Java tutorial
/* * Copyright (C) 2011 Whisper Systems * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ package org.thoughtcrime.securesms; import android.animation.Animator; import android.app.KeyguardManager; import android.content.Context; import android.content.Intent; import android.graphics.PorterDuff; import android.os.Build; import android.os.Bundle; import android.support.v4.hardware.fingerprint.FingerprintManagerCompat; import android.support.v4.os.CancellationSignal; import android.support.v7.widget.Toolbar; import android.text.Editable; import android.text.InputType; import android.text.SpannableString; import android.text.Spanned; import android.text.style.RelativeSizeSpan; import android.text.style.TypefaceSpan; import org.thoughtcrime.securesms.logging.Log; import android.view.KeyEvent; import android.view.Menu; import android.view.MenuInflater; import android.view.MenuItem; import android.view.View; import android.view.View.OnClickListener; import android.view.WindowManager; import android.view.animation.Animation; import android.view.animation.BounceInterpolator; import android.view.animation.TranslateAnimation; import android.view.inputmethod.EditorInfo; import android.widget.EditText; import android.widget.ImageButton; import android.widget.ImageView; import android.widget.TextView; import org.thoughtcrime.securesms.animation.AnimationCompleteListener; import org.thoughtcrime.securesms.components.AnimatingToggle; import org.thoughtcrime.securesms.crypto.InvalidPassphraseException; import org.thoughtcrime.securesms.crypto.MasterSecret; import org.thoughtcrime.securesms.crypto.MasterSecretUtil; import org.thoughtcrime.securesms.util.DynamicIntroTheme; import org.thoughtcrime.securesms.util.DynamicLanguage; import org.thoughtcrime.securesms.util.TextSecurePreferences; /** * Activity that prompts for a user's passphrase. * * @author Moxie Marlinspike */ public class PassphrasePromptActivity extends PassphraseActivity { private static final String TAG = PassphrasePromptActivity.class.getSimpleName(); private DynamicIntroTheme dynamicTheme = new DynamicIntroTheme(); private DynamicLanguage dynamicLanguage = new DynamicLanguage(); private View passphraseAuthContainer; private ImageView fingerprintPrompt; private TextView lockScreenButton; private EditText passphraseText; private ImageButton showButton; private ImageButton hideButton; private AnimatingToggle visibilityToggle; private FingerprintManagerCompat fingerprintManager; private CancellationSignal fingerprintCancellationSignal; private FingerprintListener fingerprintListener; private boolean authenticated; private boolean failure; @Override public void onCreate(Bundle savedInstanceState) { Log.i(TAG, "onCreate()"); dynamicTheme.onCreate(this); dynamicLanguage.onCreate(this); getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS); getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION); super.onCreate(savedInstanceState); setContentView(R.layout.prompt_passphrase_activity); initializeResources(); } @Override public void onResume() { super.onResume(); dynamicTheme.onResume(this); dynamicLanguage.onResume(this); setLockTypeVisibility(); if (TextSecurePreferences.isScreenLockEnabled(this) && !authenticated && !failure) { resumeScreenLock(); } failure = false; } @Override public void onPause() { super.onPause(); if (TextSecurePreferences.isScreenLockEnabled(this)) { pauseScreenLock(); } } @Override protected void onNewIntent(Intent intent) { super.onNewIntent(intent); setIntent(intent); } @Override public boolean onPrepareOptionsMenu(Menu menu) { MenuInflater inflater = this.getMenuInflater(); menu.clear(); inflater.inflate(R.menu.log_submit, menu); super.onPrepareOptionsMenu(menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { super.onOptionsItemSelected(item); switch (item.getItemId()) { case R.id.menu_submit_debug_logs: handleLogSubmit(); return true; } return false; } public void