问题描述
我试图制定一个光传感器应用为我的LG P990检测激光(不要问为什么)。
I am trying to Develop a Light Sensor App for my LG P990 to detect a Laser (don't ask why).
在code是这样的:
package soma.de.Light;
import android.app.Activity;
import android.content.Context;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
public class LightSensorActivity extends Activity {
SensorManager mySensorManager;
Sensor myLightSensor;
TextView textLightSensorData;
TextView textLightSensor;
Button Start;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
textLightSensor = (TextView)findViewById(R.id.tvLight);
textLightSensorData = (TextView)findViewById(R.id.tvAcc);
mySensorManager = (SensorManager)getSystemService(Context.SENSOR_SERVICE);
myLightSensor = mySensorManager.getDefaultSensor(Sensor.TYPE_LIGHT);
Start = (Button)findViewById(R.id.btStart);
Start.setOnClickListener(btListener);
if (myLightSensor == null){
textLightSensor.setText("No Light Sensor!"); //THIS IS WHAT I GET!
}else{
textLightSensor.setText(myLightSensor.getName() + "\n " + myLightSensor.getResolution() );
mySensorManager.registerListener(lightSensorEventListener,
myLightSensor,
SensorManager.SENSOR_DELAY_NORMAL);
}
}
private OnClickListener btListener = new OnClickListener()
{
public void onClick(View v){
myLightSensor = mySensorManager.getDefaultSensor(Sensor.TYPE_LIGHT);
if (myLightSensor == null){
textLightSensor.setText("No Light Sensor!");
}else{
textLightSensor.setText(myLightSensor.getName() + "\n " + myLightSensor.getResolution() );
mySensorManager.registerListener(lightSensorEventListener,
myLightSensor,
SensorManager.SENSOR_DELAY_NORMAL);
}
}
};
SensorEventListener lightSensorEventListener
= new SensorEventListener(){
@Override
public void onAccuracyChanged(Sensor arg0, int arg1) {
// TODO Auto-generated method stub
}
@Override
public void onSensorChanged(SensorEvent arg0) {
// TODO Auto-generated method stub
if(arg0.sensor.getType()==Sensor.TYPE_LIGHT){
textLightSensorData.setText("Light Sensor Date:"
+ String.valueOf(arg0.values[0]));
}else if(arg0.sensor.getType()==Sensor.TYPE_PROXIMITY){
textLightSensorData.setText("Test "
+ String.valueOf(arg0.values[0]) +" " + String.valueOf(arg0.values[1]));
}
}};
}
但我只得到我的活动没有光感应器的回报。
LG的P990确实有一个。在隐藏菜单我可以看到在ALC /接近测试的光传感器的值。
But I only get a "No Light Sensor" return on my Activity.The LG P990 does have one. In the "hidden menu" I can see the values of the light Sensor in the ALC / Proximity Test.
我必须改变我的code任何事情来得到它运行?
Do I have to change anything in my code to get it to run?
推荐答案
不知道 getDefaultSensor()
,但它的文档说:
not sure about getDefaultSensor()
, but the documentation for it says:
Note that the returned sensor could be a composite sensor,
and its data could be averaged or filtered. If you need to access
the raw sensors, use getSensorList()
这是我正在做的:
SensorManager sm = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
// Check if there is at least one light sensor
if (sm.getSensorList(Sensor.TYPE_LIGHT).size() == 0) {
// No light sensor installed
}
else {
Sensor light = sm.getSensorList(Sensor.TYPE_LIGHT).get(0);
if (!sm.registerListener(this, light, SensorManager.SENSOR_DELAY_GAME)) {
// Couldn't register light sensor listener
}
}
然后在你的 onSensorChanged()
方法 event.values [0]
为您提供的价值光传感器,即在0..100范围内的整数,就算我只看到10和100的值: - )
And then in your onSensorChanged()
method, event.values[0]
gives you the value of the light sensor, that is an integer in the 0..100 range, even if I have only seen values of 10 and 100 :-)
祝你好运,
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