import android.content.Context;
import android.support.v4.view.MotionEventCompat;
import android.support.v4.widget.SlidingPaneLayout;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.ViewConfiguration;
/*
在使用侧滑菜单的时候如果主界面中有ViewPager的时候调用该自定义控件，避免二者的冲突事件的发生
*/
public class PageEnabledSlidingPaneLayout extends SlidingPaneLayout {
private float mInitialMotionX;
private float mInitialMotionY;
private float mEdgeSlop;//手滑动的距离
public PageEnabledSlidingPaneLayout(Context context) {
this(context, null);
}
public PageEnabledSlidingPaneLayout(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public PageEnabledSlidingPaneLayout(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
ViewConfiguration config = ViewConfiguration.get(context);
mEdgeSlop = config.getScaledEdgeSlop();//getScaledTouchSlop是一个距离
}
@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
switch (MotionEventCompat.getActionMasked(ev)) {
case MotionEvent.ACTION_DOWN: {
mInitialMotionX = ev.getX();
mInitialMotionY = ev.getY();
break;
}
case MotionEvent.ACTION_MOVE: {
final float x = ev.getX();
final float y = ev.getY();
// The user should always be able to "close" the pane, so we only check
// for child scrollability if the pane is currently closed.
if (mInitialMotionX > mEdgeSlop && !isOpen() && canScroll(this, false,
Math.round(x - mInitialMotionX), Math.round(x), Math.round(y))) {
// How do we set super.mIsUnableToDrag = true?
// send the parent a cancel event
MotionEvent cancelEvent = MotionEvent.obtain(ev);
cancelEvent.setAction(MotionEvent.ACTION_CANCEL);
return super.onInterceptTouchEvent(cancelEvent);
}
}
}
return super.onInterceptTouchEvent(ev);
}
}
