实例代码(1)

  1 package com.threew;
  2 
  3 import android.content.Context;
  4 import android.graphics.Bitmap;
  5 import android.graphics.BitmapFactory;
  6 import android.graphics.Canvas;
  7 import android.graphics.Color;
  8 import android.graphics.Paint;
  9 import android.graphics.Rect;
 10 import android.graphics.RectF;
 11 import android.util.AttributeSet;
 12 import android.view.GestureDetector;
 13 import android.view.MotionEvent;
 14 import android.view.View;
 15 import android.view.GestureDetector.SimpleOnGestureListener;
 16 import android.view.View.OnTouchListener;
 17 import android.widget.Toast;
 18 
 19 /**
 20  * 
 21  * @Title: Mwedgit.java 
 22  * @author Rubert
 23  * @date 2014-8-20 AM 11:24:17 
 24  * @version V1.0 
 25  */
 26 public class MWedgit extends View implements OnTouchListener{
 27     
 28     private GestureDetector detector;//手势运动委托器
 29 
 30     private GestureAction gestureAction ;
 31     
 32     private OnBitmapClickListener mOnClickListener;
 33     
 34     private Rect mRect = null;
 35     
 36     private Context mContext = null;
 37     
 38     
 39     public MWedgit(Context context) {
 40         super(context, null);
 41         init(context);
 42     }
 43     
 44     public MWedgit(Context context, AttributeSet attrs) {
 45         super(context, attrs);
 46         init(context);
 47     }
 48     
 49     public void init(Context context) {
 50         mContext = context;
 51         gestureAction = GestureAction.GESTURE_DEFAULT;
 52         setOnTouchListener(this);
 53         detector = new GestureDetector(context,new MyGestureListener());
 54         setLongClickable(true);
 55     }
 56                        
 57     
 58     
 59     
 60     @Override
 61     protected void onDraw(Canvas canvas) {
 62         super.onDraw(canvas);
 63         Paint pt = new Paint();
 64         pt.setStyle(Paint.Style.FILL_AND_STROKE);
 65         pt.setColor(Color.YELLOW);
 66         Bitmap mBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher);
 67         mRect = new Rect(0, 0, mBitmap.getWidth(), mBitmap.getHeight());
 68         canvas.drawBitmap(mBitmap, mRect, new RectF(mRect), pt);
 69     }
 70     
 71     
 72     @Override
 73     public boolean onTouch(View v, MotionEvent e) {
 74         detector.onTouchEvent(e);
 75         if(e.getAction() == MotionEvent.ACTION_UP)
 76         {
 77             if(gestureAction == GestureAction.GESTURE_NONE)
 78             {
 79                 //TODO
 80             }
 81             if(gestureAction == GestureAction.GESTURE_TOUCH)
 82             {
 83                 mOnClickListener.onClick();
 84             }
 85         }
 86         return false;
 87     }
 88     
 89     
 90     class MyGestureListener extends SimpleOnGestureListener {
 91         
 92         //用户按下触摸屏，尚未松开或拖动，由一个MotionEvent.ACTION_DOWN触发.
 93         //注意和onDown的区别，强调的是没有松开或者拖动的状态
 94         @Override
 95         public void onShowPress(MotionEvent arg0)
 96         {
 97             super.onShowPress(arg0);
 98         }
 99         //用户按下触摸屏，由一个MotionEvent.ACTION_DOWN触发
100         @Override
101         public boolean onDown(MotionEvent e) {
102             
103             if(mRect != null && mRect.contains((int)e.getX(), (int)e.getY())) {
104                 gestureAction = GestureAction.GESTURE_TOUCH;
105             }
106             return super.onDown(e);
107         }
108         //用户(用户按下触摸屏后)松开，由MotionEvent.ACTION_UP触发
109         //如果在onDown和onFling之中2选1，那么使用这个事件是可以区分的
110         @Override
111         public boolean onSingleTapUp(MotionEvent arg0)
112         {
113             return false;
114         }
115         //长按 多个ACTION_DOWN触发
116         @Override
117         public void onLongPress(MotionEvent arg0)
118         {
119             super.onLongPress(arg0);
120         }
121         //用户按下触摸屏，快速移动后松开，由一个MotionEvent.ACTION_DOWN,多个ACTION_MOVE,一个ACTION_UP触发.
