Ergebnis einer Rechenoperation auf zweiter Seite anzeigen lassen

H

heinmueck70

Neues Mitglied
1
Hallo!
Ich habe mit Eclipse eine App erstellt, die verschiedene Rechenoperationen ausführt. Das funktioniert auch. Der Übersichtlichkeit aber möchte ich das Ergebnis, wenn ich auf den Button drücke, nicht auf der gleichen Seite, sondern auf einer neuen/zweiten Seite anzeigen lassen.
Dafür habe ich eine zweite Layout xml Datei erstellt. Als Test habe ich einen Text dort darstellen lassen. Das funktioniert auch. Wenn ich aber die Ergebnis Text Views dort einfüge funktioniert das Ganze nicht mehr. (Im Emulator bricht er ab.) Weder in der Main.activity.java Datei noch in den beiden xml Dateien kann ich Fehler finden. Wer kann mir helfen oder einen Link für so ein Apperstellung schicken?
Besten Dank im voraus

Michael
 
Bei solchen Problemen kann man dir so nicht weiter helfen. Damit dir wer helfen kann bräuchten wir Code oder Logcat (im Idealfall beides ;) )
Dann kann man auch sagen was du falsch gemacht hast ;)
 
Hallo!
Ich habe es mir schon fast gedacht, daß eine, mehr oder weniger allgemein gestellte Frage, ohne Details nicht ausreicht. Entschuldigung dafür!
Ich habe mal versucht die Java Datei als screenshot beizulegen und auch wie die erste und zweite Seite aussehen soll bzw. aussieht (Zweite Seite funktioniert ja leider so nicht.)
Dann habe ich den Code der zweiten Seite hier eingefügt.
Ich hoffe das langt. Ich bin leider noch ein Anfänger in solchen Sachen. :unsure:
Auch weiß ich nicht wie ich den Logcat für euch kopiere.
Trotzdem schon mal vielen Dank für eure Mühen!

Michael
Code: 
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 [LEFT][SIZE=2][COLOR=#7f007f][SIZE=2][COLOR=#7f007f]android:textStyle[/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2]=[/SIZE][I][SIZE=2][COLOR=#2a00ff][SIZE=2][COLOR=#2a00ff]"bold"[/COLOR][/SIZE][/COLOR][/SIZE][/I][SIZE=2][COLOR=#008080][SIZE=2][COLOR=#008080]/>[/COLOR][/SIZE][/COLOR][/SIZE][/LEFT]
[SIZE=2][COLOR=#008080][SIZE=2][COLOR=#008080]
[/COLOR][/SIZE][/COLOR][/SIZE] [LEFT][SIZE=2][COLOR=#008080][SIZE=2][COLOR=#008080]<[/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2][COLOR=#3f7f7f][SIZE=2][COLOR=#3f7f7f]TextView[/COLOR][/SIZE][/COLOR][/SIZE][/LEFT]
[SIZE=2][COLOR=#3f7f7f][SIZE=2][COLOR=#3f7f7f]
[/COLOR][/SIZE][/COLOR][/SIZE] [LEFT][SIZE=2][COLOR=#7f007f][SIZE=2][COLOR=#7f007f]android:id[/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2]=[/SIZE][I][SIZE=2][COLOR=#2a00ff][SIZE=2][COLOR=#2a00ff]"@+id/lampe_lampe"[/COLOR][/SIZE][/COLOR][/SIZE][/I][/LEFT]
