Thứ Năm, 30 tháng 8, 2012

Access temperature sensor, TYPE_TEMPERATURE and TYPE_AMBIENT_TEMPERATURE.

0
09:04
The temperature sensors (Sensor.TYPE_TEMPERATURE/Sensor.TYPE_AMBIENT_TEMPERATURE) are used to determine temperature of the phone, for internal hardware. They are not available on all device. (It's not available on my HTC One X and HTC Flyer!)

Sensor.TYPE_TEMPERATURE is deprecated, use Sensor.TYPE_AMBIENT_TEMPERATURE instead.

Example:
package com.example.androidsensor;

import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.os.Bundle;
import android.app.Activity;
import android.widget.TextView;

public class MainActivity extends Activity {

TextView textTEMPERATURE_available, textTEMPERATURE_reading;
TextView textAMBIENT_TEMPERATURE_available, textAMBIENT_TEMPERATURE_reading;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

textTEMPERATURE_available
= (TextView)findViewById(R.id.TEMPERATURE_available);
textTEMPERATURE_reading
= (TextView)findViewById(R.id.TEMPERATURE_reading);
textAMBIENT_TEMPERATURE_available
= (TextView)findViewById(R.id.AMBIENT_TEMPERATURE_available);
textAMBIENT_TEMPERATURE_reading
= (TextView)findViewById(R.id.AMBIENT_TEMPERATURE_reading);

SensorManager mySensorManager = (SensorManager)getSystemService(SENSOR_SERVICE);

Sensor TemperatureSensor = mySensorManager.getDefaultSensor(Sensor.TYPE_TEMPERATURE);
if(TemperatureSensor != null){
textTEMPERATURE_available.setText("Sensor.TYPE_TEMPERATURE Available");
mySensorManager.registerListener(
TemperatureSensorListener,
TemperatureSensor,
SensorManager.SENSOR_DELAY_NORMAL);

}else{
textTEMPERATURE_available.setText("Sensor.TYPE_TEMPERATURE NOT Available");
}

Sensor AmbientTemperatureSensor
= mySensorManager.getDefaultSensor(Sensor.TYPE_AMBIENT_TEMPERATURE);
if(AmbientTemperatureSensor != null){
textAMBIENT_TEMPERATURE_available.setText("Sensor.TYPE_AMBIENT_TEMPERATURE Available");
mySensorManager.registerListener(
AmbientTemperatureSensorListener,
AmbientTemperatureSensor,
SensorManager.SENSOR_DELAY_NORMAL);
}else{
textAMBIENT_TEMPERATURE_available.setText("Sensor.TYPE_AMBIENT_TEMPERATURE NOT Available");
}
}

private final SensorEventListener TemperatureSensorListener
= new SensorEventListener(){

@Override
public void onAccuracyChanged(Sensor sensor, int accuracy) {
// TODO Auto-generated method stub

}

@Override
public void onSensorChanged(SensorEvent event) {
if(event.sensor.getType() == Sensor.TYPE_TEMPERATURE){
textTEMPERATURE_reading.setText("TEMPERATURE: " + event.values[0]);
}
}

};

private final SensorEventListener AmbientTemperatureSensorListener
= new SensorEventListener(){

@Override
public void onAccuracyChanged(Sensor sensor, int accuracy) {
// TODO Auto-generated method stub

}

@Override
public void onSensorChanged(SensorEvent event) {
if(event.sensor.getType() == Sensor.TYPE_AMBIENT_TEMPERATURE){
textAMBIENT_TEMPERATURE_reading.setText("AMBIENT TEMPERATURE: " + event.values[0]);
}
}

};

}


<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">

<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/hello_world"
tools:context=".MainActivity" />

<TextView
android:id="@+id/TEMPERATURE_available"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
<TextView
android:id="@+id/TEMPERATURE_reading"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
<TextView
android:id="@+id/AMBIENT_TEMPERATURE_available"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
<TextView
android:id="@+id/AMBIENT_TEMPERATURE_reading"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />

</LinearLayout>


Related:
- Determine light level, Sensor.TYPE_LIGHT.

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