android实现滑动解锁

本文实例为大家分享了android实现滑动解锁的具体代码，供大家参考，具体内容如下

效果图

需要用到的画笔， 整体灰色的背景， 滑块， 滑动之后绿色背景， 字体

mSliPaint = new Paint();mSliPaint.setColor(Color.parseColor('#4a4c5b'));mSliPaint.setAntiAlias(true); mBgPaint = new Paint();mBgPaint.setColor(Color.parseColor('#a6a6a6'));mBgPaint.setAntiAlias(true); mBluePaint = new Paint();mBluePaint.setColor(Color.parseColor('#009496'));mBluePaint.setAntiAlias(true); mPaint = new Paint();mPaint.setColor(Color.WHITE);mPaint.setTextSize(mTextSize);//该方法即为设置基线上那个点究竟是left,center,还是rightmPaint.setTextAlign(Paint.Align.LEFT);

在onDraw中绘制 mMovex为手指滑动的X坐标

@Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); //背景色 RectF oval = new RectF(margin, margin, width - margin, height - margin);// 设置个新的长方形 canvas.drawRect(oval,mBgPaint); //划过去背景色 RectF ovalBlue= new RectF(margin,margin,mMoveX+margin,mR*2+margin*3); canvas.drawRect(ovalBlue,mBluePaint); //文字 Paint.FontMetrics fontMetrics = mPaint.getFontMetrics(); float top = fontMetrics.top;//为基线到字体上边框的距离 float bottom = fontMetrics.bottom;//为基线到字体下边框的距离 int baseLineY = (int) (height / 2 - top / 2 - bottom / 2);//基线中间点的y轴计算公式 canvas.drawText(mText, mTextLeft, baseLineY, mPaint); //滑块 RectF oval2 = new RectF(mMoveX+margin,margin,mMoveX+mR*3+margin*3,mR*2+margin*3);// 设置个新的长方形 canvas.drawRect(oval2,mSliPaint);//方形 //三个小箭头 Bitmap bitmap = BitmapFactory.decodeResource(this.getContext().getResources(), R.mipmap.arrow_right_small); canvas.drawBitmap(bitmap,mMoveX+(mMoveX+mR*3+margin*3-mMoveX)/2-15,mR-margin,mSliPaint); canvas.drawBitmap(bitmap,mMoveX+(mMoveX+mR*3+margin*3-mMoveX)/2,mR-margin,mSliPaint); canvas.drawBitmap(bitmap,mMoveX+(mMoveX+mR*3+margin*3-mMoveX)/2+15,mR-margin,mSliPaint); }

onTouch中进行滑动监听 负值

@Overridepublic boolean onTouchEvent(MotionEvent event) { // Log.e(event.getAction()+''); // 点击是否在滑块上 if (event.getAction() != MotionEvent.ACTION_DOWN && !mSliderRect.contains((int) mStartX, (int) mStartY)) { if (event.getAction() == MotionEvent.ACTION_UP || event.getAction() == MotionEvent.ACTION_CANCEL) { mHandler.sendEmptyMessageDelayed(MSG_REDRAW, DRAW_INTERVAL); } return super.onTouchEvent(event); } acquireVelocityTrackerAndAddMovement(event); switch (event.getAction()) { case MotionEvent.ACTION_DOWN: mStartX = event.getX(); mStartY = event.getY(); mLastX = mStartX; mHandler.removeMessages(MSG_REDRAW);// L.e('按下'); Log.e('SlideU','按下'); break; case MotionEvent.ACTION_MOVE: Log.e('SlideU','移动'); mLastX = event.getX(); if (mLastX > mStartX) { if (mLastX - mStartX > mSlidableLength) { mLastX = mStartX + mSlidableLength; mMoveX = mSlidableLength; } else { mMoveX = (int) (mLastX - mStartX); } } else { mLastX = mStartX; mMoveX = 0; } invalidate(); break; case MotionEvent.ACTION_UP: case MotionEvent.ACTION_CANCEL: Log.e('SlideU','超出或抬起'); mVelocityTracker.computeCurrentVelocity(1000, mMaxVelocity); float velocityX = mVelocityTracker.getXVelocity(); Log.e('SlideU','速度'+velocityX); if (mLastX - mStartX > mEffectiveLength || velocityX/2 > mEffectiveVelocity) { startAnimator(mLastX - mStartX, mSlidableLength, velocityX, true); } else { startAnimator(mLastX - mStartX, 0, velocityX, false); mHandler.sendEmptyMessageDelayed(MSG_REDRAW, DRAW_INTERVAL); } releaseVelocityTracker(); break; } return super.onTouchEvent(event); }

