我有一个 XML 文件，其中包含我需要在我的应用程序中解析的数据，但是当我尝试调试时，这些值一直显示为空，尽管我已经验证我可以访问服务器上的 XML 文件。
我不断地在我的 logcat 中得到这个，它会在我的代码中导致其他问题：
08-13 17:56:39.452: I/System.out(1424): STREAM DEBUG
08-13 17:56:39.452: I/System.out(1424): null
非常感谢任何建议。
相关来源片段：
public class ConfigFinalActivity extends Activity implements OnClickListener {
private static final String TAG = "ConfigActivity";
TelephonyManager tm;
AlertDialog mErrorAlert = null;
private Notification mNotification = null;
private Button assist_update_btn = null;
// Progress
private ImageView mProgressImageview1;
private ImageView mProgressImageview2;
private ImageView mProgressImageview3;
private ImageView mProgressImageview4;
private ImageView mProgressImageview5;
private int mInstructionNumber = 0;
UpdateActivity update;
public ArrayList<String> ValueArr = new ArrayList<String>();
public ArrayList<String> nameArr = new ArrayList<String>(5);
public ArrayList<String> ApnArr = new ArrayList<String>();
public ArrayList<String> mmscArr = new ArrayList<String>();
public ArrayList<String> mmsportArr = new ArrayList<String>();
public ArrayList<String> mmsproxyArr = new ArrayList<String>();
public ArrayList<String> portArr = new ArrayList<String>();
public ArrayList<String> proxyArr = new ArrayList<String>();
private Button mAssistInstrButton = null;
private TextView mReadAgainButton = null;
public static int TotalSteps = 8;
public static int count;
int i, g = 0;
Context ctx;
public static ContentValues Values = new ContentValues();
XmlParserHandlerFinal handler;
public static BigInteger id1, id2;
BigInteger[] id;
public static Integer mdn1, mdn2;
public static String car;
public static final Uri APN_TABLE_URI = Uri
.parse("content://telephony/carriers");
public static String Base_URL = "https://www.mysettings.com/";
//NetworkTask task = new NetworkTask();
NetworkTask tasks = new NetworkTask();
InputStream stream = null;
private AnimationDrawable loadingAnimation;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
int version = android.os.Build.VERSION.SDK_INT;
tm = (TelephonyManager) getSystemService(TELEPHONY_SERVICE);
int networkType = tm.getNetworkType();
int phoneType = tm.getPhoneType();
tasks = new NetworkTask();
handler = new XmlParserHandlerFinal();
handler.setContext(ctx);
getImpVariablesForQuery();
if (version < VERSION_CODES.ICE_CREAM_SANDWICH) {
try {
// updating layout initially has updating text with 1 dot in the
// xml
setContentView(R.layout.updating);
// This image view has the updating text to be progressively
// updated
// with dots addition
ImageView loading = (ImageView) findViewById(R.id.loading_empty1);
// Set updating button to drawable animation
loading.setBackgroundResource(R.drawable.updating1);
loadingAnimation = (AnimationDrawable) loading.getBackground();
ImageView loading2 = (ImageView) findViewById(R.id.loading_empty2);
// Set updating button to drawable animation
loading2.setBackgroundResource(R.drawable.updating2);
loadingAnimation = (AnimationDrawable) loading2.getBackground();
ImageView loading3 = (ImageView) findViewById(R.id.loading_empty3);
// Set updating button to drawable animation
loading.setBackgroundResource(R.drawable.updating3);
loadingAnimation = (AnimationDrawable) loading.getBackground();
ImageView loading4 = (ImageView) findViewById(R.id.loading_empty4);
// Set updating button to drawable animation
loading.setBackgroundResource(R.drawable.updating4);
loadingAnimation = (AnimationDrawable) loading.getBackground();
ImageView loading5 = (ImageView) findViewById(R.id.loading_empty5);
// Set updating button to drawable animation
loading.setBackgroundResource(R.drawable.updating5);
loadingAnimation = (AnimationDrawable) loading.getBackground();
tasks.execute("http://datasettings.site90.net/GetPhoneSettings-ST-rsp-eng.xml");
if (tasks.get() != null) {
stream = tasks.getInputStream();
Log.v("CfA", "here");
} else if (tasks.get() == null) {
setContentView(R.layout.error);
// finish();
// finish();
}
handler.getQueryResponse(stream);
Values = getContentValues();
} catch (SAXException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ExecutionException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// Update APN table in separate thread
new TableUpdateRequestTask().execute("");
} else {// ICS and later versions
tasks.execute("http://datasettings.site90.net/GetPhoneSettings-ST-rsp-eng.xml");
System.out.println("STREAM DEBUG");
System.out.println(stream);
try {
if (tasks.get() != null) {
stream = tasks.getInputStream();
Log.v("CfA", "here");
} else if (tasks.get() == null) {
setContentView(R.layout.error);
}
} catch (InterruptedException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (ExecutionException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
// startActivity(new Intent(Settings.ACTION_APN_SETTINGS));
try {
System.out.println("STREAM DEBUG2");
System.out.println(stream);
handler.getQueryResponse(stream);
// System.out.println("STREAM DEBUG");
//System.out.println(stream);
System.out.println(nameArr);
System.out.println(ApnArr);
System.out.println(mmscArr);
System.out.println(mmsproxyArr);
System.out.println(mmsportArr);
System.out.println(count);
System.out.println(proxyArr);
System.out.println(portArr);
Values = getContentValues();
showNotification();
} catch (SAXException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ParserConfigurationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
new TableUpdateRequestTask().execute("");
}
}