- Changing main thread db queries to be executed in a room observer way
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303011e419
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62edb37143
2 changed files with 67 additions and 49 deletions
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@ -23,6 +23,9 @@ public interface CryptoCurrencyDao {
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@Query("SELECT * FROM crypto_currency WHERE id = :id")
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CryptoCurrency getById(long id);
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@Query("SELECT * FROM crypto_currency WHERE id = :id")
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LiveData<CryptoCurrency> getLDById(long id);
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@Query("SELECT * FROM crypto_currency WHERE name = :name AND crypto_net = :cryptoNet")
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CryptoCurrency getByNameAndCryptoNet(String name,String cryptoNet);
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@ -69,66 +69,81 @@ public class CryptoCoinBalanceViewHolder extends RecyclerView.ViewHolder {
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this.clear();
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} else {
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//Retrieves the preferred currency selected by the user
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LiveData<GeneralSetting> preferedCurrencySetting = CrystalDatabase.getAppDatabase(this.context).generalSettingDao().getByName(GeneralSetting.SETTING_NAME_PREFERRED_CURRENCY);
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final LiveData<GeneralSetting> preferedCurrencySetting = CrystalDatabase.getAppDatabase(this.context).generalSettingDao().getByName(GeneralSetting.SETTING_NAME_PREFERRED_CURRENCY);
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//Retrieves the currency of this balance
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final CryptoCurrency currencyFrom = CrystalDatabase.getAppDatabase(context).cryptoCurrencyDao().getById(balance.getCryptoCurrencyId());
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//Sets the name and amount of the balance in the view
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String balanceString = String.format("%.2f",balance.getBalance()/Math.pow(10,currencyFrom.getPrecision()));
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cryptoCoinName.setText(currencyFrom.getName());
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cryptoCoinBalance.setText(balanceString);
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//final CryptoCurrency currencyFrom = CrystalDatabase.getAppDatabase(context).cryptoCurrencyDao().getById(balance.getCryptoCurrencyId());
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LiveData<CryptoCurrency> currencyFromLD = CrystalDatabase.getAppDatabase(context).cryptoCurrencyDao().getLDById(balance.getCryptoCurrencyId());
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//Observes the preferred currency of the user. If the user changes it, this will change the equivalent value
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preferedCurrencySetting.observe((LifecycleOwner) this.context, new Observer<GeneralSetting>() {
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currencyFromLD.observe((LifecycleOwner) this.context, new Observer<CryptoCurrency>() {
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@Override
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public void onChanged(@Nullable GeneralSetting generalSetting) {
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if (generalSetting != null) {
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//Gets the currency object of the preferred currency
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LiveData<CryptoCurrency> currencyToLiveData = CrystalDatabase.getAppDatabase(context).cryptoCurrencyDao().getLiveDataByName(generalSetting.getValue());
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public void onChanged(@Nullable final CryptoCurrency currencyFrom) {
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//Sets the name and amount of the balance in the view
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String balanceString = String.format("%.2f",balance.getBalance()/Math.pow(10,currencyFrom.getPrecision()));
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cryptoCoinName.setText(currencyFrom.getName());
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cryptoCoinBalance.setText(balanceString);
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currencyToLiveData.observe((LifecycleOwner) context, new Observer<CryptoCurrency>() {
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@Override
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public void onChanged(@Nullable CryptoCurrency cryptoCurrency) {
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if (cryptoCurrency != null) {
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CryptoCurrency currencyTo = cryptoCurrency;
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//Observes the preferred currency of the user. If the user changes it, this will change the equivalent value
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preferedCurrencySetting.observe((LifecycleOwner) context, new Observer<GeneralSetting>() {
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@Override
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public void onChanged(@Nullable GeneralSetting generalSetting) {
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if (generalSetting != null) {
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//Gets the currency object of the preferred currency
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LiveData<CryptoCurrency> currencyToLiveData = CrystalDatabase.getAppDatabase(context).cryptoCurrencyDao().getLiveDataByName(generalSetting.getValue());
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//Retrieves the equivalent value of this balance using the "From" currency and the "To" currency
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LiveData<CryptoCurrencyEquivalence> currencyEquivalenceLiveData = CrystalDatabase.getAppDatabase(context)
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.cryptoCurrencyEquivalenceDao().getByFromTo(
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currencyTo.getId(),
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currencyFrom.getId()
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currencyToLiveData.observe((LifecycleOwner) context, new Observer<CryptoCurrency>() {
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@Override
