some bugfixes (#119)

* avoid IllegalStateException in rare cases

* clear error state on edit

* new version

* ignore error if fragment unloaded

app/build.gradle

@@ -8,8 +8,8 @@ android {
         applicationId "com.m2049r.xmrwallet"
         minSdkVersion 21
         targetSdkVersion 25
-        versionCode 41
+        versionCode 42
-        versionName "1.2.1"
+        versionName "1.2.2"
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
         externalNativeBuild {
             cmake {

app/src/main/java/com/m2049r/xmrwallet/ReceiveFragment.java

@@ -116,9 +116,11 @@ public class ReceiveFragment extends Fragment {
         evAmount.setOnFailedExchangeListener(new ExchangeView.OnFailedExchangeListener() {
             @Override
             public void onFailedExchange() {
+                if (isAdded()) {
                     clearQR();
                     Toast.makeText(getActivity(), getString(R.string.message_exchange_failed), Toast.LENGTH_LONG).show();
                 }
+            }
         });
 
         etPaymentId.getEditText().setOnEditorActionListener(new TextView.OnEditorActionListener() {

app/src/main/java/com/m2049r/xmrwallet/SendFragment.java

@@ -24,7 +24,9 @@ import android.support.annotation.Nullable;
 import android.support.design.widget.TextInputLayout;
 import android.support.v4.app.Fragment;
 import android.support.v7.app.AlertDialog;
+import android.text.Editable;
 import android.text.InputType;
+import android.text.TextWatcher;
 import android.util.Log;
 import android.view.KeyEvent;
 import android.view.LayoutInflater;
@@ -137,6 +139,21 @@ public class SendFragment extends Fragment {
             }
         });
 
+        etAddress.getEditText().addTextChangedListener(new TextWatcher() {
+            @Override
+            public void afterTextChanged(Editable editable) {
+                etAddress.setError(null);
+            }
+
+            @Override
+            public void beforeTextChanged(CharSequence s, int start, int count, int after) {
+            }
+
+            @Override
+            public void onTextChanged(CharSequence s, int start, int before, int count) {
+            }
+        });
+
         etPaymentId.getEditText().setOnEditorActionListener(new TextView.OnEditorActionListener() {
             public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
                 if ((event != null && (event.getKeyCode() == KeyEvent.KEYCODE_ENTER)) || (actionId == EditorInfo.IME_ACTION_DONE)) {
@@ -150,6 +167,21 @@ public class SendFragment extends Fragment {
             }
         });
 
+        etPaymentId.getEditText().addTextChangedListener(new TextWatcher() {
+            @Override
+            public void afterTextChanged(Editable editable) {
+                etPaymentId.setError(null);
+            }
+
+            @Override
+            public void beforeTextChanged(CharSequence s, int start, int count, int after) {
+            }
+
+            @Override
+            public void onTextChanged(CharSequence s, int start, int before, int count) {
+            }
+        });
+
         bPrepareSend.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {
@@ -234,6 +266,7 @@ public class SendFragment extends Fragment {
                 parentView.post(new Runnable() {
                     @Override
                     public void run() {
+                        if (isAdded())
                             ((TextView) parentView.getChildAt(0)).setTextColor(getResources().getColor(R.color.moneroGray));
                     }
                 });
@@ -250,6 +283,7 @@ public class SendFragment extends Fragment {
                 parentView.post(new Runnable() {
                     @Override
                     public void run() {
+                        if (isAdded())
                             ((TextView) parentView.getChildAt(0)).setTextColor(getResources().getColor(R.color.moneroGray));
                     }
                 });