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這篇“android自定義控件如何實(shí)現(xiàn)簡(jiǎn)易時(shí)間軸”除了程序員外大部分人都不太理解,今天小編為了讓大家更加理解“android自定義控件如何實(shí)現(xiàn)簡(jiǎn)易時(shí)間軸”,給大家總結(jié)了以下內(nèi)容,具有一定借鑒價(jià)值,內(nèi)容詳細(xì)步驟清晰,細(xì)節(jié)處理妥當(dāng),希望大家通過(guò)這篇文章有所收獲,下面讓我們一起來(lái)看看具體內(nèi)容吧。
效果如下:
代碼:
private Paint bgPaint, linePaint, borderPaint,textPaint; private Rect bgRect, textRect; //基本屬性 private int mTextSize; private int mTextColor; private String mTextTitle="默認(rèn)文本內(nèi)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;//整個(gè)控件的寬和高 //line繪制 private int lineLocation = -1;//0 上方 1 下方 2 上下兩個(gè) private int mRadius = 90;//直徑,最終會(huì)被寬高限制 //設(shè)置line的位置 0 上方 1 下方 2 上下兩個(gè) public void setLineLocation(int lineLocation) { this.lineLocation = lineLocation; } //設(shè)置純色的整圓形,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: // 默認(rèn)設(shè)置為16sp,TypeValue也可以把sp轉(zhuǎn)化為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 :在準(zhǔn)確的數(shù)值和Match_parent的狀態(tài)是這個(gè)值 列表中,wrap_content的狀態(tài)下必須計(jì)算一個(gè)合適的值 @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; // 獲取圓心的x坐標(biāo) int centreY=getHeight()/2; //半徑比較 mBorderWidth =(mBorderWidth>=mRadius/10)?(mRadius/10):mBorderWidth;//半徑的1/5 int radius = mRadius/2 - mBorderWidth / 2;// 半徑 if(mLineHeight<=0){ mLineHeight=Math.abs(getHeight()/2-radius);//這個(gè)地方要判斷設(shè)置正負(fù) } //繪制圓 bgPaint.setAntiAlias(true); // 消除鋸齒 bgPaint.setColor(mBgColor); bgPaint.setStyle(Paint.Style.FILL); // 設(shè)置實(shí)心 canvas.drawCircle(centreX, centreY, radius, bgPaint); //繪制圓環(huán) borderPaint.setStrokeWidth(mBorderWidth); // 設(shè)置圓環(huán)的寬度 borderPaint.setAntiAlias(true); // 消除鋸齒 if (mBorderColor != 0) { borderPaint.setColor(mBorderColor); } else { borderPaint.setColor(borderColor); } borderPaint.setStyle(Paint.Style.STROKE); // 設(shè)置實(shí)心 canvas.drawCircle(centreX,centreY, radius - mBorderWidth / 2+mLineWidth/2, borderPaint); //繪制文本 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); //繪制線條 drawLineAll(canvas,centreX,centreY,radius); } //上下都繪制不用 //1 上方 0 下方 2 上下兩個(gè) 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{ //這個(gè)可以繪制不同的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); } } }
其他代碼和之前文章一樣就不貼了,但是還有一個(gè)問(wèn)題就是,這個(gè)控件是放在一個(gè)列表里面的,你在適配器中使用的時(shí)候布局要是wrap的狀態(tài)下要計(jì)算一個(gè)合適的高度,比如listView 的Item的高度。這里我沒(méi)有實(shí)現(xiàn),還是在Match和固定高度中,后期更改。
Android是一種基于Linux內(nèi)核的自由及開(kāi)放源代碼的操作系統(tǒng),主要使用于移動(dòng)設(shè)備,如智能手機(jī)和平板電腦,由美國(guó)Google公司和開(kāi)放手機(jī)聯(lián)盟領(lǐng)導(dǎo)及開(kāi)發(fā)。
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