src/com/android/contacts/dialog/CallSubjectDialog.java - LeafOS-Project/android_packages_apps_Contacts - Gitiles

 /*
  * Copyright (C) 2015 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.contacts.dialog;

 import android.animation.Animator;
 import android.animation.AnimatorListenerAdapter;
 import android.app.Activity;
 import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
 import android.net.Uri;
 import android.os.Bundle;
 import android.preference.PreferenceManager;
 import android.telecom.PhoneAccount;
 import android.telecom.PhoneAccountHandle;
 import android.telecom.TelecomManager;
 import android.text.Editable;
 import android.text.InputFilter;
 import android.text.TextUtils;
 import android.text.TextWatcher;
 import android.util.Log;
 import android.view.View;
 import android.view.ViewGroup;
 import android.view.ViewTreeObserver;
 import android.view.inputmethod.InputMethodManager;
 import android.widget.AdapterView;
 import android.widget.ArrayAdapter;
 import android.widget.EditText;
 import android.widget.ListView;
 import android.widget.QuickContactBadge;
 import android.widget.TextView;

 import com.android.contacts.CallUtil;
 import com.android.contacts.ContactPhotoManager;
 import com.android.contacts.R;
 import com.android.contacts.compat.CompatUtils;
 import com.android.contacts.compat.PhoneAccountSdkCompat;
 import com.android.contacts.compat.telecom.TelecomManagerCompat;
 import com.android.contacts.util.UriUtils;
 import com.android.phone.common.animation.AnimUtils;

 import java.nio.charset.Charset;
 import java.util.ArrayList;
 import java.util.List;

 /**
  * Implements a dialog which prompts for a call subject for an outgoing call.  The dialog includes
  * a pop up list of historical call subjects.
  */
 public class CallSubjectDialog extends Activity {
     private static final String TAG = "CallSubjectDialog";
     private static final int CALL_SUBJECT_LIMIT = 16;
     private static final int CALL_SUBJECT_HISTORY_SIZE = 5;

     private static final int REQUEST_SUBJECT = 1001;

     public static final String PREF_KEY_SUBJECT_HISTORY_COUNT = "subject_history_count";
     public static final String PREF_KEY_SUBJECT_HISTORY_ITEM = "subject_history_item";

     /**
      * Activity intent argument bundle keys:
      */
     public static final String ARG_PHOTO_ID = "PHOTO_ID";
     public static final String ARG_PHOTO_URI = "PHOTO_URI";
     public static final String ARG_CONTACT_URI = "CONTACT_URI";
     public static final String ARG_NAME_OR_NUMBER = "NAME_OR_NUMBER";
     public static final String ARG_IS_BUSINESS = "IS_BUSINESS";
     public static final String ARG_NUMBER = "NUMBER";
     public static final String ARG_DISPLAY_NUMBER = "DISPLAY_NUMBER";
     public static final String ARG_NUMBER_LABEL = "NUMBER_LABEL";
     public static final String ARG_PHONE_ACCOUNT_HANDLE = "PHONE_ACCOUNT_HANDLE";

     private int mAnimationDuration;
     private Charset mMessageEncoding;
     private View mBackgroundView;
     private View mDialogView;
     private QuickContactBadge mContactPhoto;
     private TextView mNameView;
     private TextView mNumberView;
     private EditText mCallSubjectView;
     private TextView mCharacterLimitView;
     private View mHistoryButton;
     private View mSendAndCallButton;
     private ListView mSubjectList;

     private int mLimit = CALL_SUBJECT_LIMIT;
     private int mPhotoSize;
     private SharedPreferences mPrefs;
     private List<String> mSubjectHistory;

     private long mPhotoID;
     private Uri mPhotoUri;
     private Uri mContactUri;
     private String mNameOrNumber;
     private boolean mIsBusiness;
     private String mNumber;
     private String mDisplayNumber;
     private String mNumberLabel;
     private PhoneAccountHandle mPhoneAccountHandle;

     /**
      * Handles changes to the text in the subject box.  Ensures the character limit is updated.
      */
     private final TextWatcher mTextWatcher = new TextWatcher() {
         @Override
         public void beforeTextChanged(CharSequence s, int start, int count, int after) {
             // no-op
         }

         @Override
         public void onTextChanged(CharSequence s, int start, int before, int count) {
             updateCharacterLimit();
         }

         @Override
         public void afterTextChanged(Editable s) {
             // no-op
         }
     };

     /**
      * Click listener which handles user clicks outside of the dialog.
      */
     private View.OnClickListener mBackgroundListener = new View.OnClickListener() {
         @Override
         public void onClick(View v) {
             finish();
         }
     };

     /**
      * Handles displaying the list of past call subjects.
      */
     private final View.OnClickListener mHistoryOnClickListener = new View.OnClickListener() {
         @Override
         public void onClick(View v) {
             hideSoftKeyboard(CallSubjectDialog.this, mCallSubjectView);
             showCallHistory(mSubjectList.getVisibility() == View.GONE);
         }
     };

     /**
      * Handles starting a call with a call subject specified.
      */
     private final View.OnClickListener mSendAndCallOnClickListener = new View.OnClickListener() {
         @Override
         public void onClick(View v) {
             String subject = mCallSubjectView.getText().toString();
             Intent intent = CallUtil.getCallWithSubjectIntent(mNumber, mPhoneAccountHandle,
                     subject);

             TelecomManagerCompat.placeCall(
                     CallSubjectDialog.this,
                     (TelecomManager) getSystemService(Context.TELECOM_SERVICE),
                     intent);

             mSubjectHistory.add(subject);
             saveSubjectHistory(mSubjectHistory);
             finish();
         }
     };

