DrawerLayout 中listView 滑動不好控制（豎直滑動和水平方向滑動判斷）

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;
}
}