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@ -41,9 +41,24 @@ import java.io.IOException;
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public class AlarmAlertActivity extends Activity implements OnClickListener, OnDismissListener {
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/**
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* 当前笔记的 ID
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*/
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private long mNoteId;
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/**
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* 笔记摘录,用于在对话框中显示当前笔记的内容
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*/
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private String mSnippet;
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/**
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* 笔记摘录预览的最大长度
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*/
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private static final int SNIPPET_PREW_MAX_LEN = 60;
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/**
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* 媒体播放器,用于播放提醒音
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*/
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MediaPlayer mPlayer;
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@Override
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@ -51,9 +66,11 @@ public class AlarmAlertActivity extends Activity implements OnClickListener, OnD
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super.onCreate(savedInstanceState);
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requestWindowFeature(Window.FEATURE_NO_TITLE);
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// 将 Activity 显示在锁屏界面上
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final Window win = getWindow();
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win.addFlags(WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED);
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// 如果屏幕还未点亮,保持屏幕常亮并将屏幕点亮
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if (!isScreenOn()) {
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win.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON
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| WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON
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@ -61,19 +78,23 @@ public class AlarmAlertActivity extends Activity implements OnClickListener, OnD
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| WindowManager.LayoutParams.FLAG_LAYOUT_INSET_DECOR);
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}
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// 获取 intent 中传递的笔记 ID,并根据 ID 获取笔记摘录
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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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// 将笔记摘录截取到预设的最大长度,并添加省略号
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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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// 如果 intent 中未传递有效的笔记 ID,则打印异常并退出 Activity
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e.printStackTrace();
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return;
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}
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// 创建媒体播放器,并在数据库中找到当前笔记,如果存在则显示提醒对话框并播放提醒音
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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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@ -83,56 +104,82 @@ public class AlarmAlertActivity extends Activity implements OnClickListener, OnD
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}
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}
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/**
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* 判断屏幕是否点亮
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*
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* @return 如果屏幕点亮则返回 true,否则返回 false
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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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return pm.isScreenOn();
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}
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/**
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* 播放提醒音
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*/
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private void playAlarmSound() {
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// 获取默认的闹钟铃声 Uri
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Uri url = RingtoneManager.getActualDefaultRingtoneUri(this, RingtoneManager.TYPE_ALARM);
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// 获取静音模式下允许播放的音频流类型
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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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// 根据静音模式设置媒体播放器的音频流类型
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if ((silentModeStreams & (1 << AudioManager.STREAM_ALARM)) != 0) {
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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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// 设置媒体播放器的数据源,并开始播放
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try {
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mPlayer.setDataSource(this, url);
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mPlayer.prepare();
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mPlayer.setLooping(true);
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mPlayer.start();
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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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} 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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/**
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* 显示提醒对话框
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*/
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private void showActionDialog() {
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// 构建对话框,并设置标题、内容和两个按钮(确认和进入)
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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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// 如果屏幕点亮,则添加“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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// 显示对话框,并设置对话框关闭时的监听器
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dialog.show().setOnDismissListener(this);
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}
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/**
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* 处理对话框按钮的点击事件
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*
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* @param dialog 点击的对话框
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* @param which 点击的按钮类型(确定或取消)
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*/
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public void onClick(DialogInterface dialog, int which) {
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// 根据不同的按钮类型执行不同的操作
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switch (which) {
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case DialogInterface.BUTTON_NEGATIVE:
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// 如果点击了“进入”按钮,则打开笔记编辑界面并查看当前笔记
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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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@ -143,16 +190,28 @@ public class AlarmAlertActivity extends Activity implements OnClickListener, OnD
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}
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}
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/**
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* 对话框关闭时的回调方法
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*
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* @param dialog 对话框
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*/
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public void onDismiss(DialogInterface dialog) {
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// 停止播放提醒音并关闭 Activity
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stopAlarmSound();
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finish();
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}
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/**
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* 停止播放提醒音
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*/
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private void stopAlarmSound() {
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// 如果媒体播放器不为 null,则停止播放并释放资源
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if (mPlayer != null) {
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mPlayer.stop();
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mPlayer.release();
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mPlayer = null;
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}
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}
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}
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