By default, the Android system sends stdout and stderr
- (System.out and System.err) output to /dev/null. In
- processes that run the Dalvik VM, you can have the system write a copy of the output to the log
- file. In this case, the system writes the messages to the log using the log tags
- stdout and stderr, both with priority I.
To route the output in this way, you stop a running emulator/device instance and then use the
- shell command setprop to enable the redirection of output. Here's how you do it:
-$ adb shell stop -$ adb shell setprop log.redirect-stdio true -$ adb shell start -- -
The system retains this setting until you terminate the emulator/device instance. To use the
- setting as a default on the emulator/device instance, you can add an entry to
- /data/local.prop on the device.
/dev/null. (The Java System.out and System.err
+ streams go to the log.)