android自定义滚轴选择器

本文实例为大家分享了android自定义滚轴选择器的具体代码，供大家参考，具体内容如下

效果图：

点击选择餐具弹出底部弹窗

 private dialog dialog;
 private view inflate;
 pickvalueview pickstring;
 
 
 
case r.id.rl_cj_num://餐具数量选择
    //选择对话框
    dialog = new dialog(this, r.style.actionsheetdialogstyle);
    view contentview = layoutinflater.from(this).inflate(r.layout.dialog_cj_num, null);
    //获取组件
    tv_cancel = contentview.findviewbyid(r.id.tv_cancel);
    pickstring = contentview.findviewbyid(r.id.pickstring);
    //获取dialog的监听
    tv_cancel.setonclicklistener(this);
    pickstring.setonselectedchangelistener(this);
    string[] valuestr = new string[]{"无需餐具", "1人", "2人", "3人", "4人", "5人",
      "6人", "7人", "8人"};
    pickstring.setvaluedata(valuestr, valuestr[1]);
    dialog.setcontentview(contentview);
    viewgroup.layoutparams layoutparams = contentview.getlayoutparams();
    layoutparams.width = getresources().getdisplaymetrics().widthpixels;
    contentview.setlayoutparams(layoutparams);
    dialog.getwindow().setgravity(gravity.bottom);//弹窗位置
    dialog.getwindow().setwindowanimations(r.style.actionsheetdialogstyle);//弹窗样式
    dialog.show();//显示弹窗
    break;

styles.xml中的样式：

 <!-- dialog弹窗效果-->
 <style name="actionsheetdialogstyle" parent="@android:style/theme.dialog">
  <!-- 背景透明 -->
  <item name="android:windowbackground">@android:color/transparent</item>
  <item name="android:windowcontentoverlay">@null</item>
  <!-- 浮于activity之上 -->
  <item name="android:windowisfloating">true</item>
  <!-- 边框 -->
  <item name="android:windowframe">@null</item>
  <!-- dialog以外的区域模糊效果 -->
  <item name="android:backgrounddimenabled">true</item>
  <!-- 无标题 -->
  <item name="android:windownotitle">true</item>
  <!-- 半透明 -->
  <item name="android:windowistranslucent">true</item>
  <!-- dialog进入及退出动画 -->
  <item name="android:windowanimationstyle">@style/actionsheetdialoganimation</item>
 </style>
 <!-- actionsheet进出动画 -->
 <style name="actionsheetdialoganimation" parent="@android:style/animation.dialog">
  <item name="android:windowenteranimation">@anim/actionsheet_dialog_in</item>
  <item name="android:windowexitanimation">@anim/actionsheet_dialog_out</item>
 </style>
 
 <style name="splashtheme" parent="apptheme">
  <!-- 这里的trans自己写一个#00000000即可-->
  <item name="android:windowbackground">@drawable/layer_splash</item>
  <item name="windownotitle">true</item>
  <item name="android:windowfullscreen">true</item>
 </style>

弹入弹出动画效果：

anim下新建：弹入资源文件actionsheet_dialog_in和弹出资源文件actionsheet_dialog_out

<?xml version="1.0" encoding="utf-8"?>
<translate xmlns:android="http://schemas.android.com/apk/res/android"
 android:duration="200"
 android:fromydelta="100%"
 android:toydelta="0" />
<?xml version="1.0" encoding="utf-8"?>
<translate xmlns:android="http://schemas.android.com/apk/res/android"
 android:duration="200"
 android:fromydelta="0"
 android:toydelta="100%" />

自定义弹窗布局dialog_cj_num：

<?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="match_parent"
 android:background="#f9f9f9"
 android:orientation="vertical">
 
 <textview
  android:layout_width="match_parent"
  android:layout_height="40dp"
  android:gravity="center"
  android:text="餐具选择"
  android:textcolor="#333333"
  android:textsize="16sp" />
 
 <view
  android:layout_width="match_parent"
  android:layout_height="1dp"
  android:background="#e8e8e8" />
 
 <com.shanjing.mymeishi.view.pickvalueview
  android:id="@+id/pickstring"
  android:layout_width="match_parent"
  android:layout_height="wrap_content" />
 
 <view
  android:layout_width="match_parent"
  android:layout_height="1dp"
  android:background="#e8e8e8" />
 
