How to measure ambient temperature in android

Question

How to measure ambient temperature in android

I want to measure the ambient temperature on an Android device. but my device does not include a thermometer sensor. How can I measure it? Thank.

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android temperature ambient

Furkan Aug 16 '12 at 12:28

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3 answers

Jorgesys · Answer 1 · 2015-03-26T17:42:18+0000

This is a basic example of how to get the ambient temperature in Android :

import android.support.v7.app.AppCompatActivity;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.os.Build;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.TextView;


public class MainActivity extends AppCompatActivity implements SensorEventListener {

    private TextView temperaturelabel;
    private SensorManager mSensorManager;
    private Sensor mTemperature;
    private final static String NOT_SUPPORTED_MESSAGE = "Sorry, sensor not available for this device.";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        temperaturelabel = (TextView) findViewById(R.id.myTemp);
        mSensorManager = (SensorManager)getSystemService(SENSOR_SERVICE);
        if(Build.VERSION.SDK_INT>=Build.VERSION_CODES.ICE_CREAM_SANDWICH){
            mTemperature= mSensorManager.getDefaultSensor(Sensor.TYPE_AMBIENT_TEMPERATURE); // requires API level 14.
        }
        if (mTemperature == null) {             
            temperaturelabel.setText(NOT_SUPPORTED_MESSAGE);
        }       
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }

    @Override
    protected void onResume() {
        super.onResume();
        mSensorManager.registerListener(this, mTemperature, SensorManager.SENSOR_DELAY_NORMAL);
    }

    @Override
    protected void onPause() {                 
        super.onPause();
        mSensorManager.unregisterListener(this);
    }


    @Override
    public void onSensorChanged(SensorEvent event) {
        float ambient_temperature = event.values[0];
        temperaturelabel.setText("Ambient Temperature:\n " + String.valueOf(ambient_temperature) + getResources().getString(R.string.celsius));     
    }

    @Override
    public void onAccuracyChanged(Sensor sensor, int accuracy) {
        // Do something here if sensor accuracy changes.
    }
}

you can download the full example from: https://github.com/Jorgesys/Android_Ambient_Temperature

nandeesh · Answer 2 · 2012-08-16T12:30:09+0000

It's impossible. Temperature sensor, even if it exists, for battery temperature and processor temperature.

: , API 14 , ,

, (. .) , . . ( , API Android 2.3.)

Sensor.TYPE_TEMPERATURE, . , . Sensor.TYPE_AMBIENT_TEMPERATURE, , .

Swayam · Answer 3 · 2012-08-16T12:34:51+0000

:

public class SensorActivity extends Activity, implements SensorEventListener {
 private final SensorManager mSensorManager;
 private final Sensor mTemp;

 public SensorActivity() {
     mSensorManager = (SensorManager)getSystemService(SENSOR_SERVICE);
     mtemp = mSensorManager.getDefaultSensor(Sensor.TYPE_TEMPERATURE);
 }

 protected void onResume() {
     super.onResume();
     mSensorManager.registerListener(this, mTemp, SensorManager.SENSOR_DELAY_NORMAL);
 }

 protected void onPause() {
     super.onPause();
     mSensorManager.unregisterListener(this);
 }

 public void onAccuracyChanged(Sensor sensor, int accuracy) {
 }

 public void onSensorChanged(SensorEvent event) {
 }

Alternatively, you can read the SensorManager documentation here: http://developer.android.com/reference/android/hardware/SensorManager.html

How to measure ambient temperature in android

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