| /* |
| * Copyright (C) 2008 The Android Open Source Project |
| * |
| * 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 com.android.phone; |
| |
| import static android.telephony.ServiceState.RIL_RADIO_TECHNOLOGY_UNKNOWN; |
| |
| import android.animation.Animator; |
| import android.animation.AnimatorListenerAdapter; |
| import android.annotation.ColorInt; |
| import android.app.Activity; |
| import android.app.AlertDialog; |
| import android.app.Dialog; |
| import android.app.WallpaperColors; |
| import android.app.WallpaperManager; |
| import android.content.BroadcastReceiver; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.IntentFilter; |
| import android.database.DataSetObserver; |
| import android.graphics.Color; |
| import android.graphics.Point; |
| import android.graphics.drawable.ColorDrawable; |
| import android.media.AudioManager; |
| import android.media.ToneGenerator; |
| import android.net.Uri; |
| import android.os.AsyncTask; |
| import android.os.Bundle; |
| import android.os.PersistableBundle; |
| import android.provider.Settings; |
| import android.telecom.PhoneAccount; |
| import android.telecom.TelecomManager; |
| import android.telephony.CarrierConfigManager; |
| import android.telephony.PhoneNumberUtils; |
| import android.telephony.ServiceState; |
| import android.telephony.SubscriptionManager; |
| import android.telephony.TelephonyManager; |
| import android.text.Editable; |
| import android.text.InputType; |
| import android.text.Spannable; |
| import android.text.SpannableString; |
| import android.text.TextUtils; |
| import android.text.TextWatcher; |
| import android.text.method.DialerKeyListener; |
| import android.text.style.TtsSpan; |
| import android.util.Log; |
| import android.util.TypedValue; |
| import android.view.HapticFeedbackConstants; |
| import android.view.KeyEvent; |
| import android.view.MenuItem; |
| import android.view.MotionEvent; |
| import android.view.View; |
| import android.view.View.AccessibilityDelegate; |
| import android.view.ViewGroup; |
| import android.view.WindowManager; |
| import android.view.accessibility.AccessibilityEvent; |
| import android.widget.TextView; |
| |
| import com.android.phone.common.dialpad.DialpadKeyButton; |
| import com.android.phone.common.util.ViewUtil; |
| import com.android.phone.common.widget.ResizingTextEditText; |
| import com.android.telephony.Rlog; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.Locale; |
| |
| /** |
| * EmergencyDialer is a special dialer that is used ONLY for dialing emergency calls. |
| * |
| * It's a simplified version of the regular dialer (i.e. the TwelveKeyDialer |
| * activity from apps/Contacts) that: |
| * 1. Allows ONLY emergency calls to be dialed |
| * 2. Disallows voicemail functionality |
| * 3. Allows this activity to stay in front of the keyguard. |
| * |
| * TODO: Even though this is an ultra-simplified version of the normal |
| * dialer, there's still lots of code duplication between this class and |
| * the TwelveKeyDialer class from apps/Contacts. Could the common code be |
| * moved into a shared base class that would live in the framework? |
| * Or could we figure out some way to move *this* class into apps/Contacts |
| * also? |
| */ |
| public class EmergencyDialer extends Activity implements View.OnClickListener, |
| View.OnLongClickListener, View.OnKeyListener, TextWatcher, |
| DialpadKeyButton.OnPressedListener, |
| WallpaperManager.OnColorsChangedListener, |
| EmergencyShortcutButton.OnConfirmClickListener, |
| EmergencyInfoGroup.OnConfirmClickListener { |
| |
| // Keys used with onSaveInstanceState(). |
| private static final String LAST_NUMBER = "lastNumber"; |
| |
| // Intent action for this activity. |
| public static final String ACTION_DIAL = "com.android.phone.EmergencyDialer.DIAL"; |
| |
| /** |
| * Extra included in {@link #ACTION_DIAL} to indicate the entry type that user starts |
| * the emergency dialer. |
| */ |
| public static final String EXTRA_ENTRY_TYPE = |
| "com.android.phone.EmergencyDialer.extra.ENTRY_TYPE"; |
| |
| // Constants indicating the entry type that user opened emergency dialer. |
| // This info is sent from system UI with EXTRA_ENTRY_TYPE. Please make them being |
| // in sync with those in com.android.systemui.util.EmergencyDialerConstants. |
| public static final int ENTRY_TYPE_UNKNOWN = 0; |
| public static final int ENTRY_TYPE_LOCKSCREEN_BUTTON = 1; |
| public static final int ENTRY_TYPE_POWER_MENU = 2; |
| |
| // List of dialer button IDs. |
| private static final int[] DIALER_KEYS = new int[]{ |
| R.id.one, R.id.two, R.id.three, |
| R.id.four, R.id.five, R.id.six, |
| R.id.seven, R.id.eight, R.id.nine, |
| R.id.star, R.id.zero, R.id.pound}; |
| |
| // Debug constants. |
| private static final boolean DBG = false; |
| private static final String LOG_TAG = "EmergencyDialer"; |
| |
| /** The length of DTMF tones in milliseconds */ |
| private static final int TONE_LENGTH_MS = 150; |
| |
| /** The DTMF tone volume relative to other sounds in the stream */ |
| private static final int TONE_RELATIVE_VOLUME = 80; |
| |
| /** Stream type used to play the DTMF tones off call, and mapped to the volume control keys */ |
| private static final int DIAL_TONE_STREAM_TYPE = AudioManager.STREAM_DTMF; |
| |
| private static final int BAD_EMERGENCY_NUMBER_DIALOG = 0; |
| |
| /** 90% opacity, different from other gradients **/ |
| private static final int BACKGROUND_GRADIENT_ALPHA = 230; |
| |
