How to detect phone shaking in Android. Sample

Here is sample application which demonstrate shake detecting.

This sample application go into red when shake detected.

Please look youtube video.

package com.hrupin.sample.shakedetect;
 
import android.app.Activity;
import android.graphics.Color;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.os.Bundle;
import android.view.View;
import android.widget.RelativeLayout;
import android.widget.TextView;
 
import java.security.cert.CollectionCertStoreParameters;
 
 
public class MainActivity extends Activity implements SensorEventListener, View.OnClickListener {
 
    private long lastUpdate = -1;
    private float x, y, z;
    private float last_x, last_y, last_z;
    private static final int SHAKE_THRESHOLD = 800;
    private SensorManager sensorMgr;
    private RelativeLayout background;
    private TextView text;
    private boolean isShaked = false;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }
 
    @Override
    protected void onResume() {
        super.onResume();
        if(sensorMgr == null) {
            background = (RelativeLayout) findViewById(R.id.rlBackground);
            background.setOnClickListener(this);
            text = (TextView) findViewById(R.id.text);
            resetScreenUI();
 
            sensorMgr = (SensorManager) getSystemService(SENSOR_SERVICE);
            boolean accelSupported = sensorMgr.registerListener(this, sensorMgr.getDefaultSensor(Sensor.TYPE_ACCELEROMETER), SensorManager.SENSOR_DELAY_GAME);
 
            if (!accelSupported) {
                // on accelerometer on this device
                sensorMgr.unregisterListener(this, sensorMgr.getDefaultSensor(Sensor.TYPE_ACCELEROMETER));
            }
        }
    }
 
    @Override
    public void onSensorChanged(SensorEvent sensorEvent) {
        if (sensorEvent.sensor.getType() == Sensor.TYPE_ACCELEROMETER) {
            long curTime = System.currentTimeMillis();
            // only allow one update every 100ms.
            if ((curTime - lastUpdate) > 100) {
                long diffTime = (curTime - lastUpdate);
                lastUpdate = curTime;
 
                x = sensorEvent.values[0];
                y = sensorEvent.values[1];
                z = sensorEvent.values[2];
 
                float speed = Math.abs(x+y+z - last_x - last_y - last_z)
                        / diffTime * 10000;
                if (speed > SHAKE_THRESHOLD) {
                    // yes, this is a shake action! Do something about it!
                    isShaked = true;
                    background.setBackgroundColor(Color.RED);
                    text.setText("SHAKED!!! click for try again");
                    text.setTextColor(Color.YELLOW);
                }
                last_x = x;
                last_y = y;
                last_z = z;
            }
        }
    }
 
    @Override
    public void onAccuracyChanged(Sensor sensor, int i) {
 
    }
 
    protected void onPause() {
        if (sensorMgr != null) {
            sensorMgr.unregisterListener(this, sensorMgr.getDefaultSensor(Sensor.TYPE_ACCELEROMETER));
            sensorMgr = null;
            resetScreenUI();
        }
        super.onPause();
    }
 
    @Override
    public void onClick(View view) {
        if(isShaked){
            resetScreenUI();
        }
    }
 
    private void resetScreenUI() {
        background.setBackgroundColor(Color.WHITE);
        text.setText(R.string.shake_me);
        text.setTextColor(Color.RED);
    }
}

The full source code from Android project (Android Studio) is here: