Paint

Paint === ###### tags: `Android developer` `Kotlin` android.graphics.Paint 關於如何繪製幾何圖形、文字、點陣圖、顏色訊息 ## Constructors ### Paint() ### Paint(flags: Int) ### Paint(paint: Paint!) ## Nested classes ### [Style](https://hackmd.io/-DnQh-ERS-CyNS2qPjQCsw?both) ## 常量 ### ANTI_ALIAS_FLAG :::info 繪製抗鋸齒 ::: :::warning **Ex:** ```kotlin= Paint(ANTI_ALIAS_FLAG) Paint().flags=ANTI_ALIAS_FLAG ``` ::: ## 方法 ### setAntiAlias(aa: Boolean): Unit :::info 設置抗鋸齒 ::: :::warning **Ex:** ```kotlin= Paint().isAntiAlias = true //等同 Paint(ANTI_ALIAS_FLAG) Paint().flags=ANTI_ALIAS_FLAG ``` ::: ### setColor(color: Int): Unit :::info 設置顏色 ::: :::warning **Ex:** ```kotlin= Paint().color = Color.RED ``` ::: ### setStyle （style ： Paint.Style！） :::info 設置繪畫的樣式，用於控制如何解釋基元的幾何 ::: :::warning **Ex:** ```kotlin= Paint().style = Paint.Style.FILL //填充內部 Paint().style = Paint.Style.FILL_AND_STROKE //填充內部還有描邊 Paint().style = Paint.Style.STROKE //僅描邊 ``` :::danger **輸出結果 :** ![](https://i.imgur.com/jrAzzaF.png) ::: :::success FILL_AND_STROKE = FILL + STROKE 合成 ::: ### setTextAlign(align: Paint.Align!): Unit :::info 設置 Paint 的文本對齊方式。它控製文本相對於其原點的定位方式。左對齊意味著所有文本都將被繪製到其原點的右側（即原點指定文本的左邊緣），依此類推。 ::: :::success **參數** align : 為 Paint 文本設置繪畫的“對齊”值。 ::: :::warning **Ex:** ```kotlin= Paint().textAlign=Paint.Align.LEFT //靠左 Paint().textAlign=Paint.Align.CENTER //置中 Paint().textAlign=Paint.Align.RIGHT //靠右 ``` :::danger **輸出結果 :** ![](https://i.imgur.com/GjzyBuR.png) ::: ### setFakeBoldText(fakeBoldText: Boolean): Unit :::info 設置是否粗體 ::: :::success **參數** fakeBoldText : 如果在 paint 的標誌中設置fakeBoldText，則為true;如果為false，則為false。 ::: :::warning **Ex:** ```kotlin= val paint = Paint().apply { color=Color.RED style=Paint.Style.FILL strokeWidth=5f textSize=80f isFakeBoldText=true } canvas?.drawText("isFakeBoldText",100f,200f,paint) ``` :::danger **輸出結果 :** ![](https://i.imgur.com/QF3fvNw.png) ::: ### setUnderlineText(underlineText: Boolean): Unit :::info 設置是否有底線 ::: :::success **參數** underlineText : 如果設置paint的標誌中的underlineText位，則為true，false表示清除它。 ::: :::warning **Ex:** ```kotlin= val paint = Paint().apply { color=Color.RED style=Paint.Style.FILL strokeWidth=5f textSize=80f isUnderlineText=true } canvas?.drawText("isUnderlineText",100f,200f,paint) ``` :::danger **輸出結果 :** ![](https://i.imgur.com/07XqOX5.png) ::: ### setStrikeThruText(strikeThruText: Boolean): Unit :::info 設置是否有刪除線 ::: :::success **參數** strikeThruText : 如果在paint的標誌中設置strikeThruText，則為true，false為清除它。 ::: :::warning **Ex:** ```kotlin= val paint = Paint().apply { color=Color.RED style=Paint.Style.FILL strokeWidth=5f textSize=80f isStrikeThruText=true } canvas?.drawText("isStrikeThruText",100f,200f,paint) ``` :::danger **輸出結果 :** ![](https://i.imgur.com/ARvIPHB.png) ::: ### setTextSkewX(skewX: Float): Unit :::info 設置文字的 Paint 水平傾斜因子。默認值為0 ，負值向右傾斜，正值向左傾斜，對於近似斜文本，請使用-0.25左右的值。 ::: :::success **參數** skewX : 將繪製的傾斜因子設置為X以繪製文本。 ::: :::warning **Ex:** ```kotlin= val paint = Paint().apply { color=Color.RED style=Paint.Style.FILL strokeWidth=5f textSize=30f } canvas?.drawText("正常傾斜",100f,200f,paint) paint.textSkewX=-0.25f canvas?.drawText("-0.25傾斜",100f,300f,paint) paint.textSkewX=0.25f canvas?.drawText("0.25傾斜",100f,400f,paint) ``` :::danger **輸出結果 :** ![](https://i.imgur.com/n4bsxsn.png) ::: ### setTextSize(textSize: Float): Unit :::info 設置 Paint 的文字水平比例。默認值為1.0。值> 1.0將擴大文本範圍。值<1.0將使文本拉伸得更窄。 ::: :::success **參數** textSize : 將 Paint 的比例設置為X以繪製/測量文本。 ::: :::warning **Ex:** ```kotlin= val paint = Paint().apply { color=Color.RED style=Paint.Style.FILL strokeWidth=5f textSize=30f } canvas?.drawText("正常拉伸",100f,200f,paint) paint.textScaleX=2f canvas?.drawText("放大拉伸",100f,300f,paint) paint.textScaleX=0.5f canvas?.drawText("縮小拉伸",100f,400f,paint) ``` :::danger **輸出結果 :** ![](https://i.imgur.com/4NQ6TuG.png) ::: ### setTypeface(typeface: Typeface!): Typeface! :::info 設置或清除字體。 ::: :::success **參數** typeface : 可能是null。要在 Paint 設置的字體 ::: :::warning **Ex:** ```kotlin= val paint = Paint().apply { typeface = Typeface.SERIF typeface = Typeface.MONOSPACE } ``` :::