 [LEFT][SIZE=2][COLOR=#7f007f][SIZE=2][COLOR=#7f007f]android:layout_width[/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2]=[/SIZE][I][SIZE=2][COLOR=#2a00ff][SIZE=2][COLOR=#2a00ff]"wrap_content"[/COLOR][/SIZE][/COLOR][/SIZE][/I][/LEFT]
 [LEFT][SIZE=2][COLOR=#7f007f][SIZE=2][COLOR=#7f007f]android:layout_height[/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2]=[/SIZE][I][SIZE=2][COLOR=#2a00ff][SIZE=2][COLOR=#2a00ff]"wrap_content"[/COLOR][/SIZE][/COLOR][/SIZE][/I][/LEFT]
 [LEFT][SIZE=2][COLOR=#7f007f][SIZE=2][COLOR=#7f007f]android:layout_marginLeft[/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2]=[/SIZE][I][SIZE=2][COLOR=#2a00ff][SIZE=2][COLOR=#2a00ff]"10dp"[/COLOR][/SIZE][/COLOR][/SIZE][/I][/LEFT]
 [LEFT][SIZE=2][COLOR=#7f007f][SIZE=2][COLOR=#7f007f]android:layout_marginTop[/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2]=[/SIZE][I][SIZE=2][COLOR=#2a00ff][SIZE=2][COLOR=#2a00ff]"280dp"[/COLOR][/SIZE][/COLOR][/SIZE][/I][/LEFT]
 [LEFT][SIZE=2][COLOR=#7f007f][SIZE=2][COLOR=#7f007f]android:textColor[/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2]=[/SIZE][I][SIZE=2][COLOR=#2a00ff][SIZE=2][COLOR=#2a00ff]"#ffffff"[/COLOR][/SIZE][/COLOR][/SIZE][/I][/LEFT]
 [LEFT][SIZE=2][COLOR=#7f007f][SIZE=2][COLOR=#7f007f]android:textSize[/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2]=[/SIZE][I][SIZE=2][COLOR=#2a00ff][SIZE=2][COLOR=#2a00ff]"12sp"[/COLOR][/SIZE][/COLOR][/SIZE][/I][/LEFT]
 [LEFT][SIZE=2][COLOR=#7f007f][SIZE=2][COLOR=#7f007f]android:textStyle[/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2]=[/SIZE][I][SIZE=2][COLOR=#2a00ff][SIZE=2][COLOR=#2a00ff]"bold"[/COLOR][/SIZE][/COLOR][/SIZE][/I][SIZE=2][COLOR=#008080][SIZE=2][COLOR=#008080]/>[/COLOR][/SIZE][/COLOR][/SIZE][/LEFT]
[SIZE=2][COLOR=#008080][SIZE=2][COLOR=#008080]
[/COLOR][/SIZE][/COLOR][/SIZE] [LEFT][SIZE=2][COLOR=#008080][SIZE=2][COLOR=#008080]</[/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2][COLOR=#3f7f7f][SIZE=2][COLOR=#3f7f7f]FrameLayout[/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2][COLOR=#008080][SIZE=2][COLOR=#008080]>[/COLOR][/SIZE][/COLOR][/SIZE][/LEFT]
[SIZE=2][COLOR=#008080][SIZE=2][COLOR=#008080]
[/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2][COLOR=#008080][SIZE=2][COLOR=#008080]</[/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2][COLOR=#3f7f7f][SIZE=2][COLOR=#3f7f7f]FrameLayout[/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2][COLOR=#008080][SIZE=2][COLOR=#008080]>
[/COLOR][/SIZE][/COLOR][/SIZE]

