How to animate the view by using the absolute coordinate mode and how to get its cachebitmap and move when the view is clicked

Layout:

<?xml version= "1.0" encoding= "UTF-8"? ><com.example.android_test. Mydraglayer xmlns:android= "http://schemas.android.com/apk/res/android"    android:id= "@+id/rootview    " Android:layout_width= "Fill_parent"    android:layout_height= "Fill_parent" > <com.example.android_test. Mylinearlayout     android:id= "@+id/linear"    android:layout_width= "fill_parent"    android:layout_height= " Fill_parent "></com.example.android_test. Mylinearlayout></com.example.android_test. Mydraglayer>

Mylinearlayout, with detailed notes

public class Mylinearlayout extends Relativelayout {private View mdragview;private Bitmap mdragbitmap = null;private int m    bitmapoffsetx;private int mbitmapoffsety;private Boolean mdragging = False;public Mydraglayer mDragLayer;    /** * X offset from where we touched on the cell to its upper-left corner */private float mtouchoffsetx;    /** * Y offset from where we touched on the cell to its upper-left corner */private float mtouchoffsety; Private static final float Drag_scale = 18.0f; Zoom in on how much private float mlastmotionx;private float mlastmotiony;private ImageView mview;public mylinearlayout (Context Context, AttributeSet Attrs) {Super (context, attrs); Inflate (context, r.layout.relative_ex, this); init (context);} private void init (context context) {Final int top = This.getresources (). Getdimensionpixelsize (r.dimen.top); final ImageView Image1 = (ImageView) Findviewbyid (R.ID.ITEM1); final ImageView image2 = (ImageView) Findviewbyid (R.ID.ITEM2); Final int x = 50;final INT y = top;mview = image2;final int switch_to_left = 50;//Click btn1 the Image1 will move to the left 50 of the screen button btn1 = (Button) findviewbyi D (R.ID.BTN1); Btn1.setonclicklistener (new View.onclicklistener () {@Overridepublic void OnClick (View v) {final mytranslateanimation ani = new Mytranslateanimation (Image1.getleft ()-Switch_to_left, 0, Image1.gettop ()-y, 0);//Trans Lateanimation (float Fromxdelta, float toxdelta, float//Fromydelta, float toydelta)//float Fromxdelta: This parameter represents the difference between the point at which the animation starts and the current view x-coordinate, or float toxdelta, which represents the difference between the point at which the animation ends and the current view x-coordinate;//If the view is in a (x, y) point then the animation is from point B (X+fromxdelta, Y +fromydelta) point to the c//Point (X+toxdelta,y+toydelta) point. ani.setduration, ani.dstx = Switch_to_left;ani.dsty = y;// Ani.setfillbefore (true); Ani.view = image1;//This causes the view to remain at the left switch_to_left of the distance ani.view.layout (ANI.DSTX, Ani.dsty, Ani.dstx + ani.view.getWidth (), Ani.dsty + ani.view.getHeight ()); Ani.setanimationlistener (new Animation.animationlistener () {public void Onanimationstart (Animation Animation) {}public void Onanimationrepeat (Animation Animation) {}public void Onanimationend (Animation Animation) {ani.view.setVisibility (view.visible);}}); Image1.setvisibility (view.invisible); Image1.startanimation (ANI);}); /Long press Mview to get its cache and move mview.setonlongclicklistener (new View.onlongclicklistener () {@Overridepublic Boolean Onlongclick (View v) {StartDrag (); return false;}}); @Overridepublic boolean onintercepttouchevent (motionevent ev) {//System.out.println ("onintercepttouchevent:" + ev); int action = Ev.getaction (), final float x = Ev.getx (), final float y = ev.gety (), if (action = = Motionevent.action_down) {ML Astmotionx = X;mlastmotiony = Y;requestfocus ();} if (mdragging) {return true;} return super.onintercepttouchevent (EV);} Class Mytranslateanimation extends Translateanimation {public int dstx;public int dsty;public View view;public Mytranslat Eanimation (float fromxdelta, float toxdelta,float fromydelta, float Toydelta) {super (Fromxdelta, Toxdelta, Fromydelta, Toydelta);}} public void StartDrag () {View view = mview;if (view!)= null) {Mdragview = View;mdragging = true;//itself This view is first placed as invisibleview.setvisibility (view.invisible); Rect r = new rect (); R.set (View.getscrollx (), view.getscrolly (), 0, 0);// Convert the coordinates of the view component to the same coordinate system offsetdescendantrecttomycoords (view, R);//mtouchoffsetx the position of the finger relative to the view Mtouchoffsetx = Mlastmotionx-r.left;mtouchoffsety = Mlastmotiony-r.top;view.clearfocus (); view.setpressed (false); Boolean Willnotcache = View.willnotcachedrawing (); view.setwillnotcachedrawing (false);//Reset the drawing cache background Color to fully transparent//for the duration of this operationint color = View.getdrawingcachebackgroundcolor (); view.setd Rawingcachebackgroundcolor (0);//If there is a cache then destroyif (color! = 0) {View.destroydrawingcache ();} Builddrawingcache after the Getdrawingcache can be taken to the view of the Bitmapview.builddrawingcache (); Bitmap Viewbitmap = View.getdrawingcache (); int width = viewbitmap.getwidth (); int height = viewbitmap.getheight (); Matrix scale = new matrix (), Float scalefactor = View.getwidth (); scalefactor = (Scalefactor + DRAg_scale)/Scalefactor;scale.setscale (Scalefactor, scalefactor); mdragbitmap = Bitmap.createbitmap (viewBitmap, 0, 0, width, Height,scale, true);//Here Destroy this cacheview.destroydrawingcache (); View.setwillnotcachedrawing (Willnotcache ); View.setdrawingcachebackgroundcolor (color); final Bitmap dragbitmap = Mdragbitmap;mbitmapoffsetx = ( Dragbitmap.getwidth ()-width)/2;mbitmapoffsety = (dragbitmap.getheight ()-height)/2;invalidate (); Mdraglayer.startdrag (Mdragbitmap, (int) (Mtouchoffsetx + mbitmapoffsetx), (int) (mtouchoffsety + mbitmapoffsety));}}}

Mydraglayer:

public class Mydraglayer extends Framelayout {/** * The bitmap it is currently being dragged */private bitmap Mdragbitma p = null;private float mlastmotionx;private float mlastmotiony;private float moffsetx;private float moffsety;private Pain T mdragpaint;private static final int transition_duration = 250;public Mydraglayer (context context, AttributeSet Attrs) {s Uper (context, attrs);} @Overridepublic boolean onintercepttouchevent (motionevent ev) {Mlastmotionx = Ev.getx (); mlastmotiony = Ev.gety (); int DX = 0;int dy = 0;invalidate (); Boolean result = Super.onintercepttouchevent (EV); return result;} @Overrideprotected void <strong>dispatchDraw</strong> (canvas canvas) {<strong>// This method can be acquired when the cache on the screen moves with the finger </strong>super.dispatchdraw (canvas); if (mdragbitmap! = NULL &&! Mdragbitmap.isrecycled ()) {//Draw actual icon being Draggedcanvas.drawbitmap (Mdragbitmap, GETSCROLLX () + mlastmotionx- Moffsetx, getscrolly () + Mlastmotiony-moffsety,mdragpaint);}} public void STARtdrag (Bitmap Bitmap, int offsetx, int offsety) {<strong>//This method passed in bitmap</strong>mdragbitmap = Bitmap; Moffsetx = Offsetx;moffsety = Offsety;mdragpaint = Null;invalidate ();}}