使用NumberPick实现滚动选择

xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="@dimen/selfinspect_title_height"
android:background="@drawable/ipreg_selfinspect_bg"
android:orientation="horizontal"
android:gravity="center_vertical">
<LinearLayout
android:layout_width="@dimen/selfinspect_unit_width"
android:layout_height="wrap_content"
android:paddingLeft="20dp">
<TextView
android:id="@+id/tv_cancel"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="8dp"
android:text="取消"
android:textColor="@color/white"
android:textSize="@dimen/selfinspect_title_font"
/>
</LinearLayout>
<ImageView
android:layout_width="0.5dp"
android:layout_height="fill_parent"
android:layout_marginTop="4dp"
android:layout_marginBottom="4dp"
android:background="@color/white"/>
<LinearLayout
android:layout_width="0dp"
android:layout_weight="1"
android:layout_height="fill_parent"
android:gravity="center">
<TextView
android:id="@+id/tv_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="8dp"
android:text="体重"
android:textColor="@color/white"
android:textSize="@dimen/selfinspect_title_font"
/>
</LinearLayout>
<ImageView
android:layout_width="0.5dp"
android:layout_height="fill_parent"
android:layout_marginTop="4dp"
android:layout_marginBottom="4dp"
android:background="@color/white"/>
<LinearLayout
android:layout_width="@dimen/selfinspect_unit_width"
android:layout_height="wrap_content"
android:paddingRight="20dp"
android:gravity="right">
<TextView
android:id="@+id/tv_sure"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="8dp"
android:text="确定"
android:textColor="@color/white"
android:textSize="@dimen/selfinspect_title_font"
/>
</LinearLayout>
</LinearLayout>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:orientation="horizontal"
android:background="@color/white">

<NumberPicker
android:id="@+id/np_high"
android:layout_marginLeft="@dimen/selfinspect_item_interval"
android:layout_width="0dp"
android:layout_weight="1"

4000
android:layout_height="wrap_content"
/>

<TextView
android:id="@+id/tv_dot"
android:layout_width="@dimen/selfinspect_item_interval"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:textColor="@color/selfinspect_font"
android:textSize="@dimen/selfinspect_unit_font"
android:gravity="center"
android:textStyle="bold"
android:text="." />

<NumberPicker
android:id="@+id/np_low"
android:layout_width="0dp"
android:layout_weight="1"
android:layout_height="wrap_content" />

<TextView
android:id="@+id/tv_unit"
android:layout_width="@dimen/selfinspect_unit_width"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:textColor="@color/selfinspect_font"
android:textSize="@dimen/selfinspect_unit_font"
android:gravity="center"
android:textStyle="bold"
android:text="kg" />
</LinearLayout>

</LinearLayout>

java

package com._186soft.app.util;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.NumberPicker;
import android.widget.NumberPicker.OnValueChangeListener;
import android.widget.TextView;

import com.preg.app.R;

public class SelfInspectDialogUtil{
private static ViewHolder holder=new ViewHolder();
public static String result=null,high=null,low=null;
public static void inspectPickDialog(Activity activity,
int minValue,String unit,final TextView tv_item){
LayoutInflater mInflater=LayoutInflater.from(activity);
View myView=mInflater.inflate(R.layout.selfinspect_number_picker, null);
holder.tv_unit=(TextView) myView.findViewById(R.id.tv_unit);
holder.tv_dot=(TextView) myView.findViewById(R.id.tv_dot);
holder.np_high = (NumberPicker) myView.findViewById(R.id.np_high);
holder.np_low = (NumberPicker) myView.findViewById(R.id.np_low);
holder.tv_cancel=(TextView) myView.findViewById(R.id.tv_cancel);
holder.tv_sure=(TextView) myView.findViewById(R.id.tv_sure);
holder.tv_title=(TextView) myView.findViewById(R.id.tv_title);
holder.tv_title.setText(title);
holder.tv_unit.setText(unit);
if(title.equals("胎动")){
holder.tv_dot.setVisibility(View.GONE);
holder.np_low.setVisibility(View.GONE);
}
//创建对话框实例
final Dialog dialog = new AlertDialog.Builder(activity).create();
//设置选择器监听事件
holder.np_high.setOnValueChangedListener(new OnValueChangeListener() {

@Override
public void onValueChange(NumberPicker picker,
int oldVal, int newVal) {
// TODO Auto-generated method stub
high=String.valueOf(newVal);
}
});
//设置选择器的最大值,最小值,默认值
holder.np_high.setMaxValue(maxValue);
holder.np_high.setMinValue(minValue);
holder.np_high.setValue(defValue);
high=String.valueOf(defValue);
low=String.valueOf(0);
holder.np_low.setMaxValue(9);
holder.np_low.setMinValue(0);
holder.np_low.setValue(0);
holder.np_low.setOnValueChangedListener(new OnValueChangeListener() {

@Override
public void onValueChange(NumberPicker picker,
int oldVal, int newVal) {
// TODO Auto-generated method stub
low=String.valueOf(newVal);;
}
});
dialog.show();
//对话框的大小
dialog.getWindow().setLayout(ViewGroup.LayoutParams.MATCH_PARENT,
ViewGroup.LayoutParams.WRAP_CONTENT);
//设置对话框布局
dialog.getWindow().setContentView(myView);
//对话框位置
dialog.getWindow().setGravity(Gravity.BOTTOM);

holder.tv_sure.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
if(title.equals("胎动")){
result=high;
}else{
result=high+"."+low;
}
tv_item.setText(result);
dialog.dismiss();
}
});
holder.tv_cancel.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
dialog.dismiss();
}
});
}
static class ViewHolder {
TextView tv_cancel,tv_sure,tv_unit,tv_title,tv_dot;
NumberPicker np_high,np_low;
}
}

SelfInspectDialogUtil.inspectPickDialog(HealthDataActivity.this,

"身高", 160, 220, 100,"cm",tv_height);

private void setDividerColor(NumberPicker picker, int color) {

java.lang.reflect.Field[] pickerFields =
NumberPicker.class.getDeclaredFields();
for (java.lang.reflect.Field pf : pickerFields) {
if (pf.getName().equals("mSelectionDivider")) {
pf.setAccessible(true);
try {
ColorDrawable colorDrawable = new ColorDrawable(color);
pf.set(picker, colorDrawable);
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (Resources.NotFoundException e) {
e.printStackTrace();
}
catch (IllegalAccessException e) {
e.printStackTrace();
}
break;
}
}
}