無法通過變量傳遞變量以顯示在Android屏幕上android

Question

我在開發Android應用程序時遇到問題，我目前使用Eclipse和Phidg​​et RFID。我的目標是在Android設備上的一段文字中顯示RFID的ID。

我已經設法通過println在以下幾段代碼中顯示ID。

package myFood.myFood; 

import com.phidgets.*; 
import com.phidgets.event.*; 
public class RFID { 
static String x ="NULL"; 
public static final Object main(String args[]) throws Exception { 
    RFIDPhidget rfid; 
    rfid = new RFIDPhidget(); 
    rfid.openAny(); 

    //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(); 
     } 
    }); 

    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(); 
    return x; 
} 

} 

然後。

package myFood.myFood; 

public class RFIDresult { 

public static final Object main(String args[]) throws Exception { 
    System.out.println("Results"); 
Object x = RFID.main(args); 
System.out.println(x); 
return x; 
} 
} 

但是我想，所以我試圖開發所述第二片的代碼到的Android要顯示在一段文本的ID。

package myFood.myFood; 

import android.app.Activity; 
import android.content.Intent; 
import android.os.Bundle; 
import android.view.View; 
import android.widget.Button; 
import android.widget.TextView; 

public class AddFood extends Activity { 
    /** Called when the activity is first created. */ 
@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.addfood); 



    Button mybutton = (Button) findViewById(R.id.Button1); 
    mybutton.setOnClickListener(new View.OnClickListener() { 
     public void onClick(View view) { 

      String[] args = null; 
      Object x = null; 
      try { 
       x = RFID.main(args); 
      } catch (Exception e) { 
       // TODO Auto-generated catch block 
       e.printStackTrace(); 
      } 

    TextView mytext=(TextView)findViewById(R.id.widget96); 
    mytext.setText((CharSequence) x); 


    } 


    }); 
} 

} 

而這只是產生一個力量關閉。我在這方面有點新手，並會欣賞我所得到的所有建議。

---

LogCat Report;

ERROR/AndroidRuntime(519): FATAL EXCEPTION: main 
ERROR/AndroidRuntime(519): java.lang.ExceptionInInitializerError 
ERROR/AndroidRuntime(519):  at myFood.myFood.RFID.main(RFID.java:9) 
ERROR/AndroidRuntime(519):  at myFood.myFood.AddFood$1.onClick(AddFood.java:26)<br/> 
ERROR/AndroidRuntime(519):  at android.view.View.performClick(View.java:2408) 
ERROR/AndroidRuntime(519):  at android.view.View$PerformClick.run(View.java:8816) 
ERROR/AndroidRuntime(519):  at android.os.Handler.handleCallback(Handler.java:587) 
ERROR/AndroidRuntime(519):  at android.os.Handler.dispatchMessage(Handler.java:92) 
ERROR/AndroidRuntime(519):  at android.os.Looper.loop(Looper.java:123) 
ERROR/AndroidRuntime(519): at  android.app.ActivityThread.main(ActivityThread.java:4627) 
ERROR/AndroidRuntime(519):  at java.lang.reflect.Method.invokeNative(Native Method) 
ERROR/AndroidRuntime(519):  at java.lang.reflect.Method.invoke(Method.java:521) 
ERROR/AndroidRuntime(519):  at om.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 
ERROR/AndroidRuntime(519):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 
ERROR/AndroidRuntime(519):  at dalvik.system.NativeStart.main(Native Method) 
ERROR/AndroidRuntime(519): Caused by: java.lang.ExceptionInInitializerError: Library phidget21 not found 
ERROR/AndroidRuntime(519): Could not locate the Phidget C library (libphidget21.so). 
ERROR/AndroidRuntime(519): Make sure it is installed, and add it's path to LD_LIBRARY_PATH. 
ERROR/AndroidRuntime(519):  at com.phidgets.Phidget.<clinit>(Phidget.java:34) 
ERROR/AndroidRuntime(519):  ... 13 more 

Answer 1

您需要從 '查看' 參數會將myText獲得。試試這個：

TextView mytext=(TextView)**view**.findViewById(R.id.widget96);