【发布时间】：2015-04-28 13:52:58
【问题描述】：
我正在尝试使用 JSON 和 php 从 phpMyAdmin 获取数据。我正在使用安卓工作室。我尝试使用进度对话框，然后窗口泄漏（已经使用 p.Dialog.dismiss()）。之后，我删除了进度对话框，然后出现新的异常。有没有其他方法可以解决这个问题？
这是我的日志。
java.lang.RuntimeException: An error occured while executing doInBackground()
at android.os.AsyncTask$3.done(AsyncTask.java:299)
at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:352)
at java.util.concurrent.FutureTask.setException(FutureTask.java:219)
at java.util.concurrent.FutureTask.run(FutureTask.java:239)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
at java.lang.Thread.run(Thread.java:838)
Caused by: android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views.
at android.view.ViewRootImpl.checkThread(ViewRootImpl.java:5351)
at android.view.ViewRootImpl.requestLayout(ViewRootImpl.java:970)
at android.view.View.requestLayout(View.java:15722)
at android.view.View.requestLayout(View.java:15722)
at android.view.View.requestLayout(View.java:15722)
at android.view.View.requestLayout(View.java:15722)
at android.view.View.requestLayout(View.java:15722)
at android.view.View.requestLayout(View.java:15722)
at android.widget.RelativeLayout.requestLayout(RelativeLayout.java:318)
at android.view.View.requestLayout(View.java:15722)
at android.widget.TextView.checkForRelayout(TextView.java:6605)
at android.widget.TextView.setText(TextView.java:3804)
at android.widget.TextView.setText(TextView.java:3662)
at android.widget.TextView.setText(TextView.java:3637)
at com.example.ayim.madoc.docProfile$DocProfile.doInBackground(docProfile.java:113)
at com.example.ayim.madoc.docProfile$DocProfile.doInBackground(docProfile.java:67)
at android.os.AsyncTask$2.call(AsyncTask.java:287)
at java.util.concurrent.FutureTask.run(FutureTask.java:234)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
at java.lang.Thread.run(Thread.java:838)
这是我写的代码。
package com.example.ayim.madoc;
import android.app.ProgressDialog;
import android.content.Intent;
import android.os.AsyncTask;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.util.Log;
import android.widget.TextView;
import android.widget.Toast;
import org.apache.http.NameValuePair;
import org.apache.http.message.BasicNameValuePair;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.ArrayList;
import java.util.List;
public class docProfile extends ActionBarActivity {
TextView nameDoc;
TextView iddoc;
TextView icdoc;
TextView adddoc;
TextView notel;
private ProgressDialog pDialog;
//JSONArray docprofile = null;
JSONParser jsonParser = new JSONParser();
private static final String LOGIN_URL = "http://104.223.3.210/madoc/docprofile.php";
//JSON element ids from repsonse of php script:
private static final String TAG_SUCCESS = "success";
private static final String TAG_MESSAGE = "message";
private static final String TAG_DOCTOR = "doctor";
private static final String TAG_ID = "id";
private static final String TAG_NAME = "name";
private static final String TAG_IC = "ic";
private static final String TAG_ADDRESS = "address";
private static final String TAG_NOTEL = "notel";
//String iddoctor;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_doc_profile);
// Intent i = getIntent();
//iddoctor = i.getStringExtra("idDoc");
new DocProfile().execute();
//nameDoc = (TextView) findViewById(R.id.docId);
//nameDoc.setText(getIntent().getExtras().getString("idDoc"));
}
class DocProfile extends AsyncTask<String, String, String> {
/*
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(docProfile.this);
pDialog.setMessage("Loading Profile. Please wait....");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
*/
@Override
protected String doInBackground(String... params) {
String idd = getIntent().getExtras().getString("idDoc");
int success;
try {
List<NameValuePair> param = new ArrayList<NameValuePair>();
param.add(new BasicNameValuePair("id",idd));
JSONObject json = jsonParser.makeHttpRequest(LOGIN_URL, "GET", param);
Log.d("Doctor Profile", json.toString());
success = json.getInt(TAG_SUCCESS);
if (success == 1) {
JSONArray docProfile = json.getJSONArray(TAG_DOCTOR);
JSONObject docProf = docProfile.getJSONObject(0);
nameDoc = (TextView) findViewById(R.id.name);
iddoc = (TextView) findViewById(R.id.docId);
icdoc = (TextView) findViewById(R.id.icdoctor);
adddoc = (TextView) findViewById(R.id.addressdoc);
notel = (TextView) findViewById(R.id.noteldoc);
nameDoc.setText(docProf.getString("name"));
iddoc.setText(docProf.getString("id"));
icdoc.setText(docProf.getString("ic"));
adddoc.setText(docProf.getString("address"));
notel.setText(docProf.getString("noTel"));
} else {
//no doctor
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
protected void onPostExecute(String file_url) {
// dismiss the dialog once product deleted
pDialog.dismiss();
//if (file_url != null){
// Toast.makeText(docProfile.this, file_url, Toast.LENGTH_LONG).show();
// }
}
}
}
【问题讨论】：
-
你读过一些stackoverflow.com/search?q=CalledFromWrongThreadException 吗？如果没有，我会建议这个comment
-
是的，不要从错误的线程调用。 stackoverflow.com/q/5161951/603270
-
是的......我已经尝试过这个方法......并且应用程序崩溃......
标签： java android multithreading android-asynctask