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Code Issues Projects Releases Packages Wiki Activity Actions

Add dots indicator to horizontalGridView in HomeFragment

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This commit is contained in:
CappielloAntonio 2021-08-27 18:06:58 +02:00
parent 8060d1db64
commit 8789b44e26
4 changed files with 144 additions and 1 deletions
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2
.idea/misc.xml generated
View file

@ -43,7 +43,7 @@
<entry key="app/src/main/res/layout/fragment_album_catalogue.xml" value="0.3229166666666667" />
<entry key="app/src/main/res/layout/fragment_album_page.xml" value="0.2769409038238702" />
<entry key="app/src/main/res/layout/fragment_artist_page.xml" value="0.1" />
<entry key="app/src/main/res/layout/fragment_home.xml" value="0.1" />
<entry key="app/src/main/res/layout/fragment_home.xml" value="0.3229166666666667" />
<entry key="app/src/main/res/layout/fragment_login.xml" value="0.3166496424923391" />
<entry key="app/src/main/res/layout/fragment_player_bottom_sheet.xml" value="0.3166496424923391" />
<entry key="app/src/main/res/layout/fragment_playlist_catalogue.xml" value="0.3229166666666667" />

112
app/src/main/java/com/cappielloantonio/play/helper/recyclerview/DotsIndicatorDecoration.java Normal file
View file

@ -0,0 +1,112 @@
package com.cappielloantonio.play.helper.recyclerview;
import android.content.res.Resources;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Rect;
import android.view.View;
import androidx.annotation.ColorInt;
import androidx.recyclerview.widget.GridLayoutManager;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import org.jetbrains.annotations.NotNull;
public class DotsIndicatorDecoration extends RecyclerView.ItemDecoration {
private static final String TAG = "DotsIndicatorDecoration";
private final int indicatorHeight;
private final int indicatorItemPadding;
private final int radius;
private final Paint inactivePaint = new Paint();
private final Paint activePaint = new Paint();
public DotsIndicatorDecoration(int radius, int padding, int indicatorHeight, @ColorInt int colorInactive, @ColorInt int colorActive) {
float strokeWidth = Resources.getSystem().getDisplayMetrics().density * 1;
this.radius = radius;
inactivePaint.setStrokeCap(Paint.Cap.ROUND);
inactivePaint.setStrokeWidth(strokeWidth);
inactivePaint.setStyle(Paint.Style.STROKE);
inactivePaint.setAntiAlias(true);
inactivePaint.setColor(colorInactive);
activePaint.setStrokeCap(Paint.Cap.ROUND);
activePaint.setStrokeWidth(strokeWidth);
activePaint.setStyle(Paint.Style.FILL);
activePaint.setAntiAlias(true);
activePaint.setColor(colorActive);
this.indicatorItemPadding = padding;
this.indicatorHeight = indicatorHeight;
}
@Override
public void onDrawOver(@NotNull Canvas c, @NotNull RecyclerView parent, @NotNull RecyclerView.State state) {
super.onDrawOver(c, parent, state);
if (parent.getAdapter() == null) return;
int itemCount = (int) Math.ceil((double) parent.getAdapter().getItemCount() / 5);
// center horizontally, calculate width and subtract half from center
float totalLength = this.radius * 2 * itemCount;
float paddingBetweenItems = Math.max(0, itemCount - 1) * indicatorItemPadding;
float indicatorTotalWidth = totalLength + paddingBetweenItems;
float indicatorStartX = (parent.getWidth() - indicatorTotalWidth) / 2f;
// center vertically in the allotted space
float indicatorPosY = parent.getHeight() - indicatorHeight - (float) indicatorItemPadding / 3;
drawInactiveDots(c, indicatorStartX, indicatorPosY, itemCount);
final int activePosition;
if (parent.getLayoutManager() instanceof GridLayoutManager) {
activePosition = ((GridLayoutManager) parent.getLayoutManager()).findFirstVisibleItemPosition();
} else if (parent.getLayoutManager() instanceof LinearLayoutManager) {
activePosition = ((LinearLayoutManager) parent.getLayoutManager()).findFirstVisibleItemPosition();
} else {
// not supported layout manager
return;
}
if (activePosition == RecyclerView.NO_POSITION) {
return;
}
// find offset of active page if the user is scrolling
final View activeChild = parent.getLayoutManager().findViewByPosition(activePosition);
if (activeChild == null) {
return;
}
drawActiveDot(c, indicatorStartX, indicatorPosY, activePosition);
}
private void drawInactiveDots(Canvas c, float indicatorStartX, float indicatorPosY, int itemCount) {
// width of item indicator including padding
final float itemWidth = this.radius * 2 + indicatorItemPadding;
float start = indicatorStartX + radius;
for (int i = 0; i < itemCount; i++) {
c.drawCircle(start, indicatorPosY, radius, inactivePaint);
start += itemWidth;
}
}
private void drawActiveDot(Canvas c, float indicatorStartX, float indicatorPosY, int highlightPosition) {
// width of item indicator including padding
final float itemWidth = this.radius * 2 + indicatorItemPadding;
float highlightStart = (float) Math.ceil(indicatorStartX + radius + itemWidth * highlightPosition / 5);
c.drawCircle(highlightStart, indicatorPosY, radius, activePaint);
}
@Override
public void getItemOffsets(@NotNull Rect outRect, @NotNull View view, @NotNull RecyclerView parent, @NotNull RecyclerView.State state) {
super.getItemOffsets(outRect, view, parent, state);
outRect.bottom = indicatorHeight;
}
}