[SIZE=2][COLOR=#008080][SIZE=2][COLOR=#008080]
[/COLOR][/SIZE][/COLOR][/SIZE]
 

Anhänge

  • java.jpg
    java.jpg
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Und hier ist mein Java Code
Code: 
[B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055] [LEFT]package[/LEFT]
[/COLOR][/SIZE][/COLOR][/SIZE][/B] [LEFT][SIZE=2]de.example.abstandsapp;[/SIZE][/LEFT]
[SIZE=2]
[/SIZE][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055] [LEFT]Import [/LEFT]
[/COLOR][/SIZE][/COLOR][/SIZE][/B] [LEFT][SIZE=2]android.app.Activity;[/SIZE][/LEFT]
[B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055] [LEFT]Import [/LEFT]
[/COLOR][/SIZE][/COLOR][/SIZE][/B] [LEFT][SIZE=2]android.os.Bundle;[/SIZE][/LEFT]
[B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055] [LEFT]Import [/LEFT]
[/COLOR][/SIZE][/COLOR][/SIZE][/B] [LEFT][SIZE=2]android.view.View;[/SIZE][/LEFT]
[B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055] [LEFT]Import [/LEFT]
[/COLOR][/SIZE][/COLOR][/SIZE][/B] [LEFT][SIZE=2]android.widget.EditText;[/SIZE][/LEFT]
[B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055] [LEFT]Import [/LEFT]
[/COLOR][/SIZE][/COLOR][/SIZE][/B] [LEFT][SIZE=2]android.widget.ImageView;[/SIZE][/LEFT]
[B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055] [LEFT]Import [/LEFT]
[/COLOR][/SIZE][/COLOR][/SIZE][/B] [LEFT][SIZE=2]android.widget.TextView;[/SIZE][/LEFT]
[SIZE=2]
[/SIZE][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055] [LEFT]public [/LEFT]
[/COLOR][/SIZE][/COLOR][/SIZE][/B] [LEFT][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]class[/COLOR][/SIZE][/COLOR][/SIZE][/B][SIZE=2] FullscreenActivity [/SIZE][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]extends[/COLOR][/SIZE][/COLOR][/SIZE][/B][SIZE=2] Activity {[/SIZE][/LEFT]
[SIZE=2]
 [LEFT]ImageView [/LEFT]
[/SIZE] [LEFT][SIZE=2][COLOR=#0000c0][SIZE=2][COLOR=#0000c0]myImageView[/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2];[/SIZE][/LEFT]
[SIZE=2]
 [LEFT]EditText [/LEFT]
[/SIZE] [LEFT][SIZE=2][COLOR=#0000c0][SIZE=2][COLOR=#0000c0]gesamtlaenge[/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2];[/SIZE][/LEFT]
[SIZE=2] [LEFT]EditText [/LEFT]
[/SIZE] [LEFT][SIZE=2][COLOR=#0000c0][SIZE=2][COLOR=#0000c0]lampenanzahl[/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2];[/SIZE][/LEFT]
[SIZE=2] [LEFT]EditText [/LEFT]
[/SIZE] [LEFT][SIZE=2][COLOR=#0000c0][SIZE=2][COLOR=#0000c0]lampenlaenge[/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2];[/SIZE][/LEFT]
[SIZE=2] [LEFT]TextView [/LEFT]
[/SIZE] [LEFT][SIZE=2][COLOR=#0000c0][SIZE=2][COLOR=#0000c0]ergebniszwischen[/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2];[/SIZE][/LEFT]
[SIZE=2] [LEFT]TextView [/LEFT]
[/SIZE] [LEFT][SIZE=2][COLOR=#0000c0][SIZE=2][COLOR=#0000c0]ergebnis_anfang_ende[/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2];[/SIZE][/LEFT]
[SIZE=2] [LEFT]TextView [/LEFT]
[/SIZE] [LEFT][SIZE=2][COLOR=#0000c0][SIZE=2][COLOR=#0000c0]lampe_lampe[/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2];[/SIZE][/LEFT]
[SIZE=2]
[/SIZE] [LEFT][SIZE=2][COLOR=#646464][SIZE=2][COLOR=#646464]@Override[/COLOR][/SIZE][/COLOR][/SIZE][/LEFT]
[SIZE=2][COLOR=#646464][SIZE=2][COLOR=#646464]
[/COLOR][/SIZE][/COLOR][/SIZE] [LEFT][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]protected[/COLOR][/SIZE][/COLOR][/SIZE][/B][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]void[/COLOR][/SIZE][/COLOR][/SIZE][/B][SIZE=2] onCreate(Bundle savedInstanceState) {[/SIZE][/LEFT]
[SIZE=2]
[/SIZE] [LEFT][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]super[/COLOR][/SIZE][/COLOR][/SIZE][/B][SIZE=2].onCreate(savedInstanceState);[/SIZE][/LEFT]
[SIZE=2]
 [LEFT]setContentView(R.layout.[/LEFT]
[/SIZE] [LEFT][I][SIZE=2][COLOR=#0000c0][SIZE=2][COLOR=#0000c0]activity_fullscreen[/COLOR][/SIZE][/COLOR][/SIZE][/I][SIZE=2]);}[/SIZE][/LEFT]
[SIZE=2]
[/SIZE] [LEFT][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]public[/COLOR][/SIZE][/COLOR][/SIZE][/B][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]void[/COLOR][/SIZE][/COLOR][/SIZE][/B][SIZE=2] ButtonKlick (View view) {[/SIZE][/LEFT]
