Error Fatal Exception: main

103-28 11:06:07.926: E/AndroidRuntime(7828): FATAL EXCEPTION: main
203-28 11:06:07.926: E/AndroidRuntime(7828): java.lang.RuntimeException: Unable to start activity ComponentInfo{de.sturmfrai.gefahrenbeurteilung/de.sturmfrai.gefahrenbeurteilung.NeuerPrueferActivity}: java.lang.ClassCastException: android.widget.ImageButton cannot be cast to android.widget.Button
303-28 11:06:07.926: E/AndroidRuntime(7828): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1968)
403-28 11:06:07.926: E/AndroidRuntime(7828): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1993)
503-28 11:06:07.926: E/AndroidRuntime(7828): at android.app.ActivityThread.access$600(ActivityThread.java:127)
603-28 11:06:07.926: E/AndroidRuntime(7828): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1159)
703-28 11:06:07.926: E/AndroidRuntime(7828): at android.os.Handler.dispatchMessage(Handler.java:99)
803-28 11:06:07.926: E/AndroidRuntime(7828): at android.os.Looper.loop(Looper.java:137)
903-28 11:06:07.926: E/AndroidRuntime(7828): at android.app.ActivityThread.main(ActivityThread.java:4507)
1003-28 11:06:07.926: E/AndroidRuntime(7828): at java.lang.reflect.Method.invokeNative(Native Method)
1103-28 11:06:07.926: E/AndroidRuntime(7828): at java.lang.reflect.Method.invoke(Method.java:511)
1203-28 11:06:07.926: E/AndroidRuntime(7828): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:978)
1303-28 11:06:07.926: E/AndroidRuntime(7828): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:745)
1403-28 11:06:07.926: E/AndroidRuntime(7828): at dalvik.system.NativeStart.main(Native Method)
1503-28 11:06:07.926: E/AndroidRuntime(7828): Caused by: java.lang.ClassCastException: android.widget.ImageButton cannot be cast to android.widget.Button
1603-28 11:06:07.926: E/AndroidRuntime(7828): at de.sturmfrai.gefahrenbeurteilung.NeuerPrueferActivity.onCreate(NeuerPrueferActivity.java:53)
1703-28 11:06:07.926: E/AndroidRuntime(7828): at android.app.Activity.performCreate(Activity.java:4469)
1803-28 11:06:07.926: E/AndroidRuntime(7828): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1052)
1903-28 11:06:07.926: E/AndroidRuntime(7828): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1932)
2003-28 11:06:07.926: E/AndroidRuntime(7828): ... 11 more

1package de.sturmfrai.gefahrenbeurteilung;
2
3import android.app.Activity;
4import android.content.Intent;
5import android.os.Bundle;
6import android.view.View;
7import java.util.ArrayList;
8import java.util.List;
9
10import org.apache.http.NameValuePair;
11import org.apache.http.message.BasicNameValuePair;
12import org.json.JSONException;
13import org.json.JSONObject;
14
15import android.app.Activity;
16import android.app.ProgressDialog;
17import android.content.Intent;
18import android.os.AsyncTask;
19import android.os.Bundle;
20import android.util.Log;
21import android.view.View;
22import android.widget.Button;
23import android.widget.EditText;
24
25public class NeuerPrueferActivity extends Activity {
26
27 // Progress Dialog
28 private ProgressDialog pDialog;
29
30 JSONParser jsonParser = new JSONParser();
31 EditText txt_name;
32 EditText txt_vorname;
33 EditText txt_firma;
34 EditText txt_pruefernummer;
35
36 // url to create new product
37 private static String url_create_product = "Severadresse und so richtig eingebebn aber Forum lässt mich das nicht so posten";
38
39 // JSON Node names
40 private static final String TAG_SUCCESS = "success";
41
42 @Override
43 public void onCreate(Bundle savedInstanceState) {
44 super.onCreate(savedInstanceState);
45 setContentView(R.layout.activity_neuer_pruefer);
46
47 // Edit Text
48 txt_name = (EditText) findViewById(R.id.txt_name);
49 txt_vorname = (EditText) findViewById(R.id.txt_vorname);
50 txt_firma = (EditText) findViewById(R.id.txt_firma);
51 txt_pruefernummer = (EditText) findViewById(R.id.txt_pruefernummer);
52 // Create button
53 Button btnwahl = (Button) findViewById(R.id.btn_weiter_wahl);
54
55 // button click event
56 btnwahl.setOnClickListener(new View.OnClickListener() {
57
58 @Override
59 public void onClick(View view) {
60 // creating new product in background thread
61 new Hintergrund().execute();
62 }
63 });
64 }
65
66 /**
67 * Background Async Task to Create new product
68 * */
69 class Hintergrund extends AsyncTask<String, String, String> {
70
71 /**
72 * Before starting background thread Show Progress Dialog
73 * */
74 @Override
75 protected void onPreExecute() {
76 super.onPreExecute();
77 pDialog = new ProgressDialog(NeuerPrueferActivity.this);
78 pDialog.setMessage("Prüfer wird eingetragen");
79 pDialog.setIndeterminate(false);
80 pDialog.setCancelable(true);
81 pDialog.show();
82 }
83
84 /**
85 * Creating product
86 * */
87 protected String doInBackground(String... args) {
88 String name = txt_name.getText().toString();
89 String vorname = txt_vorname.getText().toString();
90 String firma = txt_firma.getText().toString();
91 String pruefernummer = txt_pruefernummer.getText().toString();
92
93 // Building Parameters
94 List<NameValuePair> params = new ArrayList<NameValuePair>();
95 params.add(new BasicNameValuePair("name", name));
96 params.add(new BasicNameValuePair("vorname", vorname));
97 params.add(new BasicNameValuePair("firma", firma));
98 params.add(new BasicNameValuePair("pruefernummer", pruefernummer));
99
100 // getting JSON Object
101 // Note that create product url accepts POST method
102 JSONObject json = jsonParser.makeHttpRequest(url_create_product,
103 "POST", params);
104
105 // check log cat fro response
106 Log.d("Create Response", json.toString());
107
108 // check for success tag
109 try {
110 int success = json.getInt(TAG_SUCCESS);
111
112 if (success == 1) {
113 // successfully created product
114 Intent i = new Intent(getApplicationContext(), AuswahlEinzelSystemActivity.class);
115 startActivity(i);
116
117 // closing this screen
118 finish();
119 } else {
120 // failed to create product
121 }
122 } catch (JSONException e) {
123 e.printStackTrace();
124 }
125
126 return null;
127 }
128
129 /**
130 * After completing background task Dismiss the progress dialog
131 * **/
132 protected void onPostExecute(String file_url) {
133 // dismiss the dialog once done
134 pDialog.dismiss();
135 }
136
137 }
138
139
140}

