In Android, you can enter a URL in the address bar to browse the source code of the address page and access the network.

First, implement a simple layout: Copy codeThe Code is as follows: <EditText
Android: id = "@ + id/et_url"
Android: layout_width = "wrap_content"
Android: layout_height = "wrap_content"
Android: layout_alignParentLeft = "true"
Android: layout_alignParentRight = "true"
Android: layout_alignParentTop = "true"
Android: EMS = "10"
Android: text = "@ string/url_text">
<RequestFocus android: layout_width = "match_parent"/>
</EditText>
<Button
Android: id = "@ + id/btn_ie"
Android: layout_width = "wrap_content"
Android: layout_height = "wrap_content"
Android: layout_alignParentLeft = "true"
Android: layout_below = "@ + id/et_url"
Android: onClick = "sendHttp"
Android: text = "@ string/btn_text"/>
<ScrollView
Android: id = "@ + id/sv_id"
Android: layout_width = "match_parent"
Android: layout_height = "match_parent"
Android: layout_below = "@ + id/btn_ie">
<TextView
Android: id = "@ + id/TV _ie"
Android: layout_width = "match_parent"
Android: layout_height = "wrap_content"
Android: text = "@ string/ie_text"/>
</ScrollView>

In StirngCopy codeThe Code is as follows: <string name = "url_text"> http://luochuang.iteye.com/blog/1606231 </string>
<String name = "btn_text"> browse </string>
<String name = "ie_text"> display webpage content </string>

Create a class file:

First, the MainActivity code:Copy codeThe Code is as follows: public class MainActivity extends Activity {
// Declare controls
Public EditText et_url;
Public TextView TV _ie;
// Network Operations
Public NetWorkUtils netWorkUtils;
Private Handler handler;
Public String content;
Public static final int TEXT = 1;
@ Override
Protected void onCreate (Bundle savedInstanceState ){
Super. onCreate (savedInstanceState );
SetContentView (R. layout. activity_main );
// Obtain the et_url object
Et_url = (EditText) findViewById (R. id. et_url );
TV _ie = (TextView) findViewById (R. id. TV _ie );
// Instantiate
NetWorkUtils = new NetWorkUtils (this );
// Instantiate this handler
Handler = new Handler (){
Public void handleMessage (Message msg ){
Super. handleMessage (msg );
Switch (msg. what ){
Case TEXT:
TV _ie.setText (content); // sets the displayed text.
Break;
Default:
Break;
}
}
};
}
@ Override
Public boolean onCreateOptionsMenu (Menu menu ){
// Inflate the menu; this adds items to the action bar if it is present.
GetMenuInflater (). inflate (R. menu. main, menu );
Return true;
}
Public void sendHttp (View v ){
// Set the network
Boolean flag = netWorkUtils. setActiveNetWork ();
If (flag ){
// After the run method is executed, this thread consumes
// Subthread
New Thread (new Runnable (){
@ Override
Public void run (){
Send ();
Handler. sendEmptyMessage (TEXT );
}
}). Start ();
}
}
// Send request operation
@ SuppressLint ("NewApi ")
Public void send (){

// Obtain the path of the url
String path = et_url.getText (). toString ();
If (path. isEmpty ()){
Toast. makeText (MainActivity. this, "the accessed url cannot be blank ",
Toast. LENGTH_LONG). show ();
} Else {
Content = HttpUtils. sendGet (path );
}

/* // Set the network
NetWorkUtils. setActiveNetWork ();
// Obtain the path of the url
String path = et_url.getText (). toString ();
If (path. isEmpty ()){
Toast. makeText (MainActivity. this, "the accessed url cannot be blank ",
Toast. LENGTH_LONG). show ();
} Else {
Try {
// Set the access url
URL url = new URL (path );
// Open the request
HttpURLConnection httpURLConnection = (HttpURLConnection) url
. OpenConnection ();
// Set Request Information
HttpURLConnection. setRequestMethod ("GET ");
// Determine whether the server response is successful
If (httpURLConnection. getResponseCode () = 200 ){
// Obtain the response input stream object
InputStream is = httpURLConnection. getInputStream ();
// Byte output stream
ByteArrayOutputStream bops = new ByteArrayOutputStream ();
// Cache for Data Reading
Byte buffer [] = new byte [1024];
// Read the length record
Int len = 0;
// Read cyclically
While (len = is. read (buffer ))! =-1 ){
Bops. write (buffer, 0, len );
}
// Convert the read content to a byte array
Byte data [] = bops. toByteArray ();
// Convert to a string
Content = new String (data );
} Else {
Toast. makeText (MainActivity. this, "server response error ",
Toast. LENGTH_LONG). show ();
}
} Catch (MalformedURLException e ){
E. printStackTrace ();
} Catch (IOException e ){
E. printStackTrace ();
}
}*/
}
}