| /** 85% opacity for black background **/ |
| private static final int BLACK_BACKGROUND_GRADIENT_ALPHA = 217; |
| |
| /** Size limit of emergency shortcut buttons container. **/ |
| private static final int SHORTCUT_SIZE_LIMIT = 3; |
| |
| private static final float COLOR_DELTA = 1.0f / 16.0f; |
| |
| /** Dial button color, from packages/apps/PhoneCommon/res/drawable-mdpi/fab_green.png **/ |
| @ColorInt private static final int DIALER_GREEN = 0xff00c853; |
| |
| ResizingTextEditText mDigits; |
| private View mDialButton; |
| private View mDelete; |
| private View mEmergencyShortcutView; |
| private View mDialpadView; |
| |
| private List<EmergencyShortcutButton> mEmergencyShortcutButtonList; |
| private EccShortcutAdapter mShortcutAdapter; |
| private DataSetObserver mShortcutDataSetObserver = null; |
| |
| private ToneGenerator mToneGenerator; |
| private Object mToneGeneratorLock = new Object(); |
| |
| // determines if we want to playback local DTMF tones. |
| private boolean mDTMFToneEnabled; |
| |
| private EmergencyInfoGroup mEmergencyInfoInDialpad; |
| private EmergencyInfoGroup mEmergencyInfoInShortcut; |
| |
| // close activity when screen turns off |
| private BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() { |
| @Override |
| public void onReceive(Context context, Intent intent) { |
| if (Intent.ACTION_SCREEN_OFF.equals(intent.getAction())) { |
| finishAndRemoveTask(); |
| } |
| } |
| }; |
| |
| /** |
| * Customize accessibility methods in View. |
| */ |
| private AccessibilityDelegate mAccessibilityDelegate = new AccessibilityDelegate() { |
| |
| /** |
| * Stop AccessiblityService from reading the title of a hidden View. |
| * |
| * <p>The crossfade animation will set the visibility of fade out view to {@link View.GONE} |
| * in the animation end. The view with an accessibility pane title would call the |
| * {@link AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED} event, which would trigger the |
| * accessibility service to read the pane title of fade out view instead of pane title of |
| * fade in view. So it need to filter out the event called by vanished pane. |
| */ |
| @Override |
| public void onPopulateAccessibilityEvent(View host, AccessibilityEvent event) { |
| if (event.getEventType() == AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED |
| && host.getVisibility() == View.GONE) { |
| return; |
| } |
| super.onPopulateAccessibilityEvent(host, event); |
| } |
| }; |
| |
| private String mLastNumber; // last number we tried to dial. Used to restore error dialog. |
| |
| // Background gradient |
| private ColorDrawable mBackgroundDrawable; |
| private boolean mSupportsDarkText; |
| |
| private boolean mIsWfcEmergencyCallingWarningEnabled; |
| private float mDefaultDigitsTextSize; |
| |
| private int mEntryType; |
| private ShortcutViewUtils.Config mShortcutViewConfig; |
| |
| @Override |
| public void beforeTextChanged(CharSequence s, int start, int count, int after) { |
| // Do nothing |
| } |
| |
| @Override |
| public void onTextChanged(CharSequence input, int start, int before, int changeCount) { |
| maybeChangeHintSize(); |
| } |
| |
| @Override |
| public void afterTextChanged(Editable input) { |
| // Check for special sequences, in particular the "**04" or "**05" |
| // sequences that allow you to enter PIN or PUK-related codes. |
| // |
| // But note we *don't* allow most other special sequences here, |
| // like "secret codes" (*#*#<code>#*#*) or IMEI display ("*#06#"), |
| // since those shouldn't be available if the device is locked. |
| // |
| // So we call SpecialCharSequenceMgr.handleCharsForLockedDevice() |
| // here, not the regular handleChars() method. |
| if (SpecialCharSequenceMgr.handleCharsForLockedDevice(this, input.toString(), this)) { |
| // A special sequence was entered, clear the digits |
| mDigits.getText().clear(); |
| } |
| |
| updateDialAndDeleteButtonStateEnabledAttr(); |
| updateTtsSpans(); |
| } |
| |
| @Override |
| protected void onCreate(Bundle icicle) { |
| super.onCreate(icicle); |
| |
| mEntryType = getIntent().getIntExtra(EXTRA_ENTRY_TYPE, ENTRY_TYPE_UNKNOWN); |
| Log.d(LOG_TAG, "Launched from " + entryTypeToString(mEntryType)); |
| |
| // Allow turning screen on |
| setTurnScreenOn(true); |
| |
| CarrierConfigManager configMgr = getSystemService(CarrierConfigManager.class); |
| PersistableBundle carrierConfig = |
| configMgr.getConfigForSubId(SubscriptionManager.getDefaultVoiceSubscriptionId()); |
| |
| mShortcutViewConfig = new ShortcutViewUtils.Config(this, carrierConfig, mEntryType); |
| Log.d(LOG_TAG, "Enable emergency dialer shortcut: " |
| + mShortcutViewConfig.isEnabled()); |
| |
| if (mShortcutViewConfig.isEnabled()) { |
| // Shortcut view doesn't support dark text theme. |
| updateTheme(false); |
| } else { |
| WallpaperColors wallpaperColors = |
| getWallpaperManager().getWallpaperColors(WallpaperManager.FLAG_LOCK); |
| updateTheme(supportsDarkText(wallpaperColors)); |
| } |
| |
| setContentView(R.layout.emergency_dialer); |
| |
| mDigits = (ResizingTextEditText) findViewById(R.id.digits); |
| mDigits.setKeyListener(DialerKeyListener.getInstance()); |
| mDigits.setOnClickListener(this); |
| mDigits.setOnKeyListener(this); |
| mDigits.setLongClickable(false); |
| mDigits.setInputType(InputType.TYPE_NULL); |
| mDefaultDigitsTextSize = mDigits.getScaledTextSize(); |
| maybeAddNumberFormatting(); |
| |
| mBackgroundDrawable = new ColorDrawable(); |
| Point displaySize = new Point(); |