整体代码

public class LoadAwaySlideUnlockView extends View { public interface UnlockListener { void onLoadAwayUnlock(); } private UnlockListener mUnlockListener; public void setUnlockListener(UnlockListener unlockListener) { mUnlockListener = unlockListener; } private static final int MSG_REDRAW = 1; private static final int DRAW_INTERVAL = 50; private static final int STEP_LENGTH = 10;//速度 private Paint mPaint;//文字的画笔 private Paint mSliPaint;//滑块画笔 private Paint mBgPaint;//背景画笔 private Paint mBluePaint;//划过去之后蓝色背景的画笔 private VelocityTracker mVelocityTracker;//滑动速度 private int mMaxVelocity; private LinearGradient mGradient;//渐变色 private LinearGradient bgGradient;//背景渐变色// private LinearGradient sliGradient;//滑块渐变色// LinearGradient有两个构造函数;//// public LinearGradient(float x0, float y0, float x1, float y1, int[] colors, float[] positions,Shader.TileMode tile)//// 参数://// float x0: 渐变起始点x坐标//// float y0:渐变起始点y坐标//// float x1:渐变结束点x坐标//// float y1:渐变结束点y坐标//// int[] colors:颜色 的int 数组//// float[] positions: 相对位置的颜色数组,可为null, 若为null,可为null,颜色沿渐变线均匀分布//// Shader.TileMode tile: 渲染器平铺模式//////// public LinearGradient(float x0, float y0, float x1, float y1, int color0, int color1,Shader.TileMode tile)//// float x0: 渐变起始点x坐标//// float y0:渐变起始点y坐标//// float x1:渐变结束点x坐标//// float y1:渐变结束点y坐标//// int color0: 起始渐变色// int color1: 结束渐变色//// Shader.TileMode tile: 渲染器平铺模式 private int[] mGradientColors; private int[] bgGradientColors; private int mGradientIndex; private Interpolator mInterpolator; private float mDensity; private Matrix mMatrix; private ValueAnimator mValueAnimator; private int width; private int height; private String mText;//文字 private int mTextSize;//文字大小 private int mTextLeft;//文字距离左边 private int mR;//滑块的半径 private float margin; private Rect mSliderRect; private int mSlidableLength; // SlidableLength = BackgroundWidth - LeftMagins - RightMagins - SliderWidth private int mEffectiveLength; // Suggested length is 20pixels shorter than SlidableLength private float mEffectiveVelocity = 1000;//滑块自动回滚的速度 private float mStartX; private float mStartY; private float mLastX; private float mMoveX; public LoadAwaySlideUnlockView(Context context) { this(context, null); } public LoadAwaySlideUnlockView(Context context, AttributeSet attrs) { this(context, attrs, 0); } public LoadAwaySlideUnlockView(Context context, AttributeSet attrs, int defStyleAttr) { this(context, attrs, defStyleAttr, 0); } public void setText(String text){ mText = text; } public LoadAwaySlideUnlockView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) { super(context, attrs, defStyleAttr, defStyleRes); mDensity = getResources().getDisplayMetrics().density; ViewConfiguration configuration = ViewConfiguration.get(context); mMaxVelocity = configuration.getScaledMaximumFlingVelocity(); mInterpolator = new AccelerateDecelerateInterpolator(); setClickable(true); setFocusable(true); setFocusableInTouchMode(true); mSlidableLength = 200; mTextSize = 30;//文字大小 mTextLeft = 10;//文字距离左边 mMoveX = 0; mGradientIndex = 0; mSliPaint = new Paint(); mSliPaint.setColor(Color.parseColor('#4a4c5b')); mSliPaint.setAntiAlias(true); mBgPaint = new Paint(); mBgPaint.setColor(Color.parseColor('#a6a6a6')); mBgPaint.setAntiAlias(true); mBluePaint = new Paint(); mBluePaint.setColor(Color.parseColor('#009496')); mBluePaint.setAntiAlias(true); mPaint = new Paint(); mPaint.setColor(Color.WHITE); mPaint.setTextSize(mTextSize); //该方法即为设置基线上那个点究竟是left,center,还是right mPaint.setTextAlign(Paint.Align.LEFT); // mHandler.sendEmptyMessageDelayed(MSG_REDRAW, DRAW_INTERVAL); } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { super.onMeasure(widthMeasureSpec, heightMeasureSpec); int specWidthSize = MeasureSpec.getSize(widthMeasureSpec);//宽 int specHeightSize = MeasureSpec.getSize(heightMeasureSpec);//高 mMatrix = new Matrix(); width = specWidthSize; height = specHeightSize; mTextLeft = (int) (height * 1.5); margin = height / 20; mR = (int) (((height-margin*2) / 2)-margin); //最大滑动距离 mSlidableLength = (int) (specWidthSize -(mMoveX+mR*3+margin*3-mMoveX+margin)); //有效距离 mEffectiveLength = mSlidableLength-20; mSliderRect=new Rect((int)margin, (int)margin, 300, (int)(height - margin)); mGradientColors = new int[]{Color.argb(255, 120, 120, 120), Color.argb(255, 120, 120, 120), Color.argb(255, 255, 255, 255)}; mGradient = new LinearGradient(0, 0, width/2, 0, mGradientColors, new float[]{0, 0.7f, 1}, Shader.TileMode.MIRROR); bgGradient = new LinearGradient( 0, 0, 0, (float) ((height)/2.0), Color.argb(80, 0X77, 0X77, 0X77), Color.argb(200, 0X11, 0X11, 0X11), Shader.TileMode.CLAMP ); mHandler.removeMessages(MSG_REDRAW); mHandler.sendEmptyMessageDelayed(MSG_REDRAW, DRAW_INTERVAL); } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); //背景色 RectF oval = new RectF(margin, margin, width - margin, height - margin);// 设置个新的长方形 canvas.drawRect(oval,mBgPaint); //划过去背景色 RectF ovalBlue= new RectF(margin,margin,mMoveX+margin,mR*2+margin*3); canvas.drawRect(ovalBlue,mBluePaint); //文字 Paint.FontMetrics fontMetrics = mPaint.getFontMetrics(); float top = fontMetrics.top;//为基线到字体上边框的距离 float bottom = fontMetrics.bottom;//为基线到字体下边框的距离 int baseLineY = (int) (height / 2 - top / 2 - bottom / 2);//基线中间点的y轴计算公式 canvas.drawText(mText, mTextLeft, baseLineY, mPaint); //滑块 RectF oval2 = new RectF(mMoveX+margin,margin,mMoveX+mR*3+margin*3,mR*2+margin*3);// 设置个新的长方形 canvas.drawRect(oval2,mSliPaint);//方形 //三个小箭头 Bitmap bitmap = BitmapFactory.decodeResource(this.getContext().getResources(), R.mipmap.arrow_right_small); canvas.drawBitmap(bitmap,mMoveX+(mMoveX+mR*3+margin*3-mMoveX)/2-15,mR-margin,mSliPaint); canvas.drawBitmap(bitmap,mMoveX+(mMoveX+mR*3+margin*3-mMoveX)/2,mR-margin,mSliPaint); canvas.drawBitmap(bitmap,mMoveX+(mMoveX+mR*3+margin*3-mMoveX)/2+15,mR-margin,mSliPaint); } public void reset() { if (mValueAnimator != null) { mValueAnimator.cancel(); } mMoveX = 0; mPaint.setAlpha(255); mHandler.removeMessages(MSG_REDRAW); mHandler.sendEmptyMessageDelayed(MSG_REDRAW,200); } @Override public boolean onTouchEvent(MotionEvent event) { // Log.e(event.getAction()+''); // 点击是否在滑块上 if (event.getAction() != MotionEvent.ACTION_DOWN && !mSliderRect.contains((int) mStartX, (int) mStartY)) { if (event.getAction() == MotionEvent.ACTION_UP || event.getAction() == MotionEvent.ACTION_CANCEL) { mHandler.sendEmptyMessageDelayed(MSG_REDRAW, DRAW_INTERVAL); } return super.onTouchEvent(event); } acquireVelocityTrackerAndAddMovement(event); switch (event.getAction()) { case MotionEvent.ACTION_DOWN: mStartX = event.getX(); mStartY = event.getY(); mLastX = mStartX; mHandler.removeMessages(MSG_REDRAW);// L.e('按下'); Log.e('SlideU','按下'); break; case