안녕하세요? ^^
실질적으로 Android 개발 3일째에 왔습니다.
센서의 Z/Y 값을 체크해 디스플레이의 화면 밝기를 조절하는걸 만들고자 하는데요 ^^;
Switch 값이 true 일 때 센서 값을 불러오는 형태 입니다. 그런데 true 일 때 오류가 발생합니다.
오류 원문은 다음과 같습니다. onCreate 이전에 콜을 해서 그렇다는데 ..
이미 onCreate 후 Switch 를 체크하고 있는게 아닌건가요? ^^;
java.lang.IllegalStateException: System services not available to Activities before onCreate()
at android.app.Activity.getSystemService(Activity.java:4463)
at com.knspower.watchautoon.SensorWork.sensorCheck(SensorWork.java:25)
at com.knspower.watchautoon.WatchAutoOn$1.onCheckedChanged(WatchAutoOn.java:28)
at android.widget.CompoundButton.setChecked(CompoundButton.java:126)
at android.widget.Switch.setChecked(Switch.java:666)
at android.widget.CompoundButton.toggle(CompoundButton.java:87)
at android.widget.CompoundButton.performClick(CompoundButton.java:99)
at android.view.View$PerformClick.run(View.java:17355)
at android.os.Handler.handleCallback(Handler.java:725)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:5041)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
at dalvik.system.NativeStart.main(Native Method)
코드는 다음과 같습니다! 감사합니다 //ㅂ//
package com.knspower.watchautoon;
import android.os.Bundle;
import android.app.Activity;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.Switch;
public class WatchAutoOn extends Activity {
private Switch activationSwitch;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_watch_auto_on);
final SensorWork __SW = new SensorWork();
activationSwitch = (Switch) findViewById(R.id.activationSwitch);
activationSwitch.setChecked(false);
activationSwitch.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if(isChecked) {
__SW.sensorCheck();
__SW.initializeViews();
} else {
}
}
});
}
// winManager = (WindowManager) getSystemService(WINDOW_SERVICE);
// winManager.getDefaultDisplay();
}
package com.knspower.watchautoon;
import android.content.Context;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.view.WindowManager;
import android.widget.TextView;
public class SensorWork extends WatchAutoOn implements SensorEventListener {
private SensorManager sensorManager;
private Sensor accelerometer;
private float sensorX = 0;
private float sensorY = 0;
private float sensorZ = 0;
//private WindowManager winManager;
private TextView currentX, currentY, currentZ;
public void sensorCheck(){
sensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
if (sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER) != null) {
accelerometer = sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
sensorManager.registerListener(this, accelerometer, SensorManager.SENSOR_DELAY_NORMAL);
} else {
// No Sensor!
}
}
public void initializeViews() {
currentX = (TextView) findViewById(R.id.currentX);
currentY = (TextView) findViewById(R.id.currentY);
currentZ = (TextView) findViewById(R.id.currentZ);
}
protected void onResume() {
super.onResume();
sensorManager.registerListener(this, accelerometer, SensorManager.SENSOR_DELAY_NORMAL);
}
protected void onPause() {
super.onPause();
sensorManager.unregisterListener(this);
}
@Override
public void onAccuracyChanged(Sensor sensor, int accuracy) {
}
public void requestScreenOn(int Brightness) {
WindowManager.LayoutParams params = getWindow().getAttributes();
params.flags |= WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON;
params.screenBrightness = Brightness;
getWindow().setAttributes(params);
}
@Override
public void onSensorChanged(SensorEvent event) {
displayCleanValues();
displayCurrentValues();
sensorX = event.values[0];
sensorY = event.values[1];
sensorZ = event.values[2];
if(sensorY > 0 && sensorY < 4 & sensorZ > 8) {
requestScreenOn(100);
} else {
requestScreenOn(0);
}
}
public void displayCleanValues() {
currentX.setText("0.0");
currentY.setText("0.0");
currentZ.setText("0.0");
}
public void displayCurrentValues() {
currentX.setText(Float.toString(sensorX));
currentY.setText(Float.toString(sensorY));
currentZ.setText(Float.toString(sensorZ));
}
}