Question

I cant find what is wrong here in this code. I am trying to get acceletometer data, but when i try to run it on device it comes out with a message, that process has been shut down.

public class SensorActivity extends Activity implements SensorEventListener {   
SensorManager sm;
Sensor sensor ;
TextView yViewA = null;
TextView zViewA = null;
TextView xViewO = null;
TextView yViewO = null;
TextView zViewO = null;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);


 sm = (SensorManager)getSystemService(SENSOR_SERVICE);
 sensor = sm.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
 xViewA = (TextView) findViewById(R.id.xbox);
 yViewA = (TextView) findViewById(R.id.ybox);
 zViewA = (TextView) findViewById(R.id.zbox);
 xViewO = (TextView) findViewById(R.id.xboxo);
 yViewO = (TextView) findViewById(R.id.yboxo);
 zViewO = (TextView) findViewById(R.id.zboxo);


}    

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

@Override
protected void onStop() {
    sm.unregisterListener(this);
    super.onStop();
}

public void onAccuracyChanged(Sensor sensor, int accuracy) {
    // TODO Auto-generated method stub

}

public void onSensorChanged(SensorEvent event) {
    // TODO Auto-generated method stub  

    xViewO.setText("Orientation X: " + event.values[0]);
    yViewO.setText("Orientation Y: " + event.values[1]);
    zViewO.setText("Orientation Z: " + event.values[2]);

} 

UPD:

05-18 19:42:17.570: E/AndroidRuntime(14875): android.app.SuperNotCalledException: Activity {daler.sensor/daler.sensor.SensorActivity} did not call through to super.onCreate()

05-18 19:42:17.570: E/AndroidRuntime(14875):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1933)

05-18 19:42:17.570: E/AndroidRuntime(14875):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1992)

05-18 19:42:17.570: E/AndroidRuntime(14875):    at android.app.ActivityThread.access$600(ActivityThread.java:127)

05-18 19:42:17.570: E/AndroidRuntime(14875):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1158)

05-18 19:42:17.570: E/AndroidRuntime(14875):    at android.os.Handler.dispatchMessage(Handler.java:99)

05-18 19:42:17.570: E/AndroidRuntime(14875):    at android.os.Looper.loop(Looper.java:137)

05-18 19:42:17.570: E/AndroidRuntime(14875):    at android.app.ActivityThread.main(ActivityThread.java:4441)

05-18 19:42:17.570: E/AndroidRuntime(14875):    at java.lang.reflect.Method.invokeNative(Native Method)

UPD2: Code is updated, still facing problem.
UPD3:Log cat updated

UPD4: I updated the code, now it works. Maybe someone will need it. Thanks.

Answer 1

You can’t put findViewById(R.id.xbox); in your class body. It should go to onCreate() after setContentView().

The problem is on line 18 of your code (according to logcat). It’s probably this one:

Sensor sensor = sm.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);

Because you write:
SensorManager sm;
so the sensor manager is null so you can’t use it in sm.getDefaultSensor().

See this link to find out how to initalize sensor manager:

 public SensorActivity() {
     sm = (SensorManager)getSystemService(SENSOR_SERVICE);
     sensor = mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
 }