android:MotionEvent

mTouchListener = new OnTouchListener() {			
			@Override
			public boolean onTouch(View v, MotionEvent event) {
				// TODO Auto-generated method stub
				float x = event.getXPrecision()*event.getX()+event.getX();
				float y = event.getYPrecision()*event.getY()+event.getY();
				switch (event.getAction()) {
				case MotionEvent.ACTION_DOWN:

					break;
				case MotionEvent.ACTION_MOVE:
					mTouchTimes++;
					if (mTouchTimes > TOUCH_TIMES) {
//						根据方向计算角度
						if (mCurrentOrientation==DeviceOrientation.Landscape) {
							mAngle = Math.toDegrees(Math.atan2(y - 480 / 2, x))+90;
						} else {
							mAngle = -Math.toDegrees(Math.atan2(y - 480 / 2, 320-x))+90;
						}
						
						Log.w("angle", "mangle:"+mAngle);
					}
					break;
				case MotionEvent.ACTION_UP:
					if (mTouchTimes > TOUCH_TIMES) {

					} else {
						
					}
					mTouchTimes = 0;
					break;
				default:
					break;
				}
				return true;
			}
		};		
mView.setOnTouchListener(mTouchListener);