ShapeScrim.java 文件源码

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

  if (attrs != null) {
    TypedArray typedArray = context.getTheme().obtainStyledAttributes(attrs, R.styleable.ShapeScrim, 0, 0);
    String     shapeName  = typedArray.getString(R.styleable.ShapeScrim_shape);

    if      ("square".equalsIgnoreCase(shapeName)) this.shape = ShapeType.SQUARE;
    else if ("circle".equalsIgnoreCase(shapeName)) this.shape = ShapeType.CIRCLE;
    else                                           this.shape = ShapeType.SQUARE;

    this.radius = typedArray.getFloat(R.styleable.ShapeScrim_radius, 0.4f);

    typedArray.recycle();
  } else {
    this.shape  = ShapeType.SQUARE;
    this.radius = 0.4f;
  }

  this.eraser = new Paint();
  this.eraser.setColor(0xFFFFFFFF);
  this.eraser.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.CLEAR));
}