Android Pressure Sensor

我会带着你远行 2023-10-17 16:07 2阅读 0赞

package zhangphil.sensor;
    
    import android.content.Context;
    import android.hardware.Sensor;
    import android.hardware.SensorEvent;
    import android.hardware.SensorEventListener;
    import android.hardware.SensorManager;
    import android.support.v7.app.AppCompatActivity;
    import android.os.Bundle;
    import android.util.Log;
    
    public class MainActivity extends AppCompatActivity {
        private SensorManager mSensorManager;
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
    
            startSensor();
        }
    
        /**
         * 启动传感器。
         */
        private void startSensor() {
            mSensorManager = (SensorManager) this.getSystemService(Context.SENSOR_SERVICE);
    
            Sensor mSensor = mSensorManager.getDefaultSensor(Sensor.TYPE_PRESSURE);
            if (mSensorManager == null || mSensor == null) {
                throw new UnsupportedOperationException("设备不支持");
            }
    
            boolean isRegister = mSensorManager.registerListener(mSensorEventListener, mSensor, SensorManager.SENSOR_DELAY_NORMAL);
            if (!isRegister) {
                throw new UnsupportedOperationException();
            }
        }
    
        private SensorEventListener mSensorEventListener = new SensorEventListener() {
            @Override
            public void onSensorChanged(SensorEvent sensorEvent) {
                if (sensorEvent.sensor.getType() == Sensor.TYPE_PRESSURE) {
                    /**
                     * 传感器返回的压强,单位是百帕。
                     */
                    float pressure = sensorEvent.values[0];
                    Log.d("压强", String.valueOf(pressure) + "百帕");
                }
            }
    
            @Override
            public void onAccuracyChanged(Sensor sensor, int i) {
    
            }
        };
    
        @Override
        protected void onDestroy() {
            super.onDestroy();
            mSensorManager.unregisterListener(mSensorEventListener);
        }
    }