 <textview
  android:id="@+id/tv_cancel"
  android:layout_width="match_parent"
  android:layout_height="40dp"
  android:gravity="center"
  android:text="取消"
  android:textcolor="#333333"
  android:textsize="16sp" />
</linearlayout>

自定义视图pickvalueview和引用类mynumberpicker：

package com.shanjing.mymeishi.view;
 
import android.content.context;
import android.graphics.color;
import android.util.attributeset;
import android.view.gravity;
import android.view.viewgroup;
import android.widget.linearlayout;
import android.widget.numberpicker;
import android.widget.textview;
 
/**
 * 选择日期视图
 */
 
public class pickvalueview extends linearlayout implements numberpicker.onvaluechangelistener {
 private context mcontext;
 /**
  * 组件 标题、单位、滚轮
  */
 private textview mtitleleft, mtitlemiddle, mtitleright;
 private textview munitleft, munitmiddle, munitright;
 private mynumberpicker mnpleft, mnpmiddle, mnpright;
 /**
  * 数据个数 1列 or 2列 or 3列
  */
 private int mviewcount = 1;
 /**
  * 一组数据长度
  */
 private final int data_size = 3;
 
 /**
  * 需要设置的值与默认值
  */
 private object[] mleftvalues;
 private object[] mmiddlevalues;
 private object[] mrightvalues;
 private object mdefaultleftvalue;
 private object mdefaultmiddlevalue;
 private object mdefaultrightvalue;
 /**
  * 当前正在显示的值
  */
 private object[] mshowingleft = new object[data_size];
 private object[] mshowingmiddle = new object[data_size];
 private object[] mshowingright = new object[data_size];
 
 /**
  * 步长
  */
 private int mleftstep = 5;
 private int mmiddlestep = 1;
 private int mrightstep = 1;
 /**
  * 回调接口对象
  */
 private onselectedchangelistener mselectedchangelistener;
 
 public pickvalueview(context context) {
  super(context);
  this.mcontext = context;
  generateview();
 }
 
 public pickvalueview(context context, attributeset attrs) {
  super(context, attrs);
  this.mcontext = context;
  generateview();
 }
 
 public pickvalueview(context context, attributeset attrs, int defstyleattr) {
  super(context, attrs, defstyleattr);
  this.mcontext = context;
  generateview();
 }
 
 /**
  * 生成视图
  */
 private void generateview() {
  //标题
  linearlayout titlelayout = new linearlayout(mcontext);
  layoutparams titleparams = new layoutparams(viewgroup.layoutparams.match_parent, viewgroup.layoutparams.wrap_content);
  titleparams.setmargins(0, 0, 0, dip2px(12));
  titlelayout.setlayoutparams(new layoutparams(viewgroup.layoutparams.match_parent, viewgroup.layoutparams.wrap_content));
  titlelayout.setorientation(horizontal);
  mtitleleft = new textview(mcontext);
  mtitlemiddle = new textview(mcontext);
  mtitleright = new textview(mcontext);
 
  layoutparams params = new layoutparams(0, viewgroup.layoutparams.wrap_content, 1);
  textview[] titles = new textview[]{mtitleleft, mtitlemiddle, mtitleright};
  for (int i = 0; i < titles.length; i++) {
   titles[i].setlayoutparams(params);
   titles[i].setgravity(gravity.center);
   titles[i].settextcolor(color.parsecolor("#000000"));
   titles[i].settextsize(12);
  }
  titlelayout.addview(mtitleleft);
  titlelayout.addview(mtitlemiddle);
  titlelayout.addview(mtitleright);
  //内容
  linearlayout contentlayout = new linearlayout(mcontext);
  contentlayout.setlayoutparams(new layoutparams(viewgroup.layoutparams.match_parent, viewgroup.layoutparams.wrap_content));
  contentlayout.setorientation(horizontal);
  contentlayout.setgravity(gravity.center);
  mnpleft = new mynumberpicker(mcontext);
  mnpmiddle = new mynumberpicker(mcontext);
  mnpright = new mynumberpicker(mcontext);
  munitleft = new textview(mcontext);
  munitmiddle = new textview(mcontext);
  munitright = new textview(mcontext);
 
