Added button to go to Android sync settings

app/src/main/java/eu/faircode/email/FragmentAccount.java

@@ -26,6 +26,7 @@ import android.graphics.Color;
 import android.net.Uri;
 import android.os.Build;
 import android.os.Bundle;
+import android.provider.Settings;
 import android.text.Editable;
 import android.text.TextUtils;
 import android.text.TextWatcher;
@@ -43,6 +44,7 @@ import android.widget.Button;
 import android.widget.CheckBox;
 import android.widget.CompoundButton;
 import android.widget.EditText;
+import android.widget.ImageButton;
 import android.widget.RadioGroup;
 import android.widget.ScrollView;
 import android.widget.Spinner;
@@ -71,6 +73,7 @@ import javax.mail.Folder;
 import static android.app.Activity.RESULT_OK;
 import static com.google.android.material.textfield.TextInputLayout.END_ICON_NONE;
 import static com.google.android.material.textfield.TextInputLayout.END_ICON_PASSWORD_TOGGLE;
+import static eu.faircode.email.ServiceAuthenticator.AUTH_TYPE_GMAIL;
 import static eu.faircode.email.ServiceAuthenticator.AUTH_TYPE_OAUTH;
 import static eu.faircode.email.ServiceAuthenticator.AUTH_TYPE_PASSWORD;
 
@@ -89,6 +92,7 @@ public class FragmentAccount extends FragmentBase {
     private RadioGroup rgEncryption;
     private CheckBox cbInsecure;
     private EditText etPort;
+    private ImageButton ibAccount;
     private EditText etUser;
     private TextInputLayout tilPassword;
     private TextView tvCharacters;
@@ -193,6 +197,7 @@ public class FragmentAccount extends FragmentBase {
         etPort = view.findViewById(R.id.etPort);
         rgEncryption = view.findViewById(R.id.rgEncryption);
         cbInsecure = view.findViewById(R.id.cbInsecure);
+        ibAccount = view.findViewById(R.id.ibAccount);
         etUser = view.findViewById(R.id.etUser);
         tilPassword = view.findViewById(R.id.tilPassword);
         tvCharacters = view.findViewById(R.id.tvCharacters);
@@ -316,6 +321,16 @@ public class FragmentAccount extends FragmentBase {
             }
         });
 
+        ibAccount.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                Intent sync = new Intent(Settings.ACTION_SYNC_SETTINGS)
+                        .setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+                if (sync.resolveActivity(v.getContext().getPackageManager()) != null)
+                    v.getContext().startActivity(sync);
+            }
+        });
+
         tilPassword.getEditText().addTextChangedListener(new TextWatcher() {
             @Override
             public void beforeTextChanged(CharSequence s, int start, int count, int after) {
@@ -1494,6 +1509,7 @@ public class FragmentAccount extends FragmentBase {
                     tilPassword.setEnabled(false);
                     btnCertificate.setEnabled(false);
                 }
+                ibAccount.setEnabled(auth == AUTH_TYPE_GMAIL);
 
                 cbOnDemand.setEnabled(cbSynchronize.isChecked());
                 cbPrimary.setEnabled(cbSynchronize.isChecked());

app/src/main/res/layout/fragment_account.xml

@@ -224,14 +224,26 @@
 
         <eu.faircode.email.FixedTextView
             android:id="@+id/tvUser"
-            android:layout_width="wrap_content"
+            android:layout_width="0dp"
             android:layout_height="wrap_content"
             android:layout_marginTop="12dp"
             android:labelFor="@+id/etUser"
             android:text="@string/title_user"
             android:textAppearance="@style/TextAppearance.AppCompat.Small"
-            app:layout_constraintStart_toStartOf="parent"
-            app:layout_constraintTop_toBottomOf="@id/etPort" />
+            app:layout_constraintBottom_toBottomOf="@id/ibAccount"
+            app:layout_constraintEnd_toStartOf="@+id/ibAccount"
+            app:layout_constraintStart_toStartOf="parent" />
+
+        <ImageButton
+            android:id="@+id/ibAccount"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="12dp"
+            android:paddingEnd="12dp"
+            android:background="?android:attr/selectableItemBackgroundBorderless"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintTop_toBottomOf="@id/etPort"
+            app:srcCompat="@drawable/twotone_account_box_24" />
 
         <eu.faircode.email.EditTextPlain
             android:id="@+id/etUser"
@@ -241,7 +253,7 @@
             android:inputType="text"
             android:textAppearance="@style/TextAppearance.AppCompat.Medium"
             app:layout_constraintStart_toStartOf="parent"
-            app:layout_constraintTop_toBottomOf="@id/tvUser" />
+            app:layout_constraintTop_toBottomOf="@id/ibAccount" />
 
         <!-- password -->
 
@@ -978,7 +990,7 @@
             android:layout_width="0dp"
             android:layout_height="0dp"
             app:constraint_referenced_ids="
-                tvUser,etUser,tvPassword,tilPassword,tvCaseSensitive,btnCertificate,tvCertificate,tvRealm,etRealm,
+                tvUser,ibAccount,etUser,tvPassword,tilPassword,tvCaseSensitive,btnCertificate,tvCertificate,tvRealm,etRealm,
                 tvName,tvNameRemark,etName,
                 tvColor,btnColor,tvColorHint,tvColorPro" />