[SIZE=2]
 [LEFT]setContentView(R.layout.[/LEFT]
[/SIZE] [LEFT][I][SIZE=2][COLOR=#0000c0][SIZE=2][COLOR=#0000c0]zweiteseite[/COLOR][/SIZE][/COLOR][/SIZE][/I][SIZE=2]);[/SIZE][/LEFT]
[SIZE=2]
[/SIZE] [LEFT][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]int[/COLOR][/SIZE][/COLOR][/SIZE][/B][SIZE=2] gesamtlaenge;[/SIZE][/LEFT]
 [LEFT][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]int[/COLOR][/SIZE][/COLOR][/SIZE][/B][SIZE=2] lampenanzahl;[/SIZE][/LEFT]
 [LEFT][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]int[/COLOR][/SIZE][/COLOR][/SIZE][/B][SIZE=2] lampenlaenge;[/SIZE][/LEFT]
 [LEFT][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]int[/COLOR][/SIZE][/COLOR][/SIZE][/B][SIZE=2] ergebniszwischen;[/SIZE][/LEFT]
 [LEFT][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]int[/COLOR][/SIZE][/COLOR][/SIZE][/B][SIZE=2] ergebnis_anfang_ende;[/SIZE][/LEFT]
 [LEFT][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]int[/COLOR][/SIZE][/COLOR][/SIZE][/B][SIZE=2] lampe_lampe;[/SIZE][/LEFT]
[SIZE=2]
 [LEFT]EditText Feld1 =(EditText)findViewById(R.id.[/LEFT]
[/SIZE] [LEFT][I][SIZE=2][COLOR=#0000c0][SIZE=2][COLOR=#0000c0]gesamtlaenge[/COLOR][/SIZE][/COLOR][/SIZE][/I][SIZE=2]); [/SIZE][/LEFT]
[SIZE=2] [LEFT]EditText Feld2 =(EditText)findViewById(R.id.[/LEFT]
[/SIZE] [LEFT][I][SIZE=2][COLOR=#0000c0][SIZE=2][COLOR=#0000c0]lampenanzahl[/COLOR][/SIZE][/COLOR][/SIZE][/I][SIZE=2]); [/SIZE][/LEFT]
[SIZE=2] [LEFT]EditText Feld3 =(EditText)findViewById(R.id.[/LEFT]
[/SIZE] [LEFT][I][SIZE=2][COLOR=#0000c0][SIZE=2][COLOR=#0000c0]lampenlaenge[/COLOR][/SIZE][/COLOR][/SIZE][/I][SIZE=2]); [/SIZE][/LEFT]
[SIZE=2] [LEFT]TextView Feld4 =(TextView)findViewById(R.id.[/LEFT]
[/SIZE] [LEFT][I][SIZE=2][COLOR=#0000c0][SIZE=2][COLOR=#0000c0]ergebniszwischen[/COLOR][/SIZE][/COLOR][/SIZE][/I][SIZE=2]);[/SIZE][/LEFT]
[SIZE=2] [LEFT]TextView Feld5 =(TextView)findViewById(R.id.[/LEFT]
[/SIZE] [LEFT][I][SIZE=2][COLOR=#0000c0][SIZE=2][COLOR=#0000c0]ergebnis_anfang_ende[/COLOR][/SIZE][/COLOR][/SIZE][/I][SIZE=2]);[/SIZE][/LEFT]
[SIZE=2] [LEFT]TextView Feld6 =(TextView)findViewById(R.id.[/LEFT]
[/SIZE] [LEFT][I][SIZE=2][COLOR=#0000c0][SIZE=2][COLOR=#0000c0]lampe_lampe[/COLOR][/SIZE][/COLOR][/SIZE][/I][SIZE=2]);[/SIZE][/LEFT]
[SIZE=2]
[/SIZE] [LEFT][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]if[/COLOR][/SIZE][/COLOR][/SIZE][/B][SIZE=2] (Feld1.getText().toString().length() == 0) {[/SIZE][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]return[/COLOR][/SIZE][/COLOR][/SIZE][/B][SIZE=2]; }[/SIZE][/LEFT]
[SIZE=2]
[/SIZE] [LEFT][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]if[/COLOR][/SIZE][/COLOR][/SIZE][/B][SIZE=2] (Feld2.getText().toString().length() == 0) {[/SIZE][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]return[/COLOR][/SIZE][/COLOR][/SIZE][/B][SIZE=2]; }[/SIZE][/LEFT]
[SIZE=2]
[/SIZE] [LEFT][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]if[/COLOR][/SIZE][/COLOR][/SIZE][/B][SIZE=2] (Feld3.getText().toString().length() == 0) {[/SIZE][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]return[/COLOR][/SIZE][/COLOR][/SIZE][/B][SIZE=2]; }[/SIZE][/LEFT]
[SIZE=2]
 [LEFT]gesamtlaenge = Integer.[I]parseInt[/I](Feld1.getText().toString());[/LEFT]
 [LEFT]lampenanzahl = Integer.[I]parseInt[/I](Feld2.getText().toString());[/LEFT]
 [LEFT]lampenlaenge = Integer.[I]parseInt[/I](Feld3.getText().toString());[/LEFT]
 [LEFT]ergebniszwischen = (gesamtlaenge - (lampenanzahl * lampenlaenge)) / (lampenanzahl + 1);[/LEFT]
 [LEFT]ergebnis_anfang_ende = ergebniszwischen + (lampenlaenge/2);[/LEFT]
 [LEFT]lampe_lampe = ergebnis_anfang_ende + (lampenlaenge/2);[/LEFT]
 [LEFT]Feld4.setText(String.[I]valueOf[/I](ergebniszwischen)); [/LEFT]
 [LEFT]Feld5.setText(String.[I]valueOf[/I](ergebnis_anfang_ende));[/LEFT]
 [LEFT]Feld6.setText(String.[I]valueOf[/I](lampe_lampe));[/LEFT]
 [LEFT]}[/LEFT]
}
[/SIZE]
 