  mynumberpicker[] nps = new mynumberpicker[]{mnpleft, mnpmiddle, mnpright};
  for (int i = 0; i < nps.length; i++) {
   nps[i].setlayoutparams(params);
   nps[i].setdescendantfocusability(focus_block_descendants);
   nps[i].setonvaluechangedlistener(this);
  }
 
  contentlayout.addview(mnpleft);
  contentlayout.addview(munitleft);
  contentlayout.addview(mnpmiddle);
  contentlayout.addview(munitmiddle);
  contentlayout.addview(mnpright);
  contentlayout.addview(munitright);
 
  this.setlayoutparams(new layoutparams(viewgroup.layoutparams.match_parent, viewgroup.layoutparams.wrap_content));
  this.setorientation(vertical);
  this.addview(titlelayout);
  this.addview(contentlayout);
 }
 
 /**
  * 初始化数据和值
  */
 private void initviewandpicker() {
  if (mviewcount == 1) {
   this.mnpmiddle.setvisibility(gone);
   this.mnpright.setvisibility(gone);
   this.munitmiddle.setvisibility(gone);
   this.munitright.setvisibility(gone);
  } else if (mviewcount == 2) {
   this.mnpright.setvisibility(gone);
   this.munitright.setvisibility(gone);
  }
 
  //初始化数组值
  if (mleftvalues != null && mleftvalues.length != 0) {
   if (mleftvalues.length < data_size) {
    for (int i = 0; i < mleftvalues.length; i++) {
     mshowingleft[i] = mleftvalues[i];
    }
    for (int i = mleftvalues.length; i < data_size; i++) {
     mshowingleft[i] = -9999;
    }
   } else {
    for (int i = 0; i < data_size; i++) {
     mshowingleft[i] = mleftvalues[i];
    }
   }
   mnpleft.setminvalue(0);
   mnpleft.setmaxvalue(data_size - 1);
   if (mdefaultleftvalue != null)
    updateleftview(mdefaultleftvalue);
   else
    updateleftview(mshowingleft[0]);
  }
  /**
   * 中间控件
   */
  if (mviewcount == 2 || mviewcount == 3) {
   if (mmiddlevalues != null && mmiddlevalues.length != 0) {
    if (mmiddlevalues.length < data_size) {
     for (int i = 0; i < mmiddlevalues.length; i++) {
      mshowingmiddle[i] = mmiddlevalues[i];
     }
     for (int i = mmiddlevalues.length; i < data_size; i++) {
      mshowingmiddle[i] = -9999;
     }
    } else {
     for (int i = 0; i < data_size; i++) {
      mshowingmiddle[i] = mmiddlevalues[i];
     }
    }
    mnpmiddle.setminvalue(0);
    mnpmiddle.setmaxvalue(data_size - 1);
    if (mdefaultmiddlevalue != null)
     updatemiddleview(mdefaultmiddlevalue);
    else
     updatemiddleview(mshowingmiddle[0]);
   }
  }
 
  /**
   * 右侧控件
   */
  if (mviewcount == 3) {
   if (mrightvalues != null && mrightvalues.length != 0) {
    if (mrightvalues.length < data_size) {
     for (int i = 0; i < mrightvalues.length; i++) {
      mshowingright[i] = mrightvalues[i];
     }
     for (int i = mrightvalues.length; i < data_size; i++) {
      mshowingright[i] = -9999;
     }
    } else {
     for (int i = 0; i < data_size; i++) {
      mshowingright[i] = mrightvalues[i];
     }
    }
    mnpright.setminvalue(0);
    mnpright.setmaxvalue(data_size - 1);
    if (mdefaultrightvalue != null)
     updaterightview(mdefaultrightvalue);
    else
     updaterightview(mshowingright[0]);
   }
  }
 
