样式效果
1、创建自定义GridView
/**
* 作者：created by meixi
* 邮箱：[email protected]
* 日期：2019/5/31 13
*/
public class DragGridView extends GridView {
/** 点击时候的X位置 */
public int downX;
/** 点击时候的Y位置 */
public int downY;
/** 点击时候对应整个界面的X位置 */
public int windowX;
/** 点击时候对应整个界面的Y位置 */
public int windowY;
/** VIEW相对自己的X */
private int win_view_x;
/**VIEW相对自己的Y*/
private int win_view_y;
/** 长按时候对应postion */
public int dragPosition;
/** Up后对应的ITEM的Position */
private int dropPosition;
/** 开始拖动的ITEM的Position*/
private int startPosition;
/** item高 */
private int itemHeight;
/** item宽 */
private int itemWidth;
/** 拖动的时候对应ITEM的VIEW */
private View dragImageView = null;
/** 长按的时候ITEM的VIEW*/
private ViewGroup dragItemView = null;
/** WindowManager管理器 */
private WindowManager windowManager = null;
/** */
private WindowManager.LayoutParams windowParams = null;
/** item总量*/
private int itemTotalCount;
/** 一行的ITEM数量*/
private int nColumns = 4;
/** 行数 */
private int nRows;
/** 剩余部分 */
private int Remainder;
/** 是否在移动 */
private boolean isMoving = false;
/** */
private int holdPosition;
/** 拖动的时候放大的倍数 */
private double dragScale = 1.2D;
/** 震动器 */
private Vibrator mVibrator;
/** 每个ITEM之间的水平间距 */
private int mHorizontalSpacing = 15;
/** 每个ITEM之间的竖直间距 */
private int mVerticalSpacing = 15;
/** 移动时候最后个动画的ID */
private String LastAnimationID;
public DragGridView(Context context) {
super(context);
init(context);
}
public DragGridView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
init(context);
}
public DragGridView(Context context, AttributeSet attrs) {
super(context, attrs);
init(context);
}
/**
* dip转为 px
*/
public int dip2px(Context context, float dipValue) {
final float scale = context.getResources().getDisplayMetrics().density;
return (int) (dipValue * scale + 0.5f);
}
public void init(Context context){
mVibrator = (Vibrator) context.getSystemService(Context.VIBRATOR_SERVICE);
//将布局文件中设置的间距dip转为px
mHorizontalSpacing = dip2px(context, mHorizontalSpacing);
}
/** 在ScrollView内，所以要进行计算高度 */
@Override
public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2,MeasureSpec.AT_MOST);
super.onMeasure(widthMeasureSpec, expandSpec);
}
@Override
public boolean dispatchTouchEvent(MotionEvent ev) {
if (ev.getAction() == MotionEvent.ACTION_DOWN) {
downX = (int) ev.getX();
downY = (int) ev.getY();
windowX = (int) ev.getX();
windowY = (int) ev.getY();
setOnItemClickListener(ev);
}
return super.dispatchTouchEvent(ev);
}
/** 停止拖动 ，释放并初始化 */
private void stopDrag() {
if (dragImageView != null) {
windowManager.removeView(dragImageView);
dragImageView = null;
}
}
/** 在拖动的情况更新View的位置 */
private void onDrag(int x, int y , int rawx , int rawy) {
if (dragImageView != null) {
windowParams.alpha = 0.6f;
windowParams.x = rawx - win_view_x;
windowParams.y = rawy - win_view_y;
windowManager.updateViewLayout(dragImageView, windowParams);
}
}
/**
*创建窗口对象、添加我们要移动的View
* @param dragBitmap
* @param x
* @param y
*/
public void startDrag(Bitmap dragBitmap, int x, int y) {
stopDrag();
windowParams = new WindowManager.LayoutParams();// 获取WINDOW界面的
//Gravity.TOP|Gravity.LEFT;这个必须加
windowParams.gravity = Gravity.TOP | Gravity.LEFT;
//得到要移动的View左上角相对于屏幕的坐标
windowParams.x = x - win_view_x;
windowParams.y = y - win_view_y;
//设置拖拽item的宽和高
windowParams.width = (int) (dragScale * dragBitmap.getWidth());// 放大dragScale倍，可以设置拖动后的倍数
windowParams.height = (int) (dragScale * dragBitmap.getHeight());// 放大dragScale倍，可以设置拖动后的倍数
this.windowParams.flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
| WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE
| WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON
| WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN;
