10-03 18:38:32.041: E/Trace(685): error opening trace file: No such file or directory (2)
10-03 18:39:30.731: E/AndroidRuntime(685): FATAL EXCEPTION: AsyncTask #1
10-03 18:39:30.731: E/AndroidRuntime(685): java.lang.RuntimeException: An error occured while executing doInBackground()
10-03 18:39:30.731: E/AndroidRuntime(685): at android.os.AsyncTask$3.done(AsyncTask.java:299)
10-03 18:39:30.731: E/AndroidRuntime(685): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273)
10-03 18:39:30.731: E/AndroidRuntime(685): at java.util.concurrent.FutureTask.setException(FutureTask.java:124)
10-03 18:39:30.731: E/AndroidRuntime(685): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307)
10-03 18:39:30.731: E/AndroidRuntime(685): at java.util.concurrent.FutureTask.run(FutureTask.java:137)
10-03 18:39:30.731: E/AndroidRuntime(685): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
10-03 18:39:30.731: E/AndroidRuntime(685): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
10-03 18:39:30.731: E/AndroidRuntime(685): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
10-03 18:39:30.731: E/AndroidRuntime(685): at java.lang.Thread.run(Thread.java:856)
10-03 18:39:30.731: E/AndroidRuntime(685): Caused by: java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()
10-03 18:39:30.731: E/AndroidRuntime(685): at android.os.Handler.<init>(Handler.java:121)
10-03 18:39:30.731: E/AndroidRuntime(685): at android.widget.Toast$TN.<init>(Toast.java:322)
10-03 18:39:30.731: E/AndroidRuntime(685): at android.widget.Toast.<init>(Toast.java:91)
10-03 18:39:30.731: E/AndroidRuntime(685): at android.widget.Toast.makeText(Toast.java:238)
10-03 18:39:30.731: E/AndroidRuntime(685): at com.example.annapurna.DisplayContri$CreateContribution.doInBackground(DisplayContri.java:95)
10-03 18:39:30.731: E/AndroidRuntime(685): at com.example.annapurna.DisplayContri$CreateContribution.doInBackground(DisplayContri.java:1)
10-03 18:39:30.731: E/AndroidRuntime(685): at android.os.AsyncTask$2.call(AsyncTask.java:287)
10-03 18:39:30.731: E/AndroidRuntime(685): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
10-03 18:39:30.731: E/AndroidRuntime(685): ... 5 more
10-03 18:39:32.461: E/WindowManager(685): Activity com.example.annapurna.DisplayContri has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@4100b318 that was originally added here
10-03 18:39:32.461: E/WindowManager(685): android.view.WindowLeaked: Activity com.example.annapurna.DisplayContri has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@4100b318 that was originally added here
10-03 18:39:32.461: E/WindowManager(685): at android.view.ViewRootImpl.<init>(ViewRootImpl.java:374)
10-03 18:39:32.461: E/WindowManager(685): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:292)
10-03 18:39:32.461: E/WindowManager(685): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:224)
10-03 18:39:32.461: E/WindowManager(685): at android.view.WindowManagerImpl$CompatModeWrapper.addView(WindowManagerImpl.java:149)
10-03 18:39:32.461: E/WindowManager(685): at android.view.Window$LocalWindowManager.addView(Window.java:547)
10-03 18:39:32.461: E/WindowManager(685): at android.app.Dialog.show(Dialog.java:277)
10-03 18:39:32.461: E/WindowManager(685): at com.example.annapurna.DisplayContri$CreateContribution.onPreExecute(DisplayContri.java:82)
10-03 18:39:32.461: E/WindowManager(685): at android.os.AsyncTask.executeOnExecutor(AsyncTask.java:586)
10-03 18:39:32.461: E/WindowManager(685): at android.os.AsyncTask.execute(AsyncTask.java:534)
10-03 18:39:32.461: E/WindowManager(685): at com.example.annapurna.DisplayContri$1.onClick(DisplayContri.java:60)
10-03 18:39:32.461: E/WindowManager(685): at android.view.View.performClick(View.java:4084)
10-03 18:39:32.461: E/WindowManager(685): at android.view.View$PerformClick.run(View.java:16966)
10-03 18:39:32.461: E/WindowManager(685): at android.os.Handler.handleCallback(Handler.java:615)
10-03 18:39:32.461: E/WindowManager(685): at android.os.Handler.dispatchMessage(Handler.java:92)
10-03 18:39:32.461: E/WindowManager(685): at android.os.Looper.loop(Looper.java:137)
10-03 18:39:32.461: E/WindowManager(685): at android.app.ActivityThread.main(ActivityThread.java:4745)
10-03 18:39:32.461: E/WindowManager(685): at java.lang.reflect.Method.invokeNative(Native Method)