Zuletzt bearbeitet von einem Moderator:
Hey,
dir wird deswegen keiner böse sein, aber es wird keiner helfen (können) :biggrin:

Wenn du Code hier rein postest, kannst du den Code in ["CODE"] ["/CODE"] einfügen (ohne Anführungszeichen). So kann man die Formatierung beibehalten und ist besser strukturiert :thumbup:

Im Logcat kannst du normalerweise deine roten Error-Meldungen markieren und mit STRG+C in die Zwischenablage kopieren. Ob es beim Eclipse-Monitor so geht weiß ich nicht genau, nutze für den Logcat DDMS aus dem tools-Ordner
 
Das sind die Fehlermeldungen, wenn ich auf den Button klicke:



Code: 
11-03 11:51:27.128: E/AndroidRuntime(1803): FATAL EXCEPTION: main
11-03 11:51:27.128: E/AndroidRuntime(1803): Process: de.example.abstandsapp, PID: 1803
11-03 11:51:27.128: E/AndroidRuntime(1803): java.lang.IllegalStateException: Could not execute method of the activity
11-03 11:51:27.128: E/AndroidRuntime(1803): at android.view.View$1.onClick(View.java:3823)
11-03 11:51:27.128: E/AndroidRuntime(1803): at android.view.View.performClick(View.java:4438)
11-03 11:51:27.128: E/AndroidRuntime(1803): at android.view.View$PerformClick.run(View.java:18422)
11-03 11:51:27.128: E/AndroidRuntime(1803): at android.os.Handler.handleCallback(Handler.java:733)
11-03 11:51:27.128: E/AndroidRuntime(1803): at android.os.Handler.dispatchMessage(Handler.java:95)
11-03 11:51:27.128: E/AndroidRuntime(1803): at android.os.Looper.loop(Looper.java:136)
11-03 11:51:27.128: E/AndroidRuntime(1803): at android.app.ActivityThread.main(ActivityThread.java:5017)
11-03 11:51:27.128: E/AndroidRuntime(1803): at java.lang.reflect.Method.invokeNative(Native Method)
11-03 11:51:27.128: E/AndroidRuntime(1803): at java.lang.reflect.Method.invoke(Method.java:515)
11-03 11:51:27.128: E/AndroidRuntime(1803): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
11-03 11:51:27.128: E/AndroidRuntime(1803): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
11-03 11:51:27.128: E/AndroidRuntime(1803): at dalvik.system.NativeStart.main(Native Method)
11-03 11:51:27.128: E/AndroidRuntime(1803): Caused by: java.lang.reflect.InvocationTargetException
11-03 11:51:27.128: E/AndroidRuntime(1803): at java.lang.reflect.Method.invokeNative(Native Method)
11-03 11:51:27.128: E/AndroidRuntime(1803): at java.lang.reflect.Method.invoke(Method.java:515)
11-03 11:51:27.128: E/AndroidRuntime(1803): at android.view.View$1.onClick(View.java:3818)
11-03 11:51:27.128: E/AndroidRuntime(1803): ... 11 more
11-03 11:51:27.128: E/AndroidRuntime(1803): Caused by: java.lang.NullPointerException
11-03 11:51:27.128: E/AndroidRuntime(1803): at de.example.abstandsapp.FullscreenActivity.ButtonKlick(FullscreenActivity.java:41)
11-03 11:51:27.128: E/AndroidRuntime(1803): ... 14 more
 
Zuletzt bearbeitet von einem Moderator:
Da haben wir es doch, du hast deinem Button die onClick-Methode mit dem Namen "ButtonKlick" zugewiesen. Sobald der Button gedrückt wird sucht er die Methode "ButtonKlick in der Activity, und findet sie nicht weil du sie in der onCreate-Methode hast (deshalb die NullPointerExcption).
Mach am besten erst onCreate mit der Klammer zu und dann ButtonKlick auf. Dann sollte es theoretisch laufen ;)
 
Zuletzt bearbeitet:
Hier nochmal der Java als Code eingefügt. Danke für den Hinweis/Tipp:thumbup:!