     /**
      * Handles auto-hiding the call history when user clicks in the call subject field to give it
      * focus.
      */
     private final View.OnClickListener mCallSubjectClickListener = new View.OnClickListener() {
         @Override
         public void onClick(View v) {
             if (mSubjectList.getVisibility() == View.VISIBLE) {
                 showCallHistory(false);
             }
         }
     };

     /**
      * Item click listener which handles user clicks on the items in the list view.  Dismisses
      * the activity, returning the subject to the caller and closing the activity with the
      * {@link Activity#RESULT_OK} result code.
      */
     private AdapterView.OnItemClickListener mItemClickListener =
             new AdapterView.OnItemClickListener() {
                 @Override
                 public void onItemClick(AdapterView<?> arg0, View view, int position, long arg3) {
                     mCallSubjectView.setText(mSubjectHistory.get(position));
                     showCallHistory(false);
                 }
             };

     /**
      * Show the call subject dialog given a phone number to dial (e.g. from the dialpad).
      *
      * @param activity The activity.
      * @param number The number to dial.
      */
     public static void start(Activity activity, String number) {
         start(activity,
                 -1 /* photoId */,
                 null /* photoUri */,
                 null /* contactUri */,
                 number /* nameOrNumber */,
                 false /* isBusiness */,
                 number /* number */,
                 null /* displayNumber */,
                 null /* numberLabel */,
                 null /* phoneAccountHandle */);
     }

     /**
      * Creates a call subject dialog.
      *
      * @param activity The current activity.
      * @param photoId The photo ID (used to populate contact photo).
      * @param photoUri The photo Uri (used to populate contact photo).
      * @param contactUri The Contact URI (used so quick contact can be invoked from contact photo).
      * @param nameOrNumber The name or number of the callee.
      * @param isBusiness {@code true} if a business is being called (used for contact photo).
      * @param number The raw number to dial.
      * @param displayNumber The number to dial, formatted for display.
      * @param numberLabel The label for the number (if from a contact).
      * @param phoneAccountHandle The phone account handle.
      */
     public static void start(Activity activity, long photoId, Uri photoUri, Uri contactUri,
             String nameOrNumber, boolean isBusiness, String number, String displayNumber,
             String numberLabel, PhoneAccountHandle phoneAccountHandle) {
         Bundle arguments = new Bundle();
         arguments.putLong(ARG_PHOTO_ID, photoId);
         arguments.putParcelable(ARG_PHOTO_URI, photoUri);
         arguments.putParcelable(ARG_CONTACT_URI, contactUri);
         arguments.putString(ARG_NAME_OR_NUMBER, nameOrNumber);
         arguments.putBoolean(ARG_IS_BUSINESS, isBusiness);
         arguments.putString(ARG_NUMBER, number);
         arguments.putString(ARG_DISPLAY_NUMBER, displayNumber);
         arguments.putString(ARG_NUMBER_LABEL, numberLabel);
         arguments.putParcelable(ARG_PHONE_ACCOUNT_HANDLE, phoneAccountHandle);
         start(activity, arguments);
     }

     /**
      * Shows the call subject dialog given a Bundle containing all the arguments required to
      * display the dialog (e.g. from Quick Contacts).
      *
      * @param activity The activity.
      * @param arguments The arguments bundle.
      */
     public static void start(Activity activity, Bundle arguments) {
         Intent intent = new Intent(activity, CallSubjectDialog.class);
         intent.putExtras(arguments);
         activity.startActivity(intent);
     }

     /**
      * Creates the dialog, inflating the layout and populating it with the name and phone number.
      *
      * @param savedInstanceState The last saved instance state of the Fragment,
      * or null if this is a freshly created Fragment.
      *
      * @return Dialog instance.
      */
     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         getWindow().setHideOverlayWindows(true);
         mAnimationDuration = getResources().getInteger(R.integer.call_subject_animation_duration);
         mPrefs = PreferenceManager.getDefaultSharedPreferences(this);
         mPhotoSize = getResources().getDimensionPixelSize(
                 R.dimen.call_subject_dialog_contact_photo_size);
         readArguments();
         loadConfiguration();
         mSubjectHistory = loadSubjectHistory(mPrefs);

         setContentView(R.layout.dialog_call_subject);
         getWindow().setLayout(ViewGroup.LayoutParams.MATCH_PARENT,
                 ViewGroup.LayoutParams.MATCH_PARENT);
         mBackgroundView = findViewById(R.id.call_subject_dialog);
         mBackgroundView.setOnClickListener(mBackgroundListener);
         mDialogView = findViewById(R.id.dialog_view);
         mContactPhoto = (QuickContactBadge) findViewById(R.id.contact_photo);
         mNameView = (TextView) findViewById(R.id.name);
         mNumberView = (TextView) findViewById(R.id.number);
         mCallSubjectView = (EditText) findViewById(R.id.call_subject);
         mCallSubjectView.addTextChangedListener(mTextWatcher);
         mCallSubjectView.setOnClickListener(mCallSubjectClickListener);
         InputFilter[] filters = new InputFilter[1];
         filters[0] = new InputFilter.LengthFilter(mLimit);
         mCallSubjectView.setFilters(filters);
         mCharacterLimitView = (TextView) findViewById(R.id.character_limit);
         mHistoryButton = findViewById(R.id.history_button);
         mHistoryButton.setOnClickListener(mHistoryOnClickListener);
         mHistoryButton.setVisibility(mSubjectHistory.isEmpty() ? View.GONE : View.VISIBLE);
         mSendAndCallButton = findViewById(R.id.send_and_call_button);
         mSendAndCallButton.setOnClickListener(mSendAndCallOnClickListener);
         mSubjectList = (ListView) findViewById(R.id.subject_list);
         mSubjectList.setOnItemClickListener(mItemClickListener);
         mSubjectList.setVisibility(View.GONE);

