最近怎么老写View，可能写view比较方便，写其它东西还要抽时间整理总结，写View就直接封完写出来就行。
准备国庆放假，无心工作，那就写篇简单实用一点的文章，总不能白白浪费了时间。
一.需求
有时候ios端会用到条件选择器，好像是那边自带的，而android这边是没有的，但是为了两端统一，没办法，只能我们去迁就他们了（你让一个有自带的去写自定义是基本不可能的事）。
最经典的是我们有选择地址的需求，比如美团这里的：
image.png
这个android是原生是没有的，只有能选择日期的。那怎么办？自定义，好像略难，那就用三方的吧。
https://github.com/Bigkoo/Android-PickerView
image.png
我找了很多，就觉得这个库是做得比较好，比较完整的，而且也一直有在维护，还是比较推荐，使用起来也比较方便。项目里有很清晰的文档，建议看之前先浏览过文档。
二.效果展示
我使用的效果：
image.png
我还是顺便把源码也浏览了下。发现这里有3个比较重要的类，这个之后会简单的介绍：
（1）WheelView
（2）条件选择的WheelOptions，我感觉这个类的封装有点vm的意思
（3）最外层封装的OptionsPickerView
三.扩展
如果只是为了选择地址的话直接用它封装好的就行，但是有时候可能会需要用到其它的布局或需求，那我们就要在它原有的功能上进行扩展，比如说我写的这个时间段的现在，直接用是没有的，需要自己扩展。
image.png
而要进行扩展的话，就要先浏览源码看看它内部怎么写的。
可以从调用的地方找到OptionsPickerView类
OptionsPickerView pvOptions1 = new OptionsPickerView.Builder(this, new OptionsPickerView.OnOptionsSelectListener() {
@Override
public void onOptionsSelect(int options1, int options2, int options3, View v) {
// todo 点击确认之后的操作
}
})
.setTitleText("选择地区")
.build();
pvOptions1.setPicker(items1, items2,items3);//二级选择器
pvOptions1.show();
然后看看OptionsPickerView类内部，你会发现很多方法，但是基本都是builder方法个getset方法，我们可以找到重要的几个方法。
private void initView(Context context) {
setDialogOutSideCancelable(cancelable);
initViews(backgroundId);
init();
initEvents();
if (customListener == null) {
LayoutInflater.from(context).inflate(layoutRes, contentContainer);
//顶部标题
tvTitle = (TextView) findViewById(R.id.tvTitle);
rv_top_bar = (RelativeLayout)findViewById(R.id.rv_topbar);
//确定和取消按钮
btnSubmit = (Button) findViewById(R.id.btnSubmit);
btnCancel = (Button) findViewById(R.id.btnCancel);
btnSubmit.setTag(TAG_SUBMIT);
btnCancel.setTag(TAG_CANCEL);
btnSubmit.setOnClickListener(this);
btnCancel.setOnClickListener(this);
//设置文字
btnSubmit.setText(TextUtils.isEmpty(Str_Submit) ? context.getResources().getString(R.string.pickerview_submit) : Str_Submit);
btnCancel.setText(TextUtils.isEmpty(Str_Cancel) ? context.getResources().getString(R.string.pickerview_cancel) : Str_Cancel);
tvTitle.setText(TextUtils.isEmpty(Str_Title) ? "" : Str_Title);//默认为空
//设置color
btnSubmit.setTextColor(Color_Submit == 0 ? pickerview_timebtn_nor : Color_Submit);
btnCancel.setTextColor(Color_Cancel == 0 ? pickerview_timebtn_nor : Color_Cancel);
tvTitle.setTextColor(Color_Title == 0 ? pickerview_topbar_title : Color_Title);
rv_top_bar.setBackgroundColor(Color_Background_Title == 0 ? pickerview_bg_topbar : Color_Background_Title);
//设置文字大小
btnSubmit.setTextSize(Size_Submit_Cancel);
btnCancel.setTextSize(Size_Submit_Cancel);
tvTitle.setTextSize(Size_Title);
tvTitle.setText(Str_Title);
} else {
customListener.customLayout(LayoutInflater.from(context).inflate(layoutRes, contentContainer));
}
// ----滚轮布局
final LinearLayout optionsPicker = (LinearLayout) findViewById(R.id.optionspicker);
optionsPicker.setBackgroundColor(Color_Background_Wheel == 0 ? bgColor_default : Color_Background_Wheel);
wheelOptions = new WheelOptions(optionsPicker, linkage);
wheelOptions.setTextContentSize(Size_Content);
wheelOptions.setLabels(label1, label2, label3);
wheelOptions.setCyclic(cyclic1, cyclic2, cyclic3);
wheelOptions.setTypeface(font);
setOutSideCancelable(cancelable);
if (tvTitle!= null){
tvTitle.setText(Str_Title);
}
wheelOptions.setDividerColor(dividerColor);
wheelOptions.setDividerType(dividerType);
wheelOptions.setLineSpacingMultiplier(lineSpacingMultiplier);
wheelOptions.setTextColorOut(textColorOut);
wheelOptions.setTextColorCenter(textColorCenter);
wheelOptions.isCenterLabel(isCenterLabel);
}
这里做的是为view设置属性。重要的是这里