10-03 18:39:32.461: E/WindowManager(685): at java.lang.reflect.Method.invoke(Method.java:511)
10-03 18:39:32.461: E/WindowManager(685): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
10-03 18:39:32.461: E/WindowManager(685): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
10-03 18:39:32.461: E/WindowManager(685): at dalvik.system.NativeStart.main(Native Method)
10-03 18:44:31.601: E/Trace(712): error opening trace file: No such file or directory (2)
10-03 18:50:53.220: E/AndroidRuntime(712): FATAL EXCEPTION: AsyncTask #1
10-03 18:50:53.220: E/AndroidRuntime(712): java.lang.RuntimeException: An error occured while executing doInBackground()
10-03 18:50:53.220: E/AndroidRuntime(712): at android.os.AsyncTask$3.done(AsyncTask.java:299)
10-03 18:50:53.220: E/AndroidRuntime(712): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273)
10-03 18:50:53.220: E/AndroidRuntime(712): at java.util.concurrent.FutureTask.setException(FutureTask.java:124)
10-03 18:50:53.220: E/AndroidRuntime(712): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307)
10-03 18:50:53.220: E/AndroidRuntime(712): at java.util.concurrent.FutureTask.run(FutureTask.java:137)
10-03 18:50:53.220: E/AndroidRuntime(712): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
10-03 18:50:53.220: E/AndroidRuntime(712): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
10-03 18:50:53.220: E/AndroidRuntime(712): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
10-03 18:50:53.220: E/AndroidRuntime(712): at java.lang.Thread.run(Thread.java:856)
10-03 18:50:53.220: E/AndroidRuntime(712): Caused by: java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()
10-03 18:50:53.220: E/AndroidRuntime(712): at android.os.Handler.<init>(Handler.java:121)
10-03 18:50:53.220: E/AndroidRuntime(712): at android.widget.Toast$TN.<init>(Toast.java:322)
10-03 18:50:53.220: E/AndroidRuntime(712): at android.widget.Toast.<init>(Toast.java:91)
10-03 18:50:53.220: E/AndroidRuntime(712): at android.widget.Toast.makeText(Toast.java:238)
10-03 18:50:53.220: E/AndroidRuntime(712): at com.example.annapurna.DisplayContri$CreateContribution.doInBackground(DisplayContri.java:95)
10-03 18:50:53.220: E/AndroidRuntime(712): at com.example.annapurna.DisplayContri$CreateContribution.doInBackground(DisplayContri.java:1)
10-03 18:50:53.220: E/AndroidRuntime(712): at android.os.AsyncTask$2.call(AsyncTask.java:287)
10-03 18:50:53.220: E/AndroidRuntime(712): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
10-03 18:50:53.220: E/AndroidRuntime(712): ... 5 more
10-03 18:50:54.580: E/WindowManager(712): Activity com.example.annapurna.DisplayContri has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@4100a568 that was originally added here
10-03 18:50:54.580: E/WindowManager(712): android.view.WindowLeaked: Activity com.example.annapurna.DisplayContri has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@4100a568 that was originally added here
10-03 18:50:54.580: E/WindowManager(712): at android.view.ViewRootImpl.<init>(ViewRootImpl.java:374)
10-03 18:50:54.580: E/WindowManager(712): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:292)
10-03 18:50:54.580: E/WindowManager(712): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:224)
10-03 18:50:54.580: E/WindowManager(712): at android.view.WindowManagerImpl$CompatModeWrapper.addView(WindowManagerImpl.java:149)
10-03 18:50:54.580: E/WindowManager(712): at android.view.Window$LocalWindowManager.addView(Window.java:547)
10-03 18:50:54.580: E/WindowManager(712): at android.app.Dialog.show(Dialog.java:277)
10-03 18:50:54.580: E/WindowManager(712): at com.example.annapurna.DisplayContri$CreateContribution.onPreExecute(DisplayContri.java:82)
10-03 18:50:54.580: E/WindowManager(712): at android.os.AsyncTask.executeOnExecutor(AsyncTask.java:586)
10-03 18:50:54.580: E/WindowManager(712): at android.os.AsyncTask.execute(AsyncTask.java:534)
10-03 18:50:54.580: E/WindowManager(712): at com.example.annapurna.DisplayContri$1.onClick(DisplayContri.java:60)
10-03 18:50:54.580: E/WindowManager(712): at android.view.View.performClick(View.java:4084)
10-03 18:50:54.580: E/WindowManager(712): at android.view.View$PerformClick.run(View.java:16966)
10-03 18:50:54.580: E/WindowManager(712): at android.os.Handler.handleCallback(Handler.java:615)
