App crashes on opening activity

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App crashes on opening activity

Postby PatrickStel » Mon Sep 03, 2012 6:40 pm

Hey, I've got a little problem I've created my activity that shows some information in the app.
But every time when I press the button I'm getting a error "Unable to start activity CompomentInfo".

But I can't see why.. in my manifest I call it by name and in my activity I set a setContentView

Can somebody help me with this problem?

Cheers,
Patrick

Code: Select all
<!--From my manifest -->
        <activity android:name="Leesmededeling"
                 android:label="@string/app_name"
                 android:theme="@style/ListFont">
        </activity>
<!--From my manifest -->

package wvv.zondag.app;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import android.app.Activity;
import android.os.Bundle;
import android.text.Html;
import android.util.Log;
import android.widget.LinearLayout;
import android.widget.TextView;

public class Leesmededeling extends Activity{
   /** Called when the activity is first created. */

   TextView txt;
      
   public static final String KEY_121 = "http://www.wvvzondag2.nl/android/leesmededeling.php";
   
   @Override
   public void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.leesmededeling);
      LinearLayout mLinearlayout= (LinearLayout) findViewById(R.id.Linear);
          txt = new TextView(this);
          txt.setText("Connecting...");
          mLinearlayout.addView(txt);

          Runnable postRunnable = new Runnable() {

              @Override
              public void run() {
                  txt.setText(Html.fromHtml(getServerData(KEY_121)));

              }
          };
          txt.post(postRunnable);
   }

   private String getServerData(String returnString) {
      InputStream is = null;

      String result = "";
       //Value from last activity for database
       ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();

       //http post
       try{
               HttpClient httpclient = new DefaultHttpClient();
               HttpPost httppost = new HttpPost(KEY_121);
               httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
               HttpResponse response = httpclient.execute(httppost);
               HttpEntity entity = response.getEntity();
               is = entity.getContent();

       }catch(Exception e){
               Log.e("log_tag", "Error in http connection "+e.toString());
       }

       //convert response to string
       try{
               BufferedReader reader = new BufferedReader(new InputStreamReader(is),8);
               StringBuilder sb = new StringBuilder();
               String line = null;
               while ((line = reader.readLine()) != null) {
                       sb.append(line + "\n");
               }
               is.close();
               result=sb.toString();
       }catch(Exception e){
               Log.e("log_tag", "Error converting result "+e.toString());
       }
       //parse json data
       try{
               JSONArray jArray = new JSONArray(result);
               for(int i=0;i<jArray.length();i++){
                       //JSONObject json_data = jArray.getJSONObject(i);
                       //json_data.getString("introtext");
                       //Get an output to the screen
                       //returnString += jArray.getJSONObject(i);
                       JSONObject arrayElement = jArray.getJSONObject(i);
                       returnString += arrayElement.getString("introtext") + "\n";
               }
               txt.setText(returnString);
       }catch(JSONException e){
               Log.e("log_tag", "Error parsing data "+e.toString());
       }
       return returnString;
   }   

   }
PatrickStel
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Posts: 1
Joined: Mon Sep 03, 2012 6:33 pm

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Re: App crashes on opening activity

Postby SakVong » Wed Sep 05, 2012 6:44 pm

You forgot to put a "." in the Mainifest file android:name=".YourActivity"

Hope this help.
SakVong
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Posts: 3
Joined: Thu Aug 30, 2012 9:09 pm

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