嗨我正在查看详细信息然后当我点击右下方按钮，返回列表视图时，我有错误＆＃34; android.view.ViewRootImpl $ CalledFromWrongThreadException：只有创建视图的原始线程层次结构可以触及它的观点。＆＃34; 但我不知道如何解决这个问题：
public class Record extends ListActivity {
// Progress Dialog
private ProgressDialog pDialog;
// JSON parser class
JSONParser jsonParser = new JSONParser();
//testing on Emulator:
private static final String READ_SPECIFIC_RECORD_URL = "http://192.168.1.178:8888/searchdb/record.php";
//JSON IDS:
private static final String TAG_TITLE = "title";
private static final String TAG_POSTS = "posts";
private static final String TAG_ADDRESS = "address";
private static final String TAG_OPHOURS = "ophours";
private static final String TAG_CONTACT = "contact";
private static final String TAG_CONTACT2 = "contact2";
private static final String TAG_CAT = "cat";
private static final String TAG_BRAND = "brand";
private static final String TAG_COMPANY = "company";
private static final String TAG_RATINGS = "avgrating";
//An array of all of our comments
private JSONArray mComments = null;
//manages all of our comments in a list.
private ArrayList<HashMap<String, String>> mCommentList;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//note that use read_comments.xml instead of our single_post.xml
setContentView(R.layout.details);
}
@Override
protected void onResume() {
// TODO Auto-generated method stub
super.onResume();
//loading the comments via AsyncTask
new LoadRecordDetails().execute();
}
/**
* Retrieves json data of comments
*/
/**
* Retrieves recent post data from the server.
*/
public void updateJSONdata() {
// Instantiate the arraylist to contain all the JSON data.
// we are going to use a bunch of key-value pairs, referring
// to the json element name, and the content, for example,
// message it the tag, and "I'm awesome" as the content..
Bundle b = getIntent().getExtras();
String id = b.getString("key");
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("id", id));
Log.d("request!", "starting");
//Posting user data to script
JSONObject json = jsonParser.makeHttpRequest(
READ_SPECIFIC_RECORD_URL, "POST", params);
// full json response
Log.d("Search attempt", json.toString());
mCommentList = new ArrayList<HashMap<String, String>>();
//when parsing JSON stuff, we should probably
//try to catch any exceptions:
try {
mComments = json.getJSONArray(TAG_POSTS);
// looping through all posts according to the json object returned
for (int i = 0; i < mComments.length(); i++) {
JSONObject c = mComments.getJSONObject(i);
//gets the content of each tag
String title = c.getString(TAG_TITLE);
String address = c.getString(TAG_ADDRESS);
String ophours = c.getString(TAG_OPHOURS);
String contact = c.getString(TAG_CONTACT);
String contact2 = c.getString(TAG_CONTACT2);
String cat = c.getString(TAG_CAT);
String brand = c.getString(TAG_BRAND);
String company = c.getString(TAG_COMPANY);
String avgrating = c.getString(TAG_RATINGS);
// creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
map.put(TAG_TITLE, title);
map.put(TAG_ADDRESS, address);
map.put(TAG_OPHOURS, ophours);
map.put(TAG_CONTACT, contact);
map.put(TAG_CONTACT2, contact2);
map.put(TAG_CAT, cat);
map.put(TAG_BRAND, brand);
map.put(TAG_COMPANY, company);
map.put(TAG_RATINGS, avgrating);
// adding HashList to ArrayList
mCommentList.add(map);
//annndddd, our JSON data is up to date same with our array list
}
} catch (JSONException e) {
e.printStackTrace();
}
}
/**
* Inserts the parsed data into our listview
*/
private void updateList() {
// For a ListActivity we need to set the List Adapter, and in order to do
//that, we need to create a ListAdapter. This SimpleAdapter,
//will utilize our updated Hashmapped ArrayList,
//use our single_post xml template for each item in our list,
//and place the appropriate info from the list to the
//correct GUI id. Order is important here.