| ((WindowManager) getSystemService(Context.WINDOW_SERVICE)) |
| .getDefaultDisplay().getSize(displaySize); |
| mBackgroundDrawable.setAlpha(mShortcutViewConfig.isEnabled() |
| ? BLACK_BACKGROUND_GRADIENT_ALPHA : BACKGROUND_GRADIENT_ALPHA); |
| getWindow().setBackgroundDrawable(mBackgroundDrawable); |
| |
| // Check for the presence of the keypad |
| View view = findViewById(R.id.one); |
| if (view != null) { |
| setupKeypad(); |
| } |
| |
| mDelete = findViewById(R.id.deleteButton); |
| mDelete.setOnClickListener(this); |
| mDelete.setOnLongClickListener(this); |
| |
| mDialButton = findViewById(R.id.floating_action_button); |
| |
| // Check whether we should show the onscreen "Dial" button and co. |
| // Read carrier config through the public API because PhoneGlobals is not available when we |
| // run as a secondary user. |
| if (carrierConfig.getBoolean(CarrierConfigManager.KEY_SHOW_ONSCREEN_DIAL_BUTTON_BOOL)) { |
| mDialButton.setOnClickListener(this); |
| } else { |
| mDialButton.setVisibility(View.GONE); |
| } |
| mIsWfcEmergencyCallingWarningEnabled = carrierConfig.getInt( |
| CarrierConfigManager.KEY_EMERGENCY_NOTIFICATION_DELAY_INT) > -1; |
| maybeShowWfcEmergencyCallingWarning(); |
| |
| ViewUtil.setupFloatingActionButton(mDialButton, getResources()); |
| |
| if (icicle != null) { |
| super.onRestoreInstanceState(icicle); |
| } |
| |
| // Extract phone number from intent |
| Uri data = getIntent().getData(); |
| if (data != null && (PhoneAccount.SCHEME_TEL.equals(data.getScheme()))) { |
| String number = PhoneNumberUtils.getNumberFromIntent(getIntent(), this); |
| if (number != null) { |
| mDigits.setText(number); |
| } |
| } |
| |
| // if the mToneGenerator creation fails, just continue without it. It is |
| // a local audio signal, and is not as important as the dtmf tone itself. |
| synchronized (mToneGeneratorLock) { |
| if (mToneGenerator == null) { |
| try { |
| mToneGenerator = new ToneGenerator(DIAL_TONE_STREAM_TYPE, TONE_RELATIVE_VOLUME); |
| } catch (RuntimeException e) { |
| Log.w(LOG_TAG, "Exception caught while creating local tone generator: " + e); |
| mToneGenerator = null; |
| } |
| } |
| } |
| |
| final IntentFilter intentFilter = new IntentFilter(); |
| intentFilter.addAction(Intent.ACTION_SCREEN_OFF); |
| registerReceiver(mBroadcastReceiver, intentFilter); |
| |
| mEmergencyInfoInDialpad = findViewById(R.id.emergency_dialer) |
| .findViewById(R.id.emergency_info_button); |
| |
| mEmergencyInfoInShortcut = findViewById(R.id.emergency_dialer_shortcuts) |
| .findViewById(R.id.emergency_info_button); |
| |
| setupEmergencyDialpadViews(); |
| |
| if (mShortcutViewConfig.isEnabled()) { |
| setupEmergencyShortcutsView(); |
| } |
| } |
| |
| @Override |
| protected void onDestroy() { |
| super.onDestroy(); |
| synchronized (mToneGeneratorLock) { |
| if (mToneGenerator != null) { |
| mToneGenerator.release(); |
| mToneGenerator = null; |
| } |
| } |
| unregisterReceiver(mBroadcastReceiver); |
| if (mShortcutAdapter != null && mShortcutDataSetObserver != null) { |
| mShortcutAdapter.unregisterDataSetObserver(mShortcutDataSetObserver); |
| mShortcutDataSetObserver = null; |
| } |
| } |
| |
| @Override |
| protected void onRestoreInstanceState(Bundle icicle) { |
| mLastNumber = icicle.getString(LAST_NUMBER); |
| } |
| |
| @Override |
| protected void onSaveInstanceState(Bundle outState) { |
| super.onSaveInstanceState(outState); |
| outState.putString(LAST_NUMBER, mLastNumber); |
| } |
| |
| /** |
| * Explicitly turn off number formatting, since it gets in the way of the emergency |
| * number detector |
| */ |
| protected void maybeAddNumberFormatting() { |
| // Do nothing. |
| } |
| |
| @Override |
| protected void onPostCreate(Bundle savedInstanceState) { |
| super.onPostCreate(savedInstanceState); |
| |
| // This can't be done in onCreate(), since the auto-restoring of the digits |
| // will play DTMF tones for all the old digits if it is when onRestoreSavedInstanceState() |
| // is called. This method will be called every time the activity is created, and |
| // will always happen after onRestoreSavedInstanceState(). |
| mDigits.addTextChangedListener(this); |
| } |
| |
| private void setupKeypad() { |
| // Setup the listeners for the buttons |
| for (int id : DIALER_KEYS) { |
| final DialpadKeyButton key = (DialpadKeyButton) findViewById(id); |
| key.setOnPressedListener(this); |
| } |
| |
| View view = findViewById(R.id.zero); |
| view.setOnLongClickListener(this); |
| } |
| |
| @Override |
| public void onBackPressed() { |
| // If shortcut view is enabled and Dialpad view is visible, pressing the back key will |
| // back to display EmergencyShortcutView view. Otherwise, it would finish the activity. |
| if (mShortcutViewConfig.isEnabled() && mDialpadView != null |
| && mDialpadView.getVisibility() == View.VISIBLE) { |
| switchView(mEmergencyShortcutView, mDialpadView, true); |
| return; |
| } |
| super.onBackPressed(); |
| } |
| |
| /** |
| * handle key events |
| */ |
| @Override |
| public boolean onKeyDown(int keyCode, KeyEvent event) { |
| switch (keyCode) { |
| // Happen when there's a "Call" hard button. |
| case KeyEvent.KEYCODE_CALL: { |
| if (TextUtils.isEmpty(mDigits.getText().toString())) { |
| // if we are adding a call from the InCallScreen and the phone |
| // number entered is empty, we just close the dialer to expose |
| // the InCallScreen under it. |
| finish(); |
| } else { |
| // otherwise, we place the call. |
| placeCall(); |
| } |
| return true; |
| } |
| } |
