程序一运行就崩溃！求助各位了！

小流***

错误提示：
09-13 14:59:32.462 7428-7452/com.chen.zhou.myapplication4 E/AndroidRuntime: FATAL EXCEPTION: AsyncTask #1
                                                                        Process: com.chen.zhou.myapplication4, PID: 7428
                                                                        java.lang.RuntimeException: An error occurred while executing doInBackground()
                                                                              at android.os.AsyncTask$3.done(AsyncTask.java:309)
                                                                              at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:354)
                                                                              at java.util.concurrent.FutureTask.setException(FutureTask.java:223)
                                                                              at java.util.concurrent.FutureTask.run(FutureTask.java:242)
                                                                              at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:234)
                                                                              at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
                                                                              at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
                                                                              at java.lang.Thread.run(Thread.java:818)
                                                                           Caused by: java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()
                                                                              at android.os.Handler.(Handler.java:200)
                                                                              at android.os.Handler.(Handler.java:114)
                                                                              at android.app.Activity.(Activity.java:754)
                                                                              at android.support.v4.app.BaseFragmentActivityGingerbread.(BaseFragmentActivityGingerbread.java:34)
                                                                              at android.support.v4.app.BaseFragmentActivityHoneycomb.(BaseFragmentActivityHoneycomb.java:29)
                                                                              at android.support.v4.app.BaseFragmentActivityJB.(BaseFragmentActivityJB.java:29)
                                                                              at android.support.v4.app.FragmentActivity.(FragmentActivity.java:75)
                                                                              at android.support.v7.app.AppCompatActivity.(AppCompatActivity.java:61)
                                                                              at com.chen.zhou.myapplication4.ItemBean.(ItemBean.java:8)
                                                                              at com.chen.zhou.myapplication4.MainActivity.getItemBean(MainActivity.java:58)
                                                                              at com.chen.zhou.myapplication4.MainActivity.access$000(MainActivity.java:22)
                                                                              at com.chen.zhou.myapplication4.MainActivity$NewAsyncTask.doInBackground(MainActivity.java:38)
                                                                              at com.chen.zhou.myapplication4.MainActivity$NewAsyncTask.doInBackground(MainActivity.java:34)
                                                                              at android.os.AsyncTask$2.call(AsyncTask.java:295)
                                                                              at java.util.concurrent.FutureTask.run(FutureTask.java:237)
                                                                              at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:234)
                                                                              at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
                                                                              at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
                                                                              at java.lang.Thread.run(Thread.java:818)
09-13 14:59:33.123 7428-7455/com.chen.zhou.myapplication4 E/Surface: getSlotFromBufferLocked: unknown buffer: 0x7f40c7d1a010

源码如下：MainActivity
android.os.AsyncTaskandroid.support.v7.app.AppCompatActivityandroid.os.Bundleandroid.util.Logandroid.widget.ListVieworg.json.JSONArrayorg.json.JSONExceptionorg.json.JSONObjectjava.io.BufferedInputStreamjava.io.BufferedReaderjava.io.IOExceptionjava.io.InputStreamjava.io.InputStreamReaderjava.io.UnsupportedEncodingExceptionjava.net.URLjava.util.ArrayListjava.util.ListMainActivity AppCompatActivity { String =ListView (Bundle savedInstanceState) {       .onCreate(savedInstanceState)setContentView(R.layout.)= (ListView) findViewById(R.id.)NewAsyncTask().execute()} String (InputStream is){       String result=InputStreamReader isr= String line={          isr = InputStreamReader(is)BufferedReader br=BufferedReader(isr)((line=br.readLine())!=){             result+=line}       } (UnsupportedEncodingException e) {          e.printStackTrace()} (IOException e) {          e.printStackTrace()} result} List(String url) {       List itemBeanlist = ArrayList()ItemBean itemBean{          String jsonString = readUrl(URL(url).openStream())JSONObject jsonObject = JSONObject(jsonString)JSONArray jsonArray = jsonObject.getJSONArray()(i = i < i++) {             jsonObject = jsonArray.getJSONObject(i)itemBean = ItemBean()itemBean.= jsonObject.getString()itemBean.= jsonObject.getString()itemBean.= jsonObject.getString()itemBeanlist.add(itemBean)}       } (IOException e) {          e.printStackTrace()} (JSONException e) {          e.printStackTrace()}       itemBeanlist} NewAsyncTask AsyncTask{       List (String... strings) {          getItemBean(strings[])}       (List itemBeanList) {          .onPostExecute(itemBeanList)MyAdapter adapter=MyAdapter(itemBeanListMainActivity.).setAdapter(adapter)} }}ItemBean:

android.support.v7.app.AppCompatActivityItemBean  { String String String }MyAdapter:
android.content.Contextandroid.view.LayoutInflaterandroid.view.Viewandroid.view.ViewGroupandroid.widget.BaseAdapterandroid.widget.ImageSwitcherandroid.widget.ImageViewandroid.widget.TextViewjava.util.ListMyAdapter BaseAdapter { List LayoutInflater Context MyAdapter(List itemBeanListContext context){       .=itemBeanList=LayoutInflater.(context)} () {       .size()} Object (i) {       .get(i)} (i) {       i} View (iView viewViewGroup viewGroup) {       ViewHolder viewHolder=(view==){          viewHolder=ViewHolder()view=.inflate(R.layout.)viewHolder.= (ImageView) view.findViewById(R.id.)viewHolder.= (TextView) view.findViewById(R.id.)viewHolder.= (TextView) view.findViewById(R.id.)view.setTag(viewHolder)}       {          viewHolder=(ViewHolder)view.getTag()}       viewHolder..setText(.get(i).)viewHolder..setText(.get(i).)viewHolder..setImageResource(R.mipmap.)view} ViewHolder{       ImageView TextView TextView }}

心酸***

异常信息里说的很清楚了：
Causedby:java.lang.RuntimeException:Can'tcreatehandlerinsidethreadthathasnotcalledLooper.prepare()不能在子线程创建handler。你看一下你是不是在异步加载的doInBackground()里创建的handler

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程序一运行就崩溃！求助各位了！

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