ListView之二。

activity_main.xml:

<RelativeLayout  

        android:width="match_parent"

        android:height="60dp"

        android:background="@android:color/holo_blue_bright">

<Button 

       android:id= "@+id/btnBack"

       android:centerVertical="true"

       android:text="返回"

       android:width="wrap_content"

       android:height="wrap_content"

android:visibility = "gont"/>

<TextView

       android:width="wrap_content"

       android:height="wrap_content"

       android:text="学生列表"

       android:textSize="20sp"      

       android:centerVertical="true" 

      android:centerHorizontal="true"/>

</RelativeLayout>

<ListView 

      android:layout_width="wrap_content"

      android:layout_height = "wrap_content"

      android:id = "@+id/listViewStudent"

></ListView>

MainActivity.java:

     private ListView listViewStudent;

     this.listViewStudent = (ListView)this.findViewById(R.id.listViewStudent);

     StudentAdapter studentAdapter = new StudentAdapter(this.getData(),this);

     this.listViewStudent.setAdapter(studentAdapter);

     

     private List<Student> getData(){

      List<Student> data = new ArrayList<>();

      for(int idx = 0;idx<30;idx++){

         Student student = new Student();

         student.setHeight(160 + idx);

         student.setName("杨森");

         if(idx % 2 ==0){

        student.setSex("女");

}

else{

        student.setSex("男");

}       

         data.add(student);

     }

return data;

}

StudentAdapter.java extends BaseAdapter:

    public studentAdapter(List<Student>,Activity activity){

          this.studentList = studentList;

          this.activity = activity;

}

    private List<Student> studentList;

    private Activity activity;

/*
显示Item的数量
 */
@Override
public int getCount() {
    System.out.println("-----getCount-----");
    return this.studentList.size();
}

@Override
public Object getItem(int position) {

    System.out.println("-----getItem-----");

    return this.studentList.get(position);

}

@Override
public long getItemId(int position) {

    System.out.println("-----getItemId-----",+position);

    return position;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
//System.out.println("-----getView----"+position);
Student student = this.studentList.get(position);

TextView tvName=(TextView)findViewById(R.id.tvName);
TextView tvHeight=(TextView)findViewById(R.id.tvHeight);
TextView tvSex=(TextView)findViewById(R.id.tvSex);

tvName.setName(student.getName());
tvheight.setName(student.getHeight());
tvSex.setName(student.getSex());

View view = View.inflate(this.activity,R.layout.listview_item_student,null);
    return view;
}