final LinearLayout optionsPicker = (LinearLayout) findViewById(R.id.optionspicker);
optionsPicker.setBackgroundColor(Color_Background_Wheel == 0 ? bgColor_default : Color_Background_Wheel);
wheelOptions = new WheelOptions(optionsPicker, linkage);
这里的意思就是把这个View给WheelOptions这个对象，让它来做处理。然后可以看
看布局。
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical">
<include
layout="@layout/include_pickerview_topbar"
android:layout_width="match_parent"
android:layout_height="@dimen/pickerview_topbar_height" />
<LinearLayout
android:id="@+id/optionspicker"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@android:color/white"
android:orientation="horizontal">
<com.bigkoo.pickerview.lib.WheelView
android:id="@+id/options1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1" />
<com.bigkoo.pickerview.lib.WheelView
android:id="@+id/options2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1" />
<com.bigkoo.pickerview.lib.WheelView
android:id="@+id/options3"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1" />
</LinearLayout>
</LinearLayout>
可以看出它里面是写死固定就是3列。其实我不太赞成这样的做法，对于这样的多情况view的封装，我个人还是比较喜欢做动态的。由于这里固定是3列，所以我上图中4列的情况直接使用是实现不了的，所以需要扩展。这里的WheelView就是单列
1.重写布局
它这里布局写死了固定3列，那我肯定是没法复用它的这个布局了，所以就只能重写布局。
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical">
<include
layout="@layout/include_pickerview_topbar"
android:layout_width="match_parent"
android:layout_height="@dimen/pickerview_topbar_height" />
<LinearLayout
android:id="@+id/optionspicker"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@android:color/white"
android:orientation="horizontal">
</LinearLayout>
</LinearLayout>
我只写了LinearLayout，就是要动态去添加WheelView。
2.重写OptionsPickerView
原本的OptionsPickerView中
image.png
在builder构造时就固定了布局，所以我这不好扩展，不如重写一个OptionsPickerView，当然重写Builder也行，但是我觉得重写OptionsPickerView比较好。而且他原本只有两个类
image.png
所以我们需要继承BasePickerView重写一个PickerView，他原本内部的逻辑没问题，我就抄过来用好了。
public class BerNpickerView<T> extends BasePickerView implements View.OnClickListener {
protected BerWheel<T> berWheel;
private int layoutRes;
private CustomListener customListener;
private Button btnSubmit, btnCancel; //确定、取消按钮
private TextView tvTitle;
private RelativeLayout rv_top_bar;
private static final String TAG_SUBMIT = "submit";
private static final String TAG_CANCEL = "cancel";
private OnOptionsSelectListener optionsSelectListener;
private String Str_Submit;//确定按钮文字
private String Str_Cancel;//取消按钮文字
private String Str_Title;//标题文字
private int Color_Submit;//确定按钮颜色
private int Color_Cancel;//取消按钮颜色
private int Color_Title;//标题颜色
private int Color_Background_Wheel;//滚轮背景颜色
private int Color_Background_Title;//标题背景颜色
private int Size_Submit_Cancel;//确定取消按钮大小
private int Size_Title;//标题文字大小
private int Size_Content;//内容文字大小
private int textColorOut; //分割线以外的文字颜色
private int textColorCenter; //分割线之间的文字颜色
private int dividerColor; //分割线的颜色
private int backgroundId; //显示时的外部背景色颜色,默认是灰色
// 条目间距倍数 默认1.6
private float lineSpacingMultiplier = 1.6F;
private boolean isDialog;//是否是对话框模式
private boolean cancelable;//是否能取消
private boolean linkage;//是否联动
private boolean isCenterLabel ;//是否只显示中间的label
private String label1;//单位
private String label2;
private String label3;
private String label4;
private boolean cyclic1;//是否循环
private boolean cyclic2;
private boolean cyclic3;
private Typeface font;//字体样式
private int option1;//默认选中项
private int option2;
private int option3;
private WheelView.DividerType dividerType;//分隔线类型
private int total; // 列表数量
public BerNpickerView(Builder builder) {
super(builder.context);
