调用anroid的光线传感器使用。
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实现效果图：
MainActivity.Java
package hk.ust.cse.comp107x.ligthsensor;
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.widget.TextView;
public class MainActivity extends AppCompatActivity implements SensorEventListener{
private SensorManager mSensorManager;
private Sensor mPressure;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Get an instance of the sensor service, and use that to get an instance of
// a particular sensor.
mSensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
mPressure = mSensorManager.getDefaultSensor(Sensor.TYPE_LIGHT);
}
@Override
public final void onAccuracyChanged(Sensor sensor, int accuracy) {
// Do something here if sensor accuracy changes.
}
@Override
public final void onSensorChanged(SensorEvent event) {
float light = event.values[0];
TextView v = (TextView)findViewById(R.id.textView);
v.setText(Float.toString(light));
// Do something with this sensor data.
}
@Override
protected void onResume() {
// Register a listener for the sensor.
super.onResume();
mSensorManager.registerListener(this, mPressure, SensorManager.SENSOR_DELAY_NORMAL);
}
@Override
protected void onPause() {
// Be sure to unregister the sensor when the activity pauses.
super.onPause();
mSensorManager.unregisterListener(this);
}
}
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
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