Java tutorial
/* * 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.messaging.ui.appsettings; import android.app.FragmentTransaction; import android.content.Intent; import android.content.SharedPreferences; import android.content.SharedPreferences.OnSharedPreferenceChangeListener; import android.media.Ringtone; import android.media.RingtoneManager; import android.net.Uri; import android.os.Bundle; import android.preference.Preference; import android.preference.PreferenceFragment; import android.preference.PreferenceScreen; import android.preference.RingtonePreference; import android.preference.TwoStatePreference; import android.provider.Settings; import android.support.v4.app.NavUtils; import android.text.TextUtils; import android.view.Menu; import android.view.MenuItem; import com.android.messaging.R; import com.android.messaging.ui.BugleActionBarActivity; import com.android.messaging.ui.LicenseActivity; import com.android.messaging.ui.UIIntents; import com.android.messaging.util.BuglePrefs; import com.android.messaging.util.DebugUtils; import com.android.messaging.util.OsUtil; import com.android.messaging.util.PhoneUtils; public class ApplicationSettingsActivity extends BugleActionBarActivity { @Override protected void onCreate(final Bundle savedInstanceState) { super.onCreate(savedInstanceState); getSupportActionBar().setDisplayHomeAsUpEnabled(true); final boolean topLevel = getIntent().getBooleanExtra(UIIntents.UI_INTENT_EXTRA_TOP_LEVEL_SETTINGS, false); if (topLevel) { getSupportActionBar().setTitle(getString(R.string.settings_activity_title)); } FragmentTransaction ft = getFragmentManager().beginTransaction(); ft.replace(android.R.id.content, new ApplicationSettingsFragment()); ft.commit(); } @Override public boolean onCreateOptionsMenu(Menu menu) { if (super.onCreateOptionsMenu(menu)) { return true; } getMenuInflater().inflate(R.menu.settings_menu, menu); return true; } @Override public boolean onOptionsItemSelected(final MenuItem item) { switch (item.getItemId()) { case android.R.id.home: NavUtils.navigateUpFromSameTask(this); return true; case R.id.action_license: final Intent intent = new Intent(this, LicenseActivity.class); startActivity(intent); return true; } return super.onOptionsItemSelected(item); } public static class ApplicationSettingsFragment extends PreferenceFragment implements OnSharedPreferenceChangeListener { private String mNotificationsEnabledPreferenceKey; private TwoStatePreference mNotificationsEnabledPreference; private String mRingtonePreferenceKey; private RingtonePreference mRingtonePreference; private Preference mVibratePreference; private String mSmsDisabledPrefKey; private Preference mSmsDisabledPreference; private String mSmsEnabledPrefKey; private Preference mSmsEnabledPreference; private boolean mIsSmsPreferenceClicked; public ApplicationSettingsFragment() { // Required empty constructor } @Override public void onCreate(final Bundle savedInstanceState) { super.onCreate(savedInstanceState); getPreferenceManager().setSharedPreferencesName(BuglePrefs.SHARED_PREFERENCES_NAME); addPreferencesFromResource(R.xml.preferences_application); mNotificationsEnabledPreferenceKey = getString(R.string.notifications_enabled_pref_key); mNotificationsEnabledPreference = (TwoStatePreference) findPreference( mNotificationsEnabledPreferenceKey); mRingtonePreferenceKey = getString(R.string.notification_sound_pref_key); mRingtonePreference = (RingtonePreference) findPreference(mRingtonePreferenceKey); mVibratePreference = findPreference(getString(R.string.notification_vibration_pref_key)); mSmsDisabledPrefKey = getString(R.string.sms_disabled_pref_key); mSmsDisabledPreference = findPreference(mSmsDisabledPrefKey); mSmsEnabledPrefKey = getString(R.string.sms_enabled_pref_key); mSmsEnabledPreference = findPreference(mSmsEnabledPrefKey); mIsSmsPreferenceClicked = false; final SharedPreferences prefs = getPreferenceScreen().getSharedPreferences(); updateSoundSummary(prefs); if (!DebugUtils.isDebugEnabled()) { final Preference debugCategory = findPreference(getString(R.string.debug_pref_key)); getPreferenceScreen().removePreference(debugCategory); } final