this.windowParams.format = PixelFormat.TRANSLUCENT;
this.windowParams.windowAnimations = 0;
ImageView iv = new ImageView(getContext());
iv.setImageBitmap(dragBitmap);
windowManager = (WindowManager) getContext().getSystemService(Context.WINDOW_SERVICE);// "window"
windowManager.addView(iv, windowParams);
dragImageView = iv;
}
/** 隐藏 放下 的ITEM*/
private void hideDropItem() {
((DragAdapter) getAdapter()).setShowDropItem(false);
}
/** 在松手下放的情况，更新界面 */
private void onDrop(int x, int y) {
// 根据拖动到的x,y坐标获取拖动位置下方的ITEM对应的POSTION
int tempPostion = pointToPosition(x, y);
// if (tempPostion != AdapterView.INVALID_POSITION) {
dropPosition = tempPostion;
DragAdapter mDragAdapter = (DragAdapter) getAdapter();
//显示刚拖动的ITEM
mDragAdapter.setShowDropItem(true);
//刷新适配器，让对应的ITEM显示
mDragAdapter.notifyDataSetChanged();
// }
}
/**
* 长按点击监听
* @param ev
*/
public void setOnItemClickListener(final MotionEvent ev) {
setOnItemLongClickListener(new OnItemLongClickListener() {
@Override
public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) {
int x = (int) ev.getX();// 长按事件的X位置
int y = (int) ev.getY();// 长按事件的y位置
startPosition = position;// 第一次点击的postion
dragPosition = position;
if (startPosition <= 1) {//前2个默认不点击、可以设置
return false;
}
ViewGroup dragViewGroup = (ViewGroup) getChildAt(dragPosition - getFirstVisiblePosition());
TextView dragTextView = (TextView)dragViewGroup.findViewById(R.id.text_item);
dragTextView.setSelected(true);
dragTextView.setEnabled(false);
itemHeight = dragViewGroup.getHeight();
itemWidth = dragViewGroup.getWidth();
itemTotalCount = DragGridView.this.getCount();
// 如果特殊的这个不等于拖动的那个,并且不等于-1
if (dragPosition != AdapterView.INVALID_POSITION) {
// 释放的资源使用的绘图缓存。如果你调用buildDrawingCache()手动没有调用setDrawingCacheEnabled(真正的),你应该清理缓存使用这种方法。
win_view_x = windowX - dragViewGroup.getLeft();//VIEW相对自己的X，半斤
win_view_y = windowY - dragViewGroup.getTop();//VIEW相对自己的y，半斤
dragItemView = dragViewGroup;
dragViewGroup.destroyDrawingCache();
dragViewGroup.setDrawingCacheEnabled(true);
Bitmap dragBitmap = Bitmap.createBitmap(dragViewGroup.getDrawingCache());
mVibrator.vibrate(50);//设置震动时间
startDrag(dragBitmap, (int)ev.getRawX(), (int)ev.getRawY());
hideDropItem();
dragViewGroup.setVisibility(View.INVISIBLE);
isMoving = false;
return true;
}
return false;
}
});
}
@Override
public boolean onTouchEvent(MotionEvent ev) {
if (dragImageView != null && dragPosition != AdapterView.INVALID_POSITION) {
// 移动时候的对应x,y位置
int x = (int) ev.getX();
int y = (int) ev.getY();
switch (ev.getAction()) {
case MotionEvent.ACTION_DOWN:
downX = (int) ev.getX();
windowX = (int) ev.getX();
downY = (int) ev.getY();
windowY = (int) ev.getY();
break;
case MotionEvent.ACTION_MOVE:
onDrag(x, y ,(int) ev.getRawX() , (int) ev.getRawY());
if (!isMoving){
OnMove(x, y);
}
if (pointToPosition(x, y) != AdapterView.INVALID_POSITION){
break;
}
break;
case MotionEvent.ACTION_UP:
stopDrag();
onDrop(x, y);
requestDisallowInterceptTouchEvent(false);
break;
default:
break;
}
}
return super.onTouchEvent(ev);
}
/** 移动的时候触发，移动所有改变的Item*/
public void OnMove(int x, int y) {
// 拖动的VIEW下方的POSTION
int dPosition = pointToPosition(x, y);
// 判断下方的POSTION是否是最开始2个不能拖动的
if (dPosition > 1) {
if ((dPosition == -1) || (dPosition == dragPosition)){
return;
}
dropPosition = dPosition;
if (dragPosition != startPosition){
dragPosition = startPosition;
}
int movecount;
//拖动的=开始拖的，并且 拖动的 不等于放下的
if ((dragPosition == startPosition) || (dragPosition != dropPosition)){
//移需要移动的动ITEM数量
movecount = dropPosition - dragPosition;
}else{
//移需要移动的动ITEM数量为0
movecount = 0;
}
if(movecount == 0){
return;
}
int movecount_abs = Math.abs(movecount);
if (dPosition != dragPosition) {
//dragGroup设置为不可见