this.optionsSelectListener = builder.optionsSelectListener;
this.Str_Submit = builder.Str_Submit;
this.Str_Cancel = builder.Str_Cancel;
this.Str_Title = builder.Str_Title;
this.Color_Submit = builder.Color_Submit;
this.Color_Cancel = builder.Color_Cancel;
this.Color_Title = builder.Color_Title;
this.Color_Background_Wheel = builder.Color_Background_Wheel;
this.Color_Background_Title = builder.Color_Background_Title;
this.Size_Submit_Cancel = builder.Size_Submit_Cancel;
this.Size_Title = builder.Size_Title;
this.Size_Content = builder.Size_Content;
this.cyclic1 = builder.cyclic1;
this.cyclic2 = builder.cyclic2;
this.cyclic3 = builder.cyclic3;
this.cancelable = builder.cancelable;
this.linkage = builder.linkage;
this.isCenterLabel = builder.isCenterLabel;
this.label1 = builder.label1;
this.label2 = builder.label2;
this.label3 = builder.label3;
this.label4 = builder.label4;
this.font = builder.font;
this.option1 = builder.option1;
this.option2 = builder.option2;
this.option3 = builder.option3;
this.textColorCenter = builder.textColorCenter;
this.textColorOut = builder.textColorOut;
this.dividerColor = builder.dividerColor;
this.lineSpacingMultiplier = builder.lineSpacingMultiplier;
this.customListener = builder.customListener;
this.layoutRes = builder.layoutRes;
this.isDialog = builder.isDialog;
this.dividerType = builder.dividerType;
this.backgroundId = builder.backgroundId;
this.decorView = builder.decorView;
this.total = builder.total;
initView(builder.context);
}
@Override
public void onClick(View v) {
String tag = (String) v.getTag();
if (tag.equals(TAG_SUBMIT)) {
returnData();
}
dismiss();
}
//抽离接口回调的方法
public void returnData() {
if (optionsSelectListener != null) {
List<T> datalist = berWheel.getCurrentItems();
optionsSelectListener.onOptionsSelect(datalist, clickView);
}
}
private void initView(Context context) {
setDialogOutSideCancelable(cancelable);
initViews(backgroundId);
init();
initEvents();
if (customListener == null) {
LayoutInflater.from(context).inflate(layoutRes, contentContainer);
//顶部标题
tvTitle = (TextView) findViewById(com.bigkoo.pickerview.R.id.tvTitle);
rv_top_bar = (RelativeLayout)findViewById(com.bigkoo.pickerview.R.id.rv_topbar);
//确定和取消按钮
btnSubmit = (Button) findViewById(com.bigkoo.pickerview.R.id.btnSubmit);
btnCancel = (Button) findViewById(com.bigkoo.pickerview.R.id.btnCancel);
btnSubmit.setTag(TAG_SUBMIT);
btnCancel.setTag(TAG_CANCEL);
btnSubmit.setOnClickListener(this);
btnCancel.setOnClickListener(this);
//设置文字
btnSubmit.setText(TextUtils.isEmpty(Str_Submit) ? context.getResources().getString(com.bigkoo.pickerview.R.string.pickerview_submit) : Str_Submit);
btnCancel.setText(TextUtils.isEmpty(Str_Cancel) ? context.getResources().getString(com.bigkoo.pickerview.R.string.pickerview_cancel) : Str_Cancel);
tvTitle.setText(TextUtils.isEmpty(Str_Title) ? "" : Str_Title);//默认为空
//设置color
btnSubmit.setTextColor(Color_Submit == 0 ? pickerview_timebtn_nor : Color_Submit);
btnCancel.setTextColor(Color_Cancel == 0 ? pickerview_timebtn_nor : Color_Cancel);
tvTitle.setTextColor(Color_Title == 0 ? pickerview_topbar_title : Color_Title);
rv_top_bar.setBackgroundColor(Color_Background_Title == 0 ? pickerview_bg_topbar : Color_Background_Title);
//设置文字大小
btnSubmit.setTextSize(Size_Submit_Cancel);
btnCancel.setTextSize(Size_Submit_Cancel);
tvTitle.setTextSize(Size_Title);
tvTitle.setText(Str_Title);
} else {
customListener.customLayout(LayoutInflater.from(context).inflate(layoutRes, contentContainer));
}
// ----滚轮布局
