Android downloads network text and android Network text

Android downloads network text and android Network text

Shows the specific interface.

To download a text file from your browser to your mobile phone, follow these steps:

1. Create a project named GetTxtData;

2. Modify the res/layout/fragment_main.xml file. The Code is as follows:

1 <RelativeLayout xmlns: android = "http://schemas.android.com/apk/res/android" 2 xmlns: tools = "http://schemas.android.com/tools" 3 android: layout_width = "match_parent" 4 android: layout_height = "match_parent" 5 android: paddingBottom = "@ dimen/activity_vertical_margin" 6 android: paddingLeft = "@ dimen/users" 7 android: paddingRight = "@ dimen/activity_horizontal_margin" 8 android: paddingTop = "@ dimen/activity_vertical_margin" 9 tools: context = "com. example. gettxtdata. mainActivity $ PlaceholderFragment "> 10 11 <LinearLayout 12 android: layout_width =" fill_parent "13 android: layout_height =" fill_parent "14 android: orientation = "vertical" 15> 16 <EditText 17 android: id = "@ + id/inputText" 18 android: layout_width = "fill_parent" 19 android: layout_height = "wrap_content" 20 android: text = "http://www.sohu.com" 21/> 22 <Button 23 android: layout_width = "wrap_content" 24 android: layout_height = "wrap_content" 25 android: id = "@ + id/getTxtBtn" 26 android: text = "get text" 27/> 28 <ScrollView 29 android: layout_width = "fill_parent" 30 android: layout_height = "fill_parent" 31> 32 <TextView android: layout_width = "fill_parent" 33 android: layout_height = "wrap_content" 34 android: id = "@ + id/sohu" 35/> 36 </ScrollView> 37 </LinearLayout> 38 39 40 </RelativeLayout>View Code

3. Create a new class named NetTool. java, which is mainly for text operations. The method added to the class is as follows:

1 public static String getHtml (String path, String enconding) throws Exception {2 // creates a url Class Object and throws an Exception. 3 URL url = new URL (path ); 4 // obtain the HttpURLConnection object 5 HttpURLConnection conn = (HttpURLConnection) url. openConnection (); 6 conn. setRequestMethod ("GET"); // declares the Request Method 7 conn. setConnectTimeout (6*1000); // set the link timeout to 8 9 if (conn. getResponseCode () = 200) 10 {11 InputStream iStream = conn. getInputStream (); // get the input stream 12 byte [] data = readInstream (iStream); // get the data 13 14 // convert the byte to the String 15 return new String (data, enconding); 16}View Code

4. Modify the MainActivity. java code. The Code is as follows:

1 public class MainActivity extends ActionBarActivity {2 3 @ Override 4 protected void onCreate (Bundle savedInstanceState) {5 super. onCreate (savedInstanceState); 6 setContentView (R. layout. activity_main); 7 8 if (savedInstanceState = null) {9 getSupportFragmentManager (). beginTransaction () 10. add (R. id. container, new PlaceholderFragment ()). commit (); 11} 12} 13 14 @ Override15 public boolean onCreateOptionsMenu (Menu menu) {16 17 // Inflate the menu; this adds items to the action bar if it is present.18 getMenuInflater (). inflate (R. menu. main, menu); 19 return true; 20} 21 22 @ Override23 public boolean onOptionsItemSelected (MenuItem item) {24 // Handle action bar item clicks here. the action bar will25 // automatically handle clicks on the Home/Up button, so long26 // as you specify a parent activity in AndroidManifest. xml.27 int id = item. getItemId (); 28 if (id = R. id. action_settings) {29 return true; 30} 31 return super. onOptionsItemSelected (item); 32} 33 34/** 35 * A placeholder fragment containing a simple view.36 */37 @ TargetApi (Build. 38) public class PlaceholderFragment extends Fragment {39 40 public PlaceholderFragment () {41} 42 43 @ Override44 public View onCreateView (LayoutInflater inflater, ViewGroup container, 45 Bundle savedInstanceState) {46 View rootView = inflater. inflate (R. layout. fragment_main, container, 47 false); 48 StrictMode. setThreadPolicy (new 49 StrictMode. threadPolicy. builder (). detectDiskReads (). detectDiskWrites (). detectNetwork (). penaltyLog (). build (); 50 StrictMode. setVmPolicy (51 new StrictMode. vmPolicy. builder (). detectLeakedSqlLiteObjects (). detectLeakedClosableObjects (). penaltyLog (). penaltyDeath (). build (); 52 53 54 final EditText inputText = (EditText) rootView. findViewById (R. id. inputText); 55 final Button getBtn = (Button) rootView. findViewById (R. id. getTxtBtn); 56 final TextView txtView = (TextView) rootView. findViewById (R. id. sohu); 57 58 getBtn. setOnClickListener (new View. onClickListener () {59 60 @ Override61 public void onClick (View v) {62 // TODO Auto-generated method stub63 String path = inputText. getText (). toString (); 64 try65 {66 String html = NetTool. getHtml (path, "GBK"); 67 txtView. setText (html); 68 69 Toast. makeText (MainActivity. this, 70 "succeeded in obtaining text", Toast. LENGTH_LONG ). show (); 71} catch (Exception e) 72 {73 Toast. makeText (MainActivity. this, 74 "failed to get text", Toast. LENGTH_LONG ). show (); 75 e. printStackTrace (); 76} 77} 78}); 79 return rootView; 80} 81} 82 83}View Code

5. Modify the AndroidManifest. xml code and add the following code after the </application> tag:
<Uses-permission android: name = "android. permission. INTERNET"/>