 
 }
 
 private void updateleftview(object value) {
  updatevalue(value, 0);
 }
 
 private void updatemiddleview(object value) {
  updatevalue(value, 1);
 }
 
 private void updaterightview(object value) {
  updatevalue(value, 2);
 }
 
 /**
  * 更新滚轮视图
  *
  * @param value
  * @param index
  */
 private void updatevalue(object value, int index) {
  string showstr[] = new string[data_size];
  mynumberpicker picker;
  object[] showingvalue;
  object[] values;
  int step;
  if (index == 0) {
   picker = mnpleft;
   showingvalue = mshowingleft;
   values = mleftvalues;
   step = mleftstep;
  } else if (index == 1) {
   picker = mnpmiddle;
   showingvalue = mshowingmiddle;
   values = mmiddlevalues;
   step = mmiddlestep;
  } else {
   picker = mnpright;
   showingvalue = mshowingright;
   values = mrightvalues;
   step = mrightstep;
  }
 
  if (values instanceof integer[]) {
   for (int i = 0; i < data_size; i++) {
    showingvalue[i] = (int) value - step * (data_size / 2 - i);
    int offset = (int) values[values.length - 1] - (int) values[0] + step;
    if ((int) showingvalue[i] < (int) values[0]) {
     showingvalue[i] = (int) showingvalue[i] + offset;
    }
    if ((int) showingvalue[i] > (int) values[values.length - 1]) {
     showingvalue[i] = (int) showingvalue[i] - offset;
    }
    showstr[i] = "" + showingvalue[i];
   }
  } else {
   int strindex = 0;
   for (int i = 0; i < values.length; i++) {
    if (values[i].equals(value)) {
     strindex = i;
     break;
    }
   }
   for (int i = 0; i < data_size; i++) {
    int temp = strindex - (data_size / 2 - i);
    if (temp < 0) {
     temp += values.length;
    }
    if (temp >= values.length) {
     temp -= values.length;
    }
    showingvalue[i] = values[temp];
    showstr[i] = (string) values[temp];
   }
  }
  picker.setdisplayedvalues(showstr);
  picker.setvalue(data_size / 2);
  picker.postinvalidate();
 }
 
 
 @override
 public void onvaluechange(numberpicker picker, int oldval, int newval) {
  if (picker == mnpleft) {
   updateleftview(mshowingleft[newval]);
  } else if (picker == mnpmiddle) {
   updatemiddleview(mshowingmiddle[newval]);
  } else if (picker == mnpright) {
   updaterightview(mshowingright[newval]);
  }
  if (mselectedchangelistener != null) {
   mselectedchangelistener.onselected(this, mshowingleft[data_size / 2], mshowingmiddle[data_size / 2], mshowingright[data_size / 2]);
  }
 }
 
 /**
  * 设置数据--单列数据
  *
  * @param leftvalues
  * @param mdefaultleftvalue
  */
 public void setvaluedata(object[] leftvalues, object mdefaultleftvalue) {
  this.mviewcount = 1;
  this.mleftvalues = leftvalues;
  this.mdefaultleftvalue = mdefaultleftvalue;
 
  initviewandpicker();
 }
 
 /**
  * 设置数据--两列数据
  *
  * @param leftvalues
  * @param mdefaultleftvalue
  * @param middlevalues
  * @param defaultmiddlevalue
  */
 public void setvaluedata(object[] leftvalues, object mdefaultleftvalue, object[] middlevalues, object defaultmiddlevalue) {
  this.mviewcount = 2;
  this.mleftvalues = leftvalues;
  this.mdefaultleftvalue = mdefaultleftvalue;
 
  this.mmiddlevalues = middlevalues;
  this.mdefaultmiddlevalue = defaultmiddlevalue;
 
  initviewandpicker();
 }
 
 /**
  * 设置数据--三列数据
  *
  * @param leftvalues
  * @param mdefaultleftvalue
  * @param middlevalues
  * @param defaultmiddlevalue
  * @param rightvalues
  * @param defaultrightvalue
  */
 public void setvaluedata(object[] leftvalues, object mdefaultleftvalue, object[] middlevalues, object defaultmiddlevalue, object[] rightvalues, object defaultrightvalue) {
  this.mviewcount = 3;
  this.mleftvalues = leftvalues;
  this.mdefaultleftvalue = mdefaultleftvalue;
 
  this.mmiddlevalues = middlevalues;
  this.mdefaultmiddlevalue = defaultmiddlevalue;
 
  this.mrightvalues = rightvalues;
  this.mdefaultrightvalue = defaultrightvalue;
 
  initviewandpicker();
 }
 
 /**
  * 设置左边数据步长
  *
  * @param step
  */
 public void setleftstep(int step) {
  this.mleftstep = step;
  initviewandpicker();
 }
 
 /**
  * 设置中间数据步长
  *
  * @param step
  */
 public void setmiddlestep(int step) {
  this.mmiddlestep = step;
  initviewandpicker();
 }
 
