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/*
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* Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/**
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*
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* @ProjectName: $MiNotes$
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* @Package: $ui$
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* @ClassName: $AlarmAlertActivity.java$
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* @Description: 该类主要构建了一个闹铃提醒页面，以及用户不同选择的解决方案
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* @Author: 石兆羲
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* @CreateDate: $2023/12/21$
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*/
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package net.micode.notes.ui;
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import android.app.Activity;
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import android.app.AlertDialog;
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import android.content.Context;
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import android.content.DialogInterface;
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import android.content.DialogInterface.OnClickListener;
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import android.content.DialogInterface.OnDismissListener;
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import android.content.Intent;
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import android.media.AudioManager;
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import android.media.MediaPlayer;
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import android.media.RingtoneManager;
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import android.net.Uri;
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import android.os.Bundle;
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import android.os.PowerManager;
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import android.provider.Settings;
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import android.view.Window;
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import android.view.WindowManager;
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import net.micode.notes.R;
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import net.micode.notes.data.Notes;
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import net.micode.notes.tool.DataUtils;
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import java.io.IOException;
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public class AlarmAlertActivity extends Activity implements OnClickListener, OnDismissListener {
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private long mNoteId; //文本在数据库中存储的ID号
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private String mSnippet; //闹钟提示时出现的文本内容
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private static final int SNIPPET_PREW_MAX_LEN = 60;
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MediaPlayer mPlayer;
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@Override
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protected void onCreate(Bundle savedInstanceState) {
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//该部分的功能是：手机锁屏后，如果到了闹钟提示时间就点亮屏幕
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super.onCreate(savedInstanceState);
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//Bundle类型的数据与Map类型的数据相似，都是以key-value的形式存储数据的
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//saveInstanceState方法是用来保存Activity的状态的
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//能从onCreate的参数savedInsanceState中获得状态数据
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requestWindowFeature(Window.FEATURE_NO_TITLE); //界面显示“无标题“
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final Window win = getWindow();
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win.addFlags(WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED);
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if (!isScreenOn()) {
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win.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON
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//保持窗口点亮
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| WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON
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//点亮窗口
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| WindowManager.LayoutParams.FLAG_ALLOW_LOCK_WHILE_SCREEN_ON
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//允许在点亮窗口时锁屏
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| WindowManager.LayoutParams.FLAG_LAYOUT_INSET_DECOR);
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}
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Intent intent = getIntent();
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try {
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mNoteId = Long.valueOf(intent.getData().getPathSegments().get(1));
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mSnippet = DataUtils.getSnippetById(this.getContentResolver(), mNoteId);
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//根据ID从数据库中获取标签内容，其中getContentResolver（）是实现数据共享，实例存储。
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mSnippet = mSnippet.length() > SNIPPET_PREW_MAX_LEN ? mSnippet.substring(0,
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SNIPPET_PREW_MAX_LEN) + getResources().getString(R.string.notelist_string_info)
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: mSnippet;
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//判断标签片段是否达到符合长度
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} catch (IllegalArgumentException e) {
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e.printStackTrace();
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return;
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}
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//上述代码代码区如果有错误，就会返回所写异常的处理。
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mPlayer = new MediaPlayer();
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if (DataUtils.visibleInNoteDatabase(getContentResolver(), mNoteId, Notes.TYPE_NOTE)) {
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showActionDialog();
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//弹出对话框
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playAlarmSound();
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//播放闹钟提示音
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} else {
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finish();
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//结束闹钟操作
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}
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}
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private boolean isScreenOn() {
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//该部分功能是：判断屏幕是否锁屏，调用系统函数判断，返回值一个布尔类型值
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PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
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return pm.isScreenOn();
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}
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private void playAlarmSound() {
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//播放闹钟提示音
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Uri url = RingtoneManager.getActualDefaultRingtoneUri(this, RingtoneManager.TYPE_ALARM);
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//调用系统的铃声管理URI，得到闹钟提示音
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int silentModeStreams = Settings.System.getInt(getContentResolver(),
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Settings.System.MODE_RINGER_STREAMS_AFFECTED, 0);
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if ((silentModeStreams & (1 << AudioManager.STREAM_ALARM)) != 0) {
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//判断系统静音状态，如果静音则闹钟不响，否则响铃
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mPlayer.setAudioStreamType(silentModeStreams);
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} else {
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mPlayer.setAudioStreamType(AudioManager.STREAM_ALARM);
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}
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try {
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mPlayer.setDataSource(this, url);
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//该方法设置了多媒体数据来源，由前文的uri管理决定，该方法没有返回值
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mPlayer.prepare();
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//准备同步
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mPlayer.setLooping(true);
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//设置是否循环播放铃声
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mPlayer.start();
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//播放铃声
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} catch (IllegalArgumentException e) {
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// TODO Auto-generated catch block
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e.printStackTrace();
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} catch (SecurityException e) {
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// TODO Auto-generated catch block
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e.printStackTrace();
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//e.printStackTrace()函数功能是抛出异常， 还将显示出更深的调用信息
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//System.out.println(e)，这个方法打印出异常，并且输出在哪里出现的异常
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} catch (IllegalStateException e) {
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// TODO Auto-generated catch block
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e.printStackTrace();
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} catch (IOException e) {
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// TODO Auto-generated catch block
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e.printStackTrace();
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}
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}
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private void showActionDialog() {
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//该部分主要构建了一个响铃后的对话框，让用户决定是否关闭闹钟
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AlertDialog.Builder dialog = new AlertDialog.Builder(this);
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//AlertDialog的构造方法全部是Protected的
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//所以不能直接通过new一个AlertDialog来创建出一个AlertDialog。
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//要创建一个AlertDialog，就要用到AlertDialog.Builder中的create()方法
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//如这里的dialog就是新建了一个AlertDialog
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dialog.setTitle(R.string.app_name);
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//设置对话框标题
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dialog.setMessage(mSnippet);
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//设置对话框内容
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dialog.setPositiveButton(R.string.notealert_ok, this);
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//在对话框中设置“yes”按钮
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if (isScreenOn()) {
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dialog.setNegativeButton(R.string.notealert_enter, this);
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}//在对话框设置“No”按钮
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dialog.show().setOnDismissListener(this);
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}
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public void onClick(DialogInterface dialog, int which) {
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switch (which) {
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//用which来选择点击后的操作
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case DialogInterface.BUTTON_NEGATIVE:
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//如果点击了“No”按钮，就取消操作
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Intent intent = new Intent(this, NoteEditActivity.class);
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//类间数据传输
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intent.setAction(Intent.ACTION_VIEW);
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//设置动作属性
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intent.putExtra(Intent.EXTRA_UID, mNoteId);
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//实现key-value对，EXTRA_UID为key；mNoteId为键
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startActivity(intent);
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//开始执行动作
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break;
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default:
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//确定操作
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break;
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}
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}
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public void onDismiss(DialogInterface dialog) {
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//用户选择忽略闹钟的操作
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stopAlarmSound();
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//停止响铃
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finish();
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}
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private void stopAlarmSound() {
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//用户选择停止响铃
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if (mPlayer != null) {
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mPlayer.stop();
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//停止播放
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mPlayer.release();
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//释放多媒体对象MediaPlayer
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mPlayer = null;
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}
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}
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}
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