我收到错误，说明This method must return a result of type InputStream
但是我已经将InputStream的return语句添加到source方法中。所以我不确定为什么会出现这个问题。 （当我尝试在我当前的源中集成以前使用的发布进度方法时，问题就开始了。）
来源：
/*
* Sends a query to server and gets back the parsed results in a bundle
* urlQueryString - URL for calling the webservice
*/
protected synchronized InputStream getQueryResults(String urlQueryString)
throws IOException, SAXException, SSLException,
SocketTimeoutException, Exception {
try {
// HttpsURLConnection https = null;
String uri = urlQueryString;
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
BasicNameValuePair mdn1, mdn2,id1,id2;
if (MDN.equals("")) {
mdn1 = new BasicNameValuePair("mdn1", null);
mdn2 = new BasicNameValuePair("mdn2", null);
} else {
mdn1 = new BasicNameValuePair("mdn1", mdN1.toString());
mdn2 = new BasicNameValuePair("mdn2", mdN2.toString());
}
BasicNameValuePair car = new BasicNameValuePair("car", caR);
if (ICCID.equals("")) {
id1 = new BasicNameValuePair("id1", null);
id2 = new BasicNameValuePair("id2", null);
} else {
id1 = new BasicNameValuePair("id1",
iD1.toString());
id2 = new BasicNameValuePair("id2",
iD2.toString());
}
nameValuePairs.add(mdn1);
nameValuePairs.add(mdn2);
nameValuePairs.add(car);
nameValuePairs.add(id1);
nameValuePairs.add(id2);
UrlEncodedFormEntity urlEncodedFormEntity = new UrlEncodedFormEntity(
nameValuePairs, "ISO-8859-1");
KeyStore trustStore = KeyStore.getInstance(KeyStore
.getDefaultType());
trustStore.load(null, null);
SSLSocketFactory sf = new MySSLSocketFactory(trustStore);
sf.setHostnameVerifier(SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);
HttpParams params = new BasicHttpParams();
HttpProtocolParams.setVersion(params, HttpVersion.HTTP_1_1);
HttpProtocolParams.setContentCharset(params, HTTP.UTF_8);
SchemeRegistry registry = new SchemeRegistry();
registry.register(new Scheme("http", PlainSocketFactory
.getSocketFactory(), 80));
registry.register(new Scheme("https", sf, 443));
ClientConnectionManager ccm = new ThreadSafeClientConnManager(
params, registry);
HttpClient httpClient = new DefaultHttpClient(ccm, params);
params = httpClient.getParams();
HttpClientParams.setRedirecting(params, true);
HttpPost httpPost = new HttpPost(uri);
httpPost.addHeader("Authorization",
getB64Auth("nmundru", "abc123"));
httpPost.setHeader("Content-Type", "text/plain; charset=utf-8");
Log.v("httpPost", httpPost.toString());
httpPost.setEntity(urlEncodedFormEntity);
HttpResponse httpResponse = httpClient.execute(httpPost);
System.out.println("response...." + httpResponse.toString());
Log.v("response...", httpResponse.toString());
stream = httpResponse.getEntity().getContent();
// save the InputStream in a file
try {
FileOutputStream fOut = openFileOutput("settings.xml",
Context.MODE_WORLD_READABLE);
DataInputStream in = new DataInputStream(stream);
BufferedReader br = new BufferedReader(
new InputStreamReader(in));
String strLine;
while ((strLine = br.readLine()) != null) {
System.out.println(strLine); //to print the response
// in logcat
fOut.write(strLine.getBytes());
}
fOut.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
fis = openFileInput("settings.xml");
} catch (Exception e) {
Log.e(LOG_TAG, e.toString());
// e.printStackTrace();
tryagain();
} finally {
// https.disconnect();
}
publishProgress(R.drawable.loading_full,
R.drawable.loading_empty, R.drawable.loading_empty,
R.drawable.loading_empty, R.drawable.loading_empty);
try {
Thread.sleep(500);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
}
publishProgress(R.drawable.loading_full,
R.drawable.loading_full, R.drawable.loading_empty,
R.drawable.loading_empty, R.drawable.loading_empty);
try {
Thread.sleep(500);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
}
publishProgress(R.drawable.loading_full,
R.drawable.loading_full, R.drawable.loading_full,
R.drawable.loading_empty, R.drawable.loading_empty);
try {
Thread.sleep(500);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
}
publishProgress(R.drawable.loading_full,
R.drawable.loading_full, R.drawable.loading_full,
R.drawable.loading_full, R.drawable.loading_empty);
try {
Thread.sleep(500);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
}
publishProgress(R.drawable.loading_full,
R.drawable.loading_full, R.drawable.loading_full,
R.drawable.loading_full, R.drawable.loading_full);
// Sleep for 1/2 second
try {
Thread.sleep(500);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
return stream;
}
}
答案 0 :(得分：4)
目前，如果最终 所以不要这样： 你想： 如果你已经适当地格式化了你的代码 - 你的IDE会乐意为你做的 - 你可以为自己更清楚地看到这一点，我怀疑。try块抛出InterruptedException，您只返回流，因为您的return语句位于catch块中。我想你的意思是稍后将return语句放在一个大括号 - 之后的<{em} catch块。否则，try / catch语句的结尾是可以访问的（因为try块可能不会抛出异常），这意味着你可以在不返回任何内容的情况下到达方法的末尾 - 这就是编译器抱怨的内容。 / p>
protected synchronized InputStream getQueryResults(...) {
...
// Indentation fixed for clarity
try {
Thread.sleep(500);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
return stream;
}
}
protected synchronized InputStream getQueryResults(...) {
...
try {
Thread.sleep(500);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
}
return stream;
}
答案 1 :(得分：3)
而不是：
return stream;
}
}
这样做：
}
return stream;
}