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कभी कभी मैं इस दुर्घटना त्रुटि मेरे ऐपjava.lang.RuntimeException: कोई त्रुटि doInBackground निष्पादित करते समय हुई()
java.lang.RuntimeException: An error occured while executing doInBackground()
यह पूर्ण Logcat है में मिलता है:
java.lang.RuntimeException: An error occured while executing doInBackground()
at android.os.AsyncTask$3.done(AsyncTask.java:200)
at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:274)
at java.util.concurrent.FutureTask.setException(FutureTask.java:125)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:308)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1088)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:581)
at java.lang.Thread.run(Thread.java:1019)
Caused by: java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()
at android.os.Handler.<init>(Handler.java:121)
at android.widget.Toast.<init>(Toast.java:68)
at android.widget.Toast.makeText(Toast.java:231)
at kostas.menu.olympiakos.nea.loadFeed(nea.java:84)
at kostas.menu.olympiakos.nea.access$1(nea.java:75)
at kostas.menu.olympiakos.nea$BackgroundAsyncTask_nea.doInBackground(nea.java:242)
at kostas.menu.olympiakos.nea$BackgroundAsyncTask_nea.doInBackground(nea.java:1)
at android.os.AsyncTask$2.call(AsyncTask.java:185)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:306)
... 4 more
और यह मेरा है .nea वर्ग कोड:
package kostas.menu.olympiakos;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import android.app.Dialog;
import android.app.ListActivity;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.Window;
import android.view.animation.AlphaAnimation;
import android.view.animation.Animation;
import android.view.animation.AnimationSet;
import android.view.animation.LayoutAnimationController;
import android.view.animation.TranslateAnimation;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;
import android.widget.Toast;
public class nea extends ListActivity{
private List<Message> messages;
List<String> des = new ArrayList<String>();//to prosthesa gia na anoigei to keimeno sto alert
List<String> text = new ArrayList<String>();//to prosthesa gia na anoigei o titlos sto alert
List<URL> url = new ArrayList<URL>();//to prosthesa gia to koumpi pou pigainei sto link
List<String> imgl = new ArrayList<String>();//to prosthesa gia na anoigei to keimeno sto alert
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.main2);
if(isInternetOn()) {
new BackgroundAsyncTask_nea().execute();
}else{
Toast.makeText(nea.this,R.string.no_connection, Toast.LENGTH_SHORT).show();
finish();
}
}
private void loadFeed(AsyncTask<Void, Void, Void> asyncTask){
try{
BaseFeedParser parser = new BaseFeedParser();
messages = parser.parse();
}
catch (Throwable t){
Log.e("OSFP.News",t.getMessage(),t);
Toast.makeText(nea.this, "Χρειάζεστε σύνδεση στο internet",
Toast.LENGTH_SHORT).show();
finish();
}
}
private void displayRss(){
ArrayList<HashMap<String, String>> List_nea = new ArrayList<HashMap<String, String>>(messages.size());
for (Message msg : messages){
des.add(msg.getDescription());// keimeno
text.add(msg.getTitle());// titlos
url.add(msg.getLink());// link
imgl.add(msg.getImgLink());
HashMap<String, String> map = new HashMap<String, String>();
map.put("name", msg.getTitle());
map.put("date", msg.getDate());
List_nea.add(map);
ListAdapter mSchedule = new SimpleAdapter(this, List_nea, R.layout.row,
new String[] {"name", "date"}, new int[] {R.id.TextView01, R.id.TextView02});
this.setListAdapter(mSchedule);
}
AnimationSet set = new AnimationSet(true);
Animation animation = new AlphaAnimation(0.0f, 1.0f);
animation.setDuration(400);
set.addAnimation(animation);
animation = new TranslateAnimation(
Animation.RELATIVE_TO_SELF, 0.0f,Animation.RELATIVE_TO_SELF, 0.0f,
Animation.RELATIVE_TO_SELF, -1.0f,Animation.RELATIVE_TO_SELF, 0.0f
);
animation.setDuration(400);
set.addAnimation(animation);
LayoutAnimationController controller = new LayoutAnimationController(set, 0.5f);
ListView listViewn = getListView();
listViewn.setLayoutAnimation(controller);
}
protected void onListItemClick(ListView l, View v, final int position, long id) {
super.onListItemClick(l, v, position, id);
