Android自定义控件实现按钮滚动选择效果
作者：switch(mind) 发布时间：2023-04-02 09:42:02
标签：Android,按钮,滚动选择
本文实例为大家分享了Android实现按钮滚动选择效果的具体代码，供大家参考，具体内容如下
效果图
代码实现
package com.demo.ui.view;
import android.annotation.TargetApi;
import android.content.Context;
import android.os.Build;
import android.os.Handler;
import android.support.v4.content.ContextCompat;
import android.view.Gravity;
import android.view.MotionEvent;
import android.view.View;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import android.widget.TextView;
import com.demo.R;
import com.demo.factory.Axis;
import com.demo.utils.LogUtils;
import java.util.ArrayList;
import java.util.List;
public class AirTemperatureView extends RelativeLayout{
private Context context;
private TextView tv;
private TextView tv_middle;
// private TextView tv_middle_small;
private RelativeLayout Auto_layout;
private StringScrollPicker stringScrollPicker;
private List<CharSequence> newList;
private ImageView img;
private ImageView img_left;
private ImageView img_right;
private int mPosition;
private Handler handler = new Handler();
/**
* 延迟线程，看是否还有下一个字符输入
*/
private Runnable delayRun = new Runnable() {
@Override
public void run() {
stringScrollPicker.setVisibility(INVISIBLE);
img.setBackgroundResource(R.drawable.air_temp_bg);
tv_middle.setText(newList.get(mPosition));
//tv.setText("电池剩余"+newList.get(mPosition)+"％提醒你");
tv_middle.setVisibility(VISIBLE);
img_right.setVisibility(VISIBLE);
img_left.setVisibility(VISIBLE);
if(mListener != null) {
mListener.setAirTemper(mPosition+18);
}
LogUtils.e("空调刷新===","温度");
}
};
public AirTemperatureView(Context context){
super(context);
this.context = context;
init();
}
@TargetApi(Build.VERSION_CODES.M)
public void init(){
super.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, Axis.scaleX(230)));
LinearLayout parent = new LinearLayout(context);
parent.setOrientation(LinearLayout.VERTICAL);
LayoutParams parent_Params = new LayoutParams(LayoutParams.MATCH_PARENT, Axis.scaleX(230));
super.addView(parent,parent_Params);
RelativeLayout tv_layout = new RelativeLayout(context);
LinearLayout.LayoutParams tv_layout_Params = new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, Axis.scaleX(50));
parent.addView(tv_layout,tv_layout_Params);
tv = new TextView(context);
tv.setText("温度");
tv.setTextSize(Axis.scaleTextSize(36));
tv.setTextColor(ContextCompat.getColor(context, R.color.white_70_color));//
LayoutParams tv_Params = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
tv_Params.addRule(RelativeLayout.CENTER_IN_PARENT);
tv_layout.addView(tv,tv_Params);
/**
* 滑动选择器
*/
Auto_layout = new RelativeLayout(context);
LinearLayout.LayoutParams Auto_layout_Params = new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, Axis.scaleX(150));
Auto_layout_Params.setMargins(0,Axis.scaleX(30),0,0);
parent.addView(Auto_layout,Auto_layout_Params);
img = new ImageView(context);
img.setId(R.id.EleRemindImage);
img.setBackgroundResource(R.drawable.air_temp_bg);
LayoutParams img_Params = new LayoutParams(Axis.scaleX(150), Axis.scaleX(150));
img_Params.addRule(RelativeLayout.CENTER_IN_PARENT);
Auto_layout.addView(img,img_Params);
img_left = new ImageView(context);
img_left.setBackgroundResource(R.drawable.battery_point);
LayoutParams img_left_Params = new LayoutParams(Axis.scaleX(14), Axis.scaleX(14));
img_left_Params.addRule(RelativeLayout.CENTER_VERTICAL);
img_left_Params.addRule(RelativeLayout.LEFT_OF,R.id.EleRemindImage);
img_left_Params.setMargins(0,0,Axis.scaleX(134),0);
Auto_layout.addView(img_left,img_left_Params);
img_right = new ImageView(context);
img_right.setBackgroundResource(R.drawable.battery_point);
LayoutParams img_right_Params = new LayoutParams(Axis.scaleX(14), Axis.scaleX(14));
img_right_Params.addRule(RelativeLayout.CENTER_VERTICAL);
img_right_Params.addRule(RelativeLayout.RIGHT_OF,R.id.EleRemindImage);
img_right_Params.setMargins(Axis.scaleX(134),0,0,0);
Auto_layout.addView(img_right,img_right_Params);
tv_middle = new TextView(context);
tv_middle.setTextSize(Axis.scaleTextSize(64));
tv_middle.setGravity(Gravity.CENTER);
tv_middle.setTextColor(0xFFFFFFFF);
LayoutParams tv_middle_Params = new LayoutParams(Axis.scaleX(150), Axis.scaleX(150));
tv_middle_Params.addRule(RelativeLayout.CENTER_IN_PARENT);
Auto_layout.addView(tv_middle,tv_middle_Params);
newList = new ArrayList<>();
newList.add("18");
newList.add("19");
newList.add("20");
newList.add("21");
newList.add("22");
newList.add("23");
newList.add("24");
newList.add("25");
newList.add("26");
newList.add("27");
newList.add("28");
newList.add("29");
newList.add("30");
newList.add("31");
newList.add("32");
tv_middle.setText(newList.get(0));
stringScrollPicker = new StringScrollPicker(context);
stringScrollPicker.setHorizontal(true);