Code: 
  [B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]  
 [LEFT]package[/LEFT]
[/COLOR][/SIZE][/COLOR][/SIZE][/B] [LEFT][SIZE=2]de.example.abstandsapp;[/SIZE][/LEFT]
[SIZE=2]
 [/SIZE][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]   [LEFT]import[/LEFT]
[/COLOR][/SIZE][/COLOR][/SIZE][/B] [LEFT][SIZE=2]android.app.Activity;[/SIZE][/LEFT]
[SIZE=2]
[/SIZE][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055] [LEFT]import[/LEFT]
[/COLOR][/SIZE][/COLOR][/SIZE][/B] [LEFT][SIZE=2]android.os.Bundle;[/SIZE][/LEFT]
[SIZE=2]
[/SIZE][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055] [LEFT]import[/LEFT]
[/COLOR][/SIZE][/COLOR][/SIZE][/B] [LEFT][SIZE=2]android.view.View;[/SIZE][/LEFT]
[SIZE=2]
[/SIZE][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055] [LEFT]import[/LEFT]
[/COLOR][/SIZE][/COLOR][/SIZE][/B] [LEFT][SIZE=2]android.widget.EditText;[/SIZE][/LEFT]
[SIZE=2]
[/SIZE][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055] [LEFT]import[/LEFT]
[/COLOR][/SIZE][/COLOR][/SIZE][/B] [LEFT][SIZE=2]android.widget.ImageView;[/SIZE][/LEFT]
[SIZE=2]
[/SIZE][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055] [LEFT]import[/LEFT]
[/COLOR][/SIZE][/COLOR][/SIZE][/B] [LEFT][SIZE=2]android.widget.TextView;[/SIZE][/LEFT]
[SIZE=2]
 [/SIZE][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]   [LEFT]public[/LEFT]
[/COLOR][/SIZE][/COLOR][/SIZE][/B] [LEFT][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]class[/COLOR][/SIZE][/COLOR][/SIZE][/B][SIZE=2] FullscreenActivity [/SIZE][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]extends[/COLOR][/SIZE][/COLOR][/SIZE][/B][SIZE=2] Activity {[/SIZE][/LEFT]
[SIZE=2]
   [LEFT]ImageView [/LEFT]
[/SIZE] [LEFT][SIZE=2][COLOR=#0000c0][SIZE=2][COLOR=#0000c0]myImageView[/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2];[/SIZE][/LEFT]
[SIZE=2]
    [LEFT]EditText [/LEFT]
[/SIZE] [LEFT][SIZE=2][COLOR=#0000c0][SIZE=2][COLOR=#0000c0]gesamtlaenge[/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2];[/SIZE][/LEFT]
[SIZE=2]
   [LEFT]EditText [/LEFT]
[/SIZE] [LEFT][SIZE=2][COLOR=#0000c0][SIZE=2][COLOR=#0000c0]lampenanzahl[/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2];[/SIZE][/LEFT]
[SIZE=2]
   [LEFT]EditText [/LEFT]
[/SIZE] [LEFT][SIZE=2][COLOR=#0000c0][SIZE=2][COLOR=#0000c0]lampenlaenge[/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2];[/SIZE][/LEFT]
[SIZE=2]
   [LEFT]TextView [/LEFT]
[/SIZE] [LEFT][SIZE=2][COLOR=#0000c0][SIZE=2][COLOR=#0000c0]ergebniszwischen[/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2];[/SIZE][/LEFT]
[SIZE=2]
   [LEFT]TextView [/LEFT]
[/SIZE] [LEFT][SIZE=2][COLOR=#0000c0][SIZE=2][COLOR=#0000c0]ergebnis_anfang_ende[/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2];[/SIZE][/LEFT]
[SIZE=2]
   [LEFT]TextView [/LEFT]
[/SIZE] [LEFT][SIZE=2][COLOR=#0000c0][SIZE=2][COLOR=#0000c0]lampe_lampe[/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2];[/SIZE][/LEFT]
[SIZE=2]
  [/SIZE]  [LEFT][SIZE=2][COLOR=#646464][SIZE=2][COLOR=#646464]@Override[/COLOR][/SIZE][/COLOR][/SIZE][/LEFT]
[SIZE=2][COLOR=#646464][SIZE=2][COLOR=#646464]
[/COLOR][/SIZE][/COLOR][/SIZE] [LEFT][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]protected[/COLOR][/SIZE][/COLOR][/SIZE][/B][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]void[/COLOR][/SIZE][/COLOR][/SIZE][/B][SIZE=2] onCreate(Bundle savedInstanceState) {[/SIZE][/LEFT]
[SIZE=2]
 [/SIZE]  [LEFT][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]super[/COLOR][/SIZE][/COLOR][/SIZE][/B][SIZE=2].onCreate(savedInstanceState);[/SIZE][/LEFT]
[SIZE=2]
   [LEFT]setContentView(R.layout.[/LEFT]
[/SIZE] [LEFT][I][SIZE=2][COLOR=#0000c0][SIZE=2][COLOR=#0000c0]activity_fullscreen[/COLOR][/SIZE][/COLOR][/SIZE][/I][SIZE=2]);}[/SIZE][/LEFT]
[SIZE=2]
  [/SIZE]  [LEFT][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]public[/COLOR][/SIZE][/COLOR][/SIZE][/B][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]void[/COLOR][/SIZE][/COLOR][/SIZE][/B][SIZE=2] ButtonKlick (View view) {[/SIZE][/LEFT]