Copy codeThe Code is as follows: public class HttpUtils {

Public static String sendGet (String path ){
String content = null;
Try {
// Set the access url
URL url = new URL (path );
// Open the request
HttpURLConnection httpURLConnection = (HttpURLConnection) url
. OpenConnection ();
// Set Request Information
HttpURLConnection. setRequestMethod ("GET ");
// Set whether the request has timed out.
HttpURLConnection. setConnectTimeout (5000 );
// Determine whether the server response is successful
If (httpURLConnection. getResponseCode () = 200 ){
// Obtain the response input stream object
InputStream is = httpURLConnection. getInputStream ();
Byte data [] = StreamTools. isToData (is );
// Convert to a string
Content = new String (data );
// Content Encoding Method
If (content. contains ("gb2312 ")){
Content = new String (data, "gb2312 ");
}
}
// Disconnect
HttpURLConnection. disconnect ();
} Catch (MalformedURLException e ){
E. printStackTrace ();
} Catch (IOException e ){
E. printStackTrace ();
}
Return content;
}
}

Copy codeThe Code is as follows: public class StreamTools {
Public static byte [] isToData (InputStream is) throws IOException {

// Byte output stream
ByteArrayOutputStream bops = new ByteArrayOutputStream ();
// Cache for Data Reading
Byte buffer [] = new byte [1024];
// Read the length record
Int len = 0;
// Read cyclically
While (len = is. read (buffer ))! =-1 ){
Bops. write (buffer, 0, len );
}
// Convert the read content to a byte array
Byte data [] = bops. toByteArray ();

Return data;

}
}

Copy codeThe Code is as follows: public class NetWorkUtils {
Private Context context;
// Network link management object
Public ConnectivityManager connectivityManager;
Public NetWorkUtils (Context context ){
This. context = context;
// Obtain the object of the network link
ConnectivityManager = (ConnectivityManager) context
. GetSystemService (Context. CONNECTIVITY_SERVICE );
}
// Public void setActiveNetWork (){
Public boolean setActiveNetWork (){
Boolean flag = false;
// Obtain available network link objects
NetworkInfo networkInfo = connectivityManager. getActiveNetworkInfo ();
If (networkInfo = null ){
New AlertDialog. Builder (context)
. SetTitle ("Network unavailable ")
. SetMessage ("can I set the network? ")
. SetPositiveButton ("OK ",
New DialogInterface. OnClickListener (){
@ Override
Public void onClick (DialogInterface dialog,
Int which ){
Toast. makeText (context, "click OK ",
Toast. LENGTH_LONG). show ();
// Declare intent
Intent intent = new Intent ();
Intent. setAction (Intent. ACTION_MAIN );
Intent. addCategory ("android. intent. category. LAUNCHER ");
Intent. setComponent (new ComponentName (
"Com. android. settings ",
"Com. android. settings. Settings "));
Intent. setFlags (0x10200000 );
// Execution intent
Context. startActivity (intent );
}
})
. SetNegativeButton ("cancel ",
New DialogInterface. OnClickListener (){
@ Override
Public void onClick (DialogInterface dialog,
Int which ){
}
// Required. show ();
}). Show ();
}
// Determine whether the Network is available
If (networkInfo! = Null ){
Flag = true;
}
Return flag;
}
}

Then add the network access permission to AndroidManifest. xml.Copy codeThe Code is as follows: <uses-permission android: name = "android. permission. ACCESS_NETWORK_STATE"/>
<Uses-permission android: name = "android. permission. INTERNET"/>