I have to parse the logcat output for my android application.So i wanted to know logcat content. I surfed a lot but i don't a proper answer. what are the logcat contents and when the system writes the logcat file?
Thanks
Pushpa
There's no api that I know of to read the logcat directly into your program. The easiest thing to do is to run logcat externally from your app and collect the results. One example of how to do that is here (see LogcatProcessor.java). Another, more elaborate, version is here (see SendLogActivity.java).
You will need this line in your manifest:
<uses-permission android:name="android.permission.READ_LOGS" />
Related
I've read many posts about this but nothing seems to solve the problem.
I've created a simple app that basically consists of:
Log.d("RSE", Environment.getExternalStorageState());
Log.d("RSE", "Readable? " + Environment.getExternalStoragePublicDirectory("Movies").canRead());
It always says mounted and Readable? false
When I try to do anything more, I get a permission denied error.
I've added
<uses-permission android:name="ANDROID.PERMISSION.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="ANDROID.PERMISSION.READ_EXTERNAL_STORAGE" />
inside AndroidManifest.xml inside the <manifest> tag and before the <application> tag.
Depending on the device, I've personally found Environment.getExternalStorage*() to be unreliable in what it points to. In this case, it's probably pointing to the emulated storage which doesn't seem to like I/O. I ended up just using "/sdcard/Movies/" which worked far more reliably than Environment.getExternalStoragePublicDirectory("Movies") ever did.
I have no idea why but I recreated the AVD and now its readable.
I've seen a lot of different ways in Java to dump Android logcat messages to a file, but I haven't been able to find a way of doing it in C.
Is it possible to programmatically retrieve the messages in C and dump them to a file?
Create a child logcat process, read its stdout and use cstdio to save data to a file.
In that way Android isn't different from any other linux distributive.
I want to implement __android_log_write() functionality using write() or some api available in libc(actually ulibc). The reason being that i cannot use any libraries associated with android as that would increase the memory required. I have very limited amount of memory as my code is running in separate memory region reserved during boot up. Main goal is to attach my debugging logs to logcat.
I am looking something similar to this:
write(1,"sandy",6);
The abovce code i can directly write to stdout. Similarly, i want to use write() or something else and write to logcat. What is the clean way to do it.
Hope i am clear. Thanks.
Got the answer. We need to open /dev/radio and write into them.
Thanks
When I attempt to use the solution presented on SO here for dealing with large bitmaps in Android, I get an UnauthorizedAccessException at the point I'm trying to read from the file system from a location such as:
/mnt/sdcard/DCIM/Camera/IMG_20111223_122513.jpg
Is there a particular permission in my manifest I was supposed to select, or something else going on?
Well, there is always this one:
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
If you're looking to display a screen-sized version of a full-resolution photograph, may I please refer you to the Android Training article on this subject.
In Android, What is the difference between two namespaces,
android.util.Log
java.util.Logging
I am using android.util.Log. Now i am trying to save log to file, but file logging functions are not available in android.util.Log, how to do it ?
-- edit --
I already use Log.d(), Log.e() everywhere in my app, is there any way to redirect them to file, instead of changing code and adding another library ?
In this answer microlog4android is recommended, but i'm not able to find any documentation or examples.
How CatLog is able to grab all logs and save it to a file? I want to do that in my application itself.
Similar questions have been asked here and here. They both suggest to have a look at microlog4android.
Found similar question and answer
use logcat -f in order to dump it to a file in the filesystem.