sqlite-App startet nicht,Fehler im Code?

107-30 13:58:57.161: I/Process(1003): Sending signal. PID: 1003 SIG: 9
207-30 14:09:36.011: I/dalvikvm(1044): threadid=3: reacting to signal 3
307-30 14:09:36.211: I/dalvikvm(1044): Wrote stack traces to '/data/anr/traces.txt'
407-30 14:09:36.261: D/dalvikvm(1044): newInstance failed: no <init>()
507-30 14:09:36.301: D/AndroidRuntime(1044): Shutting down VM
607-30 14:09:36.331: W/dalvikvm(1044): threadid=1: thread exiting with uncaught exception (group=0x409c01f8)
707-30 14:09:36.411: E/AndroidRuntime(1044): FATAL EXCEPTION: main
807-30 14:09:36.411: E/AndroidRuntime(1044): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{ch.dbtut/ch.dbtut.DBTutActivity}: java.lang.InstantiationException: can't instantiate class ch.dbtut.DBTutActivity; no empty constructor
907-30 14:09:36.411: E/AndroidRuntime(1044): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1880)
1007-30 14:09:36.411: E/AndroidRuntime(1044): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
1107-30 14:09:36.411: E/AndroidRuntime(1044): at android.app.ActivityThread.access$600(ActivityThread.java:123)
1207-30 14:09:36.411: E/AndroidRuntime(1044): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
1307-30 14:09:36.411: E/AndroidRuntime(1044): at android.os.Handler.dispatchMessage(Handler.java:99)
1407-30 14:09:36.411: E/AndroidRuntime(1044): at android.os.Looper.loop(Looper.java:137)
1507-30 14:09:36.411: E/AndroidRuntime(1044): at android.app.ActivityThread.main(ActivityThread.java:4424)
1607-30 14:09:36.411: E/AndroidRuntime(1044): at java.lang.reflect.Method.invokeNative(Native Method)
1707-30 14:09:36.411: E/AndroidRuntime(1044): at java.lang.reflect.Method.invoke(Method.java:511)
1807-30 14:09:36.411: E/AndroidRuntime(1044): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
1907-30 14:09:36.411: E/AndroidRuntime(1044): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
2007-30 14:09:36.411: E/AndroidRuntime(1044): at dalvik.system.NativeStart.main(Native Method)
2107-30 14:09:36.411: E/AndroidRuntime(1044): Caused by: java.lang.InstantiationException: can't instantiate class ch.dbtut.DBTutActivity; no empty constructor
2207-30 14:09:36.411: E/AndroidRuntime(1044): at java.lang.Class.newInstanceImpl(Native Method)
2307-30 14:09:36.411: E/AndroidRuntime(1044): at java.lang.Class.newInstance(Class.java:1319)
2407-30 14:09:36.411: E/AndroidRuntime(1044): at android.app.Instrumentation.newActivity(Instrumentation.java:1023)
2507-30 14:09:36.411: E/AndroidRuntime(1044): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1871)
2607-30 14:09:36.411: E/AndroidRuntime(1044): ... 11 more
2707-30 14:09:36.691: I/dalvikvm(1044): threadid=3: reacting to signal 3
2807-30 14:09:36.771: I/dalvikvm(1044): Wrote stack traces to '/data/anr/traces.txt'
2907-30 14:09:37.051: I/dalvikvm(1044): threadid=3: reacting to signal 3
3007-30 14:09:37.121: I/dalvikvm(1044): Wrote stack traces to '/data/anr/traces.txt'

1package ch.dbtut;
2
3import android.os.Bundle;
4import android.app.Activity;
5import android.util.Log;
6import android.view.Menu;
7import android.view.MenuItem;
8import android.support.v4.app.NavUtils;
9
10public class Star extends Activity {
11
12 private Activity activity;
13
14 @Override
15 public void onCreate(Bundle savedInstanceState) {
16 super.onCreate(savedInstanceState);
17 setContentView(R.layout.main);
18 activity = this;
19 Log.d("Ich bin der TAG","StarActivity");
20
21 String sql ="CREATE TABLE testtabelle (id INTEGER PRIMARY KEY AUTOINCREMENT,start DATE,ende DATE,anzahlLektionen int,klasse VARCHAR(50), zimmername VARCHAR(50),bezeichnung VARCHAR(50));";
22
23 DBTutActivity test = new DBTutActivity(activity,"viewtabelle",sql);
24 }
25
26 @Override
27 public boolean onCreateOptionsMenu(Menu menu) {
28 getMenuInflater().inflate(R.menu.activity_star, menu);
29 return true;
30 }
31
32
33}

1package ch.dbtut;
2
3import android.app.Activity;
4import android.content.ContentValues;
5import android.content.Context;
6import android.database.sqlite.SQLiteDatabase;
7import android.database.sqlite.SQLiteDatabase.CursorFactory;
8import android.database.sqlite.SQLiteOpenHelper;
9import android.os.Bundle;
10import android.util.Log;
11import android.view.Menu;
12
13public class DBTutActivity extends SQLiteOpenHelper {
14
15 // bietet Methoden Verwalten einer SQLite-Datenbank. Dazu gehören das
16 // Erstellen und Löschen von Datenbanken und Tabellen, sowie das Ausführen
17 // von SQLAnweisungen.
18 private SQLiteDatabase myDB;
19 private String dBTabelle;
20 private String tabellenSQL;
21
22
23 public DBTutActivity(Context activity, String dbName, String sql) {
24
25 super(activity, dbName, null, 1);
26 Log.d("Konstruktur","Ich bin im Konstruktor");
27
28 this.tabellenSQL = sql.toUpperCase();
29
30 // onCreate(myDB );
31 this.myDB = getWritableDatabase();
32 DatensatzStpl ds = new DatensatzStpl(1232, 12345, 5, "IT-0912", "202",
33 "Progammierung");
34
35 datenSatzErstellen(ds);
36
37 }
38
39 @Override
40 public synchronized void close() {
41 // TODO Auto-generated method stub
42 if (myDB != null) {
43 myDB.close();
44 myDB = null;
45 }
46 super.close();
47 }
48
49 @Override
50 public void onCreate(SQLiteDatabase db) {
51 try {
52 myDB.execSQL(tabellenSQL);
53 Log.d("carpelibrum", "datenbank wird angelegt");
54 } catch (Exception ex) {
55 Log.e("carpediam", ex.getMessage());
56 }
57
58 }
59
60 @Override
61 public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
62 // TODO Auto-generated method stub
63
64 }
65
66 public long datenSatzErstellen(DatensatzStpl ds) {
67
68 ContentValues daten = new ContentValues();
69 daten.put("start", ds.start);
70 daten.put("ende", ds.ende);
71 daten.put("anzahlLektionen", ds.anzahlLektionen);
72 daten.put("klasse", ds.klasse);
73 daten.put("zimmername", ds.zimmername);
74 daten.put("bezeichnung", ds.bezeichnung);
75
76 return myDB.insert(dBTabelle, null, daten);
77
78 }
79}

107-30 19:31:10.942: E/AndroidRuntime(568): FATAL EXCEPTION: main
207-30 19:31:10.942: E/AndroidRuntime(568): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.test8/com.example.test8.MainActivity}: java.lang.NullPointerException: println needs a message
307-30 19:31:10.942: E/AndroidRuntime(568): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1956)