나는 안드로이드 용 가속도계로 작업하고 있는데 왜 내가 mSensorX, mSensorY 및 mSensorZ에 할당 한 3 축이 onSensorChange에서 사용되었을 때 사용되지 않은 것으로 레이블이 붙었는지 이해할 수 없다. 나는 이것을 이해한다.Accelerometer code
package com.example.imageaccel;
import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.os.Bundle;
import android.widget.TextView;
public class ImageAccelActivity extends Activity implements SensorEventListener {
/** Called when the activity is first created. */
TextView x, y, z;
private float mSensorX;
private float mSensorY;
private float mSensorZ;
private Bitmap car;
private SensorManager sm = null;
// Bitmap car1;
// float x1, y1, z1, sensorX, sensorY, sensorZ;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
x = (TextView)findViewById(R.id.x_axis);
y = (TextView)findViewById(R.id.y_axis);
z = (TextView)findViewById(R.id.z_axis);
SensorManager sm = (SensorManager)getSystemService(Context.SENSOR_SERVICE);
if (sm.getSensorList(Sensor.TYPE_ACCELEROMETER).size() !=0){
Sensor s = sm.getSensorList(Sensor.TYPE_ACCELEROMETER).get(0);
sm.registerListener(this, s, SensorManager.SENSOR_DELAY_NORMAL);
}
}
@Override
protected void onResume() {
// TODO Auto-generated method stub
super.onResume();
sm.registerListener(this, sm.getDefaultSensor(Sensor.TYPE_ACCELEROMETER),SensorManager.SENSOR_DELAY_NORMAL);
}
@Override
protected void onPause() {
// TODO Auto-generated method stub
super.onPause();
sm.unregisterListener(this);
super.onPause();
}
@Override
public void onAccuracyChanged(Sensor arg0, int arg1) {
// TODO Auto-generated method stub
}
@Override
public void onSensorChanged(SensorEvent ev) {
// TODO Auto-generated method stub
if(ev.sensor.getType()==Sensor.TYPE_ACCELEROMETER){
mSensorX = ev.values[0];
mSensorY = ev.values[1];
mSensorZ = ev.values[2];
}
}
protected void onDraw(Canvas canvas) {
/*
* draw the background
*/
canvas.drawBitmap(car, 0, 0, null);
}
}