I am trying to access a website and put the html source code in a TextView. The browser of my emulator works, but I believe that Internet access in my application does not work properly. I think that I may have to use AsyncTask, but I don’t know how to implement it correctly or if I even have to use it. I am very new to programming and have been looking at this site for a while, but I don’t seem to understand it.
This is the main code:
@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); TextView httpTest = (TextView) findViewById(R.id.textView1); GetTest sourceCode = new GetTest(); String returned; try { returned = sourceCode.getInternetData(); httpTest.setText(returned); } catch (Exception e) {
Here is the code that should get the HTML source code:
public class GetTest { public String getInternetData() throws Exception { BufferedReader in = null; String data = null; try { HttpClient client = new DefaultHttpClient(); URI website = new URI( "http://www.yahoo.com"); HttpGet request = new HttpGet(); request.setURI(website); HttpResponse response = client.execute(request); in = new BufferedReader(new InputStreamReader(response.getEntity() .getContent())); StringBuffer sb = new StringBuffer(""); String l = ""; String nl = System.getProperty("line.separator"); while ((l = in.readLine()) != null) { sb.append(l + nl); } in.close(); data = sb.toString(); return data; } finally { if (in != null) { try { in.close(); return data; } catch (Exception e) { e.printStackTrace(); } } } } }
My permissions in the manifest:
<uses-permission android:name="android.permission.INTERNET" />
Finally, here is my logcat:
04-30 02:28:44.368: E/Trace(1095): error opening trace file: No such file or directory (2) 04-30 02:28:45.338: D/dalvikvm(1095): GC_FOR_ALLOC freed 51K, 7% free 2555K/2728K, paused 41ms, total 44ms 04-30 02:28:45.348: I/dalvikvm-heap(1095): Grow heap (frag case) to 3.216MB for 635812-byte allocation 04-30 02:28:45.398: D/dalvikvm(1095): GC_FOR_ALLOC freed 2K, 6% free 3174K/3352K, paused 45ms, total 45ms 04-30 02:28:45.447: D/dalvikvm(1095): GC_CONCURRENT freed <1K, 6% free 3177K/3352K, paused 5ms+4ms, total 57ms 04-30 02:28:45.509: W/System.err(1095): android.os.NetworkOnMainThreadException 04-30 02:28:45.509: W/System.err(1095): at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1117) 04-30 02:28:45.509: W/System.err(1095): at java.net.InetAddress.lookupHostByName(InetAddress.java:385) 04-30 02:28:45.509: W/System.err(1095): at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236) 04-30 02:28:45.509: W/System.err(1095): at java.net.InetAddress.getAllByName(InetAddress.java:214) 04-30 02:28:45.518: W/System.err(1095): at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:137) 04-30 02:28:45.518: W/System.err(1095): at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164) 04-30 02:28:45.518: W/System.err(1095): at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119) 04-30 02:28:45.518: W/System.err(1095): at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360) 04-30 02:28:45.518: W/System.err(1095): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555) 04-30 02:28:45.528: W/System.err(1095): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487) 04-30 02:28:45.528: W/System.err(1095): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465) 04-30 02:28:45.528: W/System.err(1095): at com.example.edittexttest.GetTest.getInternetData(GetTest.java:24) 04-30 02:28:45.528: W/System.err(1095): at com.example.edittexttest.MainActivity.onCreate(MainActivity.java:18) 04-30 02:28:45.528: W/System.err(1095): at android.app.Activity.performCreate(Activity.java:5104) 04-30 02:28:45.528: W/System.err(1095): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080) 04-30 02:28:45.528: W/System.err(1095): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144) 04-30 02:28:45.528: W/System.err(1095): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230) 04-30 02:28:45.528: W/System.err(1095): at android.app.ActivityThread.access$600(ActivityThread.java:141) 04-30 02:28:45.528: W/System.err(1095): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234) 04-30 02:28:45.538: W/System.err(1095): at android.os.Handler.dispatchMessage(Handler.java:99) 04-30 02:28:45.538: W/System.err(1095): at android.os.Looper.loop(Looper.java:137) 04-30 02:28:45.538: W/System.err(1095): at android.app.ActivityThread.main(ActivityThread.java:5041) 04-30 02:28:45.538: W/System.err(1095): at java.lang.reflect.Method.invokeNative(Native Method) 04-30 02:28:45.538: W/System.err(1095): at java.lang.reflect.Method.invoke(Method.java:511) 04-30 02:28:45.538: W/System.err(1095): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 04-30 02:28:45.538: W/System.err(1095): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 04-30 02:28:45.548: W/System.err(1095): at dalvik.system.NativeStart.main(Native Method) 04-30 02:28:45.758: D/gralloc_goldfish(1095): Emulator without GPU emulation detected.
Thanks for the help in the advanced version!
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