 /**
  * 设置右边数据步长
  *
  * @param step
  */
 public void setrightstep(int step) {
  this.mrightstep = step;
  initviewandpicker();
 }
 
 /**
  * 设置标题
  *
  * @param left
  * @param middle
  * @param right
  */
 public void settitle(string left, string middle, string right) {
  if (left != null) {
   mtitleleft.setvisibility(visible);
   mtitleleft.settext(left);
  } else {
   mtitleleft.setvisibility(gone);
  }
  if (middle != null) {
   mtitlemiddle.setvisibility(visible);
   mtitlemiddle.settext(middle);
  } else {
   mtitlemiddle.setvisibility(gone);
  }
  if (right != null) {
   mtitleright.setvisibility(visible);
   mtitleright.settext(right);
  } else {
   mtitleright.setvisibility(gone);
  }
  this.postinvalidate();
 }
 
 public void setunitleft(string unitleft) {
  setunit(unitleft, 0);
 }
 
 public void setmunitmiddle(string unitmiddle) {
  setunit(unitmiddle, 1);
 }
 
 public void setunitright(string unitright) {
  setunit(unitright, 2);
 }
 
 private void setunit(string unit, int index) {
  textview tvunit;
  if (index == 0) {
   tvunit = munitleft;
  } else if (index == 1) {
   tvunit = munitmiddle;
  } else {
   tvunit = munitright;
  }
  if (unit != null) {
   tvunit.settext(unit);
  } else {
   tvunit.settext(" ");
  }
  initviewandpicker();
 }
 
 /**
  * 设置回调
  *
  * @param listener
  */
 public void setonselectedchangelistener(onselectedchangelistener listener) {
  this.mselectedchangelistener = listener;
 }
 
 /**
  * dp转px
  *
  * @param dp
  * @return
  */
 private int dip2px(int dp) {
  float scale = mcontext.getresources().getdisplaymetrics().density;
  return (int) (scale * dp + 0.5f);
 }
 
 /**
  * 回调接口
  */
 public interface onselectedchangelistener {
  void onselected(pickvalueview view, object leftvalue, object middlevalue, object rightvalue);
 }
}

package com.shanjing.mymeishi.view;
 
import android.content.context;
import android.graphics.canvas;
import android.graphics.color;
import android.graphics.paint;
import android.graphics.rect;
import android.graphics.drawable.colordrawable;
import android.graphics.drawable.drawable;
import android.util.attributeset;
import android.util.sparsearray;
import android.util.typedvalue;
import android.view.view;
import android.view.viewgroup;
import android.widget.edittext;
import android.widget.numberpicker;
 
import java.lang.reflect.field;
 
public class mynumberpicker extends numberpicker {
 private context mcontext;
 numberpicker picker;
 
 public mynumberpicker(context context) {
  super(context);
  picker = this;
  mcontext = context;
 }
 
 public mynumberpicker(context context, attributeset attrs) {
  super(context, attrs);
  picker = this;
  mcontext = context;
 }
 
 public mynumberpicker(context context, attributeset attrs, int defstyleattr) {
  super(context, attrs, defstyleattr);
  picker = this;
  mcontext = context;
 }
 
 @override
 public void addview(view child) {
  super.addview(child);
  updateview(child);
 }
 
 @override
 public void addview(view child, int index, viewgroup.layoutparams params) {
  super.addview(child, index, params);
  updateview(child);
 }
 
 @override
 public void addview(view child, viewgroup.layoutparams params) {
  super.addview(child, params);
  updateview(child);
 }
 
 private void updateview(view view) {
  if (view instanceof edittext) {
   ((edittext) view).settextsize(typedvalue.complex_unit_sp, 20);
   ((edittext) view).settextcolor(color.parsecolor("#000000"));//进入时滚轴显示颜色
  }
 }
 
 private int mright, mleft, mbottom;
 private int mtopselectiondividertop;
 private int mbottomselectiondividerbottom;
 private int[] mselectorindices;
 private int mscrollstate;
 private sparsearray<string> mselectorindextostringcache;
 private edittext minputtext;
 private paint mselectorwheelpaint;
 private int mselectorelementheight;
 private int mcurrentscrolloffset;
 private boolean mhasselectorwheel;
 private boolean mhidewheeluntilfocused;
 private drawable mselectiondivider;
 
