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@ -38,21 +38,34 @@ 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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/**
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* 闹钟提醒Activity - 当便签的提醒时间到达时显示
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* 主要功能:
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* 1. 在锁屏状态下唤醒屏幕并显示提醒对话框
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* 2. 播放默认闹钟铃声
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* 3. 提供确认和进入便签编辑的操作选项
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*/
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public class AlarmAlertActivity extends Activity implements OnClickListener, OnDismissListener {
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// 便签ID和摘要信息
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private long mNoteId;
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// 摘要最大显示长度
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private String mSnippet;
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private static final int SNIPPET_PREW_MAX_LEN = 60;
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// 媒体播放器,用于播放闹钟声音
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MediaPlayer mPlayer;
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@Override
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protected void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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// 无标题栏
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requestWindowFeature(Window.FEATURE_NO_TITLE);
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final Window win = getWindow();
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// 关键标志:即使锁屏也显示Activity
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win.addFlags(WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED);
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// 如果屏幕处于关闭状态,自动点亮屏幕
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if (!isScreenOn()) {
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win.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON
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@ -60,36 +73,55 @@ public class AlarmAlertActivity extends Activity implements OnClickListener, OnD
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| WindowManager.LayoutParams.FLAG_ALLOW_LOCK_WHILE_SCREEN_ON
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| WindowManager.LayoutParams.FLAG_LAYOUT_INSET_DECOR);
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}
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// 从Intent中获取便签ID和内容
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Intent intent = getIntent();
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try {
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// 从URI路径中解析便签ID
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mNoteId = Long.valueOf(intent.getData().getPathSegments().get(1));
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// 获取便签内容并截取摘要
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mSnippet = DataUtils.getSnippetById(this.getContentResolver(), mNoteId);
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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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} catch (IllegalArgumentException e) {
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// 处理无效ID异常
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e.printStackTrace();
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return;
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}
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// 初始化媒体播放器并检查便签有效性
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mPlayer = new MediaPlayer();
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if (DataUtils.visibleInNoteDatabase(getContentResolver(), mNoteId, Notes.TYPE_NOTE)) {
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// 便签存在且有效,显示提醒对话框并播放闹钟
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showActionDialog();
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playAlarmSound();
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} else {
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// 便签不存在,直接关闭Activity
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finish();
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}
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}
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/**
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* 检查屏幕是否处于点亮状态
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*/
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private boolean isScreenOn() {
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PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
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// 注意:在Android 6.0及以上版本应使用isInteractive()方法
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return pm.isScreenOn();
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}
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/**
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* 播放闹钟声音
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* 处理逻辑:
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* 1. 获取系统默认闹钟铃声URI
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* 2. 根据系统设置决定使用的音频流
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* 3. 配置并启动MediaPlayer循环播放
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*/
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private void playAlarmSound() {
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// 获取默认闹钟铃声URI
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Uri url = RingtoneManager.getActualDefaultRingtoneUri(this, RingtoneManager.TYPE_ALARM);
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// 获取系统设置中受静音模式影响的音频流
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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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@ -100,10 +132,13 @@ public class AlarmAlertActivity extends Activity implements OnClickListener, OnD
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mPlayer.setAudioStreamType(AudioManager.STREAM_ALARM);
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}
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try {
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// 设置数据源并准备播放
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mPlayer.setDataSource(this, url);
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mPlayer.prepare();
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// 设置循环播放
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mPlayer.setLooping(true);
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mPlayer.start();
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// 统一处理各种异常
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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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@ -119,35 +154,58 @@ public class AlarmAlertActivity extends Activity implements OnClickListener, OnD
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}
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}
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/**
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* 显示提醒操作对话框
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* 包含:
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* - 便签摘要内容
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* - 确认按钮(关闭提醒)
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* - 进入按钮(如果屏幕已点亮,可直接进入便签编辑)
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*/
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private void showActionDialog() {
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AlertDialog.Builder dialog = new AlertDialog.Builder(this);
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dialog.setTitle(R.string.app_name);
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dialog.setMessage(mSnippet);
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dialog.setPositiveButton(R.string.notealert_ok, this);
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// 只有屏幕已点亮时才显示"进入"按钮
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if (isScreenOn()) {
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dialog.setNegativeButton(R.string.notealert_enter, this);
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}
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// 设置对话框关闭监听器并显示
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dialog.show().setOnDismissListener(this);
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}
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/**
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* 处理对话框按钮点击事件
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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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case DialogInterface.BUTTON_NEGATIVE:
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// 进入便签编辑界面
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Intent intent = new Intent(this, NoteEditActivity.class);
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intent.setAction(Intent.ACTION_VIEW);
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intent.putExtra(Intent.EXTRA_UID, mNoteId);
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startActivity(intent);
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break;
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default:
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// 默认处理(通常是确认按钮),在onDismiss中处理关闭逻辑
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break;
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}
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}
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/**
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* 对话框关闭时回调
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* 停止闹钟并关闭Activity
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*/
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public void onDismiss(DialogInterface dialog) {
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stopAlarmSound();
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finish();
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}
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/**
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* 停止闹钟声音播放并释放资源
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*/
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private void stopAlarmSound() {
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if (mPlayer != null) {
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mPlayer.stop();
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