基于SurfaceView的可拖动视频控件

概述视频播放控件（一） 可拖动，变换SurfaceView

视频播放控件（一） 可拖动，变换SurfaceVIEw

  1 public class DragSurfaceVIEw extends SurfaceVIEw implements VIEw.OntouchListener {  2     protected int screenWIDth;  3      screenHeight;  4      lastX;  5      lastY;  6     private  orileft;  7      oriRight;  8      oritop;  9      oriBottom; 10      dragDirection; 11     static final int top = 0x15; 12     int left = 0x16 13     int BottOM = 0x17 14     int RIGHT = 0x18 15     int left_top = 0x11 16     int RIGHT_top = 0x12 17     int left_BottOM = 0x13 18     int RIGHT_BottOM = 0x14 19     int CENTER = 0x19 20     int offset = 20 21  22     /** 23      * 初始化获取屏幕宽高 24      */ 25     voID initScreenW_H() { 26         screenHeight = getResources().getdisplayMetrics().heightPixels - 40 27         screenWIDth = getResources().getdisplayMetrics().wIDthPixels; 28         Log.i("DragVIEwTAG","DragSurfaceVIEw.initScreenW_H: screenWIDth="+screenWIDth+",screenHeight="+screenHeight); 29     } 30     public DragSurfaceVIEw(Context context) { 31         super(context); 32         setontouchListener(this); 33         initScreenW_H(); 34  35  36      DragSurfaceVIEw(Context context,AttributeSet attrs) { 37         (context,attrs); 38         setontouchListener( 39  40  41  42     public DragSurfaceVIEw(Context context,AttributeSet attrs, defStyleAttr) { 43          44         setontouchListener( 45  46  47  48  49     @OverrIDe 50     boolean ontouch(VIEw v,MotionEvent event) { 51         int action = event.getAction(); 52         if (action == MotionEvent.ACTION_DOWN) { 53             orileft = v.getleft(); 54             oriRight = v.getRight(); 55             oritop = v.gettop(); 56             oriBottom = v.getBottom(); 57             lastY = () event.getRawY(); 58             lastX = () event.getRawX(); 59             dragDirection = getDirection(v,() event.getX(), 60                     () event.getY()); 61         } 62         // 处理拖动事件 63         delDrag(v,event,action); 64         if(action==MotionEvent.ACTION_UP){ 65             dragDirection=0 66  67         invalIDate(); 68         return true 69  70  71  72      73      * 获取触摸点flag 74      * 75      * @param v 76  x 77  y 78 @return 79       80     int getDirection(VIEw v,1)">int x,1)"> y) { 81         int left = 82         int right = 83         int bottom = 84         int top = 85         if (x < 40 && y < 40) { 86             return left_top; 87  88         if (y < 40 && right - left - x < 40 89              RIGHT_top; 90  91         if (x < 40 && bottom - top - y < 40 92              left_BottOM; 93  94         if (right - left - x < 40 && bottom - top - y < 40 95              RIGHT_BottOM; 96  97         if (x < 40 98              left; 99 100         if (y < 40101              top;102 103         if (right - left - x < 40104              RIGHT;105 106         if (bottom - top - y < 40107              BottOM;108 109          CENTER;110 111 112     113      * 处理拖动事件114 115 116  event117  action118      119     voID delDrag(VIEw v,MotionEvent event,1)"> action) {120         switch (action) {121             case MotionEvent.ACTION_MOVE:122                 int dx = (int) event.getRawX() -123                 int dy = (int) event.getRawY() -124                  (dragDirection) {125                     case left:  左边缘126                         left(v,dx);127                         break128                     case RIGHT:  右边缘129                         right(v,1)">130                         131                     case BottOM:  下边缘132                         bottom(v,dy);133                         134                     case top:  上边缘135                         top(v,1)">136                         137                     case CENTER:  点击中心-->>移动138                         center(v,dx,1)">139                         140                     case left_BottOM:  左下141 142 143                         144                     case left_top:  左上145 146 147                         148                     case RIGHT_BottOM:  右下149 150 151                         152                     case RIGHT_top:  右上153 154 155                         156                     default:157                         158                 }159                 v.layout(orileft,oritop,oriRight,oriBottom);160                 if (dragDirection != CENTER) {161                     v.layout(orileft,1)">162                 }163                 lastX = (164                 lastY = (165                 Log.i("DragVIEwTAG","DragSurfaceVIEw.delDrag:ACTION_MOVE direction="+dragDirection+",left="+orileft+",top="+oritop+",right="+oriRight+",bottom="+oriBottom);166                 167              MotionEvent.ACTION_UP:168                 VIEwGroup.LayoutParams newLayoutParams = getNewLayoutParams();169                 if(newLayoutParams!