android 连续点击三次跳转到下一面

                int count = 0;

/**系统版本号 listener
	 * 
	 * 实现连续点击3次以上，跳转到下一个activity
	 * 
	 * @author elena_wang*/
	public OnPreferenceClickListener versionPrefListener = new OnPreferenceClickListener() {

		@Override
		public boolean onPreferenceClick(Preference paramPreference) {
			// TODO Auto-generated method stub
			
                        count++;
			if (count == 1) {
				start = System.currentTimeMillis();
				System.out.println("====start====" + start);
			}
			if (count == 3) {
				end = System.currentTimeMillis();
				System.out.println("====end====" + end);
			}
			if (count >= 3) {
				if ((end - start) < 700) {
					 startActivity(new Intent(SystemMsgActivity.this,SystemVersionAppserver.class));
					System.out.println("start intent");
				}
				System.out.println("====end-start====" + (end - start));
				count = 0;
			}
			if ((System.currentTimeMillis() - start) > 1000) {
				count = 0;
				start = System.currentTimeMillis();
				System.out.println("====超过1000ms=====");
			}
			return true;
		}
	};