Your question is very similar to this:
link
and this:
link
You can use
TYPE_AMBIENT_TEMPERATURE
to check the temperature of the cpu or battery.
Look at the example given:
import android.app.Activity;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
public class TempSensorActivity extends Activity, implements SensorEventListener {
private final SensorManager mSensorManager;
private final Sensor mTempSensor;
public TempSensorActivity() {
mSensorManager = (SensorManager)getSystemService(SENSOR_SERVICE);
mTempSensor = mSensorManager.getDefaultSensor(Sensor.TYPE_AMBIENT_TEMPERATURE);
}
protected void onResume() {
super.onResume();
mSensorManager.registerListener(this, mTempSensor, SensorManager.SENSOR_DELAY_NORMAL);
}
protected void onPause() {
super.onPause();
mSensorManager.unregisterListener(this);
}
public void onAccuracyChanged(Sensor sensor, int accuracy) {
}
public void onSensorChanged(SensorEvent event) {
}
}
Take a look here: SensorManager