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TemperatureActivity.java
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TemperatureActivity.java
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/*
* Copyright 2016, The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.example.androidthings.driversamples;
import android.app.Activity;
import android.content.Context;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.hardware.SensorManager.DynamicSensorCallback;
import android.os.Bundle;
import android.util.Log;
import com.google.android.things.contrib.driver.bmx280.Bmx280SensorDriver;
import java.io.IOException;
/**
* TemperatureActivity is an example that use the driver for the BMP280 temperature sensor.
*/
public class TemperatureActivity extends Activity implements SensorEventListener {
private static final String TAG = TemperatureActivity.class.getSimpleName();
private Bmx280SensorDriver mTemperatureSensorDriver;
private SensorManager mSensorManager;
private DynamicSensorCallback mDynamicSensorCallback = new DynamicSensorCallback() {
@Override
public void onDynamicSensorConnected(Sensor sensor) {
if (sensor.getType() == Sensor.TYPE_AMBIENT_TEMPERATURE) {
Log.i(TAG, "Temperature sensor connected");
mSensorManager.registerListener(TemperatureActivity.this,
sensor, SensorManager.SENSOR_DELAY_NORMAL);
}
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Log.i(TAG, "Starting TemperatureActivity");
mSensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
mSensorManager.registerDynamicSensorCallback(mDynamicSensorCallback);
try {
mTemperatureSensorDriver = new Bmx280SensorDriver(BoardDefaults.getI2CPort());
mTemperatureSensorDriver.registerTemperatureSensor();
} catch (IOException e) {
Log.e(TAG, "Error configuring sensor", e);
}
}
@Override
protected void onDestroy() {
super.onDestroy();
Log.i(TAG, "Closing sensor");
if (mTemperatureSensorDriver != null) {
mSensorManager.unregisterDynamicSensorCallback(mDynamicSensorCallback);
mSensorManager.unregisterListener(this);
mTemperatureSensorDriver.unregisterTemperatureSensor();
try {
mTemperatureSensorDriver.close();
} catch (IOException e) {
Log.e(TAG, "Error closing sensor", e);
} finally {
mTemperatureSensorDriver = null;
}
}
}
@Override
public void onSensorChanged(SensorEvent event) {
Log.i(TAG, "sensor changed: " + event.values[0]);
}
@Override
public void onAccuracyChanged(Sensor sensor, int accuracy) {
Log.i(TAG, "sensor accuracy changed: " + accuracy);
}
}