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@ -39,21 +39,29 @@ import net.micode.notes.tool.DataUtils;
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import java.io.IOException;
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/**
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* 闹钟提醒活动类,继承自Activity,实现了OnClickListener和OnDismissListener接口。
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* 该活动用于在闹钟响起时显示提醒对话框,并播放默认的闹钟声音。
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*/
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public class AlarmAlertActivity extends Activity implements OnClickListener, OnDismissListener {
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private long mNoteId;
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private String mSnippet;
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private static final int SNIPPET_PREW_MAX_LEN = 60;
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MediaPlayer mPlayer;
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private long mNoteId; // 保存笔记的ID
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private String mSnippet; // 保存笔记的摘要
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private static final int SNIPPET_PREW_MAX_LEN = 60; // 笔记摘要的最大长度
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MediaPlayer mPlayer; // 用于播放闹钟声音的MediaPlayer实例
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/**
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* 创建活动时调用的方法。
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* @param savedInstanceState 保存的实例状态数据包
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*/
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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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requestWindowFeature(Window.FEATURE_NO_TITLE);
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requestWindowFeature(Window.FEATURE_NO_TITLE); // 请求无标题窗口
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final Window win = getWindow();
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win.addFlags(WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED);
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final Window win = getWindow(); // 获取当前窗口
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win.addFlags(WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED); // 设置窗口在锁屏时显示
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// 如果屏幕未点亮,则添加更多标志以保持屏幕点亮并允许在锁屏时操作
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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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@ -61,98 +69,123 @@ 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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Intent intent = getIntent();
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Intent intent = getIntent(); // 获取启动该活动的Intent
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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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mNoteId = Long.valueOf(intent.getData().getPathSegments().get(1)); // 从Intent中提取笔记ID
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mSnippet = DataUtils.getSnippetById(this.getContentResolver(), mNoteId); // 根据笔记ID获取摘要
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// 如果摘要长度超过最大限制,则截取前SNIPPET_PREW_MAX_LEN个字符并添加省略号
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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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e.printStackTrace();
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return;
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e.printStackTrace(); // 打印异常信息
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return; // 如果发生异常,则结束该方法
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}
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mPlayer = new MediaPlayer();
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mPlayer = new MediaPlayer(); // 创建MediaPlayer实例
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// 检查数据库中是否存在指定ID的笔记
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if (DataUtils.visibleInNoteDatabase(getContentResolver(), mNoteId, Notes.TYPE_NOTE)) {
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showActionDialog();
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playAlarmSound();
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showActionDialog(); // 显示操作对话框
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playAlarmSound(); // 播放闹钟声音
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} else {
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finish();
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finish(); // 如果笔记不存在,则结束该活动
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}
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}
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/**
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* 检查屏幕是否点亮。
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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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PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE); // 获取电源管理服务
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return pm.isScreenOn(); // 返回屏幕是否点亮的状态
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}
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/**
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* 播放闹钟声音的方法。
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*/
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private void playAlarmSound() {
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// 获取实际的默认闹钟铃声URI
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Uri url = RingtoneManager.getActualDefaultRingtoneUri(this, RingtoneManager.TYPE_ALARM);
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// 获取当前设置的静音模式影响的音频流类型
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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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// 如果静音模式影响了闹钟音频流,则设置MediaPlayer的音频流类型为silentModeStreams
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// 否则,设置为AudioManager.STREAM_ALARM
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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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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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mPlayer.setDataSource(this, url); // 设置MediaPlayer的数据源为闹钟铃声URI
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mPlayer.prepare(); // 准备MediaPlayer
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mPlayer.setLooping(true); // 设置MediaPlayer循环播放
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mPlayer.start(); // 开始播放闹钟声音
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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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e.printStackTrace(); // 打印异常信息
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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(); // 打印异常信息
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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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e.printStackTrace(); // 打印异常信息
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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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e.printStackTrace(); // 打印异常信息
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}
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}
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/**
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* 显示操作对话框的方法。
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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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AlertDialog.Builder dialog = new AlertDialog.Builder(this); // 创建AlertDialog.Builder实例
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dialog.setTitle(R.string.app_name); // 设置对话框标题为应用名称
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dialog.setMessage(mSnippet); // 设置对话框消息为笔记摘要
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dialog.setPositiveButton(R.string.notealert_ok, this); // 设置确定按钮及其监听器
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// 如果屏幕已点亮,则添加进入按钮及其监听器
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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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dialog.show().setOnDismissListener(this);
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dialog.show().setOnDismissListener(this); // 显示对话框并设置对话框消失监听器
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}
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/**
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* 实现OnClickListener接口的方法,处理对话框按钮点击事件。
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* @param dialog 触发点击事件的对话框
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* @param which 点击的按钮的ID
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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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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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Intent intent = new Intent(this, NoteEditActivity.class); // 创建Intent准备跳转到笔记编辑活动
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intent.setAction(Intent.ACTION_VIEW); // 设置Intent动作类型为ACTION_VIEW
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intent.putExtra(Intent.EXTRA_UID, mNoteId); // 添加笔记ID作为附加信息
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startActivity(intent); // 启动笔记编辑活动
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break;
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default:
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break;
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}
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}
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/**
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* 实现OnDismissListener接口的方法,处理对话框消失事件。
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* @param dialog 消失的对话框
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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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stopAlarmSound(); // 停止播放闹钟声音
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finish(); // 结束该活动
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}
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/**
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* 停止并释放MediaPlayer的方法。
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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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mPlayer.release();
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mPlayer = null;
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mPlayer.stop(); // 停止MediaPlayer播放
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mPlayer.release(); // 释放MediaPlayer资源
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mPlayer = null; // 将mPlayer置为null
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}
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}
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}
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