diff --git a/app/src/main/java/org/schabi/newpipe/fragments/MainFragment.java b/app/src/main/java/org/schabi/newpipe/fragments/MainFragment.java index 720e0f216..88a4c9c63 100644 --- a/app/src/main/java/org/schabi/newpipe/fragments/MainFragment.java +++ b/app/src/main/java/org/schabi/newpipe/fragments/MainFragment.java @@ -30,6 +30,7 @@ import org.schabi.newpipe.settings.tabs.Tab; import org.schabi.newpipe.settings.tabs.TabsManager; import org.schabi.newpipe.util.NavigationHelper; import org.schabi.newpipe.util.ServiceHelper; +import org.schabi.newpipe.views.ScrollableTabLayout; import java.util.ArrayList; import java.util.List; @@ -37,7 +38,7 @@ import java.util.List; public class MainFragment extends BaseFragment implements TabLayout.OnTabSelectedListener { private ViewPager viewPager; private SelectedTabsPagerAdapter pagerAdapter; - private TabLayout tabLayout; + private ScrollableTabLayout tabLayout; private List tabsList = new ArrayList<>(); private TabsManager tabsManager; diff --git a/app/src/main/java/org/schabi/newpipe/views/ScrollableTabLayout.java b/app/src/main/java/org/schabi/newpipe/views/ScrollableTabLayout.java new file mode 100644 index 000000000..48327220a --- /dev/null +++ b/app/src/main/java/org/schabi/newpipe/views/ScrollableTabLayout.java @@ -0,0 +1,128 @@ +package org.schabi.newpipe.views; + +import android.content.Context; +import android.os.Build; +import android.util.AttributeSet; +import android.util.Log; +import android.view.View; + +import androidx.annotation.NonNull; + +import com.google.android.material.tabs.TabLayout; +import com.google.android.material.tabs.TabLayout.Tab; + +/** + * A TabLayout that is scrollable when tabs exceed its width. + * Hides when there are less than 2 tabs. + */ +public class ScrollableTabLayout extends TabLayout { + private static final String TAG = ScrollableTabLayout.class.getSimpleName(); + + private int layoutWidth = 0; + private int prevVisibility = View.GONE; + + public ScrollableTabLayout(Context context) { + super(context); + } + + public ScrollableTabLayout(Context context, AttributeSet attrs) { + super(context, attrs); + } + + public ScrollableTabLayout(Context context, AttributeSet attrs, int defStyleAttr) { + super(context, attrs, defStyleAttr); + } + + @Override + protected void onLayout(boolean changed, int l, int t, int r, int b) { + super.onLayout(changed, l, t, r, b); + + remeasureTabs(); + } + + @Override + protected void onSizeChanged(int w, int h, int oldw, int oldh) { + super.onSizeChanged(w, h, oldw, oldh); + + layoutWidth = w; + } + + @Override + public void addTab(@NonNull Tab tab, int position, boolean setSelected) { + super.addTab(tab, position, setSelected); + + hasMultipleTabs(); + + // Adding a tab won't decrease total tabs' width so tabMode won't have to change to FIXED + if (getTabMode() != MODE_SCROLLABLE) { + remeasureTabs(); + } + } + + @Override + public void removeTabAt(int position) { + super.removeTabAt(position); + + hasMultipleTabs(); + + // Removing a tab won't increase total tabs' width so tabMode won't have to change to SCROLLABLE + if (getTabMode() != MODE_FIXED) { + remeasureTabs(); + } + } + + @Override + protected void onVisibilityChanged(View changedView, int visibility) { + super.onVisibilityChanged(changedView, visibility); + + // Recheck content width in case some tabs have been added or removed while ScrollableTabLayout was invisible + // We don't have to check if it was GONE because then requestLayout() will be called + if (changedView == this) { + if (prevVisibility == View.INVISIBLE) { + remeasureTabs(); + } + prevVisibility = visibility; + } + } + + private void setMode(int mode) { + if (mode == getTabMode()) return; + + setTabMode(mode); + } + + /** + * Make ScrollableTabLayout not visible if there are less than two tabs + */ + private void hasMultipleTabs() { + if (getTabCount() > 1) { + setVisibility(View.VISIBLE); + } else { + setVisibility(View.GONE); + } + } + + /** + * Calculate minimal width required by tabs and set tabMode accordingly + */ + private void remeasureTabs() { + if (prevVisibility != View.VISIBLE) return; + if (layoutWidth == 0) return; + + final int count = getTabCount(); + int contentWidth = 0; + for (int i = 0; i < count; i++) { + View child = getTabAt(i).view; + if (child.getVisibility() == View.VISIBLE) { + // Use tab's minimum requested width should actual content be too small + contentWidth += Math.max(child.getMinimumWidth(), child.getMeasuredWidth()); + } + } + + if (contentWidth > layoutWidth) { + setMode(TabLayout.MODE_SCROLLABLE); + } else { + setMode(TabLayout.MODE_FIXED); + } + } +} diff --git a/app/src/main/res/layout/fragment_main.xml b/app/src/main/res/layout/fragment_main.xml index 85614342d..1a2455691 100644 --- a/app/src/main/res/layout/fragment_main.xml +++ b/app/src/main/res/layout/fragment_main.xml @@ -6,12 +6,13 @@ android:layout_height="match_parent"> -