Multiple select button (CheckBox), multiple select button checkbox

Multiple select button (CheckBox), multiple select button checkbox

Today we will introduce the Checkbox multi-choice box:

1. Activity

// Check box, [basic control] --- status switch control CompoundButton and its subclass CheckBox, RadioButton, ToggleButton, switch event listening and scenario use public class CheckBoxActivity extends Activity implements CompoundButton. onCheckedChangeListener {private Context context; private CheckBox sleepCheckBox; private CheckBox dadoudouCheckBox; private CheckBox gameCheckBox; private CheckBox shoppingCheckBox; private CheckBox filmCheckBox; private CheckBox sportChec KBox; private Button submitButton; @ Override protected void onCreate (Bundle savedInstanceState) {super. onCreate (savedInstanceState); setContentView (R. layout. check_box); init (); addAction ();} private void init () {context = this; sleepCheckBox = (CheckBox) findViewById (R. id. sleepCheckBoxId); dadoudouCheckBox = (CheckBox) findViewById (R. id. dadoudouCheckBoxId); gameCheckBox = (CheckBox) findViewById (R. Id. gameCheckBoxId); shoppingCheckBox = (CheckBox) findViewById (R. id. shoppingCheckBoxId); filmCheckBox = (CheckBox) findViewById (R. id. filmCheckBoxId); sportCheckBox = (CheckBox) findViewById (R. id. sportCheckBoxId); submitButton = (Button) findViewById (R. id. submitButtonId);} private void addAction () {sleepCheckBox. setOnCheckedChangeListener (this); dadoudouCheckBox. setOnCheckedChangeListener (this); gameC HeckBox. setOnCheckedChangeListener (this); shoppingCheckBox. setOnCheckedChangeListener (this); filmCheckBox. setOnCheckedChangeListener (this); sportCheckBox. setOnCheckedChangeListener (this); submitButton. setOnClickListener (new View. onClickListener () {public void onClick (View v) {// String constant // StringBuffer String variable (thread safety) // StringBuilder String variable (non-thread safety) stringBuilder sb = new StringBuilder ("your interest is :");// MyStringBuilder. Insert (6, "Beautiful"); // MyStringBuilder. Remove (5, 7); // MyStringBuilder. Replace ('! ','? '); // Code example specifies that the MyStringBuilder object can be expanded to a maximum of 25 white spaces. // StringBuilderMyStringBuilder = new StringBuilder ("Hello World! ", 25); if (sleepCheckBox. isChecked () {sb. append ("sleeping");} if (dadoudouCheckBox. isChecked () {sb. append ("doubebean");} if (gameCheckBox. isChecked () {sb. append ("game");} if (shoppingCheckBox. isChecked () {sb. append ("shopping");} if (filmCheckBox. isChecked () {sb. append ("movie");} if (sportCheckBox. isChecked () {sb. append ("motion");} Toast. makeText (context, sb. toString (), Toast. LENGTH_LONG ). show () ;}}) ;}@ Override public void onCheckedChanged (CompoundButton buttonView, boolean isChecked) {int id = buttonView. getId (); switch (id) {case R. id. sleepCheckBoxId: if (isChecked) {Toast. makeText (context, "you selected \" Sleep \ "", Toast. LENGTH_SHORT ). show ();} else {Toast. makeText (context, "you have canceled \" Sleeping \ "", Toast. LENGTH_SHORT ). show ();} break; case R. id. dadoudouCheckBoxId: if (isChecked) {Toast. makeText (context, "you selected \" Doudou \ "", Toast. LENGTH_SHORT ). show ();} else {Toast. makeText (context, "you have deselected \" Doudou \ "", Toast. LENGTH_SHORT ). show ();} break; case R. id. gameCheckBoxId: if (isChecked) {Toast. makeText (context, "you selected \" game \ "", Toast. LENGTH_SHORT ). show ();} else {Toast. makeText (context, "you have deselected \" game \ "", Toast. LENGTH_SHORT ). show ();} break; case R. id. shoppingCheckBoxId: if (isChecked) {Toast. makeText (context, "you selected \" Shopping \ "", Toast. LENGTH_SHORT ). show ();} else {Toast. makeText (context, "you have deselected \" Shopping \ "", Toast. LENGTH_SHORT ). show ();} break; case R. id. filmCheckBoxId: if (isChecked) {Toast. makeText (context, "you selected \" movie \ "", Toast. LENGTH_SHORT ). show ();} else {Toast. makeText (context, "you have deselected \" movie \ "", Toast. LENGTH_SHORT ). show ();} break; case R. id. sportCheckBoxId: if (isChecked) {Toast. makeText (context, "you selected \" \ "", Toast. LENGTH_SHORT ). show ();} else {Toast. makeText (context, "you have deselected \" \ ", Toast. LENGTH_SHORT ). show () ;}break ;}}}

2. the xml file is as follows:

<? Xml version = "1.0" encoding = "UTF-8"?> <! -- Check box page --> <LinearLayout xmlns: android = "http://schemas.android.com/apk/res/android" android: layout_width = "match_parent" android: layout_height = "match_parent" android: orientation = "vertical" android: padding = "5dp"> <TextView android: layout_width = "match_parent" android: layout_height = "wrap_content" android: text = "Interest:" android: textSize = "20sp"/> <LinearLayout android: layout_width = "match_parent" android: layout_height = "wrap_content" android: orientation = "horizontal"> <CheckBox android: id = "@ + id/sleepCheckBoxId" android: layout_width = "wrap_content" android: layout_height = "wrap_content" android: text = "sleeping"/> <CheckBox android: id = "@ + id/dadoudouCheckBoxId" android: layout_width = "85dp" android: layout_height = "wrap_content" android: text = "Doudou"/> <CheckBox android: id = "@ + id/gameCheckBoxId" android: layout_width = "wrap_content" android: layout_height = "wrap_content" android: text = "game"/> </LinearLayout> <LinearLayout android: layout_width = "match_parent" android: layout_height = "wrap_content" android: orientation = "horizontal"> <CheckBox android: id = "@ + id/shoppingCheckBoxId" android: layout_width = "wrap_content" android: layout_height = "wrap_content" android: text = "shopping"/> <CheckBox android: id = "@ + id/filmCheckBoxId" android: layout_width = "85dp" android: layout_height = "wrap_content" android: text = "movie"/> <CheckBox android: id = "@ + id/sportCheckBoxId" android: layout_width = "wrap_content" android: layout_height = "wrap_content" android: text = ""/> </LinearLayout> <Button android: id = "@ + id/submitButtonId" android: layout_width = "wrap_content" android: layout_height = "wrap_content" android: layout_gravity = "right" android: text = "OK" android: textSize = "20sp"/> </LinearLayout>

3. as follows: