Android "Shake" code implementation

Core interface code:

Package com. hyxf. main;

Import android. content. Context;
Import android. hardware. Sensor;
Import android. hardware. SensorEvent;
Import android. hardware. SensorEventListener;
Import android. hardware. SensorManager;
Import android. util. Log;

Public class ShakeListener implements SensorEventListener {

String TAG = "ShakeListener ";
// Speed threshold, which is effective when the shaking speed reaches this value
Private static final int SPEED_SHRESHOLD = 3000;
// Interval between two checks
Private static final int UPTATE_INTERVAL_TIME = 70;
// Sensor Manager
Private SensorManager sensorManager;
// Sensor
Private Sensor sensor;
// Gravity sensor listener
Private OnShakeListener onShakeListener;
// Context
Private Context mContext;
// Gravity-sensing coordinate at the last position on the mobile phone
Private float lastX;
Private float lastY;
Private float lati;
// Last detection time
Private long lastUpdateTime;
// Constructor
Public ShakeListener (Context c ){
// Obtain the listener object
MContext = c;
Start ();
}
// Start
Public void start (){
// Obtain the sensor Manager
SensorManager = (SensorManager) mContext
. GetSystemService (Context. SENSOR_SERVICE );
If (sensorManager! = Null ){
// Obtain the gravity Sensor
Sensor = sensorManager. getdefasensensor (Sensor. TYPE_ACCELEROMETER );
}
// Register
If (sensor! = Null ){
SensorManager. registerListener (this, sensor,
SensorManager. SENSOR_DELAY_GAME );
}
}
// Stop Detection
Public void stop (){
SensorManager. unregisterListener (this );
}
// Set the gravity sensor listener
Public void setOnShakeListener (OnShakeListener listener ){
OnShakeListener = listener;
}
// The gravity sensor senses the change data.
Public void onSensorChanged (SensorEvent event ){
// Current detection time
Long currentUpdateTime = System. currentTimeMillis ();
// Interval between two checks
Long timeInterval = currentUpdateTime-lastUpdateTime;
// Determine whether the detection interval has been reached
If (timeInterval <UPTATE_INTERVAL_TIME)
Return;
// The current time is changed to the last time
LastUpdateTime = currentUpdateTime;
// Obtain the coordinates of x, y, and z.
Float x = event. values [0];
Float y = event. values [1];
Float z = event. values [2];
// Obtain the variation values of x, y, and z.
Float deltaX = x-lastX;
Float deltaY = y-lastY;
Float deltaZ = z-lati;
// Convert the current coordinates to the last coordinates.
LastX = x;
LastY = y;
Las-1 = z;
Double speed = Math. sqrt (deltaX * deltaX + deltaY * deltaY + deltaZ
* DeltaZ)
/TimeInterval * 10000;
Log. v (TAG, "============= log ====================== ");
// Reach the speed threshold and send a prompt
If (speed> = SPEED_SHRESHOLD ){
OnShakeListener. onShake ();
}
}
Public void onAccuracyChanged (Sensor sensor, int accuracy ){
}
// Shake listener Interface
Public interface OnShakeListener {
Public void onShake ();
}
}

Application code:

Public class yaoAcitivity extends Activity {
ShakeListener mShakeListener = null;
Private TextView TV;
Private ImageView iv;
@ Override
Protected void onCreate (Bundle savedInstanceState ){
// TODO Auto-generated method stub
Super. onCreate (savedInstanceState );

This. setContentView (R. layout. main );
 
TV = (TextView) this. findViewById (R. id. textView1 );
Iv = (ImageView) this. findViewById (R. id. imageView1 );
 
MShakeListener = new ShakeListener (this );
MShakeListener. setOnShakeListener (new shakeLitener ());
}
Private class shakeLitener implements OnShakeListener {

@ Override
Public void onShake (){
// TODO Auto-generated method stub
TV. setText ("Shake it! ");
Iv. setImageResource (R. drawable. attitude_laugh );
MShakeListener. stop ();
}
 
}
}