Android通过摇晃手机的频率来控制声音的频率
通过晃动手机的频率来修改播放声音的频率。效果很给力的说。主要通过sensor来算手机摇晃的频率，摇晃的频率越高，播放声音的速度越快。
1 /**
2 * @author Stay
3 * 通过摇晃手机的频率来改变声音的速度
4 */
5 public class ShakeSound extends Activity implements SensorEventListener,OnClickListener {
6 private static final float SHAKE_THRESHOLD = 50;
7 private static final String TAG = "ActivityTest";
8 private SensorManager manager;
9 private SoundManager sm;
10 private long curTime, lastUpdate;
11 private float last_x, last_y, last_z;
12 private float x,y,z;
13 private boolean isPlaying;
14 private int count = -2;
15 private float force;
16 private int audioCount = 0;
17 private float audioForce;
18 private Button btn;
19
20 @Override
21 protected void onCreate(Bundle savedInstanceState) {
22 super.onCreate(savedInstanceState);
23 setContentView(R.layout.main);
24 btn = (Button) this.findViewById(R.id.hello);
25 btn.setOnClickListener(this);
26 manager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
27 sm = new SoundManager(this);
28 sm.addSound(1, "heixiu.ogg");
29 }
30
31 @Override
32 public void onSensorChanged(SensorEvent event) {
33 curTime = System.currentTimeMillis();
34 if ((curTime - lastUpdate) > 100) {
35 count ++ ;
36 if (count < 0) {
37 return;
38 }
39 if (count == 0) {
40 if (!isPlaying) {
41 Log.i(TAG, "sm.play(1, 0, 1.0f);");
42 sm.play(1, 0, 1.0f);
43 }
44 last_x = event.values[SensorManager.DATA_X];
45 last_y = event.values[SensorManager.DATA_Y];
46 last_z = event.values[SensorManager.DATA_Z];
47 return;
48 }
49 lastUpdate = curTime;
50 x = event.values[SensorManager.DATA_X];
51 y = event.values[SensorManager.DATA_Y];
52 z = event.values[SensorManager.DATA_Z];
53 curTime = System.currentTimeMillis();
54 // 每100毫秒检测一次
55 float deltaForce = Math.abs(x + y + z - last_x - last_y - last_z);
56 force = force + deltaForce;
57 updateAudioRate(deltaForce);
58 if (count >= SHAKE_THRESHOLD) {
59 Log.i(TAG, "unSensorListener");
60 // onShakeCallBack(force / count); get the score
61 unSensorListener();
62 if (isPlaying) {
63 sm.stop();
64 isPlaying = false;
65 }
66 count = - 2;
67 force = 0;
68 return;
69 }
70 last_x = x;
71 last_y = y;
72 last_z = z;
73 }
74 }
75
76
77 @Override
78 public void onAccuracyChanged(Sensor sensor, int accuracy) {
79 }
80
81 private void updateAudioRate(float force) {
82 float rat
补充：移动开发 , Android ,
