapter; //显示文字的字体大小 private int maxsize = 26; private int minsize = 18; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.dialog_snatch); initView(); } public SnatchDialog(Context context){ super(context, R.style.ShareDialog); this.context = context; } private void initView() { tvNumberL = (TextView) findViewById(R.id.tv_number1); tvNumberC = (TextView) findViewById(R.id.tv_number2); tvNumberR = (TextView) findViewById(R.id.tv_number3); for (int i = 0; i < 10; i++) {  list.add(i + ""); } wvLeft = (WheelView) findViewById(R.id.wv_snatch_left); wvCenter = (WheelView) findViewById(R.id.wv_snatch_center); wvRight = (WheelView) findViewById(R.id.wv_snatch_right); btnSure = (TextView) findViewById(R.id.tv_sure); btnCancle = (ImageView) findViewById(R.id.img_cancel); btnRandom = (TextView) findViewById(R.id.tv_random); btnSure.setOnClickListener(this); btnCancle.setOnClickListener(this); btnRandom.setOnClickListener(this); wvLeft.addChangingListener(this); wvCenter.addChangingListener(this); wvRight.addChangingListener(this); wvLeft.setCyclic(true); wvRight.setCyclic(true); wvCenter.setCyclic(true); wvLeft.setVisibleItems(3); wvCenter.setVisibleItems(3); wvRight.setVisibleItems(3); wvLeft.addScrollingListener(new OnWheelScrollListener() {  @Override  public void onScrollingStarted(WheelView wheel) {  }  @Override  public void onScrollingFinished(WheelView wheel) {  String currentText = (String) adapter.getItemText(wheel.getCurrentItem());  strLeft = (String) adapter.getItemObject(wheel.getCurrentItem());  setTextViewSize(strLeft, adapter);  tvNumberL.setText(strLeft);  } }); wvCenter.addScrollingListener(new OnWheelScrollListener() {  @Override  public void onScrollingStarted(WheelView wheel) {  }  @Override  public void onScrollingFinished(WheelView wheel) {  String currentText = (String) adapter.getItemText(wheel.getCurrentItem());  strCenter = (String) adapter.getItemObject(wheel.getCurrentItem());  setTextViewSize(strCenter, adapter);  tvNumberC.setText(strCenter);  } }); wvRight.addScrollingListener(new OnWheelScrollListener() {  @Override  public void onScrollingStarted(WheelView wheel) {  }  @Override  public void onScrollingFinished(WheelView wheel) {  String currentText = (String) adapter.getItemText(wheel.getCurrentItem());  strRight = (String) adapter.getItemObject(wheel.getCurrentItem());  setTextViewSize(strRight, adapter);  tvNumberR.setText(strRight);  } }); /**  * 设置适配器  */ adapter = new NumberAdapter(context, list, 0, maxsize, minsize); wvLeft.setViewAdapter(adapter); wvLeft.setCurrentItem(0); wvCenter.setViewAdapter(adapter); wvCenter.setCurrentItem(0); wvRight.setViewAdapter(adapter); wvRight.setCurrentItem(1); } @Override public void onChanged(WheelView wheel, int oldValue, int newValue) { } public interface OnSnatchCListener { void onClick(String strLeft, String strCenter, String strRight); } @Override public void onClick(View v) { if (v == btnSure) {  if (onSnatchCListener != null) {  onSnatchCListener.onClick(strLeft, strCenter, strRight);  }  if (strLeft == null) {  strLeft = "0";  }  if (strCenter == null) {  strCenter = "0";  }  if (strRight == null) {  strRight = "0";  }  if ((strLeft + strCenter + strRight).equals("000")) {  Toast.makeText(context, "不能为0", Toast.LENGTH_SHORT).show();  } else {  if (Integer.parseInt(strLeft + strCenter + strRight) > 0 && Integer.parseInt(strLeft + strCenter + strRight) <= 999) {  }  } } if (v == btnCancle) {  dismiss(); } if (v == btnRandom) {  int a = (int) (Math.random() * 5000 + 1);  int b = (int) (Math.random() * 5000 + 1);  int c = (int) (Math.random() * 5000 + 1);  wvLeft.scroll(a, 500);  wvRight.scroll(b, 500);  wvCenter.scroll(c, 500); } } //适配器 public class NumberAdapter extends AbstractWheelTextAdapter { List<String> list; protected NumberAdapter(Context context, List<String> list, int currentItem, int maxsize, int minsize) {  super(context, R.layout.item_birth_year, NO_RESOURCE, currentItem, maxsize, minsize);  this.list = list;  setItemTextResource(R.id.tempValue); } @Override public View getItem(int index, View cachedView, ViewGroup parent) {  View view = super.getItem(index, cachedView, parent);  return view; } @Override protected CharSequence getItemText(int index) {  if (list != null && list.size() > 0) {  return list.get(index);  }  return ""; } @Override protected Object getItemObject(int index) {  if (list != null && list.size() > 0) {  return list.get(index);  }  return null; } @Override public int getItemsCount() {  if (list != null) {  return list.size();  }  return 0; } } public void setTextViewSize(String curriteItemText, NumberAdapter adapter) { ArrayList<View> arrayList = adapter.getTestViews(); int size = arrayList.size(); String currentText; for (int i = 0; i < size; i++) {  TextView textview = (TextView) arrayList.get(i);  currentText = textview.getText().toString();  if (curriteItemText.equals(currentText)) {  textview.setTextSize(maxsize);  } else {  textview.setTextSize(minsize);  } } } public void setOnSnatchCListener(OnSnatchCListener onSnatchCListener) { this.onSnatchCListener = onSnatchCListener; }}

