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POFollowing Android HTTP Example / Tutorial - Issue Implementing Async Task for Network Activity
 

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  1. POFollowing Android HTTP Example / Tutorial - Issue Implementing Async Task for Network Activity
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    <p>I'm attempting to follow a tutorial regarding posting HTTP data however its force closing on the main thread due to network activity on the IO thread so I've attempted to implement AsyncTask (as suggested by several other helpful SO users - however I've butchered the code and the whole enchilada force closes on me.)</p> <p>: (</p> <p><a href="http://webtutsdepot.com/2011/11/15/android-tutorial-how-to-post-data-from-an-android-app-to-a-website/" rel="nofollow">http://webtutsdepot.com/2011/11/15/android-tutorial-how-to-post-data-from-an-android-app-to-a-website/</a></p> <p>Thanks in advance!</p> <p>NoobNinja</p> <p>JAVA:</p> <pre><code>import java.io.IOException; import org.apache.http.client.ClientProtocolException; import java.util.ArrayList; import android.os.AsyncTask; import java.util.List; import org.apache.http.client.HttpClient; import org.apache.http.client.methods.HttpPost; import org.apache.http.impl.client.DefaultHttpClient; import org.apache.http.NameValuePair; import org.apache.http.client.entity.UrlEncodedFormEntity; import org.apache.http.message.BasicNameValuePair; // import everything you need import android.app.Activity; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.Toast; public class DeviceConfig extends Activity { AsyncTask&lt;Object, Object, Object&gt; saveContactTask = new AsyncTask&lt;Object, Object, Object&gt;() { @Override protected Object doInBackground(Object... params) { return null; } @Override protected void onPostExecute(Object result) { } @Override protected void saveContactTask.execute() { } ; @Override protected Object doInBackground(Object... params) { return null; } Button sendButton; EditText msgTextField; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // load the layout setContentView(R.layout.deviceconfig); // make message text field object msgTextField = (EditText) findViewById(R.id.msgTextField); // make send button object sendButton = (Button) findViewById(R.id.sendButton); } // this is the function that gets called when you click the button public void send(View v); protected void saveContactTask.execute(); // get the message from the message text box String msg = msgTextField.getText().toString(); { // make sure the fields are not empty if (msg.length()&gt;0) { HttpClient httpclient = new DefaultHttpClient(); HttpPost httppost = new HttpPost("http://gamedemo.hostzi.com/test.php"); try { List&lt;NameValuePair&gt; nameValuePairs = new ArrayList&lt;NameValuePair&gt;(2); nameValuePairs.add(new BasicNameValuePair("id", "12345")); nameValuePairs.add(new BasicNameValuePair("message", msg)); httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs)); httpclient.execute(httppost); msgTextField.setText(""); // clear text box } catch (ClientProtocolException e) { // TODO Auto-generated catch block } catch (IOException e) { // TODO Auto-generated catch block } } else { // display message if text fields are empty Toast.makeText(getBaseContext(),"All field are required",Toast.LENGTH_SHORT).show(); } } } </code></pre> <p>XML:</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" &gt; &lt;TextView android:text="Message" android:layout_width="fill_parent" android:layout_height="wrap_content" /&gt; &lt;EditText android:id="@+id/msgTextField" android:layout_width="fill_parent" android:layout_height="wrap_content" /&gt; &lt;Button android:text="Send" android:id="@+id/sendButton" android:layout_width="fill_parent" android:layout_height="wrap_content" android:onClick="send" /&gt; &lt;/LinearLayout&gt; </code></pre> <p>PHP:</p> <pre><code>&lt;?php // get the "message" variable from the post request // this is the data coming from the Android app $message=$_POST["message"]; // specify the file where we will save the contents of the variable message $filename="androidmessages.html"; // write (append) the data to the file file_put_contents($filename,$message."