通过自定义view实现仿iOS实现滑动两端的点选择时间的效果
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效果图
自定义的view代码
public class Ring_Slide2 extends View {
private static final double RADIAN = 180 / Math.PI;
private int max_progress; // 设置最大进度
private int cur_progress; //设置锚点1当前进度
private int cur_progress2; //设置锚点2进度
private int bottom_color;//设置底色
private int circle_color; //设置圆的颜色（锚点）
private int slide_color; //设置滑动过的颜色
private float ring_width; //圆环的宽度
private double cur_Angle; //当前锚点1旋转角度
private double cur_Angle2; //当前锚点2的旋转角度
private float ring_Radius;//圆环的半径
private final int[] arrColorCircle = new int[]{0xFFFFde37, 0xFFFFa400};
private int main_width; //圆的宽度
private float mWheelCurX, mWheelCurY; //圆的位置
private float mWheelCurX2, mWheelCurY2; //圆2的位置
private Paint circle_Paint; //圆环的画笔
private Paint select_Paint;//选中的画笔
private Paint dot1; //圆点1
private Paint dot2; //圆点2
private Context context;
private OnSeekBarChangeListener changeListener,changeListener2;
public Ring_Slide2(Context context) {
this(context,null);
}
public Ring_Slide2(Context context, AttributeSet attrs) {
this(context, attrs,0);
}
public Ring_Slide2(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
this.context=context;
initAttrs(attrs,defStyleAttr);
initPadding();
//初始化画笔
initPaints();
}
//初始化属性
private void initAttrs(AttributeSet attrs, int defStyle){
TypedArray typedArray = getContext().obtainStyledAttributes(attrs, R.styleable.Cricle_slide, defStyle, 0);
max_progress=typedArray.getInt(R.styleable.Cricle_slide_max_progress,720);
cur_progress=typedArray.getInt(R.styleable.Cricle_slide_cur_progress,420);
cur_progress2=typedArray.getInt(R.styleable.Cricle_slide_cur_progress2,540);
if (cur_progress > max_progress) cur_progress = max_progress;
if (cur_progress2 > max_progress) cur_progress2 = max_progress;
Bitmap bitmap = BitmapFactory.decodeResource(context.getResources(), R.mipmap.select_sun_bg2);
main_width= bitmap.getWidth();
ring_width=typedArray.getFloat(R.styleable.Cricle_slide_Ring_Width,main_width);
bottom_color=typedArray.getColor(R.styleable.Cricle_slide_bottom_color,getColor(R.color.select_main_bg_color));
circle_color=typedArray.getColor(R.styleable.Cricle_slide_circle_color,getColor(R.color.duration));
slide_color=typedArray.getColor(R.styleable.Cricle_slide_slide_color,getColor(R.color.time));
typedArray.recycle();
}
//初始化边距
private void initPadding(){
int paddingLeft = getPaddingLeft();
int paddingTop = getPaddingTop();
int paddingRight = getPaddingRight();
int paddingBottom = getPaddingBottom();
int paddingStart = 0, paddingEnd = 0;
if (Build.VERSION.SDK_INT >= 17) {
paddingStart = getPaddingStart();
paddingEnd = getPaddingEnd();
}
int maxPadding = Math.max(paddingLeft, Math.max(paddingTop,
Math.max(paddingRight, Math.max(paddingBottom, Math.max(paddingStart, paddingEnd)))));
setPadding(maxPadding, maxPadding, maxPadding, maxPadding);
}
private void initPaints(){
/*
圆环的画笔
*/
circle_Paint=new Paint(Paint.ANTI_ALIAS_FLAG);
circle_Paint.setAntiAlias(true);
circle_Paint.setColor(bottom_color);
circle_Paint.setStyle(Paint.Style.STROKE);
circle_Paint.setStrokeWidth(ring_width);
/*
选中区域的画笔
*/
select_Paint=new Paint(Paint.ANTI_ALIAS_FLAG);