| return super.onKeyDown(keyCode, event); |
| } |
| |
| private void keyPressed(int keyCode) { |
| mDigits.performHapticFeedback(HapticFeedbackConstants.VIRTUAL_KEY); |
| KeyEvent event = new KeyEvent(KeyEvent.ACTION_DOWN, keyCode); |
| mDigits.onKeyDown(keyCode, event); |
| } |
| |
| @Override |
| public boolean onKey(View view, int keyCode, KeyEvent event) { |
| if (view.getId() |
| == R.id.digits) { // Happen when "Done" button of the IME is pressed. This can |
| // happen when this |
| // Activity is forced into landscape mode due to a desk dock. |
| if (keyCode == KeyEvent.KEYCODE_ENTER |
| && event.getAction() == KeyEvent.ACTION_UP) { |
| placeCall(); |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| @Override |
| public boolean dispatchTouchEvent(MotionEvent ev) { |
| onPreTouchEvent(ev); |
| boolean handled = super.dispatchTouchEvent(ev); |
| onPostTouchEvent(ev); |
| return handled; |
| } |
| |
| @Override |
| public void onConfirmClick(EmergencyShortcutButton button) { |
| if (button == null) return; |
| String phoneNumber = button.getPhoneNumber(); |
| |
| if (!TextUtils.isEmpty(phoneNumber)) { |
| if (DBG) Log.d(LOG_TAG, "dial emergency number: " + Rlog.pii(LOG_TAG, phoneNumber)); |
| |
| placeCall(phoneNumber, TelecomManager.CALL_SOURCE_EMERGENCY_SHORTCUT, |
| mShortcutViewConfig.getPhoneInfo()); |
| } else { |
| Log.d(LOG_TAG, "emergency number is empty"); |
| } |
| } |
| |
| @Override |
| public void onConfirmClick(EmergencyInfoGroup button) { |
| if (button == null) return; |
| |
| Intent intent = (Intent) button.getTag(R.id.tag_intent); |
| if (intent != null) { |
| startActivity(intent); |
| } |
| } |
| |
| @Override |
| public void onClick(View view) { |
| if (view.getId() == R.id.deleteButton) { |
| keyPressed(KeyEvent.KEYCODE_DEL); |
| return; |
| } else if (view.getId() == R.id.floating_action_button) { |
| view.performHapticFeedback(HapticFeedbackConstants.VIRTUAL_KEY); |
| placeCall(); |
| return; |
| } else if (view.getId() == R.id.digits) { |
| if (mDigits.length() != 0) { |
| mDigits.setCursorVisible(true); |
| } |
| return; |
| } else if (view.getId() == R.id.floating_action_button_dialpad) { |
| mDigits.getText().clear(); |
| switchView(mDialpadView, mEmergencyShortcutView, true); |
| return; |
| } |
| } |
| |
| @Override |
| public void onPressed(View view, boolean pressed) { |
| if (!pressed) { |
| return; |
| } |
| if (view.getId() == R.id.one) { |
| playTone(ToneGenerator.TONE_DTMF_1); |
| keyPressed(KeyEvent.KEYCODE_1); |
| return; |
| } else if (view.getId() == R.id.two) { |
| playTone(ToneGenerator.TONE_DTMF_2); |
| keyPressed(KeyEvent.KEYCODE_2); |
| return; |
| } else if (view.getId() == R.id.three) { |
| playTone(ToneGenerator.TONE_DTMF_3); |
| keyPressed(KeyEvent.KEYCODE_3); |
| return; |
| } else if (view.getId() == R.id.four) { |
| playTone(ToneGenerator.TONE_DTMF_4); |
| keyPressed(KeyEvent.KEYCODE_4); |
| return; |
| } else if (view.getId() == R.id.five) { |
| playTone(ToneGenerator.TONE_DTMF_5); |
| keyPressed(KeyEvent.KEYCODE_5); |
| return; |
| } else if (view.getId() == R.id.six) { |
| playTone(ToneGenerator.TONE_DTMF_6); |
| keyPressed(KeyEvent.KEYCODE_6); |
| return; |
| } else if (view.getId() == R.id.seven) { |
| playTone(ToneGenerator.TONE_DTMF_7); |
| keyPressed(KeyEvent.KEYCODE_7); |
| return; |
| } else if (view.getId() == R.id.eight) { |
| playTone(ToneGenerator.TONE_DTMF_8); |
| keyPressed(KeyEvent.KEYCODE_8); |
| return; |
| } else if (view.getId() == R.id.nine) { |
| playTone(ToneGenerator.TONE_DTMF_9); |
| keyPressed(KeyEvent.KEYCODE_9); |
| return; |
| } else if (view.getId() == R.id.zero) { |
| playTone(ToneGenerator.TONE_DTMF_0); |
| keyPressed(KeyEvent.KEYCODE_0); |
| return; |
| } else if (view.getId() == R.id.pound) { |
| playTone(ToneGenerator.TONE_DTMF_P); |
| keyPressed(KeyEvent.KEYCODE_POUND); |
| return; |
| } else if (view.getId() == R.id.star) { |
| playTone(ToneGenerator.TONE_DTMF_S); |
| keyPressed(KeyEvent.KEYCODE_STAR); |
| return; |
| } |
| } |
| |
| /** |
| * called for long touch events |
| */ |
| @Override |
| public boolean onLongClick(View view) { |
| int id = view.getId(); |
| if (id == R.id.deleteButton) { |
| mDigits.getText().clear(); |
| return true; |
| } else if (id == R.id.zero) { |
| removePreviousDigitIfPossible(); |
| keyPressed(KeyEvent.KEYCODE_PLUS); |
| return true; |
| } |
| return false; |
| } |
| |
| @Override |
| protected void onStart() { |
| super.onStart(); |
| |
| if (mShortcutViewConfig.isEnabled()) { |
| // Shortcut view doesn't support dark text theme. |
| mBackgroundDrawable.setColor(Color.BLACK); |
| updateTheme(false); |
| } else { |
| WallpaperManager wallpaperManager = getWallpaperManager(); |
| if (wallpaperManager.isWallpaperSupported()) { |
| wallpaperManager.addOnColorsChangedListener(this, null); |
| } |
| |
| WallpaperColors wallpaperColors = |
| wallpaperManager.getWallpaperColors(WallpaperManager.FLAG_LOCK); |
| mBackgroundDrawable.setColor(getPrimaryColor(wallpaperColors)); |
| updateTheme(supportsDarkText(wallpaperColors)); |
| } |
| |
| if (mShortcutViewConfig.isEnabled()) { |
| updateLocationAndEccInfo(); |
| } |
| } |
| |
| @Override |
| protected void onResume() { |
| super.onResume(); |
| |
| // retrieve the DTMF tone play back setting. |
| mDTMFToneEnabled = Settings.System.getInt(getContentResolver(), |
| Settings.System.DTMF_TONE_WHEN_DIALING, 1) == 1; |
| |
| // if the mToneGenerator creation fails, just continue without it. It is |
