您好,登录后才能下订单哦!
这篇“android自定义控件如何实现简易时间轴”除了程序员外大部分人都不太理解,今天小编为了让大家更加理解“android自定义控件如何实现简易时间轴”,给大家总结了以下内容,具有一定借鉴价值,内容详细步骤清晰,细节处理妥当,希望大家通过这篇文章有所收获,下面让我们一起来看看具体内容吧。
效果如下:
代码:
private Paint bgPaint, linePaint, borderPaint,textPaint; private Rect bgRect, textRect; //基本属性 private int mTextSize; private int mTextColor; private String mTextTitle="默认文本内容"; private int lineColr = Color.parseColor("#AAAAAA"); private int borderColor = Color.parseColor("#AAAAAA"); private int bgColor = Color.parseColor("#138DDD"); private int mBorderColor=0xFFDDDDDD; private int mBorderWidth = 10; private int mLineColor=Color.parseColor("#ff000000"); private int mLineWidth = 2; private int mLineHeight; private int mBgColor; private int mWidth =0; private int mHeight =300;//整个控件的宽和高 //line绘制 private int lineLocation = -1;//0 上方 1 下方 2 上下两个 private int mRadius = 90;//直径,最终会被宽高限制 //设置line的位置 0 上方 1 下方 2 上下两个 public void setLineLocation(int lineLocation) { this.lineLocation = lineLocation; } //设置纯色的整圆形,包括背景 public void setBgAndBorderColor(int color) { this.mBgColor = color; } public void setmHeight(int mHeight) { this.mHeight = mHeight; } public void setmBorderColor(int mBorderColor) { this.mBorderColor = mBorderColor; } public void setmTextTitle(String mTextTitle) { this.mTextTitle = mTextTitle; } public void setmRadius(int mRadius) { this.mRadius = mRadius; } public void setmLineHeight(int mLineHeight) { this.mLineHeight = mLineHeight; } public TimeLineSingleView(Context context) { this(context,null); } public TimeLineSingleView(Context context, AttributeSet attrs) { this(context, attrs,0); } public TimeLineSingleView(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); TypedArray a = context.getTheme().obtainStyledAttributes(attrs, R.styleable.CustomCicleView, defStyleAttr, 0); int n = a.getIndexCount(); for (int i = 0; i < n; i++) { int attr = a.getIndex(i); switch (attr) { case R.styleable.CustomCicleView_textSize: // 默认设置为16sp,TypeValue也可以把sp转化为px mTextSize = a.getDimensionPixelSize(attr, (int) TypedValue.applyDimension( TypedValue.COMPLEX_UNIT_DIP, 14, getResources().getDisplayMetrics())); break; case R.styleable.CustomCicleView_textColor: mTextColor = a.getColor(attr, Color.BLACK); break; case R.styleable.CustomCicleView_textTitle: mTextTitle = a.getString(attr); break; case R.styleable.CustomCicleView_lineWidth: mLineWidth = a.getDimensionPixelSize(attr, (int) TypedValue.applyDimension( TypedValue.COMPLEX_UNIT_DIP, 2, getResources().getDisplayMetrics())); break; case R.styleable.CustomCicleView_lineColor: mLineColor = a.getColor(attr, lineColr); break; case R.styleable.CustomCicleView_mRadius: mRadius=a.getDimensionPixelSize(attr, (int) TypedValue.applyDimension( TypedValue.COMPLEX_UNIT_DIP, 100, getResources().getDisplayMetrics())); break; case R.styleable.CustomCicleView_borderWidth: mBorderWidth = a.getDimensionPixelSize(attr, (int) TypedValue.applyDimension( TypedValue.COMPLEX_UNIT_DIP, 10, getResources().getDisplayMetrics())); break; case R.styleable.CustomCicleView_borderColor: mBorderColor = a.getColor(attr, borderColor); break; case R.styleable.CustomCicleView_bgColor: mBgColor = a.getColor(attr, bgColor); break; } } a.recycle(); bgPaint = new Paint(); borderPaint = new