Sanjay Joshi Sanjay Joshi - 1 month ago 26
Android Question

Using proximity sensor in android

I want to use proximity sensor in my project. I searched for proximity sensor tutorial. And I found a sensor tutorial at http://www.vogella.com/articles/AndroidSensor/article.html#sensoroverview_manager. I tried to use proximity sensor as following code:

@Override
public void onSensorChanged(SensorEvent event)
{
if(event.sensor.getType() == Sensor.TYPE_PROXIMITY)
{
Toast.makeText(getApplicationContext(), "working", Toast.LENGTH_SHORT).show();
}
}


My
Activity
is implementing
SensorEventListener
. But its not working. Do I need to use any permission to use proximity sensor? Or My code is wrong for doing this stuff. Your help will be very appreciated. Thank you

Answer

I use this code:

import android.content.Context;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity implements SensorEventListener {

    private SensorManager mSensorManager;
    private Sensor mProximity;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);


        mSensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
        mProximity = mSensorManager.getDefaultSensor(Sensor.TYPE_PROXIMITY);

    }

    @Override
    protected void onResume() {
        super.onResume();
        mSensorManager.registerListener(this, mProximity, SensorManager.SENSOR_DELAY_NORMAL);
    }

    @Override
    protected void onPause() {
        super.onPause();
        mSensorManager.unregisterListener(this);
    }

    @Override
    public void onSensorChanged(SensorEvent event) {
        if (event.sensor.getType() == Sensor.TYPE_PROXIMITY) {
            if (event.values[0] >= -0.01 && event.values[0]<= 0.01) {
                //near
                Toast.makeText(getApplicationContext(), "near", Toast.LENGTH_SHORT).show();
            } else {
                //far
                Toast.makeText(getApplicationContext(), "far", Toast.LENGTH_SHORT).show();
            }
        }
    }

    @Override
    public void onAccuracyChanged(Sensor sensor, int accuracy) {

    }

}