Lancement d'une nouvelle activité via Runnable

Question

Je vérifie si une chaîne est NULL dans un thread, si elle est nulle, le gestionnaire démarre un Runnable qui démarre une nouvelle activité. Tout fonctionne correctement, mais une fois que la nouvelle activité est affichée, elle revient à l'activité appelante et se bloque.

Voici un extrait de code.

if(username==null) 
{ 
    dialogs.dismiss(); 
    handlers.post(new MyRunable()); 
} 

et Runnable est

public class MyRunable implements Runnable 
{ 
    public void run(){ 

    Toast.makeText(ListActivity.this, "Your Connection is too slow",Toast.LENGTH_LONG).show(); 

    startActivity(new Intent(ListActivity.this,Anim.class)); 

    } 
} 

Voici ma source complète

package com.cram; 

    import java.io.File; 
    import java.io.IOException; 

    import javax.xml.parsers.ParserConfigurationException; 

    import org.xml.sax.SAXException; 
    import android.app.Activity; 
    import android.app.AlertDialog; 
    import android.app.ProgressDialog; 
    import android.content.Context; 
    import android.content.DialogInterface; 
    import android.content.DialogInterface.OnClickListener; 
    import android.content.Intent; 
    import android.database.Cursor; 
    import android.graphics.Typeface; 
    import android.net.ConnectivityManager; 
    import android.net.NetworkInfo; 
    import android.os.Bundle; 
    import android.os.Handler; 
    import android.util.Log; 
    import android.widget.ListView; 
    import android.widget.TextView; 
    import android.widget.Toast; 

    public class BuddyListActivity extends Activity 
    { 

     String ss; 
     private static ProgressDialog dialogs,dialog; 
     private Thread downloadThreads; 
     boolean results=false; 
     Context ctx; 
     String[]ddd; 
     ListView lv1; 
     String [] icons; 
     BuddyDbAdapter adapter; 
     NetworkInfo netinfo; 
     Cursor cursor; 
     String values; 
     GetBuddy gb; 
     BuddyDB db; 
     String[] username; 
     String[] firstname; 
     String[] lastname; 
     String[] avatar; 
     String[] id; 
     File[] iconss; 
     Handler handlers; 
     boolean ready=false; 


     @Override 
     public void onCreate(Bundle savedInstanceState) { 
      super.onCreate(savedInstanceState); 
      setContentView(R.layout.buddy); 
      db=new BuddyDB(BuddyListActivity.this); 
      Typeface font = Typeface.createFromAsset(getAssets(),"fonts/Fortheloveofhate.ttf"); 
    TextView btxt = (TextView) findViewById(R.id.textbuddy); 
    btxt.setTypeface(font); 
    ctx=getApplicationContext();  
    lv1=(ListView)findViewById(R.id.list22); 
    netinfo=null; 
    adapter=new BuddyDbAdapter(BuddyListActivity.this); 
    netinfo=checkDataConnection(getApplicationContext()); 
    handlers = new Handler(); 
    adapter.open(); 

    if(netinfo!=null) 
    { 
     downloadThreads = (Thread) getLastNonConfigurationInstance(); 
     if (downloadThreads != null && downloadThreads.isAlive()) { 
     dialog = ProgressDialog.show(this, "Download", "downloading"); 
     } 

     startdownload(); 