final LinearLayout optionsPicker = (LinearLayout) findViewById(com.bigkoo.pickerview.R.id.optionspicker);
optionsPicker.setBackgroundColor(Color_Background_Wheel == 0 ? bgColor_default : Color_Background_Wheel);
createWheel(optionsPicker, context, total);
berWheel.setTextContentSize(Size_Content);
// berWheel.setLabels(label1, label2, label3);
// berWheel.setCyclic(cyclic1, cyclic2, cyclic3);
berWheel.setTypeface(font);
setOutSideCancelable(cancelable);
if (tvTitle!= null){
tvTitle.setText(Str_Title);
}
berWheel.setDividerColor(dividerColor);
berWheel.setDividerType(dividerType);
berWheel.setLineSpacingMultiplier(lineSpacingMultiplier);
berWheel.setTextColorOut(textColorOut);
berWheel.setTextColorCenter(textColorCenter);
berWheel.isCenterLabel(isCenterLabel);
}
/**
* 创建子类BerWheel
*/
protected void createWheel(View view, Context context, int total){
berWheel = new BerWheel(view, context, total);
}
//不联动情况下调用
public void setNPicker(List<List<T>> items) {
berWheel.setNPicker(items);
int[] options = new int[items.size()];
for (int i = 0; i < items.size(); i++) {
options[i] = 0;
}
// SetCurrentItems(options);
}
private void SetCurrentItems(int[] options) {
if(berWheel!=null){
berWheel.setCurrentItems(options);
}
}
/**
* ==================================================================
* builder
* ==============================================================
*/
//建造器
public static class Builder {
private int layoutRes = R.layout.layout_ber_pickerview;
private CustomListener customListener;
private Context context;
private OnOptionsSelectListener optionsSelectListener;
private String Str_Submit;//确定按钮文字
private String Str_Cancel;//取消按钮文字
private String Str_Title;//标题文字
private int Color_Submit;//确定按钮颜色
private int Color_Cancel;//取消按钮颜色
private int Color_Title;//标题颜色
private int Color_Background_Wheel;//滚轮背景颜色
private int Color_Background_Title;//标题背景颜色
private int Size_Submit_Cancel = 17;//确定取消按钮大小
private int Size_Title = 18;//标题文字大小
private int Size_Content = 18;//内容文字大小
private boolean cancelable = true;//是否能取消
private boolean linkage = true;//是否联动
private boolean isCenterLabel = true;//是否只显示中间的label
private int textColorOut; //分割线以外的文字颜色
private int textColorCenter; //分割线之间的文字颜色
private int dividerColor; //分割线的颜色
private int backgroundId; //显示时的外部背景色颜色,默认是灰色
public ViewGroup decorView ;//显示pickerview的根View,默认是activity的根view
// 条目间距倍数 默认1.6
private float lineSpacingMultiplier = 1.6F;
private boolean isDialog;//是否是对话框模式
private String label1;
private String label2;
private String label3;
private String label4;
private boolean cyclic1 = false;//是否循环，默认否
private boolean cyclic2 = false;
private boolean cyclic3 = false;
private Typeface font;
private int option1;//默认选中项
private int option2;
private int option3;
private WheelView.DividerType dividerType;//分隔线类型
private int total = 3; // 列表数量
//Required
public Builder(Context context, OnOptionsSelectListener listener) {
this.context = context;
this.optionsSelectListener = listener;
}
//Option
public Builder setSubmitText(String Str_Cancel) {
this.Str_Submit = Str_Cancel;
return this;
}
public Builder setCancelText(String Str_Cancel) {
this.Str_Cancel = Str_Cancel;
return this;
}
public Builder setTitleText(String Str_Title) {
this.Str_Title = Str_Title;
return this;
}
public Builder isDialog(boolean isDialog) {
this.isDialog = isDialog;
return this;
}
public Builder setSubmitColor(int Color_Submit) {
this.Color_Submit = Color_Submit;
return this;
}
public Builder setCancelColor(int Color_Cancel) {
