Converting Exponential value to Decimal Android -

i have string in format of "6.151536e-8"

how can convert string or int 0.000000061 ?

use if want have 2 significant digits:

string str = "6.151536e-8";   bigdecimal bd = new bigdecimal(str); bd = bd.round(new mathcontext(2, roundingmode.half_up)); system.out.println(bd.toplainstring()); 

this prints: 0.000000062

if want round down 0.000000061 use roundingmode.down