You can now follow and unfollow accounts. Revolutionary.

mastodon/src/main/java/org/joinmastodon/android/api/requests/accounts/SetAccountFollowed.java

@@ -0,0 +1,11 @@
+package org.joinmastodon.android.api.requests.accounts;
+
+import org.joinmastodon.android.api.MastodonAPIRequest;
+import org.joinmastodon.android.model.Relationship;
+
+public class SetAccountFollowed extends MastodonAPIRequest<Relationship>{
+	public SetAccountFollowed(String id, boolean followed){
+		super(HttpMethod.POST, "/accounts/"+id+"/"+(followed ? "follow" : "unfollow"), Relationship.class);
+		setRequestBody(new Object());
+	}
+}

mastodon/src/main/java/org/joinmastodon/android/fragments/ProfileFragment.java

@@ -27,6 +27,7 @@ import android.widget.Button;
 import android.widget.EditText;
 import android.widget.FrameLayout;
 import android.widget.ImageView;
+import android.widget.ProgressBar;
 import android.widget.RelativeLayout;
 import android.widget.TextView;
 import android.widget.Toolbar;
@@ -35,6 +36,7 @@ import org.joinmastodon.android.R;
 import org.joinmastodon.android.api.requests.accounts.GetAccountRelationships;
 import org.joinmastodon.android.api.requests.accounts.GetAccountStatuses;
 import org.joinmastodon.android.api.requests.accounts.GetOwnAccount;
+import org.joinmastodon.android.api.requests.accounts.SetAccountFollowed;
 import org.joinmastodon.android.api.requests.accounts.UpdateAccountCredentials;
 import org.joinmastodon.android.api.session.AccountSessionManager;
 import org.joinmastodon.android.model.Account;
@@ -48,6 +50,7 @@ import org.joinmastodon.android.ui.text.HtmlParser;
 import org.joinmastodon.android.ui.utils.UiUtils;
 import org.joinmastodon.android.ui.views.CoverImageView;
 import org.joinmastodon.android.ui.views.NestedRecyclerScrollView;
+import org.joinmastodon.android.ui.views.ProgressBarButton;
 import org.parceler.Parcels;
 
 import java.time.LocalDateTime;
@@ -80,7 +83,7 @@ public class ProfileFragment extends LoaderFragment implements OnBackPressedList
 	private CoverImageView cover;
 	private View avatarBorder;
 	private TextView name, username, bio, followersCount, followersLabel, followingCount, followingLabel, postsCount, postsLabel;
-	private Button actionButton;
+	private ProgressBarButton actionButton;
 	private ViewPager2 pager;
 	private NestedRecyclerScrollView scrollView;
 	private AccountTimelineFragment postsFragment, postsWithRepliesFragment, mediaFragment;
@@ -91,6 +94,7 @@ public class ProfileFragment extends LoaderFragment implements OnBackPressedList
 	private float titleTransY;
 	private View postsBtn, followersBtn, followingBtn;
 	private EditText nameEdit, bioEdit;
+	private ProgressBar actionProgress;
 
 	private Account account;
 	private String accountID;
@@ -141,6 +145,7 @@ public class ProfileFragment extends LoaderFragment implements OnBackPressedList
 		refreshLayout=content.findViewById(R.id.refresh_layout);
 		nameEdit=content.findViewById(R.id.name_edit);
 		bioEdit=content.findViewById(R.id.bio_edit);
+		actionProgress=content.findViewById(R.id.action_progress);
 
 		avatar.setOutlineProvider(new ViewOutlineProvider(){
 			@Override
@@ -389,9 +394,7 @@ public class ProfileFragment extends LoaderFragment implements OnBackPressedList
 					@Override
 					public void onSuccess(List<Relationship> result){
 						relationship=result.get(0);
-						invalidateOptionsMenu();
-						actionButton.setVisibility(View.VISIBLE);
-						actionButton.setText(relationship.following ? R.string.button_following : R.string.button_follow);
+						updateRelationship();
 					}
 
 					@Override
@@ -402,6 +405,12 @@ public class ProfileFragment extends LoaderFragment implements OnBackPressedList
 				.exec(accountID);
 	}
 
+	private void updateRelationship(){
+		invalidateOptionsMenu();
+		actionButton.setVisibility(View.VISIBLE);
+		actionButton.setText(relationship.following ? R.string.button_following : R.string.button_follow);
+	}
+
 	private void onScrollChanged(View v, int scrollX, int scrollY, int oldScrollX, int oldScrollY){
 		int topBarsH=getToolbar().getHeight()+statusBarHeight;
 		if(scrollY>avatar.getTop()-topBarsH){
@@ -453,23 +462,33 @@ public class ProfileFragment extends LoaderFragment implements OnBackPressedList
 				loadAccountInfoAndEnterEditMode();
 			else
 				saveAndExitEditMode();
+		}else{
+			toggleFollowing();
 		}
 	}
 
+	private void setActionProgressVisible(boolean visible){
+		actionButton.setTextVisible(!visible);
+		actionProgress.setVisibility(visible ? View.VISIBLE : View.GONE);
+		actionButton.setClickable(!visible);
+	}
+
 	private void loadAccountInfoAndEnterEditMode(){
+		setActionProgressVisible(true);
 		new GetOwnAccount()
 				.setCallback(new Callback<>(){
 					@Override
 					public void onSuccess(Account result){
 						enterEditMode(result);
+						setActionProgressVisible(false);
 					}
 
 					@Override
 					public void onError(ErrorResponse error){
 						error.showToast(getActivity());
+						setActionProgressVisible(false);
 					}
 				})
-				.wrapProgress(getActivity(), R.string.loading, true)
 				.exec(accountID);
 	}
 
