发送请求那行代码过不去

访问网络操作放在主线程了,放到分线程即可!

getData方法在分线程即可!

public List<Map<String, Object>> getData(){
final List<Map<String, Object>> list=new ArrayList<Map<String,Object>>();
new Thread(){
public void run(){
        try {
         String url=”http://guoqiang.x9.fjjsp01.com/factory/Get/null”;
        //  String url=”http://vsdemo.x9.fjjsp01.com/quality/mobile/getCustomer”;
         HttpGet post=new HttpGet(url);
         HttpClient httpClient = new DefaultHttpClient();
         HttpResponse response = httpClient.execute(post);
            // 执行get请求.    
    //  httpClient.getParams().setParameter(CoreConnectionPNames.CONNECTION_TIMEOUT, 5000);
  //      response = httpClient.execute(post);//发送请求
        Toast.makeText(getApplicationContext(), “2”, 0).show();

貌似这样写也不对啊！

引用 5 楼 vsxingchen 的回复:

貌似这样写也不对啊！

有错误吗?

protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.import_company_code_activity);
listView=(ListView)findViewById(R.id.list);  
List<Map<String, Object>>   list=getData();
        
        listView.setAdapter(new ListAdapter(this, list));  
        listView.setOnItemClickListener(new ItemClickListener()); 
}

方法public List<Map<String, Object>> getData(){
final List<Map<String, Object>> list=new ArrayList<Map<String,Object>>();
new Thread(){
public void run(){
        try {
         String url=”http://guoqiang.x9.fjjsp01.com/factory/Get/null”;
        //  String url=”http://vsdemo.x9.fjjsp01.com/quality/mobile/getCustomer”;
         HttpGet post=new HttpGet(url);
         HttpClient httpClient = new DefaultHttpClient();
         HttpResponse response = httpClient.execute(post);
            // 执行get请求.    
    //  httpClient.getParams().setParameter(CoreConnectionPNames.CONNECTION_TIMEOUT, 5000);
  //      response = httpClient.execute(post);//发送请求
        Toast.makeText(getApplicationContext(), “2”, 0).show();
        int statusCode=response.getStatusLine().getStatusCode();
        Toast.makeText(getApplicationContext(), “3”, 0).show();
        if (statusCode>= 200&&statusCode<400) {//判断请求是否成功
                HttpEntity entity = response.getEntity();
                String out = EntityUtils.toString(entity, “UTF-8”);
                //out=Base64.encodeToString(out.getBytes(“GBK”) ,Base64.DEFAULT);
                JSONArray array=new JSONArray(out);
                for(int i=0 ; i < array.length() ;i++){
                 Map<String, Object> map=new HashMap<String, Object>();
                 JSONObject myjObject = array.getJSONObject(i);
                 String title = myjObject.getString(“id”);
                 Toast.makeText(getApplicationContext(), title, 0).show();
                 String info = myjObject.getString(“name”);
                 String code = myjObject.getString(“code”);
                 map.put(“title”, title);
  map.put(“info”, info);
  map.put(“msg”, code);
  list.add(map);
                }
                        }
        } catch (Exception e) {
         Toast.makeText(getApplicationContext(), “URL请求失败”, 0).show();
                e.printStackTrace();
        }

}
}.start();
     return list;
}

先把toast给注掉,toast要在主线程!

引用 8 楼 vsxingchen 的回复:

问题是这样的话list返回的是空置吧！

咋样就改对对了又在分线程，又得返回数据！

用线程池,Executors.newSingleThreadExecutor()   将任务提交给ExecutorService

引用 11 楼 vsxingchen 的回复:

咋样就改对对了又在分线程，又得返回数据！

哦，谢谢了，我没有多用过线程，我研究下线程池

用线程池,Executors.newSingleThreadExecutor()   将任务提交给ExecutorService来执行同时调用Future.get()方法来获取结果!

引用 13 楼 vsxingchen 的回复:

哦，谢谢了，我没有多用过线程，我研究下线程池

没有用线程池也可以，但是刚进去是没有的数据点下才出来！

就单用了上面写的线程执行，但是数据刚进去没有点下才出来，是异步的？