复选框的实现

布局文件activity_main.xml

        <TextView
            android:id="@+id/instruction"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_below="@id/temperature"
            android:text="特殊情况（可多选，如有其他需报告的情况请说明）"
            android:textSize="16sp"
            android:layout_marginTop="10dp"/>

        <CheckBox
            android:id="@+id/instruction1"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_below="@id/instruction"
            android:text="无"
            android:background="#FDDEDE"
            android:textSize="16sp"
            android:layout_marginTop="10dp"/>

        <CheckBox
            android:id="@+id/instruction2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_below="@id/instruction1"
            android:text="2020年12月17日至今去过或者现在居住在中高风险地区"
            android:background="#FDDEDE"
            android:textSize="16sp"
            android:layout_marginTop="10dp"/>

        <CheckBox
            android:id="@+id/instruction3"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_below="@id/instruction2"
            android:text="本人或家人正在集中隔离"
            android:background="#FDDEDE"
            android:textSize="16sp"
            android:layout_marginTop="10dp"/>

        <CheckBox
            android:id="@+id/instruction4"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_below="@id/instruction3"
            android:text="今日居住地异动"
            android:background="#FDDEDE"
            android:textSize="16sp"
            android:layout_marginTop="10dp"/>

        <CheckBox
            android:id="@+id/instruction5"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_below="@id/instruction4"
            android:text="其他情况"
            android:background="#FDDEDE"
            android:textSize="16sp"
            android:layout_marginTop="10dp"/>    

MainActivity.java

public class MainActivity extends AppCompatActivity{
    //CheckBox复选框
    private CheckBox check1;
    private CheckBox check2;
    private CheckBox check3;
    private CheckBox check4;
    private CheckBox check5;
    private String str="特殊情况：";
    //提交按钮
    private Button mBtnSubmit;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        //CheckBox复选框
        check1=findViewById(R.id.instruction1);
        check2=findViewById(R.id.instruction2);
        check3=findViewById(R.id.instruction3);
        check4=findViewById(R.id.instruction4);
        check5=findViewById(R.id.instruction5);

        //提交按钮
        mBtnSubmit = findViewById(R.id.btn_submit);
        mBtnSubmit.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                //复选框
                if(check1.isChecked()){
                    str+=check1.getText()+",";
                }
                if(check2.isChecked()){
                    str+=check2.getText()+",";
                }
                if(check3.isChecked()){
                    str+=check3.getText()+",";
                }
                if(check4.isChecked()){
                    str+=check4.getText()+",";
                }
                if(check5.isChecked()){
                    str+=check5.getText()+",";
                }
                Toast.makeText(MainActivity.this,str,Toast.LENGTH_LONG).show();
        }
    }

    //CheckBox复选框
    private CompoundButton.OnCheckedChangeListener listener=new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
            //选中多选框
            CheckBox checkBox=(CheckBox)buttonView;
            //取出当前勾选值
            String str=checkBox.getText().toString();
            //判断是否勾选状态
            if(isChecked){
                str="你选了"+str;
            }else{
                str="你没选"+str;
            }
            Toast.makeText(MainActivity.this,str,Toast.LENGTH_LONG).show();
        }
    };
}