Android：双层嵌套ViewPager并添加单击事件
2024-10-08 21:32:43
仿网易新闻：
实现原理:
上面的导航栏是一个自定义的ViewGroup(类似ActionBar)
中间内容层是ViewPager套fragment实现左右切换滑动
fragment里面的布局是一个ListView 附带下拉刷新和下拉加载效果
HeadView是一个ViewPager
双层ViewPager如果处理子ViewPager的滑动冲突问题和点击事件
通过自定义子ViewPager的方法：
public class TeacherViewPager extends ViewPager implements OnGestureListener {
private GestureDetector mDetector;
public TeacherViewPager(Context context, AttributeSet attrs) {
super(context, attrs);
GestureDetector detector = new GestureDetector(context, this);
mDetector = detector;
}
public GestureDetector getGestureDetector() {
return mDetector;
}
@Override
public boolean onDown(MotionEvent e) {
return false;
}
@Override
public void onShowPress(MotionEvent e) {
}
@Override
public boolean onSingleTapUp(MotionEvent e) {
LogUtil.info("json", "onSingleTapUp");
if(listener != null) {
listener.setOnSimpleClickListenr(getCurrentItem());
}
return true;
}
@Override
public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX,
float distanceY) {
return false;
}
@Override
public void onLongPress(MotionEvent e) {
}
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
float velocityY) {
return false;
}
private onSimpleClickListener listener;
public interface onSimpleClickListener {
void setOnSimpleClickListenr(int position);
}
public void setOnSimpleClickListener(onSimpleClickListener listener) {
this.listener = listener;
}
}
onTouchEvent处理事件：
advPager.setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
advPager.getGestureDetector().onTouchEvent(event);
// TODO Auto-generated method stub
final float x = event.getRawX();
final float y = event.getRawY();
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
LogUtil.verbose("json", "ACTION_DOWN");
xDistance = yDistance = 0f;
mLastMotionX = x;
mLastMotionY = y;
case MotionEvent.ACTION_MOVE:
LogUtil.verbose("json", "ACTION_MOVE, x: " + x + ", y: " + y);
final float xDiff = Math.abs(x - mLastMotionX);
final float yDiff = Math.abs(y - mLastMotionY);
xDistance += xDiff;
yDistance += yDiff;
float dx = xDistance - yDistance;
LogUtil.info("json", "ACTION_MOVE dx= " + dx + ",xDistance: " + xDistance + ", yDistance: " + yDistance);
if (xDistance > yDistance || Math.abs(xDistance - yDistance) < 0.00001f) {
LogUtil.warn("json", "ACTION_MOVE interceptor.");
mIsBeingDragged = true;
mLastMotionX = x;
mLastMotionY = y;
((ViewParent) v.getParent()).requestDisallowInterceptTouchEvent(true);
} else {
mIsBeingDragged = false;
((ViewParent) v.getParent()).requestDisallowInterceptTouchEvent(false);
}
break;
case MotionEvent.ACTION_UP:
LogUtil.verbose("json", "ACTION_UP");
break;
case MotionEvent.ACTION_CANCEL:
LogUtil.verbose("json", "ACTION_CANCEL");
LogUtil.verbose("json", "mIsBeingDragged=" + mIsBeingDragged + " xDistance= " + xDistance + " y=" + yDistance);
if(mIsBeingDragged) {
((ViewParent) v.getParent()).requestDisallowInterceptTouchEvent(false);
}
break;
default:
break;
}
return false;
}
});
源码下载链接：http://files.cnblogs.com/gongcb/%E5%8E%8B%E7%BC%A9%E5%8C%85.zip
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