package com.leafact.GridView; import android/203187.html">android.app.Activity; import android.content.Context; import android.graphics.Bitmap; import android.graphics.PixelFormat; import android.graphics.Rect; import android.os.Handler; import android.os.Vibrator; import android.util.AttributeSet; import android.view.Gravity; import android.view.MotionEvent; import android.view.View; import android.view.WindowManager; import android.widget.AdapterView; import android.widget.GridView; import android.widget.ImageView; import android.widget.Toast; /**  * 長(zhǎng)按能選中item的，丟入垃圾箱的gridView  *  * @author leafact  *  */ public class MoveGridView extends GridView {   private WindowManager mWindowManager;   /**    * item鏡像的布局參數(shù)    */   private WindowManager.LayoutParams mWindowLayoutParams;   /**    * 震動(dòng)器    */   private Vibrator mVibrator;   // 震動(dòng)的時(shí)間，默認(rèn)為100ms   private long vibratorMs = 100;   // 設(shè)置長(zhǎng)按時(shí)間為1秒   private long responseMS = 1000;   private static boolean isMove = false;   // 按下去的x,y   private int mDownX = 0;   private int mDownY = 0;   // 移動(dòng)的時(shí)候的x,y   private int mMoveX = 0;   private int mMoveY = 0;   // 抬起的x,y   private int mUpX = 0;   private int mUpY = 0;   private int mPoint2ItemTop;   private int mPoint2ItemLeft;   private int mOffset2Top;   private int mOffset2Left;   /**    * 狀態(tài)欄的高度    */   private int mStatusHeight;   public MoveGridView(Context context, AttributeSet attrs) {     super(context, attrs);     mVibrator = (Vibrator) context         .getSystemService(Context.VIBRATOR_SERVICE);     mWindowManager = (WindowManager) context         .getSystemService(Context.WINDOW_SERVICE);     mStatusHeight = getStatusHeight(context); // 獲取狀態(tài)欄的高度   }   // 要移動(dòng)的item的位置,默認(rèn)為INVALID_POSITION=-1   private int mMovePosition = INVALID_POSITION;   /**    * 剛開(kāi)始拖拽的item對(duì)應(yīng)的View    */   private View mStartMoveItemView = null;   private ImageView mMoveImageView = null;   private Bitmap mMoveBitmap;   private Handler mHandler = new Handler();   // 判斷是否能開(kāi)始移動(dòng)元素   private Runnable mLongClickRunnable = new Runnable() {     @Override     public void run() {       isMove = true;       mVibrator.vibrate(vibratorMs);       // 根據(jù)我們按下的點(diǎn)顯示item鏡像       createDragImage(mMoveBitmap, mDownX, mDownY);     }   };   @Override   public boolean onTouchEvent(MotionEvent ev) {     switch (ev.getAction()) {     case MotionEvent.ACTION_DOWN:       mDownX = (int) ev.getX();       mDownY = (int) ev.getY();       System.out.println("ACTION_DOWN");       // 根據(jù)按下的X,Y坐標(biāo)獲取所點(diǎn)擊item的position       mMovePosition = pointToPosition(mDownX, mDownY);       // 如果選中的為非法的位置。則不處理消息       if (mMovePosition == AdapterView.INVALID_POSITION) {         break;       }       mHandler.postDelayed(mLongClickRunnable, responseMS);       mStartMoveItemView = getChildAt(mMovePosition           - getFirstVisiblePosition());       mPoint2ItemTop = mDownY - mStartMoveItemView.getTop();       mPoint2ItemLeft = mDownX - mStartMoveItemView.getLeft();       mOffset2Top = (int) (ev.getRawY() - mDownY);       mOffset2Left = (int) (ev.getRawX() - mDownX);       // 開(kāi)啟mMoveItemView繪圖緩存       mStartMoveItemView.setDrawingCacheEnabled(true);       // 獲取mMoveItemView在緩存中的Bitmap對(duì)象       mMoveBitmap = Bitmap.createBitmap(mStartMoveItemView           .getDrawingCache());       // 這一步很關(guān)鍵，釋放繪圖緩存，避免出現(xiàn)重復(fù)的鏡像       mStartMoveItemView.destroyDrawingCache();       break;     case MotionEvent.ACTION_MOVE:       mMoveX = (int) ev.getX();       mMoveY = (int) ev.getY();       // 如果我們?cè)诎聪碌膇tem上面移動(dòng)，只要不超過(guò)item的邊界我們就不移除mRunnable       // 依然能監(jiān)聽(tīng)到longClick       if (!isTouchInItem(mStartMoveItemView, mMoveX, mMoveY)) {         mHandler.removeCallbacks(mLongClickRunnable);       }       // //禁止Gridview側(cè)邊進(jìn)行滑動(dòng),移動(dòng)的時(shí)候不許發(fā)生側(cè)滑事件       if (isMove) {         onDragItem(mMoveX, mMoveY);         return true;       }       break;     case MotionEvent.ACTION_UP:       mUpX = (int) ev.getX();       mUpY = (int) ev.getY();       mHandler.removeCallbacks(mLongClickRunnable);       if(isMove){         deleteIfNeed();       }       removeDragImage();       isMove = false;       break;     default:       break;     }     return super.onTouchEvent(ev);   }   /**    * 判斷是否要?jiǎng)h除，滿足條件刪除    */   private void deleteIfNeed() {     int y = mUpY - mPoint2ItemTop + mOffset2Top         - mStatusHeight;     if(y<50){       if(mUninstallListener!=null)       mUninstallListener.onUninstallListener(mMovePosition);     }   }   /**    * 是否點(diǎn)擊在GridView的item上面    *    * @param itemView    * @param x    * @param y    * @return    */   private boolean isTouchInItem(View dragView, int x, int y) {     if (dragView == null) {       return false;     }     int leftOffset = dragView.getLeft();     int topOffset = dragView.getTop();     if (x < leftOffset || x > leftOffset + dragView.getWidth()) {       return false;     }     if (y < topOffset || y > topOffset + dragView.getHeight()) {       return false;     }     return true;   }   /**    * 創(chuàng)建拖動(dòng)的鏡像    *    * @param bitmap    * @param downX    *      按下的點(diǎn)相對(duì)父控件的X坐標(biāo)    * @param downY    *      按下的點(diǎn)相對(duì)父控件的X坐標(biāo)    */   private void createDragImage(Bitmap bitmap, int downX, int downY) {     mWindowLayoutParams = new WindowManager.LayoutParams();     mWindowLayoutParams.format = PixelFormat.TRANSLUCENT; // 圖片之外的其他地方透明     mWindowLayoutParams.gravity = Gravity.TOP | Gravity.LEFT;     mWindowLayoutParams.x = downX - mPoint2ItemLeft + mOffset2Left;     mWindowLayoutParams.y = downY - mPoint2ItemTop + mOffset2Top         - mStatusHeight;     mWindowLayoutParams.alpha = 0.55f; // 透明度     mWindowLayoutParams.width = WindowManager.LayoutParams.WRAP_CONTENT;     mWindowLayoutParams.height = WindowManager.LayoutParams.WRAP_CONTENT;     mWindowLayoutParams.flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE         | WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE;     mMoveImageView = new ImageView(getContext());     mMoveImageView.setImageBitmap(bitmap);     mWindowManager.addView(mMoveImageView, mWindowLayoutParams);   }   /**    * 從界面上面移動(dòng)拖動(dòng)鏡像    */   private void removeDragImage() {     if (mMoveImageView != null) {       mWindowManager.removeView(mMoveImageView);       mMoveImageView = null;     }   }   /**    * 拖動(dòng)item，在里面實(shí)現(xiàn)了item鏡像的位置更新，item的相互交換以及GridView的自行滾動(dòng)    *    * @param x    * @param y    */   private void onDragItem(int moveX, int moveY) {     mWindowLayoutParams.x = moveX - mPoint2ItemLeft + mOffset2Left;     mWindowLayoutParams.y = moveY - mPoint2ItemTop + mOffset2Top         - mStatusHeight;     mWindowManager.updateViewLayout(mMoveImageView, mWindowLayoutParams); // 更新鏡像的位置   }   /**    * 獲取狀態(tài)欄的高度    *    * @param context    * @return    */   private static int getStatusHeight(Context context) {     int statusHeight = 0;     Rect localRect = new Rect();     ((Activity) context).getWindow().getDecorView()         .getWindowVisibleDisplayFrame(localRect);     statusHeight = localRect.top;     if (0 == statusHeight) {       Class<?> localClass;       try {         localClass = Class.forName("com.android.internal.R$dimen");         Object localObject = localClass.newInstance();         int i5 = Integer.parseInt(localClass             .getField("status_bar_height").get(localObject)             .toString());         statusHeight = context.getResources().getDimensionPixelSize(i5);       } catch (Exception e) {         e.printStackTrace();       }     }     return statusHeight;   }   /**    * 設(shè)置響應(yīng)拖拽的毫秒數(shù)，默認(rèn)是1000毫秒    *    * @param responseMS    */   public void setResponseMS(long responseMS) {     this.responseMS = responseMS;   }   /**    * 設(shè)置震動(dòng)時(shí)間的毫秒數(shù)，默認(rèn)是1000毫秒    *    * @param responseMS    */   public void setVibrator(long vibratorMs) {     this.vibratorMs = vibratorMs;   }   public void setOnUninstallListener(UninstallListener l){     mUninstallListener=l;   };   private UninstallListener mUninstallListener; } 

