diff --git a/src/AlarmAlertActivity.java b/src/AlarmAlertActivity.java new file mode 100644 index 0000000..3c77e81 --- /dev/null +++ b/src/AlarmAlertActivity.java @@ -0,0 +1,196 @@ +/* + * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net) + * + * 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 net.micode.notes.ui; + +import android.app.Activity; +import android.app.AlertDialog; +import android.content.Context; +import android.content.DialogInterface; +import android.content.DialogInterface.OnClickListener; +import android.content.DialogInterface.OnDismissListener; +import android.content.Intent; +import android.media.AudioManager; +import android.media.MediaPlayer; +import android.media.RingtoneManager; +import android.net.Uri; +import android.os.Bundle; +import android.os.PowerManager; +import android.provider.Settings; +import android.view.Window; +import android.view.WindowManager; + +import net.micode.notes.R; +import net.micode.notes.data.Notes; +import net.micode.notes.tool.DataUtils; + +import java.io.IOException; + + +/* + * AlarmAlertActivity 类用于处理提醒通知的界面和声音播放。 + * 当一个笔记的提醒时间到达时，这个活动会被启动，显示提醒信息并播放提醒声音。 + */ +public class AlarmAlertActivity extends Activity implements OnClickListener, OnDismissListener { + // 笔记的ID + private long mNoteId; + // 笔记内容的简短预览 + private String mSnippet; + // 预览文本的最大长度 + private static final int SNIPPET_PREW_MAX_LEN = 60; + // 用于播放提醒声音的MediaPlayer对象 + MediaPlayer mPlayer; + + /* + * onCreate 方法初始化活动，设置窗口特性，根据传入的Intent获取笔记ID和简短内容， + * 并根据情况显示对话框和播放声音。 + */ + @Override + protected void onCreate(Bundle savedInstanceState) { + super.onCreate(savedInstanceState); + // 请求无标题的窗口 + requestWindowFeature(Window.FEATURE_NO_TITLE); + + // 设置窗口在锁屏时也显示，并根据屏幕状态决定是否保持唤醒 + final Window win = getWindow(); + win.addFlags(WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED); + if (!isScreenOn()) { + win.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON + | WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON + | WindowManager.LayoutParams.FLAG_ALLOW_LOCK_WHILE_SCREEN_ON + | WindowManager.LayoutParams.FLAG_LAYOUT_INSET_DECOR); + } + + // 从Intent中获取笔记ID和简短内容 + Intent intent = getIntent(); + try { + mNoteId = Long.valueOf(intent.getData().getPathSegments().get(1)); + mSnippet = DataUtils.getSnippetById(this.getContentResolver(), mNoteId); + mSnippet = mSnippet.length() > SNIPPET_PREW_MAX_LEN ? mSnippet.substring(0, + SNIPPET_PREW_MAX_LEN) + getResources().getString(R.string.notelist_string_info) + : mSnippet; + } catch (IllegalArgumentException e) { + e.printStackTrace(); + return; + } + + // 如果笔记在数据库中可见，则显示动作对话框并播放声音，否则结束活动 + mPlayer = new MediaPlayer(); + if (DataUtils.visibleInNoteDatabase(getContentResolver(), mNoteId, Notes.TYPE_NOTE)) { + showActionDialog(); + playAlarmSound(); + } else { + finish(); + } + } + + /* + * 检查屏幕是否处于打开状态。 + * + * @return 如果屏幕已打开则返回true，否则返回false。 + */ + private boolean isScreenOn() { + PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE); + return pm.isScreenOn(); + } + + /* + * 播放提醒声音。 + * 根据系统设置选择合适的音频流类型，并尝试播放选定的报警声音。 + */ + private void playAlarmSound() { + Uri url = RingtoneManager.getActualDefaultRingtoneUri(this, RingtoneManager.TYPE_ALARM); + + // 检查是否在静音模式下影响报警声音 + int silentModeStreams = Settings.System.getInt(getContentResolver(), + Settings.System.MODE_RINGER_STREAMS_AFFECTED, 0); + + if ((silentModeStreams & (1 << AudioManager.STREAM_ALARM)) != 0) { + mPlayer.setAudioStreamType(silentModeStreams); + } else { + mPlayer.setAudioStreamType(AudioManager.STREAM_ALARM); + } + try { + mPlayer.setDataSource(this, url); + mPlayer.prepare(); + mPlayer.setLooping(true); + mPlayer.start(); + } catch (IllegalArgumentException e) { + e.printStackTrace(); + } catch (SecurityException e) { + e.printStackTrace(); + } catch (IllegalStateException e) { + e.printStackTrace(); + } catch (IOException e) { + e.printStackTrace(); + } + } + + /* + * 显示动作对话框。 + * 根据屏幕是否打开，设置对话框的按钮，并显示应用名称和笔记的简短内容。 + */ + private void showActionDialog() { + AlertDialog.Builder dialog = new AlertDialog.Builder(this); + dialog.setTitle(R.string.app_name); + dialog.setMessage(mSnippet); + dialog.setPositiveButton(R.string.notealert_ok, this); + if (isScreenOn()) { + dialog.setNegativeButton(R.string.notealert_enter, this); + } + dialog.show().setOnDismissListener(this); + } + + /* + * 点击对话框按钮的响应处理。 + * 根据点击的按钮启动编辑笔记的活动或结束当前活动。 + */ + public void onClick(DialogInterface dialog, int which) { + switch (which) { + case DialogInterface.BUTTON_NEGATIVE: + // 如果点击的是“进入”按钮，则启动笔记编辑活动 + Intent intent = new Intent(this, NoteEditActivity.class); + intent.setAction(Intent.ACTION_VIEW); + intent.putExtra(Intent.EXTRA_UID, mNoteId); + startActivity(intent); + break; + default: + // 关闭活动 + break; + } + } + + /* + * 对话框关闭时的处理。 + * 停止播放提醒声音，结束当前活动。 + */ + public void onDismiss(DialogInterface dialog) { + stopAlarmSound(); + finish(); + } + + /* + * 停止播放提醒声音。 + * 如果MediaPlayer对象不为空，则停止播放并释放资源。 + */ + private void stopAlarmSound() { + if (mPlayer != null) { + mPlayer.stop(); + mPlayer.release(); + mPlayer = null; + } + } +}