         updateContactInfo();
         updateCharacterLimit();
     }

     /**
      * Populates the contact info fields based on the current contact information.
      */
     private void updateContactInfo() {
         if (mContactUri != null) {
             setPhoto(mPhotoID, mPhotoUri, mContactUri, mNameOrNumber, mIsBusiness);
         } else {
             mContactPhoto.setVisibility(View.GONE);
         }
         mNameView.setText(mNameOrNumber);
         if (!TextUtils.isEmpty(mNumberLabel) && !TextUtils.isEmpty(mDisplayNumber)) {
             mNumberView.setVisibility(View.VISIBLE);
             mNumberView.setText(getString(R.string.call_subject_type_and_number,
                     mNumberLabel, mDisplayNumber));
         } else {
             mNumberView.setVisibility(View.GONE);
             mNumberView.setText(null);
         }
     }

     /**
      * Reads arguments from the fragment arguments and populates the necessary instance variables.
      */
     private void readArguments() {
         Bundle arguments = getIntent().getExtras();
         if (arguments == null) {
             Log.e(TAG, "Arguments cannot be null.");
             return;
         }
         mPhotoID = arguments.getLong(ARG_PHOTO_ID);
         mPhotoUri = arguments.getParcelable(ARG_PHOTO_URI);
         mContactUri = arguments.getParcelable(ARG_CONTACT_URI);
         mNameOrNumber = arguments.getString(ARG_NAME_OR_NUMBER);
         mIsBusiness = arguments.getBoolean(ARG_IS_BUSINESS);
         mNumber = arguments.getString(ARG_NUMBER);
         mDisplayNumber = arguments.getString(ARG_DISPLAY_NUMBER);
         mNumberLabel = arguments.getString(ARG_NUMBER_LABEL);
         mPhoneAccountHandle = arguments.getParcelable(ARG_PHONE_ACCOUNT_HANDLE);
     }

     /**
      * Updates the character limit display, coloring the text RED when the limit is reached or
      * exceeded.
      */
     private void updateCharacterLimit() {
         String subjectText = mCallSubjectView.getText().toString();
         final int length;

         // If a message encoding is specified, use that to count bytes in the message.
         if (mMessageEncoding != null) {
             length = subjectText.getBytes(mMessageEncoding).length;
         } else {
             // No message encoding specified, so just count characters entered.
             length = subjectText.length();
         }

         mCharacterLimitView.setText(
                 getString(R.string.call_subject_limit, length, mLimit));
         if (length >= mLimit) {
             mCharacterLimitView.setTextColor(getResources().getColor(
                     R.color.call_subject_limit_exceeded));
         } else {
             mCharacterLimitView.setTextColor(getResources().getColor(
                     R.color.dialtacts_secondary_text_color));
         }
     }

     /**
      * Sets the photo on the quick contact photo.
      *
      * @param photoId
      * @param photoUri
      * @param contactUri
      * @param displayName
      * @param isBusiness
      */
     private void setPhoto(long photoId, Uri photoUri, Uri contactUri, String displayName,
             boolean isBusiness) {
         mContactPhoto.assignContactUri(contactUri);
         if (CompatUtils.isLollipopCompatible()) {
             mContactPhoto.setOverlay(null);
         }

         int contactType;
         if (isBusiness) {
             contactType = ContactPhotoManager.TYPE_BUSINESS;
         } else {
             contactType = ContactPhotoManager.TYPE_DEFAULT;
         }

         String lookupKey = null;
         if (contactUri != null) {
             lookupKey = UriUtils.getLookupKeyFromUri(contactUri);
         }

         ContactPhotoManager.DefaultImageRequest
                 request = new ContactPhotoManager.DefaultImageRequest(
                 displayName, lookupKey, contactType, true /* isCircular */);

         if (photoId == 0 && photoUri != null) {
             ContactPhotoManager.getInstance(this).loadPhoto(mContactPhoto, photoUri,
                     mPhotoSize, false /* darkTheme */, true /* isCircular */, request);
         } else {
             ContactPhotoManager.getInstance(this).loadThumbnail(mContactPhoto, photoId,
                     false /* darkTheme */, true /* isCircular */, request);
         }
     }

     /**
      * Loads the subject history from shared preferences.
      *
      * @param prefs Shared preferences.
      * @return List of subject history strings.
      */
     public static List<String> loadSubjectHistory(SharedPreferences prefs) {
         int historySize = prefs.getInt(PREF_KEY_SUBJECT_HISTORY_COUNT, 0);
         List<String> subjects = new ArrayList(historySize);

         for (int ix = 0 ; ix < historySize; ix++) {
             String historyItem = prefs.getString(PREF_KEY_SUBJECT_HISTORY_ITEM + ix, null);
             if (!TextUtils.isEmpty(historyItem)) {
                 subjects.add(historyItem);
             }
         }

         return subjects;
     }

     /**
      * Saves the subject history list to shared prefs, removing older items so that there are only
      * {@link #CALL_SUBJECT_HISTORY_SIZE} items at most.
      *
      * @param history The history.
      */
     private void saveSubjectHistory(List<String> history) {
         // Remove oldest subject(s).
         while (history.size() > CALL_SUBJECT_HISTORY_SIZE) {
             history.remove(0);
         }

         SharedPreferences.Editor editor = mPrefs.edit();
         int historyCount = 0;
         for (String subject : history) {
             if (!TextUtils.isEmpty(subject)) {
                 editor.putString(PREF_KEY_SUBJECT_HISTORY_ITEM + historyCount,
                         subject);
                 historyCount++;
             }
         }
         editor.putInt(PREF_KEY_SUBJECT_HISTORY_COUNT, historyCount);
         editor.apply();
     }