package com.example.gridviewmovedemo; import java.util.ArrayList; import java.util.HashMap; import android.app.Activity; import android.os.Bundle; import android.view.Menu; import android.view.View; import android.widget.AdapterView; import android.widget.AdapterView.OnItemLongClickListener; import android.widget.SimpleAdapter; import com.leafact.GridView.MoveGridView; import com.leafact.GridView.UninstallListener; public class MainActivity extends Activity {   private MoveGridView mMoveGridView;   @Override   protected void onCreate(Bundle savedInstanceState) {     super.onCreate(savedInstanceState);     setContentView(R.layout.activity_main);     mMoveGridView = (MoveGridView) findViewById(R.id.gridview);     final ArrayList<HashMap<String, Object>> lstImageItem = new ArrayList<HashMap<String, Object>>();     for (int i = 0; i < 10; i++) {       HashMap<String, Object> map = new HashMap<String, Object>();       map.put("ItemText", "NO." + String.valueOf(i));// 按序號(hào)做ItemText       lstImageItem.add(map);     }     final SimpleAdapter saImageItems = new SimpleAdapter(this,         lstImageItem,// 數(shù)據(jù)來(lái)源         R.layout.gridview_item,         // 動(dòng)態(tài)數(shù)組與ImageItem對(duì)應(yīng)的子項(xiàng)         new String[] { "ItemText" },         // ImageItem的XML文件里面的一個(gè)ImageView,兩個(gè)TextView ID         new int[] { R.id.ItemText });     // 添加并且顯示     mMoveGridView.setAdapter(saImageItems);     //監(jiān)聽(tīng)到卸載刪除數(shù)據(jù)     mMoveGridView.setOnUninstallListener(new UninstallListener() {       @Override       public void onUninstallListener(int position) {         lstImageItem.remove(position);         saImageItems.notifyDataSetChanged();       }     });   }   @Override   public boolean onCreateOptionsMenu(Menu menu) {     getMenuInflater().inflate(R.menu.main, menu);     return true;   } } 

package com.leafact.GridView; public interface UninstallListener {   void onUninstallListener(int position); } 

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"   xmlns:tools="http://schemas.android.com/tools"   android:layout_width="match_parent"   android:layout_height="match_parent"   android:background="#fff"   android:orientation="vertical"   tools:context=".MainActivity" >   <RelativeLayout     android:layout_width="fill_parent"     android:layout_height="100dip"     android:background="#ccc" >     <TextView       android:layout_width="wrap_content"       android:layout_height="fill_parent"       android:layout_centerHorizontal="true"       android:gravity="center"       android:text="卸載"       android:textColor="#fff"       android:textSize="28sp" />   </RelativeLayout>   <com.leafact.GridView.MoveGridView     android:id="@+id/gridview"     android:layout_width="fill_parent"     android:layout_height="fill_parent"     android:horizontalSpacing="5dip"     android:numColumns="3"     android:verticalSpacing="5dip" /> </LinearLayout> 

<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"   android:layout_width="fill_parent"   android:layout_height="wrap_content"   android:background="#2248DD" >   <TextView     android:id="@+id/ItemText"     android:layout_width="wrap_content"     android:layout_height="100dip"     android:layout_centerHorizontal="true"     android:gravity="center" >   </TextView> </RelativeLayout>