[SIZE=2]
   [LEFT]setContentView(R.layout.[/LEFT]
[/SIZE] [LEFT][I][SIZE=2][COLOR=#0000c0][SIZE=2][COLOR=#0000c0]zweiteseite[/COLOR][/SIZE][/COLOR][/SIZE][/I][SIZE=2]);[/SIZE][/LEFT]
[SIZE=2]
  [/SIZE]  [LEFT][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]int[/COLOR][/SIZE][/COLOR][/SIZE][/B][SIZE=2] gesamtlaenge;[/SIZE][/LEFT]
[SIZE=2]
 [/SIZE]  [LEFT][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]int[/COLOR][/SIZE][/COLOR][/SIZE][/B][SIZE=2] lampenanzahl;[/SIZE][/LEFT]
[SIZE=2]
 [/SIZE]  [LEFT][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]int[/COLOR][/SIZE][/COLOR][/SIZE][/B][SIZE=2] lampenlaenge;[/SIZE][/LEFT]
[SIZE=2]
 [/SIZE]  [LEFT][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]int[/COLOR][/SIZE][/COLOR][/SIZE][/B][SIZE=2] ergebniszwischen;[/SIZE][/LEFT]
[SIZE=2]
 [/SIZE]  [LEFT][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]int[/COLOR][/SIZE][/COLOR][/SIZE][/B][SIZE=2] ergebnis_anfang_ende;[/SIZE][/LEFT]
[SIZE=2]
 [/SIZE]  [LEFT][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]int[/COLOR][/SIZE][/COLOR][/SIZE][/B][SIZE=2] lampe_lampe;[/SIZE][/LEFT]
[SIZE=2]
    [LEFT]EditText Feld1 =(EditText)findViewById(R.id.[/LEFT]
[/SIZE] [LEFT][I][SIZE=2][COLOR=#0000c0][SIZE=2][COLOR=#0000c0]gesamtlaenge[/COLOR][/SIZE][/COLOR][/SIZE][/I][SIZE=2]); [/SIZE][/LEFT]
[SIZE=2]
   [LEFT]EditText Feld2 =(EditText)findViewById(R.id.[/LEFT]
[/SIZE] [LEFT][I][SIZE=2][COLOR=#0000c0][SIZE=2][COLOR=#0000c0]lampenanzahl[/COLOR][/SIZE][/COLOR][/SIZE][/I][SIZE=2]); [/SIZE][/LEFT]
[SIZE=2]
   [LEFT]EditText Feld3 =(EditText)findViewById(R.id.[/LEFT]
[/SIZE] [LEFT][I][SIZE=2][COLOR=#0000c0][SIZE=2][COLOR=#0000c0]lampenlaenge[/COLOR][/SIZE][/COLOR][/SIZE][/I][SIZE=2]); [/SIZE][/LEFT]
[SIZE=2]
   [LEFT]TextView Feld4 =(TextView)findViewById(R.id.[/LEFT]
[/SIZE] [LEFT][I][SIZE=2][COLOR=#0000c0][SIZE=2][COLOR=#0000c0]ergebniszwischen[/COLOR][/SIZE][/COLOR][/SIZE][/I][SIZE=2]);[/SIZE][/LEFT]
[SIZE=2]
   [LEFT]TextView Feld5 =(TextView)findViewById(R.id.[/LEFT]
[/SIZE] [LEFT][I][SIZE=2][COLOR=#0000c0][SIZE=2][COLOR=#0000c0]ergebnis_anfang_ende[/COLOR][/SIZE][/COLOR][/SIZE][/I][SIZE=2]);[/SIZE][/LEFT]
[SIZE=2]
   [LEFT]TextView Feld6 =(TextView)findViewById(R.id.[/LEFT]
[/SIZE] [LEFT][I][SIZE=2][COLOR=#0000c0][SIZE=2][COLOR=#0000c0]lampe_lampe[/COLOR][/SIZE][/COLOR][/SIZE][/I][SIZE=2]);[/SIZE][/LEFT]
[SIZE=2]
 [/SIZE]  [LEFT][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]if[/COLOR][/SIZE][/COLOR][/SIZE][/B][SIZE=2] (Feld1.getText().toString().length() == 0) {[/SIZE][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]return[/COLOR][/SIZE][/COLOR][/SIZE][/B][SIZE=2]; }[/SIZE][/LEFT]
[SIZE=2]
 [/SIZE]  [LEFT][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]if[/COLOR][/SIZE][/COLOR][/SIZE][/B][SIZE=2] (Feld2.getText().toString().length() == 0) {[/SIZE][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]return[/COLOR][/SIZE][/COLOR][/SIZE][/B][SIZE=2]; }[/SIZE][/LEFT]
[SIZE=2]
 [/SIZE]  [LEFT][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]if[/COLOR][/SIZE][/COLOR][/SIZE][/B][SIZE=2] (Feld3.getText().toString().length() == 0) {[/SIZE][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]return[/COLOR][/SIZE][/COLOR][/SIZE][/B][SIZE=2]; }[/SIZE][/LEFT]
[SIZE=2]
    [LEFT]gesamtlaenge = Integer.[I]parseInt[/I](Feld1.getText().toString());[/LEFT]
 [LEFT]lampenanzahl = Integer.[I]parseInt[/I](Feld2.getText().toString());[/LEFT]
 [LEFT]lampenlaenge = Integer.[I]parseInt[/I](Feld3.getText().toString());[/LEFT]
  [LEFT]ergebniszwischen = (gesamtlaenge - (lampenanzahl * lampenlaenge)) / (lampenanzahl + 1);[/LEFT]
 [LEFT]ergebnis_anfang_ende = ergebniszwischen + (lampenlaenge/2);[/LEFT]
 [LEFT]lampe_lampe = ergebnis_anfang_ende + (lampenlaenge/2);[/LEFT]
  [LEFT]Feld4.setText(String.[I]valueOf[/I](ergebniszwischen)); [/LEFT]
 [LEFT]Feld5.setText(String.[I]valueOf[/I](ergebnis_anfang_ende));[/LEFT]
 [LEFT]Feld6.setText(String.[I]valueOf[/I](lampe_lampe));[/LEFT]
 [LEFT]}[/LEFT]
}
[/SIZE]


