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Hm, das Problem ist, ich hab in der SheetActivity nichts in einem Konstruktor.

Weißt du, ich habe Wochen, Monate an meiner ersten App gesessen und diese sogar zum funktionieren gebracht und in den Playstore geladen...und DENNOCH verstehe ich gerade mal die Hälfte dessen, was du versucht hast, mir zu sagen 😓 es ist so ärgerlich

[CODE=java]package com.manticore.manticorekartenlegen;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;

import android.widget.ImageView;

import android.widget.TextView;

public class SheetActivity extends AppCompatActivity {

    private CardReadActivity cra = new CardReadActivity();

    private Cards crd = new Cards();

    private CardNames crdNames = new CardNames();

    private CardDescriptions crdDescr = new CardDescriptions();

    private ImageView imgCardHolder;

    private TextView textCardTitle, textCardContent;

    private int resIDA;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_sheet);

        textCardTitle = findViewById(R.id.textCardTitle);

        textCardContent = findViewById(R.id.textCardContent);

        imgCardHolder = findViewById(R.id.imgCardHolder);

        WhichCard();

    }

    public void WhichCard(){

        textCardTitle.setText(crdNames.cardName[cra.cardCount]);

        resIDA = getResources().getIdentifier(crd.card[cra.cardCount], "drawable", getPackageName());

        imgCardHolder.setImageResource(resIDA);

        textCardContent.setText(crdDescr.cardDescription[cra.cardCount]);

    }

}

[/CODE]