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我按照本教程http://vikaskanani.wordpress.com/2011/08/03/android-proper-way-to-cancel-asynctask/Json無法轉換爲int
我嘗試製作應用程序以進行登錄。當我按照這個教程時，它有錯誤。我認爲它從onProgressDialog在int success = jResponse.getInt("user");錯誤，但我不知道如何解決它。
網址進行登錄
http://192.168.10.111/user/auth/?login_id=kongkea&password=kongkea&app_id=103574020240693
（在瀏覽器）登錄成功時，返回JSON
`{
"user": {
"user_id": "15",
"firstname": "kea",
"lastname": "kong",
"gender": null,
"email": null,
"picture": null,
"total_friends": 0,
"total_cards": 0,
"friend_status": "SELF"
},
"token": "NCTak4hOqzLUMCOYkTOG1wFCqjsxI0yKM4YGGw9pa2oz8QNCNiXeWEAOBhvTOHJKAWOvXo9zy2y5Jp9MK1PuSpiT2OALXq94acWsQ1fq0axi2UCD1DENd5Kzf54JL"
}`
DashboardActivity
public class DashboardActivity extends BaseActivity {
private EditText etUsername;
private EditText etPassword;
private static String appId = "103574020240693";
private ProgressDialog progressDialog;
private static final int PROGESSDIALOG_ID = 0;
private static final int SERVER_ERROR = 1;
private static final int NETWORK_ERROR = 2;
private static final int CANCELED = 3;
private static final int SUCCESS = 4;
private String ServerResponse;
private LoginTask loginTask;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.login);
etUsername = (EditText) findViewById(R.id.loginEmail);
etPassword = (EditText) findViewById(R.id.loginPassword);
Button login_button = (Button) findViewById(R.id.btnLogin);
login_button.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if(etUsername.getText().toString().length() == 0
|| etPassword.getText().toString().length() == 0
|| appId.length() == 0){
Toast.makeText(getApplicationContext(), "Please enter username and password", Toast.LENGTH_SHORT).show();
} else {
showDialog(PROGESSDIALOG_ID);
}
}
});
isNetworkAvailable();
}
protected Dialog onCreateDialog(int id) {
switch(id){
case PROGESSDIALOG_ID:
removeDialog(PROGESSDIALOG_ID);
progressDialog = ProgressDialog.show(DashboardActivity.this, "Authenticating", "Please wait...",true,true, new OnCancelListener() {
@Override
public void onCancel(DialogInterface dialog) {
if(loginTask != null && loginTask.getStatus() != AsyncTask.Status.FINISHED)
loginTask.cancel(true);
}
});
break;
default: progressDialog = null;
}
return progressDialog;
}
@Override
protected void onPrepareDialog(int id, Dialog dialog){
switch(id){
case PROGESSDIALOG_ID:
if(loginTask != null && loginTask.getStatus() != AsyncTask.Status.FINISHED)
loginTask.cancel(true);
loginTask = new LoginTask();
loginTask.execute();
}
}
class LoginTask extends AsyncTask<Void, Integer, Void>{
@Override
protected Void doInBackground(Void... unused) {
try {
ServerResponse = null;
HttpClient httpClient = new DefaultHttpClient();
HttpContext localContext = new BasicHttpContext();
HttpGet httpGet = new HttpGet(getString(R.string.webserverurl)
+URLEncoder.encode(etUsername.getText().toString(),"UTF-8")
+"&password="+ URLEncoder.encode(etPassword.getText().toString(),"UTF-8")+"&app_id="+appId);
httpClient.getParams().setParameter(CoreProtocolPNames.USER_AGENT, "Some user agent string");
if(isCancelled()){
publishProgress(CANCELED);
return (null);
}
HttpResponse httpResponse = httpClient.execute(httpGet,localContext);
BufferedReader reader = new BufferedReader(new InputStreamReader(httpResponse.getEntity().getContent(),"UTF-8"));