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public void onChanged(@Nullable CryptoCurrency cryptoCurrency) {
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if (cryptoCurrency != null) {
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CryptoCurrency currencyTo = cryptoCurrency;
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);
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//Retrieves the equivalent value of this balance using the "From" currency and the "To" currency
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LiveData<CryptoCurrencyEquivalence> currencyEquivalenceLiveData = CrystalDatabase.getAppDatabase(context)
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.cryptoCurrencyEquivalenceDao().getByFromTo(
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currencyTo.getId(),
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currencyFrom.getId()
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//Observes the equivalent value. If the equivalent value changes, this will keep the value showed correct
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currencyEquivalenceLiveData.observe((LifecycleOwner) context, new Observer<CryptoCurrencyEquivalence>() {
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@Override
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public void onChanged(@Nullable CryptoCurrencyEquivalence cryptoCurrencyEquivalence) {
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if (cryptoCurrencyEquivalence != null) {
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CryptoCurrency toCurrency = CrystalDatabase.getAppDatabase(context).cryptoCurrencyDao().getById(cryptoCurrencyEquivalence.getFromCurrencyId());
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double equivalentValue = 0;
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String equivalenceString = "";
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if (cryptoCurrencyEquivalence.getValue() > 0) {
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equivalentValue = (balance.getBalance() / Math.pow(10, currencyFrom.getPrecision())) /
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(cryptoCurrencyEquivalence.getValue() / Math.pow(10, toCurrency.getPrecision()));
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equivalenceString = String.format(
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"%.2f",
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equivalentValue
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);
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} else {
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equivalentValue = 0;
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equivalenceString = "0";
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}
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cryptoNetBalanceViewHolder.setEquivalentBalance(balance,equivalentValue);
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cryptoCoinBalanceEquivalence.setText(
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equivalenceString + " " + toCurrency.getName());
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}
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//Observes the equivalent value. If the equivalent value changes, this will keep the value showed correct
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currencyEquivalenceLiveData.observe((LifecycleOwner) context, new Observer<CryptoCurrencyEquivalence>() {
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@Override
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public void onChanged(final @Nullable CryptoCurrencyEquivalence cryptoCurrencyEquivalence) {
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if (cryptoCurrencyEquivalence != null) {
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LiveData<CryptoCurrency> toCurrencyLD = CrystalDatabase.getAppDatabase(context).cryptoCurrencyDao().getLDById(cryptoCurrencyEquivalence.getFromCurrencyId());
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toCurrencyLD.observe((LifecycleOwner) context, new Observer<CryptoCurrency>() {
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@Override
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public void onChanged(@Nullable CryptoCurrency toCurrency) {
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double equivalentValue = 0;
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String equivalenceString = "";
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if (cryptoCurrencyEquivalence.getValue() > 0) {
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equivalentValue = (balance.getBalance() / Math.pow(10, currencyFrom.getPrecision())) /
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(cryptoCurrencyEquivalence.getValue() / Math.pow(10, toCurrency.getPrecision()));
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equivalenceString = String.format(
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"%.2f",
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equivalentValue
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);
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} else {
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equivalentValue = 0;
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equivalenceString = "0";
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}
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cryptoNetBalanceViewHolder.setEquivalentBalance(balance,equivalentValue);
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cryptoCoinBalanceEquivalence.setText(
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equivalenceString + " " + toCurrency.getName());
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}
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});
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}
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}
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});
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}
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});
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}
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}
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});
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}
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});
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}
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}
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});
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}
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});
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}
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