=null){170                     Log.i("DragVIEwTAG","DragSurfaceVIEw.delDrag:ACTION_UP wIDth="+newLayoutParams.wIDth+",height="+newLayoutParams.height);171                     setLayoutParams(newLayoutParams);172                 }else {173                     Log.e("DragVIEwTAG","DragSurfaceVIEw.delDrag: 父组件类型？"174 175 176                 177             178                 179 180 181 182     private VIEwGroup.LayoutParams getNewLayoutParams(){183         if(getLayoutParams() instanceof relativeLayout.LayoutParams){184             relativeLayout.LayoutParams lp = (relativeLayout.LayoutParams)getLayoutParams( );185             lp.leftmargin =186             lp.topmargin =187             lp.wIDth = oriRight-orileft;188             lp.height = oriBottom-oritop;189              lp;190         }else  FrameLayout.LayoutParams) {191             FrameLayout.LayoutParams lp = (FrameLayout.LayoutParams) getLayoutParams();192             lp.leftmargin =193             lp.topmargin =194             lp.wIDth = oriRight -195             lp.height = oriBottom -196             197 198         199 200 201     202      * 触摸点为中心->>移动203 204 205  dx206  dy207      208     voID center(VIEw v,1)">int dx,1)"> dy) {209         orileft += dx;210         oritop += dy;211         oriRight +=212         oriBottom +=213         Log.i("DragVIEwTAG","DragSurfaceVIEw.center: v.left="+v.getleft()+",v.top="+v.gettop());214         if (orileft < -offset) {215             Log.e("DragVIEwTAG","DragSurfaceVIEw.center: 左侧越界,offset="+offset);216             orileft = -offset;217             oriRight = orileft + v.getWIDth();218 219         if (oriRight > screenWIDth + offset) {220             Log.e("DragVIEwTAG","DragSurfaceVIEw.center: 右侧越界,screenWIDth="+screenWIDth+",1)">221             oriRight = screenWIDth + offset;222             orileft = oriRight -223 224         if (oritop < -225             Log.e("DragVIEwTAG","DragSurfaceVIEw.center: 顶部越界,1)">226             oritop = -227             oriBottom = oritop + v.getHeight();228 229         if (oriBottom > screenHeight +230             Log.e("DragVIEwTAG","DragSurfaceVIEw.center: 底部越界,bottom="+oriBottom+",screenHeight="+screenHeight+",1)">231             oriBottom = screenHeight +232             oritop = oriBottom -233 234         v.layout(left,top,right,bottom);235 236 237 238     239      * 触摸点为上边缘240 241 242 243      244     voID top(VIEw v,1)">245         oritop +=246         247             oritop = -248 249         if (oriBottom - oritop - 2 * offset < 200250             oritop = oriBottom - 2 * offset - 200251 252 253 254     255      * 触摸点为下边缘256 257 258 259      260     voID bottom(VIEw v,1)">261         oriBottom +=262         263             oriBottom = screenHeight +264 265         266             oriBottom = 200 + oritop + 2 *267 268 269 270     271      * 触摸点为右边缘272 273 274 275      276     voID right(VIEw v,1)"> dx) {277         oriRight +=278         279             oriRight = screenWIDth +280 281         if (oriRight - orileft - 2 * offset < 200282             oriRight = orileft + 2 * offset + 200283 284 285 286     287      * 触摸点为左边缘288 289 290 291      292     voID left(VIEw v,1)">293         orileft +=294         295             orileft = -296 297         298             orileft = oriRight - 2 * offset - 200299 300 301 302     303      * 获取截取宽度304 305 306      307      getCutWIDth() {308         return getWIDth() - 2 *309 310 311     312      * 获取截取高度313 314 315      316      getCutHeight() {317         return getHeight() - 2 *318 319 }

 

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