     /**
      * Hide software keyboard for the given {@link View}.
      */
     public void hideSoftKeyboard(Context context, View view) {
         InputMethodManager imm = (InputMethodManager) context.getSystemService(
                 Context.INPUT_METHOD_SERVICE);
         if (imm != null) {
             imm.hideSoftInputFromWindow(view.getWindowToken(), InputMethodManager.HIDE_NOT_ALWAYS);
         }
     }

     /**
      * Hides or shows the call history list.
      *
      * @param show {@code true} if the call history should be shown, {@code false} otherwise.
      */
     private void showCallHistory(final boolean show) {
         // Bail early if the visibility has not changed.
         if ((show && mSubjectList.getVisibility() == View.VISIBLE) ||
                 (!show && mSubjectList.getVisibility() == View.GONE)) {
             return;
         }

         final int dialogStartingBottom = mDialogView.getBottom();
         if (show) {
             // Showing the subject list; bind the list of history items to the list and show it.
             ArrayAdapter<String> adapter = new ArrayAdapter<String>(CallSubjectDialog.this,
                     R.layout.call_subject_history_list_item, mSubjectHistory);
             mSubjectList.setAdapter(adapter);
             mSubjectList.setVisibility(View.VISIBLE);
         } else {
             // Hiding the subject list.
             mSubjectList.setVisibility(View.GONE);
         }

         // Use a ViewTreeObserver so that we can animate between the pre-layout and post-layout
         // states.
         final ViewTreeObserver observer = mBackgroundView.getViewTreeObserver();
         observer.addOnPreDrawListener(
                 new ViewTreeObserver.OnPreDrawListener() {
                     @Override
                     public boolean onPreDraw() {
                         // We don't want to continue getting called.
                         if (observer.isAlive()) {
                             observer.removeOnPreDrawListener(this);
                         }

                         // Determine the amount the dialog has shifted due to the relayout.
                         int shiftAmount = dialogStartingBottom - mDialogView.getBottom();

                         // If the dialog needs to be shifted, do that now.
                         if (shiftAmount != 0) {
                             // Start animation in translated state and animate to translationY 0.
                             mDialogView.setTranslationY(shiftAmount);
                             mDialogView.animate()
                                     .translationY(0)
                                     .setInterpolator(AnimUtils.EASE_OUT_EASE_IN)
                                     .setDuration(mAnimationDuration)
                                     .start();
                         }

                         if (show) {
                             // Show the subhect list.
                             mSubjectList.setTranslationY(mSubjectList.getHeight());

                             mSubjectList.animate()
                                     .translationY(0)
                                     .setInterpolator(AnimUtils.EASE_OUT_EASE_IN)
                                     .setDuration(mAnimationDuration)
                                     .setListener(new AnimatorListenerAdapter() {
                                         @Override
                                         public void onAnimationEnd(Animator animation) {
                                             super.onAnimationEnd(animation);
                                         }

                                         @Override
                                         public void onAnimationStart(Animator animation) {
                                             super.onAnimationStart(animation);
                                             mSubjectList.setVisibility(View.VISIBLE);
                                         }
                                     })
                                     .start();
                         } else {
                             // Hide the subject list.
                             mSubjectList.setTranslationY(0);

                             mSubjectList.animate()
                                     .translationY(mSubjectList.getHeight())
                                     .setInterpolator(AnimUtils.EASE_OUT_EASE_IN)
                                     .setDuration(mAnimationDuration)
                                     .setListener(new AnimatorListenerAdapter() {
                                         @Override
                                         public void onAnimationEnd(Animator animation) {
                                             super.onAnimationEnd(animation);
                                             mSubjectList.setVisibility(View.GONE);
                                         }

                                         @Override
                                         public void onAnimationStart(Animator animation) {
                                             super.onAnimationStart(animation);
                                         }
                                     })
                                     .start();
                         }
                         return true;
                     }
                 }
         );
     }

     /**
      * Loads the message encoding and maximum message length from the phone account extras for the
      * current phone account.
      */
     private void loadConfiguration() {
         // Only attempt to load configuration from the phone account extras if the SDK is N or
         // later.  If we've got a prior SDK the default encoding and message length will suffice.
         int sdk = android.os.Build.VERSION.SDK_INT;
         if(sdk <= android.os.Build.VERSION_CODES.M) {
             return;
         }

         if (mPhoneAccountHandle == null) {
             return;
         }

         TelecomManager telecomManager =
                 (TelecomManager) getSystemService(Context.TELECOM_SERVICE);
         final PhoneAccount account = telecomManager.getPhoneAccount(mPhoneAccountHandle);

         Bundle phoneAccountExtras = PhoneAccountSdkCompat.getExtras(account);
         if (phoneAccountExtras == null) {
             return;
         }

         // Get limit, if provided; otherwise default to existing value.
         mLimit = phoneAccountExtras
                 .getInt(PhoneAccountSdkCompat.EXTRA_CALL_SUBJECT_MAX_LENGTH, mLimit);

