java - 解析特定的文本文件java

标签 java android regex pattern-matching

我有一个来自 adb 的 logcat 文件。该文件如下所示，

  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 Activity 名称。它将从类似于此的每一行中提取，

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

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

从这一行我只需要字符串com.amazon.mobileads.mraid.MraidBrowser 线路的其他部分需要拆除。不包含 Starting:Intent 或 ActivityManager: Resumed Activity: 的行应被删除。

最后我将得到一个字符串序列，例如，

com.amazon.mobileads.mraid.MraidBrowser

com.amazon.mShop.search.SearchActivity

依此类推，具体取决于它们的行号。

我怎样才能实现这个目标？我可以使用字符串标记生成器，但这是一个乏味且低效的过程，我认为正则表达式匹配或类似的东西会更好。

最佳答案

您可以尝试正则表达式

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

您想要的子字符串将存储在组 1 中。

查看here on Regexr

要在 Java 中使用此正则表达式，您必须转义所有反斜杠，因此它应该如下所示

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

第一部分匹配“ActivityManager”中的字符串，直到您想要提取的部分，最后一部分 (\\S+) 匹配一系列非空白字符并将其存储在组 1 中。

关于java - 解析特定的文本文件java，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/12258176/

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