安卓开发 httpclient导致的闪退问题

今天在安卓上写了一个调用服务器接口的小demo，然后发现多连接几次服务器程序就闪退，想了半天也不知道原因，后来把静态化的httpclient变成每一次请求都初始化一次，就再也没有问题了，这是正常了以后的代码
public Poem getOnePoem() {
try {
String baseUrl = "http://ip地址:8080/PoemServer/Poem/";

DefaultHttpClient httpClient = new DefaultHttpClient();
HttpGet get = new HttpGet(baseUrl+"getOneRandomPoem");
HttpResponse response= httpClient.execute(get);
HttpEntity entity = response.getEntity();

Map<String, String> maps = gson.fromJson(EntityUtils.toString(entity), new TypeToken<Map<String, String>>(){}.getType());

if(maps.get("code").equals("200")){
Poem poem = gson.fromJson(maps.get("data"), Poem.class);//new TypeToken<Poem>() {}.getType());
return poem;
}

} catch (ParseException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}

之前是在类中写了
static DefaultHttpClient httpClient = new DefaultHttpClient();
static HttpGet get = new HttpGet(baseUrl+"getOneRandomPoem");
static HttpResponse response= httpClient.execute(get);
static HttpEntity entity = response.getEntity();

然后总是连接几次就闪退，原因是因为在安卓中，进行网络请求要放在线程中，请求太快静态变量不是线程安全的，所以最好将方法加一个线程锁或者是每次请求初始化一次。