onActivityResult(int requestCode, int resultcode, Intent data) { if (requestCode != 1) return; if (resultcode == RESULT_OK) { handleAuthenticated(); } else { Log.w(TAG, "Authentication failed"); failure = true; } } private void handleLogSubmit() { Intent intent = new Intent(this, LogSubmitActivity.class); startActivity(intent); } private void handlePassphrase() { try { Editable text = passphraseText.getText(); String passphrase = (text == null ? "" : text.toString()); MasterSecret masterSecret = MasterSecretUtil.getMasterSecret(this, passphrase); setMasterSecret(masterSecret); } catch (InvalidPassphraseException ipe) { passphraseText.setText(""); passphraseText.setError(getString(R.string.PassphrasePromptActivity_invalid_passphrase_exclamation)); } } private void handleAuthenticated() { try { authenticated = true; MasterSecret masterSecret = MasterSecretUtil.getMasterSecret(this, MasterSecretUtil.UNENCRYPTED_PASSPHRASE); setMasterSecret(masterSecret); } catch (InvalidPassphraseException e) { throw new AssertionError(e); } } private void setPassphraseVisibility(boolean visibility) { int cursorPosition = passphraseText.getSelectionStart(); if (visibility) { passphraseText.setInputType(InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD); } else { passphraseText.setInputType(InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_PASSWORD); } passphraseText.setSelection(cursorPosition); } private void initializeResources() { ImageButton okButton = findViewById(R.id.ok_button); Toolbar toolbar = findViewById(R.id.toolbar); showButton = findViewById(R.id.passphrase_visibility); hideButton = findViewById(R.id.passphrase_visibility_off); visibilityToggle = findViewById(R.id.button_toggle); passphraseText = findViewById(R.id.passphrase_edit); passphraseAuthContainer = findViewById(R.id.password_auth_container); fingerprintPrompt = findViewById(R.id.fingerprint_auth_container); lockScreenButton = findViewById(R.id.lock_screen_auth_container); fingerprintManager = FingerprintManagerCompat.from(this); fingerprintCancellationSignal = new CancellationSignal(); fingerprintListener = new FingerprintListener(); setSupportActionBar(toolbar); getSupportActionBar().setTitle(""); SpannableString hint = new SpannableString( " " + getString(R.string.PassphrasePromptActivity_enter_passphrase)); hint.setSpan(new RelativeSizeSpan(0.9f), 0, hint.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE); hint.setSpan(new TypefaceSpan("sans-serif"), 0, hint.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE); passphraseText.setHint(hint); okButton.setOnClickListener(new OkButtonClickListener()); showButton.setOnClickListener(new ShowButtonOnClickListener()); hideButton.setOnClickListener(new HideButtonOnClickListener()); passphraseText.setOnEditorActionListener(new PassphraseActionListener()); passphraseText.setImeActionLabel(getString(R.string.prompt_passphrase_activity__unlock), EditorInfo.IME_ACTION_DONE); fingerprintPrompt.setImageResource(R.drawable.ic_fingerprint_white_48dp); fingerprintPrompt.getBackground().setColorFilter(getResources().getColor(R.color.signal_primary), PorterDuff.Mode.SRC_IN); lockScreenButton.setOnClickListener(v -> resumeScreenLock()); } private void setLockTypeVisibility() { if (TextSecurePreferences.isScreenLockEnabled(this)) { passphraseAuthContainer.setVisibility(View.GONE); if (fingerprintManager.isHardwareDetected() && fingerprintManager.hasEnrolledFingerprints()) { fingerprintPrompt.setVisibility(View.VISIBLE); lockScreenButton.setVisibility(View.GONE); } else { fingerprintPrompt.setVisibility(View.GONE); lockScreenButton.setVisibility(View.VISIBLE); } } else { passphraseAuthContainer.setVisibility(View.VISIBLE); fingerprintPrompt.setVisibility(View.GONE); lockScreenButton.setVisibility(View.GONE); } } private void resumeScreenLock() { KeyguardManager keyguardManager = (KeyguardManager) getSystemService(Context.KEYGUARD_SERVICE); assert keyguardManager != null; if (!keyguardManager.isKeyguardSecure()) { Log.w(TAG, "Keyguard not secure..."); handleAuthenticated(); return; } if (fingerprintManager.isHardwareDetected() && fingerprintManager.hasEnrolledFingerprints()) { Log.i(TAG, "Listening for fingerprints..."); fingerprintCancellationSignal = new CancellationSignal(); fingerprintManager.authenticate(null, 0, fingerprintCancellationSignal, fingerprintListener, null); } else if (Build.VERSION.SDK_INT >= 21) { Log.i(TAG, "firing intent..."); Intent intent = keyguardManager.createConfirmDeviceCredentialIntent("Unlock Signal", ""); startActivityForResult(intent, 1); } else { Log.w(TAG, "Not compatible..."); handleAuthenticated(); } } private void pauseScreenLock() { if (fingerprintCancellationSignal != null) { fingerprintCancellationSignal.cancel(); } } private class PassphraseActionListener implements TextView.OnEditorActionListener { @Override public boolean onEditorAction(TextView exampleView, int actionId, KeyEvent keyEvent) { if ((keyEvent == null && actionId == EditorInfo.IME_ACTION_DONE) || (keyEvent != null && keyEvent.getAction() == KeyEvent.ACTION_DOWN && (actionId == EditorInfo.IME_NULL))) { handlePassphrase(); return true; } else if (keyEvent != null && keyEvent.getAction() == KeyEvent.ACTION_UP && actionId == EditorInfo.IME_NULL) { return true; } return false; } } private class OkButtonClickListener implements OnClickListener { @Override public void onClick(View v) { handlePassphrase(); } } private class ShowButtonOnClickListener implements OnClickListener { @Override public void onClick(View v) { visibilityToggle.display(hideButton); setPassphraseVisibility(true); } } private class HideButtonOnClickListener implements OnClickListener { @Override public void onClick(View v) { visibilityToggle.display(showButton); setPassphraseVisibility(false); } } @Override protected void cleanup() { this.passphraseText.setText(""); System.gc(); } private class FingerprintListener extends FingerprintManagerCompat.AuthenticationCallback { @Override public void onAuthenticationError(int errMsgId, CharSequence errString) { Log.w(TAG, "Authentication error: " + errMsgId + " " + errString); onAuthenticationFailed(); } @Override public void onAuthenticationSucceeded(FingerprintManagerCompat.AuthenticationResult result) { Log.i(TAG, "onAuthenticationSucceeded"); fingerprintPrompt.setImageResource(R.drawable.ic_check_white_48dp); fingerprintPrompt.getBackground().setColorFilter(getResources().getColor(R.color.green_500), PorterDuff.Mode.SRC_IN); fingerprintPrompt.animate().setInterpolator(new BounceInterpolator()).scaleX(1.1f).scaleY(1.1f) .setDuration(500).setListener(new AnimationCompleteListener() { @Override public void onAnimationEnd(Animator animation) { handleAuthenticated(); fingerprintPrompt.setImageResource(R.drawable.ic_fingerprint_white_48dp); fingerprintPrompt.getBackground().setColorFilter( getResources().getColor(R.color.signal_primary), PorterDuff.Mode.SRC_IN); } }).start(); } @Override public void onAuthenticationFailed() { Log.w(TAG, "onAuthenticatoinFailed()"); FingerprintManagerCompat.AuthenticationCallback callback = this; fingerprintPrompt.setImageResource(R.drawable.ic_close_white_48dp); fingerprintPrompt.getBackground().setColorFilter(getResources().getColor(R.color.red_500), PorterDuff.Mode.SRC_IN); TranslateAnimation shake = new TranslateAnimation(0, 30, 0, 0); shake.setDuration(50); shake.setRepeatCount(7); shake.setAnimationListener(new Animation.AnimationListener() { @Override public void onAnimationStart(Animation animation) { } @Override public void onAnimationEnd(Animation animation) { fingerprintPrompt.setImageResource(R.drawable.ic_fingerprint_white_48dp); fingerprintPrompt.getBackground().setColorFilter( getResources().getColor(R.color.signal_primary), PorterDuff.Mode.SRC_IN); } @Override public void onAnimationRepeat(Animation animation) { } }); fingerprintPrompt.startAnimation(shake); } } }