Android 利用重力感應監聽 來電時翻轉手機后靜音

在CallNotifier.java中 加入如下代碼：

        public void GetSensorManager(Context context) {  
            sm = (SensorManager) context  
                    .getSystemService(Service.SENSOR_SERVICE);  
            sensor = sm.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);  
            mySensorListener = new SensorEventListener() {  
                @Override  
                public void onSensorChanged(SensorEvent event) {  
                    x = event.values[0];   
                    y = event.values[1];   
                    z = event.values[2];  

                    if (x < 1 && x > -1 && y < 1 && y > -1) {  

                        if (z > 0) {  
                            mGoUp = true;  

                        } else {  

                            mGoUp = false;  
                        }  

                    } else {  
    //                  if (x > 1 || x < -1 || y > 1 || y < -1 ) {  

                            if ( z > 0 && !mGoUp ) {  
                                mRinger.stopRing();  
                                if(mySensorListener != null){  
                                    sm.unregisterListener(mySensorListener);    //Add by kylin 2013.07.25  

                                }  
                            }   
                            if ( z < 0 && mGoUp ) {  
                                mRinger.stopRing();  
                                if(mySensorListener != null){  
                                    sm.unregisterListener(mySensorListener);    //Add by kylin 2013.07.25  
                                }  
                            }   


    //                  }   

                    }  

                }  


                @Override  
                public void onAccuracyChanged(Sensor sensor, int accuracy) {  
                    // TODO Auto-generated method stub  

                }  
            };  
            sm.registerListener(mySensorListener, sensor,  
                    SensorManager.SENSOR_DELAY_GAME);  

        }  

    public class ShakeListener implements SensorEventListener {  
        public static ShakeListener sensor1;  
        // 速度閾值，當搖晃速度達到這值后產生作用  
        private static final int SPEED_SHRESHOLD = 400;  
        // 兩次檢測的時間間隔  
        private static final int UPTATE_INTERVAL_TIME = 70;  

        // 傳感器管理器  
        private SensorManager sensorManager;  
        // 傳感器  
        private Sensor sensor;  
        // 重力感應監聽器  
        private OnShakeListener onShakeListener;  
        // 上下文  
        private static Context context;  
        // 手機上一個位置時重力感應坐標  
        private float lastX;  
        private float lastY;  
        private float lastZ;  

        // 上次檢測時間  
        private long lastUpdateTime;  




        public static ShakeListener newInstance(Context c) {  
            if (sensor1 == null) {  
                sensor1 = new ShakeListener();  
                context = c;  
                return sensor1;  
            } else {  
                return sensor1;  
            }  
        }  

        // 開始  
        public void start() {  
            // 獲得傳感器管理器  
            if(sensorManager==null){  
                sensorManager = (SensorManager) context  
                .getSystemService(Context.SENSOR_SERVICE);    
            }  
            if (sensorManager != null&&sensor==null) {  
                // 獲得重力傳感器  
                sensor = sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);  
            }  
            if (sensor != null) {  
                sensorManager.registerListener(this, sensor,  
                        SensorManager.SENSOR_DELAY_NORMAL);  
            }  
        }  



        // 停止檢測  
        public void stop() {  
            sensorManager.unregisterListener(this);  
        }  

        // 搖晃監聽接口  
        public interface OnShakeListener {  
            public void onShake();  
        }  

        // 設置重力感應監聽器  
        public void setOnShakeListener(OnShakeListener listener) {  
            onShakeListener = listener;  
        }  

        // 重力感應器感應獲得變化數據  
        @Override  
        public void onSensorChanged(SensorEvent event) {  

            long currentUpdateTime = System.currentTimeMillis();  
            // 兩次檢測的時間間隔  
            long timeInterval = currentUpdateTime - lastUpdateTime;  
            // 判斷是否達到了檢測時間間隔  
            if (timeInterval < UPTATE_INTERVAL_TIME) {  
                return;  
            }  
            // 現在的時間變成last時間  
            lastUpdateTime = currentUpdateTime;  

            // 獲得x,y,z坐標  
            float x = event.values[0];  
            float y = event.values[1];  
            float z = event.values[2];  

            // 獲得x,y,z的變化值  
            float deltaX = x - lastX;  
            float deltaY = y - lastY;  
            float deltaZ = z - lastZ;  

            // 將現在的坐標變成last坐標  
            lastX = x;  
            lastY = y;  
            lastZ = z;  

            double speed = Math.sqrt(deltaX * deltaX + deltaY * deltaY + deltaZ  
                    * deltaZ)  
                    / timeInterval * 10000;  
            // 達到速度閥值，發出提示  
            if (speed >= SPEED_SHRESHOLD){  
                // 手機晃動  
                onShakeListener.onShake();  
            }  
        }  
        public void onAccuracyChanged(Sensor sensor, int accuracy) {  

        }  

    }