Use the terminal to enter text on Android devices.

text.sh

#!/bin/sh
#############################################
#
# text.sh inputs text on Android devices
#         using adb shell.
#
# author: Jared Rummler
# since: Oct 22, 2014
# version: 1.0
#

cat > ./temp.sh << EOF
#!/system/bin/sh

phrase="\$@"
length=\$(echo "\$phrase" | wc -w)
n=0

for i in \$phrase
do
	let n++
	input text \$i
	if [ \$n -lt \$length ]
	then
		# Add a space between words.
		input keyevent 62
	fi
done
EOF

adb="adb wait-for-device"

$adb push ./temp.sh /sdcard/temp.sh
$adb shell su -c "cp /sdcard/temp.sh /data/local/temp.sh"
$adb shell sh -c "rm /sdcard/temp.sh"
$adb shell su -c "chmod 0755 /data/local/temp.sh"
$adb shell su -c "sh /data/local/temp.sh $@"
$adb shell su -c "rm /data/local/temp.sh"

rm ./temp.sh