 /**
  * 通过反射获取值
  */
 private void getmyvalue() {
  mleft = super.getleft();
  mright = super.getright();
  mbottom = super.getbottom();
  field[] pickerfields = numberpicker.class.getdeclaredfields();
  for (field field : pickerfields) {
   field.setaccessible(true);
   if (field.getname().equals("mselectorwheelpaint")) {
    try {
     mselectorwheelpaint = (paint) field.get(picker);
    } catch (illegalaccessexception e) {
     e.printstacktrace();
    }
    break;
   }
  }
  for (field field : pickerfields) {
   field.setaccessible(true);
   if (field.getname().equals("mselectorelementheight")) {
    try {
     mselectorelementheight = (int) field.get(picker);
    } catch (illegalaccessexception e) {
     e.printstacktrace();
    }
    break;
   }
  }
  for (field field : pickerfields) {
   field.setaccessible(true);
   if (field.getname().equals("mcurrentscrolloffset")) {
    try {
     mcurrentscrolloffset = (int) field.get(picker);
    } catch (illegalaccessexception e) {
     e.printstacktrace();
    }
    break;
   }
  }
  for (field field : pickerfields) {
   field.setaccessible(true);
   if (field.getname().equals("minputtext")) {
    try {
     minputtext = (edittext) field.get(picker);
    } catch (illegalaccessexception e) {
     e.printstacktrace();
    }
    break;
   }
  }
  for (field field : pickerfields) {
   field.setaccessible(true);
   if (field.getname().equals("mselectorindextostringcache")) {
    try {
     mselectorindextostringcache = (sparsearray<string>) field.get(picker);
    } catch (illegalaccessexception e) {
     e.printstacktrace();
    }
    break;
   }
  }
  for (field field : pickerfields) {
   field.setaccessible(true);
   if (field.getname().equals("mselectorindices")) {
    try {
     mselectorindices = (int[]) field.get(picker);
    } catch (illegalaccessexception e) {
     e.printstacktrace();
    }
    break;
   }
  }
  for (field field : pickerfields) {
   field.setaccessible(true);
   if (field.getname().equals("mhasselectorwheel")) {
    try {
     mhasselectorwheel = (boolean) field.get(picker);
    } catch (illegalaccessexception e) {
     e.printstacktrace();
    }
    break;
   }
  }
  for (field field : pickerfields) {
   field.setaccessible(true);
   if (field.getname().equals("mhidewheeluntilfocused")) {
    try {
     mhidewheeluntilfocused = (boolean) field.get(picker);
    } catch (illegalaccessexception e) {
     e.printstacktrace();
    }
    break;
   }
  }
//  for (field field : pickerfields) {
//   field.setaccessible(true);
//   if (field.getname().equals("mdecrementvirtualbuttonpressed")) {
//    try {
//     mdecrementvirtualbuttonpressed = (boolean) field.get(picker);
//    } catch (illegalaccessexception e) {
//     e.printstacktrace();
//    }
//    break;
//   }
//  }
//  for (field field : pickerfields) {
//   field.setaccessible(true);
//   if (field.getname().equals("mincrementvirtualbuttonpressed")) {
//    try {
//     mincrementvirtualbuttonpressed = (boolean) field.get(picker);
//    } catch (illegalaccessexception e) {
//     e.printstacktrace();
//    }
//    break;
//   }
//  }
//  for (field field : pickerfields) {
//   field.setaccessible(true);
//   if (field.getname().equals("mvirtualbuttonpresseddrawable")) {
//    try {
//     mvirtualbuttonpresseddrawable = (drawable) field.get(picker);
//    } catch (illegalaccessexception e) {
//     e.printstacktrace();
//    }
//    break;
//   }
//  }
  for (field field : pickerfields) {
   field.setaccessible(true);
   if (field.getname().equals("mscrollstate")) {
    try {
     mscrollstate = (int) field.get(picker);
    } catch (illegalaccessexception e) {
     e.printstacktrace();
    }
    break;
   }
  }
  for (field field : pickerfields) {
   field.setaccessible(true);
   if (field.getname().equals("mtopselectiondividertop")) {
    try {
     mtopselectiondividertop = (int) field.get(picker);
    } catch (illegalaccessexception e) {
     e.printstacktrace();
    }
    break;
   }
  }
  for (field field : pickerfields) {
   field.setaccessible(true);
   if (field.getname().equals("mbottomselectiondividerbottom")) {
    try {
     mbottomselectiondividerbottom = (int) field.get(picker);
    } catch (illegalaccessexception e) {
     e.printstacktrace();
    }
    break;
   }
  }
  for (field field : pickerfields) {
   field.setaccessible(true);
   if (field.getname().equals("mselectiondivider")) {
    try {
     mselectiondivider = (drawable) field.get(picker);
    } catch (illegalaccessexception e) {
     e.printstacktrace();
    }
    break;
   }
  }
 