Der ursprüngliche Beitrag von 18:04 Uhr wurde um 18:24 Uhr ergänzt:

Hallo!

Vielen Dank für Deine Hilfe!. Ich habe mir schon gedacht, daß mein Fehler für die "Profis" eine "Kleinigkeit" ist.
Leider weiß ich ehrlich gesagt nicht, wohin ich die Klammern setzen soll. Ich jedenfalls kriege es leider nicht hin. Nochmals tausend Dank!


Code: 
[SIZE=2][COLOR=#646464][SIZE=2][COLOR=#646464]
  [LEFT]@Override[/LEFT]
[/COLOR][/SIZE][/COLOR][/SIZE] [LEFT][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]protected[/COLOR][/SIZE][/COLOR][/SIZE][/B][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]void[/COLOR][/SIZE][/COLOR][/SIZE][/B][SIZE=2] onCreate(Bundle savedInstanceState) {[/SIZE][/LEFT]
[SIZE=2]
 [/SIZE] [LEFT][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]super[/COLOR][/SIZE][/COLOR][/SIZE][/B][SIZE=2].onCreate(savedInstanceState);[/SIZE][/LEFT]
[SIZE=2]
  [LEFT]setContentView(R.layout.[/LEFT]
[/SIZE] [LEFT][I][SIZE=2][COLOR=#0000c0][SIZE=2][COLOR=#0000c0]activity_fullscreen[/COLOR][/SIZE][/COLOR][/SIZE][/I][SIZE=2]);}[/SIZE][/LEFT]
[SIZE=2]
   [/SIZE] [LEFT][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]public[/COLOR][/SIZE][/COLOR][/SIZE][/B][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]void[/COLOR][/SIZE][/COLOR][/SIZE][/B][SIZE=2] ButtonKlick (View view) {[/SIZE][/LEFT]
[SIZE=2]
  [LEFT]setContentView(R.layout.[/LEFT]
[/SIZE] [LEFT][I][SIZE=2][COLOR=#0000c0][SIZE=2][COLOR=#0000c0]zweiteseite[/COLOR][/SIZE][/COLOR][/SIZE][/I][SIZE=2]);[/SIZE][/LEFT]
[SIZE=2]
  [/SIZE][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]int[/COLOR][/SIZE][/COLOR][/SIZE][/B][SIZE=2] gesamtlaenge;
 [/SIZE]
 
Sorry, habe etwas zu schnell gelesen. onCreate hast du ja geschlossen und erst danach dein ButtonClick.
Was mir sonst so auffallen würde ist das du auf Variablen aus den EditTexten holen willst, obwohl die nicht zum aktuellem View gehören. Also lese einmal zuerst die Texte aus den EditTexten, speicher sie in Variablen ändere dann den ContentView und dann setze die Variablen in die TextViews.

Sollte dann so aussehen:

Code: 
package de.example.abstandsapp;

import android.app.Activity;
import android.os.Bundle;
import android.view.View; 
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.TextView;

public class FullscreenActivity extends Activity {

        ImageView myImageView;
        EditText gesamtlaenge;
        EditText lampenanzahl;
        EditText lampenlaenge;
        TextView ergebniszwischen;
        TextView ergebnis_anfang_ende;
        TextView lampe_lampe;

        @Override
        protectedvoid onCreate(Bundle savedInstanceState) {
                super.onCreate(savedInstanceState);
                setContentView(R.layout.activity_fullscreen);
        }


        public void ButtonKlick (View view) {

                int gesamtlaenge;
                int lampenanzahl;
                int lampenlaenge;  
                int ergebniszwischen;
                int ergebnis_anfang_ende;
                int lampe_lampe;

                //Werte aus den EditText in Variablen
                EditText Feld1 =(EditText)findViewById(R.id.gesamtlaenge); 
                EditText Feld2 =(EditText)findViewById(R.id.lampenanzahl); 
                EditText Feld3 =(EditText)findViewById(R.id.lampenlaenge);

                if (Feld1.getText().toString().length() == 0) {return; }
                if (Feld2.getText().toString().length() == 0) {return; }
                if (Feld3.getText().toString().length() == 0) {return; }
                gesamtlaenge = Integer.parseInt(Feld1.getText().toString());
                lampenanzahl = Integer.parseInt(Feld2.getText().toString()); 
                lampenlaenge = Integer.parseInt(Feld3.getText().toString());

                ergebniszwischen = (gesamtlaenge - (lampenanzahl * lampenlaenge)) / (lampenanzahl + 1);
                ergebnis_anfang_ende = ergebniszwischen + (lampenlaenge/2);
                lampe_lampe = ergebnis_anfang_ende + (lampenlaenge/2);

                //Layout ändern und Variablen in die TextViews setzten
                setContentView(R.layout.zweiteseite); 
                TextView Feld4 =(TextView)findViewById(R.id.ergebniszwischen);
                TextView Feld5 =(TextView)findViewById(R.id.ergebnis_anfang_ende);
                TextView Feld6 =(TextView)findViewById(R.id.lampe_lampe);

                Feld4.setText(String.valueOf(ergebniszwischen)); 
                Feld5.setText(String.valueOf(ergebnis_anfang_ende));
                Feld6.setText(String.valueOf(lampe_lampe));
                //hoffentlich freuen ;)
        }
}
 
Zuletzt bearbeitet:
Hallo!

Gar kein Problem! Bin echt froh, daß mir überhaupt jemand hilft.:thumbup: War jetzt aber schon lange am Computer und muß erstmal ne Pause machen. Werde aber alles ausprobieren und mich vielleicht noch heute, spätestens morgen früh wieder melden!
Nochmals vielen Dank!!!
 
Hallo!

Es funktioniert tatsächlich. Vielen, vielen Dank für Deine Hilfe! Ich weiß gar nicht wie ich das wieder gut machen kann!:thumbsup:

Ganz herzliche Grüße

Michael
 
  • Danke
Reaktionen: joshua1996
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