Dialog dialog = new Dialog(this);
String description = des.get(position).toString().replaceAll("\\<.*?>","");
String imagee=imgl.get(position).toString();
final URL link = url.get(position);
dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
dialog.setContentView(R.layout.single);
dialog.setCancelable(true);
Toast msg = Toast.makeText(nea.this, "The url is : "+imagee, Toast.LENGTH_LONG);
msg.show();
//xrisimopoiisa toast gia na elegxw poio link pernw apo to site
TextView title_dialog = (TextView) dialog.findViewById(R.id.title_dialog);
title_dialog.setText(text.get(position));
TextView text = (TextView) dialog.findViewById(R.id.descr);
text.setText(description);
ImageView image1 = (ImageView) dialog.findViewById(R.id.image1);
try {
//where imageUrl is what you pulled out from the rss feed
Bitmap bitmap = BitmapFactory.decodeStream((InputStream)new URL(imagee).getContent());
image1.setImageBitmap(bitmap);
} catch (MalformedURLException e) {
//log exception here
} catch (IOException e) {
//log exception here
}
Button btnt = (Button) dialog.findViewById(R.id.btnrss);//ti kanei to koumpi otan to patas gia to link
btnt.setOnClickListener(new View.OnClickListener() {
public void onClick (View view) {
Intent viewMessage = new Intent(Intent.ACTION_VIEW, Uri.parse(link.toExternalForm()));
startActivityForResult(viewMessage, 0);
}
});
dialog.show();
}
//options menu
@Override
public boolean onCreateOptionsMenu(Menu menu2) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.menu2, menu2);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.refresh:
new BackgroundAsyncTask_nea().execute();
break;
}
return true;
}
public class BackgroundAsyncTask_nea extends
AsyncTask<Void, Void, Void> {
private ProgressDialog dialog;
int myProgress;
@Override
protected void onPostExecute(Void result) {
displayRss();
dialog.dismiss();
}
@Override
protected void onPreExecute() {
// TODO Auto-generated method stub
dialog = ProgressDialog.show(nea.this, "", "Loading. Please wait...", true);
myProgress = 0;
}
protected void onProgressUpdate(Integer... progress) {
// TODO Auto-generated method stub
//super.onProgressUpdate(values);
dialog.setProgress(progress[0]);
}
@Override
protected Void doInBackground(Void... arg0) {
// TODO Auto-generated method stub
loadFeed(this);
return null;
}
}
public final boolean isInternetOn() {
ConnectivityManager connec = (ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE);
// ARE WE CONNECTED TO THE NET
if (connec.getNetworkInfo(0).getState() == NetworkInfo.State.CONNECTED ||
connec.getNetworkInfo(0).getState() == NetworkInfo.State.CONNECTING ||
connec.getNetworkInfo(1).getState() == NetworkInfo.State.CONNECTING ||
connec.getNetworkInfo(1).getState() == NetworkInfo.State.CONNECTED) {
// MESSAGE TO SCREEN FOR TESTING (IF REQ)
//Toast.makeText(this, connectionType + ” connected”, Toast.LENGTH_SHORT).show();
return true;
} else if (connec.getNetworkInfo(0).getState() == NetworkInfo.State.DISCONNECTED || connec.getNetworkInfo(1).getState() == NetworkInfo.State.DISCONNECTED ) {
//System.out.println(“Not Connected”);
return false;
}
return false;
}
}
मैं इस त्रुटि क्यों मिल रही मैं इसे कैसे हल कर सकते हैं धन्यवाद :)
?संपादित करें:
Public void toast_doInBck(View view) {
// Do something long
Runnable runnable = new Runnable() {
@Override
public void run() {
for (int i = 0; i <= 10; i++) {
Toast.makeText(nea.this,R.string.no_connection, Toast.LENGTH_SHORT).show();
handler.post(new Runnable() {
@Override
public void run() {
}
});
}
}
};
new Thread(runnable).start();
}
EDIT2:
private void loadFeed(AsyncTask<Void, Void, Void> asyncTask){
try{
BaseFeedParser parser = new BaseFeedParser();
messages = parser.parse();
}
catch (Throwable t){
Log.e("OSFP.News",t.getMessage(),t);
Looper.prepare();
Toast.makeText(nea.this, "Παρακαλώ προσπαθήστε αργότερα..",
Toast.LENGTH_SHORT).show();
finish();
Looper.loop();
}
}
क्या आपने संदेश पढ़ा था? 'थ्रेड के अंदर हैंडलर नहीं बना सकता है जिसे Looper.prepare() ' – SLaks
नहीं कहा जाता है हां, मैंने इसे पढ़ा है, लेकिन मुझे नहीं पता कि इसे कैसे हल किया जाए! बस मेरे टोस्ट से पहले Looper.prepare को कॉल करें, और फिर Looper. इसके बाद लूप करें? – user1156210