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POAndroid SQLiteHelper problem
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  1. POAndroid SQLiteHelper problem
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    copied!<p>I am learning how to make Android apps, and the app I am working on needs a database that is filled at startup, then only read from.</p> <p>I am getting an error at start-up when trying to get an SQLiteDatabase instance.</p> <p>My DatabaseManager Constructor:</p> <pre><code>public DatabaseManager(Context context) { Log.d("Database Manager", "Database Manager Constructor"); CustomSQLiteOpenHelper helper = new CustomSQLiteOpenHelper(context); db = helper.getReadableDatabase(); Log.d("Database Manager", db.toString()); Log.d("Database ", db.getPath()); } </code></pre> <p>The error is in the line where I try the getReadableDatabase() method.</p> <p>This is a stub from my SQLiteHelper class, if it is usefull:</p> <pre><code>public class CustomSQLiteOpenHelper extends SQLiteOpenHelper { public CustomSQLiteOpenHelper(Context context) { super(context, DATABASE_NAME, null, DATABASE_VERSION); Log.d("Database Manager", "Helper Constructor"); // TODO Auto-generated constructor stub } @Override public void onCreate(SQLiteDatabase db) { Log.v("Database Manager", "In onCreate Method"); //deleteAllTables(db); initializeTables(db); fillMonstersTable(db); } } </code></pre> <p>LogCat when I get the error:</p> <pre><code>ERROR/AndroidRuntime(366): FATAL EXCEPTION: main ERROR/AndroidRuntime(366): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{dk.thediabloman.descenthelper/dk.thediabloman.descenthelper.DescentApp}: java.lang.NullPointerException ERROR/AndroidRuntime(366): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2585) ERROR/AndroidRuntime(366): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679) ERROR/AndroidRuntime(366): at android.app.ActivityThread.access$2300(ActivityThread.java:125) ERROR/AndroidRuntime(366): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033) ERROR/AndroidRuntime(366): at android.os.Handler.dispatchMessage(Handler.java:99) ERROR/AndroidRuntime(366): at android.os.Looper.loop(Looper.java:123) ERROR/AndroidRuntime(366): at android.app.ActivityThread.main(ActivityThread.java:4627) ERROR/AndroidRuntime(366): at java.lang.reflect.Method.invokeNative(Native Method) ERROR/AndroidRuntime(366): at java.lang.reflect.Method.invoke(Method.java:521) ERROR/AndroidRuntime(366): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) ERROR/AndroidRuntime(366): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) ERROR/AndroidRuntime(366): at dalvik.system.NativeStart.main(Native Method) ERROR/AndroidRuntime(366): Caused by: java.lang.NullPointerException ERROR/AndroidRuntime(366): at android.content.ContextWrapper.openOrCreateDatabase(ContextWrapper.java:203) ERROR/AndroidRuntime(366): at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:98) ERROR/AndroidRuntime(366): at android.database.sqlite.SQLiteOpenHelper.getReadableDatabase(SQLiteOpenHelper.java:158) ERROR/AndroidRuntime(366): at dk.thediabloman.descenthelper.DatabaseManager.&lt;init&gt;(DatabaseManager.java:52) ERROR/AndroidRuntime(366): at dk.thediabloman.descenthelper.DescentApp.&lt;init&gt;(DescentApp.java:18) ERROR/AndroidRuntime(366): at java.lang.Class.newInstanceImpl(Native Method) ERROR/AndroidRuntime(366): at java.lang.Class.newInstance(Class.java:1429) ERROR/AndroidRuntime(366): at android.app.Instrumentation.newActivity(Instrumentation.java:1021) ERROR/AndroidRuntime(366): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2577) </code></pre> <p>Thanks for the help!</p>
 

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