GPS代码没有错误但没有显示位置

Right it will run on the emulator but wont show the location. The gps is turned on in the setting as well. I got the code from a tutorial and it worked for a lot of ppl but no1 has encountered my problem. I would be grateful if someone could tell me why. Oh and im running on android 2.2Right it will run on the emulator but wont show