| // a local audio signal, and is not as important as the dtmf tone itself. |
| synchronized (mToneGeneratorLock) { |
| if (mToneGenerator == null) { |
| try { |
| mToneGenerator = new ToneGenerator(AudioManager.STREAM_DTMF, |
| TONE_RELATIVE_VOLUME); |
| } catch (RuntimeException e) { |
| Log.w(LOG_TAG, "Exception caught while creating local tone generator: " + e); |
| mToneGenerator = null; |
| } |
| } |
| } |
| |
| updateDialAndDeleteButtonStateEnabledAttr(); |
| } |
| |
| @Override |
| public void onPause() { |
| super.onPause(); |
| } |
| |
| @Override |
| protected void onStop() { |
| super.onStop(); |
| |
| WallpaperManager wallpaperManager = getWallpaperManager(); |
| if (wallpaperManager.isWallpaperSupported()) { |
| wallpaperManager.removeOnColorsChangedListener(this); |
| } |
| } |
| |
| /** |
| * Sets theme based on gradient colors |
| * |
| * @param supportsDarkText true if gradient supports dark text |
| */ |
| private void updateTheme(boolean supportsDarkText) { |
| if (mSupportsDarkText == supportsDarkText) { |
| return; |
| } |
| mSupportsDarkText = supportsDarkText; |
| |
| // We can't change themes after inflation, in this case we'll have to recreate |
| // the whole activity. |
| if (mBackgroundDrawable != null) { |
| recreate(); |
| return; |
| } |
| |
| int vis = getWindow().getDecorView().getSystemUiVisibility(); |
| if (supportsDarkText) { |
| vis |= View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR; |
| vis |= View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR; |
| setTheme(R.style.EmergencyDialerThemeDark); |
| } else { |
| vis &= View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR; |
| vis &= View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR; |
| setTheme(R.style.EmergencyDialerTheme); |
| } |
| getWindow().getDecorView().setSystemUiVisibility(vis); |
| } |
| |
| /** |
| * place the call, but check to make sure it is a viable number. |
| */ |
| private void placeCall() { |
| mLastNumber = mDigits.getText().toString(); |
| |
| // Convert into emergency number according to emergency conversion map. |
| // If conversion map is not defined (this is default), this method does |
| // nothing and just returns input number. |
| mLastNumber = PhoneNumberUtils.convertToEmergencyNumber(this, mLastNumber); |
| |
| boolean isEmergencyNumber; |
| ShortcutViewUtils.PhoneInfo phoneToMakeCall = null; |
| if (mShortcutAdapter != null && mShortcutAdapter.hasShortcut(mLastNumber)) { |
| isEmergencyNumber = true; |
| phoneToMakeCall = mShortcutViewConfig.getPhoneInfo(); |
| } else if (mShortcutViewConfig.hasPromotedEmergencyNumber(mLastNumber)) { |
| // If a number from SIM/network/... is categoried as police/ambulance/fire, |
| // hasPromotedEmergencyNumber() will return true, but it maybe not promoted as a |
| // shortcut button because a number provided by database has higher priority. |
| isEmergencyNumber = true; |
| phoneToMakeCall = mShortcutViewConfig.getPhoneInfo(); |
| } else { |
| try { |
| isEmergencyNumber = getSystemService(TelephonyManager.class) |
| .isEmergencyNumber(mLastNumber); |
| } catch (IllegalStateException ise) { |
| isEmergencyNumber = false; |
| } |
| } |
| |
| if (isEmergencyNumber) { |
| if (DBG) Log.d(LOG_TAG, "placing call to " + mLastNumber); |
| |
| // place the call if it is a valid number |
| if (mLastNumber == null || !TextUtils.isGraphic(mLastNumber)) { |
| // There is no number entered. |
| playTone(ToneGenerator.TONE_PROP_NACK); |
| return; |
| } |
| |
| placeCall(mLastNumber, TelecomManager.CALL_SOURCE_EMERGENCY_DIALPAD, |
| phoneToMakeCall); |
| } else { |
| if (DBG) Log.d(LOG_TAG, "rejecting bad requested number " + mLastNumber); |
| |
| showDialog(BAD_EMERGENCY_NUMBER_DIALOG); |
| } |
| mDigits.getText().delete(0, mDigits.getText().length()); |
| } |
| |
| private void placeCall(String number, int callSource, ShortcutViewUtils.PhoneInfo phone) { |
| Log.d(LOG_TAG, "Place emergency call from " + callSourceToString(callSource) |
| + ", entry = " + entryTypeToString(mEntryType)); |
| |
| Bundle extras = new Bundle(); |
| extras.putInt(TelecomManager.EXTRA_CALL_SOURCE, callSource); |
| /** |
| * This is used for Telecom and Telephony to tell modem user's intent is emergency call, |
| * when the dialed number is ambiguous and identified as both emergency number and any |
| * other non-emergency number; e.g. in some situation, 611 could be both an emergency |
| * number in a country and a non-emergency number of a carrier's customer service hotline. |
| */ |
| extras.putBoolean(TelecomManager.EXTRA_IS_USER_INTENT_EMERGENCY_CALL, true); |
| |
| if (phone != null && phone.getPhoneAccountHandle() != null) { |
| // Requests to dial through the specified phone. |
| extras.putParcelable(TelecomManager.EXTRA_PHONE_ACCOUNT_HANDLE, |
| phone.getPhoneAccountHandle()); |
| } |
| |
| TelecomManager tm = this.getSystemService(TelecomManager.class); |
| tm.placeCall(Uri.fromParts(PhoneAccount.SCHEME_TEL, number, null), extras); |
| } |
| |
| /** |
| * Plays the specified tone for TONE_LENGTH_MS milliseconds. |
| * |
| * The tone is played locally, using the audio stream for phone calls. |
| * Tones are played only if the "Audible touch tones" user preference |
| * is checked, and are NOT played if the device is in silent mode. |
| * |
| * @param tone a tone code from {@link ToneGenerator} |
| */ |
| void playTone(int tone) { |
| // if local tone playback is disabled, just return. |
| if (!mDTMFToneEnabled) { |
| return; |
| } |
| |
