come aprire bitmap in galleria in Android

Question

Ciao voglio aprire l'immagine in galleria, sotto è il mio codice

mImageView.setImageBitmap(AppUtil.getBitmapFromFile(obj.getImageUrl(), 200, 200)); 

    mImageView.setOnClickListener(new OnClickListener() { 
     @Override 
     public void onClick(View view) { 
      Intent intent = new Intent(); 
      intent.setAction(Intent.ACTION_VIEW); 
      intent.setDataAndType(Uri.parse(obj.getImageUrl()), "image/*"); 
      startActivity(intent); 
     } 
    }); 

ma la sua mostrando NullPointerException

Uri.parse(obj.getImageUrl() returns below string 

/mnt/sdcard/Immagini/app_images /pro20130429_170323_-1793725321.tmp

aggiornamento: ora ho provato
startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("file://sdcard/Pictures/app_images/pro20130429_170323_-1793725321.tmp"))); e ottenere un errore che

05-03 16:40:18.460: E/AndroidRuntime(4764): android.content.ActivityNotFoundException: No Activity found to handle Intent { act=android.intent.action.VIEW dat=file://sdcard/Pictures/app_images/pro20130429_170323_-1793725321.tmp } 

Answer 1

provare questo

Intent intent = new Intent(); 
intent.setAction(Intent.ACTION_VIEW); 
intent.setDataAndType(Uri.parse("file://" + "/sdcard/Pictures/app_images/pro20130429_170323_-1793725321.tmp"), "image/*"); 
startActivity(intent);