Android DatePicker,NumPicker解析(实例)
DatePicker
Android提供了一个选择日期的控件——DatePicker,基本的用法就不说了,在用的过程中会出现几个问题，分割线的颜色无法改变，字体大小，以及DatePicker的整体大小调整，下面就来解决这些问题.。
1.更改DatePicker分割线的颜色
/** * 设置时间选择器的分割线颜色 * * @param datePicker */ private void setDatePickerDividerColor(DatePicker datePicker) { // Divider changing: // 获取 mSpinners LinearLayout llFirst = (LinearLayout) datePicker.getChildAt(0); // 获取 NumberPicker LinearLayout mSpinners = (LinearLayout) llFirst.getChildAt(0); for (int i = 0; i < mSpinners.getChildCount(); i++) { NumberPicker picker = (NumberPicker) mSpinners.getChildAt(i); Field[] pickerFields = NumberPicker.class.getDeclaredFields() for (Field pf : pickerFields) { if (pf.getName().equals("mSelectionDivider")) { pf.setAccessible(true); try { pf.set(picker, new ColorDrawable(Color.parseColor("#bd1b21")));//设置分割线颜色 } catch (IllegalArgumentException e) { e.printStackTrace(); } catch (Resources.NotFoundException e) { e.printStackTrace(); } catch (IllegalAccessException e) { e.printStackTrace(); } break; } } } }
2.更改字体大小-直接在style中写textsize属性
<style name="AppTheme" parent="AppBaseTheme"> <!-- All customizations that are NOT specific to a particular API-level can go here. --> <item name="android:textSize">10sp</item> </style>
3.DatePicker的整体大小调整-resizePikcer(datePicker);
/** * 调整FrameLayout大小 * * @param tp */ private void resizePikcer(FrameLayout tp) { List<NumberPicker> npList = findNumberPicker(tp); for (NumberPicker np : npList) { resizeNumberPicker(np); } }
/** * 得到viewGroup里面的numberpicker组件 * * @param viewGroup * @return */ private List<NumberPicker> findNumberPicker(ViewGroup viewGroup) { List<NumberPicker> npList = new ArrayList<NumberPicker>(); View child = null; if (null != viewGroup) { for (int i = 0; i < viewGroup.getChildCount(); i++) { child = viewGroup.getChildAt(i); if (child instanceof NumberPicker) { npList.add((NumberPicker) child); } else if (child instanceof LinearLayout) { List<NumberPicker> result = findNumberPicker((ViewGroup) child); if (result.size() > 0) { return result; } } } } return npList; }
/* * 调整大小 */ private void resizeNumberPicker(NumberPicker np) { LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(280, LinearLayout.LayoutParams.WRAP_CONTENT); params.setMargins(10, 0, 10, 0); np.setLayoutParams(params); }
NumPicker
NumPicker是一个数字选择器，下面通过两个NumPicker来实现时间选择器,并且修改分割线的颜色(主要实现了NumberPicker.Formatter和OnValueChangeListener接口)。
/* 更改分割线颜色 */ private void setNumberPickerDividerColor(NumberPicker numberPicker) { NumberPicker picker = numberPicker; Field[] pickerFields = NumberPicker.class.getDeclaredFields(); for (Field pf : pickerFields) { if (pf.getName().equals("mSelectionDivider")) { pf.setAccessible(true); try { //设置分割线的颜色值 透明 pf.set(picker, new ColorDrawable(this.getResources().getColor(android.R.color.holo_red_dark))); } catch (IllegalArgumentException e) { e.printStackTrace(); } catch (Resources.NotFoundException e) { e.printStackTrace(); } catch (IllegalAccessException e) { e.printStackTrace(); } break; } } }
@Override public String format(int value) { String tmpStr = String.valueOf(value); if (value < 10) { tmpStr = "0" + tmpStr; } return tmpStr; } private NumberPicker.OnValueChangeListener mOnHourChangedListener = new NumberPicker.OnValueChangeListener() { @Override public void onValueChange(NumberPicker picker, int oldVal, int newVal) { Log.e("时:", newVal + ""); } }; private NumberPicker.OnValueChangeListener mOnMinuteChangedListener = new NumberPicker.OnValueChangeListener() { @Override public void onValueChange(NumberPicker picker, int oldVal, int newVal) { Log.e("分:", newVal + ""); } };
/* 时间(hourpicker、minuteicker是NumberPicker） */ hourpicker.setFormatter(this); hourpicker.setOnValueChangedListener(mOnHourChangedListener); hourpicker.setMaxValue(24); hourpicker.setMinValue(0); hourpicker.setValue(0); minuteicker.setOnValueChangedListener(mOnMinuteChangedListener); minuteicker.setFormatter(this); minuteicker.setMaxValue(60); minuteicker.setMinValue(0); minuteicker.setValue(0);
源码下载地址：
http://download.csdn.net/download/qq_34908107/9906332