Use Rxjava+retrofit for data requests and place them in Recycleview to load pictures using fresco

The first is dependency:

Compile'com.squareup.retrofit2:retrofit:2.0.1'Compile'com.squareup.retrofit2:converter-gson:2.0.1'Compile'com.squareup.retrofit2:adapter-rxjava:2.0.1'Compile'io.reactivex:rxandroid:1.1.0'Compile'com.squareup.okhttp3:logging-interceptor:3.4.1'Compile'com.android.support:mediarouter-v7:25.0.0'Compile'com.android.support:recyclerview-v7:25.0.0'Compile'com.nostra13.universalimageloader:universal-image-loader:1.9.5'Compile'com.facebook.fresco:fresco:0.14.1'Compile'com.facebook.fresco:animated-base-support:0.14.1'Compile'com.facebook.fresco:animated-gif:0.14.1'Compile'com.facebook.fresco:webpsupport:0.14.1'Compile'com.facebook.fresco:animated-webp:0.14.1'Compile'com.facebook.fresco:imagepipeline-okhttp3:0.14.1'

Then the permissions:

<uses-permission android:name="android.permission.INTERNET"></ uses-permission>    <uses-permission android:name="Android.permission.READ_EXTERNAL_STORAGE  "></uses-permission>    <uses-permission android:name="  Android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission>    < Uses-permission android:name="android.permission.ACCESS_NETWORK_STATE">< /uses-permission>

Then you need to define a Apiservice interface (get inside write classification recognition):

@GET ("type/1/p/1")    Observable<Home> gethomes ();

Then is the Homeadapter class (this is the Recycleview adapter, if not understand, you can find my essay OH)

 Public classHomeadapter extends Recyclerview.adapter{List<Home.DataBean>Mdatas;    Context context;  PublicHomeadapter (listMdatas, Context context) {         This. Mdatas =Mdatas;  This. Context =context; } @Override PublicMyviewholder Oncreateviewholder (viewgroup parent,intViewType) {Myviewholder Holder=NewMyviewholder (Layoutinflater. from(context). Inflate (R.layout.item_home, parent,false)); returnHolder; } @Override Public intGetItemCount () {returnmdatas.size (); }    classMyviewholder extends Recyclerview.viewholder {TextView TV;        Simpledraweeview img;  PublicMyviewholder (view view) {super (view); TV=(TextView) View.findviewbyid (r.id.id_num); IMG=(Simpledraweeview) View.findviewbyid (R.id.main_simple_drawee_view); }    }     Public InterfaceOnitemclicklitener {voidOnitemclick (View view,intposition); voidOnitemlongclick (View view,intposition); }    PrivateOnitemclicklitener Monitemclicklitener;  Public voidSetonitemclicklitener (Onitemclicklitener monitemclicklitener) { This. Monitemclicklitener =Monitemclicklitener; } @Override Public voidOnbindviewholder (final Myviewholder holder, finalintposition) {Holder.tv.setText (mdatas).Get(position). Getnews_title ()); String URL= Mdatas.Get(position). Getpic_url (); if(Url.equals ("")|| url==NULL) {Holder.img.setImageResource (r.mipmap.ic_launcher); }Else{URI Uri=uri.parse (URL); Draweecontroller Controller=Fresco.newdraweecontrollerbuilder (). Seturi (URI). Setautoplayanimations (true). build ();        Holder.img.setController (Controller); }        //Set the Click event if a callback is set        if(Monitemclicklitener! =NULL) {Holder.itemView.setOnClickListener (NewView.onclicklistener () {@Override Public voidOnClick (View v) {intpos =holder.getlayoutposition ();                Monitemclicklitener.onitemclick (Holder.itemview, POS);            }            }); Holder.itemView.setOnLongClickListener (NewView.onlongclicklistener () {@Override Publicboolean Onlongclick (View v) {intpos =holder.getlayoutposition ();                    Monitemclicklitener.onitemlongclick (Holder.itemview, POS); return false;        }            }); }    }}

Put your interface in the API:

 Public class API {    publicstatic final String home_url="http://api.expoon.com/ appnews/getnewslist/";}

Mainactivity

 Public classMainactivity extends Appcompatactivity {Recyclerview mrecyclerview; @Overrideprotected voidonCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate);        Setcontentview (R.layout.activity_main); Mrecyclerview=(Recyclerview) Findviewbyid (R.id.id_recyclerview); Mrecyclerview.setlayoutmanager (NewLinearlayoutmanager ( This)); Mrecyclerview.setitemanimator (Newdefaultitemanimator ());    Getmadata (); }     Public voidGetmadata () {Retrofit Retrofit=NewRetrofit.builder (). BASEURL (API. Home_url). Addconverterfactory (Gsonconverterfactory.create ()). Addcalladapterfactory (        Rxjavacalladapterfactory.create ()). build (); Apiservice Apiservice= Retrofit.create (Apiservice.class); Observable<Home> Homes =Apiservice.gethomes (); Homes.subscribeon (Schedulers.io ()). Observeon (Androidschedulers.mainthread ()). Subscribe (NewObserver() {@Override Public voidoncompleted () {} @Override Public voidOnError (Throwable e) {} @Override Public voidOnNext (home home) {List<Home.DataBean> data =Home.getdata (); Mrecyclerview.setadapter (NewHomeadapter (data,mainactivity. This));    }                }); }}

 myapp configuration fresco: 
  
 

 public  class   MyApp extends application { public  static   MyApp minstance; @Override  public  void   OnCreate () {super.oncreate ();        Fresco.initialize ( this   = this  ;   " public   Static   MyApp getinstance () { return      minstance; }}

The

is then the layout, first the main layout (write the Recycleview):

 <android.support.v7.widget.recyclerview android:id  ="  @+id/id_recyclerview    Android:divider  = "  #ffff0000  "   Android: Dividerheight  = " 10DP  "   android:layout_width  = "  match_parent   "  android:layout_height  = " match_parent  " /> 

And then you need an entry layout item_home:

<Com.facebook.drawee.view.SimpleDraweeView android:layout_width="100DP"Android:layout_height="100DP"fresco:roundascircle="true"Fresco:roundingbordercolor="@android: Color/holo_blue_light"Fresco:roundingborderwidth="5DP"Android:id="@+id/main_simple_drawee_view"Fresco:placeholderimage="@mipmap/ic_launcher"/> <TextView Android:id="@+id/id_num"Android:layout_below="@id/main_simple_drawee_view"Android:layout_width="match_parent"Android:layout_height="wrap_content"android:gravity="Center"Android:text="1"/>

So it's written.

Use Rxjava+retrofit for data requests and place them in Recycleview to load pictures using fresco