I want my shake sensor to work.On shaking my android phone to make something happen, right now nothing happens when i shake my phone. My code is as below:
private SensorManager mSensorManager;
private float mAccel; // acceleration apart from gravity
private float mAccelCurrent; // current acceleration including gravity
private float mAccelLast; // last acceleration including gravity
and oncreate:
mSensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
mSensorManager.registerListener(mSensorListener, mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER), SensorManager.SENSOR_DELAY_NORMAL);
mAccel = 0.00f;
mAccelCurrent = SensorManager.GRAVITY_EARTH;
mAccelLast = SensorManager.GRAVITY_EARTH;
on acitvity
private final SensorEventListener mSensorListener = new SensorEventListener() {
public void onSensorChanged(SensorEvent se) {
float x = se.values[0];
float y = se.values[1];
float z = se.values[2];
mAccelLast = mAccelCurrent;
mAccelCurrent = FloatMath.sqrt(x*x + y*y + z*z);
float delta = mAccelCurrent - mAccelLast;
mAccel = mAccel * 0.9f + delta * 0.1f; // perform low-cut filter
}
public void onAccuracyChanged(Sensor sensor, int accuracy) {
if(mAccel > 0.1)
{
Toast toast = Toast.makeText(getApplicationContext(), "Device has shaken.", Toast.LENGTH_LONG); toast.show();
}
}
};
Hi Here i added sample source code for Shake Sensor .Please try this example. Hope it should helpful for you.Please let me know if you have any issues. Thanks.
main.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_above="@+id/footer"
android:padding="10dp"
android:background="#eaeae8" >
<TextView
android:id="@+id/txtSettings"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="10dp"
android:text="Enable and Disable the Sensor">
</TextView>
<TextView
android:id="@+id/label"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:padding="10dip"
android:textSize="16sp"
android:textStyle="bold" >
</TextView>
<RadioGroup
android:id="@+id/sensorSettings"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/txtSettings"
android:layout_below="@+id/txtSettings"
android:layout_marginTop="18dp" >
<RadioButton
android:id="@+id/enable"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Sensor Enable" />
<RadioButton
android:id="@+id/disable"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Sensor Disable" />
</RadioGroup>
</RelativeLayout>
SensorTestActivity.java
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.view.Window;
import android.view.WindowManager;
import android.widget.RadioGroup;
import android.widget.RadioGroup.OnCheckedChangeListener;
import android.widget.Toast;
public class SensorTestActivity extends Activity implements SensorEventListener {
private SensorManager sensorManager;
private boolean color = false;
private View view;
private long lastUpdate;
static boolean enableSensor = true;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.main);
view = findViewById(R.id.label);
view.setBackgroundColor(Color.GREEN);
sensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);
sensorManager.registerListener(this,
sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER),
SensorManager.SENSOR_DELAY_NORMAL);
lastUpdate = System.currentTimeMillis();
RadioGroup sensorSettings =(RadioGroup)findViewById(R.id.sensorSettings);
sensorSettings.setOnCheckedChangeListener(new OnCheckedChangeListener(){
@Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
// checkedId is the RadioButton selected
switch(checkedId) {
case R.id.enable:
enableSensor = true;
break;
case R.id.disable:
enableSensor = false;
break;
}
}
});
}
@Override
public void onSensorChanged(SensorEvent event) {
if (event.sensor.getType() == Sensor.TYPE_ACCELEROMETER) {
if(enableSensor){
getAccelerometer(event);
}
}
}
private void getAccelerometer(SensorEvent event) {
float[] values = event.values;
// Movement
float x = values[0];
float y = values[1];
float z = values[2];
float accelationSquareRoot = (x * x + y * y + z * z)
/ (SensorManager.GRAVITY_EARTH * SensorManager.GRAVITY_EARTH);
long actualTime = System.currentTimeMillis();
if (accelationSquareRoot >= 2) //
{
if (actualTime - lastUpdate < 200) {
return;
}
lastUpdate = actualTime;
Toast.makeText(this, "Device has shaken", Toast.LENGTH_SHORT)
.show();
if (color) {
view.setBackgroundColor(Color.GREEN);
} else {
view.setBackgroundColor(Color.RED);
}
color = !color;
}
}
@Override
public void onAccuracyChanged(Sensor sensor, int accuracy) {
}
@Override
protected void onResume() {
super.onResume();
// register this class as a listener for the orientation and
// accelerometer sensors
sensorManager.registerListener(this,
sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER),
SensorManager.SENSOR_DELAY_NORMAL);
}
@Override
protected void onPause() {
// unregister listener
super.onPause();
sensorManager.unregisterListener(this);
}
}
Please add the AndroidManifest permission.
<uses-permission android:name="android.permission.VIBRATE" />