122         //velocityX和velocityY分别表示在X和Y方向上移动的速度
123         //e1 第一个Down，e2最后一个move
124         @Override
125         public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY)
126         {
127             //向左,速度每秒>200个像素
128             if( (e1.getX()-e2.getX() > getWidth()/2) && (Math.abs(velocityX)) > 200)
129             {
130                 gestureAction = GestureAction.GESTURE_LEFT;
131                 Toast.makeText(mContext, "向左", Toast.LENGTH_SHORT).show();
132             }
133             //向右,速度每秒>200个像素
134             else if( (e2.getX()-e1.getX() > getWidth()/2) && (Math.abs(velocityX)) > 200)
135             {
136                 gestureAction = GestureAction.GESTURE_RIGHT;
137                 Toast.makeText(mContext, "向右", Toast.LENGTH_SHORT).show();
138             } 
139             else if((e1.getY()-e2.getY() > getHeight()/2) && (Math.abs(velocityY)) > 200) 
140             {
141                 gestureAction = GestureAction.GESTURE_TOP;
142                 Toast.makeText(mContext, "向上", Toast.LENGTH_SHORT).show();
143             }
144             else if((e2.getY()-e1.getY() > getHeight()/2) && (Math.abs(velocityY)) > 200) 
145             {
146                 gestureAction = GestureAction.GESTURE_DOWN;
147                 Toast.makeText(mContext, "向下", Toast.LENGTH_SHORT).show();
148             }
149             return false;
150         }
151         //按下屏幕，并拖动，一个DOWM,多个MOVE触发
152         //e1 第一个Down，e2当前移动的point
153         //distance表示Scroll过程中的移动的像素。distanceX >0 表示向左，distanceY >0 表示向上，两个都大就是左上
154         @Override
155         public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX,float distanceY)
156         {
157             //向右
158             /*if(e2.getX() - e1.getX() > getWidth()/2)
159             {
160                 gestureAction = GestureAction.GESTURE_RIGHT;
161                 Toast.makeText(mContext, "向右", Toast.LENGTH_SHORT).show();
162             }
163             //向左
164             else if(e1.getX() - e2.getX() > getWidth()/2)
165             {
166                 gestureAction = GestureAction.GESTURE_LEFT;
167                 Toast.makeText(mContext, "向左", Toast.LENGTH_SHORT).show();
168             }
169             else if(e2.getY() - e1.getY() > getHeight()/2) 
170             {
171                 gestureAction = GestureAction.GESTURE_DOWN;
172                 Toast.makeText(mContext, "向下", Toast.LENGTH_SHORT).show();
173             }
174             else if(e1.getY() - e2.getY() > getHeight()/2) 
175             {
176                 gestureAction = GestureAction.GESTURE_TOP;
177                 Toast.makeText(mContext, "向上", Toast.LENGTH_SHORT).show();
178             }*/
179             return false;
180         }
181     }
182     
183     public void setOnClickListener(OnBitmapClickListener mOnClickListener) {
184         this.mOnClickListener = mOnClickListener;
185     }
186     
187     enum GestureAction
188     {
189         GESTURE_DEFAULT,
190         GESTURE_NONE,
191         GESTURE_TOUCH,
192         GESTURE_LEFT,
193         GESTURE_RIGHT,
194         GESTURE_TOP,
195         GESTURE_DOWN
196     }
197     
198     
199     public interface OnBitmapClickListener{
200         void onClick();
201     }
202     
203 }