| // Also do nothing if the phone is in silent mode. |
| // We need to re-check the ringer mode for *every* playTone() |
| // call, rather than keeping a local flag that's updated in |
| // onResume(), since it's possible to toggle silent mode without |
| // leaving the current activity (via the ENDCALL-longpress menu.) |
| AudioManager audioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE); |
| int ringerMode = audioManager.getRingerMode(); |
| if ((ringerMode == AudioManager.RINGER_MODE_SILENT) |
| || (ringerMode == AudioManager.RINGER_MODE_VIBRATE)) { |
| return; |
| } |
| |
| synchronized (mToneGeneratorLock) { |
| if (mToneGenerator == null) { |
| Log.w(LOG_TAG, "playTone: mToneGenerator == null, tone: " + tone); |
| return; |
| } |
| |
| // Start the new tone (will stop any playing tone) |
| mToneGenerator.startTone(tone, TONE_LENGTH_MS); |
| } |
| } |
| |
| private CharSequence createErrorMessage(String number) { |
| if (!TextUtils.isEmpty(number)) { |
| String errorString = getString(R.string.dial_emergency_error, number); |
| int startingPosition = errorString.indexOf(number); |
| int endingPosition = startingPosition + number.length(); |
| Spannable result = new SpannableString(errorString); |
| PhoneNumberUtils.addTtsSpan(result, startingPosition, endingPosition); |
| return result; |
| } else { |
| return getText(R.string.dial_emergency_empty_error).toString(); |
| } |
| } |
| |
| @Override |
| protected Dialog onCreateDialog(int id) { |
| AlertDialog dialog = null; |
| if (id == BAD_EMERGENCY_NUMBER_DIALOG) { |
| // construct dialog |
| dialog = new AlertDialog.Builder(this, R.style.EmergencyDialerAlertDialogTheme) |
| .setTitle(getText(R.string.emergency_enable_radio_dialog_title)) |
| .setMessage(createErrorMessage(mLastNumber)) |
| .setPositiveButton(R.string.ok, null) |
| .setCancelable(true).create(); |
| |
| // blur stuff behind the dialog |
| dialog.getWindow().addFlags(WindowManager.LayoutParams.FLAG_BLUR_BEHIND); |
| setShowWhenLocked(true); |
| } |
| return dialog; |
| } |
| |
| @Override |
| protected void onPrepareDialog(int id, Dialog dialog) { |
| super.onPrepareDialog(id, dialog); |
| if (id == BAD_EMERGENCY_NUMBER_DIALOG) { |
| AlertDialog alert = (AlertDialog) dialog; |
| alert.setMessage(createErrorMessage(mLastNumber)); |
| } |
| } |
| |
| @Override |
| public boolean onOptionsItemSelected(MenuItem item) { |
| final int itemId = item.getItemId(); |
| if (itemId == android.R.id.home) { |
| onBackPressed(); |
| return true; |
| } |
| return super.onOptionsItemSelected(item); |
| } |
| |
| /** |
| * Update the enabledness of the "Dial" and "Backspace" buttons if applicable. |
| */ |
| private void updateDialAndDeleteButtonStateEnabledAttr() { |
| final boolean notEmpty = mDigits.length() != 0; |
| |
| mDelete.setEnabled(notEmpty); |
| } |
| |
| /** |
| * Remove the digit just before the current position. Used by various long pressed callbacks |
| * to remove the digit that was populated as a result of the short click. |
| */ |
| private void removePreviousDigitIfPossible() { |
| final int currentPosition = mDigits.getSelectionStart(); |
| if (currentPosition > 0) { |
| mDigits.setSelection(currentPosition); |
| mDigits.getText().delete(currentPosition - 1, currentPosition); |
| } |
| } |
| |
| /** |
| * Update the text-to-speech annotations in the edit field. |
| */ |
| private void updateTtsSpans() { |
| for (Object o : mDigits.getText().getSpans(0, mDigits.getText().length(), TtsSpan.class)) { |
| mDigits.getText().removeSpan(o); |
| } |
| PhoneNumberUtils.ttsSpanAsPhoneNumber(mDigits.getText(), 0, mDigits.getText().length()); |
| } |
| |
| @Override |
| public void onColorsChanged(WallpaperColors colors, int which) { |
| if ((which & WallpaperManager.FLAG_LOCK) != 0) { |
| mBackgroundDrawable.setColor(getPrimaryColor(colors)); |
| updateTheme(supportsDarkText(colors)); |
| } |
| } |
| |
| /** |
| * Where a carrier requires a warning that emergency calling is not available while on WFC, |
| * add hint text above the dial pad which warns the user of this case. |
| */ |
| private void maybeShowWfcEmergencyCallingWarning() { |
| if (!mIsWfcEmergencyCallingWarningEnabled) { |
| Log.i(LOG_TAG, "maybeShowWfcEmergencyCallingWarning: warning disabled by carrier."); |
| return; |
| } |
| |
| // Use an async task rather than calling into Telephony on UI thread. |
| AsyncTask<Void, Void, Boolean> showWfcWarningTask = new AsyncTask<Void, Void, Boolean>() { |
| @Override |
| protected Boolean doInBackground(Void... voids) { |
| TelephonyManager tm = getSystemService(TelephonyManager.class); |
| boolean isWfcAvailable = tm.isWifiCallingAvailable(); |
| ServiceState ss = tm.getServiceState(); |
| boolean isCellAvailable = |
| ss.getRilVoiceRadioTechnology() != RIL_RADIO_TECHNOLOGY_UNKNOWN; |
| Log.i(LOG_TAG, "showWfcWarningTask: isWfcAvailable=" + isWfcAvailable |
| + " isCellAvailable=" + isCellAvailable |
| + "(rat=" + ss.getRilVoiceRadioTechnology() + ")"); |
| return isWfcAvailable && !isCellAvailable; |
| } |
| |
| @Override |
| protected void onPostExecute(Boolean result) { |
| if (result.booleanValue()) { |
| Log.i(LOG_TAG, "showWfcWarningTask: showing ecall warning"); |
| mDigits.setHint(R.string.dial_emergency_calling_not_available); |
| } else { |
| Log.i(LOG_TAG, "showWfcWarningTask: hiding ecall warning"); |
| mDigits.setHint(""); |
| } |
| maybeChangeHintSize(); |
| } |
| }; |
| showWfcWarningTask.execute((Void) null); |
| } |
| |
| /** |
