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.usbtuner.setup; import android.app.Fragment; import android.app.FragmentManager; import android.app.Notification; import android.app.NotificationManager; import android.app.PendingIntent; import android.content.ComponentName; import android.content.Context; import android.content.Intent; import android.content.res.Resources; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.media.tv.TvContract; import android.os.Bundle; import android.support.v4.app.NotificationCompat; import android.view.KeyEvent; import com.android.tv.common.TvCommonConstants; import com.android.tv.common.TvCommonUtils; import com.android.tv.common.ui.setup.SetupActivity; import com.android.tv.common.ui.setup.SetupFragment; import com.android.tv.common.ui.setup.SetupMultiPaneFragment; import com.android.usbtuner.R; import com.android.usbtuner.UsbTunerPreferences; import com.android.usbtuner.tvinput.UsbTunerTvInputService; /** * An activity that serves USB tuner setup process. */ public class TunerSetupActivity extends SetupActivity { // For the recommendation card private static final String TV_ACTIVITY_CLASS_NAME = "com.android.tv.TvActivity"; private static final String NOTIFY_TAG = "UsbTunerSetup"; private static final int NOTIFY_ID = 1000; private static final String TAG_DRAWABLE = "drawable"; private static final String TAG_ICON = "ic_launcher_s"; private static final int CHANNEL_MAP_SCAN_FILE[] = { R.raw.ut_us_atsc_center_frequencies_8vsb, R.raw.ut_us_cable_standard_center_frequencies_qam256, R.raw.ut_us_all, R.raw.ut_kr_atsc_center_frequencies_8vsb, R.raw.ut_kr_cable_standard_center_frequencies_qam256, R.raw.ut_kr_all, R.raw.ut_kr_dev_cj_cable_center_frequencies_qam256 }; private ScanFragment mLastScanFragment; @Override protected Fragment onCreateInitialFragment() { SetupFragment fragment = new WelcomeFragment(); fragment.setShortDistance( SetupFragment.FRAGMENT_EXIT_TRANSITION | SetupFragment.FRAGMENT_REENTER_TRANSITION); return fragment; } @Override protected void executeAction(String category, int actionId) { switch (category) { case WelcomeFragment.ACTION_CATEGORY: switch (actionId) { case SetupMultiPaneFragment.ACTION_DONE: // If the scan was performed, then the result should be OK. setResult(mLastScanFragment == null ? RESULT_CANCELED : RESULT_OK); finish(); break; default: { SetupFragment fragment = new ConnectionTypeFragment(); fragment.setShortDistance( SetupFragment.FRAGMENT_ENTER_TRANSITION | SetupFragment.FRAGMENT_RETURN_TRANSITION); showFragment(fragment, true); break; } } break; case ConnectionTypeFragment.ACTION_CATEGORY: mLastScanFragment = new ScanFragment(); Bundle args = new Bundle(); args.putInt(ScanFragment.EXTRA_FOR_CHANNEL_SCAN_FILE, CHANNEL_MAP_SCAN_FILE[actionId]); mLastScanFragment.setArguments(args); showFragment(mLastScanFragment, true); break; case ScanFragment.ACTION_CATEGORY: switch (actionId) { case ScanFragment.ACTION_CANCEL: getFragmentManager().popBackStack(); break; case ScanFragment.ACTION_FINISH: SetupFragment fragment = new ScanResultFragment(); fragment.setShortDistance( SetupFragment.FRAGMENT_EXIT_TRANSITION | SetupFragment.FRAGMENT_REENTER_TRANSITION); showFragment(fragment, true); break; } break; case ScanResultFragment.ACTION_CATEGORY: switch (actionId) { case SetupMultiPaneFragment.ACTION_DONE: setResult(RESULT_OK); finish(); break; default: SetupFragment fragment = new ConnectionTypeFragment(); fragment.setShortDistance( SetupFragment.FRAGMENT_ENTER_TRANSITION | SetupFragment.FRAGMENT_RETURN_TRANSITION); showFragment(fragment, true); break; } break; } } @Override public boolean onKeyUp(int keyCode, KeyEvent event) { if (keyCode == KeyEvent.KEYCODE_BACK) { FragmentManager manager = getFragmentManager(); int count = manager.getBackStackEntryCount(); if (count > 0) { String lastTag = manager.getBackStackEntryAt(count - 1).getName(); if (ScanResultFragment.class.getCanonicalName().equals(lastTag) && count >= 2) { // Pops fragment including ScanFragment. manager.popBackStack(manager.getBackStackEntryAt(count - 2).getName(), FragmentManager.POP_BACK_STACK_INCLUSIVE); return true; } else if (ScanFragment.class.getCanonicalName().equals(lastTag)) { mLastScanFragment.finishScan(true); return true; } } } return super.onKeyUp(keyCode, event); } /** * A callback to be invoked when the TvInputService is enabled or disabled. * * @param context a {@link Context} instance * @param enabled {@code true} for the {@link UsbTunerTvInputService} to be enabled; * otherwise {@code false} */ public static void onTvInputEnabled(Context context, boolean enabled) { // Send a recommendation card for USB channel tuner setup // if there's no channels and the USB tuner TV input setup has been not done. boolean channelScanDoneOnPreference = UsbTunerPreferences.isScanDone(context); int channelCountOnPreference = UsbTunerPreferences.getScannedChannelCount(context); if (enabled && !channelScanDoneOnPreference && channelCountOnPreference == 0) { UsbTunerPreferences.setShouldShowSetupActivity(context, true); sendRecommendationCard(context); } else { UsbTunerPreferences.setShouldShowSetupActivity(context, false); cancelRecommendationCard(context); } } /** * Returns a {@link Intent} to launch the USB tuner TV input service. * * @param context a {@link Context} instance */ public static Intent createSetupActivity(Context context) { String inputId = TvContract .buildInputId(new ComponentName(context.getPackageName(), UsbTunerTvInputService.class.getName())); // Make an intent to launch the setup activity of USB tuner TV input. Intent intent = TvCommonUtils.createSetupIntent(new Intent(context, TunerSetupActivity.class), inputId); intent.putExtra(TvCommonConstants.EXTRA_INPUT_ID, inputId); Intent tvActivityIntent = new Intent(); tvActivityIntent.setComponent(new ComponentName(context, TV_ACTIVITY_CLASS_NAME)); intent.putExtra(TvCommonConstants.EXTRA_ACTIVITY_AFTER_COMPLETION, tvActivityIntent); return intent; } /** * Returns a {@link PendingIntent} to launch the USB tuner TV input service. * * @param context a {@link Context} instance */ private static PendingIntent createPendingIntentForSetupActivity(Context context) { return PendingIntent.getActivity(context, 0, createSetupActivity(context), PendingIntent.FLAG_UPDATE_CURRENT); } /** * Sends the recommendation card to start the USB tuner TV input setup activity. * * @param context a {@link Context} instance */ private static void sendRecommendationCard(Context context) { Resources resources = context.getResources(); String focusedTitle = resources.getString(R.string.ut_setup_recommendation_card_focused_title); String title = resources.getString(R.string.ut_setup_recommendation_card_title); Bitmap largeIcon = BitmapFactory.decodeResource(resources, R.drawable.recommendation_antenna); // Build and send the notification. Notification notification = new NotificationCompat.BigPictureStyle(new NotificationCompat.Builder(context) .setAutoCancel(false).setContentTitle(focusedTitle).setContentText(title).setContentInfo(title) .setCategory(Notification.CATEGORY_RECOMMENDATION).setLargeIcon(largeIcon) .setSmallIcon(resources.getIdentifier(TAG_ICON, TAG_DRAWABLE, context.getPackageName())) .setContentIntent(createPendingIntentForSetupActivity(context))).build(); NotificationManager notificationManager = (NotificationManager) context .getSystemService(Context.NOTIFICATION_SERVICE); notificationManager.notify(NOTIFY_TAG, NOTIFY_ID, notification); } /** * Cancels the previously shown recommendation card. * * @param context a {@link Context} instance */ public static void cancelRecommendationCard(Context context) { NotificationManager notificationManager = (NotificationManager) context .getSystemService(Context.NOTIFICATION_SERVICE); notificationManager.cancel(NOTIFY_TAG, NOTIFY_ID); } }