DrawerLayout 中listView 滑动不好控制（竖直滑动和水平方向滑动判断）

import android.content.Context;

import android.support.v4.widget.DrawerLayout;

import android.util.AttributeSet;

import android.view.MotionEvent;

import android.view.ViewConfiguration;

public class MyDrawerLayout extends DrawerLayout {

public MyDrawerLayout(Context context) {
this(context, null);
}

public MyDrawerLayout(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}

public MyDrawerLayout(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
final ViewConfiguration configuration = ViewConfiguration
.get(getContext());
mTouchSlop = configuration.getScaledTouchSlop();
}

private int mTouchSlop;
private float mLastMotionX;
private float mLastMotionY;

@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
try {
final float x = ev.getX();
final float y = ev.getY();

switch (ev.getAction()) {
case MotionEvent.ACTION_DOWN:
mLastMotionX = x;
mLastMotionY = y;
break;

case MotionEvent.ACTION_MOVE:
int xDiff = (int) Math.abs(x - mLastMotionX);
int yDiff = (int) Math.abs(y - mLastMotionY);
final int x_yDiff = xDiff * xDiff + yDiff * yDiff;

boolean xMoved = x_yDiff > mTouchSlop * mTouchSlop;

if (xMoved) {
if (xDiff > yDiff * 4) {
return true;
} else {
return false;
}
}
break;
default:
break;
}
return super.onInterceptTouchEvent(ev);
} catch (IllegalArgumentException ex) {
}
return false;
}

@Override
public boolean onTouchEvent(MotionEvent ev) {
try {
return super.onTouchEvent(ev);
} catch (IllegalArgumentException ex) {
}
return false;
}

}