Intent.getExtra提供nullPointerException

Question

In one class I have this:

Double iso1 = 0.0;
final Intent start = new Intent(IsoAbun.this, IsoAbunCal.class);
start.putExtra("iso1", iso1);
startActivity(start);

Then in the other class I have this:

Bundle b = getIntent().getExtras();
Double iiso1 = 0.0;
iiso1 = Double.parseDouble(b.getString("iso1"));

All that gives a nullPointerException. The code seems fine to me, so is there anything I am missing, or is more information required?

Answer 1

try b.getDouble(key)

hope it helps :)