Android仿网易新闻图片详情下滑隐藏效果示例代码

前言

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效果图：

实例代码

 public class InfoTextView extends AutoRelativeLayout {
 private Context context;
 private int lastY;
 private int offY;
 private int MIN_HEIGHT = 600;
 public InfoTextView(Context context) {
  super(context);
  this.context = context;
  init();
 }

 public InfoTextView(Context context, AttributeSet attrs) {
  super(context, attrs);
  this.context = context;
  init();
 }

 public InfoTextView(Context context, AttributeSet attrs, int defStyle) {
  super(context, attrs, defStyle);
  this.context = context;
  init();
 }

 private void init() {
  View root = inflate(context, R.layout.ad_detail_text_layout, this);
 }

 @Override
 public boolean onInterceptTouchEvent(MotionEvent ev) {
  return true;
 }

 @Override
 public boolean onTouchEvent(MotionEvent event) {
  return true;
 }
 @Override
 public boolean dispatchTouchEvent(MotionEvent ev) {
  boolean isConsume = false;
  int y = (int) ev.getY();
  switch (ev.getAction()) {
  case MotionEvent.ACTION_DOWN:
   isConsume = true;
   lastY = y;
   break;
  case MotionEvent.ACTION_MOVE:
   offY = y - lastY;
   int[] screenSize = ScreenUtils.getScreenSize(context, false);
   if (getTop() >= (screenSize[1] - MIN_HEIGHT)) {

   break;

   }

 //  Log.d("yzk", "y " + y + " getTop " + getTop()

 //   + " getBottom " + getBottom()

 //   + " screenSize[1] - getMeasuredHeight " + (screenSize[1] - getMeasuredHeight())

 //   + " screenSize[1] - MIN_HEIGHT " + (screenSize[1] - MIN_HEIGHT));

   if ((offY > 0 && getTop() < screenSize[1] - MIN_HEIGHT)

    || offY < 0 && getTop() > screenSize[1] - getMeasuredHeight()) {

   layout(getLeft(), getTop() + offY,

    getRight(), getBottom() + offY);
   }
   break;
  case MotionEvent.ACTION_UP:
   break;
  }
  return isConsume || super.dispatchTouchEvent(ev);
 }
 }

总结

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