回答編集履歴
1
追記
answer
CHANGED
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@@ -65,4 +65,48 @@
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65
65
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}
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66
66
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}
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67
67
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}
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68
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+
```
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69
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+
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70
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+
最後まで行ったら最初に戻るようにするには、次のように変更すると良いでしょう。
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71
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+
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72
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+
```diff
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73
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+
public class CustomAdapter extends RecyclerView.Adapter<CustomAdapter.CustomViewHolder> {
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74
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+
private RecyclerView recyclerView;
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75
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+ private LinearLayoutManager layoutManager;
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76
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+
private List<Item> items;
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77
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+
+ private int focusPosition = -1;
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78
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+
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79
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+
- public CustomAdapter(RecyclerView recyclerView, List<Item> items) {
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80
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+
+ public CustomAdapter(RecyclerView recyclerView, LinearLayoutManager layoutManager, List<Item> items) {
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81
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+
this.recyclerView = recyclerView;
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82
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+
+ this.layoutManager = layoutManager;
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83
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+
this.items = items;
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84
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+
+
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85
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+
+ recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
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86
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+
+ @Override
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87
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+
+ public void onScrollStateChanged(@NonNull RecyclerView recyclerView, int newState) {
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88
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+
+ if (newState == RecyclerView.SCROLL_STATE_IDLE && focusPosition >= 0) {
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89
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+ setFocus(focusPosition);
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90
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+
+ focusPosition = -1;
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91
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+
+ }
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92
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+
+ }
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93
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+
+ });
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94
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+
}
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95
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+
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96
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+
// 略
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97
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+
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98
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+
public void focusNext() {
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99
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+
int position = getAdapterPosition() + 1;
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100
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+
- if (position < items.size()) {
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101
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+
+ if (position == items.size()) {
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102
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+
+ position = 0;
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103
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+
+ }
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104
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+
+ if (position >= layoutManager.findFirstCompletelyVisibleItemPosition() &&
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105
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+
+ position <= layoutManager.findLastCompletelyVisibleItemPosition()) {
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106
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+
setFocus(position);
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107
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+
+ } else {
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108
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+
+ focusPosition = position;
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109
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+
+ recyclerView.smoothScrollToPosition(position);
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110
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+
}
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111
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+
}
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68
112
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```
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