| * Where a hint is applied and there are no digits dialed, disable autoresize of the dial digits |
| * edit view and set the font size to a smaller size appropriate for the emergency calling |
| * warning. |
| */ |
| private void maybeChangeHintSize() { |
| if (TextUtils.isEmpty(mDigits.getHint()) |
| || !TextUtils.isEmpty(mDigits.getText().toString())) { |
| // No hint or there are dialed digits, so use default size. |
| mDigits.setTextSize(TypedValue.COMPLEX_UNIT_SP, mDefaultDigitsTextSize); |
| // By default, the digits view auto-resizes to fit the text it contains, so |
| // enable that now. |
| mDigits.setResizeEnabled(true); |
| Log.i(LOG_TAG, "no hint - setting to " + mDigits.getScaledTextSize()); |
| } else { |
| // Hint present and no dialed digits, set custom font size appropriate for the warning. |
| mDigits.setTextSize(TypedValue.COMPLEX_UNIT_PX, getResources().getDimensionPixelSize( |
| R.dimen.emergency_call_warning_size)); |
| // Since we're populating this with a static text string, disable auto-resize. |
| mDigits.setResizeEnabled(false); |
| Log.i(LOG_TAG, "hint - setting to " + mDigits.getScaledTextSize()); |
| } |
| } |
| |
| private void setupEmergencyDialpadViews() { |
| mEmergencyInfoInDialpad.setOnConfirmClickListener(this); |
| } |
| |
| private void setupEmergencyShortcutsView() { |
| mEmergencyShortcutView = findViewById(R.id.emergency_dialer_shortcuts); |
| mDialpadView = findViewById(R.id.emergency_dialer); |
| |
| mEmergencyShortcutView.setAccessibilityDelegate(mAccessibilityDelegate); |
| mDialpadView.setAccessibilityDelegate(mAccessibilityDelegate); |
| |
| final View dialpadButton = findViewById(R.id.floating_action_button_dialpad); |
| dialpadButton.setOnClickListener(this); |
| |
| mEmergencyInfoInShortcut.setOnConfirmClickListener(this); |
| |
| mEmergencyShortcutButtonList = new ArrayList<>(); |
| setupEmergencyCallShortcutButton(); |
| |
| updateLocationAndEccInfo(); |
| |
| switchView(mEmergencyShortcutView, mDialpadView, false); |
| } |
| |
| private void setLocationInfo() { |
| final View locationInfo = findViewById(R.id.location_info); |
| |
| String countryIso = mShortcutViewConfig.getCountryIso(); |
| String countryName = null; |
| if (!TextUtils.isEmpty(countryIso)) { |
| Locale locale = Locale.getDefault(); |
| countryName = new Locale(locale.getLanguage(), countryIso, locale.getVariant()) |
| .getDisplayCountry(); |
| } |
| if (TextUtils.isEmpty(countryName)) { |
| locationInfo.setVisibility(View.INVISIBLE); |
| } else { |
| final TextView location = (TextView) locationInfo.findViewById(R.id.location_text); |
| location.setText(countryName); |
| locationInfo.setVisibility(View.VISIBLE); |
| } |
| } |
| |
| private void setupEmergencyCallShortcutButton() { |
| final ViewGroup shortcutButtonContainer = findViewById( |
| R.id.emergency_shortcut_buttons_container); |
| shortcutButtonContainer.setClipToOutline(true); |
| final TextView emergencyNumberTitle = findViewById(R.id.emergency_number_title); |
| |
| mShortcutAdapter = new EccShortcutAdapter(this) { |
| @Override |
| public View inflateView(View convertView, ViewGroup parent, CharSequence number, |
| CharSequence description, int iconRes) { |
| EmergencyShortcutButton button = (EmergencyShortcutButton) getLayoutInflater() |
| .inflate(R.layout.emergency_shortcut_button, parent, false); |
| button.setPhoneNumber(number); |
| button.setPhoneDescription(description); |
| button.setPhoneTypeIcon(iconRes); |
| button.setOnConfirmClickListener(EmergencyDialer.this); |
| return button; |
| } |
| }; |
| mShortcutDataSetObserver = new DataSetObserver() { |
| @Override |
| public void onChanged() { |
| super.onChanged(); |
| updateLayout(); |
| } |
| |
| @Override |
| public void onInvalidated() { |
| super.onInvalidated(); |
| updateLayout(); |
| } |
| |
| private void updateLayout() { |
| // clear previous added buttons |
| shortcutButtonContainer.removeAllViews(); |
| mEmergencyShortcutButtonList.clear(); |
| |
| for (int i = 0; i < mShortcutAdapter.getCount() && i < SHORTCUT_SIZE_LIMIT; ++i) { |
| EmergencyShortcutButton button = (EmergencyShortcutButton) |
| mShortcutAdapter.getView(i, null, shortcutButtonContainer); |
| mEmergencyShortcutButtonList.add(button); |
| shortcutButtonContainer.addView(button); |
| } |
| |
| // Update emergency numbers title for numerous buttons. |
| if (mEmergencyShortcutButtonList.size() > 1) { |
| emergencyNumberTitle.setText(getString( |
| R.string.numerous_emergency_numbers_title)); |
| } else { |
| emergencyNumberTitle.setText(getText(R.string.single_emergency_number_title)); |
| } |
| } |
| }; |
| mShortcutAdapter.registerDataSetObserver(mShortcutDataSetObserver); |
| } |
| |
| private void updateLocationAndEccInfo() { |
| if (!isFinishing() && !isDestroyed()) { |
| setLocationInfo(); |
| if (mShortcutAdapter != null) { |
| mShortcutAdapter.updateCountryEccInfo(this, mShortcutViewConfig.getPhoneInfo()); |
| } |
| } |
| } |
| |
| /** |
| * Called by the activity before a touch event is dispatched to the view hierarchy. |
| */ |
| private void onPreTouchEvent(MotionEvent event) { |
| mEmergencyInfoInDialpad.onPreTouchEvent(event); |
| mEmergencyInfoInShortcut.onPreTouchEvent(event); |
| |
| if (mEmergencyShortcutButtonList != null) { |
| for (EmergencyShortcutButton button : mEmergencyShortcutButtonList) { |
| button.onPreTouchEvent(event); |
| } |
| } |
| } |
| |
| /** |
| * Called by the activity after a touch event is dispatched to the view hierarchy. |
| */ |