stringScrollPicker.setVisibleItemCount(5);//可见5个 第3个 （3-1）个位中间
stringScrollPicker.setCenterPosition(2);
stringScrollPicker.setIsCirculation(true);
stringScrollPicker.setCanTap(true);
stringScrollPicker.setDisallowInterceptTouch(true);
LayoutParams stringScrollPicker_Params = new LayoutParams(LayoutParams.MATCH_PARENT,Axis.scaleX(150));
Auto_layout.addView(stringScrollPicker,stringScrollPicker_Params);
stringScrollPicker.setData(newList);
stringScrollPicker.setOnSelectedListener(new ScrollPickerView.OnSelectedListener() {
@Override
public void onSelected(ScrollPickerView scrollPickerView, final int position) {
mPosition = position;
handler.postDelayed(delayRun, 1500);
}
});
stringScrollPicker.setOnSelectedListener(new StringScrollPicker.OnDataSelectedListener() {
@Override
public void DataSelected(CharSequence data) {
//tv.setText("电池剩余"+data+"％提醒你");
}
});
stringScrollPicker.setSelectedPosition(0,false);//中间Item位置
stringScrollPicker.setVisibility(INVISIBLE);
stringScrollPicker.setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
switch (event.getAction()){
case MotionEvent.ACTION_DOWN:
img.setBackgroundResource(R.drawable.battery_btn_p);
if(delayRun!=null){
handler.removeCallbacks(delayRun);
}
break;
}
return false;
}
});
img.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
stringScrollPicker.setVisibility(VISIBLE);
tv_middle.setVisibility(INVISIBLE);
img_right.setVisibility(INVISIBLE);
img_left.setVisibility(INVISIBLE);
img.setBackgroundResource(R.drawable.battery_btn_p);
}
});
}
/**
* 风速设置
* @param mPosition
*/
public void setAirTemperature(int mPosition){
/**
* 在设置的时候不刷新
*/
if(stringScrollPicker.getVisibility() == INVISIBLE){
if(mPosition > 32){
mPosition = 32;
}
stringScrollPicker.setSelectedPosition(mPosition-18,false);
tv_middle.setText(newList.get(mPosition-18));
}
}
public TemperatureListener mListener;
public void setOnTemperatureListener (TemperatureListener listener) {
mListener = listener;
}
public interface TemperatureListener {
void setAirTemper(int temperature);
}
}
StringScrollPicker 类
package com.demo.ui.view;
import android.annotation.TargetApi;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.os.Build;
import android.support.annotation.RequiresApi;
import android.text.Layout;
import android.text.StaticLayout;
import android.text.TextPaint;
import android.util.AttributeSet;
import android.util.Log;
import com.demo.factory.Axis;
import com.demo.utils.ColorUtil;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
public class StringScrollPicker extends ScrollPickerView<CharSequence> {
private int mMeasureWidth;
private int mMeasureHeight;
private TextPaint mPaint; //
private int mMinTextSize = Axis.scaleX(64); // 最小的字体
private int mMaxTextSize = Axis.scaleX(64); // 最大的字体
// 字体渐变颜色
private int mStartColor = Color.WHITE; // 中间选中ｉｔｅｍ的颜色
private int mEndColor = Color.GRAY; // 上下两边的颜色
private int mMaxLineWidth = -1; // 最大的行宽,默认为itemWidth.超过后文字自动换行
private Layout.Alignment mAlignment = Layout.Alignment.ALIGN_CENTER; // 对齐方式,默认居中
@TargetApi(Build.VERSION_CODES.CUPCAKE)
public StringScrollPicker(Context context) {
this(context, null);
}
@RequiresApi(api = Build.VERSION_CODES.CUPCAKE)
public StringScrollPicker(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
@RequiresApi(api = Build.VERSION_CODES.CUPCAKE)
public StringScrollPicker(Context context, AttributeSet attrs,
int defStyleAttr) {
super(context, attrs, defStyleAttr);
mPaint = new TextPaint(Paint.ANTI_ALIAS_FLAG);
mPaint.setStyle(Paint.Style.FILL);
mPaint.setColor(Color.BLACK);
setData(new ArrayList<CharSequence>(Arrays.asList(new String[]{
"one", "two", "three", "four", "five", "six", "seven", "eight", "nine", "ten", "eleven", "twelve"
})));
}
/**
* @param startColor 正中间的颜色
* @param endColor 上下两边的颜色
*/
public void setColor(int startColor, int endColor) {
mStartColor = startColor;
mEndColor = endColor;
invalidate();
}
/**
* item文字大小
*
* @param minText 沒有被选中时的最小文字
* @param maxText 被选中时的最大文字
*/
public void setTextSize(int minText, int maxText) {
mMinTextSize = minText;
mMaxTextSize = maxText;
invalidate();
}
public int getStartColor() {
return mStartColor;
}
public int getEndColor() {
return mEndColor;
}
public int getMinTextSize() {
return mMinTextSize;
}
public int getMaxTextSize() {
return mMaxTextSize;
}
public int getMaxLineWidth() {
return mMaxLineWidth;
}
/**
* 最大的行宽,默认为itemWidth.超过后文字自动换行
* @param maxLineWidth
*/
public void setMaxLineWidth(int maxLineWidth) {
mMaxLineWidth = maxLineWidth;
}
/**
* 最大的行宽,默认为itemWidth.超过后文字自动换行
* @return
*/
public Layout.Alignment getAlignment() {
return mAlignment;
}
public void setAlignment(Layout.Alignment alignment) {
mAlignment = alignment;
}
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
mMeasureWidth = getMeasuredWidth();
