CODEWITHSUNDEEP
javaandroidandroid-sensors
ahew
ahew

Reputation: 116

Android Sensor Upright Rotation

I know there are threads about this, and I have been reading them for days.

I think my issue is more specific. I'm trying to get the device rotationaround the y-axis.

If i'm correct, it is called azimuth

When I run the app, it returns 0.0 in logcat after debug logging values[0], values[1], & values[2]

Code:

mSensorManager = (SensorManager)getSystemService(SENSOR_SERVICE);
        accelerometer = mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
        magnetometer = mSensorManager.getDefaultSensor(Sensor.TYPE_MAGNETIC_FIELD);

        SensorEventListener SEL = new SensorEventListener() {
            @Override
            public void onSensorChanged(SensorEvent event) {

                mSensorManager.getRotationMatrix(rotationMatrix, I, gravity, geomagnetic);

                mSensorManager.getOrientation(rotationMatrix, values);

                accy = values[0];

                System.out.println(accy);
            }

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

            }
        };

        int rate = SensorManager.SENSOR_DELAY_GAME;
        mSensorManager.registerListener(SEL, accelerometer, rate);
        mSensorManager.registerListener(SEL, magnetometer, rate);

Logcat:

09-05 17:34:02.622    6421-6421/com.ahewdev.eataround I/System.out﹕ 0.0
09-05 17:34:02.642    6421-6421/com.ahewdev.eataround I/System.out﹕ 0.0
09-05 17:34:02.642    6421-6421/com.ahewdev.eataround I/System.out﹕ 0.0
09-05 17:34:02.662    6421-6421/com.ahewdev.eataround I/System.out﹕ 0.0
09-05 17:34:02.662    6421-6421/com.ahewdev.eataround I/System.out﹕ 0.0
09-05 17:34:02.682    6421-6421/com.ahewdev.eataround I/System.out﹕ 0.0
09-05 17:34:02.682    6421-6421/com.ahewdev.eataround I/System.out﹕ 0.0
09-05 17:34:02.702    6421-6421/com.ahewdev.eataround I/System.out﹕ 0.0
09-05 17:34:02.702    6421-6421/com.ahewdev.eataround I/System.out﹕ 0.0
09-05 17:34:02.722    6421-6421/com.ahewdev.eataround I/System.out﹕ 0.0
09-05 17:34:02.722    6421-6421/com.ahewdev.eataround I/System.out﹕ 0.0
09-05 17:34:02.742    6421-6421/com.ahewdev.eataround I/System.out﹕ 0.0
09-05 17:34:02.742    6421-6421/com.ahewdev.eataround I/System.out﹕ 0.0
09-05 17:34:02.762    6421-6421/com.ahewdev.eataround I/System.out﹕ 0.0
09-05 17:34:02.762    6421-6421/com.ahewdev.eataround I/System.out﹕ 0.0
09-05 17:34:02.782    6421-6421/com.ahewdev.eataround I/System.out﹕ 0.0
09-05 17:34:02.782    6421-6421/com.ahewdev.eataround I/System.out﹕ 0.0
09-05 17:34:02.802    6421-6421/com.ahewdev.eataround I/System.out﹕ 0.0
09-05 17:34:02.802    6421-6421/com.ahewdev.eataround I/System.out﹕ 0.0

Upvotes: 0

Views: 81

Answers (1)

Hoan Nguyen
Hoan Nguyen

Reputation: 18151

From the code above the parameters gravity and geomagnetic in mSensorManager.getRotationMatrix(rotationMatrix, I, gravity, geomagnetic); are probably zero array and thus your accy is always zero

Upvotes: 1

Related Questions