10-03 18:50:54.580: E/WindowManager(712): at android.os.Handler.dispatchMessage(Handler.java:92)
10-03 18:50:54.580: E/WindowManager(712): at android.os.Looper.loop(Looper.java:137)
10-03 18:50:54.580: E/WindowManager(712): at android.app.ActivityThread.main(ActivityThread.java:4745)
10-03 18:50:54.580: E/WindowManager(712): at java.lang.reflect.Method.invokeNative(Native Method)
10-03 18:50:54.580: E/WindowManager(712): at java.lang.reflect.Method.invoke(Method.java:511)
10-03 18:50:54.580: E/WindowManager(712): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
10-03 18:50:54.580: E/WindowManager(712): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
10-03 18:50:54.580: E/WindowManager(712): at dalvik.system.NativeStart.main(Native Method)
10-03 18:50:57.681: E/Trace(732): error opening trace file: No such file or directory (2)
这里给出了发生错误的程序代码 -
package com.example.annapurna;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.NavUtils;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import java.util.ArrayList;
import java.util.List;
import org.apache.http.NameValuePair;
import org.apache.http.message.BasicNameValuePair;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.ProgressDialog;
import android.os.AsyncTask;
import android.util.Log;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class DisplayContri extends Activity {
// Progress Dialog
private ProgressDialog pDialog;
JSONParser jsonParser = new JSONParser();
EditText editText1;
//EditText text2;
//EditText text3;
// url to create new product
private static String url_create_product = "http://10.0.2.2/annapurna_connect/userold.php";
// JSON Node names
private static final String TAG_SUCCESS = "success";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_display_contri);
//Edit text
editText1 = (EditText) findViewById(R.id.editText1);
//text2 = (EditText) findViewById(R.id.editText2);
//text3 = (EditText) findViewById(R.id.editText3);
//Create Button
Button button1 = (Button) findViewById(R.id.button1);
//button click event
button1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// Creating new Contribution entry in background thread
new CreateContribution().execute("");
}
});
}
/**
* Background Async Task to Create new product
* */
class CreateContribution extends AsyncTask<String, String, String> {
/**
* Before starting background thread Show Progress Dialog
* */
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(DisplayContri.this);
pDialog.setMessage("Creating Product..");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
/**
* Creating product
* */
protected String doInBackground(String... args)
{
String name = editText1.getText().toString();
//String age = (text2.getText().toString());
//String id = (text3.getText().toString());
Toast toast2=Toast.makeText(getApplicationContext(), "Error2", Toast.LENGTH_LONG);//This is where the error shows
toast2.show();
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("name", name));
//params.add(new BasicNameValuePair("age", age));
//params.add(new BasicNameValuePair("id", id));
// getting JSON Object
// Note that create product url accepts POST method
JSONObject json = jsonParser.makeHttpRequest(url_create_product,
"POST", params);
// check log cat fro response
Log.d("Create Response", json.toString());
// check for success tag
try {
int success = json.getInt(TAG_SUCCESS);
if (success == 1) {
// successfully created product
Intent i = new Intent(getApplicationContext(), Annapurna.class);
startActivity(i);
// closing this screen
finish();
} else {
// failed to create product
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
/**
* After completing background task Dismiss the progress dialog
* **/
protected void onPostExecute(String file_url) {
// dismiss the dialog once done
pDialog.dismiss();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_display_contri, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
NavUtils.navigateUpFromSameTask(this);
return true;
}
return super.onOptionsItemSelected(item);
}
public void contributor(View view) {
Intent intent = new Intent(this, Contributor.class);
startActivity(intent);
}
}
有一个用于连接的 Jsonparsor.java 类。在上面的代码中，doInBackground方法（）没有执行，我通过添加toast测试了应用程序，我发现它没有进入doInBackground方法并执行到preexecute（）的最后结束