Android如何繪制發光效果詳解

前言

之前在看別人寫自定義view作繪制的時候，看到別人家的view自帶發光效果，看起來也是蠻炫酷的，于是自己也抽出時間來試用一下，這里做了一個模仿太陽的各種狀態樣式。

先上效果先上效果：

實現方式：

public BlurMaskFilter(float radius, Blur style) {

實現是使用的Paint類的setMaskFilter()方法，傳入BlurMaskFilter對象實現高斯模糊發光。

float radius 設置模糊半徑 Blur style 設置發光樣式，包括 Blur.INNER(內發光)，Blur.NORMAL(內外發光) Blur.SOLID(外發光)，Blur.OUTER(僅外發光可見)

貼上代碼

public class MaskFilterView extends View { private Paint lightPaint; private int centerX, centerY; /** 發光范圍 */ private int radioRadius = 70; public MaskFilterView(Context context) { super(context); init(); } public MaskFilterView(Context context, @Nullable AttributeSet attrs) { super(context, attrs); init(); } private void init() { lightPaint = new Paint(); setLayerType(LAYER_TYPE_SOFTWARE, null); lightPaint.setColor(Color.parseColor('#EC3E3E')); lightPaint.setMaskFilter(new BlurMaskFilter(radioRadius, BlurMaskFilter.Blur.INNER)); } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { centerX = getLeft() + getMeasuredWidth()/2; centerY = getTop() + getMeasuredHeight()/2; super.onMeasure(widthMeasureSpec, widthMeasureSpec); } public void setBlurType(int blurType) { switch (blurType) { case 0: lightPaint.setMaskFilter(new BlurMaskFilter(radioRadius, BlurMaskFilter.Blur.INNER)); break; case 1: lightPaint.setMaskFilter(new BlurMaskFilter(radioRadius, BlurMaskFilter.Blur.NORMAL)); break; case 2: lightPaint.setMaskFilter(new BlurMaskFilter(radioRadius, BlurMaskFilter.Blur.SOLID)); break; case 3: lightPaint.setMaskFilter(new BlurMaskFilter(radioRadius, BlurMaskFilter.Blur.OUTER)); break; } invalidate(); } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); canvas.drawCircle(centerX, centerY, 150, lightPaint); }}

總結

到此這篇關于Android如何繪制發光效果的文章就介紹到這了,更多相關Android繪制發光效果內容請搜索好吧啦網以前的文章或繼續瀏覽下面的相關文章希望大家以后多多支持好吧啦網！