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RecyclerViewにはチェックボックス付きの画像が表示されています。チェックボックスをオンにすると、画像に関連付けられた項目がデータベースに保存されます。また、クリックすると、画像をフィルタリングする関数を呼び出し、リサイクルビューを更新してタイトルがクリックされたアルファベット文字に対応する画像を表示するアルファベットインデックスがあります。問題は、RecyclerViewイメージが最初のクリックでのみ更新されることです。後続のクリックでRecyclerViewイメージへの更新はありません。私はチェックして、それは機能のさまざまなポイント全体にトーストメッセージを表示することができるように、関数は、その後のクリックで呼び出されるように見えます。 RecyclerViewだけがフィルタリングされた画像データで更新されていないので、なぜ更新していないのかわかりません。これについての助けに感謝します。ここOnClick Listenerは、最初のクリックでのみリサイクラビューを更新します。
は主活動である：ここ
public class AddBrandPage extends AppCompatActivity implements OnClickListener {
//declare variables
private RecyclerView recyclerView;
private RecyclerView.LayoutManager layoutManager;
private RecyclerView.Adapter adapter;
private RecyclerView alpharecyclerView;
private RecyclerView.LayoutManager alphaLayoutManager;
private RecyclerView.Adapter alphaAdapter;
private DatabaseReference myRef;
private DatabaseReference userRef;
private Button btn_skip;
private Button btn_save;
private CheckBox checkbox;
private String t;
private String letter;
List<LogoItems> brandLogo = new ArrayList<>();
//HashMap<String, String> saveBrands = new HashMap<>();
List<LogoItems> removedBrandLogo = new ArrayList<>();
List<String> selectionList = new ArrayList<>();
List<AlphaItems> alphaList = new LinkedList<>();
List<LogoItems> tmp = new ArrayList<>();
String[] alphabets = {"All", "A", "B", "C", "D", "E", "F", "G", "H", "I",
"J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z"};
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_add_brand_page);
//initialize variables
btn_skip = (Button) findViewById(R.id.btn_skip);
btn_save = (Button) findViewById(R.id.btn_save);
myRef = FirebaseDatabase.getInstance().getReference().child("/brands");
userRef = FirebaseDatabase.getInstance().getReference().child("/users");
//calls to load data to arraylists
loadAlpha();
loadLogoImgData();
//set the listener for the buttons click event
btn_skip.setOnClickListener(this);
btn_save.setOnClickListener(this);
}
private void loadAlpha() {
for (String alpha : alphabets) {
alphaList.add(new AlphaItems(alpha));
}
startAlphaRecyclerView();
}
public void loadLogoImgData() {
brandLogo.clear();
myRef.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
for (DataSnapshot brandSnapshot : dataSnapshot.getChildren()) {
LogoItems value = brandSnapshot.getValue(LogoItems.class);
brandLogo.add(value);
tmp.add(value);
}
startLogoRecyclerView();
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
}
@Override
public void onClick(View view) {
if (view == btn_skip) {
//if skip button clicked close current window and go to user main page
finish();
startActivity(new Intent(getApplicationContext(), UserMainPage.class));
}
if (view == btn_save) {
saveData();
}
}
public void startLogoRecyclerView() {
// set the main recyclerview view for the logo in the layout
recyclerView = (RecyclerView) findViewById(R.id.recylView);
recyclerView.setHasFixedSize(true);
// set the main layoutManager of the logo recyclerview
layoutManager = new GridLayoutManager(this, 2);
recyclerView.setLayoutManager(layoutManager);
// set the logo recycler view adapter
adapter = new LogoAdapter(brandLogo, getBaseContext(), AddBrandPage.this);
recyclerView.setAdapter(adapter);
}
public void startAlphaRecyclerView() {
// set the main recyclerview view for the logo in the layout
alpharecyclerView = (RecyclerView) findViewById(R.id.alpharecyclerView);
alpharecyclerView.setHasFixedSize(true);
// set the main layoutManager of the alpha recyclerview
alphaLayoutManager = new LinearLayoutManager(this, LinearLayoutManager.HORIZONTAL, false);
alpharecyclerView.setLayoutManager(alphaLayoutManager);
// set the alpha recycler view adapter
alphaAdapter = new AlphaAdapter(alphaList, getBaseContext(), AddBrandPage.this);
alpharecyclerView.setAdapter(alphaAdapter);
}
public List<String> prepareSelection(View v, int position) {
