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);
}
@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
到此这篇关于Android自定View实现滑动验证效果的文章就介绍到这了,更多相关Android自定View滑动验证内容请搜索脚本之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持脚本之家！