logcat

问题 I'm using Android Studio for Flutter App Development. Everything seems to be working fine just that the Android Studio does not show the "logs" in Logcat. In the Logcat section, it says "Please Configure Android SDK". Which is already configured. And in the Logcat section says "No Connected Devices." in the drop-down menu. When it has recognized my Android Phone and is showing it just under the Menu bar. Is there a fix for it? Is there something I am missing? 回答1: Flutter use Run tab to

问题 This question already has answers here : Why doesn't logcat show anything in my Android? (26 answers) Closed 3 years ago . I am using Eclipse classic to develope my Android applications. But I am not able to see any messages in the logcat. Till yesterday it was showing each and every message but now it is not showing anything. I have written a lot og log statements to trace my program, but because of this I am not able to trace. Can anybody say where is the problem? Thanks... 回答1: Try these

问题 Eclipse is acting strange. It shows every single log item as a warning (orange). Furthermore, each one's Time is '?:??', PID is '?', and Tag is also '?'. Screenshot below 回答1: Your Eclipse or SDK seems to be outdated, just update it. You are probably testing your app with an Android version (4.1??) which isn't fully supported by your current SDK version. 回答2: Please make sure that the device is online and it is selected in the DDMS and this is the one you are installing your application on.

问题 I believe there have been changes to the ways apps can read logs in android post 4.2. But I wanted to know if I can read all the logs including system logs from logcat from within an app for current versions of android? If yes does it need some permission or not? 回答1: Unless you rooted you cannot do this since Jelly Bean. See this Android bug report and this related discussion. Quote: The change is that third party applications can no longer get the read logs permission, however every app can

问题 I am trying to display long message on logcat. If the length of message is more than 1000 characters, it gets broken. What is the mechanism to show all characters of long message in logcat? 回答1: If logcat is capping the length at 1000 then you can split the string you want to log with String.subString() and log it in pieces. For example: int maxLogSize = 1000; for(int i = 0; i <= veryLongString.length() / maxLogSize; i++) { int start = i * maxLogSize; int end = (i+1) * maxLogSize; end = end >

问题 If you see the Android logs, you may see a lot of those things. What do they mean, knowing those may help us doing better memory allocations. Example: 28470 dalvikvm D GC_FOR_MALLOC freed 665 objects / 239992 bytes in 71ms 28470 dalvikvm D GC_FOR_MALLOC freed 673 objects / 240288 bytes in 87ms 21940 dalvikvm D GC_EXPLICIT freed 4802 objects / 185320 bytes in 78ms 28470 dalvikvm D GC_FOR_MALLOC freed 666 objects / 240536 bytes in 63ms 回答1: GC_FOR_MALLOC means that the GC was triggered because

问题 I have recently started to use Android Studio v0.1.1, And i can't seem to find LogCat... Is it gone? Or if not, how can I enable it? If it is gone, is there any way to enable something similar to log my app behavior (and mainly crashes)? 回答1: I think I still can find logcat in my installation of 0.1.1 Try pressing Alt + 6 on Windows or CMD + 6 on Mac. 回答2: Check if you have hidden it... Use Alt + 6 to bring up the window and click on the button shown below 'Restore logcat view' 回答3: You can

问题 I've got a real doozy here. When I click on spinners, open menu items, or open context menus on long-clicks I get the same Logcat message: 08-02 21:20:57.264: E/ViewRootImpl(31835): sendUserActionEvent() mView == null The tag is ViewRootImpl , and the message is sendUserActionEvent() mView == null . I could not find anything helpful about this on the web. I searched through the Android sources and found some references to mView , but I could not find the file in which this log message is

问题 I am getting the above error: error opening trace file: No such file or directory (2) when I run my android application on the emulator. Can someone tell me what could be the possible reason for this? I am using android-sdk-20 and below lines are added to AndroidManifest.xml <uses-sdk android:minSdkVersion="14" android:targetSdkVersion="15" /> I have also added the line: <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> since I thought that there may be some issue

问题 UPDATE: Please see "accepted" solution below When my app creates an unhandled exception, rather than simply terminating, I'd like to first give the user an opportunity to send a log file. I realize that doing more work after getting a random exception is risky but, hey, the worst is the app finishes crashing and the log file doesn't get sent. This is turning out to be trickier than I expected :) What works: (1) trapping the uncaught exception, (2) extracting log info and writing to a file.