Android自定View实现滑动验证效果的代码 Android自定View实现滑动验证效果

效果图

自定义属性代码

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); }@Overrideprotected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {super.onMeasure(widthMeasureSpec, heightMeasureSpec); parentWidth = getMyWSize(widthMeasureSpec); proHeight = getMyHSize(heightMeasureSpec); setMeasuredDimension((int) parentWidth, proHeight); }@SuppressLint("DrawAllocation")@Overrideprotected 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")@Overridepublic 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() {@Overridepublic 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

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