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="385dp" android:layout_marginBottom="5dp" android:layout_marginLeft="5dp" android:layout_marginRight="5dp" android:background="#00000000" android:gravity="bottom" android:layout_gravity="bottom" android:orientation="vertical"> <LinearLayout android:id="@+id/ly_myinfo_changeaddress_child" android:layout_width="match_parent" android:layout_height="wrap_content" android:background="@drawable/address_edit_delete_ensure_bg" android:orientation="vertical" > <FrameLayout  android:layout_width="match_parent"  android:layout_height="wrap_content">  <TextView  android:layout_width="match_parent"  android:layout_height="45dp"  android:gravity="center"  android:textSize="16sp"  android:textColor="#7a7a7c"  android:text="选择幸运号" />  <ImageView  android:id="@+id/img_cancel"  android:layout_width="16dp"  android:layout_height="16dp"  android:layout_gravity="right|center"  android:layout_marginRight="17dp"  android:clickable="true"  android:src="@mipmap/cha" /> </FrameLayout> <View  android:layout_width="match_parent"  android:layout_height="1dp"  android:background="#f5f5f5" /> <LinearLayout  android:layout_width="match_parent"  android:layout_height="110dp"  android:gravity="center_vertical"  android:orientation="horizontal">  <com.yskj.jh.wheeldemo.wheel.views.WheelView  android:id="@+id/wv_snatch_left"  android:layout_width="0dp"  android:layout_height="match_parent"  android:layout_gravity="center_vertical"  android:layout_weight="1" />  <com.yskj.jh.wheeldemo.wheel.views.WheelView  android:id="@+id/wv_snatch_center"  android:layout_width="0dp"  android:layout_height="match_parent"  android:layout_gravity="center_vertical"  android:layout_weight="1" />  <com.yskj.jh.wheeldemo.wheel.views.WheelView  android:id="@+id/wv_snatch_right"  android:layout_width="0dp"  android:layout_height="match_parent"  android:layout_gravity="center_vertical"  android:layout_weight="1" /> </LinearLayout> <LinearLayout  android:layout_width="match_parent"  android:layout_height="wrap_content"  android:gravity="center"  android:orientation="vertical">  <LinearLayout  android:layout_width="wrap_content"  android:layout_height="wrap_content"  android:layout_marginTop="8dp"  android:orientation="horizontal">  <TextView   android:id="@+id/tv_number"   android:layout_width="wrap_content"   android:layout_height="wrap_content"   android:text="当前选中的号码是: "   android:textColor="#faa701"   android:textSize="11sp"/>  <TextView   android:id="@+id/tv_number1"   android:layout_width="wrap_content"   android:layout_height="wrap_content"   android:textSize="11sp"   android:textColor="#faa701"   android:text="0"/>  <TextView   android:id="@+id/tv_number2"   android:layout_width="wrap_content"   android:layout_height="wrap_content"   android:textSize="11sp"   android:textColor="#faa701"   android:text="0"/>  <TextView   android:id="@+id/tv_number3"   android:layout_width="wrap_content"   android:layout_height="wrap_content"   android:textSize="11sp"   android:textColor="#faa701"   android:text="1"/>  </LinearLayout>  <LinearLayout  android:layout_width="match_parent"  android:layout_height="wrap_content"  android:orientation="horizontal">  <TextView   android:id="@+id/tv_random"   android:layout_width="0dp"   android:layout_height="27dp"   android:layout_weight="1"   android:layout_margin="10dp"   android:background="@drawable/round_corner_blue"   android:gravity="center"   android:text="我要随机选号"   android:clickable="true"   android:textSize="13sp"   android:textColor="#45a3f3" />  <TextView   android:id="@+id/tv_sure"   android:layout_width="0dp"   android:layout_height="27dp"   android:layout_weight="1"   android:layout_margin="10dp"   android:background="@drawable/round_corner_blue_btn"   android:gravity="center"   android:clickable="true"   android:text="确定"   android:textSize="15sp"   android:textColor="#ffffff" />  </LinearLayout> </LinearLayout> </LinearLayout></LinearLayout>