效果图
<?xml version="1.0" encoding="utf-8"?>
<resources>
<declare-styleable name="mycheckview">
<attr name="m_blockbg" format="reference" /><!--滑块背景图片-->
<attr name="m_blockcolor" format="color" /><!--滑块颜色-->
<attr name="m_blockshadowlayer" format="color" /><!--滑块阴影颜色-->
<attr name="m_procolor" format="color" /><!--进度条颜色-->
<attr name="m_reccolor" format="color" /><!--矩形背景色-->
<attr name="m_circlesize" format="integer" /><!--圆角角度值-->
</declare-styleable>
</resources>
自定义view代码
public class mycheckview extends view {
private boolean isblockarea = false;
private boolean ismove = false;
private boolean isfinish = false;
private boolean isdown = false;
private int mright;
private int startx = 0;
/**
* 滑块边距
*/
private final int blocksize = sizeutils.dp2px(5);
/**
* 相关属性
*/
private int m_blockcolor = color.white;//默认滑块颜色
private int m_blockshadowlayer = color.parsecolor("#d8d8d8");//默认滑块阴影色
private int m_procolor = color.parsecolor("#ff3159");//默认进度条颜色
private int m_reccolor = color.parsecolor("#d8d8d8");//默认矩形颜色
private int blockdrawableid;//默认滑块背景图
/**
* 矩形画笔
*/
private final paint recpaint = new paint();
/**
* 进度条画笔
*/
private final paint propaint = new paint();
/**
* 滑块画笔
*/
private final paint blockpaint = new paint();
/**
* 圆角角度
*/
private int circlesize = sizeutils.dp2px(20);
/**
* 记录父控件宽度
*/
private float parentwidth = 0f;
/**
* 矩形高度
*/
private int proheight;
/**
* 默认高度
*/
private final int default_height = sizeutils.dp2px(45);
/**
* 滑块宽度
*/
private final int blockwidth = sizeutils.dp2px(60);
/**
* 手指落下位置
*/
private int dx;
/**
* 偏移距离
*/
private int mx;
/**
* 接口回调
*/
private finishlistener finishlistener;
public void setfinishlistener(finishlistener finishlistener) {
this.finishlistener = finishlistener;
}
public mycheckview(@nonnull context context) {
super(context);
init();
}
public mycheckview(@nonnull context context, @nullable attributeset attrs) {
super(context, attrs);
initparams(context, attrs);
init();
}
public mycheckview(@nonnull context context, @nullable attributeset attrs, int defstyleattr) {
super(context, attrs, defstyleattr);
initparams(context, attrs);
init();
}
/**
* 初始化自定义属性
*
* @param context 上下文
* @param attrs 属性参数
*/
private void initparams(context context, attributeset attrs) {
typedarray typedarray = context.obtainstyledattributes(attrs, r.styleable.mycheckview);
if (typedarray != null) {
//获取滑块背景图片
blockdrawableid = typedarray.getresourceid(r.styleable.mycheckview_m_blockbg, -1);
//获取滑块颜色
m_blockcolor = typedarray.getcolor(r.styleable.mycheckview_m_blockcolor, m_blockcolor);
//滑块阴影色
m_blockshadowlayer = typedarray.getcolor(r.styleable.mycheckview_m_blockcolor, m_blockshadowlayer);
//进度条颜色
m_procolor = typedarray.getcolor(r.styleable.mycheckview_m_blockcolor, m_procolor);
//矩形颜色
m_reccolor = typedarray.getcolor(r.styleable.mycheckview_m_blockcolor, m_reccolor);
//圆角角度值
circlesize = typedarray.getint(r.styleable.mycheckview_m_blockcolor, circlesize);
typedarray.recycle();
}
}
/**
* 初始化画笔
*/
private void init() {
//设置矩形背景色
recpaint.setcolor(m_reccolor);
recpaint.setstyle(paint.style.fill);
recpaint.setantialias(true);
//设置进度条背景色
propaint.setcolor(m_procolor);
propaint.setstyle(paint.style.fill);
recpaint.setantialias(true);
//判断是否使用了背景图
if (blockdrawableid != -1) {
//设置滑块背景色
blockpaint.setcolor(m_blockcolor);
blockpaint.setstyle(paint.style.fill_and_stroke);
blockpaint.setantialias(true);
//给滑块添加阴影
blockpaint.setshadowlayer(35, 1, 1, m_blockshadowlayer);
} else {
blockpaint.setstyle(paint.style.fill_and_stroke);
blockpaint.setantialias(true);
}
}
public void blockreset() {
mx = 0;
reset(startx);
}
@override
protected void onmeasure(int widthmeasurespec, int heightmeasurespec) {
super.onmeasure(widthmeasurespec, heightmeasurespec);
parentwidth = getmywsize(widthmeasurespec);
proheight = getmyhsize(heightmeasurespec);
setmeasureddimension((int) parentwidth, proheight);
}
@suppresslint("drawallocation")
@override
protected void ondraw(canvas canvas) {
super.ondraw(canvas);
//绘制矩形
rectf rectf = new rectf();
rectf.left = 1;
rectf.right = parentwidth - 1;