@@ -561,6 +580,7 @@ public class ProfileFragment extends LoaderFragment implements OnBackPressedList
 	private void saveAndExitEditMode(){
 		if(!isInEditMode)
 			throw new IllegalStateException();
+		setActionProgressVisible(true);
 		new UpdateAccountCredentials(nameEdit.getText().toString(), bioEdit.getText().toString(), editNewAvatar, editNewCover, aboutFragment.getFields())
 				.setCallback(new Callback<>(){
 					@Override
@@ -568,14 +588,35 @@ public class ProfileFragment extends LoaderFragment implements OnBackPressedList
 						account=result;
 						AccountSessionManager.getInstance().updateAccountInfo(accountID, account);
 						exitEditMode();
+						setActionProgressVisible(false);
 					}
 
 					@Override
 					public void onError(ErrorResponse error){
 						error.showToast(getActivity());
+						setActionProgressVisible(false);
+					}
+				})
+				.exec(accountID);
+	}
+
+	private void toggleFollowing(){
+		setActionProgressVisible(true);
+		new SetAccountFollowed(account.id, !relationship.following)
+				.setCallback(new Callback<>(){
+					@Override
+					public void onSuccess(Relationship result){
+						relationship=result;
+						updateRelationship();
+						setActionProgressVisible(false);
+					}
+
+					@Override
+					public void onError(ErrorResponse error){
+						error.showToast(getActivity());
+						setActionProgressVisible(false);
 					}
 				})
-				.wrapProgress(getActivity(), R.string.saving, false)
 				.exec(accountID);
 	}
 

mastodon/src/main/java/org/joinmastodon/android/ui/views/ProgressBarButton.java

@@ -0,0 +1,38 @@
+package org.joinmastodon.android.ui.views;
+
+import android.content.Context;
+import android.graphics.Canvas;
+import android.util.AttributeSet;
+import android.widget.Button;
+
+public class ProgressBarButton extends Button{
+	private boolean textVisible=true;
+
+	public ProgressBarButton(Context context){
+		super(context);
+	}
+
+	public ProgressBarButton(Context context, AttributeSet attrs){
+		super(context, attrs);
+	}
+
+	public ProgressBarButton(Context context, AttributeSet attrs, int defStyleAttr){
+		super(context, attrs, defStyleAttr);
+	}
+
+	public void setTextVisible(boolean textVisible){
+		this.textVisible=textVisible;
+		invalidate();
+	}
+
+	public boolean isTextVisible(){
+		return textVisible;
+	}
+
+	@Override
+	protected void onDraw(Canvas canvas){
+		if(textVisible){
+			super.onDraw(canvas);
+		}
+	}
+}

mastodon/src/main/res/layout/fragment_profile.xml

@@ -125,14 +125,31 @@
 						tools:text="following" />
 				</LinearLayout>
 
-				<Button
-					android:id="@+id/profile_action_btn"
+				<FrameLayout
+					android:id="@+id/profile_action_btn_wrap"
 					android:layout_width="wrap_content"
 					android:layout_height="wrap_content"
 					android:layout_alignParentEnd="true"
 					android:layout_below="@id/following_btn"
-					android:layout_margin="16dp"
-					tools:text="Edit Profile"/>
+					android:padding="16dp"
+					android:clipToPadding="false">
+					<org.joinmastodon.android.ui.views.ProgressBarButton
+						android:id="@+id/profile_action_btn"
+						android:layout_width="wrap_content"
+						android:layout_height="wrap_content"
+						tools:text="Edit Profile"/>
+					<ProgressBar
+						android:id="@+id/action_progress"
+						android:layout_width="wrap_content"
+						android:layout_height="wrap_content"
+						android:layout_gravity="center"
+						android:indeterminate="true"
+						style="?android:progressBarStyleSmall"
+						android:elevation="10dp"
+						android:outlineProvider="none"
+						android:indeterminateTint="@color/text_button"
+						android:visibility="gone"/>
+				</FrameLayout>
 
 				<TextView
 					android:id="@+id/name"
@@ -142,7 +159,7 @@
 					android:layout_alignParentStart="true"
 					android:layout_marginStart="16dp"
 					android:layout_marginTop="16dp"
-					android:layout_toStartOf="@id/profile_action_btn"
+					android:layout_toStartOf="@id/profile_action_btn_wrap"
 					android:textAppearance="@style/m3_headline_small"
 					tools:text="Eugen" />
 
@@ -152,7 +169,7 @@
 					android:layout_height="wrap_content"
 					android:layout_below="@id/name"
 					android:layout_marginStart="16dp"
-					android:layout_toStartOf="@id/profile_action_btn"
+					android:layout_toStartOf="@id/profile_action_btn_wrap"
 					android:textAppearance="@style/m3_title_medium"
 					android:textColor="@color/light_ui_action_button"
 					tools:text="\@Gargron"/>
@@ -176,7 +193,7 @@
 					android:layout_alignParentStart="true"
 					android:layout_marginStart="16dp"
 					android:layout_marginTop="16dp"
-					android:layout_toStartOf="@id/profile_action_btn"
+					android:layout_toStartOf="@id/profile_action_btn_wrap"
 					android:textAppearance="@style/m3_body_large"
 					android:background="@drawable/edit_text_border"
 					android:inputType="textPersonName|textCapWords"

mastodon/src/main/res/values/colors.xml

@@ -34,6 +34,7 @@
 	<color name="actionbar_bg">#FAFBFC</color>
 	<color name="navigation_bar_bg">#000</color>
 	<color name="highlight_over_dark">#80FFFFFF</color>
+	<color name="text_button">@color/gray_50</color>
 
 	<color name="favorite_selected">#FF9F0A</color>
 	<color name="boost_selected">#79BD9A</color>