解析特定的文本文件java

Question

我有一个来自adb的logcat文件。该文件就像下面这样，

09-03 17:12:04.562 479 957 I ActivityManager: Starting: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10200000 cmp=com.amazon.mShop.android/com.amazon.mShop.home.HomeActivity } from pid 1230 
09-03 17:12:04.687 479 1030 I ActivityManager: Start proc com.amazon.mShop.android for activity com.amazon.mShop.android/com.amazon.mShop.home.HomeActivity: pid=19164 uid=10158 gids={1006, 3003} 
09-03 17:12:05.593 479 912 I ActivityManager: Starting: Intent { dat=?paramSuggestionText=cell%20phone flg=0x20000 cmp=com.amazon.mShop.android/com.amazon.mShop.search.SearchActivity (has extras) } from pid 19164 
09-03 17:12:05.796 479 620 I ActivityManager: Displayed com.amazon.mShop.android/com.amazon.mShop.search.SearchActivity: +186ms (total +1s119ms) 
09-03 17:12:08.601 479 620 I ActivityManager: Displayed com.amazon.mShop.android/com.amazon.mShop.home.HomeActivity: +3s925ms 
09-03 17:12:08.601 479 620 I ActivityManager: Resumed Activity: com.amazon.mShop.android/com.amazon.mShop.search.SearchActivity totalTime: 4037 ms 
09-03 17:13:35.742 479 957 I ActivityManager: Starting: Intent { act=intentActionStartActivity flg=0x20000 cmp=com.amazon.mShop.android/com.amazon.mShop.categoryBrowse.CategoryBrowseActivity } from pid 19164 
09-03 17:13:36.007 479 620 I ActivityManager: Displayed com.amazon.mShop.android/com.amazon.mShop.categoryBrowse.CategoryBrowseActivity: +222ms 
09-03 17:13:53.328 479 957 I ActivityManager: Starting: Intent { dat=?&paramSuggestionFilters=s%3An%3A%2C%3A4991425011%0As%3An%3A%2C%3A4991426011%0As%3An%3A%2C%3A5088769011%0As%3An%3A%2C%3A5263615011&paramDepartmentName=Programs flg=0x20000 cmp=com.amazon.mShop.android/com.amazon.mShop.search.SearchActivity (has extras) } from pid 19164 
09-03 17:13:53.484 479 620 I ActivityManager: Displayed com.amazon.mShop.android/com.amazon.mShop.search.SearchActivity: +145ms 
09-03 17:14:54.585 479 484 I ActivityManager: Starting: Intent { cmp=com.amazon.mShop.android/com.amazon.mShop.barcodeSearch.BarcodeFirstTryTipActivity } from pid 19164 
09-03 17:14:54.718 479 620 I ActivityManager: Displayed com.amazon.mShop.android/com.amazon.mShop.barcodeSearch.BarcodeFirstTryTipActivity: +102ms 
09-03 17:15:30.210 479 957 I ActivityManager: Starting: Intent { flg=0x20000 cmp=com.amazon.mShop.android/com.amazon.mShop.search.SearchActivity (has extras) } from pid 19164 
09-03 18:03:02.140 479 967 I ActivityManager: Starting: Intent { act=intentActionStartActivity flg=0x4000000 cmp=com.amazon.mShop.android/com.amazon.mShop.home.HomeActivity } from pid 19164 
09-03 18:03:08.054 479 1005 I ActivityManager: Starting: Intent { dat= flg=0x20000 cmp=com.amazon.mShop.android/com.amazon.mShop.search.SearchActivity (has extras) } from pid 19164 
09-03 18:03:08.171 479 620 I ActivityManager: Displayed com.amazon.mShop.android/com.amazon.mShop.search.SearchActivity: +105ms 
09-03 18:04:24.937 479 967 I ActivityManager: Starting: Intent { cmp=com.amazon.mShop.android/com.amazon.mShop.barcodeSearch.BarcodeFirstTryTipActivity } from pid 19164 
09-03 18:04:25.046 479 620 I ActivityManager: Displayed com.amazon.mShop.android/com.amazon.mShop.barcodeSearch.BarcodeFirstTryTipActivity: +92ms 
09-03 18:05:00.554 479 5949 I ActivityManager: Starting: Intent { flg=0x20000 cmp=com.amazon.mShop.android/com.amazon.mShop.search.SearchActivity (has extras) } from pid 19164 
09-03 18:06:43.781 479 1019 I ActivityManager: Starting: Intent { act=intentActionStartActivity flg=0x4000000 cmp=com.amazon.mShop.android/com.amazon.mShop.home.HomeActivity } from pid 19164 
09-03 18:07:12.984 479 1001 I ActivityManager: Starting: Intent { dat= flg=0x20000 cmp=com.amazon.mShop.android/com.amazon.mShop.search.SearchActivity (has extras) } from pid 19164 
