我有以下類代表可觸摸的視圖並繪製滑動條。ACTION_CANCEL同時觸摸
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;
}
}
但是觸摸並拖動它的時候,我收到了ACTION_DOWN,一些ACTION_MOVEs然後收到ACTION_CANCEL並沒有進一步的事件。
爲什麼會發生?我不想取消活動並使其保持拖動狀態。
我意識到,添加該組件的成PopupWindow,我怎麼能攔截事件,讓所有的人這只是發生去它的孩子? – 2011-08-16 18:05:03
我意識到這是一個抓住我的事件的HorizontalScrollView。 – 2011-08-16 18:16:01
https://www.youtube.com/watch?v=EZAoJU-nUyI 這可能是有幫助的 – kouretinho 2015-07-29 07:38:56