ViewGroup dragGroup = (ViewGroup) getChildAt(dragPosition);
dragGroup.setVisibility(View.INVISIBLE);
float to_x = 1;//移动的X偏移量
float to_y;// 移动的Y偏移量
//x_vlaue移动的距离百分比（相对于自己长度的百分比）
float x_vlaue = ((float) mHorizontalSpacing / (float) itemWidth) + 1.0f;
//y_vlaue移动的距离百分比（相对于自己宽度的百分比）
float y_vlaue = ((float) mVerticalSpacing / (float) itemHeight) + 1.0f;
Log.d("x_vlaue", "x_vlaue = " + x_vlaue);
for (int i = 0; i < movecount_abs; i++) {
to_x = x_vlaue;
to_y = y_vlaue;
//向右
if (movecount > 0) {
// 判断是不是同一行的
holdPosition = dragPosition + i + 1;
if (dragPosition / nColumns == holdPosition / nColumns) {
to_x = - x_vlaue;
to_y = 0;
} else if (holdPosition % 4 == 0) {
to_x = 3 * x_vlaue;
to_y = - y_vlaue;
} else {
to_x = - x_vlaue;
to_y = 0;
}
}else{
//向左,下移到上，右移到左
holdPosition = dragPosition - i - 1;
if (dragPosition / nColumns == holdPosition / nColumns) {
to_x = x_vlaue;
to_y = 0;
} else if((holdPosition + 1) % 4 == 0){
to_x = -3 * x_vlaue;
to_y = y_vlaue;
}else{
to_x = x_vlaue;
to_y = 0;
}
}
ViewGroup moveViewGroup = (ViewGroup) getChildAt(holdPosition);
Animation moveAnimation = getMoveAnimation(to_x, to_y);
moveViewGroup.startAnimation(moveAnimation);
//如果是最后一个移动的，那么设置他的最后个动画ID为LastAnimationID
if (holdPosition == dropPosition) {
LastAnimationID = moveAnimation.toString();
}
moveAnimation.setAnimationListener(new Animation.AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {
isMoving = true;
}
@Override
public void onAnimationRepeat(Animation animation) {
}
@Override
public void onAnimationEnd(Animation animation) {
// 如果为最后个动画结束，那执行下面的方法
if (animation.toString().equalsIgnoreCase(LastAnimationID)) {
DragAdapter mDragAdapter = (DragAdapter) getAdapter();
mDragAdapter.exchange(startPosition,dropPosition);
startPosition = dropPosition;
dragPosition = dropPosition;
isMoving = false;
}
}
});
}
}
}
}
/** 获取移动的动画 */
public Animation getMoveAnimation(float toXValue, float toYValue) {
TranslateAnimation mTranslateAnimation = new TranslateAnimation(
Animation.RELATIVE_TO_SELF, 0.0F,
Animation.RELATIVE_TO_SELF,toXValue,
Animation.RELATIVE_TO_SELF, 0.0F,
Animation.RELATIVE_TO_SELF, toYValue);// 当前位置移动到指定位置
mTranslateAnimation.setFillAfter(true);// 设置一个动画效果执行完毕后，View对象保留在终止的位置。
mTranslateAnimation.setDuration(300L);
return mTranslateAnimation;
}
}
2、activity实现
public class MainActivity extends AppCompatActivity implements AdapterView.OnItemClickListener {
private MyGridView mOtherGv;
private DragGridView mUserGv;
private List<String> mUserList = new ArrayList<>();
private List<String> mOtherList = new ArrayList<>();
private OtherAdapter mOtherAdapter;
private DragAdapter mUserAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initView();
}
public void initView() {
mUserGv = (DragGridView) findViewById(R.id.userGridView);
mOtherGv = (MyGridView) findViewById(R.id.otherGridView);
mUserList.add("推荐");
mUserList.add("热点");
mUserList.add("上海");
mUserList.add("时尚");
mUserList.add("科技");
mUserList.add("体育");
mUserList.add("军事");
mUserList.add("财经");
mUserList.add("网络");
mOtherList.add("汽车");
mOtherList.add("房产");
mOtherList.add("社会");
mOtherList.add("情感");
mOtherList.add("女人");
mOtherList.add("旅游");
mOtherList.add("健康");
mOtherList.add("美女");
mOtherList.add("游戏");
mOtherList.add("数码");
mOtherList.add("娱乐");
mOtherList.add("探索");
mUserAdapter = new DragAdapter(this, mUserList,true);
mOtherAdapter = new OtherAdapter(this, mOtherList,false);
mUserGv.setAdapter(mUserAdapter);
mOtherGv.setAdapter(mOtherAdapter);
mUserGv.setOnItemClickListener(this);
mOtherGv.setOnItemClickListener(this);
}demo云盘链接：https://pan.baidu.com/s/1iKAHJ3yrUeece1Yi1dsSEw
云盘密码交流：QQ1085220040
demo链接：https://download.csdn.net/download/meixi_android/11224016