ServerResponse = reader.readLine();
publishProgress(SUCCESS);
} catch (UnknownHostException e) {
removeDialog(PROGESSDIALOG_ID);
e.printStackTrace();
publishProgress(NETWORK_ERROR);
} catch (Exception e){
removeDialog(PROGESSDIALOG_ID);
e.printStackTrace();
publishProgress(SERVER_ERROR);
}
return null;
}
@Override
protected void onProgressUpdate(Integer...errorCode){
switch(errorCode[0]){
case CANCELED:
removeDialog(PROGESSDIALOG_ID);
Toast.makeText(getApplicationContext(), "Cancel by user", Toast.LENGTH_LONG).show();
break;
case NETWORK_ERROR:
removeDialog(PROGESSDIALOG_ID);
Toast.makeText(getApplicationContext(), "Network connection error", Toast.LENGTH_LONG).show();
break;
case SERVER_ERROR:
removeDialog(PROGESSDIALOG_ID);
Toast.makeText(getApplicationContext(), "Server Error", Toast.LENGTH_LONG).show();
break;
case SUCCESS:
removeDialog(PROGESSDIALOG_ID);
try {
if (ServerResponse != null) {
JSONObject jResponse = new JSONObject(ServerResponse);
String sMessage = jResponse.getString("user");
int success = jResponse.getInt("user");
if(success == 1){
DashboardActivity.this.finish();
} else {
Toast.makeText(getApplicationContext(), sMessage, Toast.LENGTH_LONG).show();
}
}
} catch (Exception e) {
Toast.makeText(getApplicationContext(), "Server Error", Toast.LENGTH_LONG).show();
e.printStackTrace();
}
break;
}
}
@Override
protected void onPostExecute(Void unused){
}
}
@Override
protected void onDestroy(){
//you may call the cancel() method but if it is not handled in doInBackground() method
if (loginTask != null && loginTask.getStatus() != AsyncTask.Status.FINISHED)
loginTask.cancel(true);
super.onDestroy();
}
}
錯誤
12-04 14:43:35.258: W/System.err(1039): org.json.JSONException: Value {"picture":null,"total_cards":0,"friend_status":"SELF","email":null,"gender":null,"lastname":"kong","user_id":"15","firstname":"kea","total_friends":0} at user of type org.json.JSONObject cannot be converted to int
12-04 14:43:35.258: W/System.err(1039): at org.json.JSON.typeMismatch(JSON.java:100)
12-04 14:43:35.258: W/System.err(1039): at org.json.JSONObject.getInt(JSONObject.java:446)
12-04 14:43:35.268: W/System.err(1039): at com.example.androidlogin.DashboardActivity$LoginTask.onProgressUpdate(DashboardActivity.java:157)
12-04 14:43:35.268: W/System.err(1039): at com.example.androidlogin.DashboardActivity$LoginTask.onProgressUpdate(DashboardActivity.java:1)
12-04 14:43:35.268: W/System.err(1039): at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:618)
12-04 14:43:35.268: W/System.err(1039): at android.os.Handler.dispatchMessage(Handler.java:99)
12-04 14:43:35.268: W/System.err(1039): at android.os.Looper.loop(Looper.java:137)
12-04 14:43:35.268: W/System.err(1039): at android.app.ActivityThread.main(ActivityThread.java:4424)
12-04 14:43:35.268: W/System.err(1039): at java.lang.reflect.Method.invokeNative(Native Method)
12-04 14:43:35.268: W/System.err(1039): at java.lang.reflect.Method.invoke(Method.java:511)
12-04 14:43:35.268: W/System.err(1039): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
12-04 14:43:35.268: W/System.err(1039): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
12-04 14:43:35.280: W/System.err(1039): at dalvik.system.NativeStart.main(Native Method)
@Vikas你能解決我的項目，我按照你的 – kongkea
您JSON格式不。你想介意去美化它嗎？ – Snicolas
你json不是一個validJson對象！ –