mMeasureHeight = getMeasuredHeight();
if (mMaxLineWidth < 0) {
mMaxLineWidth = getItemWidth();
}
}
@Override
public void drawItem(Canvas canvas, List<CharSequence> data, int position, int relative, float moveLength, float top) {
CharSequence text = data.get(position);
int itemSize = getItemSize();
// 设置文字大小
if (relative == -1) { // 上一个
if (moveLength < 0) { // 向上滑动
mPaint.setTextSize(mMinTextSize);
} else { // 向下滑动
mPaint.setTextSize(mMinTextSize + (mMaxTextSize - mMinTextSize)
* moveLength / itemSize);
}
} else if (relative == 0) { // 中间item,当前选中
mPaint.setTextSize(mMinTextSize + (mMaxTextSize - mMinTextSize)
* (itemSize - Math.abs(moveLength)) / itemSize);
} else if (relative == 1) { // 下一个
if (moveLength > 0) { // 向下滑动
mPaint.setTextSize(mMinTextSize);
} else { // 向上滑动
mPaint.setTextSize(mMinTextSize + (mMaxTextSize - mMinTextSize)
* -moveLength / itemSize);
}
} else { // 其他
mPaint.setTextSize(mMinTextSize);
}
StaticLayout layout = new StaticLayout(text, 0, text.length(), mPaint, mMaxLineWidth, mAlignment, 1.0F, 0.0F, true, null, 0);
float x = 0;
float y = 0;
float lineWidth = layout.getWidth();
if (isHorizontal()) { // 水平滚动
x = top + (getItemWidth() - lineWidth) / 2;
y = (getItemHeight() - layout.getHeight()) / 2;
} else { // 垂直滚动
x = (getItemWidth() - lineWidth) / 2;
y = top + (getItemHeight() - layout.getHeight()) / 2;
}
// 计算渐变颜色
computeColor(relative, itemSize, moveLength,text);
// canvas.drawText(text, x, y, mPaint);
canvas.save();
canvas.translate(x, y);
layout.draw(canvas);
canvas.restore();
}
/**
* 计算字体颜色，渐变
*
* @param relative 相对中间item的位置
*/
private String lastString;
private String nowSring;
private void computeColor(int relative, int itemSize, float moveLength, CharSequence text) {
int color = mEndColor; // 其他默认为ｍEndColor
if (relative == -1 || relative == 1) { // 上一个或下一个
// 处理上一个item且向上滑动或者处理下一个item且向下滑动，颜色为mEndColor
if ((relative == -1 && moveLength < 0)
|| (relative == 1 && moveLength > 0)) {
color = mEndColor;
} else { // 计算渐变的颜色
float rate = (itemSize - Math.abs(moveLength))
/ itemSize;
color = ColorUtil.computeGradientColor(mStartColor, mEndColor, rate);
}
} else if (relative == 0) { // 中间item
float rate = Math.abs(moveLength) / itemSize;
color = ColorUtil.computeGradientColor(mStartColor, mEndColor, rate);
nowSring = text.toString();
if(nowSring != lastString){
Log.e("text=====",text+"");
if(mListener != null){
mListener.DataSelected(text);
}
}
lastString = nowSring;
}
mPaint.setColor(color);
}
public interface OnDataSelectedListener {
void DataSelected(CharSequence data);
}
public void setOnSelectedListener(OnDataSelectedListener listener) {
mListener = listener;
}
public OnDataSelectedListener mListener;
}
ScrollPickerView 类
package com.demo.ui.view;
import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.animation.ValueAnimator;
import android.annotation.TargetApi;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.drawable.ColorDrawable;
import android.graphics.drawable.Drawable;
import android.os.Build;
import android.support.annotation.RequiresApi;
import android.util.AttributeSet;
import android.util.DisplayMetrics;
import android.view.GestureDetector;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewParent;
import android.view.animation.Interpolator;
import android.widget.Scroller;
import com.demo.R;
import com.demo.utils.LogUtils;
import java.util.ArrayList;
import java.util.List;
/**
* 滚动选择器,带惯性滑动
*/
public abstract class ScrollPickerView<T> extends View {
private int mVisibleItemCount = 3; // 可见的item数量
private boolean mIsInertiaScroll = true; // 快速滑动时是否惯性滚动一段距离，默认开启
private boolean mIsCirculation = true; // 是否循环滚动，默认开启
/*
不允许父组件拦截触摸事件，设置为true为不允许拦截，此时该设置才生效
当嵌入到ScrollView等滚动组件中，为了使该自定义滚动选择器可以正常工作，请设置为true
*/
private boolean mDisallowInterceptTouch = false;
private int mSelected; // 当前选中的item下标
private int mLastSelected; // 当前选中的item下标
private List<T> mData;
private int mItemHeight = 0; // 每个条目的高度,当垂直滚动时，高度=mMeasureHeight／mVisibleItemCount
private int mItemWidth = 0; // 每个条目的宽度，当水平滚动时，宽度=mMeasureWidth／mVisibleItemCount
private int mItemSize; // 当垂直滚动时，mItemSize = mItemHeight;水平滚动时，mItemSize = mItemWidth
private int mCenterPosition = -1; // 中间item的位置，0<=mCenterPosition＜mVisibleItemCount，默认为 mVisibleItemCount / 2
private int mCenterY; // 中间item的起始坐标y(不考虑偏移),当垂直滚动时，y= mCenterPosition*mItemHeight
private int mCenterX; // 中间item的起始坐标x(不考虑偏移),当垂直滚动时，x = mCenterPosition*mItemWidth
private int mCenterPoint; // 当垂直滚动时，mCenterPoint = mCenterY;水平滚动时，mCenterPoint = mCenterX
private float mLastMoveY; // 触摸的坐标y
private float mLastMoveX; // 触摸的坐标X
private float mMoveLength = 0; // item移动长度，负数表示向上移动，正数表示向下移动
private GestureDetector mGestureDetector;
private OnSelectedListener mListener;
private Scroller mScroller;
private boolean mIsFling; // 是否正在惯性滑动