Paint(); linePaint = new Paint(); textPaint = new Paint(); textRect = new Rect(); textPaint.setTextSize(mTextSize); } //EXACTLY :在准确的数值和Match_parent的状态是这个值 列表中,wrap_content的状态下必须计算一个合适的值 @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { super.onMeasure(widthMeasureSpec, heightMeasureSpec); int w = 0; int h =0; int widthMode=MeasureSpec.getMode(widthMeasureSpec); int heightMode=MeasureSpec.getMode(heightMeasureSpec); int widthSize = MeasureSpec.getSize(widthMeasureSpec); int heightSize = MeasureSpec.getSize(heightMeasureSpec); if(widthMode==MeasureSpec.EXACTLY){ w=widthSize; }else{ w=Math.max(mHeight,mRadius+getPaddingRight()+getPaddingLeft()); } if(heightMode==MeasureSpec.EXACTLY){ h=heightSize; }else{ h=Math.max(mHeight,mRadius+getPaddingTop()+getPaddingBottom()); } setMeasuredDimension(w,h); } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); int centreX = getWidth()/ 2; // 获取圆心的x坐标 int centreY=getHeight()/2; //半径比较 mBorderWidth =(mBorderWidth>=mRadius/10)?(mRadius/10):mBorderWidth;//半径的1/5 int radius = mRadius/2 - mBorderWidth / 2;// 半径 if(mLineHeight<=0){ mLineHeight=Math.abs(getHeight()/2-radius);//这个地方要判断设置正负 } //绘制圆 bgPaint.setAntiAlias(true); // 消除锯齿 bgPaint.setColor(mBgColor); bgPaint.setStyle(Paint.Style.FILL); // 设置实心 canvas.drawCircle(centreX, centreY, radius, bgPaint); //绘制圆环 borderPaint.setStrokeWidth(mBorderWidth); // 设置圆环的宽度 borderPaint.setAntiAlias(true); // 消除锯齿 if (mBorderColor != 0) { borderPaint.setColor(mBorderColor); } else { borderPaint.setColor(borderColor); } borderPaint.setStyle(Paint.Style.STROKE); // 设置实心 canvas.drawCircle(centreX,centreY, radius - mBorderWidth / 2+mLineWidth/2, borderPaint); //绘制文本 textPaint.setTextSize(mTextSize); textPaint.setColor(mTextColor); textPaint.getTextBounds(mTextTitle, 0, mTextTitle.length(), textRect); canvas.drawText(mTextTitle, centreX -textRect.width()/2-mBorderWidth/2, centreY + textRect.height() / 2, textPaint); //绘制线条 drawLineAll(canvas,centreX,centreY,radius); } //上下都绘制不用 //1 上方 0 下方 2 上下两个 private void drawLineAll(Canvas canvas, float centreX, float centreY,int radius) { if(lineLocation==-1){ linePaint.setColor(borderColor); linePaint.setStrokeWidth(mLineWidth); canvas.drawLine(centreX, 0, centreX, centreY-radius, linePaint);//上方的 canvas.drawLine(centreX, centreY+radius, centreX, getHeight(), linePaint);//下方的 }else{ //这个可以绘制不同的line linePaint.setColor(lineColr); linePaint.setStrokeWidth(mLineWidth); if (lineLocation == 0) { canvas.drawLine(centreX, centreY+radius, centreX, getHeight(), linePaint); } else if (lineLocation == 1) { canvas.drawLine(centreX, 0, centreX, centreY -radius , linePaint); } else if (lineLocation == 2) { canvas.drawLine(centreX, centreY+radius, centreX, getHeight(), linePaint); canvas.drawLine(centreX, 0, centreX, centreY -radius , linePaint); } } }
其他代码和之前文章一样就不贴了,但是还有一个问题就是,这个控件是放在一个列表里面的,你在适配器中使用的时候布局要是wrap的状态下要计算一个合适的高度,比如listView 的Item的高度。这里我没有实现,还是在Match和固定高度中,后期更改。
Android是一种基于Linux内核的自由及开放源代码的操作系统,主要使用于移动设备,如智能手机和平板电脑,由美国Google公司和开放手机联盟领导及开发。
感谢您的阅读,希望您对“android自定义控件如何实现简易时间轴”这一关键问题有了一定的理解,具体使用情况还需要大家自己动手实验使用过才能领会,快去试试吧,如果想阅读更多相关知识点的文章,欢迎关注亿速云行业资讯频道!
免责声明:本站发布的内容(图片、视频和文字)以原创、转载和分享为主,文章观点不代表本网站立场,如果涉及侵权请联系站长邮箱:is@yisu.com进行举报,并提供相关证据,一经查实,将立刻删除涉嫌侵权内容。