Benötige Hilfe bei der Fehlsersuche um ProgressBar erscheinen und verschwinden zu lassen

1package com.yorrickr.dashboard;
2
3import android.app.Activity;
4import android.content.Context;
5import android.content.Intent;
6import android.os.Bundle;
7import android.util.Log;
8import android.view.View;
9import android.view.ViewGroup.LayoutParams;
10import android.widget.Button;
11import android.widget.FrameLayout;
12
13
14public class StundenplanAuswahl extends Activity {
15
16 /*private boolean klick = false;
17
18 final LayoutParams params = new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT);
19
20 private static final String TAG = StundenplanAuswahl.class.getSimpleName();
21 String name = "android.widget.ProgressBar";
22 final FrameLayout f = (FrameLayout) findViewById(R.id.frame1);
23 final Button b = (Button) findViewById(R.id.button1); */
24
25 @Override
26 public void onCreate(Bundle savedInstanceState) {
27 super.onCreate(savedInstanceState);
28 setContentView(R.layout.stundenplan_auswahl);
29 //Log.e(TAG, "onCreate gestartet.");
30 }
31
32 public void wechsle11(final View view) {
33 startActivity(new Intent(this, plan11.class));
34 }
35
36 /*public void aktual(View view) {
37 Log.e(TAG, "aktual gestartet");
38 if (klick == false) {
39 b.setText(getString(R.string.ds_ButtonAktualisieren2));
40 try {
41 Class c = Class.forName(name);
42 Object o = c.getDeclaredConstructor(Context.class).newInstance(this);
43 if (o instanceof View) {
44 f.removeAllViews();
45 f.addView((View) o, params);
46 f.forceLayout();
47 klick = true;
48 }
49 } catch (Throwable tr) {
50 Log.e(TAG, "Fehler bei Instanziieren von "+ name, tr);}
51 }
52
53 else {
54 klick = false;
55 b.setText(getString(R.string.ds_ButtonAktualisieren1));
56 }
57 }/*/
58
59}

1<?xml version="1.0" encoding="utf-8"?>
2<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
3 android:layout_width="match_parent"
4 android:layout_height="match_parent"
5 android:orientation="vertical" >
6
7
8 <TextView
9 android:layout_width="wrap_content"
10 android:layout_height="wrap_content"
11 android:layout_gravity="center_horizontal"
12 android:text="@string/ds_TextView1" />
13
14
15 <TextView
16 android:layout_width="wrap_content"
17 android:layout_height="wrap_content"
18 android:layout_gravity="center_horizontal"
19 android:text="@string/ds_TextView2"
20 android:textAppearance="?android:attr/textAppearanceLarge" />
21
22 <Button
23 android:layout_width="match_parent"
24 android:layout_height="wrap_content"
25 android:text="@string/ds_Button11"
26 android:onClick="wechsle11"/>
27
28 <Button
29 android:layout_width="match_parent"
30 android:layout_height="wrap_content"
31 android:text="@string/ds_Button12" />
32
33 <Button
34 android:layout_width="match_parent"
35 android:layout_height="wrap_content"
36 android:text="@string/ds_Button13"/>
37
38 <Button
39 android:id="@+id/button1"
40 android:layout_width="match_parent"
41 android:layout_height="wrap_content"
42 android:text="@string/ds_ButtonAktualisieren1"
43 android:onClick="aktual"
44 />
45
46
47 <FrameLayout
48 android:id="@+id/frame1"
49 android:layout_width="wrap_content"
50 android:layout_height="wrap_content"
51 />
52
53</LinearLayout>

111-04 10:08:39.295: D/AndroidRuntime(352): Shutting down VM
211-04 10:08:39.306: W/dalvikvm(352): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
311-04 10:08:39.325: E/AndroidRuntime(352): FATAL EXCEPTION: main
411-04 10:08:39.325: E/AndroidRuntime(352): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.yorrickreinhart.dashboard/com.yorrickreinhart.dashboard.StundenplanAuswahl}: java.lang.NullPointerException
511-04 10:08:39.325: E/AndroidRuntime(352): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2585)
611-04 10:08:39.325: E/AndroidRuntime(352): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
711-04 10:08:39.325: E/AndroidRuntime(352): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
811-04 10:08:39.325: E/AndroidRuntime(352): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
911-04 10:08:39.325: E/AndroidRuntime(352): at android.os.Handler.dispatchMessage(Handler.java:99)
1011-04 10:08:39.325: E/AndroidRuntime(352): at android.os.Looper.loop(Looper.java:123)
1111-04 10:08:39.325: E/AndroidRuntime(352): at android.app.ActivityThread.main(ActivityThread.java:4627)
1211-04 10:08:39.325: E/AndroidRuntime(352): at java.lang.reflect.Method.invokeNative(Native Method)
1311-04 10:08:39.325: E/AndroidRuntime(352): at java.lang.reflect.Method.invoke(Method.java:521)
1411-04 10:08:39.325: E/AndroidRuntime(352): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
1511-04 10:08:39.325: E/AndroidRuntime(352): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
1611-04 10:08:39.325: E/AndroidRuntime(352): at dalvik.system.NativeStart.main(Native Method)
1711-04 10:08:39.325: E/AndroidRuntime(352): Caused by: java.lang.NullPointerException
1811-04 10:08:39.325: E/AndroidRuntime(352): at android.app.Activity.findViewById(Activity.java:1637)
1911-04 10:08:39.325: E/AndroidRuntime(352): at com.yorrickreinhart.dashboard.StundenplanAuswahl.<init>(StundenplanAuswahl.java:22)
2011-04 10:08:39.325: E/AndroidRuntime(352): at java.lang.Class.newInstanceImpl(Native Method)
2111-04 10:08:39.325: E/AndroidRuntime(352): at java.lang.Class.newInstance(Class.java:1429)
2211-04 10:08:39.325: E/AndroidRuntime(352): at android.app.Instrumentation.newActivity(Instrumentation.java:1021)
2311-04 10:08:39.325: E/AndroidRuntime(352): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2577)
2411-04 10:08:39.325: E/AndroidRuntime(352): ... 11 more

1@Override
2 public void onCreate(Bundle savedInstanceState) {
3 super.onCreate(savedInstanceState);
4 setContentView(R.layout.stundenplan_auswahl);
5 Log.e(TAG, "onCreate gestartet.");
6 final FrameLayout f = (FrameLayout) findViewById(R.id.frame1);
7 final Button b = (Button) findViewById(R.id.button1);
8 }