Android - editing multi column multi row file
<p>I have a file something like this</p>

<pre><code> 192000:   812500
 310500:   875000
 384000:   875000
 432000:   887500
 486000:   912500
 540000:   925000
 594000:   937500
 648000:   950000
 702000:   975000
 756000:  1000000
 810000:  1012500
 864000:  1037500
 918000:  1062500
 972000:  1087500
1026000:  1125000
1080000:  1137500
1134000:  1162500
1188000:  1187500
1242000:  1187500
1296000:  1187500
1350000:  1187500
1404000:  1200000
1458000:  1200000
1512000:  1250000
1536000:  1250000
1566000:  1250000
1620000:  1250000
1674000:  1275000
1728000:  1300000
1782000:  1325000
1836000:  1337500
1890000:  1350000
1944000:  1375000
</code></pre>

<p>What is the easiest way to replace the second column on a specific line
for example to replace <code>812500</code> in the first line with something else?</p>
