Streak began a second spell as skipper last August
"I will keep going as long as my body allows. I love my country, I love my job, I'll keep going," he insisted.
Zimbabwe's World Cup campaign was overshadowed by politics.
England refused to to play in Harare because of security concerns, having been urged to boycott the match by their government in protest at the policies of President Robert Mugabe.
Streak was a leading voice in urging teams to travel to Zimbabwe despite his family being affected by the political turmoil.
His father was arrested in 2001 when his farm was occupied under the Government's controversial land reform programme.
Flower and Olonga, meanwhile, went out on a limb by wearing black armbands in their opening game against Namibia and claiming they were mourning the "death of democracy" in their country.
Streak's record for Zimbabwe
Despite the political backdrop, Zimbabwe qualified for the Super Six phase of the competition, but failed to win any of their three games thereafter.
"I think we didn't play to our full potential. We showed sparkles of what we're capable of. We weren't consistent enough at the end," Streak said.
Flower is to continue his career playing county cricket in England, but newspaper reports claim Olonga has gone into hiding.
The Sunday Telegraph claims he could be charged with treason if he returns home.
"I was never under the illusion that my stand would have no consequences but I believe that one should have the courage of one's convictions in life and do all one can do to uphold them," he commented.