09-03 18:07:13.140 479 620 I ActivityManager: Displayed com.amazon.mShop.android/com.amazon.mShop.search.SearchActivity: +135ms 
09-03 18:08:29.890 479 5949 I ActivityManager: Starting: Intent { cmp=com.amazon.mShop.android/com.amazon.mShop.barcodeSearch.BarcodeFirstTryTipActivity } from pid 19164 
09-03 18:08:29.976 479 620 I ActivityManager: Displayed com.amazon.mShop.android/com.amazon.mShop.barcodeSearch.BarcodeFirstTryTipActivity: +81ms 
09-03 18:09:05.515 479 961 I ActivityManager: Starting: Intent { flg=0x20000 cmp=com.amazon.mShop.android/com.amazon.mShop.search.SearchActivity (has extras) } from pid 19164 
09-03 18:18:42.132 479 1039 I ActivityManager: Starting: Intent { act=intentActionStartActivity flg=0x20000 cmp=com.amazon.mShop.android/com.amazon.mShop.categoryBrowse.CategoryBrowseActivity } from pid 19164 
09-03 18:18:42.359 479 620 I ActivityManager: Displayed com.amazon.mShop.android/com.amazon.mShop.categoryBrowse.CategoryBrowseActivity: +144ms 
09-03 18:19:09.890 479 1030 I ActivityManager: Starting: Intent { act=intentActionStartActivity flg=0x4000000 cmp=com.amazon.mShop.android/com.amazon.mShop.home.HomeActivity } from pid 19164 
09-03 18:19:17.406 479 485 I ActivityManager: Starting: Intent { dat= flg=0x20000 cmp=com.amazon.mShop.android/com.amazon.mShop.search.SearchActivity (has extras) } from pid 19164 
09-03 18:19:17.515 479 620 I ActivityManager: Displayed com.amazon.mShop.android/com.amazon.mShop.search.SearchActivity: +97ms 
09-03 18:20:58.500 479 5949 I ActivityManager: Starting: Intent { flg=0x20000 cmp=com.amazon.mShop.android/.search.image.SnapItActivity } from pid 19164 
09-03 18:20:58.546 479 967 I ActivityManager: Starting: Intent { cmp=com.amazon.mShop.android/.search.image.SnapItPhotoCaptureActivity } from pid 19164 
09-03 18:20:58.898 479 620 I ActivityManager: Displayed com.amazon.mShop.android/.search.image.SnapItPhotoCaptureActivity: +340ms (total +387ms) 
09-03 18:21:26.156 479 1039 I ActivityManager: Starting: Intent { cmp=com.amazon.mShop.android/com.amazon.mShop.barcodeSearch.BarcodeFirstTryTipActivity } from pid 19164 
09-03 18:21:26.359 479 620 I ActivityManager: Displayed com.amazon.mShop.android/com.amazon.mShop.barcodeSearch.BarcodeFirstTryTipActivity: +185ms 
09-03 18:21:42.750 479 957 W ActivityManager: Duplicate finish request for HistoryRecord{408f9da0 com.amazon.mShop.android/com.amazon.mShop.barcodeSearch.BarcodeFirstTryTipActivity} 
09-03 18:26:05.968 479 963 I ActivityManager: Starting: Intent { act=intentActionStartActivity flg=0x4000000 cmp=com.amazon.mShop.android/com.amazon.mShop.home.HomeActivity } from pid 19164 
09-03 18:27:53.515 479 957 I ActivityManager: Starting: Intent { flg=0x10000000 cmp=com.amazon.mShop.android/com.amazon.mobileads.mraid.MraidBrowser (has extras) } from pid 19164 
09-03 18:27:54.750 479 620 I ActivityManager: Displayed com.amazon.mShop.android/com.amazon.mobileads.mraid.MraidBrowser: +1s218ms 
09-03 18:29:12.726 479 484 I ActivityManager: Starting: Intent { act=intentActionStartActivity flg=0x4000000 cmp=com.amazon.mShop.android/com.amazon.mShop.home.HomeActivity (has extras) } from pid 19164 
09-03 18:29:15.609 479 1039 I ActivityManager: Starting: Intent { flg=0x10000000 cmp=com.amazon.mShop.android/com.amazon.mobileads.mraid.MraidBrowser (has extras) } from pid 19164 
09-03 18:29:16.882 479 620 I ActivityManager: Displayed com.amazon.mShop.android/com.amazon.mobileads.mraid.MraidBrowser: +1s261ms 
09-03 18:32:41.750 479 967 I ActivityManager: Starting: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10200000 cmp=com.amazon.mShop.android/com.amazon.mShop.home.HomeActivity } from pid 1230 

