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android基础-CheckBox(复选框)
2020-11-08 12:06:00 【ZHAO_JH】
CheckBox(复选框)
即可以同时选中多个选项,至于获得选中的值,同样有两种方式: 1.为每个CheckBox添加事件:setOnCheckedChangeListener 2.弄一个按钮,在点击后,对每个checkbox进行判断:isChecked();
布局示例 activity_main.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/LinearLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity" >
<CheckBox
android:id="@+id/cbSleep"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="睡觉" />
<CheckBox
android:id="@+id/cbSing"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="唱歌" />
<Button
android:id="@+id/btnShow"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="输出"
android:onClick="show" />
</LinearLayout>
MainActivity.java
package com.example.myapplication;
import java.util.HashMap;
import java.util.Map;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.Toast;
public class MainActivity extends Activity implements OnCheckedChangeListener {
// 创建map字典用于储存选择的内容
private Map map_dict = new HashMap();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// 获取控件
CheckBox cbSing = (CheckBox) findViewById(R.id.cbSing);
CheckBox cbSleep = (CheckBox) findViewById(R.id.cbSleep);
// 绑定事件
cbSing.setOnCheckedChangeListener(this);
cbSleep.setOnCheckedChangeListener(this);
}
@Override
public void onCheckedChanged(CompoundButton checkBox, boolean checked) {
// 判断是否选中,选中就把数据加入到map字典中,如果都没有的话默认移除mao字典所有数据
switch (checkBox.getId()) {
case R.id.cbSing:
if (checked) {
map_dict.put("sing", "唱歌");
}else {
map_dict.remove("sing");
}
break;
case R.id.cbSleep:
if (checked) {
map_dict.put("sleep", "睡觉");
}else {
map_dict.remove("sleep");
}
break;
default:
break;
}
}
public void show(View v) {
// 判断map字典中是否存在数据
if(map_dict.isEmpty()){
Toast.makeText(MainActivity.this, "没有选中任何数据", Toast.LENGTH_SHORT).show();
}else{
Toast.makeText(getApplicationContext(), "您选中的爱好是:" + map_dict, Toast.LENGTH_SHORT).show();
}
}
}
版权声明
本文为[ZHAO_JH]所创,转载请带上原文链接,感谢
https://my.oschina.net/zhaojunhui/blog/4708090
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