private boolean mIsMovingCenter; // 是否正在滑向中间
// 可以把scroller看做模拟的触屏滑动操作，mLastScrollY为上次触屏滑动的坐标
private int mLastScrollY = 0; // Scroller的坐标y
private int mLastScrollX = 0; // Scroller的坐标x
private boolean mDisallowTouch = false; // 不允许触摸
private Paint mPaint; //
private Drawable mCenterItemBackground = null; // 中间选中item的背景色
private boolean mCanTap = true; // 单击切换选项或触发点击 *
private boolean mIsHorizontal = false; // 是否水平滚动
private boolean mDrawAllItem = false; // 是否绘制每个item(包括在边界外的item)
@RequiresApi(api = Build.VERSION_CODES.CUPCAKE)
public ScrollPickerView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
@TargetApi(Build.VERSION_CODES.HONEYCOMB)
@RequiresApi(api = Build.VERSION_CODES.CUPCAKE)
public ScrollPickerView(Context context, AttributeSet attrs,
int defStyleAttr) {
super(context, attrs, defStyleAttr);
mGestureDetector = new GestureDetector(getContext(),
new FlingOnGestureListener());
mScroller = new Scroller(getContext());
mAutoScrollAnimator = ValueAnimator.ofInt(0, 0);
mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
mPaint.setStyle(Paint.Style.FILL);
init(attrs);
}
private void init(AttributeSet attrs) {
if (attrs != null) {
TypedArray typedArray = getContext().obtainStyledAttributes(attrs,
R.styleable.ScrollPickerView);
if (typedArray.hasValue(R.styleable.ScrollPickerView_spv_center_item_background)) {
setCenterItemBackground(typedArray.getDrawable(R.styleable.ScrollPickerView_spv_center_item_background));
}
setVisibleItemCount(typedArray.getInt(
R.styleable.ScrollPickerView_spv_visible_item_count,
getVisibleItemCount()));
setCenterPosition(typedArray.getInt(
R.styleable.ScrollPickerView_spv_center_item_position,
getCenterPosition()));
setIsCirculation(typedArray.getBoolean(R.styleable.ScrollPickerView_spv_is_circulation, isIsCirculation()));
setDisallowInterceptTouch(typedArray.getBoolean(R.styleable.ScrollPickerView_spv_disallow_intercept_touch, isDisallowInterceptTouch()));
setHorizontal(typedArray.getInt(R.styleable.ScrollPickerView_spv_orientation, mIsHorizontal ? 1 : 2) == 1);
typedArray.recycle();
}
}
@Override
protected void onDraw(Canvas canvas) {
if (mData == null || mData.size() <= 0) {
return;
}
// 选中item的背景色
if (mCenterItemBackground != null) {
mCenterItemBackground.draw(canvas);
}
// 只绘制可见的item
int length = Math.max(mCenterPosition + 1, mVisibleItemCount - mCenterPosition);
int position;
int start = Math.min(length, mData.size());
if (mDrawAllItem) {
start = mData.size();
}
// 上下两边
for (int i = start; i >= 1; i--) { // 先从远离中间位置的item绘制，当item内容偏大时，较近的item覆盖在较远的上面
if (mDrawAllItem || i <= mCenterPosition + 1) { // 上面的items,相对位置为 -i
position = mSelected - i < 0 ? mData.size() + mSelected - i
: mSelected - i;
// 传入位置信息，绘制item
if (mIsCirculation) {
drawItem(canvas, mData, position, -i, mMoveLength, mCenterPoint + mMoveLength - i * mItemSize);
} else if (mSelected - i >= 0) { // 非循环滚动
drawItem(canvas, mData, position, -i, mMoveLength, mCenterPoint + mMoveLength - i * mItemSize);
}
}
if (mDrawAllItem || i <= mVisibleItemCount - mCenterPosition) { // 下面的items,相对位置为 i
position = mSelected + i >= mData.size() ? mSelected + i
- mData.size() : mSelected + i;
// 传入位置信息，绘制item
if (mIsCirculation) {
drawItem(canvas, mData, position, i, mMoveLength, mCenterPoint + mMoveLength + i * mItemSize);
} else if (mSelected + i < mData.size()) { // 非循环滚动
drawItem(canvas, mData, position, i, mMoveLength, mCenterPoint + mMoveLength + i * mItemSize);
}
}
}
// 选中的item
drawItem(canvas, mData, mSelected, 0, mMoveLength, mCenterPoint + mMoveLength);
}
/**
* 绘制item
*
* @param canvas
* @param data 数据集
* @param position 在data数据集中的位置
* @param relative 相对中间item的位置,relative==0表示中间item,relative<0表示上（左）边的item,relative>0表示下(右)边的item
* @param moveLength 中间item滚动的距离，moveLength<0则表示向上（右）滚动的距离，moveLength＞0则表示向下（左）滚动的距离
* @param top 当前绘制item的坐标,当垂直滚动时为顶部y的坐标；当水平滚动时为item最左边x的坐标
*/
public abstract void drawItem(Canvas canvas, List<T> data, int position, int relative, float moveLength, float top);
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
reset();
}
private void reset() {
if (mCenterPosition < 0) {
mCenterPosition = mVisibleItemCount / 2;
}
if (mIsHorizontal) {
mItemHeight = getMeasuredHeight();
mItemWidth = getMeasuredWidth() / mVisibleItemCount;
mCenterY = 0;
mCenterX = mCenterPosition * mItemWidth;
mItemSize = mItemWidth;
mCenterPoint = mCenterX;
} else {
mItemHeight = getMeasuredHeight() / mVisibleItemCount;
mItemWidth = getMeasuredWidth();
mCenterY = mCenterPosition * mItemHeight;
mCenterX = 0;
mItemSize = mItemHeight;
mCenterPoint = mCenterY;
}
if (mCenterItemBackground != null) {
mCenterItemBackground.setBounds(mCenterX, mCenterY, mCenterX + mItemWidth, mCenterY + mItemHeight);
}
}
@RequiresApi(api = Build.VERSION_CODES.FROYO)
@Override