         // Get charset; default to none (e.g. count characters 1:1).
         String charsetName = phoneAccountExtras.getString(
                 PhoneAccountSdkCompat.EXTRA_CALL_SUBJECT_CHARACTER_ENCODING);

         if (!TextUtils.isEmpty(charsetName)) {
             try {
                 mMessageEncoding = Charset.forName(charsetName);
             } catch (java.nio.charset.UnsupportedCharsetException uce) {
                 // Character set was invalid; log warning and fallback to none.
                 Log.w(TAG, "Invalid charset: " + charsetName);
                 mMessageEncoding = null;
             }
         } else {
             // No character set specified, so count characters 1:1.
             mMessageEncoding = null;
         }
     }
 }
	/*
	* Copyright (C) 2015 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.contacts.dialog;

	import android.animation.Animator;
	import android.animation.AnimatorListenerAdapter;
	import android.app.Activity;
	import android.content.Context;
	import android.content.Intent;
	import android.content.SharedPreferences;
	import android.net.Uri;
	import android.os.Bundle;
	import android.preference.PreferenceManager;
	import android.telecom.PhoneAccount;
	import android.telecom.PhoneAccountHandle;
	import android.telecom.TelecomManager;
	import android.text.Editable;
	import android.text.InputFilter;
	import android.text.TextUtils;
	import android.text.TextWatcher;
	import android.util.Log;
	import android.view.View;
	import android.view.ViewGroup;
	import android.view.ViewTreeObserver;
	import android.view.inputmethod.InputMethodManager;
	import android.widget.AdapterView;
	import android.widget.ArrayAdapter;
	import android.widget.EditText;
	import android.widget.ListView;
	import android.widget.QuickContactBadge;
	import android.widget.TextView;

	import com.android.contacts.CallUtil;
	import com.android.contacts.ContactPhotoManager;
	import com.android.contacts.R;
	import com.android.contacts.compat.CompatUtils;
	import com.android.contacts.compat.PhoneAccountSdkCompat;
	import com.android.contacts.compat.telecom.TelecomManagerCompat;
	import com.android.contacts.util.UriUtils;
	import com.android.phone.common.animation.AnimUtils;

	import java.nio.charset.Charset;
	import java.util.ArrayList;
	import java.util.List;

	/**
	* Implements a dialog which prompts for a call subject for an outgoing call. The dialog includes
	* a pop up list of historical call subjects.
	*/
	public class CallSubjectDialog extends Activity {
	private static final String TAG = "CallSubjectDialog";
	private static final int CALL_SUBJECT_LIMIT = 16;
	private static final int CALL_SUBJECT_HISTORY_SIZE = 5;

	private static final int REQUEST_SUBJECT = 1001;

	public static final String PREF_KEY_SUBJECT_HISTORY_COUNT = "subject_history_count";
	public static final String PREF_KEY_SUBJECT_HISTORY_ITEM = "subject_history_item";

	/**
	* Activity intent argument bundle keys:
	*/
	public static final String ARG_PHOTO_ID = "PHOTO_ID";
	public static final String ARG_PHOTO_URI = "PHOTO_URI";
	public static final String ARG_CONTACT_URI = "CONTACT_URI";
	public static final String ARG_NAME_OR_NUMBER = "NAME_OR_NUMBER";
	public static final String ARG_IS_BUSINESS = "IS_BUSINESS";
	public static final String ARG_NUMBER = "NUMBER";
	public static final String ARG_DISPLAY_NUMBER = "DISPLAY_NUMBER";
	public static final String ARG_NUMBER_LABEL = "NUMBER_LABEL";
	public static final String ARG_PHONE_ACCOUNT_HANDLE = "PHONE_ACCOUNT_HANDLE";

	private int mAnimationDuration;
	private Charset mMessageEncoding;
	private View mBackgroundView;
	private View mDialogView;
	private QuickContactBadge mContactPhoto;
	private TextView mNameView;
	private TextView mNumberView;
	private EditText mCallSubjectView;
	private TextView mCharacterLimitView;
	private View mHistoryButton;
	private View mSendAndCallButton;
	private ListView mSubjectList;

	private int mLimit = CALL_SUBJECT_LIMIT;
	private int mPhotoSize;
	private SharedPreferences mPrefs;
	private List<String> mSubjectHistory;

	private long mPhotoID;
	private Uri mPhotoUri;
	private Uri mContactUri;
	private String mNameOrNumber;
	private boolean mIsBusiness;
	private String mNumber;
	private String mDisplayNumber;
	private String mNumberLabel;
	private PhoneAccountHandle mPhoneAccountHandle;

	/**
	* Handles changes to the text in the subject box. Ensures the character limit is updated.
	*/
	private final TextWatcher mTextWatcher = new TextWatcher() {
	@Override
	public void beforeTextChanged(CharSequence s, int start, int count, int after) {
	// no-op
	}

	@Override
	public void onTextChanged(CharSequence s, int start, int before, int count) {
	updateCharacterLimit();
	}

	@Override
	public void afterTextChanged(Editable s) {
	// no-op
	}
	};

	/**
	* Click listener which handles user clicks outside of the dialog.
	*/
	private View.OnClickListener mBackgroundListener = new View.OnClickListener() {
	@Override
	public void onClick(View v) {
	finish();
	}
	};

	/**
	* Handles displaying the list of past call subjects.
	*/
	private final View.OnClickListener mHistoryOnClickListener = new View.OnClickListener() {
	@Override
	public void onClick(View v) {
	hideSoftKeyboard(CallSubjectDialog.this, mCallSubjectView);
	showCallHistory(mSubjectList.getVisibility() == View.GONE);
	}
	};

	/**
	* Handles starting a call with a call subject specified.
	*/
	private final View.OnClickListener mSendAndCallOnClickListener = new View.OnClickListener() {
	@Override
	public void onClick(View v) {
	String subject = mCallSubjectView.getText().toString();
	Intent intent = CallUtil.getCallWithSubjectIntent(mNumber, mPhoneAccountHandle,
	subject);

	TelecomManagerCompat.placeCall(
	CallSubjectDialog.this,
	(TelecomManager) getSystemService(Context.TELECOM_SERVICE),
	intent);

	mSubjectHistory.add(subject);
	saveSubjectHistory(mSubjectHistory);
	finish();
	}
	};