select_Paint.setShader(new SweepGradient(0, 0, arrColorCircle, null));
/*select_Paint.setColor(circle_color);*/
select_Paint.setAntiAlias(true);
select_Paint.setStyle(Paint.Style.STROKE);
select_Paint.setStrokeWidth(ring_width);
// 画锚点
dot1 = new Paint(Paint.ANTI_ALIAS_FLAG);
dot1.setColor(circle_color);
dot1.setAntiAlias(true);
dot1.setStyle(Paint.Style.FILL);
// 画锚点2
dot2 = new Paint(Paint.ANTI_ALIAS_FLAG);
dot2.setColor(slide_color);
dot2.setAntiAlias(true);
dot2.setStyle(Paint.Style.FILL);
}
//获取宽度
private float getDimen(int dimenId) {
return getResources().getDimension(dimenId);
}
//获取颜色
@TargetApi(Build.VERSION_CODES.M)
private int getColor(int colorId) {
final int version = Build.VERSION.SDK_INT;
if (version >= 23) {
return getContext().getColor(colorId);
} else {
return ContextCompat.getColor(getContext(), colorId);
}
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
Bitmap bitmap = BitmapFactory.decodeResource(context.getResources(), R.mipmap.setalarm_colock_bg);
int height = bitmap.getHeight()+main_width*2;
int width = bitmap.getWidth()+main_width*2;
int min = Math.min(height, width);
setMeasuredDimension(min,min);
initposition();
}
private void initposition(){
//转换为360度
cur_Angle=(double) cur_progress / max_progress*360.0;
cur_Angle2=(double)cur_progress2 / max_progress*360.0;
//计算初始化旋转的角度
double cos = -Math.cos(Math.toRadians(cur_Angle));
double cos2 = -Math.cos(Math.toRadians(cur_Angle2));
//根据旋转的角度来确定位置
MakeCurPosition(cos);
MakeCurPosition2(cos2);
//确定圆环的半径
ring_Radius=(getMeasuredWidth() - getPaddingLeft() - getPaddingRight() - ring_width) / 2;
}
private void MakeCurPosition(double cos){
//根据旋转的角度来确定圆的位置
//确定x点的坐标
mWheelCurX = calcXLocationInWheel(cur_Angle, cos);
//确定y点的坐标
mWheelCurY=calcYLocationInWheel(cos);
}
private void MakeCurPosition2(double cos2){
//根据旋转的角度来确定圆的位置
//确定x点的坐标
mWheelCurX2 = calcXLocationInWheel(cur_Angle2, cos2);
//确定y点的坐标
mWheelCurY2=calcYLocationInWheel(cos2);
}
//确定x点的坐标
private float calcXLocationInWheel(double angle,double cos){
if (angle < 180) {
return (float) (getMeasuredWidth() / 2 + Math.sqrt(1 - cos * cos) * ring_Radius); //Math.sqrt正平分根 9-3
} else {
return (float) (getMeasuredWidth() / 2 - Math.sqrt(1 - cos * cos) * ring_Radius);
}
}
//确定y点的坐标
private float calcYLocationInWheel(double cos) {
return getMeasuredWidth() / 2 + ring_Radius * (float) cos;
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
float left = getPaddingLeft() + ring_width / 2;
float top = getPaddingTop() + ring_width / 2;
float right = canvas.getWidth() - getPaddingRight() - ring_width / 2;
float bottom = canvas.getHeight() - getPaddingBottom() - ring_width / 2;
float centerX = (left + right) / 2;
float centerY = (top + bottom) / 2;
float wheelRadius = (canvas.getWidth() - getPaddingLeft() - getPaddingRight()) / 2 - ring_width / 2;
canvas.drawCircle(centerX, centerY, wheelRadius, circle_Paint);
//画选中区域
// canvas.drawArc(new RectF(left, top, right, bottom), (float) (Math.PI * RADIAN + Math.acos(cur_Angle) * RADIAN), (float) (Math.abs(cur_Angle-cur_Angle2)), false, select_Paint);
Log.i("TAG","第一个的角度="+cur_Angle);
Log.i("TAG","第一个的角度2="+cur_Angle2);
float begin=0; //圆弧的起点位置
float stop=0;
if(cur_Angle>180 && cur_Angle>cur_Angle2 ){ //180 -- 360
