Android 传感器数据获取

接着上篇wifi列表获取，我们这篇接着说传感器。还是看代码

我们先自己定义一个传感器的工具类（因为我这边只是获取了部分的传感器，需要获取额外的传感器自己配置一下就行了，工具类通过重载提供了不同的构造方法）：

 public class SensorUtils implements SensorEventListener {

    private SensorManager manager;

    
    public void RegisterSensor(Context context, List sensorList){
        manager = (SensorManager) context.getSystemService(SENSOR_SERVICE);
        for(Sensor sensors : sensorList){
            manager.registerListener(this,sensors,SensorManager.SENSOR_DELAY_NORMAL);
        }
    }

    
    public void RegisterSensor(Context context, Sensor sensor){
        manager = (SensorManager) context.getSystemService(SENSOR_SERVICE);
        manager.registerListener(this,sensor,SensorManager.SENSOR_DELAY_NORMAL);
    }

    @Override
    public void onSensorChanged(SensorEvent event) {
        switch (event.sensor.getType()){
            case Sensor.TYPE_ACCELEROMETER:
                //给加速度传感器设置回调监听
                sensorCallBack.acceleratedCallBack(event);
                break;
            case Sensor.TYPE_GYROSCOPE:
                //给陀螺仪传感器设置回调监听
                sensorCallBack.gyroscopeCallBack(event);
                break;
            case Sensor.TYPE_MAGNETIC_FIELD:
                //给磁场传感器设置回调监听
                sensorCallBack.magneticFieldCallBack(event);
                break;
            case Sensor.TYPE_PRESSURE:
                //给气压计传感器设置回调监听
                sensorCallBack.pressureCallBack(event);
                break;
        }

    }

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

    }

    //使用完之后记得取消注册
    public void UnRegisterSensor(){
        if (manager != null){
            manager.unregisterListener(this);
        }
    }

    public interface SensorCallBack{
        void acceleratedCallBack(SensorEvent event);

        void gyroscopeCallBack(SensorEvent event);

        void magneticFieldCallBack(SensorEvent event);

        void pressureCallBack(SensorEvent event);
    }

   private SensorCallBack sensorCallBack;

    public SensorUtils(SensorCallBack sensorCallBack){
        this.sensorCallBack = sensorCallBack;
    }

}

然后我们在activity中去使用工具类：

//初始化
sensorUtils = new SensorUtils(this);
sensorUtils.RegisterSensor(this, sensorList);

activity中别忘了实现SensorUtil中的回调监听

public class SensorActivity extends baseActivity implements SensorUtils.SensorCallBack{

  //do something
}

然后在自己设置的回调监听中去实现自己想要的功能

  @Override
    public void acceleratedCallBack(SensorEvent event) {
        //可以做自己想要的操作
        if (event != null) {
            float[] values = event.values;
            float x1 = values[0];
            float y1 = values[1];
            float z1 = values[2];
            StringBuffer stringBuffer = new StringBuffer();
            stringBuffer.append(getString(R.string.accelerometer_number)).append("n");
            stringBuffer.append(getString(R.string.x1)).append(x1).append("n");
            stringBuffer.append(getString(R.string.y1)).append(y1).append("n");
            stringBuffer.append(getString(R.string.z1)).append(z1);
            if (!viewDateBinding.scrollView.isMove()) {
                handler.post(() -> viewDateBinding.tvAccelerated.setText(stringBuffer.toString()));
            }
            if (flagAccelerated) {
                DataBassManager.getInstance(SensorActivity.this).insertSensor(new TableBean(null,stringBuffer.toString(),null,null,null));
            }
            flagAccelerated = false;
        }
    }

    @Override
    public void gyroscopeCallBack(SensorEvent event) {
        //可以做自己想要的操作
        if (event != null) {
            float x2 = event.values[0];
            float y2 = event.values[1];
            float z2 = event.values[2];
            StringBuffer stringBuffer = new StringBuffer();
            stringBuffer.append(getString(R.string.gyroscope_number)).append("n");
            stringBuffer.append(getString(R.string.x2)).append(x2).append("n");
            stringBuffer.append(getString(R.string.y2)).append(y2).append("n");
            stringBuffer.append(getString(R.string.z2)).append(z2);
            if (!viewDateBinding.scrollView.isMove()) {
                handler.post(() -> viewDateBinding.tvGyroscope.setText(stringBuffer.toString()));
            }
            if (flagGyroscope) {
                DataBassManager.getInstance(SensorActivity.this).insertSensor(new TableBean(null,null,stringBuffer.toString(),null,null));
            }
            flagGyroscope = false;
        }
    }

    @SuppressLint("DefaultLocale")
    @Override
    public void magneticFieldCallBack(SensorEvent event) {
        //可以做自己想要的操作
        if (event != null) {
            float x3 = event.values[0];
            float y3 = event.values[1];
            float z3 = event.values[2];
            StringBuffer stringBuffer = new StringBuffer();
            stringBuffer.append(getString(R.string.magnetic_field_number)).append("n");
            stringBuffer.append(getString(R.string.x3)).append(String.format("%.2f", x3)).append("n");
            stringBuffer.append(getString(R.string.y3)).append(String.format("%.2f", y3)).append("n");
            stringBuffer.append(getString(R.string.z3)).append(String.format("%.2f", z3));
            if (!viewDateBinding.scrollView.isMove()) {
                handler.post(() -> viewDateBinding.tvMagneticField.setText(stringBuffer.toString()));
            }
            if (flagMagneticField) {
                DataBassManager.getInstance(SensorActivity.this).insertSensor(new TableBean(null,null,null,stringBuffer.toString(),null));
            }
            flagMagneticField = false;
        }
    }

    @Override
    public void pressureCallBack(SensorEvent event) {
        //可以做自己想要的操作
        if (event != null) {
            float x4 = event.values[0];
            String str4 = getString(R.string.pressure_number) + x4;
            if (!viewDateBinding.scrollView.isMove()) {
                handler.post(() -> viewDateBinding.tvPressure.setText(str4));
            }
            if (flagPressure) {
                DataBassManager.getInstance(SensorActivity.this).insertSensor(new TableBean(null,null,null,null,str4));
            }
            flagPressure = false;
        }
    }

我这边是将数据通过按钮的点击事件存储进了数据库，注意传感器的回调是实时的，所以如果想要获取某一时刻，需要自己通过boolean去判断是否需要获取回调数据

最后，记得取消监听，因为我是在activity中去注册的，所以取消注册也是在activity中去做：

  protected void onStop() {
        super.onStop();
        sensorUtils.UnRegisterSensor();
    }