this.Color_Cancel = Color_Cancel;
return this;
}
/**
* 显示时的外部背景色颜色,默认是灰色
* @param backgroundId
* @return
*/
public Builder setBackgroundId(int backgroundId) {
this.backgroundId = backgroundId;
return this;
}
/**
* 必须是viewgroup
* 设置要将pickerview显示到的容器
* @param decorView
* @return
*/
public Builder setDecorView(ViewGroup decorView) {
this.decorView = decorView;
return this;
}
public Builder setLayoutRes(int res, CustomListener listener) {
this.layoutRes = res;
this.customListener = listener;
return this;
}
public Builder setBgColor(int Color_Background_Wheel) {
this.Color_Background_Wheel = Color_Background_Wheel;
return this;
}
public Builder setTitleBgColor(int Color_Background_Title) {
this.Color_Background_Title = Color_Background_Title;
return this;
}
public Builder setTitleColor(int Color_Title) {
this.Color_Title = Color_Title;
return this;
}
public Builder setSubCalSize(int Size_Submit_Cancel) {
this.Size_Submit_Cancel = Size_Submit_Cancel;
return this;
}
public Builder setTitleSize(int Size_Title) {
this.Size_Title = Size_Title;
return this;
}
public Builder setContentTextSize(int Size_Content) {
this.Size_Content = Size_Content;
return this;
}
public Builder setOutSideCancelable(boolean cancelable) {
this.cancelable = cancelable;
return this;
}
public Builder setLabels(String label1, String label2, String label3) {
this.label1 = label1;
this.label2 = label2;
this.label3 = label3;
return this;
}
/**
* 设置间距倍数,但是只能在1.2-2.0f之间
*
* @param lineSpacingMultiplier
*/
public Builder setLineSpacingMultiplier(float lineSpacingMultiplier) {
this.lineSpacingMultiplier = lineSpacingMultiplier;
return this;
}
/**
* 设置分割线的颜色
*
* @param dividerColor
*/
public Builder setDividerColor(int dividerColor) {
this.dividerColor = dividerColor;
return this;
}
/**
* 设置分割线的类型
*
* @param dividerType
*/
public Builder setDividerType(WheelView.DividerType dividerType) {
this.dividerType = dividerType;
return this;
}
/**
* 设置分割线之间的文字的颜色
*
* @param textColorCenter
*/
public Builder setTextColorCenter(int textColorCenter) {
this.textColorCenter = textColorCenter;
return this;
}
/**
* 设置分割线以外文字的颜色
*
* @param textColorOut
*/
public Builder setTextColorOut(int textColorOut) {
this.textColorOut = textColorOut;
return this;
}
public Builder setTypeface(Typeface font) {
this.font = font;
return this;
}
public Builder setCyclic(boolean cyclic1, boolean cyclic2, boolean cyclic3) {
this.cyclic1 = cyclic1;
this.cyclic2 = cyclic2;
this.cyclic3 = cyclic3;
return this;
}
public Builder setSelectOptions(int option1) {
this.option1 = option1;
return this;
}
public Builder setSelectOptions(int option1, int option2) {
this.option1 = option1;
this.option2 = option2;
return this;
}
public Builder setSelectOptions(int option1, int option2, int option3) {
this.option1 = option1;
this.option2 = option2;
this.option3 = option3;
return this;
}
public Builder isCenterLabel(boolean isCenterLabel) {
this.isCenterLabel = isCenterLabel;
return this;
}
public Builder setTotal(int total) {
this.total = total;
return this;
}
public BerNpickerView build() {
return new BerNpickerView(this);
}
}
/**
* 点击时的接口
*/
public interface OnOptionsSelectListener<T> {
void onOptionsSelect(List<T> datalist, View v);
}
}
修改了
（1）修改布局变成我的布局
（2）然后把创建WheelView给加扩展createWheel(optionsPicker, context, total);因为我不想每次都都写Builder这么多参数，我把这个pickerview当成中间成来弄，让子类继承它来做简单的扩展
3.重写WheelOptions
我们重写个WheelView，因为原本的WheelView是做固定3列的处理，我们需要做成个动态的。
public class BerWheel<T> {
protected View view;
protected LinearLayout llContent;
