Coding

*cấu hình Spiner dạng cơ bản   code : public class MainActivity extends AppCompatActivity { Spinner spinner ; @Override protected void onCreate(Bundle savedInstanceState) { super .onCreate(savedInstanceState); setContentView(R.layout. activity_main ); spinner = (Spinner)findViewById(R.id. spinner ); List list = new ArrayList(); list.add( "thong tin1" ); list.add( "thong tin2" ); list.add( "thong tin3" ); list.add( "thong tin4" ); list.add( "thong tin5" ); ArrayAdapter dataAdapter = new ArrayAdapter( this , android.R.layout. simple_spinner_item , list ); dataAdapter.setDropDownViewResource(android.R.layout. simple_spinner_dropdown_item ); spinner .setAdapter(dataAdapter); spinner .setOnItemSelectedListener( new AdapterView.OnItemSelectedListener() { ...

THAY ĐỔI MỌI THỨ cơ bản về chekbox trong  " android "  code :  package com.example.minhhien.checkbox0604; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.widget.CheckBox; import android.widget.CompoundButton; import android.widget.Toast; public class MainActivity extends AppCompatActivity {     CheckBox ckbAndroid,ckbIos,ckbPhp;     @Override     protected void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.activity_main);         ckbAndroid=(CheckBox) findViewById(R.id.cbAndroid);         ckbIos=(CheckBox) findViewById(R.id.cbIos);         ckbPhp=(CheckBox) findViewById(R.id.cbPhp);         ckbAndroid.setOnCheckedChangeListener(new CompoundButton.OnChecked...

EditText - random 2 các số trong khoảng 2 số nhập vào bằng editText code :  package com.example.minhhien.background0604; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.TextView; import android.widget.Toast; import java.util.ArrayList; import java.util.Random; public class MainActivity extends AppCompatActivity {     EditText min,max;     Button btnLay,btnRanDom;     TextView tvkq;     String a;     ArrayList<Integer> arr;     @Override     protected void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.activity_main);         min=(EditText) findViewById(R.id.editText);         max=(EditText) f...