    } 




    if(netinfo==null) 
    { 

     cursor=adapter.showBuddy();   
     if (cursor==null||cursor.moveToFirst()==false) 
     { 
      AlertDialog.Builder buddybox = new AlertDialog.Builder(this); 
       buddybox.setMessage("You have No Buddies Yet douche!!"); 
    buddybox.setNeutralButton("Okay", new OnClickListener() { 
        public void onClick(DialogInterface dialog, int which) { 

         startActivity(new Intent(getBaseContext(),Anim.class)); 
        } 
       }); 
       buddybox.setCancelable(false); 
      buddybox.show(); 
    } 
     else 
      { 
      cursor.moveToFirst(); 
      int j=0; 
      ddd=new String[cursor.getCount()]; 
      icons=new String [cursor.getCount()]; 
       do 
       { 
      String firstName = cursor.getString(cursor.getColumnIndex(BuddyDbAdapter.BUDDY_FISTNAME)); 
      String lastname = cursor.getString(cursor.getColumnIndex(BuddyDbAdapter.BUDDY_LASTNAME)); 
      String Avatar = cursor.getString(cursor.getColumnIndex(BuddyDbAdapter.AVATAR)); 
      ddd[j]=firstName+" "+lastname; 
    Log.d("Test", ddd[j]); 
    icons[j]=Avatar; 
    Log.d("Test", icons[j]); 
    j++; 
     }while(cursor.moveToNext()); 


     iconss= new File[icons.length]; 
     Log.d("Test",icons.length+""); 
    for (int q = 0; q < icons.length; q++) { 
     iconss[q] = new File(Download.ROOT +"/"+ icons[q]+".jpg"); 
    Log.d("Test", iconss[q].getAbsolutePath().toString()); 
    } 
    //adapter.close(); 
        lv1.setAdapter(new BuddyAdapter(BuddyListActivity.this,R.layout.list1,ddd,iconss)); 
        onDestroy(); 
       } 



      } 
     } 

    private void box() { 
     // TODO Auto-generated method stub 

    cursor=adapter.showBuddy(); 
    if (cursor==null||cursor.moveToFirst()==false) 
    { 
     dialogs.dismiss(); 
     AlertDialog.Builder buddybox = new AlertDialog.Builder(this); 
      buddybox.setMessage("You have No Buddies Yet ass!!"); 
    buddybox.setNeutralButton("Okay", new OnClickListener() { 
         public void onClick(DialogInterface dialog, int which) { 

          startActivity(new Intent(getBaseContext(),Anim.class)); 
         } 
        }); 
        buddybox.setCancelable(false); 
       buddybox.show(); 

     } 

     } 

     private NetworkInfo checkDataConnection(Context applicationContext) { 
     final ConnectivityManager connMgr = (ConnectivityManager)BuddyListActivity.this.getSystemService(Context.CONNECTIVITY_SERVICE); 
     NetworkInfo networkinfo=null; 
     final android.net.NetworkInfo wifi =connMgr.getNetworkInfo(ConnectivityManager.TYPE_WIFI); 
     final android.net.NetworkInfo mobile =connMgr.getNetworkInfo(ConnectivityManager.TYPE_MOBILE); 
     if(wifi.isConnected()||mobile.isConnected()) 
     {networkinfo=connMgr.getActiveNetworkInfo(); 
     return networkinfo; 
     } 

     else 
     { 
      return null; 
     } 

    } 
     @Override 
     protected void onDestroy() { 
      super.onDestroy(); 
      if (adapter != null) { 
       adapter.close(); 
      } 

     } 

     @Override 
     protected void onStop() 
     { 
      super.onStop(); 
      finish(); 

     } 
     private void startdownload() { 
      dialogs = ProgressDialog.show(BuddyListActivity.this, "Contacting Our Servers", "Geting Your Buddies Avatar"); 
     downloadThreads = new MyThread(); 
     downloadThreads.start(); 

    } 

    public class MyThread extends Thread { 

     @Override 
     public void run() { 
      try { 

       new Thread(); 
       GetBuddy tt=new GetBuddy(); 
       String xml=tt.get(); 
       if(xml==null) 
       { dialogs.dismiss(); 
        handlers.post(new MyRunable()); 
        ready=false; 
        //downloadThreads.suspend(); 

