465_画出部分透明的蒙版

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画出部分透明的蒙版

public class PartialTransparentView extends View {

private Paint paint;
private Paint whitePaint;
private int screenWidth;
private int screenHeight;
private int dp1;
private int dp2;
private int dp3;
private int dp4;
private int dp5;
private int dp6;
private int dp7;
private int dp8;
private int dp9;
private int dp10;
private int dp11;
private int dp12;
private int dp20;
private int dp23;

//1.椭圆
//2.条形
//3.圆角矩形
private int type = 1;

public PartialTransparentView(Context context) {
super(context);
initView(context);
}

public PartialTransparentView(Context context, AttributeSet attrs) {
super(context, attrs);
initView(context);
TypedArray ta = context.obtainStyledAttributes(attrs, R.styleable.PartialTransparentView);

type = ta.getInteger(R.styleable.PartialTransparentView_type, 1);

ta.recycle();
}

public PartialTransparentView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
initView(context);

}

private void initView(Context context) {
paint = new Paint(Paint.ANTI_ALIAS_FLAG);
paint.setColor(context.getResources().getColor(R.color.color_single_99000000));

whitePaint = new Paint(Paint.ANTI_ALIAS_FLAG);
whitePaint.setColor(Color.WHITE);
whitePaint.setMaskFilter(new BlurMaskFilter(5, BlurMaskFilter.Blur.NORMAL));
whitePaint.setStyle(Paint.Style.STROKE);
whitePaint.setStrokeWidth(5);

screenWidth = DensityUtil.getScreenWidth(context);
screenHeight = DensityUtil.getScreenHeight(context);

dp1 = DensityUtil.dip2px(context, 60);
dp2 = DensityUtil.dip2px(context, 380);
dp4 = DensityUtil.dip2px(context, 540);

dp5 = DensityUtil.dip2px(context, 6);
dp6 = DensityUtil.dip2px(context, 2);
dp7 = DensityUtil.dip2px(context, 180);
dp8 = DensityUtil.dip2px(context, 48);

dp9 = DensityUtil.dip2px(context, 12);
dp10 = DensityUtil.dip2px(context, 300);
dp11 = DensityUtil.dip2px(context, 180);
dp12 = DensityUtil.dip2px(context, 430);

dp20 = DensityUtil.dip2px(context, 20);
dp23 = DensityUtil.dip2px(context, 23);

}

@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);

int layerId = canvas.saveLayer(0, 0, screenWidth, screenHeight, null, Canvas.ALL_SAVE_FLAG);
canvas.drawRect(0, 0, screenWidth, screenHeight, paint);
paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.CLEAR));

if (type == 1) {

RectF localRectF = new RectF(
dp1,
dp2,
screenWidth - dp1,
dp4);
canvas.drawOval(localRectF, paint);
paint.setXfermode(null);
canvas.restoreToCount(layerId);
canvas.drawOval(localRectF, whitePaint);

} else if (type == 2) {

RectF localRectF = new RectF(
dp5,
dp6,
dp7,
dp8);
canvas.drawRoundRect(localRectF, dp23, dp23, paint);
paint.setXfermode(null);
canvas.restoreToCount(layerId);
canvas.drawRoundRect(localRectF, dp23, dp23, whitePaint);

} else if (type == 3) {

RectF localRectF = new RectF(
dp9,
dp10,
dp11,
dp12);
canvas.drawRoundRect(localRectF, dp20, dp20, paint);
paint.setXfermode(null);
canvas.restoreToCount(layerId);
canvas.drawRoundRect(localRectF, dp20, dp20, whitePaint);

} else if (type == 4) {

RectF localRectF = new RectF(
dp5,
dp6,
screenWidth - dp5,
dp8);
canvas.drawRoundRect(localRectF, dp20, dp20, paint);
paint.setXfermode(null);
canvas.restoreToCount(layerId);
canvas.drawRoundRect(localRectF, dp20, dp20, whitePaint);

}
}

public void setType(int type) {
this.type = type;
invalidate();
}
}

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