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2013-10-03T13:09:22.430
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Splash pages are not recommended according to the Android Design Guidelines: <a href="http://developer.android.com/design/patterns/help.html" rel="nofollow">http://developer.android.com/design/patterns/help.html</a>. Why do you want to make a user wait 5 seconds to access your app? I have commented your code with my feedback/answers. Just use SharedPreferences. That is the easiest way: <pre><code>public class SplashScreen extends Activity { private long splashDelay = 5000; //5 seconds private Activity splashScreen; private Intent intent; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.splash_screen); splashScreen = this; // get your shared preferences stored in your app. If the username has been // set then this user has already logged in SharedPreferences prefs = getSharedPreferences("name_for_file", 0); // return the username of null if none exists String username = prefs.getString("username", null); // if user has already logged in, just go to MainActivity if (username == null) { intent = new Intent(this, LoginActivity.class); } else { intent = new Intent(this, MainActivity.class); } TimerTask task = new TimerTask() { @Override public void run() { //finish(); <- you don't need to call finish, the OS takes care of that splashScreen.startActivity(intent); } }; Timer timer = new Timer(); timer.schedule(task, splashDelay); } } public class LoginActivity extends Activity { Intent i; Button signin, signup; CheckBox check; String name = "", pass = ""; byte[] data; HttpPost httppost; StringBuffer buffer; HttpResponse response; HttpClient httpclient; InputStream inputStream; SharedPreferences app_preferences; List<NameValuePair> nameValuePairs; EditText editTextId, editTextP; Activity loginActivity; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.login); loginActivity = this; signin = (Button) findViewById(R.id.signin); signup = (Button) findViewById(R.id.signup); editTextId = (EditText) findViewById(R.id.editTextId); editTextP = (EditText) findViewById(R.id.editTextP); // app_preferences = PreferenceManager.getDefaultSharedPreferences(this); app_preferences = getSharedPreferences("name_of_file", 0); check = (CheckBox) findViewById(R.id.check); // if they got to this activity they are not logged in, so why are you // checking here? // the common pattern is to use null // String Str_user = app_preferences.getString("username", null); // String Str_pass = app_preferences.getString("password", null); // checked only has two states, use a boolean // boolean Str_check = app_preferences.getBoolean("checked", false); // if (Str_check)) { // editTextId.setText(Str_user); // editTextP.setText(Str_pass); // check.setChecked(true); // } signin.setOnClickListener(new OnClickListener() { @Override public void onClick(View view) { LoginTask login = new LoginTask(); login.execute(); } }); signup.setOnClickListener(new OnClickListener() { @Override public void onClick(View view) { Intent intent = new Intent(this, SignUpActivity.class) startActivity(intent); } }); } // why are you sending them back to the splash? public void Move_to_next() { final Handler handle = new Handler(); Runnable delay = new Runnable() { public void run() { startActivity(new Intent(LoginActivity.this, SplashActivity.class)); finish(); } }; //why are you making people wait? handle.postDelayed(delay,2000); } // This is never being called public void Move_next() { startActivity(new Intent(LoginActivity.this, SignUpActivity.class)); //finish(); <- the OS will do this } @SuppressLint("NewApi") private class LoginTask extends AsyncTask <Void, Void, String> { @SuppressLint("NewApi") @Override protected void onPreExecute() { super.onPreExecute(); // Show progress dialog here } // best practice for android is to use HttpUrlConnection: // http://android-developers.blogspot.com/2011/09/androids-http-clients.html // there is also AndroidHttpClient, which is the class google used in their // Google IO 2013 app. It is pretty clean. https://code.google.com/p/basic-http-client/ /* AndroidHttpClient httpClient = new AndroidHttpClient("http://www.google.com"); ParameterMap params = httpClient.newParams().add("q", "GOOG"); httpClient.setMaxRetries(3); httpClient.get("/finance", params, new AsyncCallback() { public void onComplete(HttpResponse httpResponse) { System.out.println(httpResponse.getBodyAsString()); } public void onError(Exception e) { e.printStackTrace(); } }); */ @Override protected String doInBackground(Void... arg0) { try { httpclient = new DefaultHttpClient(); httppost = new HttpPost("http://xxx/login1.php"); // Add your data nameValuePairs = new ArrayList<NameValuePair>(2); nameValuePairs.add(new BasicNameValuePair("UserEmail", name.trim())); nameValuePairs.add(new BasicNameValuePair("Password", pass.trim())); httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs)); // Execute HTTP Post Request response = httpclient.execute(httppost); inputStream = response.getEntity().getContent(); data = new byte[256]; buffer = new StringBuffer(); int len = 0; while (-1 != (len = inputStream.read(data))) { buffer.append(new String(data, 0, len)); } inputStream.close(); return buffer.toString(); } catch (Exception e) { e.printStackTrace(); } return ""; } @SuppressLint("NewApi") @Override protected void onPostExecute(String result) { super.onPostExecute(result); // Hide progress dialog here if (buffer.charAt(0) == 'Y') { Toast.makeText(LoginActivity.this, "login successful", Toast.LENGTH_SHORT).show(); // don't send them back to the splash, they are logged in // save username and pass, and move forward SharedPreferences settings = loginActivity.getSharedPreferences("name_of_file", 0); SharedPreferences.Editor editor = settings.edit(); editor.putString("username", put whatever you get from server).commit(); editor.putString("password", put whatever you get from server).commit(); Intent intent = new Intent(loginActivity, WelcomeActivity.class); startActivity(intent); } else { Toast.makeText(LoginActivity.this, "Invalid Username or password", Toast.LENGTH_SHORT).show(); } } } </code></pre>
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