Android: onshake with password screen

I am implementing a sensoreventlistener.

Whenever the device is shaked I want to provide a password screen.

I need some suggestion on how to implement it. What I am doing is I am inflateing password layout in onShake method can I do that?

The password layout should look like general passcode lock we used in devices..(giving 4 digits)

Any suggestions will be appreciated.

Below is my ShakeListener Activity

public   class ShakeListenerTestActivity extends Activity 
  private ShakeListener mShaker;
  private EditText password;

  public void onCreate(Bundle savedInstanceState)

    mShaker = new ShakeListener(this);
    mShaker.setOnShakeListener(new ShakeListener.OnShakeListener () {
      public void onShake()

   Toast.makeText(ShakeListenerTestActivity.this, password.getText(),




  public void onResume()

  public void onPause()


Yes logically speaking you should be able to inflate a layout in OnShake method , or you could even start a activity containing the password view. In onShake method just start a new activity which contains the password view and then based on the input from user you can decide what to do next !


How to detect shake event with android?

Have a look at that & you will find how to detect a shake so after detecting a shake you just need to start a new Activity 🙂

Let me know if you need more help

Edit 2:

Some code snippets how i think it will work :

public class ShakeActivity extends Activity implements SensorListener

sensorMgr = (SensorManager) getSystemService(SENSOR_SERVICE);


public void onSensorChanged(int sensor, float[] values) {
if (sensor == SensorManager.SENSOR_ACCELEROMETER) {
long curTime = System.currentTimeMillis();
// only allow one update every 100ms.
if ((curTime - lastUpdate) > 100) {
long diffTime = (curTime - lastUpdate);
lastUpdate = curTime;

x = values[SensorManager.DATA_X];
y = values[SensorManager.DATA_Y];
z = values[SensorManager.DATA_Z];

float speed = Math.abs(x+y+z – last_x – last_y – last_z) / diffTime * 10000;

if (speed > SHAKE_THRESHOLD) {
Log.d(”sensor”, “shake detected w/ speed: ” + speed);
Toast.makeText(this, “shake detected w/ speed: ” + speed, Toast.LENGTH_SHORT).show();
Intent i = new Intent(this, newActivity.class);
last_x = x;
last_y = y;
last_z = z;

That should solve your problem ! Also register the second activity in the Manifest. Hope this helps!

Also almost the entire code above was from Here , so thanks to original poster !

Source: stackoverflow
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