protected List<WheelView> wvList = new ArrayList<>();
protected List<List<T>> items = new ArrayList<>();
protected OnItemSelectedListener wheelListener_option1;
protected OnItemSelectedListener wheelListener_option2;
//文字的颜色和分割线的颜色
protected int textColorOut;
protected int textColorCenter;
protected int dividerColor;
protected WheelView.DividerType dividerType;
protected Context context;
// 条目间距倍数
protected float lineSpacingMultiplier = 1.6F;
protected int total;// 列表数量
public View getView() {
return view;
}
public void setView(View view) {
this.view = view;
}
public BerWheel(View view, Context context, int total) {
super();
this.view = view;
this.context = context;
this.total = total;
llContent = (LinearLayout) view.findViewById(R.id.optionspicker);
showWheelView();
}
/**
* 设置展示规则 默认为平均分布展示
* 可以定义子类来重写该类来制定展示的规则
*/
protected void showWheelView(){
for (int i = 0; i < total; i++) {
WheelView wheelview = new WheelView(context);
wheelview.setLayoutParams(new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT,1));
wvList.add(wheelview);
llContent.addView(wheelview);
}
}
//不联动情况下
public void setNPicker(List<List<T>> items) {
this.items = items;
int count = wvList.size() > items.size() ? items.size() : wvList.size();
for (int i = 0; i < count; i++) {
if (wvList.get(i) != null) {
wvList.get(i).setVisibility(View.VISIBLE);
wvList.get(i).setAdapter(new ArrayWheelAdapter(items.get(i)));
wvList.get(i).setCurrentItem(0);
wvList.get(i).setIsOptions(true);
}else {
wvList.get(i).setVisibility(View.GONE);
}
}
}
public void setTextContentSize(int textSize) {
for (int i = 0; i < wvList.size(); i++) {
if (wvList.get(i) != null) {
wvList.get(i).setTextSize(textSize);
}
}
}
private void setTextColorOut() {
for (int i = 0; i < wvList.size(); i++) {
if (wvList.get(i) != null) {
wvList.get(i).setTextColorOut(textColorOut);
}
}
}
private void setTextColorCenter() {
for (int i = 0; i < wvList.size(); i++) {
if (wvList.get(i) != null) {
wvList.get(i).setTextColorCenter(textColorCenter);
}
}
}
private void setDividerColor() {
for (int i = 0; i < wvList.size(); i++) {
if (wvList.get(i) != null) {
wvList.get(i).setDividerColor(dividerColor);
}
}
}
private void setDividerType() {
for (int i = 0; i < wvList.size(); i++) {
if (wvList.get(i) != null) {
wvList.get(i).setDividerType(dividerType);
}
}
}
private void setLineSpacingMultiplier() {
for (int i = 0; i < wvList.size(); i++) {
if (wvList.get(i) != null) {
wvList.get(i).setLineSpacingMultiplier(lineSpacingMultiplier);
}
}
}
/**
* 设置选项的单位
*/
public void setLabels(String...label) {
int count = label.length > wvList.size() ? wvList.size() : label.length;
for (int i = 0; i < count; i++) {
if (wvList.get(i) != null && label[i] != null) {
wvList.get(i).setLabel(label[i]);
}
}
}
/**
* 设置是否循环滚动
*
* @param cyclic 是否循环
*/
public void setCyclic(boolean...cyclic) {
int count = cyclic.length > wvList.size() ? wvList.size() : cyclic.length;
for (int i = 0; i < count; i++) {
if (wvList.get(i) != null) {
wvList.get(i).setCyclic(cyclic[i]);
}
}
}
/**
* 设置字体样式
*
* @param font 系统提供的几种样式
*/
public void setTypeface (Typeface font) {
for (int i = 0; i < wvList.size(); i++) {
if (wvList.get(i) != null) {
wvList.get(i).setTypeface(font);
}
}
}
/**
* 分别设置第一二三级是否循环滚动
*/
// public void setCyclic(boolean...cyclic) {
// int count = cyclic.length > wvList.size() ? wvList.size() : cyclic.length;
// for (int i = 0; i < count; i++) {
// if (wvList.get(i) != null) {
// wvList.get(i).setCyclic(cyclic[i]);
// }
// }
// }
