Java tutorial
/* * Copyright (C) 2014 Princewill Chibututu Okorie * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package prince.app.ccm; import java.io.BufferedReader; import java.io.ByteArrayInputStream; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.util.ArrayList; import java.util.List; import org.apache.http.HttpResponse; import org.apache.http.NameValuePair; import org.apache.http.client.HttpClient; import org.apache.http.client.entity.UrlEncodedFormEntity; import org.apache.http.client.methods.HttpPost; import org.apache.http.impl.client.DefaultHttpClient; import org.apache.http.message.BasicNameValuePair; import org.apache.http.protocol.BasicHttpContext; import org.apache.http.protocol.HTTP; import org.apache.http.protocol.HttpContext; import org.apache.http.util.EntityUtils; import prince.app.ccm.tools.AsyncSession; import prince.app.ccm.tools.AsyncSession.AsyncCallback; import prince.app.ccm.tools.Tool; import prince.app.ccm.util.Util; import android.animation.Animator; import android.animation.AnimatorListenerAdapter; import android.annotation.TargetApi; import android.content.Context; import android.content.Intent; import android.os.AsyncTask; import android.os.Build; import android.os.Bundle; import android.support.v4.app.Fragment; import android.text.InputType; import android.text.TextUtils; import android.util.Log; import android.view.KeyEvent; import android.view.LayoutInflater; import android.view.View; import android.view.View.OnFocusChangeListener; import android.view.ViewGroup; import android.view.WindowManager; import android.view.inputmethod.EditorInfo; import android.view.inputmethod.InputMethodManager; import android.widget.CheckBox; import android.widget.CompoundButton; import android.widget.CompoundButton.OnCheckedChangeListener; import android.widget.EditText; import android.widget.TextView; import android.widget.Toast; public class Fragment_Log extends Fragment { /** * Method to create a new instance of the fragment * @return - a new and final instance of the fragment class */ public static Fragment_Log newInstance() { final Fragment_Log aX = new Fragment_Log(); return aX; } // Values for email and password at the time of the login attempt. private String mUserName; private String mPassword; // UI references. private EditText mUserEditText; private EditText mPasswordEditText; private View mLoginFormView; private View mLoginStatusView; private CheckBox mRemind; private CheckBox mShowPassword; private static final String TAG = Fragment_Log.class.getSimpleName(); private static final String URL = "http://www.iglesiamallorca.com/av_contrasena.php"; /** * Keep track of the login task to ensure we can cancel it if requested. */ private AsyncSession mAuthTask = null; @Override public void onCreate(Bundle oldState) { super.onCreate(oldState); setRetainInstance(true); setUpListener(); } private void setUpListener() { AsyncSession.setCallback(new AsyncCallback() { @Override public void onPostExecute(boolean result) { if (result) { saveCredentials(); Tool.getInstance().modBolPref(Util.SIGN_IN, true); Intent intent = new Intent(getActivity(), Activity_Main.class); intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); startActivity(intent); } else { if (!Tool.getInstance().isConnection()) { Toast.makeText(getActivity(), getResources().getString(R.string.no_connection), Toast.LENGTH_LONG).show(); } else { Toast.makeText(getActivity(), getResources().getString(R.string.user_passwd_error), Toast.LENGTH_LONG).show(); } onCancel(); } } @Override public void onCancel() { mAuthTask = null; showProgress(false); } }); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup parent, Bundle oldState) { super.onCreateView(inflater, parent, oldState); View view = inflater.inflate(R.layout.layout_log, parent, false); initView(view); return view; } private void initView(View view) { // Set up the login form. mUserEditText = (EditText) view.findViewById(R.id.username); // addFocusListener(mUserEditText); mPasswordEditText = (EditText) view.findViewById(R.id.password); // addFocusListener(mPasswordEditText); mPasswordEditText.setOnEditorActionListener(new TextView.OnEditorActionListener() { @Override public boolean onEditorAction(TextView textView, int id, KeyEvent keyEvent) { if (id == R.id.user_login || id == EditorInfo.IME_NULL) { if (!Tool.getInstance().isConnection()) Toast.makeText(getActivity(), "No network connection!", Toast.LENGTH_SHORT).show(); else { attemptLogin(); return true; } } return false; } }); mLoginFormView = view.findViewById(R.id.login_form); mLoginStatusView = view.findViewById(R.id.login_progress); view.findViewById(R.id.sign_in_button).setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { InputMethodManager imm = (InputMethodManager) getActivity() .getSystemService(Context.INPUT_METHOD_SERVICE); imm.hideSoftInputFromWindow(view.getWindowToken(), 0); attemptLogin(); } }); mRemind = (CheckBox) view.findViewById(R.id.box_remember); if (Tool.getInstance().getBolPref(Util.REMIND)) { mRemind.setChecked(true); mUserEditText.setText(""); mPasswordEditText.setText(""); mUserEditText.append(Tool.getInstance().getStringPref(Util.USER)); mPasswordEditText.append(Tool.getInstance().getStringPref(Util.PASSWORD)); } mShowPassword = (CheckBox) view.findViewById(R.id.box_reveal); mShowPassword.setOnCheckedChangeListener(new OnCheckedChangeListener() { @Override public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { if (isChecked) { mPasswordEditText.setInputType(InputType.TYPE_TEXT_VARIATION_PASSWORD); } else { mPasswordEditText .setInputType(InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_PASSWORD); } if (mPasswordEditText.hasFocus()) { String temp = mPasswordEditText.getText().toString().trim(); mPasswordEditText.setText(""); mPasswordEditText.append(temp); } } }); } public void addFocusListener(EditText xT) { xT.setOnFocusChangeListener(new OnFocusChangeListener() { @Override public void onFocusChange(View v, boolean hasFocus) { if (!hasFocus) { InputMethodManager imm = (InputMethodManager) getActivity() .getSystemService(Context.INPUT_METHOD_SERVICE); imm.hideSoftInputFromWindow(v.getWindowToken(), 0); } else { getActivity().getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_VISIBLE); } } }); } /** * Attempts to sign in or register the account specified by the login form. * If there are form errors (invalid email, missing fields, etc.), the * errors are presented and no actual login attempt is made. */ public void attemptLogin() { if (mAuthTask != null) { return; } Log.e(TAG, "Attempting Login"); // Reset errors. mUserEditText.setError(null); mPasswordEditText.setError(null); // Store values at the time of the login attempt. mUserName = mUserEditText.getText().toString(); mPassword = mPasswordEditText.getText().toString(); boolean cancel = false; View focusView = null; // Check for a valid password. if (TextUtils.isEmpty(mPassword)) { mPasswordEditText.setError(getString(R.string.error_field_required)); focusView = mPasswordEditText; cancel = true; } else if (mPassword.length() < 4) { mPasswordEditText.setError(getString(R.string.error_incorrect_password)); focusView = mPasswordEditText; cancel = true; } // Check for a valid email address. if (TextUtils.isEmpty(mUserName)) { mUserEditText.setError(getString(R.string.error_field_required)); focusView = mUserEditText; cancel = true; } if (cancel) { // There was an error; don't attempt login and focus the first // form field with an error. focusView.requestFocus(); } else { // Show a progress spinner, and kick off a background task to // perform the user login attempt. showProgress(true); mAuthTask = new AsyncSession(mUserEditText.getText().toString().trim(), mPasswordEditText.getText().toString().trim()); mAuthTask.execute(); } } /** save the user name and password */ private void saveCredentials() { if (mRemind.isChecked()) { Tool.getInstance().modStringPref(Util.USER, mUserName); Tool.getInstance().modStringPref(Util.PASSWORD, mPassword); Tool.getInstance().modBolPref(Util.REMIND, true); } else { if (Tool.getInstance().prefExist(Util.REMIND)) { Tool.getInstance().modBolPref(Util.REMIND, false); } } } /** * Shows the progress UI and hides the login form. */ @TargetApi(Build.VERSION_CODES.HONEYCOMB_MR2) private void showProgress(final boolean show) { // On Honeycomb MR2 we have the ViewPropertyAnimator APIs, which allow // for very easy animations. If available, use these APIs to fade-in // the progress spinner. if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB_MR2) { int shortAnimTime = getResources().getInteger(android.R.integer.config_shortAnimTime); mLoginStatusView.setVisibility(View.VISIBLE); mLoginStatusView.animate().setDuration(shortAnimTime).alpha(show ? 1 : 0) .setListener(new AnimatorListenerAdapter() { @Override public void onAnimationEnd(Animator animation) { mLoginStatusView.setVisibility(show ? View.VISIBLE : View.GONE); } }); mLoginFormView.setVisibility(View.VISIBLE); mLoginFormView.animate().setDuration(shortAnimTime).alpha(show ? 0 : 1) .setListener(new AnimatorListenerAdapter() { @Override public void onAnimationEnd(Animator animation) { mLoginFormView.setVisibility(show ? View.GONE : View.VISIBLE); } }); } else { // The ViewPropertyAnimator APIs are not available, so simply show // and hide the relevant UI components. mLoginStatusView.setVisibility(show ? View.VISIBLE : View.GONE); mLoginFormView.setVisibility(show ? View.GONE : View.VISIBLE); } // setTimer(); } /** * Represents an asynchronous login/registration task used to authenticate * the user. */ public class UserLoginTask extends AsyncTask<Void, Void, Boolean> { @Override protected Boolean doInBackground(Void... params) { // TODO: attempt authentication against a network service. String mResult; HttpPost mHttpPost; HttpResponse mResponse; HttpClient mHttpClient; List<NameValuePair> nameValuePairs; Boolean mDataOK = false; try { mHttpClient = new DefaultHttpClient(); mHttpPost = new HttpPost(URL); // make sure the url is correct. HttpContext httpcontext = new BasicHttpContext(); // Add your data nameValuePairs = new ArrayList<NameValuePair>(2); nameValuePairs.add(new BasicNameValuePair("usuario", mUserEditText.getText().toString().trim())); nameValuePairs .add(new BasicNameValuePair("contrasena", mPasswordEditText.getText().toString().trim())); mHttpPost.setEntity(new UrlEncodedFormEntity(nameValuePairs)); // Execute HTTP Post Request mResponse = mHttpClient.execute(mHttpPost, httpcontext); Log.e(TAG, mResponse.getAllHeaders().toString()); String responseString = EntityUtils.toString(mResponse.getEntity()); InputStream mResponseStream = new ByteArrayInputStream(responseString.getBytes(HTTP.UTF_8)); BufferedReader br = new BufferedReader(new InputStreamReader(mResponseStream)); while ((mResult = br.readLine()) != null) { mResult = mResult.replaceAll("[\r\n]", ""); if (mResult.contains( getActivity().getResources().getString(R.string.pref_videoUrl_defaultValue))) { Log.v("Response", mResult); mDataOK = true; } } } catch (IOException e) { e.printStackTrace(); mResult = null; } return mDataOK; } @Override protected void onPostExecute(Boolean dataWasOK) { if (dataWasOK) { saveCredentials(); Tool.getInstance().modBolPref(Util.SIGN_IN, true); Intent intent = new Intent(getActivity(), Activity_Main.class); intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); startActivity(intent); } else { if (!Tool.getInstance().isConnection()) { Toast.makeText(getActivity(), getResources().getString(R.string.no_connection), Toast.LENGTH_LONG).show(); } else { Toast.makeText(getActivity(), getResources().getString(R.string.user_passwd_error), Toast.LENGTH_LONG).show(); } onCancelled(); } } @Override protected void onCancelled() { mAuthTask = null; showProgress(false); } } }