android第三天（多選按鈕checkbox）

1、多選按鈕（CheckBox）的基本概念

 

2、<CheckBox/>與CheckBox

 

3、OnClickListener與OnClickedChangeListener監聽器

package com.huan.security.securityapp;

import android.provider.Settings;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.CheckBox;

public class MainActivity extends AppCompatActivity {

    private CheckBox eatBox;
    private CheckBox sleepBox;
    private CheckBox dotaBox;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.first_layout);

        eatBox=(CheckBox)findViewById(R.id.eatId);
        sleepBox=(CheckBox)findViewById(R.id.sleepId);
        dotaBox=(CheckBox)findViewById(R.id.dotaId);
        OnBoxClickListener listener=new OnBoxClickListener();
        eatBox.setOnClickListener(listener);
        sleepBox.setOnClickListener(listener);
        dotaBox.setOnClickListener(listener);
    }
    //OnClickListener使用方法
    class OnBoxClickListener implements View.OnClickListener{
        @Override
        public void onClick(View view) {//就是checkbox對象，是可以向上轉型爲view
            //view.getId();//控件得ID；
           /*
            System.out.println("id------>"+view.getId());

            if(view.getId()==R.id.eatId){
                System.out.println("eatBox");
            }
            else if (view.getId()==R.id.sleepId){
                System.out.println("sleepId");
            }
            else if (view.getId()==R.id.dotaId){
                System.out.println("doatId");
            }
            */
           CheckBox box=(CheckBox)view;
            if(box.getId()==R.id.eatId){
                System.out.println("eatId");
            }
            else if (box.getId()==R.id.sleepId){
                System.out.println("sleepId");
            }
            else if (box.getId()==R.id.dotaId){
                System.out.println("dotaId");
            }
            if(box.isChecked()){
                System.out.println("checked");
            }
            else{
                System.out.println("unchecked");
            }
            System.out.println("Checkbox is clicked");
        }
    }
}

 

package com.huan.security.securityapp;

import android.provider.Settings;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.CheckBox;
import android.widget.CompoundButton;

public class MainActivity extends AppCompatActivity {

    private CheckBox eatBox;
    private CheckBox sleepBox;
    private CheckBox dotaBox;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.first_layout);

        eatBox=(CheckBox)findViewById(R.id.eatId);
        sleepBox=(CheckBox)findViewById(R.id.sleepId);
        dotaBox=(CheckBox)findViewById(R.id.dotaId);
        CheckBoxListener listener=new CheckBoxListener();
        eatBox.setOnCheckedChangeListener(listener);
        sleepBox.setOnCheckedChangeListener(listener);
        dotaBox.setOnCheckedChangeListener(listener);
    }
    class CheckBoxListener implements CompoundButton.OnCheckedChangeListener{

        @Override
        public void onCheckedChanged(CompoundButton compoundButton, boolean b) {//CompoundButton是checkbox的父類，onCheckedChanged爲checkbox設計的，當選中與被選中狀態改變時，會調用。
            if(compoundButton.getId()==R.id.eatId){
                System.out.println("eatId");
            }
            else if (compoundButton.getId()==R.id.sleepId){
                System.out.println("sleepId");
            }
            else if (compoundButton.getId()==R.id.dotaId){
                System.out.println("dotaId");
            }
            if(b){
                System.out.println("checked");
            }
            else{
                System.out.println("uncheck");
            }
        }
    }
    class OnBoxClickListener implements View.OnClickListener{
        @Override
        public void onClick(View view) {//就是checkbox對象，是可以向上轉型爲view
            //view.getId();//控件得ID；
           /*
            System.out.println("id------>"+view.getId());

            if(view.getId()==R.id.eatId){
                System.out.println("eatBox");
            }
            else if (view.getId()==R.id.sleepId){
                System.out.println("sleepId");
            }
            else if (view.getId()==R.id.dotaId){
                System.out.println("doatId");
            }
            */
           CheckBox box=(CheckBox)view;
            if(box.getId()==R.id.eatId){
                System.out.println("eatId");
            }
            else if (box.getId()==R.id.sleepId){
                System.out.println("sleepId");
            }
            else if (box.getId()==R.id.dotaId){
                System.out.println("dotaId");
            }
            if(box.isChecked()){
                System.out.println("checked");
            }
            else{
                System.out.println("unchecked");
            }
            System.out.println("Checkbox is clicked");
        }
    }
}

多選按鈕全選和全取消簡單實現：

package com.huan.security.securityapp;

import android.provider.Settings;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.CheckBox;
import android.widget.CompoundButton;

public class MainActivity extends AppCompatActivity {

    private CheckBox eatBox;
    private CheckBox sleepBox;
    private CheckBox dotaBox;
    private CheckBox allBox;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.first_layout);

        eatBox=(CheckBox)findViewById(R.id.eatId);
        sleepBox=(CheckBox)findViewById(R.id.sleepId);
        dotaBox=(CheckBox)findViewById(R.id.dotaId);
        allBox=(CheckBox)findViewById(R.id.allbox);
        CheckBoxListener listener=new CheckBoxListener();

        allBox.setOnCheckedChangeListener(listener);
    }
    class CheckBoxListener implements CompoundButton.OnCheckedChangeListener{
        @Override
        public void onCheckedChanged(CompoundButton compoundButton, boolean b) {//CompoundButton是checkbox的父類，onCheckedChanged爲checkbox設計的，當選中與被選中狀態改變時，會調用。
                eatBox.setChecked(b);
                sleepBox.setChecked(b);
                dotaBox.setChecked(b);
        }
    }
    class OnBoxClickListener implements View.OnClickListener{
        @Override
        public void onClick(View view) {//就是checkbox對象，是可以向上轉型爲view
            //view.getId();//控件得ID；
           /*
            System.out.println("id------>"+view.getId());

            if(view.getId()==R.id.eatId){
                System.out.println("eatBox");
            }
            else if (view.getId()==R.id.sleepId){
                System.out.println("sleepId");
            }
            else if (view.getId()==R.id.dotaId){
                System.out.println("doatId");
            }
            */
           CheckBox box=(CheckBox)view;
            if(box.getId()==R.id.eatId){
                System.out.println("eatId");
            }
            else if (box.getId()==R.id.sleepId){
                System.out.println("sleepId");
            }
            else if (box.getId()==R.id.dotaId){
                System.out.println("dotaId");
            }
            if(box.isChecked()){
                System.out.println("checked");
            }
            else{
                System.out.println("unchecked");
            }
            System.out.println("Checkbox is clicked");
        }
    }
}

展示：