| private void onPostTouchEvent(MotionEvent event) { |
| mEmergencyInfoInDialpad.onPostTouchEvent(event); |
| mEmergencyInfoInShortcut.onPostTouchEvent(event); |
| |
| if (mEmergencyShortcutButtonList != null) { |
| for (EmergencyShortcutButton button : mEmergencyShortcutButtonList) { |
| button.onPostTouchEvent(event); |
| } |
| } |
| } |
| |
| /** |
| * Switch two view. |
| * |
| * @param displayView the view would be displayed. |
| * @param hideView the view would be hidden. |
| * @param hasAnimation is {@code true} when the view should be displayed with animation. |
| */ |
| private void switchView(View displayView, View hideView, boolean hasAnimation) { |
| if (displayView == null || hideView == null) { |
| return; |
| } |
| |
| if (displayView.getVisibility() == View.VISIBLE) { |
| return; |
| } |
| |
| if (hasAnimation) { |
| crossfade(hideView, displayView); |
| } else { |
| hideView.setVisibility(View.GONE); |
| displayView.setVisibility(View.VISIBLE); |
| } |
| } |
| |
| /** |
| * Fade out and fade in animation between two view transition. |
| */ |
| private void crossfade(View fadeOutView, View fadeInView) { |
| if (fadeOutView == null || fadeInView == null) { |
| return; |
| } |
| final int shortAnimationDuration = getResources().getInteger( |
| android.R.integer.config_shortAnimTime); |
| |
| fadeInView.setAlpha(0f); |
| fadeInView.setVisibility(View.VISIBLE); |
| |
| fadeInView.animate() |
| .alpha(1f) |
| .setDuration(shortAnimationDuration) |
| .setListener(null); |
| |
| fadeOutView.animate() |
| .alpha(0f) |
| .setDuration(shortAnimationDuration) |
| .setListener(new AnimatorListenerAdapter() { |
| @Override |
| public void onAnimationEnd(Animator animation) { |
| fadeOutView.setVisibility(View.GONE); |
| } |
| }); |
| } |
| |
| private boolean isShortcutNumber(String number) { |
| if (TextUtils.isEmpty(number) || mEmergencyShortcutButtonList == null) { |
| return false; |
| } |
| |
| boolean isShortcut = false; |
| for (EmergencyShortcutButton button : mEmergencyShortcutButtonList) { |
| if (button != null && number.equals(button.getPhoneNumber())) { |
| isShortcut = true; |
| break; |
| } |
| } |
| return isShortcut; |
| } |
| |
| private String entryTypeToString(int entryType) { |
| switch (entryType) { |
| case ENTRY_TYPE_LOCKSCREEN_BUTTON: |
| return "LockScreen"; |
| case ENTRY_TYPE_POWER_MENU: |
| return "PowerMenu"; |
| default: |
| return "Unknown-" + entryType; |
| } |
| } |
| |
| private String callSourceToString(int callSource) { |
| switch (callSource) { |
| case TelecomManager.CALL_SOURCE_EMERGENCY_DIALPAD: |
| return "DialPad"; |
| case TelecomManager.CALL_SOURCE_EMERGENCY_SHORTCUT: |
| return "Shortcut"; |
| default: |
| return "Unknown-" + callSource; |
| } |
| } |
| |
| private WallpaperManager getWallpaperManager() { |
| return getSystemService(WallpaperManager.class); |
| } |
| |
| private static boolean supportsDarkText(WallpaperColors colors) { |
| if (colors != null) { |
| return (colors.getColorHints() & WallpaperColors.HINT_SUPPORTS_DARK_TEXT) != 0; |
| } |
| // It's possible that wallpaper colors are null (e.g. when colors are being |
| // processed or a live wallpaper is used). In this case, fallback to same |
| // behavior as when shortcut view is enabled. |
| return false; |
| } |
| |
| private int getPrimaryColor(WallpaperColors colors) { |
| if (colors != null) { |
| // Android accessibility scanner |
| // (https://support.google.com/accessibility/android/answer/7158390) |
| // suggest small text and graphics have a contrast ratio greater than |
| // 4.5 with background color. The color generated from wallpaper may not |
| // follow this rule. Calculate a proper color here. |
| Color primary = colors.getPrimaryColor(); |
| Color text; |
| if (mSupportsDarkText) { |
| text = Color.valueOf(Color.BLACK); |
| } else { |
| text = Color.valueOf(Color.WHITE); |
| } |
| Color dial = Color.valueOf(DIALER_GREEN); |
| // If current primary color can't follow the contrast ratio rule, make it |
| // deeper/lighter and try again. |
| while (!checkContrastRatio(primary, text)) { |
| primary = getNextColor(primary, mSupportsDarkText); |
| } |
| if (!mSupportsDarkText) { |
| while (!checkContrastRatio(primary, dial)) { |
| primary = getNextColor(primary, mSupportsDarkText); |
| } |
| } |
| return primary.toArgb(); |
| } |
| // It's possible that wallpaper colors are null (e.g. when colors are being |
| // processed or a live wallpaper is used). In this case, fallback to same |
| // behavior as when shortcut view is enabled. |
| return Color.BLACK; |
| } |
| |
| private Color getNextColor(Color color, boolean darkText) { |
| float sign = darkText ? 1.f : -1.f; |
| float r = color.red() + sign * COLOR_DELTA; |
| float g = color.green() + sign * COLOR_DELTA; |
| float b = color.blue() + sign * COLOR_DELTA; |
| if (r < 0f) r = 0f; |
| if (g < 0f) g = 0f; |
| if (b < 0f) b = 0f; |
| if (r > 1f) r = 1f; |
| if (g > 1f) g = 1f; |
| if (b > 1f) b = 1f; |
| return Color.valueOf(r, g, b); |
| } |
| |
| private boolean checkContrastRatio(Color color1, Color color2) { |
| float lum1 = color1.luminance(); |
| float lum2 = color2.luminance(); |
| double cr; |
| if (lum1 >= lum2) { |
| cr = (lum1 + 0.05) / (lum2 + 0.05); |
| } else { |
| cr = (lum2 + 0.05) / (lum1 + 0.05); |
| } |
| |
| // Make cr greater than 5.0 instead of 4.5 to guarantee that transparent white |
| // text and graphics can have contrast ratio greather than 4.5 with background. |
| return cr > 5.0; |
| } |
| } |