现在我想从文件中提取活动名称。应当从与此类似每一行萃取，

09-03 18:29:15.609 479 1039 I ActivityManager: Starting: Intent { flg=0x10000000 cmp=com.amazon.mShop.android/com.amazon.mobileads.mraid.MraidBrowser (has extras) } from pid 19164 

从这个线我只需要字符串 com.amazon.mobileads.mraid.MraidBrowser 其它部分的

或

09-03 17:12:08.601 479 620 I ActivityManager: Resumed Activity: com.amazon.mShop.android/com.amazon.mShop.search.SearchActivity totalTime: 4037 ms 

该行需要被删除。不包含的行开始：意图或活动管理器：已恢复活动：应该删除。

最后，我将有一个像串序列，

com.amazon.mobileads.mraid.MraidBrowser 

com.amazon.mShop.search.SearchActivity 

等取决于它们的行号。

我该如何做到这一点？我可以使用字符串标记，但这是一个单调乏味的过程，正则表达式匹配或类似的会更好，我认为。

Answer 1

您可以尝试正则表达式

ActivityManager: (?:Starting: Intent.*?cmp=|Resumed Activity:\s*)(\S+) 

你想要的子将被存储在第1组。

看到它here on Regexr

要使用这个表达式在Java中，你已经逃脱所有的反斜线，所以它应该看起来像

ActivityManager: (?:Starting: Intent.*?cmp=|Resumed Activity:\\s*)(\\S+) 

第一部分从“ActivityManager”的字符串相匹配，直到部分你想提取和最后部分(\\S+)匹配，然后一系列非空白字符，并将其存储在组1中。

Answer 2

我知道我的方法可能不是很可爱，但它的工作原理。会是一个解决办法：

String filePath = "res/textfile.txt"; 
String line; 
List<String> myL = new ArrayList<String>(); 

try { 
    BufferedReader read = new BufferedReader(new FileReader(filePath)); 
    while((line = read.readLine()) != null) { 
     if(line.contains("Resumed Activity") || line.contains("Starting: Intent")) { 
      String str[] = line.split(" "); 
      for(String s : str) { 
       if(s.contains("com.amazon")) 
        myL.add(s); 
      } 
     } 
    } 

    for(String s : myL) { 
     System.out.println(s); 
    } 

} catch (FileNotFoundException e) { 
    e.printStackTrace(); 
} catch (IOException e) { 
    e.printStackTrace(); 
} 

更新： 我刚才通过您的文章读一遍又更新了我的解决方案。我错过了包括“恢复的活动”或“开始：意图”的行应该被删除。