mCheatButton = (Button) findViewById(R.id.cheat_button);
mCheatButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent i = new Intent(GeoQuiz.this, CheatActivity.class);
boolean answerIsTrue = mQuestionBank[mCurrentIndex].isTrueQuestion();
i.putExtra(CheatActivity.EXTRA_ANSWER_IS_TRUE,answerIsTrue);
i.putExtra(KEY_INDEX, mCurrentIndex);
startActivityForResult(i, 0);
}
});
mNextButton = (ImageButton) findViewById(R.id.next_button);
mNextButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mCurrentIndex = (mCurrentIndex+1)%mQuestionBank.length;
mIsCheater = false;
updateQuestion();
}
});

一样的，OnClickListener是View定义的接口，有import View.*的话就不用前缀也可以

如果你导入的两个或者多个包都有同名的接口或者类，那么你最好带前缀，防止用错