五 CheckBox 复选框
>概念:可以从一个集合选项中选择一个或者多个选项
>属性:checked 选择状态
>使用:
>方式一:使用onclickListner 监听事件(点击事件)
>方式二:使用OnCheckedChangeListener (CompleButton) 状态改变的监听
如果有全选的:全选的按钮的监听必须用onclickListner 监听事件
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<CheckBox
android:id="@+id/sleep"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="睡觉" />
<!--android:checked="true"默认选中 -->
<CheckBox
android:id="@+id/eat"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:checked="true"
android:text="吃饭" />
<CheckBox
android:id="@+id/all"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="全选"
/>
</LinearLayout>package com.fmy.a;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
public class MainActivity extends Activity {
private CheckBox eat;
private CheckBox sleep;
private CheckBox all;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.demo_textview);
sleep = (CheckBox) findViewById(R.id.sleep);
all = (CheckBox) findViewById(R.id.all);
eat = (CheckBox) findViewById(R.id.eat);
MyCheckedChangeListener myListener = new MyCheckedChangeListener();
eat.setOnCheckedChangeListener(myListener);
sleep.setOnCheckedChangeListener(myListener);
all.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
sleep.setChecked(true);
eat.setChecked(true);
}
});
}
class MyCheckedChangeListener implements OnCheckedChangeListener{
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if (eat.isChecked()&&sleep.isChecked()) {
all.setChecked(true);
}else{
all.setChecked(false);
}
}
}
}