控件_CheckBox(多选按钮)

 1 import android.os.Bundle;

 2 import android.app.Activity;

 3 import android.widget.CheckBox;

 4 import android.widget.CompoundButton;

 5 import android.widget.CompoundButton.OnCheckedChangeListener;

 6 

 7 public class MainActivity extends Activity {

 8     private CheckBox swimBox = null;

 9     private CheckBox runBox = null;

10     private CheckBox readBox = null;

11     protected void onCreate(Bundle savedInstanceState) {

12         super.onCreate(savedInstanceState);

13         setContentView(R.layout.activity_main);

14         

15         swimBox = (CheckBox) findViewById(R.id.swim);

16         runBox = (CheckBox) findViewById(R.id.run);

17         readBox = (CheckBox) findViewById(R.id.read);

18         

19         CheckBoxListener listener = new CheckBoxListener();

20         swimBox.setOnCheckedChangeListener(listener);

21         runBox.setOnCheckedChangeListener(listener);

22         readBox.setOnCheckedChangeListener(listener);

23         /*

24         //多个控件可以使用同一个监听器

25         OnBoxClickListener listener = new OnBoxClickListener();

26         swimBox.setOnClickListener(listener);

27         runBox.setOnClickListener(listener);

28         readBox.setOnClickListener(listener);*/

29     }

30     

31     //

32     class CheckBoxListener implements OnCheckedChangeListener{

33         @Override

34         public void onCheckedChanged(CompoundButton buttonView,boolean isChecked) {

35             if(buttonView.getId()==R.id.read){

36                 System.out.println("read");

37             }else if(buttonView.getId()==R.id.run){

38                 System.out.println("run");

39             }else if(buttonView.getId()==R.id.swim){

40                 System.out.println("swim");

41             }

42             if(isChecked){

43                 System.out.println("Checked");

44             }else{

45                 System.out.println("UnChecked");

46             }

47         }

48         

49     }

50     

51     

52 /*    OnClickListener的使用方法

53     class OnBoxClickListener implements OnClickListener{

54         public void onClick(View view) {                //CheckBox是View的子类，所以可以接收

55             CheckBox box = (CheckBox)view;

56             if(view.getId()==R.id.read)

57                 System.out.println("read");

58             else if(view.getId()==R.id.run)

59                 System.out.println("run");

60             else if(view.getId()==R.id.swim)

61                 System.out.println("swim");

62             

63             if(box.isChecked()){//isChecked方法不是view中的方法所以要向下转型，该方法可以判段是否被选中，如果选中返回真

64                 System.out.println("Checked");

65             }else

66                 System.out.println("unChecked");

67         }

68         

69     }

70 */

71 }

 1 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

 2     xmlns:tools="http://schemas.android.com/tools"

 3     android:orientation="vertical"

 4     android:layout_width="match_parent"

 5     android:layout_height="match_parent"

 6     android:paddingBottom="@dimen/activity_vertical_margin"

 7     android:paddingLeft="@dimen/activity_horizontal_margin"

 8     android:paddingRight="@dimen/activity_horizontal_margin"

 9     android:paddingTop="@dimen/activity_vertical_margin"

10     tools:context=".MainActivity" >

11 

12     

13     

14     <CheckBox

15     android:id="@+id/swim"

16      android:layout_width="wrap_content" 

17       android:layout_height="wrap_content" 

18       android:text="吃饭"

19       />

20     <CheckBox

21     android:id="@+id/run"

22      android:layout_width="wrap_content" 

23       android:layout_height="wrap_content" 

24       android:text="打游戏"

25       />

26     <CheckBox

27     android:id="@+id/read"

28      android:layout_width="wrap_content" 

29       android:layout_height="wrap_content" 

30       android:text="睡觉"

31       />

32 </LinearLayout>

 

实现全选功能：

 1 import android.app.Activity;

 2 import android.os.Bundle;

 3 import android.widget.CheckBox;

 4 import android.widget.CompoundButton;

 5 import android.widget.CompoundButton.OnCheckedChangeListener;

 6 

 7 public class MainActivity extends Activity {

 8     private CheckBox all;

 9     private CheckBox swim;

10     private CheckBox run;

11     private CheckBox read;

12     protected void onCreate(Bundle savedInstanceState) {

13         super.onCreate(savedInstanceState);

14         setContentView(R.layout.activity_main);

15         

16         all = (CheckBox) findViewById(R.id.all);

17         swim = (CheckBox) findViewById(R.id.swim);

18         run = (CheckBox) findViewById(R.id.run);

19         read = (CheckBox) findViewById(R.id.read);

20         

21         AllCheckListener listener = new AllCheckListener();

22         all.setOnCheckedChangeListener(listener);

23     }

24     class AllCheckListener implements OnCheckedChangeListener{

25         public void onCheckedChanged(CompoundButton buttonView,boolean isChecked) {

26             

27             swim.setChecked(isChecked);

28             run.setChecked(isChecked);

29             read.setChecked(isChecked);

30             /*

31             if(isChecked){

32                 swim.setChecked(true);

33                 run.setChecked(true);

34                 read.setChecked(true);

35             }else{

36                 swim.setClickable(false);

37                 run.setChecked(false);

38                 read.setChecked(false);

39             }

40             */

41         }

42         

43     }

44     

45 

46 }

 

 1 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

 2     xmlns:tools="http://schemas.android.com/tools"

 3     android:orientation="vertical"

 4     android:layout_width="match_parent"

 5     android:layout_height="match_parent"

 6     android:paddingBottom="@dimen/activity_vertical_margin"

 7     android:paddingLeft="@dimen/activity_horizontal_margin"

 8     android:paddingRight="@dimen/activity_horizontal_margin"

 9     android:paddingTop="@dimen/activity_vertical_margin"

10     tools:context=".MainActivity" >

11 

12     <CheckBox

13     android:id="@+id/all"

14      android:layout_width="wrap_content" 

15       android:layout_height="wrap_content" 

16       android:text="全选"

17       />

18     

19     <CheckBox

20     android:id="@+id/swim"

21      android:layout_width="wrap_content" 

22       android:layout_height="wrap_content" 

23       android:text="吃饭"

24       />

25     <CheckBox

26     android:id="@+id/run"

27      android:layout_width="wrap_content" 

28       android:layout_height="wrap_content" 

29       android:text="打游戏"

30       />

31     <CheckBox

32     android:id="@+id/read"

33      android:layout_width="wrap_content" 

34       android:layout_height="wrap_content" 

35       android:text="睡觉"

36       />

37 </LinearLayout>