我目前在 Eclipse 中遇到问题，即使我的 Phidget RFID 连接了设备（模拟器），但我已经在与 android 无关的普通 Java 类中运行它并且它可以工作。我已经重新启动了很多次。
以下是日志猫报告：
01-06 13:10:18.984: W/System.err(623): PhidgetException 5 (Phidget not physically attached.)
01-06 13:10:19.004: W/System.err(623): at com.phidgets.RFIDPhidget.setAntennaOn(Native Method)
01-06 13:10:19.016: W/System.err(623): at myFood.myFood.AddFood.onCreate(AddFood.java:35)
01-06 13:10:19.034: W/System.err(623): at android.app.Activity.performCreate(Activity.java:4465)
01-06 13:10:19.034: W/System.err(623): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
01-06 13:10:19.034: W/System.err(623): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920)
01-06 13:10:19.044: W/System.err(623): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
01-06 13:10:19.054: W/System.err(623): at android.app.ActivityThread.access$600(ActivityThread.java:123)
01-06 13:10:19.054: W/System.err(623): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
01-06 13:10:19.054: W/System.err(623): at android.os.Handler.dispatchMessage(Handler.java:99)
01-06 13:10:19.074: W/System.err(623): at android.os.Looper.loop(Looper.java:137)
01-06 13:10:19.074: W/System.err(623): at android.app.ActivityThread.main(ActivityThread.java:4424)
01-06 13:10:19.085: W/System.err(623): at java.lang.reflect.Method.invokeNative(Native Method)
01-06 13:10:19.085: W/System.err(623): at java.lang.reflect.Method.invoke(Method.java:511)
01-06 13:10:19.085: W/System.err(623): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
01-06 13:10:19.094: W/System.err(623): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
01-06 13:10:19.103: W/System.err(623): at dalvik.system.NativeStart.main(Native Method)
下面是我的代码：
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import com.phidgets.InterfaceKitPhidget;
import com.phidgets.Phidget;
import com.phidgets.PhidgetException;
import com.phidgets.RFIDPhidget;
import com.phidgets.event.TagGainEvent;
import com.phidgets.event.TagGainListener;
public class AddFood extends Activity {
/** Called when the activity is first created. */
RFIDPhidget rfid;
static String x ="NULL";
int i = 0;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.addfood);
final TextView mytext=(TextView)findViewById(R.id.widget96);
try
{
com.phidgets.usb.Manager.Initialize(this);
rfid = new RFIDPhidget();
rfid.setAntennaOn(true);
rfid.setLEDOn(true);
//Begin the TagGained event, allowing for users to read the RFID values
rfid.addTagGainListener(new TagGainListener()
{
public void tagGained(TagGainEvent oe)
{
Object y = (oe.getValue());
x= y.toString();
}
});
rfid.open(34235);
long StartTime,RunTime;
StartTime=System.currentTimeMillis();
do{
RunTime=System.currentTimeMillis();
if (x.equals("NULL")) {
//Continue waiting for input
}
else
StartTime = 10000; //Overload the result so the loop ends
}
while (RunTime-StartTime<5000);
rfid.close();
com.phidgets.usb.
Manager.Uninitialize();
}
catch(PhidgetException e)
{
e.printStackTrace();
}
Button mybutton = (Button) findViewById(R.id.Button1);
mybutton.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
}
});
}
}
和我的 Android 清单：
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="myFood.myFood"
android:versionCode="1"
android:versionName="1.0">
<uses-feature android:name="android.hardware.usb.host" />
<uses-sdk android:minSdkVersion="12" />
<application android:icon="@drawable/icon" android:label="@string/app_name">
<activity android:name=".myFood"
android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
<activity android:name=".AddFood" android:label="@string/app_name"
android:theme="@android:style/Theme.NoTitleBar">
</activity>
</application>
</manifest>
如果有人对 PHIDGETS 或类似的东西有任何经验，我们将不胜感激。