diff --git a/java%2Fnet%2Fmicode%2Fnotes/AlarmAlertActivity.java b/java%2Fnet%2Fmicode%2Fnotes/AlarmAlertActivity.java new file mode 100644 index 0000000..f4ad11c --- /dev/null +++ b/java%2Fnet%2Fmicode%2Fnotes/AlarmAlertActivity.java @@ -0,0 +1,190 @@ +/* + * 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;//文本在数据库存储中的ID号 + private String mSnippet;//闹钟提示时出现的文本片段 + private static final int SNIPPET_PREW_MAX_LEN = 60; + MediaPlayer mPlayer; + + @Override + protected void onCreate(Bundle savedInstanceState) { + super.onCreate(savedInstanceState); + //Bundle类型的数据与Map类型的数据相似，都是以key-value的形式存储数据的 + //onsaveInstanceState方法是用来保存Activity的状态的 + //能从onCreate的参数savedInsanceState中获得状态数据 + requestWindowFeature(Window.FEATURE_NO_TITLE); + //界面显示——无标题 + + final Window win = getWindow(); + win.addFlags(WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED); + + if (!isScreenOn()) { + win.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON//保持窗体点亮 + | WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON//将窗体点亮 + | WindowManager.LayoutParams.FLAG_ALLOW_LOCK_WHILE_SCREEN_ON//允许窗体点亮时锁屏 + | WindowManager.LayoutParams.FLAG_LAYOUT_INSET_DECOR); + }//在手机锁屏后如果到了闹钟提示时间，点亮屏幕 + + Intent intent = getIntent(); + + try { + mNoteId = Long.valueOf(intent.getData().getPathSegments().get(1)); + mSnippet = DataUtils.getSnippetById(this.getContentResolver(), mNoteId); + //根据ID从数据库中获取标签的内容； + //getContentResolver（）是实现数据共享，实例存储。 + mSnippet = mSnippet.length() > SNIPPET_PREW_MAX_LEN ? mSnippet.substring(0, + SNIPPET_PREW_MAX_LEN) + getResources().getString(R.string.notelist_string_info) + : mSnippet; + //判断标签片段是否达到符合长度 + } catch (IllegalArgumentException e) { + e.printStackTrace(); + return; + } + /* + try + { + // 代码区 + } + catch(Exception e) + { + // 异常处理 + } + 代码区如果有错误，就会返回所写异常的处理。*/ + + mPlayer = new MediaPlayer(); + if (DataUtils.visibleInNoteDatabase(getContentResolver(), mNoteId, Notes.TYPE_NOTE)) { + showActionDialog();//弹出对话框 + playAlarmSound();//闹钟提示音激发 + } else { + finish();//完成闹钟动作 + } + } + + private boolean isScreenOn() { + //判断屏幕是否锁屏，调用系统函数判断，最后返回值是布尔类型 + PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE); + return pm.isScreenOn(); + } + + private void playAlarmSound() { + //闹钟提示音激发 + Uri url = RingtoneManager.getActualDefaultRingtoneUri(this, RingtoneManager.TYPE_ALARM); + //调用系统的铃声管理URI，得到闹钟提示音 + 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);//方法：setDataSource(Context context, Uri uri) + //解释：无返回值，设置多媒体数据来源【根据 Uri】 + mPlayer.prepare();//准备同步 + mPlayer.setLooping(true);//设置是否循环播放 + mPlayer.start();//开始播放 + } catch (IllegalArgumentException e) { + // TODO Auto-generated catch block + e.printStackTrace(); + //e.printStackTrace()函数功能是抛出异常， 还将显示出更深的调用信息 + //System.out.println(e)，这个方法打印出异常，并且输出在哪里出现的异常 + } 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() { + AlertDialog.Builder dialog = new AlertDialog.Builder(this); + //AlertDialog的构造方法全部是Protected的 + //所以不能直接通过new一个AlertDialog来创建出一个AlertDialog。 + //要创建一个AlertDialog，就要用到AlertDialog.Builder中的create()方法 + //如这里的dialog就是新建了一个AlertDialog + dialog.setTitle(R.string.app_name); + //为对话框设置标题 + dialog.setMessage(mSnippet); + //为对话框设置内容 + dialog.setPositiveButton(R.string.notealert_ok, this); + //给对话框添加"Yes"按钮 + if (isScreenOn()) { + dialog.setNegativeButton(R.string.notealert_enter, this); + }//对话框添加"No"按钮 + dialog.show().setOnDismissListener(this); + } + + public void onClick(DialogInterface dialog, int which) { + switch (which) { + case DialogInterface.BUTTON_NEGATIVE://这是取消操作 + Intent intent = new Intent(this, NoteEditActivity.class); + //实现两个类间的数据传输 + intent.setAction(Intent.ACTION_VIEW);//设置动作属性 + intent.putExtra(Intent.EXTRA_UID, mNoteId); + //实现key-value对 + //EXTRA_UID为key；mNoteId为键 + startActivity(intent);//开始动作 + break; + default://这是确定操作 + break; + } + } + + public void onDismiss(DialogInterface dialog) { + stopAlarmSound(); + finish(); + } + + private void stopAlarmSound() { + if (mPlayer != null) { + mPlayer.stop(); + mPlayer.release();//释放MediaPlayer对象 + mPlayer = null; + } + } +}