reduce pager sensitivity

thanks to tuskyapp/Tusky#3148
sk22 · Jan 11, 2023 · fe5803a · fe5803a
1 parent 7e82998
commit fe5803a
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Hide file tree

Showing 5 changed files with 23 additions and 0 deletions.
diff --git a/mastodon/src/main/java/org/joinmastodon/android/fragments/HomeTabFragment.java b/mastodon/src/main/java/org/joinmastodon/android/fragments/HomeTabFragment.java
@@ -109,6 +109,7 @@ public void onViewCreated(View view, Bundle savedInstanceState){
         super.onViewCreated(view, savedInstanceState);
 
         pager = new ViewPager2(getContext());
+        UiUtils.reduceSwipeSensitivity(pager);
         pager.setLayoutParams(new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, 0, 1));
         pager.setUserInputEnabled(!GlobalUserPreferences.disableSwipe);
         pager.setAdapter(new HomePagerAdapter());

diff --git a/mastodon/src/main/java/org/joinmastodon/android/fragments/NotificationsFragment.java b/mastodon/src/main/java/org/joinmastodon/android/fragments/NotificationsFragment.java
@@ -102,6 +102,7 @@ public View onCreateContentView(LayoutInflater inflater, ViewGroup container, Bu
 
 		tabLayout=view.findViewById(R.id.tabbar);
 		pager=view.findViewById(R.id.pager);
+		UiUtils.reduceSwipeSensitivity(pager);
 
 		tabViews=new FrameLayout[3];
 		for(int i=0;i<tabViews.length;i++){

diff --git a/mastodon/src/main/java/org/joinmastodon/android/fragments/ProfileFragment.java b/mastodon/src/main/java/org/joinmastodon/android/fragments/ProfileFragment.java
@@ -241,6 +241,7 @@ protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec){
 			tabViews[i]=tabView;
 		}
 
+		UiUtils.reduceSwipeSensitivity(pager);
 		pager.setOffscreenPageLimit(5);
 		pager.setUserInputEnabled(!GlobalUserPreferences.disableSwipe);
 		pager.setAdapter(new ProfilePagerAdapter());

diff --git a/mastodon/src/main/java/org/joinmastodon/android/fragments/discover/DiscoverFragment.java b/mastodon/src/main/java/org/joinmastodon/android/fragments/discover/DiscoverFragment.java
@@ -99,6 +99,7 @@ public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container,
 		tabLayout.setTabTextSize(V.dp(16));
 		tabLayout.setTabTextColors(UiUtils.getThemeColor(getActivity(), R.attr.colorTabInactive), UiUtils.getThemeColor(getActivity(), android.R.attr.textColorPrimary));
 
+		UiUtils.reduceSwipeSensitivity(pager);
 		pager.setOffscreenPageLimit(4);
 		pager.setUserInputEnabled(!GlobalUserPreferences.disableSwipe);
 		pager.setAdapter(new DiscoverPagerAdapter());

diff --git a/mastodon/src/main/java/org/joinmastodon/android/ui/utils/UiUtils.java b/mastodon/src/main/java/org/joinmastodon/android/ui/utils/UiUtils.java
@@ -31,6 +31,7 @@
 import android.text.SpannableStringBuilder;
 import android.text.Spanned;
 import android.text.TextUtils;
+import android.util.Log;
 import android.view.HapticFeedbackConstants;
 import android.view.Menu;
 import android.view.MenuItem;
@@ -87,6 +88,7 @@
 import org.parceler.Parcels;
 
 import java.io.File;
+import java.lang.reflect.Field;
 import java.lang.reflect.Method;
 import java.net.URI;
 import java.net.URISyntaxException;
@@ -111,6 +113,8 @@
 import androidx.browser.customtabs.CustomTabsIntent;
 import androidx.recyclerview.widget.DiffUtil;
 import androidx.recyclerview.widget.RecyclerView;
+import androidx.viewpager2.widget.ViewPager2;
+
 import me.grishka.appkit.Nav;
 import me.grishka.appkit.api.Callback;
 import me.grishka.appkit.api.ErrorResponse;
@@ -1014,4 +1018,19 @@ public static boolean pickAccountForCompose(Activity activity, String accountID,
 			return false;
 		}
 	}
+
+	// https://github.com/tuskyapp/Tusky/pull/3148
+	public static void reduceSwipeSensitivity(ViewPager2 pager) {
+		try {
+			Field recyclerViewField = ViewPager2.class.getDeclaredField("mRecyclerView");
+			recyclerViewField.setAccessible(true);
+			RecyclerView recyclerView = (RecyclerView) recyclerViewField.get(pager);
+			Field touchSlopField = RecyclerView.class.getDeclaredField("mTouchSlop");
+			touchSlopField.setAccessible(true);
+			int touchSlop = touchSlopField.getInt(recyclerView);
+			touchSlopField.set(recyclerView, touchSlop * 3);
+		} catch (Exception ex) {
+			Log.e("reduceSwipeSensitivity", Log.getStackTraceString(ex));
+		}
+	}
 }