ListAdapter adapter = new SimpleAdapter(this, mCommentList,
R.layout.single_record, new String[] { TAG_TITLE, TAG_ADDRESS,
TAG_OPHOURS, TAG_CONTACT, TAG_CONTACT2, TAG_CAT, TAG_BRAND, TAG_COMPANY, TAG_RATINGS },
new int[] { R.id.outletname, R.id.outletaddress, R.id.outletophours, R.id.outletcontact,
R.id.outletcontact2, R.id.outletcat, R.id.outletbrand, R.id.outletcompany, R.id.ratings});
((SimpleAdapter) adapter).setViewBinder(new MyBinder());
setListAdapter(adapter);
//Showing empty view when ListView is empty
ListView listView = (ListView) findViewById(android.R.id.list);
listView.setEmptyView(findViewById(android.R.id.empty));
}
//ratingsbar
class MyBinder implements SimpleAdapter.ViewBinder {
public boolean setViewValue(View view, Object data, String textRepresentation) {
if(view.getId() == R.id.ratings){
String stringval = (String) data;
float ratingValue = Float.parseFloat(stringval);
RatingBar ratingBar = (RatingBar) view;
ratingBar.setRating(ratingValue);
return true;
}
return false;
}
}
//call
public class LoadRecordDetails extends AsyncTask<Void, Boolean, Boolean> {
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(Record.this);
pDialog.setMessage("Loading details...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
pDialog.show();
}
@Override
protected Boolean doInBackground(Void... arg0) {
updateJSONdata();
return null;
}
@Override
protected void onPostExecute(Boolean result) {
super.onPostExecute(result);
pDialog.dismiss();
updateList();
}
}
}
来自logcat：
02-24 23:38:26.033 5653-5789/com.example.searchtest W/dalvikvm﹕ threadid=19: thread exiting with uncaught exception (group=0x4172ac08)
02-24 23:38:26.038 5653-5789/com.example.searchtest E/AndroidRuntime﹕ FATAL EXCEPTION: AsyncTask #4
Process: com.example.searchtest, PID: 5653
java.lang.RuntimeException: An error occured while executing doInBackground()
at android.os.AsyncTask$3.done(AsyncTask.java:300)
at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:355)
at java.util.concurrent.FutureTask.setException(FutureTask.java:222)
at java.util.concurrent.FutureTask.run(FutureTask.java:242)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
at java.lang.Thread.run(Thread.java:841)
Caused by: android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views.
at android.view.ViewRootImpl.checkThread(ViewRootImpl.java:7069)
at android.view.ViewRootImpl.invalidateChildInParent(ViewRootImpl.java:1108)
at android.view.ViewGroup.invalidateChild(ViewGroup.java:4542)
at android.view.View.invalidate(View.java:11795)
at android.view.View.invalidate(View.java:11736)
at android.widget.ImageView.invalidateDrawable(ImageView.java:211)
at android.graphics.drawable.Drawable.invalidateSelf(Drawable.java:393)
at android.graphics.drawable.Drawable.setVisible(Drawable.java:624)
at android.widget.ImageView.onDetachedFromWindow(ImageView.java:1265)
at android.view.View.dispatchDetachedFromWindow(View.java:13543)
at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:2800)
at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:2800)
at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:2800)
at android.view.ViewGroup.removeAllViewsInLayout(ViewGroup.java:4249)
at android.widget.AbsListView.resetList(AbsListView.java:2388)
at android.widget.ListView.resetList(ListView.java:527)
at android.widget.ListView.setAdapter(ListView.java:468)
at android.app.ListActivity.setListAdapter(ListActivity.java:265)
at com.example.searchtest.Results.updateList(Results.java:90)
at com.example.searchtest.Results.access$100(Results.java:23)
at com.example.searchtest.Results$LoadResults.doInBackground(Results.java:154)
at com.example.searchtest.Results$LoadResults.doInBackground(Results.java:138)
at android.os.AsyncTask$2.call(AsyncTask.java:288)
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
at java.lang.Thread.run(Thread.java:841)
谢谢！ ：d
答案 0 :(得分：0)
日志文件告诉我们：
android.view.ViewRootImpl$CalledFromWrongThreadException:
Only the original thread that created a view hierarchy can touch its views.
这个例子意味着你试图窃听不在这个帖子中的视图。
以下是解释：
有线程调用UI，在您的代码中还有一个名为AsyncTask的线程
在这一行：updateList();您正在调用试图隐藏UI thread中的视图的方法，如下所示：
ListView listView = (ListView) findViewById(android.R.id.list);
因此，要解决此问题，只需删除此行并将其放入onCreate，因此您的代码应如下所示：
public class Record extends ListActivity {
.
.
.
ListView listView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//note that use read_comments.xml instead of our single_post.xml
setContentView(R.layout.details);
listView = (ListView) findViewById(android.R.id.list);
}
}