Three ways to get network pictures in Android

Getting a network picture in Android is a time-consuming operation if you get direct access to situations where the application's unresponsive (anr:application not responding) dialog box may appear. In this case, the general approach is to use the thread to implement the time-consuming operation. There are three ways to get a URL picture in the following columns:
1. Direct access: (easy: ANR, not recommended)

Mimageview = (ImageView)this = loadimagefromnetwork (image_url); Mimageview.setimagedrawable ( drawable);

Common methods:Privatedrawable loadimagefromnetwork (String imageUrl) {drawable drawable=NULL; Try {  //This can be determined by the file name here, whether the picture is locallydrawable =Drawable.createfromstream (NewURL (IMAGEURL). OpenStream (), "Image.jpg"); } Catch(IOException e) {log.d ("Test", E.getmessage ()); } if(drawable = =NULL) {LOG.D ("Test", "null drawable"); } Else{LOG.D ("Test", "NOT null drawable"); }  returndrawable;}

2. Background thread gets the URL picture:

Mimageview = (ImageView) This. Findviewbyid (r.id.imagethreadconcept);NewThread (NewRunnable () {drawable drawable=loadimagefromnetwork (image_url); @Override Public voidrun () {//post () is especially important to update the image to the main UI thread.Mimageview.post (NewRunnable () {@Override Public voidrun () {//TODO auto-generated Method Stubmimageview.setimagedrawable (drawable);  }}) ; }}). Start ();

3.AsyncTask Get URL Picture

 Mimageview = (ImageView)  new   Downloadimagetask (). Execute (image_url);  private  class  Downloadimagetask extends  asynctask<string, Void, Drawable> { protected   drawable Doinbackground (S  Tring. URLs) { return  loadimagefromnetwork (urls[0]);  protected  void   OnPostExecute (drawable result) {mimageview.setimagedrawable (result); }}

Three ways to get network pictures in Android