Android 傳感器資料獲取

接著上篇wifi串列獲取，我們這篇接著說傳感器，還是看代碼

我們先自己定義一個傳感器的工具類（因為我這邊只是獲取了部分的傳感器，需要獲取額外的傳感器自己配置一下就行了，工具類通過多載提供了不同的構造方法）：

 public class SensorUtils implements SensorEventListener {

    private SensorManager manager;

    /**
     * @param context 多個傳感器
     * @param sensorList
     */
    public void RegisterSensor(Context context, List<Sensor> sensorList){
        manager = (SensorManager) context.getSystemService(SENSOR_SERVICE);
        for(Sensor sensors : sensorList){
            manager.registerListener(this,sensors,SensorManager.SENSOR_DELAY_NORMAL);
        }
    }

    /**
     * @param context 單個傳感器
     * @param sensor
     */
    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:
                //給加速度傳感器設定回呼監聽
                sensorCallBack.acceleratedCallBack(event);
                break;
            case Sensor.TYPE_GYROSCOPE:
                //給陀螺儀傳感器設定回呼監聽
                sensorCallBack.gyroscopeCallBack(event);
                break;
            case Sensor.TYPE_MAGNETIC_FIELD:
                //給磁場傳感器設定回呼監聽
                sensorCallBack.magneticFieldCallBack(event);
                break;
            case Sensor.TYPE_PRESSURE:
                //給氣壓計傳感器設定回呼監聽
                sensorCallBack.pressureCallBack(event);
                break;
        }

    }

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

    }

    //使用完之后記得取消注冊
    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;
    }

}

然后我們在activity中去使用工具類：

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

activity中別忘了實作SensorUtil中的回呼監聽

public class SensorActivity extends BaseActivity<BaseViewModel, ActivitySensorBinding> implements SensorUtils.SensorCallBack{

  //do something
}

然后在自己設定的回呼監聽中去實作自己想要的功能

  @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;
        }
    }

我這邊是將資料通過按鈕的點擊事件存盤進了資料庫，注意傳感器的回呼是實時的，所以如果想要獲取某一時刻，需要自己通過boolean去判斷是否需要獲取回呼資料

最后，記得取消監聽，因為我是在activity中去注冊的，所以取消注冊也是在activity中去做：

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