Java tutorial
/* * Copyright (C) 2016 The Nerdery, LLC * * 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.nerderylabs.android.nerdalert.ui.fragment; import com.nerderylabs.android.nerdalert.Constants; import com.nerderylabs.android.nerdalert.R; import com.nerderylabs.android.nerdalert.model.Neighbor; import com.nerderylabs.android.nerdalert.settings.Settings; import com.nerderylabs.android.nerdalert.ui.activity.NearbyInterface; import com.nerderylabs.android.nerdalert.ui.adapter.TabsPagerAdapter; import com.nerderylabs.android.nerdalert.ui.widget.NoSwipeViewPager; import com.nerderylabs.android.nerdalert.util.ProfileUtil; import android.Manifest; import android.content.Context; import android.content.Intent; import android.content.SharedPreferences; import android.content.pm.PackageManager; import android.graphics.Bitmap; import android.graphics.drawable.BitmapDrawable; import android.graphics.drawable.Drawable; import android.os.Bundle; import android.preference.PreferenceManager; import android.provider.ContactsContract; import android.support.annotation.Nullable; import android.support.design.widget.FloatingActionButton; import android.support.design.widget.TabLayout; import android.support.v4.app.Fragment; import android.support.v4.content.ContextCompat; import android.support.v4.graphics.drawable.DrawableCompat; import android.support.v4.util.Pair; import android.util.Log; import android.view.KeyEvent; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.view.animation.Animation; import android.view.animation.AnimationUtils; import android.view.inputmethod.EditorInfo; import android.widget.EditText; import android.widget.ImageView; import android.widget.TextView; public class MainFragment extends Fragment implements SharedPreferences.OnSharedPreferenceChangeListener { private static final String TAG = MainFragment.class.getSimpleName(); private View view; private NoSwipeViewPager viewPager; private FloatingActionButton fab; private NearbyInterface nearbyInterface; private final Neighbor myInfo = new Neighbor(); private Boolean isProgressIndicatorShowing = false; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // use a retained fragment to avoid re-publishing or re-subscribing upon orientation changes setRetainInstance(true); } @Nullable @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { view = inflater.inflate(R.layout.fragment_main, container, false); TabsPagerAdapter tabsPagerAdapter = new TabsPagerAdapter(getContext(), getActivity().getSupportFragmentManager()); viewPager = (NoSwipeViewPager) view.findViewById(R.id.viewpager); viewPager.setAdapter(tabsPagerAdapter); TabLayout tabs = (TabLayout) view.findViewById(R.id.tabs); tabs.setupWithViewPager(viewPager); // every time we load this fragment, prompt the user for READ_CONTACTS permission if we // don't already have it so we can load their profile data requestReadContactsPermission(); return view; } @Override public void onResume() { super.onResume(); restoreUserInformation(); initializeNametag(); initializeFab(); } public void restoreUserInformation() { Context context = getContext(); String name = Settings.getName(context); String tagline = Settings.getTagline(context); Pair<String, Bitmap> profile = loadPrivilegedProfileData(); if (name.isEmpty()) { name = profile.first; } myInfo.setName(name); if (tagline.isEmpty()) { tagline = ProfileUtil.getDeviceName(); } myInfo.setTagline(tagline); Bitmap photo = profile.second; if (photo != null) { myInfo.setBitmap(profile.second); } } private void requestReadContactsPermission() { int permission = ContextCompat.checkSelfPermission(getContext(), Manifest.permission.READ_CONTACTS); if (permission != PackageManager.PERMISSION_GRANTED) { Log.w(TAG, "Requesting READ_CONTACTS permission from user"); requestPermissions(new String[] { Manifest.permission.READ_CONTACTS }, Constants.REQUEST_ASK_PERMISSIONS); } } private Pair<String, Bitmap> loadPrivilegedProfileData() { // check to see if we have the necessary permissions in the new M permission model int permission = ContextCompat.checkSelfPermission(getContext(), Manifest.permission.READ_CONTACTS); if (permission == PackageManager.PERMISSION_GRANTED) { Log.d(TAG, "READ_CONTACTS permission granted. Retrieving user profile..."); return ProfileUtil.getUserProfile(getContext()); } else { Log.w(TAG, "READ_CONTACTS permission not granted. User profile unavailable."); return new Pair<>(null, null); } } private void initializeNametag() { final EditText nameEditText = (EditText) view.findViewById(R.id.my_name); final EditText taglineEditText = (EditText) view.findViewById(R.id.my_tagline); final ImageView photoImageView = (ImageView) view.findViewById(R.id.my_photo); // restore state nameEditText.setText(myInfo.getName()); taglineEditText.setText(myInfo.getTagline()); if (myInfo.getBitmap() != null) { photoImageView.setImageDrawable(new BitmapDrawable(getResources(), myInfo.getBitmap())); } else { Drawable photo = ContextCompat.getDrawable(getContext(), R.drawable.ic_contact_photo); DrawableCompat.setTint(photo, ContextCompat.getColor(getContext(), R.color.color_nametag)); photoImageView.setImageDrawable(photo); } // listen for focus change View.OnFocusChangeListener focusListener = new View.OnFocusChangeListener() { @Override public void onFocusChange(View v, boolean hasFocus) { if (!hasFocus) { persistNametagValues((TextView) v); } } }; // listen for the done key EditText.OnEditorActionListener doneListener = new EditText.OnEditorActionListener() { @Override public boolean onEditorAction(TextView v, int actionId, KeyEvent event) { if (actionId == EditorInfo.IME_ACTION_DONE) { persistNametagValues(v); } return false; } }; // open profile contact card when user's photo is tapped ImageView.OnClickListener imageClickListener = new View.OnClickListener() { @Override public void onClick(View v) { Intent intent = new Intent(Intent.ACTION_EDIT); intent.setDataAndType(ContactsContract.Profile.CONTENT_URI, ContactsContract.Contacts.CONTENT_ITEM_TYPE); // In Android 4.0 (API version 14) and later, a problem in the contacts app causes // incorrect navigation.To work around this problem in Android 4.0.3 (API version // 15) and later, add the extended data key finishActivityOnSaveCompleted to the // intent, with a value of true. intent.putExtra("finishActivityOnSaveCompleted", true); startActivity(intent); } }; nameEditText.setOnEditorActionListener(doneListener); taglineEditText.setOnEditorActionListener(doneListener); nameEditText.setOnFocusChangeListener(focusListener); taglineEditText.setOnFocusChangeListener(focusListener); photoImageView.setOnClickListener(imageClickListener); } private void persistNametagValues(TextView view) { Context context = getContext(); // stop publishing if the info has changed if (Settings.isPublishing(context)) { nearbyInterface.unpublish(myInfo); nearbyInterface.unsubscribe(); } switch (view.getId()) { case R.id.my_name: myInfo.setName(view.getEditableText().toString()); Settings.setName(context, view.getEditableText().toString()); break; case R.id.my_tagline: myInfo.setTagline(view.getEditableText().toString()); Settings.setTagline(context, view.getEditableText().toString()); break; } Log.d(TAG, "myInfo: " + myInfo); } private void initializeFab() { fab = (FloatingActionButton) view.findViewById(R.id.fab); fab.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Context context = getContext(); if (Settings.isPublishing(context) || Settings.isSubscribing(context)) { nearbyInterface.unpublish(myInfo); nearbyInterface.unsubscribe(); } else { nearbyInterface.publish(myInfo); nearbyInterface.subscribe(); } } }); // first time through. we shouldn't be active unless something didn't shutdown correctly. Context context = getContext(); if (Settings.isPublishing(context) || Settings.isSubscribing(context)) { startProgressIndicator(); } else { stopProgressIndicator(); } } @Override public void onAttach(Context context) { super.onAttach(context); nearbyInterface = (NearbyInterface) getActivity(); } @Override public void onStart() { super.onStart(); PreferenceManager.getDefaultSharedPreferences(getContext()).registerOnSharedPreferenceChangeListener(this); } @Override public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) { Context context = getContext(); // we might not have a context yet if (context != null) { // update the UI to reflect our current Nearby state if (Settings.isSubscribing(context) || Settings.isPublishing(context)) { startProgressIndicator(); } else { stopProgressIndicator(); } } } // this should only be called by the OnSharedPreferenceChangeListener, to reflect the correct state private void startProgressIndicator() { if (!isProgressIndicatorShowing) { fab.setImageDrawable(ContextCompat.getDrawable(getContext(), R.drawable.progress_indicator)); Animation rotate = AnimationUtils.loadAnimation(getContext(), R.anim.rotate); rotate.setRepeatCount(Animation.INFINITE); fab.startAnimation(rotate); isProgressIndicatorShowing = true; } } // this should only be called by the OnSharedPreferenceChangeListener, to reflect the correct state private void stopProgressIndicator() { if (isProgressIndicatorShowing) { fab.setAnimation(null); fab.setImageDrawable(ContextCompat.getDrawable(getContext(), R.drawable.ic_nearby)); isProgressIndicatorShowing = false; } } }