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Listに持たせるオブジェクトを作成
public class Student { long id; String number; String name; String status; public long getId() { return id; } public void setId(long id) { this.id = id; } public String getNumber() { return number; } public void setNumber(String number) { this.number = number; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getStatus() { return status; } public void setStatus(String tweet) { this.status = tweet; }
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ListViewの行に使うレイアウトファイルを作成する
<?xml version="1.0" encoding="utf-8"?> android:orientation="vertical" android:layout_width="match_parent" android:layout_height="match_parent"> android:id="@+id/status" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentTop="true" android:layout_alignStart="@+id/id" android:layout_marginStart="139dp" android:layout_marginTop="50dp" /> android:id="@+id/name" android:layout_width="279dp" android:layout_height="wrap_content" android:layout_alignParentStart="true" android:layout_alignTop="@+id/status" android:layout_marginStart="50dp" /> android:id="@+id/id" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentTop="true" android:layout_alignStart="@+id/name" android:layout_marginTop="23dp" />
カスタムしたAdapterを作成する
CustomAdapter.javaを作成、下記を追加
package com.example.honka_1;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;
import java.util.ArrayList;
public class CustomAdapter extends BaseAdapter{
Context context;
LayoutInflater layoutInflater = null;
ArrayList studentList;
public CustomAdapter(Context context) {
this.context = context;
this.layoutInflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
public void setTweetList(ArrayList tweetList) {
this.studentList = tweetList;
}
@Override
public int getCount() {
return studentList.size();
}
@Override
public Object getItem(int position) {
return studentList.get(position);
}
@Override
public long getItemId(int position) {
return studentList.get(position).getId();
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
convertView = layoutInflater.inflate(R.layout.studentrow,parent,false);
((TextView)convertView.findViewById(R.id.id)).setText(studentList.get(position).getNumber());
((TextView)convertView.findViewById(R.id.name)).setText(studentList.get(position).getName());
((TextView)convertView.findViewById(R.id.status)).setText(studentList.get(position).getStatus());
return convertView;
}
}
4 ActivityあるいはFragmentにListViewを設置
<?xml version="1.0" encoding="utf-8"?>
xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<ListView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/listView"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true" />
5 ListViewにAdapterをセット
public class Main2Activity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main2);
Intent intent = this.getIntent();
Integer selectedDay = intent.getIntExtra("selectedDay",0);
Log.i("test", selectedDay.toString());
ListView listView = (ListView)findViewById(R.id.listView);
ArrayList<Student> list = new ArrayList<>();
CustomAdapter adapter = new CustomAdapter(Main2Activity.this);
adapter.setTweetList(list);
listView.setAdapter(adapter);
Student student = new Student();
student.setNumber("1");
student.setName("和田");
student.setStatus("出席");
list.add(student);
adapter.notifyDataSetChanged();
}
}