public boolean onTouchEvent(MotionEvent event) {
if (mDisallowTouch) { // 不允许触摸
return true;
}
if (mGestureDetector.onTouchEvent(event)) {
return true;
}
switch (event.getActionMasked()) {
case MotionEvent.ACTION_MOVE:
if (mIsHorizontal) {
if (Math.abs(event.getX() - mLastMoveX) < 0.1f) {
return true;
}
mMoveLength += event.getX() - mLastMoveX;
} else {
if (Math.abs(event.getY() - mLastMoveY) < 0.1f) {
return true;
}
mMoveLength += event.getY() - mLastMoveY;
}
mLastMoveY = event.getY();
mLastMoveX = event.getX();
checkCirculation();
invalidate();
break;
case MotionEvent.ACTION_UP:
mLastMoveY = event.getY();
mLastMoveX = event.getX();
moveToCenter();
break;
}
return true;
}
/**
* @param curr
* @param end
*/
private void computeScroll(int curr, int end, float rate) {
if (rate < 1) { // 正在滚动
if (mIsHorizontal) {
// 可以把scroller看做模拟的触屏滑动操作，mLastScrollX为上次滑动的坐标
mMoveLength = mMoveLength + curr - mLastScrollX;
mLastScrollX = curr;
} else {
// 可以把scroller看做模拟的触屏滑动操作，mLastScrollY为上次滑动的坐标
mMoveLength = mMoveLength + curr - mLastScrollY;
mLastScrollY = curr;
}
checkCirculation();
invalidate();
} else { // 滚动完毕
mIsMovingCenter = false;
mLastScrollY = 0;
mLastScrollX = 0;
// 直接居中，不通过动画
if (mMoveLength > 0) { //// 向下滑动
if (mMoveLength < mItemSize / 2) {
mMoveLength = 0;
} else {
mMoveLength = mItemSize;
}
} else {
if (-mMoveLength < mItemSize / 2) {
mMoveLength = 0;
} else {
mMoveLength = -mItemSize;
}
}
checkCirculation();
mMoveLength = 0;
mLastScrollY = 0;
mLastScrollX = 0;
notifySelected(true);
invalidate();
}
}
@Override
public void computeScroll() {
if (mScroller.computeScrollOffset()) { // 正在滚动
if (mIsHorizontal) {
// 可以把scroller看做模拟的触屏滑动操作，mLastScrollX为上次滑动的坐标
mMoveLength = mMoveLength + mScroller.getCurrX() - mLastScrollX;
} else {
// 可以把scroller看做模拟的触屏滑动操作，mLastScrollY为上次滑动的坐标
mMoveLength = mMoveLength + mScroller.getCurrY() - mLastScrollY;
}
mLastScrollY = mScroller.getCurrY();
mLastScrollX = mScroller.getCurrX();
checkCirculation(); //检测当前选中的item
invalidate();
} else { // 滚动完毕
if (mIsFling) {
mIsFling = false;
moveToCenter(); // 滚动到中间位置
} else if (mIsMovingCenter) { // 选择完成，回调给 *
mMoveLength = 0;
mIsMovingCenter = false;
mLastScrollY = 0;
mLastScrollX = 0;
notifySelected(true);
}
}
}
public void cancelScroll() {
mLastScrollY = 0;
mLastScrollX = 0;
mIsFling = mIsMovingCenter = false;
mScroller.abortAnimation();
stopAutoScroll();
}
// 检测当前选择的item位置
private void checkCirculation() {
if (mMoveLength >= mItemSize) { // 向下滑动
// 该次滚动距离中越过的item数量
int span = (int) (mMoveLength / mItemSize);
mSelected -= span;
if (mSelected < 0) { // 滚动顶部，判断是否循环滚动
if (mIsCirculation) {
do {
mSelected = mData.size() + mSelected;
} while (mSelected < 0); // 当越过的item数量超过一圈时
mMoveLength = (mMoveLength - mItemSize) ％ mItemSize;
} else { // 非循环滚动
mSelected = 0;
mMoveLength = mItemSize;
if (mIsFling) { // 停止惯性滑动，根据computeScroll()中的逻辑，下一步将调用moveToCenter()
mScroller.forceFinished(true);
}
if (mIsMovingCenter) { // 移回中间位置
scroll(mMoveLength, 0);
}
}
} else {
mMoveLength = (mMoveLength - mItemSize) ％ mItemSize;
}
} else if (mMoveLength <= -mItemSize) { // 向上滑动
// 该次滚动距离中越过的item数量
int span = (int) (-mMoveLength / mItemSize);
mSelected += span;
if (mSelected >= mData.size()) { // 滚动末尾，判断是否循环滚动
if (mIsCirculation) {
do {
mSelected = mSelected - mData.size();
} while (mSelected >= mData.size()); // 当越过的item数量超过一圈时
mMoveLength = (mMoveLength + mItemSize) ％ mItemSize;
} else { // 非循环滚动
mSelected = mData.size() - 1;
mMoveLength = -mItemSize;
if (mIsFling) { // 停止惯性滑动，根据computeScroll()中的逻辑，下一步将调用moveToCenter()
mScroller.forceFinished(true);
}
if (mIsMovingCenter) { // 移回中间位置
scroll(mMoveLength, 0);
}
}
} else {
mMoveLength = (mMoveLength + mItemSize) ％ mItemSize;
}
}
}
// 移动到中间位置
private void moveToCenter() {
if (!mScroller.isFinished() || mIsFling || mMoveLength == 0) {
return;
}
cancelScroll();
// 向下滑动
if (mMoveLength > 0) {
if (mIsHorizontal) {
if (mMoveLength < mItemWidth / 2) {
scroll(mMoveLength, 0);
} else {
scroll(mMoveLength, mItemWidth);
}
} else {
if (mMoveLength < mItemHeight / 2) {
scroll(mMoveLength, 0);
} else {
scroll(mMoveLength, mItemHeight);
}
}
} else {
if (mIsHorizontal) {
if (-mMoveLength < mItemWidth / 2) {
scroll(mMoveLength, 0);
} else {
scroll(mMoveLength, -mItemWidth);
}
} else {
if (-mMoveLength < mItemHeight / 2) {
scroll(mMoveLength, 0);
} else {
scroll(mMoveLength, -mItemHeight);
}
}
}
}
// 平滑滚动
private void scroll(float from, int to) {
if (mIsHorizontal) {
mLastScrollX = (int) from;
mIsMovingCenter = true;
mScroller.startScroll((int) from, 0, 0, 0);
mScroller.setFinalX(to);
} else {
mLastScrollY = (int) from;
mIsMovingCenter = true;
mScroller.startScroll(0, (int) from, 0, 0);
mScroller.setFinalY(to);
}
invalidate();
}
// 惯性滑动，
private void fling(float from, float vel) {
