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POMaking a Http Request in Android
 

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  1. POMaking a Http Request in Android
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    <p>I'm trying to make a simple <code>http</code> request with Android, but the application crashes at run time. The error occurs at:</p> <pre><code>HttpResponse rp= hc.execute(post); </code></pre> <p>I thought it may be because of a missing internet permission but adding:</p> <pre><code> &lt;uses-permission android:name="android.permission.INTERNET" /&gt; </code></pre> <p>did not work. </p> <p>This is the piece of code which I have used:</p> <pre><code>public class Http_requestActivity extends Activity { /** Called when the activity is first created. */ private String getPage() { String str = "***"; try { HttpClient hc = new DefaultHttpClient(); HttpPost post = new HttpPost("http://www.yahoo.com"); HttpResponse rp = hc.execute(post); if (rp.getStatusLine().getStatusCode() == HttpStatus.SC_OK) { str = EntityUtils.toString(rp.getEntity()); } } catch(IOException e) { e.printStackTrace(); } return str; } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); TextView txt = (TextView)findViewById(R.id.textView1); txt.setText(this.getPage()); } } </code></pre> <p>log file:</p> <pre><code>06-19 09:04:47.277: E/AndroidRuntime(2213): FATAL EXCEPTION: main 06-19 09:04:47.277: E/AndroidRuntime(2213): android.os.NetworkOnMainThreadException 06-19 09:04:47.277: E/AndroidRuntime(2213): at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1099) 06-19 09:04:47.277: E/AndroidRuntime(2213): at java.net.InetAddress.lookupHostByName(InetAddress.java:391) 06-19 09:04:47.277: E/AndroidRuntime(2213): at java.net.InetAddress.getAllByNameImpl(InetAddress.java:242) 06-19 09:04:47.277: E/AndroidRuntime(2213): at java.net.InetAddress.getAllByName(InetAddress.java:220) 06-19 09:04:47.277: E/AndroidRuntime(2213): at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:137) 06-19 09:04:47.277: E/AndroidRuntime(2213): at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164) 06-19 09:04:47.277: E/AndroidRuntime(2213): at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119) 06-19 09:04:47.277: E/AndroidRuntime(2213): at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360) 06-19 09:04:47.277: E/AndroidRuntime(2213): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555) 06-19 09:04:47.277: E/AndroidRuntime(2213): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487) 06-19 09:04:47.277: E/AndroidRuntime(2213): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465) 06-19 09:04:47.277: E/AndroidRuntime(2213): at com.exatech.httprequest.Http_requestActivity.getPage(Http_requestActivity.java:99) 06-19 09:04:47.277: E/AndroidRuntime(2213): at com.exatech.httprequest.Http_requestActivity.access$0(Http_requestActivity.java:91) 06-19 09:04:47.277: E/AndroidRuntime(2213): at com.exatech.httprequest.Http_requestActivity$1.onClick(Http_requestActivity.java:123) 06-19 09:04:47.277: E/AndroidRuntime(2213): at android.view.View.performClick(View.java:3511) 06-19 09:04:47.277: E/AndroidRuntime(2213): at android.view.View$PerformClick.run(View.java:14105) 06-19 09:04:47.277: E/AndroidRuntime(2213): at android.os.Handler.handleCallback(Handler.java:605) 06-19 09:04:47.277: E/AndroidRuntime(2213): at android.os.Handler.dispatchMessage(Handler.java:92) 06-19 09:04:47.277: E/AndroidRuntime(2213): at android.os.Looper.loop(Looper.java:137) 06-19 09:04:47.277: E/AndroidRuntime(2213): at android.app.ActivityThread.main(ActivityThread.java:4424) 06-19 09:04:47.277: E/AndroidRuntime(2213): at java.lang.reflect.Method.invokeNative(Native Method) 06-19 09:04:47.277: E/AndroidRuntime(2213): at java.lang.reflect.Method.invoke(Method.java:511) 06-19 09:04:47.277: E/AndroidRuntime(2213): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) 06-19 09:04:47.277: E/AndroidRuntime(2213): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 06-19 09:04:47.277: E/AndroidRuntime(2213): at dalvik.system.NativeStart.main(Native Method) </code></pre>
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    1. COpost your logcat
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    2. COYou should not do the networking work in UI thread.......Please use other thread or Async task for it.... it may cause android.os.NetworkOnMainThreadException
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      1. USDheeresh Singh
    3. COJust copy & paste your code into mine. It works fine. Try clean & build your project. Also make sure textView1 does exists in main.xml
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      1. USRobGThai
 

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