我有一个服务，从URL中提取HTML代码，仅将其转换为文本（使用Jsoup），然后检查字符串上的内容，如果某些条件为真，则启动通知并将某些内容写入文件。 据我所知，这种服务不应该占用太多内存，而在Watchdog中，它需要大约65 MB，而且太过分了。它需要比任何其他进程（甚至超过tw启动器和Android系统）。 我想告诉我，我做错了什么。
继承我的服务类：
public class NotifyService extends Service
{
private int number=0;
private Timer timer=new Timer();
private long INTERVAL=1*1000*60*60;//1 hour
public static String Oldhtml;
public static String Newhtml;
public static String currHtml;
// hooks main activity here
/*
* not using ipc...but if we use in future
*/
public IBinder onBind(Intent intent) {
return null;
}
@Override
public void onCreate()
{
super.onCreate();
_startService();
Log.w("myApp", "START");
}
@Override
public void onDestroy()
{
super.onDestroy();
_shutdownService();
Log.w("myApp", "STOPPED");
}
/*
* starting the service
*/
private void _startService()
{
timer.scheduleAtFixedRate(new TimerTask() {
public void run() {
try {
doServiceWork();
} catch (ClientProtocolException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
try {
Thread.sleep(INTERVAL);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
},0,INTERVAL);
;
}
/*
* start the processing, the actual work, getting config params, get data from network etc
*/
private void doServiceWork() throws ClientProtocolException, IOException
{
String FILENAME="blichData";
String info=null;
String classLetter = null,classNum1=null;
int classNum = 0;
try{
FileInputStream fis=openFileInput(FILENAME);
byte[] dataArray = new byte[fis.available()];
while(fis.read(dataArray)!=-1)
{
info = new String(dataArray);
}
classLetter = info.substring(0, info.lastIndexOf(" "));
classNum1 =info.substring(info.lastIndexOf(" ")+1);
classNum=Integer.parseInt(classNum1);
fis.close();
}catch (Exception e){
}
if (classLetter!=null && classNum1!=null) {
Oldhtml=readHTMLfromFile();
if (GetHTML.isHavingChanges(classLetter,classNum))
{
myNotify();
writeHTMLtoFile(currHtml);
/*
try {
String data= "false";
FileOutputStream fos = openFileOutput("blichService", Context.MODE_PRIVATE);
fos = openFileOutput("blichService",Context.MODE_PRIVATE);
fos.write(data.getBytes());
fos.close();
}
catch (Exception e) {}
*/
}
}
;
}
/*
* shutting down the service
*/
private void _shutdownService()
{
if (timer != null) timer.cancel();
Log.i(getClass().getSimpleName(), "Timer stopped...");
}
public void writeHTMLtoFile(String html) {
try {
String FILENAME = "blichNotifyData";
String data= html;
FileOutputStream fos = openFileOutput(FILENAME, Context.MODE_PRIVATE);
fos = openFileOutput(FILENAME,Context.MODE_PRIVATE);
fos.write(data.getBytes());
fos.close();
}
catch (Exception e){}
}
public String readHTMLfromFile() {
String FILENAME = "blichNotifyData";
String info="";
try{
FileInputStream fis=openFileInput(FILENAME);
if (fis.available()>0)
{
byte[] dataArray = new byte[fis.available()];
while(fis.read(dataArray)!=-1)
{
info = new String(dataArray);
}
fis.close();
}
else {
Oldhtml="null";
}
}
catch (Exception e) {}
return info;
}
public void myNotify()
{
NotificationManager nm = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
Intent intent= new Intent (this,SchoolBlichActivity.class);
PendingIntent pi = PendingIntent.getActivity(this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT | PendingIntent.FLAG_ONE_SHOT);
String body = " בליך";
String title = "ישנם שינויים חדשים!";
Notification n =new Notification(R.drawable.table, body, System.currentTimeMillis());
n.flags |=Notification.FLAG_AUTO_CANCEL;
n.setLatestEventInfo(getApplicationContext(), title, body, pi);
n.defaults = Notification.DEFAULT_ALL;
number++;
n.number=number;
nm.notify(0,n);
}
}
如果需要，HTML提取类：
public class GetHTML {
public static boolean isHavingChanges(String classLetter,int classNum) throws ClientProtocolException, IOException {
int classLetterCode = 0;
int timeTableCode=1;
if (classLetter.equals("ט"))
classLetterCode=0;
else if (classLetter.equals("י"))
classLetterCode=1;
else if (classLetter.equals("יא"))
classLetterCode=2;
else if (classLetter.equals("יב"))
classLetterCode=3;
switch(classLetterCode)
{
case 0:
if (classNum>=1 && classNum<=7)
timeTableCode=1;
else if (classNum>7 && classNum<=14)
timeTableCode=2;
break;
case 1:
if (classNum>=1 && classNum<=7)
timeTableCode=3;
else if (classNum>7 && classNum<=14)
timeTableCode=4;
break;
case 2:
if (classNum>=1 && classNum<=7)
timeTableCode=5;
else if (classNum>7 && classNum<=14)
timeTableCode=6;
break;
case 3:
if (classNum>=1 && classNum<=7)
timeTableCode=7;
else if (classNum>7 && classNum<=14)
timeTableCode=8;
break;
}
String url = "http://blich.iscool.co.il/DesktopModules/IS.TimeTable/MainScreen.aspx?pid=17&mid=6264&page="+timeTableCode+"&msgof=0&static=1";
HttpClient client = new DefaultHttpClient();
HttpGet request = new HttpGet(url);
HttpResponse response = client.execute(request);
String html = "";
InputStream in = response.getEntity().getContent();
BufferedReader reader = new BufferedReader(new InputStreamReader(in));
StringBuilder str = new StringBuilder();
String line = null;
while((line = reader.readLine()) != null)
{
str.append(line);
}
in.close();
html = str.toString();
html = Jsoup.parse(html).text();
if (NotifyService.Oldhtml.equalsIgnoreCase(html)) {
return false;
}
if (timeTableCode%2!=0){
for (int i=0;i<8;i++) {
if (!html.contains(i+" "+i)) {
NotifyService.currHtml=html;
return true;
}
}
}
if (timeTableCode%2==0) {
for (int i=8;i<15;i++) {
if (!html.contains(i+" "+i)) {
NotifyService.currHtml=html;
return true;
}
}
}
return false;
}
}
忽略外语。的xD 我只想了解我做错了什么？ 感谢
答案 0 :(得分：1)
虽然我不能说开箱即用的代码部分是有问题的，但您可以尝试通过使用Eclipse MAT使用DDMS进行的堆转储来分析内存使用情况。您需要使用hprofconv工具将Android堆转储转换为MAT理解的格式。
要获取HPROF堆转储，请打开Dalvik调试监视器（DDMS），将其连接到您的仿真器，选择应用程序的过程并点击“转储HPROF文件”图标。