CODEWITHSUNDEEP
javaandroidandroid-studioandroid-sensors
Jonas Meeuws
Jonas Meeuws

Reputation: 58

Sensor change doesn't trigger onSensorChanged

I just started out on android and java yesterday, and i'm having a problem. I'm trying to output a sensor's values to some TextViews. The text updates, but with the values set at definition. onSensorChanged should update these values right?

import [...]

public class MainActivity extends Activity implements SensorEventListener {

    public float[] gravity = {0,0,0};

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

        final TextView gravxTxtView = (TextView) findViewById(R.id.gravxTxtView);
        final TextView gravyTxtView = (TextView) findViewById(R.id.gravyTxtView);
        final TextView gravzTxtview = (TextView) findViewById(R.id.gravzTxtView);

        final Handler handler = new Handler();
        handler.postDelayed(
                new Runnable() {
            @Override
            public void run() {
                gravxTxtView.setText("Gravity x: " + Float.toString((gravity[0])));
                gravyTxtView.setText("Gravity y: " + Float.toString((gravity[1])));
                gravzTxtview.setText("Gravity z: " + Float.toString((gravity[2])));
            }
        }, 500);
    }

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

    @Override
    public void onSensorChanged(SensorEvent event) {
        if(event.sensor.getType() == Sensor.TYPE_ACCELEROMETER){
            gravity[0] = event.values[0];
            gravity[1] = event.values[1];
            gravity[2] = event.values[2];
        }
    }
}

Upvotes: 1

Views: 3156

Answers (1)

Pranoy Sarkar
Pranoy Sarkar

Reputation: 2233

There are some serious steps you are missing 1. Get the instance of sensor manager 

SensorManager sensorManager=(SensorManager)getSystemService(SENSOR_SERVICE);

2. Get the instance of the sensor

Sensor accel=sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);

3. Register sensor to the lister class which implements SensorEventListener in your case you have implemented on the MainActivity so it will be this

sensorManager.registerListener(this, accel, SensorManager.SENSOR_DELAY_NORMAL);

now when certain change will happen it will call the onSensorChanged method ,please let me know its working or not

Upvotes: 3

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