广播接收器。我的代码有什么问题？

Question

接收器代码：

public class OnBootReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {

          try {
                BufferedReader in=new BufferedReader(
                        new FileReader(MainNote.log));


                String AlarmString;
                int i = 0;


                while ((AlarmString = in.readLine())!=null)
                {
                    Long AlarmTime = Long.parseLong(AlarmString.substring(0, AlarmString.indexOf(" ")));
                    if (AlarmTime < System.currentTimeMillis()) i++;
                    else {
                        String AlarmArray[] = AlarmString.split("\\s");
                        Intent AlarmIntent = new Intent(context, AlarmReceiver.class);
                        if (AlarmArray[1].equals("null")) AlarmIntent.putExtra("alarm_message", "");
                        else AlarmIntent.putExtra("alarm_message", AlarmArray[1]);
                        if (AlarmArray[2].equals("true"))
                        AlarmIntent.putExtra("Vibration", true);
                        else AlarmIntent.putExtra("Vibration", false);
                        if (AlarmArray[3].equals("true"))
                        AlarmIntent.putExtra("Sound", true);
                        else AlarmIntent.putExtra("Sound", false);

                         final int _ID = (int) System.currentTimeMillis(); 
                         PendingIntent sender = PendingIntent.getBroadcast(context , _ID, AlarmIntent, PendingIntent.FLAG_UPDATE_CURRENT);
                         AlarmManager am = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
                         am.set(AlarmManager.RTC_WAKEUP, AlarmTime, sender);
                    }
                }

AlarmReceiver.class

public class AlarmReceiver extends BroadcastReceiver {

 @Override
 public void onReceive(Context context, Intent intent) {
     Bundle bundle = intent.getExtras();
     String message = bundle.getString("alarm_message");
     boolean Vibration = bundle.getBoolean("Vibration");
     boolean Sound = bundle.getBoolean("Sound");
     if (message.equals(null))
     NotifierHelper.sendNotification(context, MainNote.class, context.getResources().getString(R.string.NotTitle), context.getResources().getString(R.string.Nodiscr), 1, Sound, true, Vibration);
     else 
     NotifierHelper.sendNotification(context, MainNote.class, context.getResources().getString(R.string.NotTitle), message, 1, Sound, true, Vibration);
 }
}

清单代码：

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      android:versionCode="1"
      android:versionName="1.0">
    <uses-sdk android:minSdkVersion="4" />
    <uses-permission android:name="android.permission.VIBRATE" />   
    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />   
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />   
    <uses-permission android:name="android.permission.WAKE_LOCK" />    

    <application android:icon="@drawable/icon" android:label="@string/app_name">
        <activity android:label="@string/app_name" android:name=".MainNote">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        <activity android:name=".FingerPaint"></activity>
    <receiver  android:process=":remote" android:name=".AlarmReceiver"></receiver>

        <receiver android:name=".OnBootReceiver">
            <intent-filter>
                <action                      
android:name="android.intent.action.BOOT_COMPLETED"/>
            </intent-filter>
        </receiver>     
    </application>
</manifest>

MainNote.log 可以例如

1304094118826 text true true

重新启动后，我看到我的进程已启动，但随后我没有通知。这里出了什么问题？以及如何调试OnBootReciever中的代码？

我将 OnBootReciever 中的代码替换为

Intent AlarmIntent = new Intent(context, AlarmReceiver.class);
        AlarmIntent.putExtra("alarm_message", "blabla");
        AlarmIntent.putExtra("Vibration", true);
        AlarmIntent.putExtra("Sound", true);

         final int _ID = (int) System.currentTimeMillis(); 
         PendingIntent sender = PendingIntent.getBroadcast(context , _ID, AlarmIntent, PendingIntent.FLAG_UPDATE_CURRENT);
         AlarmManager am = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
         am.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis()+6000, sender); 

及其工作。所以问题出在我从文件中读取信息的部分。

MainNote.log 中存在一个问题。记录其静态变量，因此我无法在这里联系它。但现在我有一个非常奇怪的问题 -

java.io.FileNotFoundException: /mnt/sdcard/AlarmsFromDrawNote.alm (Permission denied)
com.notedraw.bos.app.OnBootReceiver1.onReceive(OnBootReceiver1.java:30) 

第 30 行是 -

BufferedReader in=new BufferedReader(new FileReader(log)); 

WTF？ （见清单）

Answer 1

您的 AlarmReceiver 需要是一个静态的 BroadcastReceiver，就像您的 OnBootReceiver 一样，以便它能够对您设置的警报起作用。不幸的是，我认为每个应用程序不能有多个静态接收器（我之前尝试过，但它对我不起作用）。您可以尝试在 OnBootReceiver 上放置两个意图过滤器并让它处理两个广播。

在 onRecieve 中，只需检查 intent.getAction() 以查看它正在接收哪个广播（启动广播或警报），并适当地处理它。

Answer 2

您需要在接收广播的类中创建一个新的广播接收器。将其放在类的顶部任何方法之外。

AlarmReceiver intentReceiver = new AlarmReceiver ();

你需要：

@Override
protected void onPause() {
    // TODO Mark time user logged out
    unregisterReceiver(intentReceiver);
    super.onPause();
}`

并且：

@Override
protected void onResume() {

    IntentFilter filter = new IntentFilter(CustomAction.MY_INTENT);
    filter.addAction(CustomAction.MY_INTENT);
    registerReceiver(intentReceiver, filter);
    super.onResume();
}