&lt;br /&gt;",FILE_APPEND); // load the contents of the file to a variable $androidmessages=file_get_contents($filename); // display the contents of the variable (which has the contents of the file) echo $androidmessages; ?&gt; </code></pre> <p>LOGCAT:</p> <pre><code> 03-27 16:30:00.775: D/dalvikvm(14566): GC_FOR_ALLOC freed 88K, 3% free 7355K/7568K, paused 36ms, total 36ms 03-27 16:30:00.785: I/dalvikvm-heap(14566): Grow heap (frag case) to 10.818MB for 3686416-byte allocation 03-27 16:30:00.825: D/dalvikvm(14566): GC_FOR_ALLOC freed 1K, 2% free 10953K/11172K, paused 35ms, total 35ms 03-27 16:30:00.845: D/dalvikvm(14566): GC_CONCURRENT freed &lt;1K, 2% free 10953K/11172K, paused 3ms+3ms, total 29ms 03-27 16:30:01.095: D/dalvikvm(14566): GC_FOR_ALLOC freed &lt;1K, 2% free 10953K/11172K, paused 16ms, total 16ms 03-27 16:30:01.105: I/dalvikvm-heap(14566): Grow heap (frag case) to 17.043MB for 6529744-byte allocation 03-27 16:30:01.125: D/dalvikvm(14566): GC_FOR_ALLOC freed 0K, 2% free 17330K/17552K, paused 16ms, total 16ms 03-27 16:30:01.145: D/dalvikvm(14566): GC_CONCURRENT freed 0K, 2% free 17330K/17552K, paused 3ms+3ms, total 23ms 03-27 16:30:01.275: D/libEGL(14566): loaded /system/lib/egl/libEGL_tegra.so 03-27 16:30:01.285: D/libEGL(14566): loaded /system/lib/egl/libGLESv1_CM_tegra.so 03-27 16:30:01.295: D/libEGL(14566): loaded /system/lib/egl/libGLESv2_tegra.so 03-27 16:30:01.325: D/OpenGLRenderer(14566): Enabling debug mode 0 03-27 16:30:03.325: D/AndroidRuntime(14566): Shutting down VM 03-27 16:30:03.325: W/dalvikvm(14566): threadid=1: thread exiting with uncaught exception (group=0x41cd2930) 03-27 16:30:03.325: E/AndroidRuntime(14566): FATAL EXCEPTION: main 03-27 16:30:03.325: E/AndroidRuntime(14566): java.lang.Error: Unresolved compilation problems: 03-27 16:30:03.325: E/AndroidRuntime(14566): Syntax error on token ".", ; expected 03-27 16:30:03.325: E/AndroidRuntime(14566): Syntax error, insert ";" to complete FieldDeclaration 03-27 16:30:03.325: E/AndroidRuntime(14566): Syntax error, insert "}" to complete ClassBody 03-27 16:30:03.325: E/AndroidRuntime(14566): at com.nfc.linkingmanager.DeviceConfig.&lt;init&gt;(DeviceConfig.java:48) 03-27 16:30:03.325: E/AndroidRuntime(14566): at java.lang.Class.newInstanceImpl(Native Method) 03-27 16:30:03.325: E/AndroidRuntime(14566): at java.lang.Class.newInstance(Class.java:1319) 03-27 16:30:03.325: E/AndroidRuntime(14566): at android.app.Instrumentation.newActivity(Instrumentation.java:1054) 03-27 16:30:03.325: E/AndroidRuntime(14566): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2097) 03-27 16:30:03.325: E/AndroidRuntime(14566): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230) 03-27 16:30:03.325: E/AndroidRuntime(14566): at android.app.ActivityThread.access$600(ActivityThread.java:141) 03-27 16:30:03.325: E/AndroidRuntime(14566): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234) 03-27 16:30:03.325: E/AndroidRuntime(14566): at android.os.Handler.dispatchMessage(Handler.java:99) 03-27 16:30:03.325: E/AndroidRuntime(14566): at android.os.Looper.loop(Looper.java:137) 03-27 16:30:03.325: E/AndroidRuntime(14566): at android.app.ActivityThread.main(ActivityThread.java:5041) 03-27 16:30:03.325: E/AndroidRuntime(14566): at java.lang.reflect.Method.invokeNative(Native Method) 03-27 16:30:03.325: E/AndroidRuntime(14566): at java.lang.reflect.Method.invoke(Method.java:511) 03-27 16:30:03.325: E/AndroidRuntime(14566): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 03-27 16:30:03.325: E/AndroidRuntime(14566): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 03-27 16:30:03.325: E/AndroidRuntime(14566): at dalvik.system.NativeStart.main(Native Method) </code></pre>
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    1. CODo you use `LogCat` to generate any logs?
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      1. POFollowing Android HTTP Example / Tutorial - Issue Implementing Async Task for Network Activity
      1. USAnthony Forloney
    2. COYou are trying to perform network operation on UI thread, if you are using android 3.x or more you'll get an exception.
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      1. POFollowing Android HTTP Example / Tutorial - Issue Implementing Async Task for Network Activity
      1. USPragnani
    3. CO@NoobNinja It is not good to update your question, based on the answer..
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