MotionEvent.ACTION_MOVE: Log.e('SlideU','移动'); mLastX = event.getX(); if (mLastX > mStartX) { if (mLastX - mStartX > mSlidableLength) { mLastX = mStartX + mSlidableLength; mMoveX = mSlidableLength; } else { mMoveX = (int) (mLastX - mStartX); } } else { mLastX = mStartX; mMoveX = 0; } invalidate(); break; case MotionEvent.ACTION_UP: case MotionEvent.ACTION_CANCEL: Log.e('SlideU','超出或抬起'); mVelocityTracker.computeCurrentVelocity(1000, mMaxVelocity); float velocityX = mVelocityTracker.getXVelocity(); Log.e('SlideU','速度'+velocityX); if (mLastX - mStartX > mEffectiveLength || velocityX/2 > mEffectiveVelocity) { startAnimator(mLastX - mStartX, mSlidableLength, velocityX, true); } else { startAnimator(mLastX - mStartX, 0, velocityX, false); mHandler.sendEmptyMessageDelayed(MSG_REDRAW, DRAW_INTERVAL); } releaseVelocityTracker(); break; } return super.onTouchEvent(event); } private void startAnimator(float start, float end, float velocity, boolean isRightMoving) { if (velocity < mEffectiveVelocity) { velocity = mEffectiveVelocity; } int duration = (int) (Math.abs(end - start) * 1000 / velocity); mValueAnimator = ValueAnimator.ofFloat(start, end); mValueAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() { @Override public void onAnimationUpdate(ValueAnimator animation) { mMoveX = (Float) animation.getAnimatedValue(); invalidate(); } }); mValueAnimator.setDuration(duration); mValueAnimator.setInterpolator(mInterpolator); if (isRightMoving) { mValueAnimator.addListener(new Animator.AnimatorListener() { @Override public void onAnimationStart(Animator animation) { } @Override public void onAnimationEnd(Animator animation) {// L.e('解锁'); Log.e('SlideU','解锁'); if (mUnlockListener != null) { mUnlockListener.onLoadAwayUnlock(); } } @Override public void onAnimationCancel(Animator animation) { } @Override public void onAnimationRepeat(Animator animation) { } }); } mValueAnimator.start(); } private void acquireVelocityTrackerAndAddMovement(MotionEvent ev) { if (mVelocityTracker == null) { mVelocityTracker = VelocityTracker.obtain(); } mVelocityTracker.addMovement(ev); } private void releaseVelocityTracker() { if (mVelocityTracker != null) { mVelocityTracker.recycle(); mVelocityTracker = null; } } private Handler mHandler = new Handler() { public void handleMessage(Message msg) { super.handleMessage(msg); switch (msg.what) { case MSG_REDRAW: if(mMatrix==null){ mMatrix = new Matrix(); } mMatrix.setTranslate(mGradientIndex, 0); if(mGradient==null){// L.e('mGradient空'); mGradientColors = new int[]{Color.argb(255, 120, 120, 120),Color.argb(255, 120, 120, 120), Color.argb(255, 255, 255, 255)}; mGradient = new LinearGradient(0, 0, width/2, 0, mGradientColors,new float[]{0, 0.7f, 1}, Shader.TileMode.MIRROR); } mGradient.setLocalMatrix(mMatrix); invalidate(); mGradientIndex += STEP_LENGTH ; if(mGradientIndex>=Integer.MAX_VALUE){ mGradientIndex = 0; } mHandler.sendEmptyMessageDelayed(MSG_REDRAW, DRAW_INTERVAL); break; } } };}

xml布局

<xxxx.LoadAwaySlideUnlockView android: android:layout_marginLeft='3dp' android:layout_marginRight='3dp' android:layout_width='match_parent' android:layout_height='56dp'/>

activity中 添加提示文字和滑动监听即可

slideUnlock.setText('中间提示文字');slideUnlock.setSlideListener(this);

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持好吧啦网。