即使在卸载后，我的计步器也不会重置步数

Question

I use Sensor.TYPE_STEP_COUNTER I know it only resets when rebooting. Is there an alternative way to reset the steps to 0 when pressing a button?

Please see my code, you will find the Runactivity.class

Maybe I can do it in another way which resets the steps. without having me to reboot every time.

public class RunActivity extends AppCompatActivity implements SensorEventListener{

    private SensorManager sensorManager;
    private TextView count;
    boolean activityRunning;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_run);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        Bundle bundle = getIntent().getExtras();
        final String naam   = bundle.getString("naam");
        TextView NaamView = null;

        Button stopRun = (Button) findViewById(R.id.stopRun);

        count = (TextView) findViewById(R.id.countView);
        sensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);

        NaamView =  (TextView) findViewById(R.id.naamRunText);

        NaamView.setText(naam);

        stopRun.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                String countValue = count.getText().toString();



                Log.d("countVAL", String.valueOf(countValue));


                Intent myIntent = new Intent(RunActivity.this, HomeScreenActivity.class);

                Bundle bundle = new Bundle();


                bundle.putString("naam", naam);
                sensorManager.flush(RunActivity.this);
                sensorManager.unregisterListener(RunActivity.this);
                count.setText("0");
                onStop();

                myIntent.putExtras(bundle);

                startActivity(myIntent);


            }
        });

    }



    @Override
    protected void onResume() {
        super.onResume();
        activityRunning = true;
        Sensor countSensor = sensorManager.getDefaultSensor(Sensor.TYPE_STEP_COUNTER);
        if(countSensor != null){
            sensorManager.registerListener(this, countSensor, SensorManager.SENSOR_DELAY_UI);

        }else{
            Toast.makeText(this, "Jouw apparaat heeft geen sensor!", Toast.LENGTH_LONG) .show();
        }
    }

    @Override
    public void onSensorChanged(SensorEvent event) {
        if(activityRunning){
            count.setText(String.valueOf(event.values[0]));
        }else{
            event.values[0] = 0;
        }



    }



    @Override
    protected void onPause() {
        super.onPause();
        sensorManager.unregisterListener(this);
        activityRunning = false;
    }



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

    }

    protected void onDestroy() {
        super.onDestroy();

    }
}

Answer 1

When you click the reset button in the app save the current step count to SharedPreferences. And you'll need a way to find out when was the last reboot because every time you reboot the saved count number gets invalid.

private Integer stepsInSensor;
private Integer stepsAtReset;

void onCreate() {
  SharedPreferences prefs = getSharedPreferences(MY_PREFS_NAME, MODE_PRIVATE); 
  stepsAtReset = prefs.getInt("stepsAtReset", 0);
}

public void onClick(View v) {
    stepsAtReset = stepsInSensor;
    if (stepsAtReset != null) {
        SharedPreferences.Editor editor =
            getSharedPreferences(MY_PREFS_NAME, MODE_PRIVATE).edit();
        editor.putInt("stepsAtReset", stepsAtReset);
        editor.commit();
    }
    // you can now display 0:
    count.setText(String.valueOf(0));
}

@Override
public void onSensorChanged(SensorEvent event) {
    if(activityRunning){
        stepsInSensor = Integer.valueOf(event.values[0]);
        if (stepsAtReset = null) {
            stepsAtReset = stepsInSensor;
        }
        int stepsSinceReset = stepsInSensor - stepsAtReset;
        if (stepsSinceReset < 0) {
            stepsAtReset = stepsInSensor;
            stepsSinceReset = 0;
        }
        count.setText(String.valueOf(stepsSinceReset));
    }else{
        event.values[0] = 0;
    }
}

Answer 2

Nope, based on the Sensor API

A sensor of this type returns the number of steps taken by the user since the last reboot while activated. The value is returned as a float (with the fractional part set to zero) and is reset to zero only on a system reboot.

It can only be reset when the system is rebooted

Answer 3

I searched on it and tried to do it with different ways. Nothing Helped. Then I found the most simple way possible.

In onSensorChanged() just add the counter so when ever onSensorChanged() will be called (it will be called on every step), counter will simply count the steps then show this counter to your UI instead of showing the value of event.values[0]

on your Reset button make the counter 0 again.