Created
June 12, 2019 03:17
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| package com.besimplify.android.test.ui.login; | |
| import android.os.AsyncTask; | |
| import android.os.Bundle; | |
| import android.support.v7.app.AppCompatActivity; | |
| import android.text.Editable; | |
| import android.text.TextWatcher; | |
| import android.util.Patterns; | |
| import android.view.KeyEvent; | |
| import android.view.View; | |
| import android.view.inputmethod.EditorInfo; | |
| import android.widget.Button; | |
| import android.widget.EditText; | |
| import android.widget.ProgressBar; | |
| import android.widget.TextView; | |
| import android.widget.Toast; | |
| import com.besimplify.android.test.R; | |
| public class LoginActivity extends AppCompatActivity { | |
| class LoginTask { | |
| private final LoginApi loginApi = new LoginApi(); | |
| public void login(final String username, final String password, final Callback callback) { | |
| new AsyncTask<Void, Void, Boolean>() { | |
| @Override | |
| protected Boolean doInBackground(final Void... voids) { | |
| try { | |
| return loginApi.login(username, password); | |
| } catch (InterruptedException e) { | |
| return false; | |
| } | |
| } | |
| @Override | |
| protected void onPostExecute(final Boolean result) { | |
| super.onPostExecute(result); | |
| callback.onResult(result); | |
| } | |
| }.execute(); | |
| } | |
| } | |
| interface Callback { | |
| void onResult(boolean result); | |
| } | |
| private LoginTask loginTask = new LoginTask(); | |
| @Override | |
| public void onCreate(Bundle savedInstanceState) { | |
| super.onCreate(savedInstanceState); | |
| setContentView(R.layout.activity_login); | |
| final EditText usernameEditText = findViewById(R.id.username); | |
| final EditText passwordEditText = findViewById(R.id.password); | |
| final Button loginButton = findViewById(R.id.login); | |
| final ProgressBar loadingProgressBar = findViewById(R.id.loading); | |
| TextWatcher afterTextChangedListener = new TextWatcher() { | |
| @Override | |
| public void afterTextChanged(Editable s) { | |
| if (usernameEditText.getText() == null || passwordEditText.getText() == null) { | |
| usernameEditText.setError(getString(R.string.invalid_username)); | |
| passwordEditText.setError(getString(R.string.invalid_password)); | |
| loginButton.setEnabled(false); | |
| return; | |
| } | |
| final String username = usernameEditText.getText().toString(); | |
| if (!Patterns.EMAIL_ADDRESS.matcher(username).matches()) { | |
| usernameEditText.setError(getString(R.string.invalid_username)); | |
| loginButton.setEnabled(false); | |
| return; | |
| } | |
| final String password = passwordEditText.getText().toString(); | |
| if (password.trim().length() < 5) { | |
| passwordEditText.setError(getString(R.string.invalid_password)); | |
| loginButton.setEnabled(false); | |
| return; | |
| } | |
| usernameEditText.setError(null); | |
| passwordEditText.setError(null); | |
| loginButton.setEnabled(true); | |
| } | |
| @Override | |
| public void beforeTextChanged(CharSequence s, int start, int count, int after) { | |
| // ignore | |
| } | |
| @Override | |
| public void onTextChanged(CharSequence s, int start, int before, int count) { | |
| // ignore | |
| } | |
| }; | |
| usernameEditText.addTextChangedListener(afterTextChangedListener); | |
| passwordEditText.addTextChangedListener(afterTextChangedListener); | |
| passwordEditText.setOnEditorActionListener(new TextView.OnEditorActionListener() { | |
| @Override | |
| public boolean onEditorAction(TextView v, int actionId, KeyEvent event) { | |
| if (actionId == EditorInfo.IME_ACTION_DONE) { | |
| loadingProgressBar.setVisibility(View.VISIBLE); | |
| login(usernameEditText.getText().toString(), passwordEditText.getText().toString()); | |
| } | |
| return false; | |
| } | |
| }); | |
| loginButton.setOnClickListener(new View.OnClickListener() { | |
| @Override | |
| public void onClick(View v) { | |
| loadingProgressBar.setVisibility(View.VISIBLE); | |
| login( | |
| usernameEditText.getText().toString(), | |
| passwordEditText.getText().toString()); | |
| } | |
| }); | |
| } | |
| private void login(final String username, final String password) { | |
| loginTask.login(username, password, new Callback() { | |
| @Override | |
| public void onResult(final boolean result) { | |
| if (result) { | |
| showLoginSuccess(username); | |
| } else { | |
| showLoginFailed(); | |
| } | |
| } | |
| }); | |
| } | |
| private void showLoginFailed() { | |
| Toast.makeText(getApplicationContext(), R.string.login_failed, Toast.LENGTH_SHORT).show(); | |
| } | |
| private void showLoginSuccess(String username) { | |
| String welcome = getString(R.string.welcome) + username; | |
| Toast.makeText(getApplicationContext(), welcome, Toast.LENGTH_LONG).show(); | |
| } | |
| } | |
| class LoginApi { | |
| public boolean login(String username, String passwordd) throws InterruptedException { | |
| Thread.sleep(1_000); | |
| return username.equals("foo@gmail.com") && passwordd.equals("123456"); | |
| } | |
| } |
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