小编Alb*_*rto的帖子

我知道这个话题已被讨论很多但不是这个含义.我需要将日志存储在.txt文件中,但我不能使用log4j或任何其他类,但android.util.log我有这个解决方案,但它不是最好的.具有与以下相同的信息:Log.i(TAG,"一个信息消息"); 我要写...

ERROR = logLevel < 3;
WARNING = logLevel < 2;
INFO = logLevel < 1;
if (INFO){ 

    appendLog("LEVEL: I    TIME: "+java.util.GregorianCalendar.DAY_OF_MONTH +
                        "-"+ java.util.GregorianCalendar.MONTH +" "+GregorianCalendar.HOUR_OF_DAY +":"+GregorianCalendar.MINUTE +
                        ":"+GregorianCalendar.SECOND +"."+GregorianCalendar.MILLISECOND + "    PID: "+
                        android.os.Process.myPid()+ "    TID: "+android.os.Process.myTid()+ "    Application: com.example.myapplication"+
                        "    TAG:" +TAG+ "    TEXT: An INFO Message");
}

然后...

public void appendLog(String text) {        
    File logFile = new File("sdcard/log.txt"); 
    if (!logFile.exists()) { 
        try { 
            logFile.createNewFile(); 
        }catch (IOException e){ 
            e.printStackTrace(); 
      } 
   } 
   try { 
       BufferedWriter buf = …

该程序第一次创建首选项,但之后它永远不会更改它们.我很感激帮助理解为什么.

这是调用xml的PreferencesScreen.

public class PreferencesScreen extends PreferenceFragment{

private final String TAG = "PreferencesScreen";

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    Log.d(TAG, "OnCreate");
    addPreferencesFromResource(R.xml.prefs);
}

在首选项中,我有一个ListPreference和一个Preference,它调用一个活动来存储电子邮件.

<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android" >

<PreferenceCategory android:title="Information Collected">
    <ListPreference 
        android:key="loggins"
        android:title="Logs Stored"
        android:summary="Choose the top kind of logs do you want to store."
        android:dialogTitle="Choose Logs"
        android:entries="@array/logs"
        android:entryValues="@array/logsValues"/>
</PreferenceCategory>

 <PreferenceCategory android:title="Email Configurations">
        <Preference
              android:key="pushing"
              android:title="The Email Activity"
              android:summary="Just push">
             <intent android:action = "ADDING_EMAIL"/>
        </Preference>
 </PreferenceCategory>
</PreferenceScreen>

一切都在这里.问题出在所谓的......

public class AddingEmail extends ListActivity implements OnClickListener{       

private Set<String> emails; 
private …