MultiAutoCompleteTextView

public class MainActivity extends AppCompatActivity {
private MultiAutoCompleteTextView one;
private String[] res = {"saoxi1","haungdashi1","huangdashi2","saoxi2","zhuguosongsb1"};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ArrayAdapter<String>adapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,res);
one = (MultiAutoCompleteTextView)findViewById(R.id.multiAutoCompleteTextView);
one.setAdapter(adapter);
//设置以逗号为分隔符
one.setTokenizer(new MultiAutoCompleteTextView.CommaTokenizer());
}
}

<MultiAutoCompleteTextView
android:hint="请输入你的邮件"
android:completionThreshold = "3"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:id="@+id/multiAutoCompleteTextView" />