if (mIsHorizontal) {
mLastScrollX = (int) from;
mIsFling = true;
// 最多可以惯性滑动10个item
mScroller.fling((int) from, 0, (int) vel, 0, -10 * mItemWidth,
10 * mItemWidth, 0, 0);
} else {
mLastScrollY = (int) from;
mIsFling = true;
// 最多可以惯性滑动10个item
mScroller.fling(0, (int) from, 0, (int) vel, 0, 0, -10 * mItemHeight,
10 * mItemHeight);
}
invalidate();
}
private void notifySelected(final boolean trigger) {
if (mListener != null) {
// 告诉 * 选择完毕
post(new Runnable() {
@Override
public void run() {
if(mLastSelected != mSelected){
if(trigger){
mListener.onSelected(ScrollPickerView.this, mSelected);
}
}
mLastSelected = mSelected;
}
});
}
}
private boolean mIsAutoScrolling = false;
private ValueAnimator mAutoScrollAnimator;
private final static SlotInterpolator sAutoScrollInterpolator = new SlotInterpolator();
/**
* 自动滚动(必须设置为可循环滚动)
*
* @param position
* @param duration
* @param speed 每毫秒移动的像素点
*/
@RequiresApi(api = Build.VERSION_CODES.HONEYCOMB)
public void autoScrollFast(final int position, long duration, float speed, final Interpolator interpolator) {
if (mIsAutoScrolling || !mIsCirculation) {
return;
}
cancelScroll();
mIsAutoScrolling = true;
int length = (int) (speed * duration);
int circle = (int) (length * 1f / (mData.size() * mItemSize) + 0.5f); // 圈数
circle = circle <= 0 ? 1 : circle;
int aPlan = circle * (mData.size()) * mItemSize + (mSelected - position) * mItemSize;
int bPlan = aPlan + (mData.size()) * mItemSize; // 多一圈
// 让其尽量接近length
final int end = Math.abs(length - aPlan) < Math.abs(length - bPlan) ? aPlan : bPlan;
mAutoScrollAnimator.cancel();
mAutoScrollAnimator.setIntValues(0, end);
mAutoScrollAnimator.setInterpolator(interpolator);
mAutoScrollAnimator.setDuration(duration);
mAutoScrollAnimator.removeAllUpdateListeners();
if (end != 0) { // itemHeight为0导致endy=0
mAutoScrollAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator animation) {
float rate = 0;
rate = animation.getCurrentPlayTime() * 1f / animation.getDuration();
computeScroll((int) animation.getAnimatedValue(), end, rate);
}
});
mAutoScrollAnimator.removeAllListeners();
mAutoScrollAnimator.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
super.onAnimationEnd(animation);
mIsAutoScrolling = false;
}
});
mAutoScrollAnimator.start();
} else {
computeScroll(end, end, 1);
mIsAutoScrolling = false;
}
}
/**
* 自动滚动，默认速度为 0.6dp/ms
*
* @see ScrollPickerView#autoScrollFast(int, long, float, Interpolator)
*/
@RequiresApi(api = Build.VERSION_CODES.HONEYCOMB)
public void autoScrollFast(final int position, long duration) {
float speed = dip2px(0.6f);
autoScrollFast(position, duration, speed, sAutoScrollInterpolator);
}
/**
* 自动滚动
*
* @see ScrollPickerView#autoScrollFast(int, long, float, Interpolator)
*/
@RequiresApi(api = Build.VERSION_CODES.HONEYCOMB)
public void autoScrollFast(final int position, long duration, float speed) {
autoScrollFast(position, duration, speed, sAutoScrollInterpolator);
}
/**
* 滚动到指定位置
*
* @param toPosition 需要滚动到的位置
* @param duration 滚动时间
* @param interpolator
*/
@RequiresApi(api = Build.VERSION_CODES.HONEYCOMB)
public void autoScrollToPosition(int toPosition, long duration, final Interpolator interpolator) {
toPosition = toPosition ％ mData.size();
final int endY = (mSelected - toPosition) * mItemHeight;
autoScrollTo(endY, duration, interpolator, false);
}
/**
* @param endY 需要滚动到的位置
* @param duration 滚动时间
* @param interpolator
* @param canIntercept 能否终止滚动，比如触摸屏幕终止滚动
*/
@RequiresApi(api = Build.VERSION_CODES.HONEYCOMB)
public void autoScrollTo(final int endY, long duration, final Interpolator interpolator, boolean canIntercept) {
if (mIsAutoScrolling) {
return;
}
final boolean temp = mDisallowTouch;
mDisallowTouch = !canIntercept;
mIsAutoScrolling = true;
mAutoScrollAnimator.cancel();
mAutoScrollAnimator.setIntValues(0, endY);
mAutoScrollAnimator.setInterpolator(interpolator);
mAutoScrollAnimator.setDuration(duration);
mAutoScrollAnimator.removeAllUpdateListeners();
mAutoScrollAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator animation) {
float rate = 0;
rate = animation.getCurrentPlayTime() * 1f / animation.getDuration();
computeScroll((int) animation.getAnimatedValue(), endY, rate);
}
});
mAutoScrollAnimator.removeAllListeners();
mAutoScrollAnimator.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
super.onAnimationEnd(animation);
mIsAutoScrolling = false;
mDisallowTouch = temp;
}
});
mAutoScrollAnimator.start();
}
/**
* 停止自动滚动
*/
@TargetApi(Build.VERSION_CODES.HONEYCOMB)
public void stopAutoScroll() {
mIsAutoScrolling = false;
mAutoScrollAnimator.cancel();
}
private static class SlotInterpolator implements Interpolator {
@Override
public float getInterpolation(float input) {
return (float) (Math.cos((input + 1) * Math.PI) / 2.0f) + 0.5f;
}
}
/**
* 快速滑动时，惯性滑动一段距离
