如何将数据从一个activity传递到多个活动？

Question

我想把这些数据从当前的activity发送到更多的“BusinformationScard”activity。

@override public void onBindViewHolder(@nonnull ViewHolder ViewHolder,final int position）{

    viewHolder.busLineName.setText(tickets.get(position).getBusLine());
    viewHolder.seatsNumbers.setText(String.valueOf(tickets.get(position).getSeatNum()));
    viewHolder.leavingTime.setText(tickets.get(position).getLeavingTime());
    viewHolder.companyName.setText(tickets.get(position).getLeavingTime());

    viewHolder.cardView.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            // here passing data to BusInformationCard
            Intent ticketInfo = new Intent(mContext, BusInformationsCard.class);

            ticketInfo.putExtra("busLine", tickets.get(position).getBusLine());
            ticketInfo.putExtra("companyName", tickets.get(position).getCompany());
            ticketInfo.putExtra("driverName", tickets.get(position).getName());
            ticketInfo.putExtra("driverPhone", tickets.get(position).getDriverPhone());
            ticketInfo.putExtra("seatNum", tickets.get(position).getSeatNum());
            ticketInfo.putExtra("leavingTime", tickets.get(position).getLeavingTime());
            ticketInfo.putExtra("latitude", tickets.get(position).getLatitude());
            ticketInfo.putExtra("longitude", tickets.get(position).getLongitude());

            mContext.startActivity(ticketInfo);

        }
    });
}

Answer 1

您可以使用共享首选项在所有项目中使用数据。你只需要创建一个App首选项类，就像这样：-

public class AppPrefrences {

            private static SharedPreferences mPrefs;
            private static SharedPreferences.Editor mPrefsEditor;

            public static boolean isUserLoggedOut(Context ctx) {
                mPrefs = PreferenceManager.getDefaultSharedPreferences(ctx);
                return mPrefs.getBoolean("id_logged_in", true);
            }

            public static void setUserLoggedOut(Context ctx, Boolean value) {
                mPrefs = PreferenceManager.getDefaultSharedPreferences(ctx);
                mPrefsEditor = mPrefs.edit();
                mPrefsEditor.putBoolean("id_logged_in", value);
                mPrefsEditor.commit();
            }

    public static String getUserName(Context ctx) {
            mPrefs = PreferenceManager.getDefaultSharedPreferences(ctx);
            return mPrefs.getString("userName", "");
        }

        public static void setUserName(Context ctx, String value) {
            mPrefs = PreferenceManager.getDefaultSharedPreferences(ctx);
            mPrefsEditor = mPrefs.edit();
            mPrefsEditor.putString("userName", value);
            mPrefsEditor.commit();
        }

public static void clearAllPreferences(Context ctx) {
        mPrefs = PreferenceManager.getDefaultSharedPreferences(ctx);
        mPrefsEditor = mPrefs.edit();
        mPrefsEditor.clear();
        mPrefsEditor.commit();
    }
        }

现在只需调用这些方法来保存数据并获取保存的数据。创建一个自己的保存数据和获取保存数据的方法