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29. @Override
30. protected void onResume() {
31. mgr.registerListener(this, accelerometer, SensorManager.SENSOR_DELAY_UI);
32. super.onResume();
33. }
34.
35. @Override
36. protected void onPause() {
37. mgr.unregisterListener(this, accelerometer);
38. super.onPause();
39. }
40.
41. public void onAccuracyChanged(Sensor sensor, int accuracy) {
42. }
43.
44. public void onSensorChanged(SensorEvent event) {
45. for(int i=0; i<3; i++) {
46. gravity [i] = (float) (0.1 * event.values[i] + 0.9 * gravity[i]);
47. motion[i] = event.values[i] - gravity[i];
48. }
49. ratio = gravity[1]/SensorManager.GRAVITY_EARTH;
50. if(ratio > 1.0) ratio = 1.0;
51. if(ratio < -1.0) ratio = -1.0;
52. mAngle = Math.toDegrees(Math.acos(ratio));
53. if(gravity[2] < 0) {
54. mAngle = -mAngle;
55. }
56. if(counter++ % 10 == 0) {
57. String msg = String.format(
58. "Raw values\nX: %8.4f\nY: %8.4f\nZ: %8.4f\n" +
59. "Gravity\nX: %8.4f\nY: %8.4f\nZ: %8.4f\n" +
60. "Motion\nX: %8.4f\nY: %8.4f\nZ: %8.4f\nAngle: %8.1f",
61. event.values[0], event.values[1], event.values[2],
62. gravity[0], gravity[1], gravity[2],
63. motion[0], motion[1], motion[2],
64. mAngle);
65. text.setText(msg);
66. text.invalidate();
67. counter=1;
68. }
69. }
70.}