rectf.top = 1;
rectf.bottom = proheight - 1;
//绘制圆角矩形
canvas.drawroundrect(rectf, circlesize, circlesize, recpaint);
if (ismove || isdown) {
//绘制进度条
rectf rectp = new rectf();
rectp.left = 1;
rectp.right = blockwidth + blocksize + mx;
rectp.top = 1;
rectp.bottom = proheight - 1;
canvas.drawroundrect(rectp, circlesize, circlesize, propaint);
}
//绘制滑块
rectf rectb = new rectf();
rectb.left = blocksize + mx;
rectb.right = blockwidth + mx;
rectb.top = blocksize;
rectb.bottom = proheight - blocksize;
mright = (int) rectb.right;
//判断是否使用了背景图
if (blockdrawableid != -1) {
//绘制背景图
bitmap bitmap = bitmapfactory.decoderesource(getresources(), blockdrawableid);
rect rect = new rect(0, 0, bitmap.getwidth(), bitmap.getheight());
canvas.drawbitmap(bitmap, rect, rectb, blockpaint);
} else {
//绘制滑块
canvas.drawroundrect(rectb, circlesize, circlesize, blockpaint);
}
}
@suppresslint("clickableviewaccessibility")
@override
public boolean ontouchevent(motionevent event) {
switch (event.getaction()) {
case motionevent.action_down:
dx = (int) event.getx();
int dy = (int) event.gety();
int top = gettop();
int bottom = getbottom();
//判断区域是否为滑块
if (dx > blocksize && dx < blockwidth && dy > blocksize && dy < (bottom - top)) {
isblockarea = true;
}
return true;
case motionevent.action_move:
if (isblockarea) {
mx = (int) event.getx() - dx;
//设置范围
if ((blockwidth + blocksize + mx) < parentwidth && (blocksize + mx) >= blocksize) {
//计算偏移量
invalidate();
startx = (int) event.getx() - blockwidth / 2;
} else if ((blocksize + mx) >= blocksize) {
//超出复位
mx = (int) parentwidth - blockwidth - blocksize;
invalidate();
}
ismove = true;
}
return true;
case motionevent.action_up:
case motionevent.action_cancel:
isblockarea = false;
isfinish = mright == parentwidth - blocksize;
if (isfinish) {
//监听回调
if (finishlistener != null) {
finishlistener.finish();
}
}
if (!isfinish && ismove) {
reset(startx);
}
break;
}
return super.ontouchevent(event);
}
/**
* 松手回弹动画效果
*/
private void reset(int start) {
valueanimator valueanimator = valueanimator.ofint(start, 0);
valueanimator.setduration(500);
valueanimator.start();
valueanimator.addupdatelistener(animation -> {
mx = (int) animation.getanimatedvalue();
//刷新
invalidate();
});
valueanimator.addlistener(new animatorlisteneradapter() {
@override
public void onanimationend(animator animation) {
ismove = false;
isfinish = false;
startx = 0;
}
});
}
/**
* 获取测量大小
*/
private int getmywsize(int measurespec) {
int result;
int specmode = measurespec.getmode(measurespec);
int specsize = measurespec.getsize(measurespec);
if (specmode == measurespec.exactly) {
result = specsize;//确切大小,所以将得到的尺寸给view
} else if (specmode == measurespec.at_most) {
result = math.min(getscreenwidth() - 20, specsize);
} else {
result = getscreenwidth() - 20;
}
return result;
}
/**
* 获取测量大小
*/
private int getmyhsize(int measurespec) {
int result;
int specmode = measurespec.getmode(measurespec);
int specsize = measurespec.getsize(measurespec);
if (specmode == measurespec.exactly) {
result = specsize;//确切大小,所以将得到的尺寸给view
} else if (specmode == measurespec.at_most) {
result = math.min(default_height, specsize);
} else {
result = default_height - 20;
}
return result;
}
/**
* 获取屏幕宽度
*/
private int getscreenwidth() {
windowmanager windowmanager = (windowmanager) getcontext().getsystemservice(context.window_service);
displaymetrics displaymetrics = new displaymetrics();
windowmanager.getdefaultdisplay().getmetrics(displaymetrics);
return displaymetrics.widthpixels;
}
/**
* 接口回调方法
*/
public interface finishlistener {
void finish();
}
}
使用方法
<com.guanwei.globe.view.mycheckview
android:id="@+id/checkview"
android:layout_width="200dp"
android:layout_height="wrap_content"
android:layout_marginleft="20dp"
android:layout_marginright="20dp"
app:layout_constraintleft_toleftof="parent"
app:layout_constraintright_torightof="parent"
app:layout_constraintbottom_tobottomof="parent"
app:layout_constrainttop_totopof="parent"
app:m_blockbg="@mipmap/block" />
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