begin=(float) (-Math.abs(cur_Angle-360)-90);
stop=(float) Math.abs(Math.abs(cur_Angle-360)+cur_Angle2);
Log.i("TAG","begin="+begin);
Log.i("TAG","stop="+stop);
}else if(cur_Angle>cur_Angle2){
begin=(float) cur_Angle-90;
stop=(float)(360-(cur_Angle-cur_Angle2));
}else {
begin=(float) cur_Angle-90;
stop=(float) Math.abs(cur_Angle-cur_Angle2);
}
canvas.drawArc(new RectF(left, top, right, bottom), begin,stop, false, select_Paint);
//画锚点 画圆
canvas.drawCircle(mWheelCurX, mWheelCurY, ring_width/2, dot1);
//画锚点 画圆
canvas.drawCircle(mWheelCurX2, mWheelCurY2, ring_width/2, dot2);
Log.i("TAG","锚点1Y"+mWheelCurY+"锚点1X"+mWheelCurX);
Log.i("TAG","锚点2Y"+mWheelCurY2+"锚点1X"+mWheelCurX2);
}
@Override
public boolean onTouchEvent(MotionEvent event) {
float x = event.getX();
float y = event.getY();
int flag=0;
//判断是否触控到两个点中的其中某个点
if(isMovedot2(x,y)){
flag=2;
}else if(isMovedot1(x,y)){
flag=1;
}
/* if(isMovedot1(x,y)){
flag=1;
}else if(isMovedot2(x,y)){
flag=2;
}*/
if(event.getAction()==MotionEvent.ACTION_MOVE || isMovedot1(x,y) ==true || isMovedot2(x,y)==true ){
Log.i("TAG","进入X="+x+"进入Y="+y);
//通过触摸点算出cos角度值
float cos = calculateCos(x, y);
// 通过反三角函数获得角度值
double angle; //获取滑动的角度
if (x < getWidth() / 2) { // 滑动超过180度
angle = Math.PI * RADIAN + Math.acos(cos) * RADIAN; //通过计算得到滑动的角度值
} else { // 没有超过180度
angle = Math.PI * RADIAN - Math.acos(cos) * RADIAN; //PI 周长比直径 返回弧角度的余弦值
}
if(flag==1){
cur_Angle=angle;
cur_progress=getSelectedValue(cur_Angle);
MakeCurPosition(cos);
if (changeListener != null) {
changeListener.onChanged(this, cur_progress);
}
}else if(flag==2){
cur_Angle2=angle;
cur_progress2=getSelectedValue(cur_Angle2);
MakeCurPosition2(cos);
if (changeListener2 != null) {
changeListener2.onChanged(this, cur_progress2);
}
}
invalidate();
return true;
}else {
return super.onTouchEvent(event);
}
}
private boolean isMovedot1(float x,float y){
float dot1x = Math.abs(mWheelCurX - x);
float dot1y = Math.abs(mWheelCurY - y);
if(dot1x<30 && dot1y<30){
return true;
}else{
return false;
}
}
private boolean isMovedot2(float x,float y){
float dot1x = Math.abs(mWheelCurX2 - x);
float dot1y = Math.abs(mWheelCurY2 - y);
if(dot1x<30 && dot1y<30){
return true;
}else{
return false;
}
}
//拿到切斜角的cos值
private float calculateCos(float x, float y){
float width = x - getWidth() / 2;
float height = y - getHeight() / 2;
float slope = (float) Math.sqrt(width * width + height * height);
return height / slope;
}
private int getSelectedValue(double mCurAngle) { //角度转进度
return Math.round(max_progress * ((float) mCurAngle / 360)); //四舍五入
}
public void setOnSeekBarChangeListener(OnSeekBarChangeListener listener) {
changeListener = listener;
}
public void setOnSeekBarChangeListener2(OnSeekBarChangeListener listener) {
changeListener2 = listener;
}
public void initRadian(int pro1,int pro2){
this.cur_progress=pro1;
this.cur_progress2=pro2;
invalidate();
}
public interface OnSeekBarChangeListener {
void onChanged(Ring_Slide2 seekbar, int curValue);
}
}自定义stayle样式，在values下新建sttrs.xml文件
//设置最大进度 //设置当前进度 //设置当前进度 //设置底色 //设置圆的颜色 //设置滑动的颜色 //圆环的宽度 （dimension是代表尺寸值）
以上所述是小编给大家介绍的Android自定义View仿IOS圆盘时间选择器，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对创新互联网站的支持！
