Android programming to implement network Picture Viewer and Web page Source Viewer instance _android

This article describes the Android programming implementation of Network Image Viewer and Web page Source viewer. Share to everyone for your reference, specific as follows:

Network Picture Viewer

Manifest to join the network access rights:

<!--access to INTERNET permissions-->
<uses-permission android:name= "Android.permission.INTERNET"/>

The interface is as follows:

Example:

public class Mainactivity extends activity {private EditText ImagePath;
  Private ImageView ImageView;
    @Override public void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate);
    Setcontentview (R.layout.main);
    ImagePath = (edittext) This.findviewbyid (R.id.imagepath);
    ImageView = (ImageView) This.findviewbyid (R.id.imageview);
    Button button = (button) This.findviewbyid (R.id.button); Button.setonclicklistener (New View.onclicklistener () {public void OnClick (View v) {String path = ImagePath
        . GetText (). toString ();
            try{byte[] data = imageservice.getimage (path);//Get Picture data if (data!=null) {//Build Bitmap Object
            Bitmap Bitmap = bitmapfactory.decodebytearray (data, 0, data.length); Imageview.setimagebitmap (bitmap)//Display picture}else{Toast.maketext (Getapplicationcontext (), R.string.erro
          R, 1). Show (); }}catch (Exception e) {Toast.maketext (gEtapplicationcontext (), R.string.error, 1). Show ();
  }
      }
    });

 }
}

 public class ImageService {/** * get picture * @param path network picture paths * @return The byte data of a picture
    */public static byte[] GetImage (String path) throws exception{url url = new URL (path);
    HttpURLConnection conn = (httpurlconnection) url.openconnection ();
    Set timeout time conn.setconnecttimeout (5000);
    Conn.setrequestmethod ("get");
      if (Conn.getresponsecode () ==200) {InputStream instream = Conn.getinputstream ();
      byte[] data = Streamtool.read (instream);
    return data;
  return null; }
}

public class Streamtool {
  /**
   * Read input stream data
   * @param instream
   * @return * * Public
  static byte[] Read (InputStream instream) throws exception{
    bytearrayoutputstream outstream = new Bytearrayoutputstream ();
    byte[] buffer = new byte[1024];
    int len = 0;
    while (len = instream.read (buffer))!=-1) {
      outstream.write (buffer, 0, Len);
    }
    Instream.close ();
    return Outstream.tobytearray ();
  }

Web page Source Viewer

Scroll bars are required if the source of the page exceeds the display position of the screen.

<scrollview
 android:layout_width= "wrap_content"
 android:layout_height= "Wrap_content"
>
<textview
 android:layout_width= "fill_parent"
 android:layout_height= "Wrap_content"
 Android:id= "@+id/htmlsource"
 />
</ScrollView>

The interface is as follows:

Example

 @Override public void OnCreate (Bundle savedinstancestate) {super.oncreate (Savedinsta
   Ncestate);
   Setcontentview (R.layout.main);
   Pathtext = (edittext) This.findviewbyid (R.id.path);
   Htmlsource = (TextView) This.findviewbyid (R.id.htmlsource);
   Button button = (button) This.findviewbyid (R.id.button); Button.setonclicklistener (New View.onclicklistener () {public void OnClick (View v) {String path = Pathtext.gettext (
    ). ToString ();
      try{//Get source code String HTML = pageservice.gethtml (path);
    Htmlsource.settext (HTML);
    }catch (Exception e) {toast.maketext (Getapplicationcontext (), R.string.error, 1). Show ();
}
  }
}); }

public class Pageservice {
  /**
   * Fetch Web page source code
   * @param path Web page Paths
   * @return/public
  static String get Html (String path) throws exception{
    url url = new URL (path);
    HttpURLConnection conn = (httpurlconnection) url.openconnection ();
    Conn.setconnecttimeout (5000);
    Conn.setrequestmethod ("get");
    if (conn.getresponsecode () = =) {
      byte[] data = Streamtool.read (Conn.getinputstream ());
      return new String (data, "UTF-8");
    }
    return null;
  }
}

I hope this article will help you with the Android program.