public void setCurrentItems(int...option) {
int count = option.length > wvList.size() ? wvList.size() : option.length;
for (int i = 0; i < count; i++) {
if (wvList.get(i) != null) {
wvList.get(i).setCurrentItem(option[i]);
}
}
}
/**
* 设置间距倍数,但是只能在1.2-2.0f之间
*
* @param lineSpacingMultiplier
*/
public void setLineSpacingMultiplier(float lineSpacingMultiplier) {
this.lineSpacingMultiplier = lineSpacingMultiplier;
setLineSpacingMultiplier();
}
/**
* 设置分割线的颜色
*
* @param dividerColor
*/
public void setDividerColor(int dividerColor) {
this.dividerColor = dividerColor;
setDividerColor();
}
/**
* 设置分割线的类型
*
* @param dividerType
*/
public void setDividerType(WheelView.DividerType dividerType) {
this.dividerType = dividerType;
setDividerType();
}
/**
* 设置分割线之间的文字的颜色
*
* @param textColorCenter
*/
public void setTextColorCenter(int textColorCenter) {
this.textColorCenter = textColorCenter;
setTextColorCenter();
}
/**
* 设置分割线以外文字的颜色
*
* @param textColorOut
*/
public void setTextColorOut(int textColorOut) {
this.textColorOut = textColorOut;
setTextColorOut();
}
/**
* Label 是否只显示中间选中项的
*
* @param isCenterLabel
*/
public void isCenterLabel(Boolean isCenterLabel) {
for (int i = 0; i < wvList.size(); i++) {
if (wvList.get(i) != null) {
wvList.get(i).isCenterLabel(isCenterLabel);
}
}
}
public List<T> getCurrentItems() {
List<T> datalist = new ArrayList<>();
for (int i = 0; i < wvList.size(); i++) {
if (wvList.get(i) != null) {
datalist.add(items.get(i).get(wvList.get(i).getCurrentItem()));
}
}
return datalist;
}
}
（1）我多添加了个参数total表示要展示多少列
（2）用List<WheelView> wvList数组来动态创建添加WheelView
（3）用List<List<T>> items 来装每一列的数据（我这个Wheel只做了不关联情况下的多列，关联情况下我没弄）
（4）showWheelView();
protected void showWheelView(){
for (int i = 0; i < total; i++) {
WheelView wheelview = new WheelView(context);
wheelview.setLayoutParams(new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT,1));
wvList.add(wheelview);
llContent.addView(wheelview);
}
}
这个方法做展示的规则，默认是平均展示total列，而如果需要做特殊的展示情况，像我上边一样的，就写个类继承这个类重新这个方法重新展示的规则就行，比如我的时间期间选择器。
@Override
protected void showWheelView() {
for (int i = 0; i < total; i++) {
WheelView wheelview = new WheelView(context);
wheelview.setLayoutParams(new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT,1));
wvList.add(wheelview);
}
View view = new View(context);
LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,3,1);
lp.gravity = Gravity.CENTER;
view.setLayoutParams(lp);
view.setPadding(10,0,10,0);
view.setBackgroundResource(R.color.app_black);
TextView textview1 = new TextView(context);
textview1.setText(":");
LinearLayout.LayoutParams tvlp1 = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
tvlp1.gravity = Gravity.CENTER;
textview1.setLayoutParams(tvlp1);
TextView textview2 = new TextView(context);
textview2.setText(":");
LinearLayout.LayoutParams tvlp2 = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
tvlp2.gravity = Gravity.CENTER;
textview2.setLayoutParams(tvlp2);
llContent.addView(wvList.get(0));
llContent.addView(textview1);
llContent.addView(wvList.get(1));
llContent.addView(view);
llContent.addView(wvList.get(2));
llContent.addView(textview2);
llContent.addView(wvList.get(3));
}
重写这个方法就能展示出自己需要展示的效果
image.png
调用时也很方便。
BerNpickerView testview = new BerTimeBpickerView.Builder(this, new BerNpickerView.OnOptionsSelectListener() {
@Override
public void onOptionsSelect(List datalist, View v) {
}
})
.setTotal(4)
.setTitleText("选择时间段")
.build();
testview.setNPicker(timelist);
testview.show();
四.结束
我讲这篇的目的是为了第一介绍一下这个三方库，还是比较实用的。第二，说下扩展的重要性。第三，放假了实在工作效率低。