PreferenceScreen advancedScreen = (PreferenceScreen) findPreference( getString(R.string.advanced_pref_key)); final boolean topLevel = getActivity().getIntent() .getBooleanExtra(UIIntents.UI_INTENT_EXTRA_TOP_LEVEL_SETTINGS, false); if (topLevel) { advancedScreen .setIntent(UIIntents.get().getAdvancedSettingsIntent(getPreferenceScreen().getContext())); } else { // Hide the Advanced settings screen if this is not top-level; these are shown at // the parent SettingsActivity. getPreferenceScreen().removePreference(advancedScreen); } } @Override public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference) { if (preference.getKey() == mSmsDisabledPrefKey || preference.getKey() == mSmsEnabledPrefKey) { mIsSmsPreferenceClicked = true; } return super.onPreferenceTreeClick(preferenceScreen, preference); } private void updateSoundSummary(final SharedPreferences sharedPreferences) { // The silent ringtone just returns an empty string String ringtoneName = mRingtonePreference.getContext().getString(R.string.silent_ringtone); String ringtoneString = sharedPreferences.getString(mRingtonePreferenceKey, null); // Bootstrap the default setting in the preferences so that we have a valid selection // in the dialog the first time that the user opens it. if (ringtoneString == null) { ringtoneString = Settings.System.DEFAULT_NOTIFICATION_URI.toString(); final SharedPreferences.Editor editor = sharedPreferences.edit(); editor.putString(mRingtonePreferenceKey, ringtoneString); editor.apply(); } if (!TextUtils.isEmpty(ringtoneString)) { final Uri ringtoneUri = Uri.parse(ringtoneString); final Ringtone tone = RingtoneManager.getRingtone(mRingtonePreference.getContext(), ringtoneUri); if (tone != null) { ringtoneName = tone.getTitle(mRingtonePreference.getContext()); } } mRingtonePreference.setSummary(ringtoneName); } private void updateSmsEnabledPreferences() { if (!OsUtil.isAtLeastKLP()) { getPreferenceScreen().removePreference(mSmsDisabledPreference); getPreferenceScreen().removePreference(mSmsEnabledPreference); } else { final String defaultSmsAppLabel = getString(R.string.default_sms_app, PhoneUtils.getDefault().getDefaultSmsAppLabel()); boolean isSmsEnabledBeforeState; boolean isSmsEnabledCurrentState; if (PhoneUtils.getDefault().isDefaultSmsApp()) { if (getPreferenceScreen().findPreference(mSmsEnabledPrefKey) == null) { getPreferenceScreen().addPreference(mSmsEnabledPreference); isSmsEnabledBeforeState = false; } else { isSmsEnabledBeforeState = true; } isSmsEnabledCurrentState = true; getPreferenceScreen().removePreference(mSmsDisabledPreference); mSmsEnabledPreference.setSummary(defaultSmsAppLabel); } else { if (getPreferenceScreen().findPreference(mSmsDisabledPrefKey) == null) { getPreferenceScreen().addPreference(mSmsDisabledPreference); isSmsEnabledBeforeState = true; } else { isSmsEnabledBeforeState = false; } isSmsEnabledCurrentState = false; getPreferenceScreen().removePreference(mSmsEnabledPreference); mSmsDisabledPreference.setSummary(defaultSmsAppLabel); } updateNotificationsPreferences(); } mIsSmsPreferenceClicked = false; } private void updateNotificationsPreferences() { final boolean canNotify = !OsUtil.isAtLeastKLP() || PhoneUtils.getDefault().isDefaultSmsApp(); mNotificationsEnabledPreference.setEnabled(canNotify); } @Override public void onStart() { super.onStart(); // We do this on start rather than on resume because the sound picker is in a // separate activity. getPreferenceScreen().getSharedPreferences().registerOnSharedPreferenceChangeListener(this); } @Override public void onResume() { super.onResume(); updateSmsEnabledPreferences(); updateNotificationsPreferences(); } @Override public void onSharedPreferenceChanged(final SharedPreferences sharedPreferences, final String key) { if (key.equals(mNotificationsEnabledPreferenceKey)) { updateNotificationsPreferences(); } else if (key.equals(mRingtonePreferenceKey)) { updateSoundSummary(sharedPreferences); } } @Override public void onStop() { super.onStop(); getPreferenceScreen().getSharedPreferences().unregisterOnSharedPreferenceChangeListener(this); } } }