Android Development: Smartimageview Simple Implementation and application

The picture that is usually obtained from the server side is the URL address, if simply get the picture through the URL address?

There is an open source project: Smartimageview, do this function, while there are other features, download inconvenience, too large

This simple function of implementing it yourself here

Code:

 PackageOrg.dreamtech.smartimageview;ImportJava.io.InputStream;Importjava.net.HttpURLConnection;ImportJava.net.URL;ImportAndroid.annotation.SuppressLint;ImportAndroid.content.Context;ImportAndroid.graphics.Bitmap;Importandroid.graphics.BitmapFactory;ImportAndroid.os.Handler;ImportAndroid.os.Message;ImportAndroid.util.AttributeSet;ImportAndroid.widget.ImageView; Public classMysmartimageviewextendsImageView {protected Static Final intrequestsuccess = 1; protected Static Final intRequestfail = 2; protected Static Final intERROR = 3; @SuppressLint ("Handlerleak")    PrivateHandler Handler =NewHandler () { Public voidhandlemessage (android.os.Message msg) {Switch(msg.what) { CaseRequestsuccess:bitmap Bitmap=(Bitmap) msg.obj; Mysmartimageview. This. Setimagebitmap (bitmap);  Break;  CaseRequestfail:intDefault_resource =(Integer) msg.obj; Mysmartimageview. This. Setbackgroundresource (Default_resource);  Break;  CaseERROR:intResource =(Integer) msg.obj; Mysmartimageview. This. Setbackgroundresource (Resource);  Break;    }        };    }; //The construction methods of the parent class     PublicMysmartimageview (context context, AttributeSet attrs,intDefstyle) {        Super(context, attrs, Defstyle); }     PublicMysmartimageview (Context context, AttributeSet attrs) {Super(context, attrs); }     PublicMysmartimageview (Context context) {Super(context); }    //A method of displaying pictures//path:the parameters of URL transmission     Public voidSetimageurl (FinalString Path) {        NewThread () { Public voidrun () {Try{URL URL=NewURL (path); HttpURLConnection Conn=(httpurlconnection) URL. OpenConnection (); Conn.setrequestmethod ("GET"); Conn.setconnecttimeout (5000); intCode =Conn.getresponsecode (); if(Code = = 200) {InputStream in=Conn.getinputstream (); Bitmap Bitmap=Bitmapfactory.decodestream (in); Message msg=Message.obtain (); Msg.obj=bitmap;                    Handler.sendmessage (msg); }                } Catch(Exception e) {e.printstacktrace ();        }            };    }.start (); }    //A method of displaying pictures (overloading method)//path:the parameters of URL transmission//Resource:default Resources (If You can ' t find a resource through this URL)     Public voidSetimageurl (FinalString Path,Final intResource) {        NewThread () { Public voidrun () {Try{URL URL=NewURL (path); HttpURLConnection Conn=(httpurlconnection) URL. OpenConnection (); Conn.setrequestmethod ("GET"); Conn.setconnecttimeout (5000); intCode =Conn.getresponsecode (); if(Code = = 200) {InputStream in=Conn.getinputstream (); Bitmap Bitmap=Bitmapfactory.decodestream (in); Message msg=Message.obtain (); Msg.what=requestsuccess; Msg.obj=bitmap;                    Handler.sendmessage (msg); } Else{Message msg=Message.obtain (); Msg.what=Requestfail; Msg.obj=resource;                    Handler.sendmessage (msg); }                } Catch(Exception e) {Message msg=Message.obtain (); Msg.what=ERROR; Msg.obj=resource;                Handler.sendmessage (msg);        }            };    }.start (); }}

Two overloaded methods:

1: Clear URL address is correct, not error, call directly

2: Prevent image URL error, set default resource, pass two parameters

Under test:

 PackageOrg.dreamtech.smartimageview;ImportAndroid.os.Bundle;Importandroid.app.Activity;ImportAndroid.view.Menu; Public classMainactivityextendsActivity {@Overrideprotected voidonCreate (Bundle savedinstancestate) {Super. OnCreate (savedinstancestate);        Setcontentview (R.layout.activity_main); Mysmartimageview IV=(Mysmartimageview) Findviewbyid (R.ID.IV); Iv.setimageurl ("Http://fanyi.bdstatic.com/static/translation/img/header/logo_cbfea26.png", R.drawable.default_ic); }}

Layout:

<Relativelayoutxmlns: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"Android:paddingbottom= "@dimen/activity_vertical_margin"Android:paddingleft= "@dimen/activity_horizontal_margin"Android:paddingright= "@dimen/activity_horizontal_margin"Android:paddingtop= "@dimen/activity_vertical_margin"Tools:context=". Mainactivity " >    <Org.dreamtech.smartimageview.MySmartImageViewAndroid:id= "@+id/iv"Android:layout_width= "Wrap_content"Android:layout_height= "Wrap_content"         /></Relativelayout>

Here is a correct URL address, the result is as follows:

Next, I changed the URL address to the wrong:

Results:

All right, done!

Android Development: Smartimageview Simple Implementation and application