android開發(fā)PathEffect問題處理

發(fā)布時間：2020-08-20 14:24:02 來源：腳本之家閱讀：144 作者：laozhang 欄目：移動開發(fā)

我要畫出一塊由不規(guī)則path組成的區(qū)域，并且這個path因為視覺效果需要設置圓角，我就通過Paint.setPathEffect(new CornerPathEffect(300)); 給設置了圓角，但是在通過這個path組合成區(qū)域的時候因為這個圓角的設置整個區(qū)域都有圓角的效果了，這不是我想要的。

如圖，黑色是我的path，紅色是我設置了圓角的由path組成的區(qū)域。四個角落都有了圓角的效果，這不是我想要的。

而藍色區(qū)域是未設置圓角的，此時path一側(cè)的區(qū)域就不符合標準了。

以下是我的全部代碼

public class PathEffectView extends View {

  private Path line;
  private Paint linePaint;


  private Path range;
  private Paint rangePaint;
  private final Paint paint3;

  public PathEffectView(Context context, @Nullable AttributeSet attrs) {
    super(context, attrs);

    linePaint = new Paint(Paint.ANTI_ALIAS_FLAG);

    linePaint.setStrokeWidth(10);
    linePaint.setColor(Color.BLACK);
    linePaint.setStyle(Paint.Style.STROKE);
    linePaint.setPathEffect(new CornerPathEffect(300));

    rangePaint = new Paint(linePaint);

    rangePaint.setColor(Color.BLUE);
    rangePaint.setStyle(Paint.Style.FILL);


    paint3 = new Paint(linePaint);
    paint3.setColor(Color.RED);

  }

  @Override
  protected void onSizeChanged(int w, int h, int oldw, int oldh) {
    super.onSizeChanged(w, h, oldw, oldh);

    line = new Path();
    range = new Path();

    line.moveTo(0,1000);
    line.rLineTo(200,-150);
    line.rLineTo(200,300);
    line.rLineTo(200,-350);
    line.rLineTo(200,320);
    line.rLineTo(200,-370);
    line.lineTo(w,800);


    range.addPath(line);
    range.lineTo(w,h);
    rangePaint.setPathEffect(null);
    range.lineTo(0,h);
    range.close();
  }

  @Override
  protected void onDraw(Canvas canvas) {
    super.onDraw(canvas);
    canvas.save();
    canvas.translate(0,-20);
    canvas.drawPath(line, linePaint);
    canvas.restore();


    canvas.drawPath(range, rangePaint);
    canvas.drawPath(range,paint3);
  }
}

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android開發(fā)PathEffect問題處理

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