Android实现拖拽GridView到目标View

[java] 
package cn.com.weather.serviceDemo.view; 
 
import cn.com.weather.serviceDemo.inte易做图ces.OnDropListener; 
import cn.com.weather.serviceDemo.util.DeviceUtil; 
import android.content.Context; 
import android.graphics.Bitmap; 
import android.graphics.Matrix; 
import android.graphics.PixelFormat; 
import android.util.AttributeSet; 
import android.view.Gravity; 
import android.view.MotionEvent; 
import android.view.View; 
import android.view.ViewGroup; 
import android.view.WindowManager; 
import android.widget.AdapterView; 
import android.widget.GridView; 
import android.widget.ImageView; 
 
public class MyGridView extends GridView{ 
     
    private ImageView dragImageView; 
    private WindowManager windowManager; 
    private WindowManager.LayoutParams windowParams; 
     
    private int dragSrcPosition;//开始拖拽项 
    private int dragPosition; 
     
    //移动的位置 
    private int dragPointX; 
    private int dragPointY; 
    //当前位置距离边界的位置 
    private int dragOffsetX; 
    private int dragOffsetY; 
     
    private View myView;//目标view 
    private int dropPosition = -1;//选中项 
     
    private OnDropListener onDropListener; 
 
    public MyGridView(Context context, AttributeSet attrs) { 
        super(context, attrs); 
    } 
     
    public void setView(View view){ 
        myView = view; 
    } 
     
    public void setOnDropListener(OnDropListener onDropListener){ 
        this.onDropListener = onDropListener; 
    } 
     
    private boolean setOnItemLongClickListener(final MotionEvent ev){ 
        this.setOnItemLongClickListener(new OnItemLongClickListener() { 
 
            @Override 
            public boolean onItemLongClick(AdapterView<?> parent, View view, 
                    int position, long id) { 
                final int x = (int)ev.getX();//触摸点相对于GridView的坐标  
                final int y = (int)ev.getY(); 
                 
                dragSrcPosition = dragPosition = position; 
                 
                if(dragPosition == AdapterView.INVALID_POSITION ){ 
                    return false; 
                } 
                 
                final ViewGroup item = (ViewGroup)getChildAt(dragPosition - getFirstVisiblePosition()); 
                 
                dragPointX = x - item.getLeft(); 
                dragPointY = y - item.getTop(); 
                dragOffsetX = (int)ev.getRawX() - x; 
                dragOffsetY = (int)ev.getRawY() - y; 
                 
                item.destroyDrawingCache();//清除cache 
                item.setDrawingCacheEnabled(true); 
                Bitmap bitmap = Bitmap.createBitmap(item.getDrawingCache()); 
                startDrag(getScaleBitmap(bitmap), x, y); 
                DeviceUtil.Vibrate(getContext(), 100); 
                return false; 
            } 
        }); 
         
        return super.onInterceptTouchEvent(ev); 
    } 
 
    @Override 
    public boolean onInterceptTouchEvent(MotionEvent ev) { 
        if(ev.getAction() == MotionEvent.ACTION_DOWN){ 
            return setOnItemLongClickListener(ev); 
        } 
        return super.onInterceptTouchEvent(ev); 
    } 
     
    @Override 
    public boolean onTouchEvent(MotionEvent ev) { 
        if(dragImageView != null && dragPosition != AdapterView.INVALID_POSITION){ 
            int x = (int)ev.getX(); 
            int y = (int)ev.getY(); 
            switch (ev.getAction()) { 
            case MotionEvent.ACTION_UP: 
                stopDrag(); 
            &n

补充：移动开发 , Android ,