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我有一個自定義的線性佈局,我從中擴展。我已經調用setWIllNotCacheDrawing,但它不會工作。這裏是我的類:Android onDraw從來沒有叫
public class ClippedLinearLayout extends LinearLayout {
public ClippedLinearLayout(Context context) {
super(context);
this.setWillNotCacheDrawing(false);
}
public ClippedLinearLayout(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
this.setWillNotCacheDrawing(false);
}
public ClippedLinearLayout(Context context, AttributeSet attrs) {
super(context, attrs);
this.setWillNotCacheDrawing(false);
}
@Override
protected void onDraw(Canvas canvas) {
Log.e("clipped?", "clipped?);
Path mPath = new Path();
mPath.addCircle(50, 50, 50, Path.Direction.CCW);
canvas.clipPath(mPath, Region.Op.INTERSECT);
super.onDraw(canvas);
}
}
重寫'draw(Canvas)'或'dispatchDraw(Canvas)',一定要調用'super(canvas)'' – pskink