103-28 11:31:49.336: E/AndroidRuntime(9863): FATAL EXCEPTION: AsyncTask #1
203-28 11:31:49.336: E/AndroidRuntime(9863): java.lang.RuntimeException: An error occured while executing doInBackground()
303-28 11:31:49.336: E/AndroidRuntime(9863): at android.os.AsyncTask$3.done(AsyncTask.java:278)
403-28 11:31:49.336: E/AndroidRuntime(9863): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273)
503-28 11:31:49.336: E/AndroidRuntime(9863): at java.util.concurrent.FutureTask.setException(FutureTask.java:124)
603-28 11:31:49.336: E/AndroidRuntime(9863): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307)
703-28 11:31:49.336: E/AndroidRuntime(9863): at java.util.concurrent.FutureTask.run(FutureTask.java:137)
803-28 11:31:49.336: E/AndroidRuntime(9863): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:208)
903-28 11:31:49.336: E/AndroidRuntime(9863): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
1003-28 11:31:49.336: E/AndroidRuntime(9863): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
1103-28 11:31:49.336: E/AndroidRuntime(9863): at java.lang.Thread.run(Thread.java:856)
1203-28 11:31:49.336: E/AndroidRuntime(9863): Caused by: java.lang.IllegalArgumentException: Host name may not be null
1303-28 11:31:49.336: E/AndroidRuntime(9863): at org.apache.http.HttpHost.<init>(HttpHost.java:83)
1403-28 11:31:49.336: E/AndroidRuntime(9863): at org.apache.http.impl.client.AbstractHttpClient.determineTarget(AbstractHttpClient.java:497)
1503-28 11:31:49.336: E/AndroidRuntime(9863): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
1603-28 11:31:49.336: E/AndroidRuntime(9863): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)
1703-28 11:31:49.336: E/AndroidRuntime(9863): at de.sturmfrai.gefahrenbeurteilung.JSONParser.makeHttpRequest(JSONParser.java:51)
1803-28 11:31:49.336: E/AndroidRuntime(9863): at de.sturmfrai.gefahrenbeurteilung.NeuerPrueferActivity$Hintergrund.doInBackground(NeuerPrueferActivity.java:106)
1903-28 11:31:49.336: E/AndroidRuntime(9863): at de.sturmfrai.gefahrenbeurteilung.NeuerPrueferActivity$Hintergrund.doInBackground(NeuerPrueferActivity.java:1)
2003-28 11:31:49.336: E/AndroidRuntime(9863): at android.os.AsyncTask$2.call(AsyncTask.java:264)
2103-28 11:31:49.336: E/AndroidRuntime(9863): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
2203-28 11:31:49.336: E/AndroidRuntime(9863): ... 5 more
2303-28 11:31:56.766: D/OpenGLRenderer(9863): Flushing caches (mode 0)
2403-28 11:31:56.766: D/OpenGLRenderer(9863): Flushing caches (mode 0)
2503-28 11:31:57.066: E/WindowManager(9863): Activity de.sturmfrai.gefahrenbeurteilung.NeuerPrueferActivity has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@42961c68 that was originally added here
2603-28 11:31:57.066: E/WindowManager(9863): android.view.WindowLeaked: Activity de.sturmfrai.gefahrenbeurteilung.NeuerPrueferActivity has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@42961c68 that was originally added here
2703-28 11:31:57.066: E/WindowManager(9863): at android.view.ViewRootImpl.<init>(ViewRootImpl.java:441)
2803-28 11:31:57.066: E/WindowManager(9863): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:279)
2903-28 11:31:57.066: E/WindowManager(9863): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:215)
3003-28 11:31:57.066: E/WindowManager(9863): at android.view.WindowManagerImpl$CompatModeWrapper.addView(WindowManagerImpl.java:140)
3103-28 11:31:57.066: E/WindowManager(9863): at android.view.Window$LocalWindowManager.addView(Window.java:539)
3203-28 11:31:57.066: E/WindowManager(9863): at android.app.Dialog.show(Dialog.java:278)