 }
 
 @override
 protected void ondraw(canvas canvas) {
//  super.ondraw(canvas);
  getmyvalue();
  mselectorwheelpaint.setcolor(color.blue);
 
  if (!mhasselectorwheel) {
   super.ondraw(canvas);
   return;
  }
  final boolean showselectorwheel = mhidewheeluntilfocused ? hasfocus() : true;
  float x = (mright - mleft) / 2;
  float y = mcurrentscrolloffset;
 
//  if (showselectorwheel && mvirtualbuttonpresseddrawable != null
//    && mscrollstate == onscrolllistener.scroll_state_idle) {
//   if (mdecrementvirtualbuttonpressed) {
//    mvirtualbuttonpresseddrawable.setstate(view.pressed_state_set);
//    mvirtualbuttonpresseddrawable.setbounds(0, 0, mright, mtopselectiondividertop);
//    mvirtualbuttonpresseddrawable.draw(canvas);
//   }
//   if (mincrementvirtualbuttonpressed) {
//    mvirtualbuttonpresseddrawable.setstate(pressed_state_set);
//    mvirtualbuttonpresseddrawable.setbounds(0, mbottomselectiondividerbottom, mright,
//      mbottom);
//    mvirtualbuttonpresseddrawable.draw(canvas);
//   }
//  }
 
  int[] selectorindices = mselectorindices;
  for (int i = 0; i < selectorindices.length; i++) {
   int selectorindex = selectorindices[i];
   string scrollselectorvalue = mselectorindextostringcache.get(selectorindex);
   if (i != 1) {
    mselectorwheelpaint.setcolor(color.black);
    mselectorwheelpaint.settextsize(sp2px(16));
   } else {
    mselectorwheelpaint.setcolor(color.parsecolor("#000000"));//滑动时当前滚轴上的内容颜色
    mselectorwheelpaint.settextsize(sp2px(20));
   }
 
   if ((showselectorwheel && i != 1) ||
     (i == 1 && minputtext.getvisibility() != visible)) {
    rect mrect = new rect();
    mselectorwheelpaint.gettextbounds(scrollselectorvalue, 0, scrollselectorvalue.length(), mrect);
    canvas.drawtext(scrollselectorvalue, x, y, mselectorwheelpaint);
   }
   y += mselectorelementheight;
  }
 
  // draw the selection dividers
  if (showselectorwheel && mselectiondivider != null) {
   mselectiondivider = new colordrawable(color.parsecolor("#a0c4c4c4"));//滚轴线的颜色
   // draw the top divider
   int topoftopdivider = mtopselectiondividertop;
   int bottomoftopdivider = topoftopdivider + 2;
   mselectiondivider.setbounds(0, topoftopdivider, mright, bottomoftopdivider);
   mselectiondivider.draw(canvas);
 
   // draw the bottom divider
   int bottomofbottomdivider = mbottomselectiondividerbottom;
   int topofbottomdivider = bottomofbottomdivider - 2;
   mselectiondivider.setbounds(0, topofbottomdivider, mright, bottomofbottomdivider);
   mselectiondivider.draw(canvas);
  }
 }
 
 private int sp2px(int sp) {
  float scale = mcontext.getresources().getdisplaymetrics().scaleddensity;
  return (int) (scale * sp + 0.5f);
 }
}

用法：

先实现pickvalueview.onselectedchangelistener

然后textview显示：

@override
public void onselected(pickvalueview view, object leftvalue, object middlevalue, object rightvalue) {
 string selectedstr = (string) leftvalue;
 tv_cj_num.settext(selectedstr);
}

完成，自定义弹窗里可以修改一些属性。

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。