xiaominote_code_analysis/src%2FNotes-master%2FNotes-master%2Fsrc%2Fnet%2Fmicode%2Fnotes%2Fui/AlarmAlertActivity.java

/*
 * 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;
 
 
 public class AlarmAlertActivity extends Activity implements OnClickListener, OnDismissListener {
     private long mNoteId;
     private String mSnippet;
     private static final int SNIPPET_PREW_MAX_LEN = 60;
     MediaPlayer mPlayer;
 
     @Override
      /**
       * @Method      onCreate
       * @Date        2024/12/13 8:15
       * @param savedInstanceState
       * @Author      mazilin
       * @Return      void
       * @Description
       */
     protected void onCreate(Bundle savedInstanceState) {
         /**
           * Bundel 类似于 map，key-value存储
           * super 代表父类, 调用 onCreate 用于恢复上次结束的状态
           * mazilin 2024/12/13 8:39
         */
         super.onCreate(savedInstanceState);
         requestWindowFeature(Window.FEATURE_NO_TITLE);
 
         final Window win = getWindow();
         // 在屏幕锁定时显示
         win.addFlags(WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED);
 
         // 锁屏时到闹钟提示时间后，点亮屏幕
         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);
         }
 
         Intent intent = getIntent();
 
         try {
             mNoteId = Long.valueOf(intent.getData().getPathSegments().get(1));
             mSnippet = DataUtils.getSnippetById(this.getContentResolver(), mNoteId);
             // 超出长度则变为 substr + "..."
             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;
         }
 
         mPlayer = new MediaPlayer();
         // 查找数据库中有没有 mNoteId 的便签, 如果有则激发对话框 + 闹钟提示音
         if (DataUtils.visibleInNoteDatabase(getContentResolver(), mNoteId, Notes.TYPE_NOTE)) {
             showActionDialog();
             playAlarmSound();
         } else {
             finish();
         }
     }
 
     private boolean isScreenOn() {
         PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
         return pm.isScreenOn();
     }
 
     private void playAlarmSound() {
         Uri url = RingtoneManager.getActualDefaultRingtoneUri(this, RingtoneManager.TYPE_ALARM);
 
         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) {
             // TODO Auto-generated catch block
             e.printStackTrace();
         } catch (SecurityException e) {
             // TODO Auto-generated catch block
             e.printStackTrace();
         } catch (IllegalStateException e) {
             // TODO Auto-generated catch block
             e.printStackTrace();
         } catch (IOException e) {
             // TODO Auto-generated catch block
             e.printStackTrace();
         }
     }
 
     private void showActionDialog() {// TODO: 2024/1/2 可以模仿这个，写一个xxx条件下弹出来的Dialog 
         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);
     }
 
     public void onClick(DialogInterface dialog, int which) {
         switch (which) {
             case DialogInterface.BUTTON_NEGATIVE:
                 Intent intent = new Intent(this, NoteEditActivity.class);
                 intent.setAction(Intent.ACTION_VIEW);
                 intent.putExtra(Intent.EXTRA_UID, mNoteId);
                 startActivity(intent);
                 break;
             default:
                 break;
         }
     }
 
     public void onDismiss(DialogInterface dialog) {
         stopAlarmSound();
         finish();
     }
 
     private void stopAlarmSound() {
         if (mPlayer != null) {
             mPlayer.stop();
             mPlayer.release();
             mPlayer = null;
         }
     }
 }