*
* @author huangziwei
*/
private class FlingOnGestureListener extends GestureDetector.SimpleOnGestureListener {
private boolean mIsScrollingLastTime = false;
public boolean onDown(MotionEvent e) {
if (mDisallowInterceptTouch) { // 不允许父组件拦截事件
ViewParent parent = getParent();
if (parent != null) {
parent.requestDisallowInterceptTouchEvent(true);
}
}
mIsScrollingLastTime = isScrolling(); // 记录是否从滚动状态终止
// 点击时取消所有滚动效果
cancelScroll();
mLastMoveY = e.getY();
mLastMoveX = e.getX();
return true;
}
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
final float velocityY) {
// 惯性滑动
if (mIsInertiaScroll) {
cancelScroll();
if (mIsHorizontal) {
fling(mMoveLength, velocityX);
} else {
fling(mMoveLength, velocityY);
}
}
return true;
}
@RequiresApi(api = Build.VERSION_CODES.HONEYCOMB)
@Override
public boolean onSingleTapUp(MotionEvent e) {
mLastMoveY = e.getY();
mLastMoveX = e.getX();
float lastMove = 0;
if (isHorizontal()) {
mCenterPoint = mCenterX;
lastMove = mLastMoveX;
LogUtils.e("lastMove===",lastMove+"");
LogUtils.e("mCenterPoint===",mCenterPoint+"");
} else {
mCenterPoint = mCenterY;
lastMove = mLastMoveY;
}
if (mCanTap && !isScrolling() && !mIsScrollingLastTime) {
if (lastMove >= mCenterPoint && lastMove <= mCenterPoint + mItemSize) {
//performClick();
} else if (lastMove < mCenterPoint) {
int bs = (int)((mCenterPoint+mItemSize) - lastMove)/mItemSize;
int move = bs*mItemSize;
autoScrollTo(move, 150, sAutoScrollInterpolator, false);
} else if (lastMove > mCenterPoint + mItemSize) {
int bs = (int)((lastMove -mCenterPoint)/mItemWidth);
int move = -bs*mItemSize;
autoScrollTo(move, 150, sAutoScrollInterpolator, false);
} else {
moveToCenter();
}
} else {
moveToCenter();
}
return true;
}
}
public List<T> getData() {
return mData;
}
public void setData(List<T> data) {
if (data == null) {
mData = new ArrayList<T>();
} else {
this.mData = data;
}
mSelected = mData.size() / 2;
invalidate();
}
public T getSelectedItem() {
return mData.get(mSelected);
}
public int getSelectedPosition() {
return mSelected;
}
public void setSelectedPosition(int position,boolean trigger) {
if (position < 0 || position > mData.size() - 1
|| position == mSelected) {
return;
}
mSelected = position;
invalidate();
if (mListener != null) {
notifySelected(trigger);
}
}
public void setOnSelectedListener(OnSelectedListener listener) {
mListener = listener;
}
public OnSelectedListener getListener() {
return mListener;
}
public boolean isInertiaScroll() {
return mIsInertiaScroll;
}
public void setInertiaScroll(boolean inertiaScroll) {
this.mIsInertiaScroll = inertiaScroll;
}
public boolean isIsCirculation() {
return mIsCirculation;
}
public void setIsCirculation(boolean isCirculation) {
this.mIsCirculation = false;
}
public boolean isDisallowInterceptTouch() {
return mDisallowInterceptTouch;
}
public int getVisibleItemCount() {
return mVisibleItemCount;
}
public void setVisibleItemCount(int visibleItemCount) {
mVisibleItemCount = visibleItemCount;
reset();
invalidate();
}
/**
* 是否允许父元素拦截事件，设置true后可以保证在ScrollView下正常滚动
*/
public void setDisallowInterceptTouch(boolean disallowInterceptTouch) {
mDisallowInterceptTouch = disallowInterceptTouch;
}
public int getItemHeight() {
return mItemHeight;
}
public int getItemWidth() {
return mItemWidth;
}
/**
* @return 当垂直滚动时，mItemSize = mItemHeight;水平滚动时，mItemSize = mItemWidth
*/
public int getItemSize() {
return mItemSize;
}
/**
* @return 中间item的起始坐标x(不考虑偏移), 当垂直滚动时，x = mCenterPosition*mItemWidth
*/
public int getCenterX() {
return mCenterX;
}
/**
* @return 中间item的起始坐标y(不考虑偏移), 当垂直滚动时，y= mCenterPosition*mItemHeight
*/
public int getCenterY() {
return mCenterY;
}
/**
* @return 当垂直滚动时，mCenterPoint = mCenterY;水平滚动时，mCenterPoint = mCenterX
*/
public int getCenterPoint() {
return mCenterPoint;
}
public boolean isDisallowTouch() {
return mDisallowTouch;
}
/**
* 设置是否允许手动触摸滚动
*
* @param disallowTouch
*/
public void setDisallowTouch(boolean disallowTouch) {
mDisallowTouch = disallowTouch;
}
/**
* 中间item的位置，0 <= centerPosition <= mVisibleItemCount
*
* @param centerPosition
*/
public void setCenterPosition(int centerPosition) {
if (centerPosition < 0) {
mCenterPosition = 0;
} else if (centerPosition >= mVisibleItemCount) {
mCenterPosition = mVisibleItemCount - 1;
} else {
mCenterPosition = centerPosition;
}
mCenterY = mCenterPosition * mItemHeight;
invalidate();
}
/**
* 中间item的位置,默认为 mVisibleItemCount / 2
*
* @return
*/
public int getCenterPosition() {
return mCenterPosition;
}
public void setCenterItemBackground(Drawable centerItemBackground) {
mCenterItemBackground = centerItemBackground;
mCenterItemBackground.setBounds(mCenterX, mCenterY, mCenterX + mItemWidth, mCenterY + mItemHeight);
invalidate();
}
public void setCenterItemBackground(int centerItemBackgroundColor) {