checkbox = (CheckBox) v;
//check if user selected checkbox and add or remove from list
//if (checkbox.isChecked()) {
selectionList.add(brandLogo.get(position).getName());
//} else {
// selectionList.remove(brandLogo.get(position).getLogo());
//}
return selectionList;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (!(o instanceof AddBrandPage)) return false;
AddBrandPage that = (AddBrandPage) o;
if (t != null ? !t.equals(that.t) : that.t != null) return false;
return letter != null ? letter.equals(that.letter) : that.letter == null;
}
@Override
public int hashCode() {
int result = t != null ? t.hashCode() : 0;
result = 31 * result + (letter != null ? letter.hashCode() : 0);
return result;
}
public void updateLogoDisplay(final String letter) {
int i = 0;
brandLogo.clear();
brandLogo.addAll(tmp);
if (!(letter.equals("All"))) {
//Iterator<LogoItems> iter = brandLogo.iterator();
for (i=0; i< tmp.size(); i++){ //Iterator<LogoItems> iter = tmp.iterator(); iter.hasNext();) {
//while (iter.hasNext()) {
LogoItems r = tmp.get(i);
final String c = r.getName();
if (c != null) {
String t = c.substring(0, 1);
if (t != null) {
if (c != null) {
if ((letter.equals(t))) {
//brandLogo.remove(r);
removedBrandLogo.add(r);
//iter.remove();
}
}
}
} else {
}
}
brandLogo.clear();
brandLogo.addAll(removedBrandLogo);
adapter.notifyDataSetChanged();
//startLogoRecyclerView();
}
}
public void saveData() {
final FirebaseAuth mAuth;
final DatabaseReference userRef;
mAuth = FirebaseAuth.getInstance();
userRef = FirebaseDatabase.getInstance().getReference().child("users");
DatabaseReference curUser = userRef.child(mAuth.getCurrentUser().getUid());
curUser.child("brands").setValue(selectionList);//save selected items to the database
}
}
はアルファベットアダプタ（AlphaAdapter.java）である：
：ここpublic class AlphaAdapter extends RecyclerView.Adapter<AlphaAdapter.AlphaViewHolder> {
//declare variables
List<AlphaItems> alphaList = new ArrayList<>();
private AddBrandPage addBrandPage;
private Context context;
//the constructor
public AlphaAdapter (List<AlphaItems> alphaList, Context context, AddBrandPage addBrandPage){
this.alphaList = alphaList;
this.context = context;
this.addBrandPage = addBrandPage;
}
@Override
public AlphaAdapter.AlphaViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.alpha_items, parent, false);
AlphaViewHolder alphaViewHolder = new AlphaViewHolder(view,addBrandPage);
return alphaViewHolder;
}
@Override
public void onBindViewHolder(AlphaAdapter.AlphaViewHolder holder, int position) {
holder.txt_alpha.setText(alphaList.get(position).getLetter());
}
@Override
public int getItemCount() {
return alphaList.size();
}
public class AlphaViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener{
//declare variables
private TextView txt_alpha;
private AddBrandPage addBrandPage;
//the constructor
public AlphaViewHolder (View itemView, AddBrandPage addBrandPage){
super(itemView);
this.addBrandPage = addBrandPage;
//initialize variables
txt_alpha = (TextView) itemView.findViewById(R.id.txt_alpha);
//set click listener
txt_alpha.setOnClickListener(this);
}
@Override
public void onClick(View v) {
int position = getAdapterPosition();
String letter = alphaList.get(position).getLetter();
addBrandPage.updateLogoDisplay(letter);
}
}
}
アルファベットインデックスレイアウト（alpha_items.xml）であります
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="40dp"
android:layout_height="match_parent"
android:scrollbars="horizontal">
<android.support.v7.widget.CardView
android:layout_width="40dp"
android:layout_height="40dp"
android:scrollbars="horizontal"
>
<TextView
android:id="@+id/txt_alpha"
android:layout_width="40dp"
android:layout_height="40dp"
android:layout_gravity="center_vertical"
android:layout_marginLeft="15dp"
android:layout_marginRight="2dp"
android:text="A"
android:textSize="18dp"
android:focusable="false"
android:focusableInTouchMode="false"
android:gravity="center_vertical"
/>
