Android Study Notes: RadioButton Usage Details

Android Study Notes: RadioButton Usage Details

 

(1) Select the radioGroup icon.

 

(2) The control class is

 

 

Package com. lc. radiobutton; import com. example. radiobutton. r; import android. OS. bundle; import android. app. activity; import android. view. menu; import android. view. view; import android. widget. radioButton; import android. widget. toast; public class MainActivity extends Activity {@ Overrideprotected void onCreate (Bundle savedInstanceState) {super. onCreate (savedInstanceState); setContentView (R. layout. activity_main);}/** set the radio click event. The text */public void onRadioButtonClicked (View view) {RadioButton button = (RadioButton) view is displayed when you click it; boolean isChecked = button. isChecked (); switch (view. getId () {case R. id. radio0: if (isChecked) {Toast. makeText (MainActivity. this, button. getText (), 1 ). show ();} break; case R. id. radio1: if (isChecked) {Toast. makeText (MainActivity. this, button. getText (), 1 ). show ();} break; case R. id. radio2: if (isChecked) {Toast. makeText (MainActivity. this, button. getText (), 1 ). show ();} break; default: break; }}@ Overridepublic boolean onCreateOptionsMenu (Menu menu) {// Inflate the menu; this adds items to the action bar if it is present. getMenuInflater (). inflate (R. menu. main, menu); return true ;}}

(3) display results. Text is displayed when you click