android NumberPicker修改选中内容的颜色等

/* * Copyright (C) 2008 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package net.simonvt.numberpicker.view; import java.text.DecimalFormatSymbols; import java.util.ArrayList; import java.util.Collections; import java.util.List; import java.util.Locale; import net.simonvt.numberpicker.R; import android.content.Context; import android.content.res.TypedArray; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.Paint.Align; import android.graphics.Rect; import android.graphics.drawable.Drawable; import android.os.Build; import android.os.Bundle; import android.text.InputType; import android.text.Spanned; import android.text.TextUtils; import android.text.method.NumberKeyListener; import android.util.AttributeSet; import android.util.SparseArray; import android.util.TypedValue; import android.view.KeyEvent; import android.view.LayoutInflater; import android.view.LayoutInflater.Filter; import android.view.MotionEvent; import android.view.VelocityTracker; import android.view.View; import android.view.ViewConfiguration; import android.view.accessibility.AccessibilityEvent; import android.view.accessibility.AccessibilityManager; import android.view.accessibility.AccessibilityNodeInfo; import android.view.accessibility.AccessibilityNodeProvider; import android.view.animation.DecelerateInterpolator; import android.view.inputmethod.EditorInfo; import android.view.inputmethod.InputMethodManager; import android.widget.Button; import android.widget.EditText; import android.widget.ImageButton; import android.widget.LinearLayout; import android.widget.TextView; //import android.annotation.Widget; /** * A widget that enables the user to select a number form a predefined range. * There are two flavors of this widget and which one is presented to the user * depends on the current theme. * <ul> * <li> * If the current theme is derived from {@link android.R.style#Theme} the widget * presents the current value as an editable input field with an increment button * above and a decrement button below. Long pressing the buttons allows for a quick * change of the current value. Tapping on the input field allows to type in * a desired value. * </li> * <li> * If the current theme is derived from {@link android.R.style#Theme_Holo} or * {@link android.R.style#Theme_Holo_Light} the widget presents the current * value as an editable input field with a lesser value above and a greater * value below. Tapping on the lesser or greater value selects it by animating * the number axis up or down to make the chosen value current. Flinging up * or down allows for multiple increments or decrements of the current value. * Long pressing on the lesser and greater values also allows for a quick change * of the current value. Tapping on the current value allows to type in a * desired value. * </li> * </ul> * <p> * For an example of using this widget, see {@link android.widget.TimePicker}. * </p> */ //@Widget public class NumberPicker extends LinearLayout { /** * The number of items show in the selector wheel. */ private static final int SELECTOR_WHEEL_ITEM_COUNT = 3; /** * The default update interval during long press. */ private static final long DEFAULT_LONG_PRESS_UPDATE_INTERVAL = 300; /** * The index of the middle selector item. */ private static final int SELECTOR_MIDDLE_ITEM_INDEX = SELECTOR_WHEEL_ITEM_COUNT / 2; /** * The coefficient by which to adjust (divide) the max fling velocity. */ private static final int SELECTOR_MAX_FLING_VELOCITY_ADJUSTMENT = 8; /** * The the duration for adjusting the selector wheel. */ private static final int SELECTOR_ADJUSTMENT_DURATION_MILLIS = 800; /** * The duration of scrolling while snapping to a given position. */ private static final int SNAP_SCROLL_DURATION = 300; /** * The strength of fading in the top and bottom while drawing the selector. */ private static final float TOP_AND_BOTTOM_FADING_EDGE_STRENGTH = 0.9f; /** * The default unscaled height of the selection divider. */ private static final int UNSCALED_DEFAULT_SELECTION_DIVIDER_HEIGHT = 2; /** * The default unscaled distance between the selection dividers. */ private static final int UNSCALED_DEFAULT_SELECTION_DIVIDERS_DISTANCE = 48; /** * The resource id for the default layout. */ private static final int DEFAULT_LAYOUT_RESOURCE_ID = 0; /** * Constant for unspecified size. */ private static final int SIZE_UNSPECIFIED = -1; /** * Use a custom NumberPicker formatting callback to use two-digit minutes * strings like "01". Keeping a static formatter etc. is the most efficient * way to do this; it avoids creating temporary objects on every call to * format(). */ private static class TwoDigitFormatter implements NumberPicker.Formatter { final StringBuilder mBuilder = new StringBuilder(); char mZeroDigit; java.util.Formatter mFmt; final Object[] mArgs = new Object[1]; TwoDigitFormatter() { final Locale locale = Locale.getDefault(); init(locale); } private void init(Locale locale) { mFmt = createFormatter(locale); mZeroDigit = getZeroDigit(locale); } public String format(int value) { final Locale currentLocale = Locale.getDefault(); if (mZeroDigit != getZeroDigit(currentLocale)) { init(currentLocale); } mArgs[0] = value; mBuilder.delete(0, mBuilder.length()); mFmt.format("%02d", mArgs); return mFmt.toString(); } private static char getZeroDigit(Locale locale) { // return LocaleData.get(locale).zeroDigit; return new DecimalFormatSymbols(locale).getZeroDigit(); } private java.util.Formatter createFormatter(Locale locale) { return new java.util.Formatter(mBuilder, locale); } } private static final TwoDigitFormatter sTwoDigitFormatter = new TwoDigitFormatter(); /** * @hide */ public static final Formatter getTwoDigitFormatter() { return sTwoDigitFormatter; } /** * The increment button. */ private final ImageButton mIncrementButton; /** * The decrement button. */ private final ImageButton mDecrementButton; /** * The text for showing the current value. */ private final EditText mInputText; /** * The distance between the two selection dividers. */ private final int mSelectionDividersDistance; /** * The min height of this widget. */ private final int mMinHeight; /** * The max height of this widget. */ private final int mMaxHeight; /** * The max width of this widget. */ private final int mMinWidth; /** * The max width of this widget. */ private int mMaxWidth; /** * Flag whether to compute the max width. */ private final boolean mComputeMaxWidth; /** * The height of the text. */ private final int mTextSize; /** * The height of the gap between text elements if the selector wheel. */ private int mS