refactor magic number (#756)

app/src/main/java/com/m2049r/xmrwallet/data/TxData.java

@@ -21,6 +21,7 @@ import android.os.Parcelable;
 
 import com.m2049r.xmrwallet.model.PendingTransaction;
 import com.m2049r.xmrwallet.model.Wallet;
+import com.m2049r.xmrwallet.util.Helper;
 
 // https://stackoverflow.com/questions/2139134/how-to-send-an-object-from-one-android-activity-to-another-using-intents
 public class TxData implements Parcelable {
@@ -54,7 +55,7 @@ public class TxData implements Parcelable {
     }
 
     public double getAmountAsDouble() {
-        return 1.0 * amount / 1000000000000L;
+        return 1.0 * amount / Helper.ONE_XMR;
     }
 
     public int getMixin() {

app/src/main/java/com/m2049r/xmrwallet/fragment/send/SendAmountWizardFragment.java

@@ -139,7 +139,7 @@ public class SendAmountWizardFragment extends SendWizardFragment {
         Timber.d("onResumeFragment()");
         Helper.showKeyboard(getActivity());
         final long funds = getTotalFunds();
-        maxFunds = 1.0 * funds / 1000000000000L;
+        maxFunds = 1.0 * funds / Helper.ONE_XMR;
         if (!sendListener.getActivityCallback().isStreetMode()) {
             tvFunds.setText(getString(R.string.send_available,
                     Wallet.getDisplayAmount(funds)));

app/src/main/java/com/m2049r/xmrwallet/fragment/send/SendBtcAmountWizardFragment.java

@@ -34,6 +34,7 @@ import com.m2049r.xmrwallet.service.shift.ShiftException;
 import com.m2049r.xmrwallet.service.shift.sideshift.api.QueryOrderParameters;
 import com.m2049r.xmrwallet.service.shift.sideshift.api.SideShiftApi;
 import com.m2049r.xmrwallet.service.shift.sideshift.network.SideShiftApiImpl;
+import com.m2049r.xmrwallet.util.Helper;
 import com.m2049r.xmrwallet.util.OkHttpHelper;
 import com.m2049r.xmrwallet.util.ServiceHelper;
 import com.m2049r.xmrwallet.widget.ExchangeOtherEditText;
@@ -179,7 +180,7 @@ public class SendBtcAmountWizardFragment extends SendWizardFragment {
             tvXmrToParms.setText(xmrParmText);
 
             final long funds = getTotalFunds();
-            double availableXmr = 1.0 * funds / 1000000000000L;
+            double availableXmr = 1.0 * funds / Helper.ONE_XMR;
 
             String availBtcString;
             String availXmrString;

app/src/main/java/com/m2049r/xmrwallet/util/Helper.java

@@ -81,6 +81,7 @@ public class Helper {
 
     static public final String BASE_CRYPTO = Crypto.XMR.getSymbol();
     static public final int XMR_DECIMALS = 12;
+    static public final long ONE_XMR = Math.round(Math.pow(10, Helper.XMR_DECIMALS));
 
     static public final boolean SHOW_EXCHANGERATES = true;
     static public final boolean ALLOW_SHIFT = true;

app/src/main/java/com/m2049r/xmrwallet/widget/ExchangeEditText.java

@@ -349,11 +349,13 @@ public class ExchangeEditText extends LinearLayout {
         }
     }
 
+    private static final String CLEAN_FORMAT = "%." + Helper.XMR_DECIMALS + "f";
+
     private String getCleanAmountString(String enteredAmount) {
         try {
             double amount = Double.parseDouble(enteredAmount);
             if (amount >= 0) {
-                return String.format(Locale.US, "%,.12f", amount);
+                return String.format(Locale.US, CLEAN_FORMAT, amount);
             } else {
                 return null;
             }