登录按钮在连接到 Web 服务器时使应用程序崩溃
Login Button crashes the application while connecting to web server
谁能告诉我我的代码有什么问题。每次我登录时，处理都会发生 3 秒，然后应用程序崩溃。
这是我的 login.java 代码：
// Progress Dialog
private ProgressDialog pDialog;
// JSON parser class
JSONParser jsonParser = new JSONParser();
private static final String LOGIN_URL = "http://192.xxx.x.x/folder/login.php";
// JSON element ids from repsonse of php script:
private static final String TAG_SUCCESS = "success";
private static final String TAG_MESSAGE = "message";
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.login);
// setup input fields
user = (EditText) findViewById(R.id.username);
pass = (EditText) findViewById(R.id.password);
// setup buttons
mSubmit = (Button) findViewById(R.id.login);
mRegister = (Button) findViewById(R.id.register);
// register listeners
mSubmit.setOnClickListener(this);
mRegister.setOnClickListener(this);
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
switch (v.getId()) {
case R.id.login:
new AttemptLogin().execute();
break;
case R.id.register:
Intent i = new Intent(Login.this, Register.class);
startActivity(i);
break;
default:
break;
}
}
class AttemptLogin extends AsyncTask<String, String, String> {
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(Login.this);
pDialog.setMessage("Attempting login...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
@Override
protected String doInBackground(String... args) {
// TODO Auto-generated method stub
// Check for success tag
int success;
String username = user.getText().toString();
String password = pass.getText().toString();
try {
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("username", username));
params.add(new BasicNameValuePair("password", 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());
// json success tag
success = json.getInt(TAG_SUCCESS);
if (success == 1) {
Log.d("Login Successful!", json.toString());
// save user data
SharedPreferences sp = PreferenceManager
.getDefaultSharedPreferences(Login.this);
Editor edit = sp.edit();
edit.putString("username", username);
edit.commit();
Intent i = new Intent(Login.this, ReadComments.class);
finish();
startActivity(i);
return json.getString(TAG_MESSAGE);
} else {
Log.d("Login Failure!", json.getString(TAG_MESSAGE));
return json.getString(TAG_MESSAGE);
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
protected void onPostExecute(String file_url) {
// dismiss the dialog once product deleted
pDialog.dismiss();
if (file_url != null) {
Toast.makeText(Login.this, file_url, Toast.LENGTH_LONG).show();
}
}
}
}
这是logcat:
03-11 23:41:27.361: E/WindowManager(5591): Activity xxx.xx..Login has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView{418aa1d0 V.E..... R......D 0,0-456,144} that was originally added here
03-11 23:41:27.361: E/WindowManager(5591): android.view.WindowLeaked: Activity com.ss.appsec.Login has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView{418aa1d0 V.E..... R......D 0,0-456,144} that was originally added here
03-11 23:41:27.361: E/WindowManager(5591): at android.view.ViewRootImpl.<init>(ViewRootImpl.java:409)
03-11 23:41:27.361: E/WindowManager(5591): at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:218)
03-11 23:41:27.361: E/WindowManager(5591): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:69)
03-11 23:41:27.361: E/WindowManager(5591): at android.app.Dialog.show(Dialog.java:281)
03-11 23:41:27.361: E/WindowManager(5591): at com.ss.appsec.Login$AttemptLogin.onPreExecute(Login.java:105)
03-11 23:41:27.361: E/WindowManager(5591): at android.os.AsyncTask.executeOnExecutor(AsyncTask.java:586)
03-11 23:41:27.361: E/WindowManager(5591): at android.os.AsyncTask.execute(AsyncTask.java:534)
03-11 23:41:27.361: E/WindowManager(5591): at com.xx.xxx.Login.onClick(Login.java:83)
03-11 23:41:27.361: E/WindowManager(5591): at android.view.View.performClick(View.java:4211)
03-11 23:41:27.361: E/WindowManager(5591): at android.view.View$PerformClick.run(View.java:17446)
03-11 23:41:27.361: E/WindowManager(5591): at android.os.Handler.handleCallback(Handler.java:725)
03-11 23:41:27.361: E/WindowManager(5591): at android.os.Handler.dispatchMessage(Handler.java:92)
03-11 23:41:27.361: E/WindowManager(5591): at android.os.Looper.loop(Looper.java:153)
03-11 23:41:27.361: E/WindowManager(5591): at android.app.ActivityThread.main(ActivityThread.java:5336)
03-11 23:41:27.361: E/WindowManager(5591): at java.lang.reflect.Method.invokeNative(Native Method)
03-11 23:41:27.361: E/WindowManager(5591): at java.lang.reflect.Method.invoke(Method.java:511)
03-11 23:41:27.361: E/WindowManager(5591): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:833)
03-11 23:41:27.361: E/WindowManager(5591): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)
03-11 23:41:27.361: E/WindowManager(5591): at dalvik.system.NativeStart.main(Native Method)
03-11 23:41:27.361: D/OpenGLRenderer(5591): Flushing caches (mode 0)
03-11 23:41:27.362: W/Trace(5591): Unexpected value from nativeGetEnabledTags: 0
