我有以下类代表可触摸的视图并绘制滑动条。ACTION_CANCEL同时触摸
public class SlideBar extends View {
private int progress;
private int max;
private Paint background;
private Paint upground;
private RectF bar;
private boolean firstDraw;
public SlideBar(Context context, AttributeSet attrs) {
super(context, attrs);
progress = 0;
upground = new Paint();
upground.setColor(Color.parseColor("#C2296C"));
background = new Paint();
background.setColor(Color.parseColor("#777777"));
}
private void onFirstDraw() {
max = getWidth();
bar = new RectF(0, 19, max, 21);
}
public void onDraw(Canvas canvas) {
if (!firstDraw) {
onFirstDraw();
progress = max;
firstDraw = true;
}
canvas.save();
canvas.drawRoundRect(bar, 5, 5, background);
canvas.drawCircle(progress, 20, 9, upground);
canvas.restore();
}
public void setValue(int value) {
progress = value;
}
public boolean onTouchEvent(MotionEvent evt) {
System.out.println(evt.getAction());
progress = (int) evt.getX();
invalidate();
return false;
}
}
但是触摸并拖动它的时候,我收到了ACTION_DOWN,一些ACTION_MOVEs然后收到ACTION_CANCEL并没有进一步的事件。
为什么会发生?我不想取消活动并使其保持拖动状态。
我意识到,添加该组件的成PopupWindow,我怎么能拦截事件,让所有的人这只是发生去它的孩子? – 2011-08-16 18:05:03
我意识到这是一个抓住我的事件的HorizontalScrollView。 – 2011-08-16 18:16:01
https://www.youtube.com/watch?v=EZAoJU-nUyI 这可能是有帮助的 – kouretinho 2015-07-29 07:38:56