Error SQLiteDatabase db = this.getWritableDatabase (); [closed]

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Error SQLiteDatabase db = this.getWritableDatabase (); [closed]

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#1 by (1 votes)

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public ArrayList<String> addMigracaoCadIndividual(String QUERY){
    SQLiteDatabase db = this.getWritableDatabase();
    return null;
}

java.lang.NullPointerException at android.content.ContextWrapper.openOrCreateDatabase (ContextWrapper.java:285) at android.database.sqlite.SQLiteOpenHelper.getDatabaseLocked (SQLiteOpenHelper.java:224) at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase (SQLiteOpenHelper.java:164) at .com.sisam.BancoDandos.addMigracaoCadIndividual (BancoDandos.java:565) at server.servers.servers.servers.servers at br.com.itconect.sisam.EnvoteDatesPhp.onPostExecute (SendDatesPhp.java:70) at br.com.itconect.sisam.EnvoteDatesPhp.onPostExecute (SendDatesPhp.java:14) at android.os.AsyncTask.finish (AsyncTask.java:632) at android.os.AsyncTask.access $ 600 (AsyncTask.java:177) at android.os.AsyncTask $ InternalHandler.handleMessage (AsyncTask.java:645) at android.os.Handler.dispatchMessage (Handler.java:110) at android.os.Looper.loop (Looper.java:193) at android.app.ActivityThread.main (ActivityThread.java:5299) at java.lang.reflect.Method.invokeNative (Native Method) at java.lang.reflect.Method.invoke (Method.java:515) at com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run (ZygoteInit.java:836) at com.android.internal.os.ZygoteInit.main (ZygoteInit.java:652) at dalvik.system.NativeStart.main (Native Method)

java android sqlite async

asked by anonymous 09.04.2018 / 20:48

1 answer

PHP result on the same screen Remove object from current array in foreach?

score 1 · Answer 1

Of course, you are returning null . The part of the code that calls addMigracaoCadIndividual(s) must be expecting something other than null (a ArrayList Strings , in this case).

Try this:

public ArrayList<String> addMigracaoCadIndividual(String QUERY){
    SQLiteDatabase db = this.getWritableDatabase();
    ArrayList<String> resultado = new ArrayList<>();
    // Pegue Strings do banco e coloque na ArrayList aqui.
    // Pesquise por exemplos de SQLite para Android no Google.
    resultado.add("Este é só um exemplo");
    return resultado;
}