我正在编写一个Android项目，它现在仍在进行大约5个月。我正在开发的应用程序将允许用户从我们的公司网页http://www.allianceinmotion.com/members.asp登录并浏览其个人帐户的内容。
我刚接触编程（0经验），我在开发这个应用程序时遇到很多问题。
问题＃1。如何获取json数据响应？我正在查看浏览器的开发者工具，但我不知道我在哪里可以找到我们公司网页的必要信息。 问题＃2。我无法通过logcat从我们公司的网页上获取cookie。 问题＃3。即使登录/密码正确，我也只能看到我们的登录网页，但不能看到我帐户的内容。 问题＃4。我不确定我应该在WebView类（MyAccounts.class）上放置什么URL。以下是我的代码：
LoginActivity.java：
imports....
public class LoginActivity extends Activity implements OnClickListener {
private ProgressDialog pDialog; // Progress Dialog
private static final String LOGIN_URL = "http://vo.aimglobalinc.com/control/con_login.asp";
JSONParser jsonParser = new JSONParser();
private EditText user, pass;
private Button mSubmit, mRegister;
// <....>
class AttemptLogin extends AsyncTask<String, String, String> {
boolean failure = false;
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(LoginActivity.this);
pDialog.setMessage("Attempting to login...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
@Override
protected String doInBackground(String... args) {
//BufferedReader in = null;
try {
String username = user.getText().toString();
String password = pass.getText().toString();
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("uname", username));
params.add(new BasicNameValuePair("pword", password));
Log.d("request!", "starting");
// getting product details by making HTTP request
JSONObject json = jsonParser.makeHttpRequest(LOGIN_URL, "POST", params);
// check your log for json response
Log.d("Login attempt", json.toString());
return json.getString("success");
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
protected void onPostExecute(String result) {
super.onPostExecute(result);
//JSONObject json;
// dismiss the dialog once product deleted
pDialog.dismiss();
if (result.equals("true")) {
//Toast.makeText(LoginActivity.this, "Login Successful!", Toast.LENGTH_SHORT).show();
Toast.makeText(LoginActivity.this, "Login Successful!", Toast.LENGTH_LONG).show();
Intent i = new Intent(LoginActivity.this, MyAccounts.class);
finish();
startActivity(i);
} else {
Toast.makeText(LoginActivity.this, "Please enter the correct username and password.", Toast.LENGTH_LONG).show();
}
}
}
}
JSONParser.java
imports....
public class JSONParser {
static InputStream is = null;
static JSONObject jObj = null;
static String json = "";
// constructor
public JSONParser() {
}
public JSONObject getJSONFromUrl(final String url) {
// Making HTTP request
try {
// Construct the client and the HTTP request.
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
// Execute the POST request and store the response locally.
HttpResponse httpResponse = httpClient.execute(httpPost);
// Extract data from the response.
HttpEntity httpEntity = httpResponse.getEntity();
// Open an inputStream with the data content.
is = httpEntity.getContent();
}catch (UnsupportedEncodingException e) {
e.printStackTrace();
}catch (ClientProtocolException e) {
e.printStackTrace();
}catch (IOException e) {
e.printStackTrace();
}
try {
// Create a BufferedReader to parse through the inputStream.
BufferedReader reader = new BufferedReader(new InputStreamReader(is, "iso-8859-1"), 8);
// Declare a string builder to help with the parsing.
StringBuilder sb = new StringBuilder();
// Declare a string to store the JSON object data in string form.
String line = null;
// Build the string until null.
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
// Close the input stream
is.close();
// Convert the string builder data to an actual string.
json = sb.toString();
}catch (Exception e) {
Log.e("Buffer Error", "Error converting result " + e.toString());
}
// Try to parse the string to a JSON object
try {
jObj = new JSONObject(json);
}catch (JSONException e) {
Log.e("JSON Parser", "Error parsing data " + e.toString());
}
// Return the JSON Object.
return jObj;
}
// function get json from url
// by making HTTP POST or GET mehtod
public JSONObject makeHttpRequest(String url, String method,List<NameValuePair> params) {
// Making HTTP request
try {
// check for request method
if(method == "POST"){
// request method is POST
// defaultHttpClient
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
httpPost.setEntity(new UrlEncodedFormEntity(params));
//List<Cookie>
List<Cookie> cookies = httpClient.getCookieStore().getCookies();
if (cookies.isEmpty()) {
Log.e("COOKIES post: ", "Empty Cookies");
} else {
for (int i = 0; i < cookies.size(); i++) {
Log.e("COOKIES post: ", cookies.get(i).getName()+"--"+ cookies.get(i).getValue());
}
}
HttpResponse httpResponse = httpClient.execute(httpPost);
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
}else if(method == "GET"){
// request method is GET
DefaultHttpClient httpClient = new DefaultHttpClient();
String paramString = URLEncodedUtils.format(params, "utf-8");
url += "?" + paramString;
HttpGet httpGet = new HttpGet(url);
//List<Cookie>
List<Cookie> cookies = httpClient.getCookieStore().getCookies();
if (cookies.isEmpty()) {
Log.e("COOKIES post: ", "Empty Cookies");
} else {
for (int i = 0; i < cookies.size(); i++) {
Log.e("COOKIES post: ", cookies.get(i).getName()+"--"+ cookies.get(i).getValue());
}
}
HttpResponse httpResponse = httpClient.execute(httpGet);
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
}
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(is, "iso-8859-1"), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
json = sb.toString();
} catch (Exception e) {
Log.e("Buffer Error", "Error converting result " + e.toString());
}
// try parse the string to a JSON object
try {
jObj = new JSONObject(json);
} catch (JSONException e) {
Log.e("JSON Parser", "Error parsing data " + e.toString());
}
// return JSON String
return jObj;
}
}
MyAccounts.java - （这是用户可以看到他/她帐户内容的类）
imports...
public class MyAccounts extends Activity {
WebView myWebView;
private final static String TAG = "WebView";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_my_accounts);
myWebView = (WebView) findViewById(R.id.webView1);
new WebViewTask().execute();
}
private class WebViewTask extends AsyncTask<Void, Void, Boolean> {
String sessionCookie;
CookieManager cookieManager;
@Override
protected void onPreExecute() {
CookieSyncManager.createInstance(MyAccounts.this);
cookieManager = CookieManager.getInstance();
if (sessionCookie != null) {
/* delete old cookies */
cookieManager.removeSessionCookie();
}
super.onPreExecute();
}
protected Boolean doInBackground(Void... param) {
SystemClock.sleep(1000);
return false;
}
@Override
protected void onPostExecute(Boolean result) {
if (sessionCookie != null) {
cookieManager.setCookie("http://vo.aimglobalinc.com/r2bs.asp", sessionCookie);
CookieSyncManager.getInstance().sync();
}
WebSettings webSettings = myWebView.getSettings();
//webSettings.setJavaScriptEnabled(true);
webSettings.setBuiltInZoomControls(true);
myWebView.setWebViewClient(new WebViewClient() {
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
return super.shouldOverrideUrlLoading(view, url);
}
});
myWebView.loadUrl("http://vo.aimglobalinc.com/r2bs.asp");
}
}
}