android-location-rotation-effect

   @Override
   public void onSensorChanged(SensorEvent event) {
       if (System.currentTimeMillis() - lastTime < TIME_SENSOR) {
           return;
       }
       switch (event.sensor.getType()) {
           case Sensor.TYPE_ORIENTATION: {
               float x = event.values[0];
               x += getScreenRotationOnPhone(mContext);
               x %= 360.0F;
               if (x > 180.0F)
                   x -= 360.0F;
               else if (x < -180.0F)
                   x += 360.0F;

               if (Math.abs(mAngle - x) < 3.0f) {
                   break;
               }
               mAngle = Float.isNaN(x) ? 0 : x;
               if (mMarker != null) {
                   mMarker.setRotateAngle(360 - mAngle);
               }
               lastTime = System.currentTimeMillis();
           }
       }

   }

    /**
     * 获取当前屏幕旋转角度
     *
     * @param context
     * @return 0表示是竖屏; 90表示是左横屏; 180表示是反向竖屏; 270表示是右横屏
     */
    public static int getScreenRotationOnPhone(Context context) {
        final Display display = ((WindowManager) context
                .getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay();

        switch (display.getRotation()) {
            case Surface.ROTATION_0:
                return 0;

            case Surface.ROTATION_90:
                return 90;

            case Surface.ROTATION_180:
                return 180;

            case Surface.ROTATION_270:
                return -90;
        }
        return 0;
    }

            if (!mFirstFix) {
                mFirstFix = true;
                addCircle(location, amapLocation.getAccuracy());//添加定位精度圆
                addMarker(location);//添加定位图标
                mSensorHelper.setCurrentMarker(mLocMarker);//定位图标旋转
                aMap.moveCamera(CameraUpdateFactory.newLatLngZoom(location,18));
            } else {
                mCircle.setCenter(location);
                mCircle.setRadius(amapLocation.getAccuracy());
                mLocMarker.setPosition(location);
                aMap.moveCamera(CameraUpdateFactory.changeLatLng(location));
            }