mCenterItemBackground = new ColorDrawable(centerItemBackgroundColor);
mCenterItemBackground.setBounds(mCenterX, mCenterY, mCenterX + mItemWidth, mCenterY + mItemHeight);
invalidate();
}
public Drawable getCenterItemBackground() {
return mCenterItemBackground;
}
public boolean isScrolling() {
return mIsFling || mIsMovingCenter || mIsAutoScrolling;
}
public boolean isFling() {
return mIsFling;
}
public boolean isMovingCenter() {
return mIsMovingCenter;
}
public boolean isAutoScrolling() {
return mIsAutoScrolling;
}
public boolean isCanTap() {
return mCanTap;
}
/**
* 设置 单击切换选项或触发点击 *
*
* @param canTap
*/
public void setCanTap(boolean canTap) {
mCanTap = canTap;
}
public boolean isHorizontal() {
return mIsHorizontal;
}
public boolean isVertical() {
return !mIsHorizontal;
}
public void setHorizontal(boolean horizontal) {
if (mIsHorizontal == horizontal) {
return;
}
mIsHorizontal = horizontal;
reset();
if (mIsHorizontal) {
mItemSize = mItemWidth;
} else {
mItemSize = mItemHeight;
}
invalidate();
}
public void setVertical(boolean vertical) {
if (mIsHorizontal == !vertical) {
return;
}
mIsHorizontal = !vertical;
reset();
if (mIsHorizontal) {
mItemSize = mItemWidth;
} else {
mItemSize = mItemHeight;
}
invalidate();
}
public boolean isDrawAllItem() {
return mDrawAllItem;
}
public void setDrawAllItem(boolean drawAllItem) {
mDrawAllItem = drawAllItem;
}
/**
* @author huangziwei
*/
public interface OnSelectedListener {
void onSelected(ScrollPickerView scrollPickerView, int position);
}
public int dip2px(float dipVlue) {
DisplayMetrics metrics = getContext().getResources().getDisplayMetrics();
float sDensity = metrics.density;
return (int) (dipVlue * sDensity + 0.5F);
}
@Override
public void setVisibility(int visibility) {
super.setVisibility(visibility);
if (visibility == VISIBLE) {
moveToCenter();
}
}
}
ColorUtil 类
package com.demo.utils;
import android.graphics.Color;
/**
* 颜色工具栏
*/
public class ColorUtil {
/**
* 计算渐变后的颜色
*
* @param startColor 开始颜色
* @param endColor 结束颜色
* @param rate 渐变率（0,1）
* @return 渐变后的颜色，当rate=0时，返回startColor，当rate=1时返回endColor
*/
public static int computeGradientColor(int startColor, int endColor, float rate) {
if (rate < 0) {
rate = 0;
}
if (rate > 1) {
rate = 1;
}
int alpha = Color.alpha(endColor) - Color.alpha(startColor);
int red = Color.red(endColor) - Color.red(startColor);
int green = Color.green(endColor) - Color.green(startColor);
int blue = Color.blue(endColor) - Color.blue(startColor);
return Color.argb(
Math.round(Color.alpha(startColor) + alpha * rate),
Math.round(Color.red(startColor) + red * rate),
Math.round(Color.green(startColor) + green * rate),
Math.round(Color.blue(startColor) + blue * rate));
}
}
调用
/**
* 温度
*/
airTemperatureView = new AirTemperatureView(context);
LinearLayout.LayoutParams airTemperatureView_Params = new LinearLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT,Axis.scaleX(230));
airTemperatureView_Params.setMargins(0,Axis.scaleX(100),0,0);
bodyLayout.addView(airTemperatureView,airTemperatureView_Params);//父布局 addView()
airTemperatureView.setOnTemperatureListener(new AirTemperatureView.TemperatureListener() {
@Override
public void setAirTemper(int temperature) {
LogUtils.e("空调温度===",temperature+"");
setTemperature(temperature);//网络请求方法
}
});
来源：https://blog.csdn.net/cswhale/article/details/79079371
0
投稿猜你喜欢
- java向文件中追加内容与读写文件内容源码实例代码向文件尾加入内容有多种方法，常见的方法有两种：RandomAccessFile类可以实现随
概述关于 static 关键字的使用，它可以用来修饰的成员变量和成员方法，被修饰的成员是属于类的，而不是单单是属 于某个对象的。也就是说，既- 本文实例讲述了Android结束进程的方法。分享给大家供大家参考，具体如下：最近在做一个类似与任务管理器的东西，里面有个功能，可以通过这个管
- SpringBoot小白创建项目，扫描不到Controller一系列问题1.2.3.4.5.6.还有一种办法是在启动服务类的入门，添加@Co
- 有些SIM卡在出厂时并没有预置VoiceMail number，但运营商又要求能够根据PLMN去自适应的从手机中读取到预设的VM numbe
- 介绍：％是求余运算符，也叫模除运算符，用于求余数。％要求两个操作数均为整数（或可以隐式转换成整数的类型）。标准规定：如果％左边的操作数为负数
- Java核心代码：public String getSmsInPhone() { final String SMS_URI_ALL = &q
- 最近在做一个项，有一个收藏的功能。后来看到了一点资讯的收藏动画，感觉不错，所有自己就实现了一下。这是效果：附上完整的代码，其中Animati
- 在实际项目中，Java有时候需要调用C写出来的东西，除了JNI以外，我认为一种比较好的方法是JAVA调用Shell。先把C写出来的make成
- 一、常规形式1 项目结构2 配置文件及环境设置（1）配置文件# 应用服务 WEB 访问端口server.port=8080# spring
- 😎 先看效果一人分饰多角（bushi）😏 后端代码🍗 先引入websocket依赖<!-- websocket消息推送 -->&
- Oracle的jdbc驱动三种主要分类：1、JDBC OCI： oci是oracle call interface的缩写，此驱动类似于传统的
- 什么是WebSocket?WebSocket协议是基于TCP的一种新的网络协议。它实现了浏览器与服务器全双工(full-duplex)通信—
- 这篇文章主要介绍了Java解析json报文实例解析,文中通过示例代码介绍的非常详细，对大家的学习或者工作具有一定的参考学习价值,需要的朋友可
- 1.申请测试号，并记录appID和appsecret2.关注测试号3.添加消息模板{{topic.DATA}} 用户名： {{user.DA
- 具体代码如下所示：package com.example.studyapplication.fragment;import android.
- 介绍Objects Comparer是用于对象比较的工具，c#常见的数据结构都是可以用这个三方库进行对比，比较复杂的对象也是可以比较的。简而
- 本文实例为大家分享了java仿windows记事本小程序的具体代码，供大家参考，具体内容如下import java.awt.Checkbox
- Android 中在有序广播中添加自定义权限的实例前言;有序广播说明：有序广播因为要处理消息的处理结果，所以要复杂一些。 * sendOrd
- 查看公司项目代码时，存在这样一个问题：winform界面上有很多信息填写，提交
