/* * 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; /** * 便签提醒活动页,负责在便签提醒时间到达时显示提醒对话框并播放闹钟声音 * 实现对话框按钮点击监听和对话框消失监听,处理用户操作 */ public class AlarmAlertActivity extends Activity implements OnClickListener, OnDismissListener { // 提醒的便签ID private long mNoteId; // 便签内容摘要(用于提醒对话框展示) private String mSnippet; // 摘要最大显示长度(超出部分用省略号处理) private static final int SNIPPET_PREW_MAX_LEN = 60; // 媒体播放器,用于播放闹钟声音 MediaPlayer mPlayer; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // 去除标题栏 requestWindowFeature(Window.FEATURE_NO_TITLE); final Window win = getWindow(); // 允许在锁屏时显示窗口 win.addFlags(WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED); // 如果屏幕处于关闭状态,添加额外窗口标志:保持屏幕常亮、点亮屏幕、允许锁屏时显示、布局适配 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); } // 获取启动当前Activity的Intent(由AlarmReceiver传递) Intent intent = getIntent(); try { // 从Intent的Data中解析便签ID(Data格式为content://.../notes/{id},取路径的第2段) mNoteId = Long.valueOf(intent.getData().getPathSegments().get(1)); // 通过便签ID获取内容摘要(用于提醒展示) mSnippet = DataUtils.getSnippetById(this.getContentResolver(), mNoteId); // 处理摘要长度:超过最大长度时截断并添加省略提示 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; } // 初始化媒体播放器 mPlayer = new MediaPlayer(); // 检查便签是否存在且可见(未被删除) if (DataUtils.visibleInNoteDatabase(getContentResolver(), mNoteId, Notes.TYPE_NOTE)) { // 显示提醒对话框 showActionDialog(); // 播放闹钟声音 playAlarmSound(); } else { // 便签不存在则直接结束活动 finish(); } } /** * 判断屏幕是否处于亮屏状态 * @return 屏幕亮着返回true,否则返回false */ private boolean isScreenOn() { PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE); return pm.isScreenOn(); } /** * 播放系统默认闹钟铃声,设置为循环播放 */ private void playAlarmSound() { // 获取系统默认闹钟铃声的Uri Uri url = RingtoneManager.getActualDefaultRingtoneUri(this, RingtoneManager.TYPE_ALARM); // 获取系统静音模式影响的音频流(判断闹钟是否被静音) int silentModeStreams = Settings.System.getInt(getContentResolver(), Settings.System.MODE_RINGER_STREAMS_AFFECTED, 0); // 设置媒体播放器的音频流类型:若闹钟流被静音模式影响,则使用该流;否则默认使用闹钟流 if ((silentModeStreams & (1 << AudioManager.STREAM_ALARM)) != 0) { mPlayer.setAudioStreamType(silentModeStreams); } else { mPlayer.setAudioStreamType(AudioManager.STREAM_ALARM); } try { // 设置铃声数据源并准备播放 mPlayer.setDataSource(this, url); mPlayer.prepare(); // 设置为循环播放(直到用户操作停止) mPlayer.setLooping(true); mPlayer.start(); } catch (IllegalArgumentException | SecurityException | IllegalStateException | IOException e) { e.printStackTrace(); } } /** * 显示提醒对话框,展示便签摘要,提供操作按钮 */ private void showActionDialog() { AlertDialog.Builder dialog = new AlertDialog.Builder(this); // 设置对话框标题为应用名称(小米便签) dialog.setTitle(R.string.app_name); // 显示便签摘要内容 dialog.setMessage(mSnippet); // 确定按钮:关闭提醒(默认行为) dialog.setPositiveButton(R.string.notealert_ok, this); // 若屏幕亮着,添加“进入”按钮(跳转到便签编辑页) if (isScreenOn()) { dialog.setNegativeButton(R.string.notealert_enter, this); } // 显示对话框,并设置消失监听(用于停止铃声) dialog.show().setOnDismissListener(this); } /** * 处理对话框按钮点击事件 * @param dialog 对话框实例 * @param which 点击的按钮标识(BUTTON_POSITIVE/BUTTON_NEGATIVE) */ public void onClick(DialogInterface dialog, int which) { switch (which) { // 点击“进入”按钮:跳转到便签编辑页查看完整内容 case DialogInterface.BUTTON_NEGATIVE: Intent intent = new Intent(this, NoteEditActivity.class); intent.setAction(Intent.ACTION_VIEW); // 动作:查看便签 intent.putExtra(Intent.EXTRA_UID, mNoteId); // 传递便签ID startActivity(intent); break; // 点击“确定”按钮:默认不做额外操作,对话框消失后会停止铃声并结束活动 default: break; } } /** * 对话框消失时触发:停止铃声并结束活动 * @param dialog 对话框实例 */ public void onDismiss(DialogInterface dialog) { stopAlarmSound(); finish(); } /** * 停止闹钟铃声并释放媒体播放器资源 */ private void stopAlarmSound() { if (mPlayer != null) { mPlayer.stop(); // 停止播放 mPlayer.release(); // 释放资源 mPlayer = null; } } }