I've found this technique to be useful to track down issues when React Native's tools haven't yet loaded, or don't show what I'm expecting. You should see all the logs from the phone appearing in the console, which you can then filter by application to find the output you're after. Now run react-native run-android and check for the output. Click on your device or emulator in the left-hand panel your debugging will appear in the LogCat panel at the bottom of the screen.Go back to Android Studio from the menu choose Tools > Android > Android Device Manager.Create or start your emulator from the AVD dialogue.adb logcat > mylogcat.txt 2>&1 & multitail mylogcat. From the Android Studio menu, choose Tools > Android > AVD. adb logcat want to see the logcat on the screen Using Ctrl+S to suspend, then Ctrl+Q to resume the display, and simply mouse scroll the terminal to back-track seeing the logcat output.It doesn't matter which project it is, but it must be an Android one to get the Android menu to be visible. From Android Studio, create or open an Android project.You will need to have Android Studio installed, and connect your device to your machine (if you're using a physical phone and not an emulator). If you're trying to find the logging for the emulator or device (not just React logging) then there is a way. The method in the thread is to read the data in Logcat through the IO stream, and then write the data into SDCard through the OutPutStream method.Debugging React Native apps on Android can be a bit of a pain. final InputStream is = exec.getInputStream Next, I will start using IO stream for character manipulation and save the data in Android SDCard.įirst, we define an InputStream. Through the above methods, we can obtain and filter the methods in Logcat. Process exec = Runtime.getRuntime().exec(running)； The function of this class is to use Java code for adb command line operation code. When we set it up, we also need a process class. We can also replace it with D: debug, I: info, E: error, and so on. The third is that the type W we want to filter represents warm. The second is - s, which means filtering. Third, we create the page first, and then read the contents of Txt text by line.įirst we need to define a String array with the code //The first one is Logcat, which is the log log we want to get.Next, I will start using IO stream for character manipulation and save the data in Android SDCard.
Display and retrieve Logcat log output on the Android interface.
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