我一直在尝试让自定义Recycler View
适配器
工作。我不太明白为什么它不起作用。我觉得奇怪的是自定义适配器
的代码不执行(因为当我在那里放置断点时它不会中断)并且我确定我绑定(bind)了自定义适配器
到回收器 View
。我希望有人能明白为什么它不起作用。
Activity :
public class payment_history extends AppCompatActivity {
RecyclerView list;
ArrayList<pay_item> list_data;
pay_adapter adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_payment_history);
list_data = new ArrayList<>();
list_data.add(new pay_item(10, 100, "jow", "10"));
list_data.add(new pay_item(10, 100, "joe", "10"));
list_data.add(new pay_item(10, 100, "joe", "10"));
list = findViewById(R.id.payment_history_list);
list.setLayoutManager(new LinearLayoutManager(this));
adapter = new pay_adapter(list_data);
list.setHasFixedSize(true);
list.setAdapter(adapter);
}
}
class pay_item {
int time;
double amount;
String name, table;
pay_item(int time, double amount, String name, String table) {
this.time = time;
this.amount = amount;
this.name = name;
this.table = table;
}
}
适配器:
class pay_adapter extends RecyclerView.Adapter<pay_adapter.viewholder> {
private ArrayList<pay_item> data;
pay_adapter(ArrayList<pay_item> in) {
data = in;
}
@NonNull
@Override
public viewholder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.payment_history_item, parent, false);
return new viewholder(v);
}
@Override
public void onBindViewHolder(@NonNull viewholder holder, int position) {
holder.name.setText(data.get(position).name);
holder.table.setText(data.get(position).table);
holder.amm.setText(String.valueOf(data.get(position).amount));
holder.time.setText(data.get(position).time);
}
@Override
public int getItemCount() {
return 0;
}
static class viewholder extends RecyclerView.ViewHolder {
TextView time, amm, name, table;
viewholder(View view) {
super(view);
time = view.findViewById(R.id.pay_time);
amm = view.findViewById(R.id.pay_amount);
name = view.findViewById(R.id.pay_name);
table = view.findViewById(R.id.pay_table);
}
}
}
行 View :
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingStart="16dp"
android:paddingEnd="16dp">
<TextView
android:id="@+id/pay_time"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:text="Time"
android:textColor="#000000"
android:textSize="36sp" />
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_weight="1"
android:orientation="vertical">
<TextView
android:id="@+id/pay_name"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Name"
android:textColor="#000000"
android:textSize="24sp" />
<TextView
android:id="@+id/pay_table"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="6dp"
android:text="table" />
</LinearLayout>
<TextView
android:id="@+id/pay_amount"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_weight="0"
android:text="Amount"
android:textColor="@color/colorPrimary"
android:textSize="36sp" />
</LinearLayout>
带有回收器 View 的布局:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".payment_history">
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/payment_history_list"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
感谢任何帮助。
最佳答案
两件事
pay_adapter(ArrayList<pay_item> in) {
data = in;
}
@Override
public int getItemCount() {
return data.size() ;
}
关于java - Android Recycler 查看自定义适配器未执行,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/59831750/