Android logging levels

Question

I\'m having a little difficulty configuring Android logging. Here\'s what my code looks like:

    if (Log.isLoggable(\"MY_TAG\", Log.VERBOSE)) {
        Log.         


        

Answer 1

It seems that later versions of Android want /data/local.prop to be writable by root only. The adb push command appears to initially create files with granting everyone read/write access (because default file mask is 777). Android, wisely, ignores /data/local.prop since this can be a security risk.

I have only experimented with Android 2.3.3, and 4.1.2. The former has no issues with reading a local.prop that is world writable, while the latter appears to silently ignore the file's contents.

Creating a local.prop file as described in the original question:

log.tag.MY_TAG=VERBOSE

And then pushing it onto the device as follows seems to do the trick:

adb push local.prop /data/local.prop
adb shell chmod 644 /data/local.prop
adb shell chown root.root /data/local.prop
adb reboot

You can double check to make sure that the values in local.prop were read by executing:

adb shell getprop | grep log.tag

So in summary:

• /data/local.prop is only read during boot.
• Later versions of Android appear to require that the permissions on the /data/local.prop file must be properly set, or it will not be read. The file must be writable by root only.

Using adb shell setprop log.tag.MyAppTag VERBOSE also work. The issue is that the property values are lost after a reboot.