Android---Using android-async-http Open source project to implement network picture Viewer

1. Guide Package: Import the latest version of the android-async-http Open Source project Package

2. Simple to build a Web Image Viewer interface

The relevant interface building code:

<relativelayout xmlns:android= "http://schemas.android.com/apk/res/android" xmlns:tools= "http// Schemas.android.com/tools "android:layout_width=" match_parent "android:layout_height=" Match_parent "Tools:context = "${packagename}.${activityclass}" > <imageview android:id= "@+id/iv_img" android:layout_width= "wrap _content "android:layout_height=" 300DP "android:layout_alignparentleft=" true "Android:layout_alignpar Entright= "true" android:layout_alignparenttop= "true" android:src= "@drawable/ic_launcher"/> <editte        XT android:id= "@+id/et_url" android:layout_width= "match_parent" android:layout_height= "Wrap_content" Android:layout_alignparentbottom= "true" android:layout_alignparentleft= "true" Android:layout_marginbo Ttom= "60DP" android:inputtype= "Texturi" android:text= "@string/et_url"/> <button android:id= " @+id/btn_img "Android:layout_width=" MaTch_parent "android:layout_height=" Wrap_content "android:layout_alignparentbottom=" true "Android:layo Ut_alignparentleft= "true" android:onclick= "sendgetimg" android:text= "@string/btn_img"/></relativelayo Ut>

This is just a way to use an absolute layout, or to lay out a relative layout.

3. Set Network permissions

<uses-permission android:name= "Android.permission.INTERNET"/>

4. Creating an Asynchronous client object

5. Get the URI network path

6. Execute a GET request

a) if the factory object is created successfully

b) The Decodebytearray of the factory object converts bytes into bitmap objects

c) set the picture

7. Project Analysis:

Click on the Web image to view a picture of the address you have filled out.

Related program code:

Package Www.csdn.net.lesson05_02;import Org.apache.http.header;import Android.app.activity;import Android.graphics.bitmap;import Android.graphics.bitmapfactory;import Android.os.bundle;import Android.view.View; Import Android.widget.edittext;import Android.widget.imageview;import Android.widget.toast;import Com.loopj.android.http.asynchttpclient;import Com.loopj.android.http.asynchttpresponsehandler;public Class Mainactivity extends Activity {private EditText et_url;private ImageView iv_img; @Overrideprotected void OnCreate (Bundle Savedinstancestate) {super.oncreate (savedinstancestate); Setcontentview (R.layout.activity_main); Et_url= (EditText ) Findviewbyid (R.id.et_url); iv_img= (ImageView) Findviewbyid (r.id.iv_img);} public void sendgetimg (View v) {int id=v.getid (), switch (ID) {Case r.id.btn_img://gets the network path string Url=et_url.gettext (). ToString ();//Create client Object Asynchttpclient client=new asynchttpclient (); Client.get (URL, new Asynchttpresponsehandler () {@ overridepublic void onsuccess (int statusCode, header[] headers, byte[] responsebody) {if (statuscode==200) {bitmapfactory factory=new bitmapfactory (); Bitmap Bitmap=factory.decodebytearray (responsebody, 0, responsebody.length); Iv_img.setimagebitmap (Bitmap);}} @Overridepublic void onfailure (int statusCode, header[] headers,byte[] responsebody, throwable error) { Error.printstacktrace ();}}); Break;default:break;}}}