29
app/src/main/java/com/cappielloantonio/play/ui/fragment/HomeFragment.java
View file

@ -11,6 +11,7 @@ import android.view.ViewGroup;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.core.content.ContextCompat;
import androidx.core.view.ViewCompat;
import androidx.fragment.app.Fragment;
import androidx.lifecycle.ViewModelProvider;
@ -31,6 +32,7 @@ import com.cappielloantonio.play.adapter.SongHorizontalAdapter;
import com.cappielloantonio.play.adapter.YearAdapter;
import com.cappielloantonio.play.databinding.FragmentHomeBinding;
import com.cappielloantonio.play.helper.recyclerview.CustomLinearSnapHelper;
import com.cappielloantonio.play.helper.recyclerview.DotsIndicatorDecoration;
import com.cappielloantonio.play.model.Album;
import com.cappielloantonio.play.model.Artist;
import com.cappielloantonio.play.model.Song;
@ -358,6 +360,15 @@ public class HomeFragment extends Fragment {
SnapHelper starredTrackSnapHelper = new PagerSnapHelper();
starredTrackSnapHelper.attachToRecyclerView(bind.starredTracksRecyclerView);
bind.starredTracksRecyclerView.addItemDecoration(
new DotsIndicatorDecoration(
getResources().getDimensionPixelSize(R.dimen.radius),
getResources().getDimensionPixelSize(R.dimen.radius) * 4,
getResources().getDimensionPixelSize(R.dimen.dots_height),
requireContext().getResources().getColor(R.color.titleTextColor, null),
requireContext().getResources().getColor(R.color.titleTextColor, null))
);
}
private void initStarredAlbumsView() {
@ -380,6 +391,15 @@ public class HomeFragment extends Fragment {
SnapHelper starredAlbumSnapHelper = new PagerSnapHelper();
starredAlbumSnapHelper.attachToRecyclerView(bind.starredAlbumsRecyclerView);
bind.starredAlbumsRecyclerView.addItemDecoration(
new DotsIndicatorDecoration(
getResources().getDimensionPixelSize(R.dimen.radius),
getResources().getDimensionPixelSize(R.dimen.radius) * 4,
getResources().getDimensionPixelSize(R.dimen.dots_height),
requireContext().getResources().getColor(R.color.titleTextColor, null),
requireContext().getResources().getColor(R.color.titleTextColor, null))
);
}
private void initStarredArtistsView() {
@ -402,6 +422,15 @@ public class HomeFragment extends Fragment {
SnapHelper starredArtistSnapHelper = new PagerSnapHelper();
starredArtistSnapHelper.attachToRecyclerView(bind.starredArtistsRecyclerView);
bind.starredArtistsRecyclerView.addItemDecoration(
new DotsIndicatorDecoration(
getResources().getDimensionPixelSize(R.dimen.radius),
getResources().getDimensionPixelSize(R.dimen.radius) * 4,
getResources().getDimensionPixelSize(R.dimen.dots_height),
requireContext().getResources().getColor(R.color.titleTextColor, null),
requireContext().getResources().getColor(R.color.titleTextColor, null))
);
}
private void initRecentAddedAlbumView() {

2
app/src/main/res/values/dimens.xml
View file

@ -11,4 +11,6 @@
<dimen name="notification_big_image_size">128dp</dimen>
<dimen name="radius">2dp</dimen>
<dimen name="dots_height">2dp</dimen>
</resources>