	/**
	* Handles auto-hiding the call history when user clicks in the call subject field to give it
	* focus.
	*/
	private final View.OnClickListener mCallSubjectClickListener = new View.OnClickListener() {
	@Override
	public void onClick(View v) {
	if (mSubjectList.getVisibility() == View.VISIBLE) {
	showCallHistory(false);
	}
	}
	};

	/**
	* Item click listener which handles user clicks on the items in the list view. Dismisses
	* the activity, returning the subject to the caller and closing the activity with the
	* {@link Activity#RESULT_OK} result code.
	*/
	private AdapterView.OnItemClickListener mItemClickListener =
	new AdapterView.OnItemClickListener() {
	@Override
	public void onItemClick(AdapterView<?> arg0, View view, int position, long arg3) {
	mCallSubjectView.setText(mSubjectHistory.get(position));
	showCallHistory(false);
	}
	};

	/**
	* Show the call subject dialog given a phone number to dial (e.g. from the dialpad).
	*
	* @param activity The activity.
	* @param number The number to dial.
	*/
	public static void start(Activity activity, String number) {
	start(activity,
	-1 /* photoId */,
	null /* photoUri */,
	null /* contactUri */,
	number /* nameOrNumber */,
	false /* isBusiness */,
	number /* number */,
	null /* displayNumber */,
	null /* numberLabel */,
	null /* phoneAccountHandle */);
	}

	/**
	* Creates a call subject dialog.
	*
	* @param activity The current activity.
	* @param photoId The photo ID (used to populate contact photo).
	* @param photoUri The photo Uri (used to populate contact photo).
	* @param contactUri The Contact URI (used so quick contact can be invoked from contact photo).
	* @param nameOrNumber The name or number of the callee.
	* @param isBusiness {@code true} if a business is being called (used for contact photo).
	* @param number The raw number to dial.
	* @param displayNumber The number to dial, formatted for display.
	* @param numberLabel The label for the number (if from a contact).
	* @param phoneAccountHandle The phone account handle.
	*/
	public static void start(Activity activity, long photoId, Uri photoUri, Uri contactUri,
	String nameOrNumber, boolean isBusiness, String number, String displayNumber,
	String numberLabel, PhoneAccountHandle phoneAccountHandle) {
	Bundle arguments = new Bundle();
	arguments.putLong(ARG_PHOTO_ID, photoId);
	arguments.putParcelable(ARG_PHOTO_URI, photoUri);
	arguments.putParcelable(ARG_CONTACT_URI, contactUri);
	arguments.putString(ARG_NAME_OR_NUMBER, nameOrNumber);
	arguments.putBoolean(ARG_IS_BUSINESS, isBusiness);
	arguments.putString(ARG_NUMBER, number);
	arguments.putString(ARG_DISPLAY_NUMBER, displayNumber);
	arguments.putString(ARG_NUMBER_LABEL, numberLabel);
	arguments.putParcelable(ARG_PHONE_ACCOUNT_HANDLE, phoneAccountHandle);
	start(activity, arguments);
	}

	/**
	* Shows the call subject dialog given a Bundle containing all the arguments required to
	* display the dialog (e.g. from Quick Contacts).
	*
	* @param activity The activity.
	* @param arguments The arguments bundle.
	*/
	public static void start(Activity activity, Bundle arguments) {
	Intent intent = new Intent(activity, CallSubjectDialog.class);
	intent.putExtras(arguments);
	activity.startActivity(intent);
	}

	/**
	* Creates the dialog, inflating the layout and populating it with the name and phone number.
	*
	* @param savedInstanceState The last saved instance state of the Fragment,
	* or null if this is a freshly created Fragment.
	*
	* @return Dialog instance.
	*/
	@Override
	public void onCreate(Bundle savedInstanceState) {
	super.onCreate(savedInstanceState);
	getWindow().setHideOverlayWindows(true);
	mAnimationDuration = getResources().getInteger(R.integer.call_subject_animation_duration);
	mPrefs = PreferenceManager.getDefaultSharedPreferences(this);
	mPhotoSize = getResources().getDimensionPixelSize(
	R.dimen.call_subject_dialog_contact_photo_size);
	readArguments();
	loadConfiguration();
	mSubjectHistory = loadSubjectHistory(mPrefs);

	setContentView(R.layout.dialog_call_subject);
	getWindow().setLayout(ViewGroup.LayoutParams.MATCH_PARENT,
	ViewGroup.LayoutParams.MATCH_PARENT);
	mBackgroundView = findViewById(R.id.call_subject_dialog);
	mBackgroundView.setOnClickListener(mBackgroundListener);
	mDialogView = findViewById(R.id.dialog_view);
	mContactPhoto = (QuickContactBadge) findViewById(R.id.contact_photo);
	mNameView = (TextView) findViewById(R.id.name);
	mNumberView = (TextView) findViewById(R.id.number);
	mCallSubjectView = (EditText) findViewById(R.id.call_subject);
	mCallSubjectView.addTextChangedListener(mTextWatcher);
	mCallSubjectView.setOnClickListener(mCallSubjectClickListener);
	InputFilter[] filters = new InputFilter[1];
	filters[0] = new InputFilter.LengthFilter(mLimit);
	mCallSubjectView.setFilters(filters);
	mCharacterLimitView = (TextView) findViewById(R.id.character_limit);
	mHistoryButton = findViewById(R.id.history_button);
	mHistoryButton.setOnClickListener(mHistoryOnClickListener);
	mHistoryButton.setVisibility(mSubjectHistory.isEmpty() ? View.GONE : View.VISIBLE);
	mSendAndCallButton = findViewById(R.id.send_and_call_button);
	mSendAndCallButton.setOnClickListener(mSendAndCallOnClickListener);
	mSubjectList = (ListView) findViewById(R.id.subject_list);
	mSubjectList.setOnItemClickListener(mItemClickListener);
	mSubjectList.setVisibility(View.GONE);

