Do not create two accounts when pressing enter for account creation

Fixes #1367

briar-android/src/main/java/org/briarproject/briar/android/login/PasswordFragment.java

@@ -22,6 +22,7 @@ import javax.annotation.Nullable;
 import static android.content.Context.INPUT_METHOD_SERVICE;
 import static android.view.View.INVISIBLE;
 import static android.view.View.VISIBLE;
+import static android.view.inputmethod.EditorInfo.IME_ACTION_DONE;
 import static org.briarproject.bramble.api.crypto.PasswordStrengthEstimator.QUITE_WEAK;
 
 @MethodsNotNullByDefault
@@ -78,6 +79,7 @@ public class PasswordFragment extends SetupFragment {
 		// the controller is not yet available in onCreateView()
 		if (!setupController.needToShowDozeFragment()) {
 			nextButton.setText(R.string.create_account_button);
+			passwordConfirmation.setImeOptions(IME_ACTION_DONE);
 		}
 	}
 

briar-android/src/main/java/org/briarproject/briar/android/login/SetupFragment.java

 package org.briarproject.briar.android.login;
 
+import android.support.annotation.Nullable;
 import android.text.Editable;
 import android.text.TextWatcher;
 import android.view.KeyEvent;
@@ -10,13 +11,18 @@ import android.view.View.OnClickListener;
 import android.widget.TextView;
 import android.widget.TextView.OnEditorActionListener;
 
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.briar.R;
 import org.briarproject.briar.android.fragment.BaseFragment;
 
 import javax.inject.Inject;
 
+import static android.view.inputmethod.EditorInfo.IME_ACTION_DONE;
+import static android.view.inputmethod.EditorInfo.IME_ACTION_NEXT;
+import static org.briarproject.briar.android.util.UiUtils.enterPressed;
 import static org.briarproject.briar.android.util.UiUtils.showOnboardingDialog;
 
+@NotNullByDefault
 abstract class SetupFragment extends BaseFragment implements TextWatcher,
 		OnEditorActionListener, OnClickListener {
 
@@ -55,9 +61,13 @@ abstract class SetupFragment extends BaseFragment implements TextWatcher,
 
 	@Override
 	public boolean onEditorAction(TextView textView, int actionId,
-			KeyEvent keyEvent) {
-		onClick(textView);
-		return true;
+			@Nullable KeyEvent keyEvent) {
+		if (actionId == IME_ACTION_NEXT || actionId == IME_ACTION_DONE ||
+				enterPressed(actionId, keyEvent)) {
+			onClick(textView);
+			return true;
+		}
+		return false;
 	}
 
 	@Override

briar-android/src/main/java/org/briarproject/briar/android/util/UiUtils.java

@@ -11,6 +11,7 @@ import android.os.PowerManager;
 import android.support.annotation.AttrRes;
 import android.support.annotation.ColorInt;
 import android.support.annotation.ColorRes;
+import android.support.annotation.Nullable;
 import android.support.design.widget.TextInputLayout;
 import android.support.v4.app.FragmentManager;
 import android.support.v4.content.ContextCompat;
@@ -27,6 +28,7 @@ import android.text.style.ClickableSpan;
 import android.text.style.ForegroundColorSpan;
 import android.text.style.URLSpan;
 import android.util.TypedValue;
+import android.view.KeyEvent;
 import android.view.View;
 import android.widget.TextView;
 
@@ -39,8 +41,6 @@ import org.briarproject.briar.R;
 import org.briarproject.briar.android.view.ArticleMovementMethod;
 import org.briarproject.briar.android.widget.LinkDialogFragment;
 
-import javax.annotation.Nullable;
-
 import static android.content.Context.KEYGUARD_SERVICE;
 import static android.content.Context.POWER_SERVICE;
 import static android.content.Intent.CATEGORY_DEFAULT;
@@ -60,6 +60,10 @@ import static android.text.format.DateUtils.FORMAT_ABBREV_TIME;
 import static android.text.format.DateUtils.FORMAT_SHOW_DATE;
 import static android.text.format.DateUtils.MINUTE_IN_MILLIS;
 import static android.text.format.DateUtils.WEEK_IN_MILLIS;
+import static android.view.KeyEvent.ACTION_DOWN;
+import static android.view.KeyEvent.ACTION_UP;
+import static android.view.KeyEvent.KEYCODE_ENTER;
+import static android.view.inputmethod.EditorInfo.IME_NULL;
 import static org.briarproject.briar.BuildConfig.APPLICATION_ID;
 import static org.briarproject.briar.android.TestingConstants.EXPIRY_DATE;
 
@@ -288,4 +292,12 @@ public class UiUtils {
 						.handleException(new UserFeedback(), false));
 	}
 
+	public static boolean enterPressed(int actionId,
+			@Nullable KeyEvent keyEvent) {
+		return actionId == IME_NULL &&
+				keyEvent != null &&
+				keyEvent.getAction() == ACTION_DOWN &&
+				keyEvent.getKeyCode() == KEYCODE_ENTER;
+	}
+
 }

briar-android/src/main/res/layout/fragment_setup_password.xml

@@ -71,6 +71,7 @@
 				android:layout_width="match_parent"
 				android:layout_height="wrap_content"
 				android:hint="@string/confirm_password"
+				android:imeOptions="actionNext"
 				android:inputType="textPassword"
 				android:maxLines="1"/>
 		</android.support.design.widget.TextInputLayout>