java - 每次应用程序启动时，如何将计步器重置为 0？

Question

每次应用程序启动时，如何将计步器重置为 0？如果我关闭应用程序并重新启动它，计数器将从之前停止的位置继续。我希望一切能够重新开始。我已经尝试在每次应用程序启动时将我采取的步数 textview 设置为 0，但它不会改变任何内容。

public class HomeActivity extends AppCompatActivity implements SensorEventListener {
private TextView stepsTakenTextView;
private TextView distanceTraveledTextView;
private SensorManager sensorManager;
private  Boolean running = false;
private UserModel userModel;


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

    stepsTakenTextView = findViewById(R.id.stepsTakenTextView);
    distanceTraveledTextView = findViewById(R.id.distanceTraveledTextView);
    sensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);

}

@Override
protected void onResume() {
    super.onResume();
    running = true;
    Sensor countSensor = sensorManager.getDefaultSensor(Sensor.TYPE_STEP_COUNTER);
    if(countSensor != null){
        sensorManager.registerListener(this, countSensor, SensorManager.SENSOR_DELAY_UI);
    }else{
        Toast.makeText(this, "Sensor not found", Toast.LENGTH_SHORT).show();
    }

}

@Override
protected void onPause() {
    super.onPause();
    running = false;
}


@Override
public void onSensorChanged(SensorEvent event) {
    if(running){
        float stepsTaken= event.values[0];

Answer 1

只有当设备重新启动时，传感器才会重新启动。

Android 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...

相反，您可以执行以下操作:

1. 启动应用后，立即保存传感器返回的第一个值。
2. 每当传感器发出新值时，就从中减去初始值。