	updateContactInfo();
	updateCharacterLimit();
	}

	/**
	* Populates the contact info fields based on the current contact information.
	*/
	private void updateContactInfo() {
	if (mContactUri != null) {
	setPhoto(mPhotoID, mPhotoUri, mContactUri, mNameOrNumber, mIsBusiness);
	} else {
	mContactPhoto.setVisibility(View.GONE);
	}
	mNameView.setText(mNameOrNumber);
	if (!TextUtils.isEmpty(mNumberLabel) && !TextUtils.isEmpty(mDisplayNumber)) {
	mNumberView.setVisibility(View.VISIBLE);
	mNumberView.setText(getString(R.string.call_subject_type_and_number,
	mNumberLabel, mDisplayNumber));
	} else {
	mNumberView.setVisibility(View.GONE);
	mNumberView.setText(null);
	}
	}

	/**
	* Reads arguments from the fragment arguments and populates the necessary instance variables.
	*/
	private void readArguments() {
	Bundle arguments = getIntent().getExtras();
	if (arguments == null) {
	Log.e(TAG, "Arguments cannot be null.");
	return;
	}
	mPhotoID = arguments.getLong(ARG_PHOTO_ID);
	mPhotoUri = arguments.getParcelable(ARG_PHOTO_URI);
	mContactUri = arguments.getParcelable(ARG_CONTACT_URI);
	mNameOrNumber = arguments.getString(ARG_NAME_OR_NUMBER);
	mIsBusiness = arguments.getBoolean(ARG_IS_BUSINESS);
	mNumber = arguments.getString(ARG_NUMBER);
	mDisplayNumber = arguments.getString(ARG_DISPLAY_NUMBER);
	mNumberLabel = arguments.getString(ARG_NUMBER_LABEL);
	mPhoneAccountHandle = arguments.getParcelable(ARG_PHONE_ACCOUNT_HANDLE);
	}

	/**
	* Updates the character limit display, coloring the text RED when the limit is reached or
	* exceeded.
	*/
	private void updateCharacterLimit() {
	String subjectText = mCallSubjectView.getText().toString();
	final int length;

	// If a message encoding is specified, use that to count bytes in the message.
	if (mMessageEncoding != null) {
	length = subjectText.getBytes(mMessageEncoding).length;
	} else {
	// No message encoding specified, so just count characters entered.
	length = subjectText.length();
	}

	mCharacterLimitView.setText(
	getString(R.string.call_subject_limit, length, mLimit));
	if (length >= mLimit) {
	mCharacterLimitView.setTextColor(getResources().getColor(
	R.color.call_subject_limit_exceeded));
	} else {
	mCharacterLimitView.setTextColor(getResources().getColor(
	R.color.dialtacts_secondary_text_color));
	}
	}

	/**
	* Sets the photo on the quick contact photo.
	*
	* @param photoId
	* @param photoUri
	* @param contactUri
	* @param displayName
	* @param isBusiness
	*/
	private void setPhoto(long photoId, Uri photoUri, Uri contactUri, String displayName,
	boolean isBusiness) {
	mContactPhoto.assignContactUri(contactUri);
	if (CompatUtils.isLollipopCompatible()) {
	mContactPhoto.setOverlay(null);
	}

	int contactType;
	if (isBusiness) {
	contactType = ContactPhotoManager.TYPE_BUSINESS;
	} else {
	contactType = ContactPhotoManager.TYPE_DEFAULT;
	}

	String lookupKey = null;
	if (contactUri != null) {
	lookupKey = UriUtils.getLookupKeyFromUri(contactUri);
	}

	ContactPhotoManager.DefaultImageRequest
	request = new ContactPhotoManager.DefaultImageRequest(
	displayName, lookupKey, contactType, true /* isCircular */);

	if (photoId == 0 && photoUri != null) {
	ContactPhotoManager.getInstance(this).loadPhoto(mContactPhoto, photoUri,
	mPhotoSize, false /* darkTheme /, true / isCircular */, request);
	} else {
	ContactPhotoManager.getInstance(this).loadThumbnail(mContactPhoto, photoId,
	false /* darkTheme /, true / isCircular */, request);
	}
	}

	/**
	* Loads the subject history from shared preferences.
	*
	* @param prefs Shared preferences.
	* @return List of subject history strings.
	*/
	public static List<String> loadSubjectHistory(SharedPreferences prefs) {
	int historySize = prefs.getInt(PREF_KEY_SUBJECT_HISTORY_COUNT, 0);
	List<String> subjects = new ArrayList(historySize);

	for (int ix = 0 ; ix < historySize; ix++) {
	String historyItem = prefs.getString(PREF_KEY_SUBJECT_HISTORY_ITEM + ix, null);
	if (!TextUtils.isEmpty(historyItem)) {
	subjects.add(historyItem);
	}
	}

	return subjects;
	}

	/**
	* Saves the subject history list to shared prefs, removing older items so that there are only
	* {@link #CALL_SUBJECT_HISTORY_SIZE} items at most.
	*
	* @param history The history.
	*/
	private void saveSubjectHistory(List<String> history) {
	// Remove oldest subject(s).
	while (history.size() > CALL_SUBJECT_HISTORY_SIZE) {
	history.remove(0);
	}