在 post 关闭进度对话框后执行
添加您的 Intent
谁能告诉我我的代码有什么问题。每次我登录时，处理都会发生 3 秒，然后应用程序崩溃。
这是我的 login.java 代码：
// Progress Dialog
private ProgressDialog pDialog;
// JSON parser class
JSONParser jsonParser = new JSONParser();
private static final String LOGIN_URL = "http://192.xxx.x.x/folder/login.php";
// JSON element ids from repsonse of php script:
private static final String TAG_SUCCESS = "success";
private static final String TAG_MESSAGE = "message";
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.login);
// setup input fields
user = (EditText) findViewById(R.id.username);
pass = (EditText) findViewById(R.id.password);
// setup buttons
mSubmit = (Button) findViewById(R.id.login);
mRegister = (Button) findViewById(R.id.register);
// register listeners
mSubmit.setOnClickListener(this);
mRegister.setOnClickListener(this);
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
switch (v.getId()) {
case R.id.login:
new AttemptLogin().execute();
break;
case R.id.register:
Intent i = new Intent(Login.this, Register.class);
startActivity(i);
break;
default:
break;
}
}
class AttemptLogin extends AsyncTask<String, String, String> {
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(Login.this);
pDialog.setMessage("Attempting login...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
@Override
protected String doInBackground(String... args) {
// TODO Auto-generated method stub
// Check for success tag
int success;
String username = user.getText().toString();
String password = pass.getText().toString();
try {
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("username", username));
params.add(new BasicNameValuePair("password", 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());
// json success tag
success = json.getInt(TAG_SUCCESS);
if (success == 1) {
Log.d("Login Successful!", json.toString());
// save user data
SharedPreferences sp = PreferenceManager
.getDefaultSharedPreferences(Login.this);
Editor edit = sp.edit();
edit.putString("username", username);
edit.commit();
Intent i = new Intent(Login.this, ReadComments.class);
finish();
startActivity(i);
return json.getString(TAG_MESSAGE);
} else {
Log.d("Login Failure!", json.getString(TAG_MESSAGE));
return json.getString(TAG_MESSAGE);
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
protected void onPostExecute(String file_url) {
// dismiss the dialog once product deleted
pDialog.dismiss();
if (file_url != null) {
Toast.makeText(Login.this, file_url, Toast.LENGTH_LONG).show();
}
}
}
}
这是logcat:
03-11 23:41:27.361: E/WindowManager(5591): Activity xxx.xx..Login has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView{418aa1d0 V.E..... R......D 0,0-456,144} that was originally added here
03-11 23:41:27.361: E/WindowManager(5591): android.view.WindowLeaked: Activity com.ss.appsec.Login has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView{418aa1d0 V.E..... R......D 0,0-456,144} that was originally added here
03-11 23:41:27.361: E/WindowManager(5591): at android.view.ViewRootImpl.<init>(ViewRootImpl.java:409)
03-11 23:41:27.361: E/WindowManager(5591): at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:218)
03-11 23:41:27.361: E/WindowManager(5591): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:69)
03-11 23:41:27.361: E/WindowManager(5591): at android.app.Dialog.show(Dialog.java:281)
03-11 23:41:27.361: E/WindowManager(5591): at com.ss.appsec.Login$AttemptLogin.onPreExecute(Login.java:105)
03-11 23:41:27.361: E/WindowManager(5591): at android.os.AsyncTask.executeOnExecutor(AsyncTask.java:586)
03-11 23:41:27.361: E/WindowManager(5591): at android.os.AsyncTask.execute(AsyncTask.java:534)
03-11 23:41:27.361: E/WindowManager(5591): at com.xx.xxx.Login.onClick(Login.java:83)
03-11 23:41:27.361: E/WindowManager(5591): at android.view.View.performClick(View.java:4211)
03-11 23:41:27.361: E/WindowManager(5591): at android.view.View$PerformClick.run(View.java:17446)
03-11 23:41:27.361: E/WindowManager(5591): at android.os.Handler.handleCallback(Handler.java:725)
03-11 23:41:27.361: E/WindowManager(5591): at android.os.Handler.dispatchMessage(Handler.java:92)
03-11 23:41:27.361: E/WindowManager(5591): at android.os.Looper.loop(Looper.java:153)
03-11 23:41:27.361: E/WindowManager(5591): at android.app.ActivityThread.main(ActivityThread.java:5336)
03-11 23:41:27.361: E/WindowManager(5591): at java.lang.reflect.Method.invokeNative(Native Method)
03-11 23:41:27.361: E/WindowManager(5591): at java.lang.reflect.Method.invoke(Method.java:511)
03-11 23:41:27.361: E/WindowManager(5591): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:833)
03-11 23:41:27.361: E/WindowManager(5591): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)
03-11 23:41:27.361: E/WindowManager(5591): at dalvik.system.NativeStart.main(Native Method)
03-11 23:41:27.361: D/OpenGLRenderer(5591): Flushing caches (mode 0)
03-11 23:41:27.362: W/Trace(5591): Unexpected value from nativeGetEnabledTags: 0
在 post 关闭进度对话框后执行
添加您的 Intent