Activity_main.

xml

<ListView

android:id = “@+id/listView”

android:width = “match_parent”

android:height = “match_parent” />

MainActivity.java

class MainActivity extends AppCompactActivity{

ListView listView;

ArrayList<String> arrayList;

ArrayAdapter arrayAdapter;

@Override

protected void onCreate(Bundle saveInstanceState){

setContentView(R.layout.activity_main); Android

//step 1 iOS

listView = findViewById(R.id.listView); Microsoft

arrayList = new ArrayList<>();

arrayList.Add(“Android”);

arrayList.Add(“iOS”);

arrayList.Add(“Microsoft”);

arrayList.Add(“RIM”);

//step 3

arrayAdapter = new ArrayAdapter(MainActivity.this,android.R.lay.simple_list_item_1,arrayList);

//step 4

listView.setAdapter(arrayAdapter);

listView.setOnItemClickListener(int pos)

listView.setOnItemLongClickListener(int pos)
 }

activity_main.xml (res/layout)

<ListView

android:id = “@+id/listView”

android:width = “match_parent”

android:height = “match_parent” />

<GridView

android:id = “@+id/listView”

android:width = “match_parent”

android:height = “match_parent”

android:horizontalSpacing = “???dp” (2-4dp)

android:verticalSpacing = “???dp” (2-4dp)

android:columnWidth=”???dp” (120 – 160dp)

android:numColumns=”???dp”/>

layout_item.xml (res/layout)

Right Click res  new  Layout resource file

<LinearLayout (//RelativeLayout // FrameLayout)

android:width = “match_parent”

android:height = “wrap_content”

android: orientation =”horizontal”>

<ImageView

android:id = “@+id/imageView”

android:width = “100dp”
 android:height = “100dp”

android:src=”@color/primaryDark”/>

<TextView

android:id = “@+id/textView”

android:width = “match_parent”

android:height = “100dp”

android:text = “Name”

android:gravity=”center|left” />

</LinearLayout>
Student.java

Right Click java  com.example.StudentList  class

// Atl+Insert

public class Student {

int image;

String name

public Student (int image, String name){

this.image = image;

this.name = name;

}
StudentAdapter.java

Right Click java  com.example.StudentList  class

//Alt Enter

public StudentAdapter extends ArrayAdapter<Student>{

Context context;

int layout;

ArrayList<Student> arrayList;

public StudentAdapter(Context context,int resource, ArrayList<Student> arrayList){

this.context = context;

this.layout = resource;

this.arrayList = arrayList;

@Override

public View getView(int position, View convertView, ViewGroup parent){

Student student = arrayList.get(position);

converView = LayoutInflater.from(context).inflate(layout,parent,false);

TextView textView = convertView.findViewById(R.id.textView)

ImageView imageView = convertView.findViewById(R.id. imageView)

textView.setText(student.getName());

imageView.setImageResource(student.getImage())

return convertView;

}
class MainActivity extends AppCompactActivity{

ListView listView;

ArrayList<Student> arrayList;

StudentAdapter arrayAdapter;

@Override

protected void onCreate(Bundle saveInstanceState){

setContentView(R.layout.activity_main);

//step 1

listView = findViewById(R.id.listView);

//step 2

// hinh1.jpg getView()
arrayList = new ArrayList<>();

arrayList.Add(new Student(R.drawable.hinh1, “Tom”));

arrayList.Add(new Student(R.drawable.hinh2, “John”));

//step 3

arrayAdapter = new StudentAdapter(MainActivity.this,R.layout.layout_item,arrayList);

//step 4
ListView
listView.setAdapter(arrayAdapter);

btnThem.setOnClickListener(new View.OnClicklListener(){

@Override

public void onClick(View v){

Student s =

new Student(R.drawable.hinh2, “John”);

arrayList.add(s);

arrayAdapter.notifydatasetchanged();
Them
 }

});