	SharedPreferences.Editor editor = mPrefs.edit();
	int historyCount = 0;
	for (String subject : history) {
	if (!TextUtils.isEmpty(subject)) {
	editor.putString(PREF_KEY_SUBJECT_HISTORY_ITEM + historyCount,
	subject);
	historyCount++;
	}
	}
	editor.putInt(PREF_KEY_SUBJECT_HISTORY_COUNT, historyCount);
	editor.apply();
	}

	/**
	* Hide software keyboard for the given {@link View}.
	*/
	public void hideSoftKeyboard(Context context, View view) {
	InputMethodManager imm = (InputMethodManager) context.getSystemService(
	Context.INPUT_METHOD_SERVICE);
	if (imm != null) {
	imm.hideSoftInputFromWindow(view.getWindowToken(), InputMethodManager.HIDE_NOT_ALWAYS);
	}
	}

	/**
	* Hides or shows the call history list.
	*
	* @param show {@code true} if the call history should be shown, {@code false} otherwise.
	*/
	private void showCallHistory(final boolean show) {
	// Bail early if the visibility has not changed.
	if ((show && mSubjectList.getVisibility() == View.VISIBLE) \|\|
	(!show && mSubjectList.getVisibility() == View.GONE)) {
	return;
	}

	final int dialogStartingBottom = mDialogView.getBottom();
	if (show) {
	// Showing the subject list; bind the list of history items to the list and show it.
	ArrayAdapter<String> adapter = new ArrayAdapter<String>(CallSubjectDialog.this,
	R.layout.call_subject_history_list_item, mSubjectHistory);
	mSubjectList.setAdapter(adapter);
	mSubjectList.setVisibility(View.VISIBLE);
	} else {
	// Hiding the subject list.
	mSubjectList.setVisibility(View.GONE);
	}

	// Use a ViewTreeObserver so that we can animate between the pre-layout and post-layout
	// states.
	final ViewTreeObserver observer = mBackgroundView.getViewTreeObserver();
	observer.addOnPreDrawListener(
	new ViewTreeObserver.OnPreDrawListener() {
	@Override
	public boolean onPreDraw() {
	// We don't want to continue getting called.
	if (observer.isAlive()) {
	observer.removeOnPreDrawListener(this);
	}

	// Determine the amount the dialog has shifted due to the relayout.
	int shiftAmount = dialogStartingBottom - mDialogView.getBottom();

	// If the dialog needs to be shifted, do that now.
	if (shiftAmount != 0) {
	// Start animation in translated state and animate to translationY 0.
	mDialogView.setTranslationY(shiftAmount);
	mDialogView.animate()
	.translationY(0)
	.setInterpolator(AnimUtils.EASE_OUT_EASE_IN)
	.setDuration(mAnimationDuration)
	.start();
	}

	if (show) {
	// Show the subhect list.
	mSubjectList.setTranslationY(mSubjectList.getHeight());

	mSubjectList.animate()
	.translationY(0)
	.setInterpolator(AnimUtils.EASE_OUT_EASE_IN)
	.setDuration(mAnimationDuration)
	.setListener(new AnimatorListenerAdapter() {
	@Override
	public void onAnimationEnd(Animator animation) {
	super.onAnimationEnd(animation);
	}

	@Override
	public void onAnimationStart(Animator animation) {
	super.onAnimationStart(animation);
	mSubjectList.setVisibility(View.VISIBLE);
	}
	})
	.start();
	} else {
	// Hide the subject list.
	mSubjectList.setTranslationY(0);

	mSubjectList.animate()
	.translationY(mSubjectList.getHeight())
	.setInterpolator(AnimUtils.EASE_OUT_EASE_IN)
	.setDuration(mAnimationDuration)
	.setListener(new AnimatorListenerAdapter() {
	@Override
	public void onAnimationEnd(Animator animation) {
	super.onAnimationEnd(animation);
	mSubjectList.setVisibility(View.GONE);
	}

	@Override
	public void onAnimationStart(Animator animation) {
	super.onAnimationStart(animation);
	}
	})
	.start();
	}
	return true;
	}
	}
	);
	}

	/**
	* Loads the message encoding and maximum message length from the phone account extras for the
	* current phone account.
	*/
	private void loadConfiguration() {
	// Only attempt to load configuration from the phone account extras if the SDK is N or
	// later. If we've got a prior SDK the default encoding and message length will suffice.
	int sdk = android.os.Build.VERSION.SDK_INT;
	if(sdk <= android.os.Build.VERSION_CODES.M) {
	return;
	}

	if (mPhoneAccountHandle == null) {
	return;
	}

	TelecomManager telecomManager =
	(TelecomManager) getSystemService(Context.TELECOM_SERVICE);
	final PhoneAccount account = telecomManager.getPhoneAccount(mPhoneAccountHandle);

	Bundle phoneAccountExtras = PhoneAccountSdkCompat.getExtras(account);
	if (phoneAccountExtras == null) {
	return;
	}

	// Get limit, if provided; otherwise default to existing value.
	mLimit = phoneAccountExtras
	.getInt(PhoneAccountSdkCompat.EXTRA_CALL_SUBJECT_MAX_LENGTH, mLimit);

	// Get charset; default to none (e.g. count characters 1:1).
	String charsetName = phoneAccountExtras.getString(
	PhoneAccountSdkCompat.EXTRA_CALL_SUBJECT_CHARACTER_ENCODING);

	if (!TextUtils.isEmpty(charsetName)) {
	try {
	mMessageEncoding = Charset.forName(charsetName);
	} catch (java.nio.charset.UnsupportedCharsetException uce) {
	// Character set was invalid; log warning and fallback to none.
	Log.w(TAG, "Invalid charset: " + charsetName);
	mMessageEncoding = null;
	}
	} else {
	// No character set specified, so count characters 1:1.
	mMessageEncoding = null;
	}
	}
	}