</android.support.v7.widget.CardView>
</LinearLayout>
画像を表示するロゴアダプター（LogoAdapter.java）：
ここpublic class LogoAdapter extends RecyclerView.Adapter<LogoAdapter.LogoViewHolder> {
public static LogoAdapter adapter;
//declaration fo variables
List<LogoItems> brandLogo = new ArrayList<>();
List<String> selector = new ArrayList<>();
private AddBrandPage addBrandPage;
private Context context;
private CheckBox checkbox;
//the constructor
public LogoAdapter(List<LogoItems> brandLogo, Context context, AddBrandPage addBrandPage) {
this.brandLogo = brandLogo;
this.context = context;
this.addBrandPage = addBrandPage;
}
@Override
public LogoAdapter.LogoViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.logo_items, parent, false);
LogoViewHolder logoViewHolder = new LogoViewHolder(view,addBrandPage);
return logoViewHolder;
}
@Override
public void onBindViewHolder(LogoAdapter.LogoViewHolder holder, int position) {
Picasso.with(context).load(brandLogo.get(position).getLogo()).into(holder.logo);
}
@Override
public int getItemCount() {
return brandLogo.size();
}
//viewholder class
public class LogoViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
//declare variables
private AddBrandPage addBrandPage;
private ImageView logo;
private CheckBox checkbox;
//ViewHolder constructor
public LogoViewHolder(View itemView, AddBrandPage addBrandPage) {
super(itemView);
//initialize variables inside the viewholder constructor
this.addBrandPage = addBrandPage;
logo = (ImageView) itemView.findViewById(R.id.img_logo);
checkbox = (CheckBox) itemView.findViewById(R.id.checkbox);
//set click listener for the checkbox
checkbox.setOnClickListener(this);
logo.setOnClickListener(this);
}
@Override
public void onClick(View v) {
int position = getAdapterPosition();
addBrandPage.prepareSelection(v, position);//method call to populate an arraylist with selected items
}
}
}
ここで画像のXMLレイアウト（Logo_items.xml）
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:cardView="http://schemas.android.com/apk/res-auto"
android:id="@+id/logo_container"
android:layout_width="match_parent"
android:layout_height="100dp"
android:background="@android:color/darker_gray"
android:gravity="center_vertical|center_horizontal"
android:orientation="vertical"
android:paddingBottom="10dp"
android:paddingLeft="10dp"
android:paddingRight="10dp"
android:paddingTop="10dp"
android:visibility="visible"
cardView:layout_collapseParallaxMultiplier="1.0">
<android.support.v7.widget.CardView
android:layout_width="155dp"
android:layout_height="100dp"
android:layout_marginBottom="5dp"
android:layout_marginTop="5dp"
cardView:cardBackgroundColor="@android:color/white">
<GridLayout
android:id="@+id/cardView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center_horizontal|center_vertical"
android:orientation="vertical">
<ImageView
android:id="@+id/img_logo"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_column="1"
android:layout_gravity="center_horizontal|center_vertical"
android:layout_row="0"
android:paddingBottom="5dp"
android:paddingLeft="2.5dp"
android:paddingRight="2.5dp"
android:paddingTop="5dp">
</ImageView>
</GridLayout>
<CheckBox
android:id="@+id/checkbox"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_marginLeft="130dp"
android:layout_marginTop="66dp"
android:onClick="addBrandpage.prepareSelection"
/>
</android.support.v7.widget.CardView>
</LinearLayout>
でlogcatある：
06-16 09:16:24.404 12319-12324/com.test.test I/art: Do partial code cache collection, code=499KB, data=310KB
06-16 09:16:24.429 12319-12324/com.test.test I/art: After code cache collection, code=499KB, data=315KB
06-16 09:16:24.429 12319-12324/com.test.test I/art: Increasing code cache capacity to 2MB
06-16 09:16:32.258 12319-12326/com.test.test W/art: Suspending all threads took: 13.640ms
06-16 09:16:32.260 12319-12319/com.test.test I/Choreographer: Skipped 53 frames! The application may be doing too much work on its main thread.