axemorgan

import android.os.Build;
import android.os.Trace;
import android.support.annotation.NonNull;

/**
 * A wrapper for {@link Trace}, which is unavailable on SDK versions under 18 (Jelly Bean MR2).
 * Using any methods of this class on versions below 18 will result in a runtime exception.
 */
public class Tracer {
    private static final int REQUIRED_SDK = Build.VERSION_CODES.JELLY_BEAN_MR2;

axemorgan

import java.util.ArrayList;
import java.util.Collection;

/**
 * An {@link ArrayList} implementation that does not accept null values.  Attempts to add
 * <code>null</code> using any of the add methods will result in an {@link IllegalArgumentException}
 * being thrown.  Attempts to addAll from a Collection that contains null elements will also result
 * in an exception.
 * <p/>
 * Here's why: <a href="https://github.com/google/guava/wiki/UsingAndAvoidingNullExplained">UsingAndAvoidingNullExplained</a>

axemorgan

# A command line utility for automatically connecting ADB (Android Debug Bridge) to a USB connected Android device

# Records the status of the wifi interface on the device
adb shell ifconfig wlan0 > line
if [ "$?" -gt 0 ]
then
	echo "Couldn't read IP address from device.  Is it connected via USB?"
	exit 1
fi