    } 
    final Download cd = new Download(); 
    results = cd.downloadBitmap(); 
    if(results) 
    { 
    BuddyParse bp=new BuddyParse(); 

    try { 

     username=bp.show(xml); 
    //     if(username==null) 
    //     { dialogs.dismiss(); 
    //      handlers.post(new MyRunable()); 
    //      //downloadThreads.suspend(); 
    //     } 
     firstname=bp.firstname(); 
     lastname=bp.lastname(); 
     avatar=bp.avatar(); 
     id=bp.id(); 
     adapter.deleteAll(); 
     ready=true; 
    } 
    catch (ParserConfigurationException e) 
    { 
     e.printStackTrace(); 
    } 
    catch (SAXException e) 
    { 
     e.printStackTrace(); 
    } 
    catch (IOException e) 
    { 
     e.printStackTrace(); 
    } 
    // Log.d("len", username.length+""); 

    for(int k=0; k<username.length;k++) 
    { 
    adapter.insertBuddy(id[k], username[k], firstname[k], lastname[k], avatar[k]); 
    Log.d("Test", id[k]+username[k]+firstname[k]+lastname[k]+avatar[k]+""); 
    } 
    box(); 
    cursor=adapter.showBuddy(); 
    cursor.moveToFirst(); 
    int i=0; 
    ddd=new String[cursor.getCount()]; 
    icons=new String [cursor.getCount()]; 
     do 
     { 
    String firstName = cursor.getString(cursor.getColumnIndex(BuddyDbAdapter.BUDDY_FISTNAME)); 
    String lastname = cursor.getString(cursor.getColumnIndex(BuddyDbAdapter.BUDDY_LASTNAME)); 
    String Avatar = cursor.getString(cursor.getColumnIndex(BuddyDbAdapter.AVATAR)); 
    ddd[i]=firstName+" "+lastname; 
    Log.d("Test", ddd[i]); 
    icons[i]=Avatar; 
    Log.d("Test",icons[i]); 
    i++; 
     }while(cursor.moveToNext()); 


    iconss= new File[avatar.length]; 
    for (int k = 0; k < avatar.length; k++) { 
     iconss[k] = new File(Download.ROOT+"/"+avatar[k]+".jpg"); 

    Log.d("Test", iconss[k].getAbsolutePath()+"thread"); 
    //Log.d("Test", ddd[k]); 
      } 

     if (results&&ready) 
      { 
      dialogs.dismiss(); 
      handlers.post(new MyRuns()); 

      } 
    } 
    //    else 
    //    { dialogs.dismiss(); 
    //     handlers.post(new MyRunable()); 
    //     
    //    } 
      }finally { 

      } 

     } 


    } 

    public class MyRuns implements Runnable { 
     public void run() { 
      ready=true; 
      lv1.setAdapter(new BuddyAdapter(ctx,R.layout.list1,ddd,iconss)); 
      onDestroy(); 
     } 
    } 
    public class MyRunable implements Runnable { 
     public void run() { 
      //Toast.makeText(BuddyListActivity.this, "Your Connection is too slow", Toast.LENGTH_LONG).show(); 
       startActivity(new Intent(BuddyListActivity.this,Anim.class)); 


      } 
     } 
    } 

Answer 1

Réglage RETURN dans le bloc et la mise en try catch android:noHistory="true" dans Android Manifest pour toutes les activités fixe mon problème

Answer 2

utiliser thread principal pour démarrer votre filets.Vérifier runOnUiThread (action Runnable)

Answer 3

Si vous essayez pour créer une tâche asynchrone dans un thread différent, je vous recommande d'utiliser la classe suivante:

private final class MyRunnable extends 
      AsyncTask<Void, Void, Document> { 
     protected Document doInBackground(Void... params) { 

     } 

     protected void onPostExecute(Document result) { 

     } 
    } 

Il vous suffit de modifier les paramètres.

Plus d'infos ici: http://developer.android.com/reference/android/os/AsyncTask.html

Answer 4

Terminez votre activité actuelle lors du démarrage une autre activité de runnable.