Android uses okhttp (get way) to download pictures _android

First, download the jar package

Https://github.com/square/okhttp

If you use Android Studio you just need to join the dependency compile ' com.squareup.okhttp3:okhttp:3.2.0 '

Second, download a picture and show
It's a hanlder way to use.

Package Com.liunan.okhttpdemo2;
Import Android.graphics.Bitmap;
Import Android.graphics.BitmapFactory;
Import Android.os.Handler;
Import Android.os.Message;
Import android.support.v7.app.AppCompatActivity;
Import Android.os.Bundle;
Import Android.view.View;
Import Android.widget.ImageView;

Import Android.widget.Toast;
Import java.io.IOException;

Import Java.io.InputStream; Import OKHTTP3.
Okhttpclient; Import OKHTTP3.
Request; Import OKHTTP3.
Response; Import OKHTTP3.

Responsebody;
 public class Mainactivity extends Appcompatactivity {private static final int ERROR = 1;
 private static final int SUCCESS = 2;
 Private String URL = "Yun_qi_img/a.jpg";

 Private ImageView MIV;
 @Override protected void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate);
 Setcontentview (R.layout.activity_main);

 Initview (); Private Handler Handler = new Handler () {@Override public void Handlemessage (msg) {switch (msg.what) {C ASE SUCCESS:mIv.setImageBitmAP ((Bitmap) msg.obj);

  Break

   Case ERROR:Toast.makeText (mainactivity.this, "Request Timeout", Toast.length_short). Show ();
  Break

 }
 }
 };
 /** * Initialization component */private void Initview () {miv = (ImageView) Findviewbyid (R.ID.MAIN_IV); /** * Click to get picture/public void Getpic (View v) {new Thread () {@Override public void run () {//Obtain Okhttp object GET request

   , try {okhttpclient client = new Okhttpclient ();

   Get Request Object requests = new Request.builder (). URL (URL). build ();

   Get response Body Responsebody = Client.newcall (Request). Execute ().
   Get stream InputStream in = Body.bytestream ();

   Convert to Bitmap Bitmap Bitmap = Bitmapfactory.decodestream (in);

   Use Hanlder to send messages message msg = Message.obtain ();
   Msg.what = SUCCESS;

   Msg.obj = bitmap;



  Handler.sendmessage (msg);
   catch (IOException e) {e.printstacktrace ();
   Failure message msg = Message.obtain ();

   Msg.what = ERROR;
  Handler.sendmessage (msg);
 }}.start ();

 }


}

You can also write a network request as a tool class,

Package Com.liunan.okhttpdemo2;

Import java.io.IOException;
Import Java.io.InputStream;

Import OKHTTP3. okhttpclient;
Import OKHTTP3. Request;
Import OKHTTP3. Response;

/**
 * Created by Liu Nan on 2016-03-27.
 * * Public
class Okhttputils {

 okhttpclient client = new Okhttpclient ();

 /**
 * Get stream
 * @param URL request address
 * @return input stream
 /public inputstream getinpustream (String URL) Throws IOException {
 //Set requests Request
 = new Request.builder ()
  . URL (URL). build ();


 Gets the row response

 InputStream in = Client.newcall (Request). Execute (). Body (). ByteStream ();

 return in;


 }

 /**
 * Return string *
 @param url
 * @return return string
 * @throws ioexception/public
 string getString (String URL) throws IOException {
 //Set requests Request
 = new Request.builder ()
  . URL (URL). build ();


 Get row response

 Response Response = client.newcall (Request). Execute ();

 Return Response.body (). String ();


 }

}

The above is the entire content of this article, I hope to help you learn, but also hope that we support the cloud habitat community.