我遇到了问题所以我遇到了问题。
enter image description here 在扫描活动中，扫描QR码并生成卡数据，然后当值匹配时，我们转到下一个活动，我们将显示下一个值。单击Next按钮并转到我们的数据列表。询问如何从ScanActivity.class活动卡数据中获取并添加列表
来自ScanActitivty.java的代码
if (!p.matcher(decodedBarcodeValue).matches()) {
showAlterDialog("Błędny QR Kod", "Podany kod QR code jest błędny. Zeskanuj go ponownie.");
} else {
Matcher m = p.matcher(decodedBarcodeValue);
while (m.find()) {
daneKarty[index] = m.group(1);
index++;
}
if (daneKarty.length < 6) {
showAlterDialog("Błędny QR Kod", "Podany Kod jest nieprawidłowy");
}
sciezka3 = daneKarty[0];
base32 = daneKarty[1];
nameCard = daneKarty[2];
intervalTotp = daneKarty[3];
passwordHotp = daneKarty[4];
expirationDate = daneKarty[5];
if (intervalTotp.equals("")) {
intervalTotp = "60";
}
try {
OTP = generateOTP(base32, uuidDevice);
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
Base32 code = new Base32();
byte secret[] = code.decode(OTP);
try {
hotpValue = Hotp.generateHotp(secret, hotp_counter, 6);
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
} catch (InvalidKeyException e) {
e.printStackTrace();
}
if (hotpValue.equals(passwordHotp)) {
Intent intent = new Intent(ScanQrCodeActivity.this, Stage3Activity.class);
intent.putExtra(EXTRA_MESSAGE, hotpValue);
startActivityForResult(intent, REQUEST_CODE);
} else {
showAlterDialog("Błędny QR Kod", "Podany Kod jest nieprawidłowy");
}
Stage3Activity.class
public class Stage3Activity extends AppCompatActivity {
private String hotpValueString;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_stage3);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
toolbar.setNavigationIcon(R.drawable.ic_restart);
hotpValueString = getIntent().getStringExtra("hotpValume");
Typeface custom_fonts = Typeface.createFromAsset(getAssets(), "fonts/OpenSans-Regular.ttf");
Typeface custom_fonts2 = Typeface.createFromAsset(getAssets(), "fonts/OpenSans-Bold.ttf");
TextView title_activity = (TextView) findViewById(R.id.stage3TileActivity);
title_activity.setTypeface(custom_fonts);
TextView stageOneText = (TextView) findViewById(R.id.stageOneText);
stageOneText.setTypeface(custom_fonts);
TextView stageTwoText = (TextView) findViewById(R.id.stageTwoText);
stageTwoText.setTypeface(custom_fonts);
TextView stageThreeText = (TextView) findViewById(R.id.stageThreeText);
stageThreeText.setTypeface(custom_fonts);
TextView messageView = (TextView) findViewById(R.id.QuestionTextView);
messageView.setTypeface(custom_fonts);
TextView valueHotp = (TextView) findViewById(R.id.valueHotpTextView);
valueHotp.setTypeface(custom_fonts2);
valueHotp.setText(hotpValueString);
TextView yesButton = (TextView) findViewById(R.id.yesButton);
yesButton.setTypeface(custom_fonts);
yesButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(Stage3Activity.this, MainActivity.class);
startActivity(intent);
}
});
}
MainActivity.class
public class MainActivity extends AppCompatActivity {
public List<Card> cardList = new ArrayList<>();
@Override
protected void attachBaseContext(Context newBase) {
super.attachBaseContext(newBase);
}
private RecyclerView cardRecyclerView;
private RecyclerView.Adapter mAdapter;
private RecyclerView.LayoutManager mLayoutManager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
Typeface custom_fonts = Typeface.createFromAsset(getAssets(), "fonts/OpenSans-Regular.ttf");
cardRecyclerView = (RecyclerView) findViewById(R.id.cardViewRecycleView);
mLayoutManager = new LinearLayoutManager(this);
cardRecyclerView.setLayoutManager(mLayoutManager);
// title application
TextView title_app = (TextView) findViewById(R.id.toolbar_title);
title_app.setTypeface(custom_fonts);
}
班级
public class Card {
private String nameCard;
private String dateCard;
private String dateExpiration;
public Card(String nameCard, String dateCard, String dateExpiration) {
this.nameCard = nameCard;
this.dateCard = dateCard;
this.dateExpiration = dateExpiration;
}
public String getNameCard() {
return nameCard;
}
public void setNameCard(String nameCard) {
this.nameCard = nameCard;
}
public String getDateCard() {
return dateCard;
}
public void setDateCard(String dateCard) {
this.dateCard = dateCard;
}
public String getDateExpiration() {
return dateExpiration;
}
public void setDateExpiration(String dateExpiration) {
this.dateExpiration = dateExpiration;
}
}
CardAdapter.class
public class CardAdapter extends RecyclerView.Adapter<CardAdapter.CardViewHolder> {
private List<Card> cardsList = new ArrayList<>();
private Card card;
public CardAdapter( List<Card> cardsList) {
this.cardsList = cardsList;
}
//dodaj obiekt do listy
private void addItem(int position, Card card) {
cardsList.add(position, card);
notifyItemChanged(position);
}
public class CardViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
public CardView cardview;
public TextView nameCard, dateText, setDateText, dateExpirationText, setDateExpirationText;
public ImageView mImageButton;
Typeface custom_fonts = Typeface.createFromAsset(itemView.getContext().getAssets(), "fonts/OpenSans-Regular.ttf");
public CardViewHolder(View itemView) {
super(itemView);
// name Card
nameCard = (TextView) itemView.findViewById(R.id.nameCard);
nameCard.setTypeface(custom_fonts);
//data add Card
setDateText = (TextView) itemView.findViewById(R.id.setDateText);
setDateText.setTypeface(custom_fonts);
dateText = (TextView) itemView.findViewById(R.id.dateText);
dateText.setTypeface(custom_fonts);
mImageButton = (ImageView) itemView.findViewById(R.id.garbageDelete);
//data expiration date
dateExpirationText = (TextView) itemView.findViewById(R.id.dateExpiration);
dateExpirationText.setTypeface(custom_fonts);
//
setDateExpirationText = (TextView) itemView.findViewById(R.id.setDateExpirationText);
setDateExpirationText.setTypeface(custom_fonts);
cardview = (CardView) itemView.findViewById(R.id.cardView);
cardview.setOnClickListener(this);
}
@Override
public void onClick(View v) {
Context context = itemView.getContext();
Intent intent = new Intent(context, CardDetailsActivity.class);
context.startActivity(intent);
}
}
@Override
public CardViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View itemView = LayoutInflater.
from(parent.getContext()).
inflate(R.layout.item_cardview, parent, false);
return new CardViewHolder(itemView);
}
@Override
public void onBindViewHolder(final CardViewHolder holder, final int position) {
Card Card = cardsList.get(position);
holder.nameCard.setText(Card.getNameCard());
holder.dateText.setText(R.string.data_dodania);
holder.setDateText.setText(Card.getDateCard());
holder.mImageButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
showPopupMenu(holder.mImageButton, position);
}
});
}
答案 0 :(得分：-1)
如果我理解正确，您想要的只是在Activities之间传递数据，则可以使用Bundles执行此操作。
在这里，你回答了同样的问题： How should I communicate between activities?
有关更复杂的数据，请查看此处：How to send an object from one Android Activity to another using Intents?